CA2280877A1 - Hard-surface cleaning compositions - Google Patents
Hard-surface cleaning compositions Download PDFInfo
- Publication number
- CA2280877A1 CA2280877A1 CA002280877A CA2280877A CA2280877A1 CA 2280877 A1 CA2280877 A1 CA 2280877A1 CA 002280877 A CA002280877 A CA 002280877A CA 2280877 A CA2280877 A CA 2280877A CA 2280877 A1 CA2280877 A1 CA 2280877A1
- Authority
- CA
- Canada
- Prior art keywords
- polymer
- alkyl
- surfactant
- nonionic
- cleaning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 134
- 238000004140 cleaning Methods 0.000 title claims abstract description 72
- 229920000642 polymer Polymers 0.000 claims abstract description 71
- 239000003093 cationic surfactant Substances 0.000 claims abstract description 43
- 239000002736 nonionic surfactant Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229920006318 anionic polymer Polymers 0.000 claims abstract description 12
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000000845 anti-microbial effect Effects 0.000 claims description 23
- -1 R3 is a C6-C22 alkyl Chemical group 0.000 claims description 18
- 125000000217 alkyl group Chemical group 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 18
- 125000002768 hydroxyalkyl group Chemical group 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 11
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 10
- 125000002877 alkyl aryl group Chemical group 0.000 claims description 10
- 229910021645 metal ion Inorganic materials 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 8
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 7
- 229920002125 Sokalan® Polymers 0.000 claims description 7
- 239000004584 polyacrylic acid Substances 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 7
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 claims description 6
- 150000008064 anhydrides Chemical class 0.000 claims description 6
- 239000003945 anionic surfactant Substances 0.000 claims description 6
- 150000001450 anions Chemical class 0.000 claims description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 5
- 239000005977 Ethylene Substances 0.000 claims description 5
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 5
- XJRBAMWJDBPFIM-UHFFFAOYSA-N methyl vinyl ether Chemical compound COC=C XJRBAMWJDBPFIM-UHFFFAOYSA-N 0.000 claims description 5
- 239000004599 antimicrobial Substances 0.000 claims description 4
- 229930195733 hydrocarbon Natural products 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- RWNUSVWFHDHRCJ-UHFFFAOYSA-N 1-butoxypropan-2-ol Chemical compound CCCCOCC(C)O RWNUSVWFHDHRCJ-UHFFFAOYSA-N 0.000 claims description 3
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 claims description 3
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 3
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 claims description 2
- 239000000178 monomer Substances 0.000 claims description 2
- 229910017464 nitrogen compound Inorganic materials 0.000 claims description 2
- 150000002830 nitrogen compounds Chemical group 0.000 claims description 2
- 229920000141 poly(maleic anhydride) Polymers 0.000 claims description 2
- 238000006467 substitution reaction Methods 0.000 claims description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 31
- 125000002091 cationic group Chemical group 0.000 abstract description 19
- 230000003993 interaction Effects 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 abstract description 2
- 238000009472 formulation Methods 0.000 description 27
- 239000000047 product Substances 0.000 description 27
- 210000004215 spore Anatomy 0.000 description 20
- 239000004094 surface-active agent Substances 0.000 description 19
- 238000012360 testing method Methods 0.000 description 18
- 230000009467 reduction Effects 0.000 description 17
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 16
- 230000008901 benefit Effects 0.000 description 16
- 241000894006 Bacteria Species 0.000 description 14
- 238000010790 dilution Methods 0.000 description 12
- 239000012895 dilution Substances 0.000 description 12
- 125000004432 carbon atom Chemical group C* 0.000 description 11
- 150000001875 compounds Chemical class 0.000 description 11
- 239000003599 detergent Substances 0.000 description 11
- 239000000243 solution Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- PTHBKNSHSCMKBV-UHFFFAOYSA-N 4,6,8-trihydroxy-3-(2-hydroxyethyl)-2,3-dihydronaphtho[2,3-f][1]benzofuran-5,10-dione Chemical compound O=C1C2=CC(O)=CC(O)=C2C(=O)C2=C1C=C1OCC(CCO)C1=C2O PTHBKNSHSCMKBV-UHFFFAOYSA-N 0.000 description 8
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical class OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 8
- 238000010791 quenching Methods 0.000 description 8
- 150000003254 radicals Chemical class 0.000 description 8
- PTHBKNSHSCMKBV-ZETCQYMHSA-N versicol Natural products OCC[C@H]1COc2cc3C(=O)c4cc(O)cc(O)c4C(=O)c3c(O)c12 PTHBKNSHSCMKBV-ZETCQYMHSA-N 0.000 description 8
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical group CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 7
- PDIZYYQQWUOPPK-UHFFFAOYSA-N acetic acid;2-(methylamino)acetic acid Chemical compound CC(O)=O.CC(O)=O.CNCC(O)=O PDIZYYQQWUOPPK-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 7
- 238000005201 scrubbing Methods 0.000 description 7
- 239000000725 suspension Substances 0.000 description 7
- 108091003079 Bovine Serum Albumin Proteins 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 230000002209 hydrophobic effect Effects 0.000 description 6
- 239000003752 hydrotrope Substances 0.000 description 6
- QYSGYZVSCZSLHT-UHFFFAOYSA-N octafluoropropane Chemical compound FC(F)(F)C(F)(F)C(F)(F)F QYSGYZVSCZSLHT-UHFFFAOYSA-N 0.000 description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 5
- 239000001888 Peptone Substances 0.000 description 5
- 108010080698 Peptones Proteins 0.000 description 5
- 150000001298 alcohols Chemical class 0.000 description 5
- 229960000686 benzalkonium chloride Drugs 0.000 description 5
- CADWTSSKOVRVJC-UHFFFAOYSA-N benzyl(dimethyl)azanium;chloride Chemical compound [Cl-].C[NH+](C)CC1=CC=CC=C1 CADWTSSKOVRVJC-UHFFFAOYSA-N 0.000 description 5
- 235000014113 dietary fatty acids Nutrition 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 239000000194 fatty acid Substances 0.000 description 5
- 229930195729 fatty acid Natural products 0.000 description 5
- 150000004665 fatty acids Chemical class 0.000 description 5
- 239000000077 insect repellent Substances 0.000 description 5
- 235000019319 peptone Nutrition 0.000 description 5
- 239000000344 soap Substances 0.000 description 5
- 230000003115 biocidal effect Effects 0.000 description 4
- 235000019864 coconut oil Nutrition 0.000 description 4
- 239000003240 coconut oil Substances 0.000 description 4
- 239000007859 condensation product Substances 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- XMGQYMWWDOXHJM-UHFFFAOYSA-N limonene Chemical compound CC(=C)C1CCC(C)=CC1 XMGQYMWWDOXHJM-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 235000019198 oils Nutrition 0.000 description 4
- 239000002304 perfume Substances 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 125000002947 alkylene group Chemical group 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229940096386 coconut alcohol Drugs 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 239000003085 diluting agent Substances 0.000 description 3
- 239000008233 hard water Substances 0.000 description 3
- 230000002045 lasting effect Effects 0.000 description 3
- 230000002906 microbiologic effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- 150000003505 terpenes Chemical class 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- DTGKSKDOIYIVQL-WEDXCCLWSA-N (+)-borneol Chemical compound C1C[C@@]2(C)[C@@H](O)C[C@@H]1C2(C)C DTGKSKDOIYIVQL-WEDXCCLWSA-N 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 2
- 229910021532 Calcite Inorganic materials 0.000 description 2
- CXRFDZFCGOPDTD-UHFFFAOYSA-M Cetrimide Chemical compound [Br-].CCCCCCCCCCCCCC[N+](C)(C)C CXRFDZFCGOPDTD-UHFFFAOYSA-M 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- HNDVDQJCIGZPNO-YFKPBYRVSA-N L-histidine Chemical compound OC(=O)[C@@H](N)CC1=CN=CN1 HNDVDQJCIGZPNO-YFKPBYRVSA-N 0.000 description 2
- 235000014435 Mentha Nutrition 0.000 description 2
- 241001072983 Mentha Species 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 241000589517 Pseudomonas aeruginosa Species 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- KGEKLUUHTZCSIP-HOSYDEDBSA-N [(1s,4s,6r)-1,7,7-trimethyl-6-bicyclo[2.2.1]heptanyl] acetate Chemical compound C1C[C@]2(C)[C@H](OC(=O)C)C[C@H]1C2(C)C KGEKLUUHTZCSIP-HOSYDEDBSA-N 0.000 description 2
- 239000008272 agar Substances 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 239000003139 biocide Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- CKDOCTFBFTVPSN-UHFFFAOYSA-N borneol Natural products C1CC2(C)C(C)CC1C2(C)C CKDOCTFBFTVPSN-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- ULDHMXUKGWMISQ-UHFFFAOYSA-N carvone Chemical compound CC(=C)C1CC=C(C)C(=O)C1 ULDHMXUKGWMISQ-UHFFFAOYSA-N 0.000 description 2
- NEHNMFOYXAPHSD-UHFFFAOYSA-N citronellal Chemical compound O=CCC(C)CCC=C(C)C NEHNMFOYXAPHSD-UHFFFAOYSA-N 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 description 2
- PLMFYJJFUUUCRZ-UHFFFAOYSA-M decyltrimethylammonium bromide Chemical compound [Br-].CCCCCCCCCC[N+](C)(C)C PLMFYJJFUUUCRZ-UHFFFAOYSA-M 0.000 description 2
- 239000000645 desinfectant Substances 0.000 description 2
- IQDGSYLLQPDQDV-UHFFFAOYSA-N dimethylazanium;chloride Chemical compound Cl.CNC IQDGSYLLQPDQDV-UHFFFAOYSA-N 0.000 description 2
- DTGKSKDOIYIVQL-UHFFFAOYSA-N dl-isoborneol Natural products C1CC2(C)C(O)CC1C2(C)C DTGKSKDOIYIVQL-UHFFFAOYSA-N 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 125000001165 hydrophobic group Chemical group 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 235000001510 limonene Nutrition 0.000 description 2
- 229940087305 limonene Drugs 0.000 description 2
- CDOSHBSSFJOMGT-UHFFFAOYSA-N linalool Chemical compound CC(C)=CCCC(C)(O)C=C CDOSHBSSFJOMGT-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000002085 persistent effect Effects 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
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- 229910052700 potassium Inorganic materials 0.000 description 2
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- 238000011084 recovery Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000003352 sequestering agent Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 125000001273 sulfonato group Chemical group [O-]S(*)(=O)=O 0.000 description 2
- 239000003760 tallow Substances 0.000 description 2
- PVNIQBQSYATKKL-UHFFFAOYSA-N tripalmitin Chemical compound CCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCC PVNIQBQSYATKKL-UHFFFAOYSA-N 0.000 description 2
- 230000035899 viability Effects 0.000 description 2
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- 229920003169 water-soluble polymer Polymers 0.000 description 2
- REPVLJRCJUVQFA-UHFFFAOYSA-N (-)-isopinocampheol Natural products C1C(O)C(C)C2C(C)(C)C1C2 REPVLJRCJUVQFA-UHFFFAOYSA-N 0.000 description 1
- IBDVYGIGYPWWBX-WCBMZHEXSA-N (1r,3s)-1-methyl-3-propan-2-ylcyclopentane-1-carboxylic acid Chemical compound CC(C)[C@H]1CC[C@@](C)(C(O)=O)C1 IBDVYGIGYPWWBX-WCBMZHEXSA-N 0.000 description 1
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- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 1
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- SIDULKZCBGMXJL-UHFFFAOYSA-N 1-dimethylphosphoryldodecane Chemical compound CCCCCCCCCCCCP(C)(C)=O SIDULKZCBGMXJL-UHFFFAOYSA-N 0.000 description 1
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- IIZPXYDJLKNOIY-JXPKJXOSSA-N 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCC\C=C/C\C=C/C\C=C/C\C=C/CCCCC IIZPXYDJLKNOIY-JXPKJXOSSA-N 0.000 description 1
- JBVOQKNLGSOPNZ-UHFFFAOYSA-N 2-propan-2-ylbenzenesulfonic acid Chemical class CC(C)C1=CC=CC=C1S(O)(=O)=O JBVOQKNLGSOPNZ-UHFFFAOYSA-N 0.000 description 1
- WWJLCYHYLZZXBE-UHFFFAOYSA-N 5-chloro-1,3-dihydroindol-2-one Chemical compound ClC1=CC=C2NC(=O)CC2=C1 WWJLCYHYLZZXBE-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 241000228245 Aspergillus niger Species 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
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- RUPBZQFQVRMKDG-UHFFFAOYSA-M Didecyldimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCC[N+](C)(C)CCCCCCCCCC RUPBZQFQVRMKDG-UHFFFAOYSA-M 0.000 description 1
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- KGEKLUUHTZCSIP-UHFFFAOYSA-N Isobornyl acetate Natural products C1CC2(C)C(OC(=O)C)CC1C2(C)C KGEKLUUHTZCSIP-UHFFFAOYSA-N 0.000 description 1
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- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
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- 241001103617 Pseudomonas aeruginosa ATCC 15442 Species 0.000 description 1
- 241000235070 Saccharomyces Species 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 235000014680 Saccharomyces cerevisiae Nutrition 0.000 description 1
- 239000004133 Sodium thiosulphate Substances 0.000 description 1
- 241000191940 Staphylococcus Species 0.000 description 1
- 241000191967 Staphylococcus aureus Species 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical class OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 239000001940 [(1R,4S,6R)-1,7,7-trimethyl-6-bicyclo[2.2.1]heptanyl] acetate Substances 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
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- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical class [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
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- 239000002518 antifoaming agent Substances 0.000 description 1
- 210000004666 bacterial spore Anatomy 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 229940116229 borneol Drugs 0.000 description 1
- 229940115397 bornyl acetate Drugs 0.000 description 1
- 229930008380 camphor Natural products 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000011545 carbonate/bicarbonate buffer Substances 0.000 description 1
- 150000007942 carboxylates Chemical group 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- RFFOTVCVTJUTAD-UHFFFAOYSA-N cineole Natural products C1CC2(C)CCC1(C(C)C)O2 RFFOTVCVTJUTAD-UHFFFAOYSA-N 0.000 description 1
- 229960005233 cineole Drugs 0.000 description 1
- 150000001860 citric acid derivatives Chemical class 0.000 description 1
- 229930003633 citronellal Natural products 0.000 description 1
- 235000000983 citronellal Nutrition 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000002338 cryopreservative effect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical compound [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 description 1
- 235000011180 diphosphates Nutrition 0.000 description 1
- SYELZBGXAIXKHU-UHFFFAOYSA-N dodecyldimethylamine N-oxide Chemical compound CCCCCCCCCCCC[N+](C)(C)[O-] SYELZBGXAIXKHU-UHFFFAOYSA-N 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 230000001605 fetal effect Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000002538 fungal effect Effects 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical group 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 229960002885 histidine Drugs 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000005660 hydrophilic surface Effects 0.000 description 1
- 125000004356 hydroxy functional group Chemical group O* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000000787 lecithin Substances 0.000 description 1
- 235000010445 lecithin Nutrition 0.000 description 1
- 229940067606 lecithin Drugs 0.000 description 1
- 239000010501 lemon oil Substances 0.000 description 1
- 229930007744 linalool Natural products 0.000 description 1
- 229940057995 liquid paraffin Drugs 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000001771 mentha piperita Substances 0.000 description 1
- 239000001220 mentha spicata Substances 0.000 description 1
- 230000003641 microbiacidal effect Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical class OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 235000017524 noni Nutrition 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000003605 opacifier Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- MPQXHAGKBWFSNV-UHFFFAOYSA-N oxidophosphanium Chemical group [PH3]=O MPQXHAGKBWFSNV-UHFFFAOYSA-N 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000312 peanut oil Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- NIXKBAZVOQAHGC-UHFFFAOYSA-N phenylmethanesulfonic acid Chemical class OS(=O)(=O)CC1=CC=CC=C1 NIXKBAZVOQAHGC-UHFFFAOYSA-N 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010665 pine oil Substances 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920000053 polysorbate 80 Polymers 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000013207 serial dilution Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- QUCDWLYKDRVKMI-UHFFFAOYSA-M sodium;3,4-dimethylbenzenesulfonate Chemical compound [Na+].CC1=CC=C(S([O-])(=O)=O)C=C1C QUCDWLYKDRVKMI-UHFFFAOYSA-M 0.000 description 1
- 235000015096 spirit Nutrition 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000008223 sterile water Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000000475 sunscreen effect Effects 0.000 description 1
- 239000000516 sunscreening agent Substances 0.000 description 1
- 239000000375 suspending agent Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- 239000006150 trypticase soy agar Substances 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/48—Medical, disinfecting agents, disinfecting, antibacterial, germicidal or antimicrobial compositions
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/835—Mixtures of non-ionic with cationic compounds
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/37—Polymers
- C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C11D3/3757—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions
- C11D3/3765—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions in liquid compositions
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/38—Cationic compounds
- C11D1/62—Quaternary ammonium compounds
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/72—Ethers of polyoxyalkylene glycols
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
Abstract
The invention provides a hard surface cleaning composition of pH 3-11 comprising: a) 1-30 % nonionic surfactant, b) 0.005-5 % of a water soluble, anionic polymer having an average molecular weight of less than 1000000, said polymer being free of quaternary nitrogen groups, wherein, the ratio of polymer: nonionic is 0.1: 1 or less, and, c) 0.005-5 % of a cationic surfactant. It is believed that in the presence of the cationic surfactant, negatively charged (i.e. carboxylic dissociated) polymer can interact with the cationic surfactant and the nonionic surfactant to form a three-component complex which deposit the nonionic surfactant upon the soil and/or surface being cleaned. While the mechanism is not entirely clear, this may possibly be due to the interaction of the charged polymer with mixed miscelles of cationic and nonionic surfactant.
Description
Technical 1?ielc~
The present invention relates to general purpose, hard surface, liquid cleaning compositions comprising nonionic surfactants and polymeric components.
Compositions for cleaning hard surfaces generally comprise one or more nonionic surfactants as cleaning agents involved in the removal of soil from the surface. Nonionic surfactants have far better fatty soil detergency than charged surfactants and are typically used in general purpose cleaning compositions for hard surfaces such as kitchen worktops, bathroom fittings, floors and the like.
A broad range of nonionic surfactants are known and used in cleaning compositions. For example, these surfactants typically comprise alkoxylated alcohols described as compounds produced by the condensation of alkylene oxide groups, which are hydrophilic in nature, with an organic hydrophobic compound which may be aliphatic or alkyl aromatic in nature.
The length of the hydrophilic or polyaxyalkylene radical which is condensed with any particular hydrophobic group can be readily adjusted to yield a water-soluble compound having the desired degree of balance between hydrophilic and hydrophobic elements. Particular examples include the condensation product of aliphatic alcohols having from 8 to 22 carbon atoms in either straight or branched chain configuration with ethylene oxide, such as a coconut oil ethylene oxide condensate having from 2 to 15 moles of ethylene oxide per mole of coconut alcohol; alternatives include condensates of alkylphenols whose alkyl group contains from 6 to 12 carbon atoms with 5 to 25 moles of ethylene oxide per mole of alkylphenol.
It is known to incorporate components into a nonionic surfactant-based composition with the intention that deposition of such components onto surfaces will provide a protective layer against soiling in a one step cleaning operation. Our published application WO 94/26858 discloses how certain anionic polymers can be used, together with nonionic surfactants, both to improve initial cleaning and to prevent soil redeposition on hard surfaces which have been cleaned with compositions comprising these polymers. It is believed that the polymer not only improves the initial detergency of the formulation but is also deposited on the surface during the cleaning process, leaving a protective film which either prevents soil adhesion or assists in soil removal. In addition to the anionic polymers it is known to deposit silicone materials and fluorosurfactants so as to achieve the same end.
WO 94/26858 discloses how cleaning compositions which deposit a protective film of polymer may be prepared at acid pH's. As is noted in WO 94/26858, the benefit of these polymers was lost as the pH of the prior products was increased.
Furthermore, one recognised difficulty with acid products is that they have the potential to damage certain surfaces, particularly enamels such as those used on baths. It is also preferred that cleaning compositions should be formulated at high pH so as to give particularly good fatty soil detergency.
It is therefore desirable to be able to formulate products across the entire pH range 3-11 while maintaining the soil release and low effort cleaning benefits outlined in the above mentioned case.
Brief Descrifltion of the Invention We have now determined that the presence of cationic surfactant enables the pH of nonionic and polymer containing products to be increased, without the loss of the benefits due to polymers. While it is believed that this enables the difficulties associated with low pH formulations to be overcome the incorporation of cationic surfactants has additional advantages as set out below.
Accordingly the invention provides a hard surface cleaning composition of 'pH 3-12 comprising:
a) 1-30~ nonionic surfactant, b) 0.005-5~ c~f a water soluble, anionic polymer having an average molecular weight of less than 1000000, said polymer being free of quaternazy nitrogen groups, wherein, the ratio of polymer: nonionic is 0.1:1 or less, and, c) 0.005-5~ of a cationic surfactant.
A further aspect of the present invention relates to a method for cleaning hard surfaces which comprises the step of treating the surface with a cleaning composition of pH 3-12 comprising:
a) 1-30~ noni.onic surfactant, WO 98/40452 PC1'/EP98/01273 b) 0.005-5~ of a water soluble, anionic polymer having an average molecular weight of less than 1000000, said polymer being free of quaternary nitrogen groups, wherein, the ratio of polymer: nonionic is 0.1:1 or less, and, c) 0.005-5~ of a cationic surfactant.
Without wishing to limit the present invention by reference to any theory of operation it is believed that enhanced detergency of nonionic surfactants, at acid pH, in the presence of polymer is due to the formation of a hydrogen bonded complex between the nonionic surfactant and the uncharged, undissociated carboxylic acid groups of the polymer. As the pH is raised, the acid groups of the polymer dissociate and the hydrogen-bonded complex is no longer formed. It is believed that in the presence of the cationic surfactant required by the present invention, negatively charged (i.e. carboxylic dissociated) polymer can interact with the cationic surfactant and the nonionic surfactant to form a three-component complex which deposit the nonionic surfactant upon the soil and/or surface being cleaned. While the mechanism is not entirely clear, this may possibly be due to the interaction of the charged polymer with mixed miscelles of cationic and nonionic surfactant.
It is believed that the deposition of the complex on the surface has two results. Firstly the concentration of the surfactant at the surface is increased, resulting in improved cleaning in the initial cleaning cycle and a reduction in the so-called primary cleaning effort. It is also believed that -the complex, or at least some part of it, remains on the surface after cleaning and prevents or reduces the re- -attachment of soil to the surface thereby making the surface easier to clean in second and subsequent cleaning cycles, i.e.
it reduces the ''secondary' cleaning effort.
The presence of a cationic surfactant in the compositions of the invention can also provide an antimicrobial effect during primary cleaning where the cationic is antimicrobial. Using compositions according to the invention it is possible to achieve a log 5 reduction in populations of bacteria.
Surprisingly, wE~ have determined that compositions according to the invention which contain antimicrobial cationic surfactants show longer lasting hygiene on surfaces which have been treated with the compositions and can maintain the antimicrobial effect even after the surfaces have been rinsed.
This is believed to be due in part to the retention of antimicrobial components of the formulation at the surface and may be due in part to the formulation preventing re-adhesion of microbes on t;he surface.
Accordingly, a third aspect of the present invention relates to the use, in a surface cleaning composition comprising nonionic surfactant and an antimicrobial cationic surfactant, of a water soluble, anionic polymer having an average molecular weighi~ of less than 1000000, said polymer being free of quaternary nitrogen groups, to prolong the antimicrobial effectiveness o:E the antimicrobial cationic surfactant on said surface.
As will be expl<~ined in further detail below, the compositions of the invention can comprise other benefit components which become deposited at the surface during a cleaning operation performed with ouch a composition.
The present invention relates to general purpose, hard surface, liquid cleaning compositions comprising nonionic surfactants and polymeric components.
Compositions for cleaning hard surfaces generally comprise one or more nonionic surfactants as cleaning agents involved in the removal of soil from the surface. Nonionic surfactants have far better fatty soil detergency than charged surfactants and are typically used in general purpose cleaning compositions for hard surfaces such as kitchen worktops, bathroom fittings, floors and the like.
A broad range of nonionic surfactants are known and used in cleaning compositions. For example, these surfactants typically comprise alkoxylated alcohols described as compounds produced by the condensation of alkylene oxide groups, which are hydrophilic in nature, with an organic hydrophobic compound which may be aliphatic or alkyl aromatic in nature.
The length of the hydrophilic or polyaxyalkylene radical which is condensed with any particular hydrophobic group can be readily adjusted to yield a water-soluble compound having the desired degree of balance between hydrophilic and hydrophobic elements. Particular examples include the condensation product of aliphatic alcohols having from 8 to 22 carbon atoms in either straight or branched chain configuration with ethylene oxide, such as a coconut oil ethylene oxide condensate having from 2 to 15 moles of ethylene oxide per mole of coconut alcohol; alternatives include condensates of alkylphenols whose alkyl group contains from 6 to 12 carbon atoms with 5 to 25 moles of ethylene oxide per mole of alkylphenol.
It is known to incorporate components into a nonionic surfactant-based composition with the intention that deposition of such components onto surfaces will provide a protective layer against soiling in a one step cleaning operation. Our published application WO 94/26858 discloses how certain anionic polymers can be used, together with nonionic surfactants, both to improve initial cleaning and to prevent soil redeposition on hard surfaces which have been cleaned with compositions comprising these polymers. It is believed that the polymer not only improves the initial detergency of the formulation but is also deposited on the surface during the cleaning process, leaving a protective film which either prevents soil adhesion or assists in soil removal. In addition to the anionic polymers it is known to deposit silicone materials and fluorosurfactants so as to achieve the same end.
WO 94/26858 discloses how cleaning compositions which deposit a protective film of polymer may be prepared at acid pH's. As is noted in WO 94/26858, the benefit of these polymers was lost as the pH of the prior products was increased.
Furthermore, one recognised difficulty with acid products is that they have the potential to damage certain surfaces, particularly enamels such as those used on baths. It is also preferred that cleaning compositions should be formulated at high pH so as to give particularly good fatty soil detergency.
It is therefore desirable to be able to formulate products across the entire pH range 3-11 while maintaining the soil release and low effort cleaning benefits outlined in the above mentioned case.
Brief Descrifltion of the Invention We have now determined that the presence of cationic surfactant enables the pH of nonionic and polymer containing products to be increased, without the loss of the benefits due to polymers. While it is believed that this enables the difficulties associated with low pH formulations to be overcome the incorporation of cationic surfactants has additional advantages as set out below.
Accordingly the invention provides a hard surface cleaning composition of 'pH 3-12 comprising:
a) 1-30~ nonionic surfactant, b) 0.005-5~ c~f a water soluble, anionic polymer having an average molecular weight of less than 1000000, said polymer being free of quaternazy nitrogen groups, wherein, the ratio of polymer: nonionic is 0.1:1 or less, and, c) 0.005-5~ of a cationic surfactant.
A further aspect of the present invention relates to a method for cleaning hard surfaces which comprises the step of treating the surface with a cleaning composition of pH 3-12 comprising:
a) 1-30~ noni.onic surfactant, WO 98/40452 PC1'/EP98/01273 b) 0.005-5~ of a water soluble, anionic polymer having an average molecular weight of less than 1000000, said polymer being free of quaternary nitrogen groups, wherein, the ratio of polymer: nonionic is 0.1:1 or less, and, c) 0.005-5~ of a cationic surfactant.
Without wishing to limit the present invention by reference to any theory of operation it is believed that enhanced detergency of nonionic surfactants, at acid pH, in the presence of polymer is due to the formation of a hydrogen bonded complex between the nonionic surfactant and the uncharged, undissociated carboxylic acid groups of the polymer. As the pH is raised, the acid groups of the polymer dissociate and the hydrogen-bonded complex is no longer formed. It is believed that in the presence of the cationic surfactant required by the present invention, negatively charged (i.e. carboxylic dissociated) polymer can interact with the cationic surfactant and the nonionic surfactant to form a three-component complex which deposit the nonionic surfactant upon the soil and/or surface being cleaned. While the mechanism is not entirely clear, this may possibly be due to the interaction of the charged polymer with mixed miscelles of cationic and nonionic surfactant.
It is believed that the deposition of the complex on the surface has two results. Firstly the concentration of the surfactant at the surface is increased, resulting in improved cleaning in the initial cleaning cycle and a reduction in the so-called primary cleaning effort. It is also believed that -the complex, or at least some part of it, remains on the surface after cleaning and prevents or reduces the re- -attachment of soil to the surface thereby making the surface easier to clean in second and subsequent cleaning cycles, i.e.
it reduces the ''secondary' cleaning effort.
The presence of a cationic surfactant in the compositions of the invention can also provide an antimicrobial effect during primary cleaning where the cationic is antimicrobial. Using compositions according to the invention it is possible to achieve a log 5 reduction in populations of bacteria.
Surprisingly, wE~ have determined that compositions according to the invention which contain antimicrobial cationic surfactants show longer lasting hygiene on surfaces which have been treated with the compositions and can maintain the antimicrobial effect even after the surfaces have been rinsed.
This is believed to be due in part to the retention of antimicrobial components of the formulation at the surface and may be due in part to the formulation preventing re-adhesion of microbes on t;he surface.
Accordingly, a third aspect of the present invention relates to the use, in a surface cleaning composition comprising nonionic surfactant and an antimicrobial cationic surfactant, of a water soluble, anionic polymer having an average molecular weighi~ of less than 1000000, said polymer being free of quaternary nitrogen groups, to prolong the antimicrobial effectiveness o:E the antimicrobial cationic surfactant on said surface.
As will be expl<~ined in further detail below, the compositions of the invention can comprise other benefit components which become deposited at the surface during a cleaning operation performed with ouch a composition.
Various preferred and essential features of the invention are described in further detail below.
The water soluble polymer is an essential component of the compositions according to the present invention.
As noted above the polymers according to the invention are water soluble polymers having an average molecular weight of less than 1000000, and being free of quaternary nitrogen groups. Typically, these polymers are polymers bearing carboxylate functional groups although the use of other anionic polymers is not excluded. In the context of the present invention, anionic polymers are those which carry a negative charge or similar polymers in protonated form.
Mixtures of polymers can be employed.
The preferred polymers in embodiments of the present invention are those which are readily available in the marketplace.
These are polymers of acrylic or methacrylic acid or malefic anhydride, or a co-polymer of one or more of the same either together or with other monomers.
Particularly suitable polymers include polyacrylic acid, polymaleic anhydride and copolymers of either of the aforementioned with ethylene, styrene and methyl vinyl ether.
The most preferred polymers are malefic anhydride co-polymers, preferably those formed with styrene, acrylic acid, methyl vinyl ether and ethylene.
Preferably, the molecular weight of the polymer is at least, 5000, more preferably at least 50,000 and most preferably in excess of 100,000. VERSICOL E-11 [RTM] (ex. Allied Colloids) which is a polyacrylic acid, has been found to be a suitable polymer for use in compositions according to the invention.
Typically, the surfactant based cleaning compositions comprise at least O.Olwt'~ polymer, on product. The positive benefit of the presence of polymer as regards the improvement in cleaning properties can :be identified even when very low levels of polymer and surfactant are present. This property of a low concentration threshold is particularly advantageous in applications of the invention where considerable dilution is expected, such as in floor cleaning.
Preferably the level of polymer is 0.05-S.Owt~ at which level the anti-resailing benefits become particularly significant.
More preferably 0.2-2.Owt~ of polymer is present. We have determined that higher levels of polymer do not give significant further cleaning advantages with common dilution factors, while increasing the cost of compositions. It is believed that high levels of polymer increase the viscosity of the product and. hinder product wetting and penetration of the soil. However, for concentrated products which are significantly dliluted prior to use, the initial polymer level can be as high as 5$wt.
As mentioned ax>ove, the molecular weight of the polymer is preferably belt>w 1 000 000 Dalton. It is believed that as the molecular weight increases the cleaning benefit of the polymer - is reduced.
_ g _ It is essential that compositions according to the present invention comprise at least one nonionic surfactant.
The composition according to the invention comprise detergent actives which can be chosen from commercially available nonionic detergent actives. Suitable nonionic detergent active compounds can be broadly described as compounds produced by the condensation of alkylene oxide groups, which are hydrophilic in nature, with an organic hydrophobic compound which may be aliphatic or alkyl aromatic in nature.
Alkoxylated alkanols are particularly preferred.
The length of the hydrophilic or polyoxyalkylene radical which is condensed with any particular hydrophobic group can be readily adjusted to yield a water-soluble compound having the desired degree of balance between hydrophilic and hydrophobic elements. In general, the compounds will be alkoxylated alcohols having C8-C22 alkyl chains and 1-20 molar equivalents of ethylene oxide and/or propylene oxide residues attached thereto.
Particular examples include the condensation product of aliphatic alcohols having from 8 to 18 carbon atoms in either straight or branched chain configuration with 2-15 moles of ethylene oxide. Examples of such materials include a coconut oil ethylene oxide condensate having from 2 to 15 moles of ethylene oxide per mole of coconut alcohol; condensates of alkylphenols whose alkyl group contains from 6 to 12 carbon atoms with 5 to 25 moles of ethylene oxide per mole of alkylphenol. -The preferred nonionic surfactants are the condensation products of 9-15 carbon alcohols with 3-10 moles of ethylene oxide. In embodiments of the invention we have found that _ g _ DOBANOL [RTM] series ethoxylated alcohol nonionic surfactants (ex. Shell) are suitable. Preferred materials include DOBANOL
91-5 [TM) (C9-C11 alkyl, 5 EO alkyl ethoxylate ex. Shell) and DOBANOL 91-8 (TM] (C9-C11 alkyl, 8 EO alkyl ethoxylate ex.
Shell).
It is possible to use mixtures of nonionic surfactants. As will be described in more detail below these mixed systems have some advantages in antifoaming the products.
Alternative nonionic surfactant materials which are envisaged include condensates of the reaction product of ethylenediamine and propylene oxide with ethylene oxide, the condensates containing from 40 to 80~ of polyoxyethylene radicals by weight and having a molecular weight of from 5,000 to 11,000;
tertiary amine oxides of structure R3N0, where one group R is an alkyl group of 8 to 18 carbon atoms and the others are each methyl, ethyl or hydroxy-ethyl groups, for instance dimethyldodecylamine oxide; tertiary phosphine oxides of structure R3P0, where one group R is an alkyl group of from 10 to 18 carbon atoms, and the others are each alkyl or hydroxyalkyl groups of 1 to 3 carbon atoms, for instance dimethyldodecylphosphine oxide; and dialkyl sulphoxides of structure RZSO where the group R is an alkyl group of from 10 to 18 carbon atoms and the other is methyl or ethyl, for instance methyltetradecyl sulphoxide; fatty acid alkylolamides; alkylene oxide condensates of fatty acid alkylolamides a:nd alkyl mercaptans. In addition, it is believed that alkyl polyglycoside surfactants can be employed as the nonionic surfactant.
The amount of nonionic detergent active to be employed in the composition of the invention will generally be from 1 to 30~wt, preferably from 3 to l5~wt. Levels of above 15~ active show little increase in neat-use cleaning performance, although such higher levels can be employed in products intended to be considerably diluted prior to use. Typical compositions will comprise 5-l0~wt nonionic active on product.
Anionic surfactant can be present in relatively small proportions, however it is preferable that anionic surfactant is absent from composition. As described in further detail below small amounts of anionic detergents may be present in the form of soaps as part of an antifoam system. It is preferred that the compositions of the invention comprise less than 2~wt, preferably less than 1~ of anionic surfactant.
Typically the cationic surfactants are materials of the general formula RlRzR3R4N+X-, wherein all of the radicals are hydrocarbons with or without hydroxy substitution, at least one of the radicals R1-R4 is a C6-C22 alkyl, alkaryl or hydroxyalkyl, at least one of the radicals R1-R4 is a C1-C4 alkyl or hydroxy alkyl and X is a monovalent anion equivalent.
The cationic surfactants are preferably, quaternary nitrogen 2 0 compounds of the general formula R1RZR3R4N'X-, where R1 and R2 are the same or different C1-C4 alkyl or hydroxy alkyl, R3 is a C6-C22 alkyl, alkaryl or hydroxyalkyl, R4 is a C1-C22 alkyl, alkaryl or hydroxyalkyl and X is a monovalent anion equivalent.
Preferably X is a halogen, most preferably chloride or bromide.
Preferably R1 and R2 are methyl. In embodiments of the invention R3 is preferably C8-C18 alkyl, more preferably C10-C16 alkyl. In embodiments of the invention R4 is preferably -methyl, C8-C18 alkyl or benzyl. Thus, the cationic surfactants used can have three 'short chain' radicals such as methyl and one fatty-soluble 'long chain' radical or two 'short' chains and two fatty-soluble 'long chains', wherein the 'long chains' can be either linear or branched hydrocarbons or contain aromatic rings.
A further advantage of including a cationic surfactant in the compositions of: the invention is that preferred cationic surfactants confer antimicrobial properties on the formulation. :surprisingly, we have determined that compositions according to the invention which contain antimicrobial c:ationic surfactants show longer lasting hygiene on surfaces which have been treated with the compositions.
Particularly suitable cationic detergent-active compounds include cetylti:imethyl amanonium bromide (CTAB), hardened di-tallow di-methyl ammonium chloride (available in the marketplace as BARDAC 2250), benzalkonium chloride and mixtures thereof.
The cationic surfactants which comprise one aryl substituent are especially preferred as they are believed to give particularly good antimicrobial effects.
Typical levels of cationic surfactant will lie in the range of 0.05-3~wt on product. Preferred levels of cationic surfactant are around 1-3~wt.
The total amount of detergent active compound to be employed in the detergent composition of the invention will generally be from 1.5 to 30~, preferably from 2 to 20~ by weight, most preferably from 5-20wt~.
Solvents may be present in the compositions of the invention.
It is preferred that the compositions of the present invention comprise not more than 2~wt of solvents of the general formula:
Rl- 0 - ( E 0 ) m- ( PO ) n-R2 , wherein R1 and RZ are independently C2-6 alkyl or H, but not both hydrogen, m and n are independently 0-5. It is believed that the use of polymers in compositions according to the present invention can offset the otherwise deleterious effects of any solvent which is present when the product is used on certain plastics materials.
More preferably, no more than 2$wt of solvent selected from the group comprising di-ethylene glycol mono n-butyl ether, mono-ethylene glycol mono n-butyl ether, propylene glycol n-butyl ether and mixtures thereof is present. Advantageously, effectively no solvent other than water is present.
Fetal ion binding agents Preferably the composition contain either detergent builders or non-building metal ion sequesterants, collectively these are known as metal ion binding agents.
Suitable metal ion binding agents include nitrilotriacetates, -polycarboxylates, citrates, dicarboxylic acids, water-soluble phosphates especially polyphosphates, mixtures of ortho- and pyrophosphate, zeolites and mixtures thereof. Such agents can additionally function as abrasives if present in an amount in excess of their solubility in water as explained herein. In general, where the metal ion binding agent is a builder it will preferably will form from 0.05 to 25~ by weight of the composition.
Metal ion binding agents such as ethylenediaminetetraacetates (e.g. EDTA), amino-polyphosphonates (e.g. those available as the 'DEQUEST' (TM) series of materials) and phosphates and a wide variety o:f other poly-functional organic acids and salts (including materials such as methyl glycine diacetate (MGDA)), can also optionally be employed.
A particular, further advantage of including metal ion binding agents, preferably organic acetates, more preferably MGDA or EDTA is believed to be that the microbiocidal properties of the cationic surfactants are improved especially against Gram-negative bacteria particularly under hard water conditions.
Preferred levels of metal ion binding agents are 0.05-5~wt, preferably 0.1-3.O~wt, most preferably 1.5-3~wt. In preferred compositions containing around 2~ cationic surfactant, 1.5-3~
of an organic acetate sequesterant will give a log five reduction in viable bacteria even against recalcitrant bacterial strains such as Pseudomomas aeruginosa.
Preferred compositions according to the invention contain 1.5-3~wt of MGDA or EDTA.
In addition to the cleaning benefit we have determined that the formulation containing polymer, alcohol, ethoxylate, - cationic surfactant and sequestering agent has the additional benefit that it reduces the adhesion of fungal and/or bacterial spores to surfaces. This is described in further detail below with reference to examples.
The composition according to the invention can contain other ingredients which aid in their cleaning performance and general utility.
Typically, a further optional ingredient for compositions according to the invention is a suds regulating material, which can be employed in compositions according to the invention which have a tendency to produce excessive suds in use. One example of a suds regulating material is soap.
Soaps are salts of fatty acids and include alkali metal soaps such as the sodium, potassium, ammonium and alkanol ammonium salts of higher fatty acids containing from about 8 to about 24 carbon atoms, and preferably from about 10 to about 20 carbon atoms. Particularly useful are the sodium and potassium and mono-, di- and triethanolamine salts of the mixtures of fatty acids derived from coconut oil and ground nut oil. When employed, the amount of soap can form at least 0.005, preferably 0.5~ to 2~ by weight of the composition.
Further example of a suds regulating materials are organic solvents, hydrophobic silicas, silicone oils and hydrocarbons.
An alternative suds regulating material comprises a mixed EO/PO nonionic surfactant. Suitable ethoxylated/prapoxylated nonionic detergents include the condensation product of aliphatic alcohols having from 8 to 22 carbon atoms in either straight or branched chain configuration with ethylene oxide and propylene oxide, such as a coconut oil ethylene oxide/propylene oxide condensate having from 2 to 15 moles in total of ethylene oxide and propylene oxide per mole of coconut alcohol. It is preferable that the mole ratio of ethylene oxide to propylene oxide lies in the range 1:5-5:1.
Particularly preferred ethoxylated/propoxylated nonionics include molecu7.es of the general formula:
r R(EO)n(PO)mH
wherein: R is an alkyl residue having an average carbon chain length of C8-C:14, preferably C9-C12, EO is an ethylene oxide residue, n is 1.-10, PO is a propylene oxide residue and m is 1-5. A particularly preferred material is C9-11 5-8E0 1-3P0, most preferably C9-11 6E0 2P0.
The amount of ethoxylated/propoxylated nonionic detergent active to be employed in the composition of the invention will generally be from 2 to l0~wt, and most preferably from 3-6~wt.
Preferred ratios of the ethoxylated to the ethoxylated/prc>poxylated surfactant fall into the range 4:1-2:1 with the et:hoxylated surfactant being present in weight excess over the' ethoxylated/ propoxylated surfactant.
Compositions according to the invention can also contain, in addition to the' ingredients already mentioned, other optional ingredients such as pH regulants, sunscreens, colourants, optical brighteners, soil suspending agents, enzymes, compatible bleaching agents, gel-control agents, freeze-thaw stabilisers, additional biocides, preservatives, detergent hydrotropes, perfumes and opacifiers.
Hydrotropes, are useful optional components. It is believed that the use of: hydrotropes enables the cloud point of the _ compositions to be raised without requiring the addition of anionic surfactants.
Suitable hydrot:ropes include, alkali metal toluene sulphonates, urea, alkali metal xylene and cumene sulphonates, short chain, preferably CZ-CS alcohols and glycols. Preferred amongst these hydrotropes are the sulphonates, particularly the cumene and toluene sulphonates.
Typical levels of hydrotrope range from 0-5~ for the sulphonates. Correspondingly higher levels of urea and alcohols are required. Hydrotropes are not generally required for dilute products.
Given that the compositions of the invention effectively comprise a means for deposition of a surfactant/polymer complex at the surface being cleaned, it is envisaged that the compositions of the invention can further comprise components which it is desirable to deposit upon a surface. Three preferred classes of additional components are perfumes, non-cationic surfactant antimicrobial components and insect repellents and/or insecticides.
Given that the compositions of the invention already comprise a cationic surfactant and are alkaline, some antimicrobial activity is already found in the compositions. Suitable additional non-cationic non-surfactant antimicrobial components are known in the art. Typical examples of this class of materials includes antimicrobial perfume oils and oil components.
Typical levels of the non-cationic antimicrobial agent in formulations range from 0.01 to 8~, with levels of 0.05-4wt~, particularly around 2~ being preferred for normal compositions and up to two or four times that concentration being present in so called, concentrated products. For sprayable products the concentration of the antimicrobial agent will be in the range 0.05-0.5$wt.
Particularly suitable insect repellents include essential oils such as those of genus Mentha, particularly Mentha arvensis, mentha piperita, Mentha spicata and Mentha cardica; Lemongrass East Indian oil, Lemon oil, Citronella, Cedanvood and Pine oil; terpenoids, particularly limonene, carvone, cineole, linalool, Gum Camphor, citronellal, alpha and beta terpenol, fencholic acid, borneol, iso borneol, bornyl acetate and iso bornyl acetate. The most preferred insect repellants are the terpenoids, particularly limonene. Of the above-mentioned oils many are known to show antimicrobial effects as well as being insect repellents and/or perfumes.
The level of insect repellent required will vary with the nature of the material used. For essential oils and terpenoids, preferred levels are 0.1-5~ on product.
It is preferable that the compositions of the present invention are essentially free of abrasive particles.
The preferred pH of the neat products is 7-12 with a pH in the range of 7-11 being more preferred and a pH of around 10-11 being particularly preferred so as to balance cleaning and hygiene effectiveness.
Particularly preferred compositions according to the present invention are mobile aqueous liquids, having a pH of 7-12 (preferably 7-11) which comprise:
a) 5-20~wt of a ethoxylated, 2-15E0, C8-C18 alcohol, nonionic surfactant, b) less than l~wt of anionic surfactants, c) 0.2-2~wt of a water soluble, anionic polymer having an average molecular weight less than 1,000,000, said polymer being a polymer of at least one of acrylic acid, methaczylic acid or malefic anhydride, with at least one of acrylic acid, methacrylic acid, malefic anhydride, ethylene, styrene and methyl vinyl ether, and , d) 0.05-5~wt (preferably 0.05-2$wt) of a cationic surfactant which is a quaternary nitrogen compounds of the general formula R1RZR3R9N'X-, where R1 and R2 are the same or different C1-C4 alkyl or hydroxy alkyl, R3 is a C6-C22 alkyl, alkaryl or hydroxyalkyl, R4 is a Cl-C22 alkyl, alkaryl or hydroxyalkyl and X is a monovalent anion equivalent, and, e) not more than 2~ of a solvent selected from the group comprising di-ethylene glycol mono n-butyl ether, mono-ethylene glycol mono n-butyl ether, propylene glycol n-butyl ether and mixtures thereof.
More particularly preferred compositions according to the invention are as described in the above paragraph but contain a cationic surfactant which has antimicrobial properties (such as benzalconium chloride) and a metal ion bing agent which is an organic acetate. These compositions exhibit improved primary and secondary cleaning at high pH as well as having effective and persistent antimicrobial properties against a broad range of microbes.
Compositions can be n~nufactured which comprise an essentially dry powder and which form the compositions of the invention on the addition of water.
In order that the present invention may be further understood it will be described hereafter by way of the following non-limiting examples.
In all the cleaning examples described below a specified level (based on non-volatiles) of soil were deposited on an 'A4' sized area of °DECAMEL' (RTM ex Formica) test surface by spraying. The soil comprised 1~ glycerol tripalmitate, 0.5~
glycerol triolE~ate, 0.5~ kaolin, 0.2~ liquid paraffin, 0.1~
palmitic acid, 0.02 carbon black in methylated spirits. The soil was allowESd to age for a specified time at room temperature prior to cleaning. The initial effort required to clean the surface is referred to below as the primary cleaning effort.
44here secondary cleaning benefits were examined, in order to investigate the' anti-resoiling performance, the DECAMEL sheets were pretreated with the test composition and copiously rinsed prior to soiling. The effort required to clean the re-soiled surfaces is known as the secondary cleaning effort.
In both primanr and secondary cleaning the total effort used to remove the soil from the test surface using a cellulosic sponge cloth was measured using a rig fitted with force measuring mean, to determine the total effort applied to the surface. Due i~o variability in the experimental conditions, in the data which follows results should not be compared between series of experiments presented in different tables.
Formulations comprised nonionic surfactant and water with and without polymer and with and without cationic surfactant.
The nonionic surfactants employed were DOBANOL 91-5 [TM] (C9-C11 alkyl, 5 EO alkyl ethoxylate ex. Shell) and DOBANOL 91-8 [TM] (C9-C11 alkyl, 8 EO alkyl ethoxylate ex. Shell). The polymers illustrative of the present invention were a WO 98!40452 PCT/EP98/01273 polyacrylic acid (VERSICOL E11 [TM] ex Allied Colloids) which had an average molecular weight of 250,000 Daltons. The cationic surfactants used were C"-alkyl trimethyl ammonium bromide (C~TAB: where n is 12,14 and 16), dicetyldimethyl and tricetylmethyl ammonium bromides (DTAB and TTAB respectively).
The pH of the compositions was regulated with sodium hydroxide or a carbonate/bicarbonate buffer system as indicated.
Example 1a-ld in Table 1 below show the primary cleaning effort required using compositions which contained the formulations given, on the soil given above, aged for a period of two days after application of the soil at a coverage of 0 . 5mg / cm2 .
Table 1 la 1b is 1d Dobanol 91-5 7~ 7~ 7~ 7~
Cetyl TAB - - 1$ 1~
Versicol E11 - 0.5~ - 0.5~
Carbonate/bicarbonate pH9 pH9 pH9 pH9 -Cleaning Effort (N/s) 1036 ~ 769 68 412 ~
From table 1 it can be seen that the primary cleaning effort is minimised at alkaline pH in the presence of both the cationic surfactant and the polymer (example 1d), while higher effort is required if either or both of these components is absent (compare with comparative examples 1a, lb and lc). It is believed that this is due to the formation of a WO 98/40452 PG"f/EP98/01273 polymer/surfact.ant complex which increases the surfactant concentration a.t the surface.
Table 2 below ~,hows the effect of the cationic type on primary cleaning effort.. Experiments were performed on the soil given above aged for a period of one day after application of the soil at a coverage of 0.25mg/cni.
aP
Lf101 N
N oxo ap x ~r r~ I 1 ,~ o t1,~r dP dP x M
l~ I I e--i1 (7~c~
'' w N as ao In x I ~ 1 o p, vo x L~ W -1 I 1 G~,~-I
b N
x o.
W -I 1 I O (~ M
o U
O~ N
N ~ ~ ~ x ~ 1 I I ~
a~
,4 d~ 00 n a~ o y x 1 1 1 o p, ,-1 N
x L' I I I I ~
z 0o rl o ~1 1 r--I1~ W
w w o -~1a -~ o 0o c>aas m ~1 b E
A v a x a n n n ~ ~ ~ i ~ JI
From table 2 it can be seen that compared with the control (comparative example 2a) primary cleaning effort is in all cases markedly :reduced by the combination of surfactant, polymer and cationic (examples 2d, 2f and 2h) as compared with systems in which only the cationic is added (comparative examples 2c, 2e and 2g). Addition of the polymer alone, in the absence of 'the cationic surfactant, (comparative example 2b) gives no si~~nificant reduction in primary cleaning effort at this pH. It can be seen that of the different cationics used the TTAB and CTAB materials give the lowest cleaning effort.
Table 3 below further illustrates the effect of pH for compositions which comprise 7~ Dobanol 91-5 and 0.5~ Versicol E11 in the presence of differing levels of CTAB at the pH
indicated. pH was regulated with hydroxide and the experiments were performed on the soil given above aged for a period of one day after application of the soil at a coverage of 0.25mg/cm2. Results are given in total primary effort to clean in N/s.
Table 3 3a 3b 3c pH pH6 pH8 pHlO
0~ CTAB 213 262 -25~ CTAB 163 195 193 0.5~ CTAB 142 180 175 1~ CTAB 151 131 190 From Table 3 it can be seen that through this pH range the primary cleaning effort generally fails as the level of the cationic surfactant level is increased.
Table 4 below provides additional data on the effect of pH for compositions which comprise 8~ active in total and 0.5~
Versicol E11 in the presence of differing levels of CTAB (C) and DTAB (D) at the pH indicated. The non-cationic active material is Dobanol 91-5. pH was regulated with hydroxide and the experiments were performed on the soil given above aged for a period of one day after application of the soil at a coverage of 0.25mg/ciri. Results are given in total primary cleaning effort in N/s.
Table 4 4a 4b 4c 4d pH pH4 pH7 pH4 pH7 type of cationic C C D D
0.00 cationic 162 749 162 749 0.13 cationic 171 399 171 308 0.25 cationic 188 288 173 227 0.50 cationic 190 403 162 269 From Table 4 it can be seen that compositions show poor cleaning performance at the higher pH unless the cationic surfactant is present. In the lower pH range (examples 4a and 4c) the effect disclosed in WO 94/26858 is believed to be acting to reducEa the primazy cleaning effort requirement and there is no significant effect of adding cationic (if anything the compositions get slightly worse) although useful cleaning results are still attained.
In the higher pFi range (examples 4b and 4d) it can be seen that the addition of cationic surfactant significantly lowers the cleaning efi_ort and enables the nonionic/polymer systems to achieve similar results to those obtained in more acidic products.
Table 5 below show the effect on the primary cleaning energy effort requirement and the cloud point of modifying the nonionic surfactant present. The compositions comprise 7~ of a mixture of Dobanol 91-5 and Dobanol 91-8, 1~ CTAB and 0.5~
Versicol E11. ~f'Ihe table lists the percentage of Dobanol 91-8 in the nonionic portion of the surfactant mixture, the remainder of the: mixture being the Dobanol 91-5.
Table 5 ~ ~~obanol 91-8 Effort (N/s) Cloud Point I
5a 0 331 30 5b 25 401 42.5 5c 50 479 53 5d 75 809 64 5e 100 876 75 From Table 5 it can be seen that the compositions which are rich in the Dobanol 91-5 surfactant (for example 5a) give the best reduction in primary cleaning effort, whereas while the compositions which are rich in Dobanol 91-8 (for example 5e) also give a useful reduction in primary cleaning effort this is less marked than for the other surfactant. It is clear from the table that the selection of an appropriate combination of surfactants enables the cloud point of the compositions to be controlled.
Table 6 below shows the effect on the secondary cleaning effort requirement in subsequent cleaning cycles for the compositions of the invention, using two different cationics.
The 'VARI' material is Varisoft 442-100P (TM: ex. Sherex-Inlitco) a dihardened tallow dimethyl ammonium chloride.
Table 6 6a 6b 6c 6d CTAB CTAB VARI VARI
primary recoiled primary recoiled pH6 886 203 846 364 pH8 679 257 745 460 pHlO 969 426 958 602 pHl2 637 211 501 408 From Table 6 it can be seen that in all cases the surfaces proved more easy to clean in the second cleaning cycle (compare 6a with 6b and compare 6c with 6d). It is believed that this demonstrates that the one or more components of the composition are being deposited on the surface and leaving a residual film which either retards the attachment of soil or aids in its removal, i.e. the secondary cleaning effort after re-soiling of the surfaces is reduced.
The above examp7Les illustrate how the compositions of the present invention enable a reduction of both primary and secondary cleaning effort over a broad pH range.
Table 7: below :shows the result of a biocidal efficacy test using the following bacteria (from the National Collection of Type Cultures oi: American Type Culture Collection). Cultures were maintained on beads in a cryopreservative at -80/C.
Staphylococcus ~3ureus NCTC 10788 Pseudomomas aeruginosa ATCC 15442 Saccharomyces cesrevisiae ATCC 9763 To prepare inocc:ulum a bead was removed from the storage vial and aseptically transferred to 100m1 Nutrient Broth and incubated at 37/C in a shaking waterbath for 24 hours (bacteria). After incubation, the culture suspensions were aseptically transferred into two 50m1 centrifuge tubes and centrifuged at 21808 for 10 minutes (Mistral 1000, MSE) in order to harvest: the cells. The supernatants were poured off and the pellets resuspended in peptone diluent (0.1 percent peptone and 0.8'_> percent sodium chloride, pH 7.0). The suspensions were: kept at 4/C until needed, and before use in the test were lE:ft on the bench at ambient temperature for at least 30 minute:.
The test used was a microtitre plate assay, which is comparable to 'Method for the test for the antimicrobial activity of disinfectants in food hygiene', more commonly known as the European Suspension Test (EST). Bovine albumin at a low level (0.03 percent) or a high level (0.3 percent) was included in some of the tests. A 1/15 dilution of the formulation was made in 'Water of Standard Hardness' as referred to in the above method.
Microtitre plates (Bibby Sterilin, sterile 96-well, flat-bottom) were prepared by adding 270m1 quenching solution in row B of each plate and 270m1 peptone diluent into rows C-G.
The quench solution was composed of Tween 80 (3.0 percent), lecithin (0.3 percent), L-histidine (0.1 percent), sodium thiosulphate (0.5 percent) and 0.25N KHZPO9buffer (1 percent) in sterile distilled water (1 litre). Sterile distilled water or bovine albumin as appropriate (120m1) was added to the test wells of row A. Then the formulation (150m1 1/I5 dilution) was added to the appropriate test wells. The formulations were randomised across the plates. The plates were placed on a stainless steel 'plate incubator' tray attached to a circulating waterbath, held at 20/C.
An aliquot of microbial suspension (30m1) was then added simultaneously to all the wells of row A of the microtitre plate using a multichannel pipette. The test mixture was left at 20/C for a contact time of 5 minutes ~ 5 seconds, after which time an aliquot (30m1) was transferred into row B
(quench), giving a 10-' dilution. After 5 t 1 min, an aliquot (30m1) was transferred to row C (peptone diluent). Further serial dilutions were performed in the same manner until row G
(10-6 dilution). The bacteria were enumerated using the Miles-Misra technique. Three aliquots (10m1) from each dilution were spotted onto pre-dried Tryptone Soya Agar plates which had been divided into 6 sectors. The spots were allowed to dry and the plates incubated at 37/C for 24 hours. Plates were counted by selecting a dilution segment with 3-50 cfu per spot and the average of the 3 spots was calculated. The decadic logaritlun of this number was calculated and subtracted from the decadic logarithm of the initial count to give the log (reduction).
All formulation's contained Dobanol 91-8 (8 percent) and polymer (polyac:rylic acid 0.5wt percent), and were adjusted to pH9. Formulations were diluted 1/30 in test in presence of WSH (water of standard hardness) and soil (bovine albumin).
Examples are provided both for formulations containing CTAB
and benzalkoniw:n chloride.
ORGANISM CTAB BAAC (%) MEAN LOG
(REDUCTION) (%) (2 replicates) LOW BOIL HIGH
SOIL
1.0 - 4.5 4.7 Staph. aureus 2.0 - 7.4 7.6 - 1.0 7.2 7.2 - 2.0 7.2 7.2 1.0 - 0.1 0.03 Pseudomonas aeruginosa 2.0 - 0.04 0.01 - 1.0 2.3 2.6 - 2.0 3.5 3.1 1.0 - 4.4 3.5 Saccharomyces cerevisiae 2.0 - 7.0 2.7 - 1.0 6.0 6.0 - 2.0 6.0 6.0 From the results. given in Table 7 it can be seen that the levels of cationic used in the compositions of the present invention are sufficient to give a biocidal effect. Tt can also be seen that benzalkonium chloride has an improved biocidal effect even against the normally recalcitrant Pseudomonas aeruginosa.
In order to show the effect of sequesterant in improving bacterial kill, formulations were prepared which contained Dobanol 91-8 (7wt percent) and polymer (VERSIC(7L E11 polyacrylic acid. 0.5wt percent), and were adjusted to pH2l.
Formulations were diluted 1/20 in the presence of WSH (water of standard hardness) and 0.03 soil (bovine albumin) on final suspension. Examples are provided for formulations containing benzalkonium chloride (BAC) at both 1.0 and 2.0 wt~.
Sequesterant, either EDTA or MGDA was used as indicated in table 8. The test bacteria was Pseudomonas aeruginosa ATCC
15442, and assays were conducted as described above. Examples which give a log reduction greater than 5 are indicated in bold.
HAC EDTA MC3DA Log % % % Reduction 1 0.5 0 1.22 1 1 0 1.1 1 1.5 0 5.54 1 2 0 5.66 1 2.5 0 5.66 2 0.5 0 1.86 2 1 0 2.17 2 1.5 0 5.66 2 2 0 5.3 2 2.5 0 5.66 1 0 0.5 0.89 1 0 1 1.23 1 0 1.5 1.44 1 0 2 4.57 1 0 2.5 5.42 2 0 0.5 1.7 2 0 1 ' 2.95 2 0 1.5 3.46 2 0 2 5.48 I
2 0 2.5 5.74 The results givs:n in Table 8 show that a log five reduction in viable counts can be obtained by use of appropriate levels of sequestering agents .
In order to demonstrate the advantages of longer lasting hygiene which accrue with the compositions of the present invention, formulations were prepared which contained Dobanol 91-8 (7wt percent) with and without polymer (VERSICOL E11 polyacrylic acid 0.5wt percent), and were adjusted to pHll.
Formulations were diluted 1/20 in the presence of WSH (water of standard hardness) and 0.038 soil (bovine albumin) on final suspension. Examples are provided for formulations containing benzalkonium chloride (BAAC) at both 1.5 and 2.0 wt~.
Sequesterant, either EDTA or MGDA was used as indicated in table 9.
Efficacy was determined against Staphylococcus aureus NCTC
6538 by means of the method set out below.
Glazed ceramic t=files squares (size = 2.5x2.5cm, were cut from plain blaclt glazed Cristal (TM) tiles, ex H & R Johnson with all sloping edges removed. The tiles were cleaned rigorously before application of the test solution or product, so than a uniform coverage on a hydrophilic surface is obtained. Cleaning is undertaken on the day that application of product, and rinsing is carried out no longer than 24 hrs before microbiological testing is undertaken.
Tiles were cleaned by applying calcite powder to the tile and rubbing vigorously with a clean, damp sponge cloth.
Tiles are rinsed with de-ionised water and it was determined if the tile was hydrophilic all over by allowing a small amount of water to run over it. The water should run smoothly over the tile and form an even film over the entire surface. If an5r area remained hydrophobic calcite was re-applied and the cleaning process repeated. After cleaning, tiles were dried by wiping with a clean paper tissue (Kimsoft (TM) facial tissue).
50u1 of cleaning product (whether a formulation according to the invention, a control or a comparative example) was placed on a clean tile and carefully spread it over the whole tile surface using a flattened micropipette tip. The tile was allowed to dry in a 30oC incubator then any rinses were carried out by placing each tile in 100m1 of sterile WSH for 30 seconds, removing and placing in a 30oC incubator to dry.
After treatment with the products according to the invention, comparative examples or controls the tiles were stored in a microbiological safety cabinet to limit contamination.
In order to demonstrated the substantive antibacterial effect, each product was tested in duplicate, using 50u1 of sterile distilled water as the control formulation for control tiles. At time zero tiles treated according to the present invention were inoculated together with a control tile with 20u1 of culture (as described above) so that there were approximately 2x10 bacteria/tile in a 0.03 Bovine Albumin soil. The bacteria were spread over the whole tile area using a sterile spreader. After 30 minutes contact time between the bacteria and the tiles, a sterile microbiological cotton swab was wet with quench solution and swabbed thoroughly over the tile in two directions at right angles to each other. The end off the swab was broken off into l0ml of quench solution and the process repeated with a dry swab to remove residual liquid and bacteria. Quench bottles were left for 30 minutes to allow for recovery of injured cells (60 minutes for E. coli). After recovery each quench bottle was vortexed for 15 seconds at high speed to resuspend the cells evenly in the quench solution.
For each tile being tested, a column of wells in a sterile microtitre plate was inoculated with 270u1 of Peptone water, leaving the first well empty in each case. The first well was filled with 300u1 of the quenched swab solutions. A
further 500u1 o:f quenched swab solution was plated directly onto an agar plate and spread using a sterile spreader.
This plate is used for enumerating low levels of survivors.
Serial 10-fold dilutions of the solutions were prepared by transferring 30~a1 of solutions in row 1 to row 2; mixing them, then repeating the procedure down to row 6 so that a 10-6 dilution i;s achieved (pipette tips are changed between transfers).
For each tile sample taken an agar plate (dried plate face down with the l:id off in a 60oC oven for 15 minutes prior to use and marked :into 6 equal segments on its base with a marker pen) was spotted with 10u1 volumes of liquid onto the appropriate segment of the plate, placing 3 spots per segment. All plates were left face up to dry and then placed face down in an incubator at 37oC for 24 hrs. Counts were obtained for the plates and 1og10 reduction obtained by subtracting the 1og10 count[test] from 1og10 count[control].
Results for such a test are shown in table 9 below: all composition contained soil and nonionic surfactant as noted above and the other components of the neat cleaning composition are indicated in the table. As noted above, log reductions are calculated relative to controls which had been treated with sterile water rather than a 'cleaning' composition.
Example BAAC% Polymer% EDTA% MC3DA% Log Red Log Red.
Rinsed Unrinsed 9a 1.5 0.5 - 2.5 1.41 3.49 9b 1.5 - - 2.5 1.01 4.02 9c 1.5 0.5 1.5 - 1.80 3.87 9d 1.5 - 1.5 - 0.35 4.02 9e 2.0 0.5 - 2.5 2.18 4.02 9f 2.0 - - 2.5 0.38 4.02 ~9g 2.0 0.5 1.5 - 2.67 4.02 9h 2.0 - 1.5 - 0.01 2.48 From the results in table 9 it can be seen that bacteria recovered from a surface which had been previously treated with a composition according to the invention (9a, 9c, 9f or 9h) had a significantly reduced viability of between 2-4 logs when the surface was not rinsed. This reduction in viability would be expected given that the surfaces had been exposed to a biocide-containing solution which had been allowed to dry on the surface.
For the tiles which had been rinsed, only those treated with formulations which contained polymer (9a, 9c, 9e and 9g) showed markedly better than 1 log reduction (90~) of the recovered bacteria. Formulations using 2~wt BAAC, polymer and sequesterant (9e and 9g) showed the best results in the example with a better than 99~ reduction in viable count.
It is believed that these results show that the compositions of the invention have a persistent antimicrobial effect as compared with the polymer free control compositions.
Plastic Petri dishes (9cm diameter, 2cm depth) were treated with 20m1 of test product at the recommended dilution (1:20, 30 min, room temperature), before decanting the solution and allowing plates to dry. Control plates were untreated.
Prior to dilution the example formulation (10a) contained Dobanol 91-8 (7~~wt) with polymer (VERSICOL E11 polyacrylic acid 0.5~wt), cationic surfactant (2gwt BAAC) and sequesterant (2.5~wt MGDA) and was adjusted to pHl1 with NaOH. Comparative examples were also performed against Lysoform (TM) a commercially available disinfectant product.
A suspension of Aspergillus niger spores (ATCC 6275).
prepared in sterile distilled water, was introduced to the plates (20m1 per plate, 3 x 105 spores/ml). Plates were agitated in an orbital shaker to distribute spores evenly (1 min, 100 rpm) and left standing at room temperature for 30 min, before re-agitating (1 min, 100 rpm). Supernatants were discarded and the plates allowed to dry. As the plates had been allowed to dry after pretreatment and prior to exposure to the spores, the spores had not been exposed to relatively high. levels of the pre-treatment compositions.
Initial attachment of spores to the treated and untreated plates could then be determined by the method given below.
To show the effect of rinsing, duplicate dishes which had been treated as above (including the exposure to mould spores) were subjected to rinsing by introducing standard hard water (lOml) into each dish and mixing (1 min, 100rpm).
The supernatant was discarded and the plates dried at room temperature.
To show the effect of scrubbing duplicate dishes which had been inoculated with spores as described above were scrubbed using an epicyclic scrubbing device. Scrubbing of the surface was achieved through the use of standard, pre-washed sponge cloths, dampened with standard hard water, at a fixed pressure of 80g/cm2, (10 cycles, speed 4). Dishes were then allowed to dry at room temperature as before.
Each of the above plates was viewed under light microscopy (x40 magnification) and the average number of attached spores determined from each of five pre-defined fields of view. Plates from the rinsing and scrubbing experiments were re-counted and the numbers of spores recorded. The percentage attachment following each of the treatments was calculated by the equation:
AveraSxe no. spores countP~ x 100 Average no. spores on untreated control Results are given in table 10 below, a percentage of spores attached as compared with an untreated surface Initial Attachment Attachment after Attachment after rinsing Scrubbing 10a 45.05 32.67 5.41 Lysoform (TM) 64.26 53.07 14.74 Control 100.00 77.53 38.83 As expected, thE: results show that for untreated surfaces rinsing and scrubbing remove some mould spores, but leave almost 40~ of the spores on the surface even after scrubbing. The results show that spores are less likely to attach to a suri:ace treated with the compositions of the present invention, and, when spores do attach, they are not as strongly bound to the surface.
Statistical ana7Lysis of the data showed a significant decrease (95~ confidence) in the percentage of spores which attached to the surface in the presence of the polymer-containing formulation, compared to the reference product Lysoform (RTM) and as compared with untreated surfaces. As noted above, this difference was seen at each stage of treatment.
It is believed that these results show that the compositions of the invention at least partly prevent the adhesion of spores to a suri:ace and consequently, it is believed that the use of a composition according to the present invention would reduce thE~ rate of regrowth on a clean surface of micro-organisms including moulds or bacteria which propogate through spores.
~!~: c~~; 1.:, ;
The water soluble polymer is an essential component of the compositions according to the present invention.
As noted above the polymers according to the invention are water soluble polymers having an average molecular weight of less than 1000000, and being free of quaternary nitrogen groups. Typically, these polymers are polymers bearing carboxylate functional groups although the use of other anionic polymers is not excluded. In the context of the present invention, anionic polymers are those which carry a negative charge or similar polymers in protonated form.
Mixtures of polymers can be employed.
The preferred polymers in embodiments of the present invention are those which are readily available in the marketplace.
These are polymers of acrylic or methacrylic acid or malefic anhydride, or a co-polymer of one or more of the same either together or with other monomers.
Particularly suitable polymers include polyacrylic acid, polymaleic anhydride and copolymers of either of the aforementioned with ethylene, styrene and methyl vinyl ether.
The most preferred polymers are malefic anhydride co-polymers, preferably those formed with styrene, acrylic acid, methyl vinyl ether and ethylene.
Preferably, the molecular weight of the polymer is at least, 5000, more preferably at least 50,000 and most preferably in excess of 100,000. VERSICOL E-11 [RTM] (ex. Allied Colloids) which is a polyacrylic acid, has been found to be a suitable polymer for use in compositions according to the invention.
Typically, the surfactant based cleaning compositions comprise at least O.Olwt'~ polymer, on product. The positive benefit of the presence of polymer as regards the improvement in cleaning properties can :be identified even when very low levels of polymer and surfactant are present. This property of a low concentration threshold is particularly advantageous in applications of the invention where considerable dilution is expected, such as in floor cleaning.
Preferably the level of polymer is 0.05-S.Owt~ at which level the anti-resailing benefits become particularly significant.
More preferably 0.2-2.Owt~ of polymer is present. We have determined that higher levels of polymer do not give significant further cleaning advantages with common dilution factors, while increasing the cost of compositions. It is believed that high levels of polymer increase the viscosity of the product and. hinder product wetting and penetration of the soil. However, for concentrated products which are significantly dliluted prior to use, the initial polymer level can be as high as 5$wt.
As mentioned ax>ove, the molecular weight of the polymer is preferably belt>w 1 000 000 Dalton. It is believed that as the molecular weight increases the cleaning benefit of the polymer - is reduced.
_ g _ It is essential that compositions according to the present invention comprise at least one nonionic surfactant.
The composition according to the invention comprise detergent actives which can be chosen from commercially available nonionic detergent actives. Suitable nonionic detergent active compounds can be broadly described as compounds produced by the condensation of alkylene oxide groups, which are hydrophilic in nature, with an organic hydrophobic compound which may be aliphatic or alkyl aromatic in nature.
Alkoxylated alkanols are particularly preferred.
The length of the hydrophilic or polyoxyalkylene radical which is condensed with any particular hydrophobic group can be readily adjusted to yield a water-soluble compound having the desired degree of balance between hydrophilic and hydrophobic elements. In general, the compounds will be alkoxylated alcohols having C8-C22 alkyl chains and 1-20 molar equivalents of ethylene oxide and/or propylene oxide residues attached thereto.
Particular examples include the condensation product of aliphatic alcohols having from 8 to 18 carbon atoms in either straight or branched chain configuration with 2-15 moles of ethylene oxide. Examples of such materials include a coconut oil ethylene oxide condensate having from 2 to 15 moles of ethylene oxide per mole of coconut alcohol; condensates of alkylphenols whose alkyl group contains from 6 to 12 carbon atoms with 5 to 25 moles of ethylene oxide per mole of alkylphenol. -The preferred nonionic surfactants are the condensation products of 9-15 carbon alcohols with 3-10 moles of ethylene oxide. In embodiments of the invention we have found that _ g _ DOBANOL [RTM] series ethoxylated alcohol nonionic surfactants (ex. Shell) are suitable. Preferred materials include DOBANOL
91-5 [TM) (C9-C11 alkyl, 5 EO alkyl ethoxylate ex. Shell) and DOBANOL 91-8 (TM] (C9-C11 alkyl, 8 EO alkyl ethoxylate ex.
Shell).
It is possible to use mixtures of nonionic surfactants. As will be described in more detail below these mixed systems have some advantages in antifoaming the products.
Alternative nonionic surfactant materials which are envisaged include condensates of the reaction product of ethylenediamine and propylene oxide with ethylene oxide, the condensates containing from 40 to 80~ of polyoxyethylene radicals by weight and having a molecular weight of from 5,000 to 11,000;
tertiary amine oxides of structure R3N0, where one group R is an alkyl group of 8 to 18 carbon atoms and the others are each methyl, ethyl or hydroxy-ethyl groups, for instance dimethyldodecylamine oxide; tertiary phosphine oxides of structure R3P0, where one group R is an alkyl group of from 10 to 18 carbon atoms, and the others are each alkyl or hydroxyalkyl groups of 1 to 3 carbon atoms, for instance dimethyldodecylphosphine oxide; and dialkyl sulphoxides of structure RZSO where the group R is an alkyl group of from 10 to 18 carbon atoms and the other is methyl or ethyl, for instance methyltetradecyl sulphoxide; fatty acid alkylolamides; alkylene oxide condensates of fatty acid alkylolamides a:nd alkyl mercaptans. In addition, it is believed that alkyl polyglycoside surfactants can be employed as the nonionic surfactant.
The amount of nonionic detergent active to be employed in the composition of the invention will generally be from 1 to 30~wt, preferably from 3 to l5~wt. Levels of above 15~ active show little increase in neat-use cleaning performance, although such higher levels can be employed in products intended to be considerably diluted prior to use. Typical compositions will comprise 5-l0~wt nonionic active on product.
Anionic surfactant can be present in relatively small proportions, however it is preferable that anionic surfactant is absent from composition. As described in further detail below small amounts of anionic detergents may be present in the form of soaps as part of an antifoam system. It is preferred that the compositions of the invention comprise less than 2~wt, preferably less than 1~ of anionic surfactant.
Typically the cationic surfactants are materials of the general formula RlRzR3R4N+X-, wherein all of the radicals are hydrocarbons with or without hydroxy substitution, at least one of the radicals R1-R4 is a C6-C22 alkyl, alkaryl or hydroxyalkyl, at least one of the radicals R1-R4 is a C1-C4 alkyl or hydroxy alkyl and X is a monovalent anion equivalent.
The cationic surfactants are preferably, quaternary nitrogen 2 0 compounds of the general formula R1RZR3R4N'X-, where R1 and R2 are the same or different C1-C4 alkyl or hydroxy alkyl, R3 is a C6-C22 alkyl, alkaryl or hydroxyalkyl, R4 is a C1-C22 alkyl, alkaryl or hydroxyalkyl and X is a monovalent anion equivalent.
Preferably X is a halogen, most preferably chloride or bromide.
Preferably R1 and R2 are methyl. In embodiments of the invention R3 is preferably C8-C18 alkyl, more preferably C10-C16 alkyl. In embodiments of the invention R4 is preferably -methyl, C8-C18 alkyl or benzyl. Thus, the cationic surfactants used can have three 'short chain' radicals such as methyl and one fatty-soluble 'long chain' radical or two 'short' chains and two fatty-soluble 'long chains', wherein the 'long chains' can be either linear or branched hydrocarbons or contain aromatic rings.
A further advantage of including a cationic surfactant in the compositions of: the invention is that preferred cationic surfactants confer antimicrobial properties on the formulation. :surprisingly, we have determined that compositions according to the invention which contain antimicrobial c:ationic surfactants show longer lasting hygiene on surfaces which have been treated with the compositions.
Particularly suitable cationic detergent-active compounds include cetylti:imethyl amanonium bromide (CTAB), hardened di-tallow di-methyl ammonium chloride (available in the marketplace as BARDAC 2250), benzalkonium chloride and mixtures thereof.
The cationic surfactants which comprise one aryl substituent are especially preferred as they are believed to give particularly good antimicrobial effects.
Typical levels of cationic surfactant will lie in the range of 0.05-3~wt on product. Preferred levels of cationic surfactant are around 1-3~wt.
The total amount of detergent active compound to be employed in the detergent composition of the invention will generally be from 1.5 to 30~, preferably from 2 to 20~ by weight, most preferably from 5-20wt~.
Solvents may be present in the compositions of the invention.
It is preferred that the compositions of the present invention comprise not more than 2~wt of solvents of the general formula:
Rl- 0 - ( E 0 ) m- ( PO ) n-R2 , wherein R1 and RZ are independently C2-6 alkyl or H, but not both hydrogen, m and n are independently 0-5. It is believed that the use of polymers in compositions according to the present invention can offset the otherwise deleterious effects of any solvent which is present when the product is used on certain plastics materials.
More preferably, no more than 2$wt of solvent selected from the group comprising di-ethylene glycol mono n-butyl ether, mono-ethylene glycol mono n-butyl ether, propylene glycol n-butyl ether and mixtures thereof is present. Advantageously, effectively no solvent other than water is present.
Fetal ion binding agents Preferably the composition contain either detergent builders or non-building metal ion sequesterants, collectively these are known as metal ion binding agents.
Suitable metal ion binding agents include nitrilotriacetates, -polycarboxylates, citrates, dicarboxylic acids, water-soluble phosphates especially polyphosphates, mixtures of ortho- and pyrophosphate, zeolites and mixtures thereof. Such agents can additionally function as abrasives if present in an amount in excess of their solubility in water as explained herein. In general, where the metal ion binding agent is a builder it will preferably will form from 0.05 to 25~ by weight of the composition.
Metal ion binding agents such as ethylenediaminetetraacetates (e.g. EDTA), amino-polyphosphonates (e.g. those available as the 'DEQUEST' (TM) series of materials) and phosphates and a wide variety o:f other poly-functional organic acids and salts (including materials such as methyl glycine diacetate (MGDA)), can also optionally be employed.
A particular, further advantage of including metal ion binding agents, preferably organic acetates, more preferably MGDA or EDTA is believed to be that the microbiocidal properties of the cationic surfactants are improved especially against Gram-negative bacteria particularly under hard water conditions.
Preferred levels of metal ion binding agents are 0.05-5~wt, preferably 0.1-3.O~wt, most preferably 1.5-3~wt. In preferred compositions containing around 2~ cationic surfactant, 1.5-3~
of an organic acetate sequesterant will give a log five reduction in viable bacteria even against recalcitrant bacterial strains such as Pseudomomas aeruginosa.
Preferred compositions according to the invention contain 1.5-3~wt of MGDA or EDTA.
In addition to the cleaning benefit we have determined that the formulation containing polymer, alcohol, ethoxylate, - cationic surfactant and sequestering agent has the additional benefit that it reduces the adhesion of fungal and/or bacterial spores to surfaces. This is described in further detail below with reference to examples.
The composition according to the invention can contain other ingredients which aid in their cleaning performance and general utility.
Typically, a further optional ingredient for compositions according to the invention is a suds regulating material, which can be employed in compositions according to the invention which have a tendency to produce excessive suds in use. One example of a suds regulating material is soap.
Soaps are salts of fatty acids and include alkali metal soaps such as the sodium, potassium, ammonium and alkanol ammonium salts of higher fatty acids containing from about 8 to about 24 carbon atoms, and preferably from about 10 to about 20 carbon atoms. Particularly useful are the sodium and potassium and mono-, di- and triethanolamine salts of the mixtures of fatty acids derived from coconut oil and ground nut oil. When employed, the amount of soap can form at least 0.005, preferably 0.5~ to 2~ by weight of the composition.
Further example of a suds regulating materials are organic solvents, hydrophobic silicas, silicone oils and hydrocarbons.
An alternative suds regulating material comprises a mixed EO/PO nonionic surfactant. Suitable ethoxylated/prapoxylated nonionic detergents include the condensation product of aliphatic alcohols having from 8 to 22 carbon atoms in either straight or branched chain configuration with ethylene oxide and propylene oxide, such as a coconut oil ethylene oxide/propylene oxide condensate having from 2 to 15 moles in total of ethylene oxide and propylene oxide per mole of coconut alcohol. It is preferable that the mole ratio of ethylene oxide to propylene oxide lies in the range 1:5-5:1.
Particularly preferred ethoxylated/propoxylated nonionics include molecu7.es of the general formula:
r R(EO)n(PO)mH
wherein: R is an alkyl residue having an average carbon chain length of C8-C:14, preferably C9-C12, EO is an ethylene oxide residue, n is 1.-10, PO is a propylene oxide residue and m is 1-5. A particularly preferred material is C9-11 5-8E0 1-3P0, most preferably C9-11 6E0 2P0.
The amount of ethoxylated/propoxylated nonionic detergent active to be employed in the composition of the invention will generally be from 2 to l0~wt, and most preferably from 3-6~wt.
Preferred ratios of the ethoxylated to the ethoxylated/prc>poxylated surfactant fall into the range 4:1-2:1 with the et:hoxylated surfactant being present in weight excess over the' ethoxylated/ propoxylated surfactant.
Compositions according to the invention can also contain, in addition to the' ingredients already mentioned, other optional ingredients such as pH regulants, sunscreens, colourants, optical brighteners, soil suspending agents, enzymes, compatible bleaching agents, gel-control agents, freeze-thaw stabilisers, additional biocides, preservatives, detergent hydrotropes, perfumes and opacifiers.
Hydrotropes, are useful optional components. It is believed that the use of: hydrotropes enables the cloud point of the _ compositions to be raised without requiring the addition of anionic surfactants.
Suitable hydrot:ropes include, alkali metal toluene sulphonates, urea, alkali metal xylene and cumene sulphonates, short chain, preferably CZ-CS alcohols and glycols. Preferred amongst these hydrotropes are the sulphonates, particularly the cumene and toluene sulphonates.
Typical levels of hydrotrope range from 0-5~ for the sulphonates. Correspondingly higher levels of urea and alcohols are required. Hydrotropes are not generally required for dilute products.
Given that the compositions of the invention effectively comprise a means for deposition of a surfactant/polymer complex at the surface being cleaned, it is envisaged that the compositions of the invention can further comprise components which it is desirable to deposit upon a surface. Three preferred classes of additional components are perfumes, non-cationic surfactant antimicrobial components and insect repellents and/or insecticides.
Given that the compositions of the invention already comprise a cationic surfactant and are alkaline, some antimicrobial activity is already found in the compositions. Suitable additional non-cationic non-surfactant antimicrobial components are known in the art. Typical examples of this class of materials includes antimicrobial perfume oils and oil components.
Typical levels of the non-cationic antimicrobial agent in formulations range from 0.01 to 8~, with levels of 0.05-4wt~, particularly around 2~ being preferred for normal compositions and up to two or four times that concentration being present in so called, concentrated products. For sprayable products the concentration of the antimicrobial agent will be in the range 0.05-0.5$wt.
Particularly suitable insect repellents include essential oils such as those of genus Mentha, particularly Mentha arvensis, mentha piperita, Mentha spicata and Mentha cardica; Lemongrass East Indian oil, Lemon oil, Citronella, Cedanvood and Pine oil; terpenoids, particularly limonene, carvone, cineole, linalool, Gum Camphor, citronellal, alpha and beta terpenol, fencholic acid, borneol, iso borneol, bornyl acetate and iso bornyl acetate. The most preferred insect repellants are the terpenoids, particularly limonene. Of the above-mentioned oils many are known to show antimicrobial effects as well as being insect repellents and/or perfumes.
The level of insect repellent required will vary with the nature of the material used. For essential oils and terpenoids, preferred levels are 0.1-5~ on product.
It is preferable that the compositions of the present invention are essentially free of abrasive particles.
The preferred pH of the neat products is 7-12 with a pH in the range of 7-11 being more preferred and a pH of around 10-11 being particularly preferred so as to balance cleaning and hygiene effectiveness.
Particularly preferred compositions according to the present invention are mobile aqueous liquids, having a pH of 7-12 (preferably 7-11) which comprise:
a) 5-20~wt of a ethoxylated, 2-15E0, C8-C18 alcohol, nonionic surfactant, b) less than l~wt of anionic surfactants, c) 0.2-2~wt of a water soluble, anionic polymer having an average molecular weight less than 1,000,000, said polymer being a polymer of at least one of acrylic acid, methaczylic acid or malefic anhydride, with at least one of acrylic acid, methacrylic acid, malefic anhydride, ethylene, styrene and methyl vinyl ether, and , d) 0.05-5~wt (preferably 0.05-2$wt) of a cationic surfactant which is a quaternary nitrogen compounds of the general formula R1RZR3R9N'X-, where R1 and R2 are the same or different C1-C4 alkyl or hydroxy alkyl, R3 is a C6-C22 alkyl, alkaryl or hydroxyalkyl, R4 is a Cl-C22 alkyl, alkaryl or hydroxyalkyl and X is a monovalent anion equivalent, and, e) not more than 2~ of a solvent selected from the group comprising di-ethylene glycol mono n-butyl ether, mono-ethylene glycol mono n-butyl ether, propylene glycol n-butyl ether and mixtures thereof.
More particularly preferred compositions according to the invention are as described in the above paragraph but contain a cationic surfactant which has antimicrobial properties (such as benzalconium chloride) and a metal ion bing agent which is an organic acetate. These compositions exhibit improved primary and secondary cleaning at high pH as well as having effective and persistent antimicrobial properties against a broad range of microbes.
Compositions can be n~nufactured which comprise an essentially dry powder and which form the compositions of the invention on the addition of water.
In order that the present invention may be further understood it will be described hereafter by way of the following non-limiting examples.
In all the cleaning examples described below a specified level (based on non-volatiles) of soil were deposited on an 'A4' sized area of °DECAMEL' (RTM ex Formica) test surface by spraying. The soil comprised 1~ glycerol tripalmitate, 0.5~
glycerol triolE~ate, 0.5~ kaolin, 0.2~ liquid paraffin, 0.1~
palmitic acid, 0.02 carbon black in methylated spirits. The soil was allowESd to age for a specified time at room temperature prior to cleaning. The initial effort required to clean the surface is referred to below as the primary cleaning effort.
44here secondary cleaning benefits were examined, in order to investigate the' anti-resoiling performance, the DECAMEL sheets were pretreated with the test composition and copiously rinsed prior to soiling. The effort required to clean the re-soiled surfaces is known as the secondary cleaning effort.
In both primanr and secondary cleaning the total effort used to remove the soil from the test surface using a cellulosic sponge cloth was measured using a rig fitted with force measuring mean, to determine the total effort applied to the surface. Due i~o variability in the experimental conditions, in the data which follows results should not be compared between series of experiments presented in different tables.
Formulations comprised nonionic surfactant and water with and without polymer and with and without cationic surfactant.
The nonionic surfactants employed were DOBANOL 91-5 [TM] (C9-C11 alkyl, 5 EO alkyl ethoxylate ex. Shell) and DOBANOL 91-8 [TM] (C9-C11 alkyl, 8 EO alkyl ethoxylate ex. Shell). The polymers illustrative of the present invention were a WO 98!40452 PCT/EP98/01273 polyacrylic acid (VERSICOL E11 [TM] ex Allied Colloids) which had an average molecular weight of 250,000 Daltons. The cationic surfactants used were C"-alkyl trimethyl ammonium bromide (C~TAB: where n is 12,14 and 16), dicetyldimethyl and tricetylmethyl ammonium bromides (DTAB and TTAB respectively).
The pH of the compositions was regulated with sodium hydroxide or a carbonate/bicarbonate buffer system as indicated.
Example 1a-ld in Table 1 below show the primary cleaning effort required using compositions which contained the formulations given, on the soil given above, aged for a period of two days after application of the soil at a coverage of 0 . 5mg / cm2 .
Table 1 la 1b is 1d Dobanol 91-5 7~ 7~ 7~ 7~
Cetyl TAB - - 1$ 1~
Versicol E11 - 0.5~ - 0.5~
Carbonate/bicarbonate pH9 pH9 pH9 pH9 -Cleaning Effort (N/s) 1036 ~ 769 68 412 ~
From table 1 it can be seen that the primary cleaning effort is minimised at alkaline pH in the presence of both the cationic surfactant and the polymer (example 1d), while higher effort is required if either or both of these components is absent (compare with comparative examples 1a, lb and lc). It is believed that this is due to the formation of a WO 98/40452 PG"f/EP98/01273 polymer/surfact.ant complex which increases the surfactant concentration a.t the surface.
Table 2 below ~,hows the effect of the cationic type on primary cleaning effort.. Experiments were performed on the soil given above aged for a period of one day after application of the soil at a coverage of 0.25mg/cni.
aP
Lf101 N
N oxo ap x ~r r~ I 1 ,~ o t1,~r dP dP x M
l~ I I e--i1 (7~c~
'' w N as ao In x I ~ 1 o p, vo x L~ W -1 I 1 G~,~-I
b N
x o.
W -I 1 I O (~ M
o U
O~ N
N ~ ~ ~ x ~ 1 I I ~
a~
,4 d~ 00 n a~ o y x 1 1 1 o p, ,-1 N
x L' I I I I ~
z 0o rl o ~1 1 r--I1~ W
w w o -~1a -~ o 0o c>aas m ~1 b E
A v a x a n n n ~ ~ ~ i ~ JI
From table 2 it can be seen that compared with the control (comparative example 2a) primary cleaning effort is in all cases markedly :reduced by the combination of surfactant, polymer and cationic (examples 2d, 2f and 2h) as compared with systems in which only the cationic is added (comparative examples 2c, 2e and 2g). Addition of the polymer alone, in the absence of 'the cationic surfactant, (comparative example 2b) gives no si~~nificant reduction in primary cleaning effort at this pH. It can be seen that of the different cationics used the TTAB and CTAB materials give the lowest cleaning effort.
Table 3 below further illustrates the effect of pH for compositions which comprise 7~ Dobanol 91-5 and 0.5~ Versicol E11 in the presence of differing levels of CTAB at the pH
indicated. pH was regulated with hydroxide and the experiments were performed on the soil given above aged for a period of one day after application of the soil at a coverage of 0.25mg/cm2. Results are given in total primary effort to clean in N/s.
Table 3 3a 3b 3c pH pH6 pH8 pHlO
0~ CTAB 213 262 -25~ CTAB 163 195 193 0.5~ CTAB 142 180 175 1~ CTAB 151 131 190 From Table 3 it can be seen that through this pH range the primary cleaning effort generally fails as the level of the cationic surfactant level is increased.
Table 4 below provides additional data on the effect of pH for compositions which comprise 8~ active in total and 0.5~
Versicol E11 in the presence of differing levels of CTAB (C) and DTAB (D) at the pH indicated. The non-cationic active material is Dobanol 91-5. pH was regulated with hydroxide and the experiments were performed on the soil given above aged for a period of one day after application of the soil at a coverage of 0.25mg/ciri. Results are given in total primary cleaning effort in N/s.
Table 4 4a 4b 4c 4d pH pH4 pH7 pH4 pH7 type of cationic C C D D
0.00 cationic 162 749 162 749 0.13 cationic 171 399 171 308 0.25 cationic 188 288 173 227 0.50 cationic 190 403 162 269 From Table 4 it can be seen that compositions show poor cleaning performance at the higher pH unless the cationic surfactant is present. In the lower pH range (examples 4a and 4c) the effect disclosed in WO 94/26858 is believed to be acting to reducEa the primazy cleaning effort requirement and there is no significant effect of adding cationic (if anything the compositions get slightly worse) although useful cleaning results are still attained.
In the higher pFi range (examples 4b and 4d) it can be seen that the addition of cationic surfactant significantly lowers the cleaning efi_ort and enables the nonionic/polymer systems to achieve similar results to those obtained in more acidic products.
Table 5 below show the effect on the primary cleaning energy effort requirement and the cloud point of modifying the nonionic surfactant present. The compositions comprise 7~ of a mixture of Dobanol 91-5 and Dobanol 91-8, 1~ CTAB and 0.5~
Versicol E11. ~f'Ihe table lists the percentage of Dobanol 91-8 in the nonionic portion of the surfactant mixture, the remainder of the: mixture being the Dobanol 91-5.
Table 5 ~ ~~obanol 91-8 Effort (N/s) Cloud Point I
5a 0 331 30 5b 25 401 42.5 5c 50 479 53 5d 75 809 64 5e 100 876 75 From Table 5 it can be seen that the compositions which are rich in the Dobanol 91-5 surfactant (for example 5a) give the best reduction in primary cleaning effort, whereas while the compositions which are rich in Dobanol 91-8 (for example 5e) also give a useful reduction in primary cleaning effort this is less marked than for the other surfactant. It is clear from the table that the selection of an appropriate combination of surfactants enables the cloud point of the compositions to be controlled.
Table 6 below shows the effect on the secondary cleaning effort requirement in subsequent cleaning cycles for the compositions of the invention, using two different cationics.
The 'VARI' material is Varisoft 442-100P (TM: ex. Sherex-Inlitco) a dihardened tallow dimethyl ammonium chloride.
Table 6 6a 6b 6c 6d CTAB CTAB VARI VARI
primary recoiled primary recoiled pH6 886 203 846 364 pH8 679 257 745 460 pHlO 969 426 958 602 pHl2 637 211 501 408 From Table 6 it can be seen that in all cases the surfaces proved more easy to clean in the second cleaning cycle (compare 6a with 6b and compare 6c with 6d). It is believed that this demonstrates that the one or more components of the composition are being deposited on the surface and leaving a residual film which either retards the attachment of soil or aids in its removal, i.e. the secondary cleaning effort after re-soiling of the surfaces is reduced.
The above examp7Les illustrate how the compositions of the present invention enable a reduction of both primary and secondary cleaning effort over a broad pH range.
Table 7: below :shows the result of a biocidal efficacy test using the following bacteria (from the National Collection of Type Cultures oi: American Type Culture Collection). Cultures were maintained on beads in a cryopreservative at -80/C.
Staphylococcus ~3ureus NCTC 10788 Pseudomomas aeruginosa ATCC 15442 Saccharomyces cesrevisiae ATCC 9763 To prepare inocc:ulum a bead was removed from the storage vial and aseptically transferred to 100m1 Nutrient Broth and incubated at 37/C in a shaking waterbath for 24 hours (bacteria). After incubation, the culture suspensions were aseptically transferred into two 50m1 centrifuge tubes and centrifuged at 21808 for 10 minutes (Mistral 1000, MSE) in order to harvest: the cells. The supernatants were poured off and the pellets resuspended in peptone diluent (0.1 percent peptone and 0.8'_> percent sodium chloride, pH 7.0). The suspensions were: kept at 4/C until needed, and before use in the test were lE:ft on the bench at ambient temperature for at least 30 minute:.
The test used was a microtitre plate assay, which is comparable to 'Method for the test for the antimicrobial activity of disinfectants in food hygiene', more commonly known as the European Suspension Test (EST). Bovine albumin at a low level (0.03 percent) or a high level (0.3 percent) was included in some of the tests. A 1/15 dilution of the formulation was made in 'Water of Standard Hardness' as referred to in the above method.
Microtitre plates (Bibby Sterilin, sterile 96-well, flat-bottom) were prepared by adding 270m1 quenching solution in row B of each plate and 270m1 peptone diluent into rows C-G.
The quench solution was composed of Tween 80 (3.0 percent), lecithin (0.3 percent), L-histidine (0.1 percent), sodium thiosulphate (0.5 percent) and 0.25N KHZPO9buffer (1 percent) in sterile distilled water (1 litre). Sterile distilled water or bovine albumin as appropriate (120m1) was added to the test wells of row A. Then the formulation (150m1 1/I5 dilution) was added to the appropriate test wells. The formulations were randomised across the plates. The plates were placed on a stainless steel 'plate incubator' tray attached to a circulating waterbath, held at 20/C.
An aliquot of microbial suspension (30m1) was then added simultaneously to all the wells of row A of the microtitre plate using a multichannel pipette. The test mixture was left at 20/C for a contact time of 5 minutes ~ 5 seconds, after which time an aliquot (30m1) was transferred into row B
(quench), giving a 10-' dilution. After 5 t 1 min, an aliquot (30m1) was transferred to row C (peptone diluent). Further serial dilutions were performed in the same manner until row G
(10-6 dilution). The bacteria were enumerated using the Miles-Misra technique. Three aliquots (10m1) from each dilution were spotted onto pre-dried Tryptone Soya Agar plates which had been divided into 6 sectors. The spots were allowed to dry and the plates incubated at 37/C for 24 hours. Plates were counted by selecting a dilution segment with 3-50 cfu per spot and the average of the 3 spots was calculated. The decadic logaritlun of this number was calculated and subtracted from the decadic logarithm of the initial count to give the log (reduction).
All formulation's contained Dobanol 91-8 (8 percent) and polymer (polyac:rylic acid 0.5wt percent), and were adjusted to pH9. Formulations were diluted 1/30 in test in presence of WSH (water of standard hardness) and soil (bovine albumin).
Examples are provided both for formulations containing CTAB
and benzalkoniw:n chloride.
ORGANISM CTAB BAAC (%) MEAN LOG
(REDUCTION) (%) (2 replicates) LOW BOIL HIGH
SOIL
1.0 - 4.5 4.7 Staph. aureus 2.0 - 7.4 7.6 - 1.0 7.2 7.2 - 2.0 7.2 7.2 1.0 - 0.1 0.03 Pseudomonas aeruginosa 2.0 - 0.04 0.01 - 1.0 2.3 2.6 - 2.0 3.5 3.1 1.0 - 4.4 3.5 Saccharomyces cerevisiae 2.0 - 7.0 2.7 - 1.0 6.0 6.0 - 2.0 6.0 6.0 From the results. given in Table 7 it can be seen that the levels of cationic used in the compositions of the present invention are sufficient to give a biocidal effect. Tt can also be seen that benzalkonium chloride has an improved biocidal effect even against the normally recalcitrant Pseudomonas aeruginosa.
In order to show the effect of sequesterant in improving bacterial kill, formulations were prepared which contained Dobanol 91-8 (7wt percent) and polymer (VERSIC(7L E11 polyacrylic acid. 0.5wt percent), and were adjusted to pH2l.
Formulations were diluted 1/20 in the presence of WSH (water of standard hardness) and 0.03 soil (bovine albumin) on final suspension. Examples are provided for formulations containing benzalkonium chloride (BAC) at both 1.0 and 2.0 wt~.
Sequesterant, either EDTA or MGDA was used as indicated in table 8. The test bacteria was Pseudomonas aeruginosa ATCC
15442, and assays were conducted as described above. Examples which give a log reduction greater than 5 are indicated in bold.
HAC EDTA MC3DA Log % % % Reduction 1 0.5 0 1.22 1 1 0 1.1 1 1.5 0 5.54 1 2 0 5.66 1 2.5 0 5.66 2 0.5 0 1.86 2 1 0 2.17 2 1.5 0 5.66 2 2 0 5.3 2 2.5 0 5.66 1 0 0.5 0.89 1 0 1 1.23 1 0 1.5 1.44 1 0 2 4.57 1 0 2.5 5.42 2 0 0.5 1.7 2 0 1 ' 2.95 2 0 1.5 3.46 2 0 2 5.48 I
2 0 2.5 5.74 The results givs:n in Table 8 show that a log five reduction in viable counts can be obtained by use of appropriate levels of sequestering agents .
In order to demonstrate the advantages of longer lasting hygiene which accrue with the compositions of the present invention, formulations were prepared which contained Dobanol 91-8 (7wt percent) with and without polymer (VERSICOL E11 polyacrylic acid 0.5wt percent), and were adjusted to pHll.
Formulations were diluted 1/20 in the presence of WSH (water of standard hardness) and 0.038 soil (bovine albumin) on final suspension. Examples are provided for formulations containing benzalkonium chloride (BAAC) at both 1.5 and 2.0 wt~.
Sequesterant, either EDTA or MGDA was used as indicated in table 9.
Efficacy was determined against Staphylococcus aureus NCTC
6538 by means of the method set out below.
Glazed ceramic t=files squares (size = 2.5x2.5cm, were cut from plain blaclt glazed Cristal (TM) tiles, ex H & R Johnson with all sloping edges removed. The tiles were cleaned rigorously before application of the test solution or product, so than a uniform coverage on a hydrophilic surface is obtained. Cleaning is undertaken on the day that application of product, and rinsing is carried out no longer than 24 hrs before microbiological testing is undertaken.
Tiles were cleaned by applying calcite powder to the tile and rubbing vigorously with a clean, damp sponge cloth.
Tiles are rinsed with de-ionised water and it was determined if the tile was hydrophilic all over by allowing a small amount of water to run over it. The water should run smoothly over the tile and form an even film over the entire surface. If an5r area remained hydrophobic calcite was re-applied and the cleaning process repeated. After cleaning, tiles were dried by wiping with a clean paper tissue (Kimsoft (TM) facial tissue).
50u1 of cleaning product (whether a formulation according to the invention, a control or a comparative example) was placed on a clean tile and carefully spread it over the whole tile surface using a flattened micropipette tip. The tile was allowed to dry in a 30oC incubator then any rinses were carried out by placing each tile in 100m1 of sterile WSH for 30 seconds, removing and placing in a 30oC incubator to dry.
After treatment with the products according to the invention, comparative examples or controls the tiles were stored in a microbiological safety cabinet to limit contamination.
In order to demonstrated the substantive antibacterial effect, each product was tested in duplicate, using 50u1 of sterile distilled water as the control formulation for control tiles. At time zero tiles treated according to the present invention were inoculated together with a control tile with 20u1 of culture (as described above) so that there were approximately 2x10 bacteria/tile in a 0.03 Bovine Albumin soil. The bacteria were spread over the whole tile area using a sterile spreader. After 30 minutes contact time between the bacteria and the tiles, a sterile microbiological cotton swab was wet with quench solution and swabbed thoroughly over the tile in two directions at right angles to each other. The end off the swab was broken off into l0ml of quench solution and the process repeated with a dry swab to remove residual liquid and bacteria. Quench bottles were left for 30 minutes to allow for recovery of injured cells (60 minutes for E. coli). After recovery each quench bottle was vortexed for 15 seconds at high speed to resuspend the cells evenly in the quench solution.
For each tile being tested, a column of wells in a sterile microtitre plate was inoculated with 270u1 of Peptone water, leaving the first well empty in each case. The first well was filled with 300u1 of the quenched swab solutions. A
further 500u1 o:f quenched swab solution was plated directly onto an agar plate and spread using a sterile spreader.
This plate is used for enumerating low levels of survivors.
Serial 10-fold dilutions of the solutions were prepared by transferring 30~a1 of solutions in row 1 to row 2; mixing them, then repeating the procedure down to row 6 so that a 10-6 dilution i;s achieved (pipette tips are changed between transfers).
For each tile sample taken an agar plate (dried plate face down with the l:id off in a 60oC oven for 15 minutes prior to use and marked :into 6 equal segments on its base with a marker pen) was spotted with 10u1 volumes of liquid onto the appropriate segment of the plate, placing 3 spots per segment. All plates were left face up to dry and then placed face down in an incubator at 37oC for 24 hrs. Counts were obtained for the plates and 1og10 reduction obtained by subtracting the 1og10 count[test] from 1og10 count[control].
Results for such a test are shown in table 9 below: all composition contained soil and nonionic surfactant as noted above and the other components of the neat cleaning composition are indicated in the table. As noted above, log reductions are calculated relative to controls which had been treated with sterile water rather than a 'cleaning' composition.
Example BAAC% Polymer% EDTA% MC3DA% Log Red Log Red.
Rinsed Unrinsed 9a 1.5 0.5 - 2.5 1.41 3.49 9b 1.5 - - 2.5 1.01 4.02 9c 1.5 0.5 1.5 - 1.80 3.87 9d 1.5 - 1.5 - 0.35 4.02 9e 2.0 0.5 - 2.5 2.18 4.02 9f 2.0 - - 2.5 0.38 4.02 ~9g 2.0 0.5 1.5 - 2.67 4.02 9h 2.0 - 1.5 - 0.01 2.48 From the results in table 9 it can be seen that bacteria recovered from a surface which had been previously treated with a composition according to the invention (9a, 9c, 9f or 9h) had a significantly reduced viability of between 2-4 logs when the surface was not rinsed. This reduction in viability would be expected given that the surfaces had been exposed to a biocide-containing solution which had been allowed to dry on the surface.
For the tiles which had been rinsed, only those treated with formulations which contained polymer (9a, 9c, 9e and 9g) showed markedly better than 1 log reduction (90~) of the recovered bacteria. Formulations using 2~wt BAAC, polymer and sequesterant (9e and 9g) showed the best results in the example with a better than 99~ reduction in viable count.
It is believed that these results show that the compositions of the invention have a persistent antimicrobial effect as compared with the polymer free control compositions.
Plastic Petri dishes (9cm diameter, 2cm depth) were treated with 20m1 of test product at the recommended dilution (1:20, 30 min, room temperature), before decanting the solution and allowing plates to dry. Control plates were untreated.
Prior to dilution the example formulation (10a) contained Dobanol 91-8 (7~~wt) with polymer (VERSICOL E11 polyacrylic acid 0.5~wt), cationic surfactant (2gwt BAAC) and sequesterant (2.5~wt MGDA) and was adjusted to pHl1 with NaOH. Comparative examples were also performed against Lysoform (TM) a commercially available disinfectant product.
A suspension of Aspergillus niger spores (ATCC 6275).
prepared in sterile distilled water, was introduced to the plates (20m1 per plate, 3 x 105 spores/ml). Plates were agitated in an orbital shaker to distribute spores evenly (1 min, 100 rpm) and left standing at room temperature for 30 min, before re-agitating (1 min, 100 rpm). Supernatants were discarded and the plates allowed to dry. As the plates had been allowed to dry after pretreatment and prior to exposure to the spores, the spores had not been exposed to relatively high. levels of the pre-treatment compositions.
Initial attachment of spores to the treated and untreated plates could then be determined by the method given below.
To show the effect of rinsing, duplicate dishes which had been treated as above (including the exposure to mould spores) were subjected to rinsing by introducing standard hard water (lOml) into each dish and mixing (1 min, 100rpm).
The supernatant was discarded and the plates dried at room temperature.
To show the effect of scrubbing duplicate dishes which had been inoculated with spores as described above were scrubbed using an epicyclic scrubbing device. Scrubbing of the surface was achieved through the use of standard, pre-washed sponge cloths, dampened with standard hard water, at a fixed pressure of 80g/cm2, (10 cycles, speed 4). Dishes were then allowed to dry at room temperature as before.
Each of the above plates was viewed under light microscopy (x40 magnification) and the average number of attached spores determined from each of five pre-defined fields of view. Plates from the rinsing and scrubbing experiments were re-counted and the numbers of spores recorded. The percentage attachment following each of the treatments was calculated by the equation:
AveraSxe no. spores countP~ x 100 Average no. spores on untreated control Results are given in table 10 below, a percentage of spores attached as compared with an untreated surface Initial Attachment Attachment after Attachment after rinsing Scrubbing 10a 45.05 32.67 5.41 Lysoform (TM) 64.26 53.07 14.74 Control 100.00 77.53 38.83 As expected, thE: results show that for untreated surfaces rinsing and scrubbing remove some mould spores, but leave almost 40~ of the spores on the surface even after scrubbing. The results show that spores are less likely to attach to a suri:ace treated with the compositions of the present invention, and, when spores do attach, they are not as strongly bound to the surface.
Statistical ana7Lysis of the data showed a significant decrease (95~ confidence) in the percentage of spores which attached to the surface in the presence of the polymer-containing formulation, compared to the reference product Lysoform (RTM) and as compared with untreated surfaces. As noted above, this difference was seen at each stage of treatment.
It is believed that these results show that the compositions of the invention at least partly prevent the adhesion of spores to a suri:ace and consequently, it is believed that the use of a composition according to the present invention would reduce thE~ rate of regrowth on a clean surface of micro-organisms including moulds or bacteria which propogate through spores.
~!~: c~~; 1.:, ;
Claims (10)
1. A hard surface cleaning composition of pH 3-12 comprising:
a) 1-30%wt nonionic surfactant, b) 0.005-5%wt of a water soluble, anionic polymer having an average molecular weight of above 100,000 and less than 1000000, said polymer being free of quaternary nitrogen groups, wherein the ratio of polymer:nonionic is 0.1:1 or less, and c) 0.005-5%wt of a cationic surfactant.
a) 1-30%wt nonionic surfactant, b) 0.005-5%wt of a water soluble, anionic polymer having an average molecular weight of above 100,000 and less than 1000000, said polymer being free of quaternary nitrogen groups, wherein the ratio of polymer:nonionic is 0.1:1 or less, and c) 0.005-5%wt of a cationic surfactant.
2. Composition according to claim 1 wherein the polymer is a polymer of acrylic or methacrylic acid or malefic anhydride, or a co-polymer of one or more of the same either together or with other monomers.
3. Composition according to claim 2 wherein the polymer is selected from the group comprising polyacrylic acid, polymaleic anhydride and copolymers of either of the aforementioned with ethylene, styrene and methyl vinyl ether.
4. Composition according to claim 1 wherein the cationic surfactants is a material of the general formula R1R2R3R4N+X-, wherein all of the radicals are hydrocarbons with or without hydroxy substitution, at least one of the radicals R1-R4 is a C6-C22 alkyl, alkaryl or hydroxyalkyl, at least one of the radicals R1-R4 is a C1-C4 alkyl or hydroxy alkyl and X is a monovalent anion equivalent.
5. Composition according to claim 4 wherein R1 and R2 are the same or different C1-C4 alkyl or hydroxy alkyl, R3 is a C6-C22 alkyl, alkaryl or hydroxyalkyl, R4 is a C1-C22 alkyl, alkaryl or hydroxyalkyl and X is a monovalent anion equivalent.
6. Composition according to claim 5 wherein R1 and R2 are methyl, R3 is C8-C18 alkyl and R4 is methyl, C8-C18 alkyl or benzyl.
7. Composition according to claim 1 which further comprises a metal ion binding agent.
8. Hard surface cleaning composition of pH of 7-11 which comprise:
a) 5-20%wt of a ethoxylated, 2-15EO, C8-C18 alcohol, nonionic surfactant, b) less than 1%wt of anionic surfactants, c) 0.2-2%wt of a water soluble, anionic polymer having an average molecular weight of above 100,000 and less than 1,000,000, said polymer being a polymer of at least one of acrylic acid, methacrylic acid or malefic anhydride, with at least one of acrylic acid, methacrylic acid, malefic anhydride, ethylene, styrene and methyl vinyl ether, wherein the ratio of polymer:nonionic is 0.1:1 or less, d) 0.05-2%wt of a cationic surfactant which is a quaternary nitrogen compounds of the general formula R1R2R3R4N+X-, where R1 and R2 are the same or different C1-C4 alkyl or hydroxy alkyl, R3 is a C6-C22 alkyl, alkaryl or hydroxyalkyl, R4 is a C1-C22 alkyl, alkaryl or hydroxyalkyl and X is a monovalent anion equivalent, and e) not more than 2% of a solvent selected from the group comprising di-ethylene glycol mono n-butyl ether, mono-ethylene glycol mono n-butyl ether, propylene glycol n-butyl ether and mixtures thereof.
a) 5-20%wt of a ethoxylated, 2-15EO, C8-C18 alcohol, nonionic surfactant, b) less than 1%wt of anionic surfactants, c) 0.2-2%wt of a water soluble, anionic polymer having an average molecular weight of above 100,000 and less than 1,000,000, said polymer being a polymer of at least one of acrylic acid, methacrylic acid or malefic anhydride, with at least one of acrylic acid, methacrylic acid, malefic anhydride, ethylene, styrene and methyl vinyl ether, wherein the ratio of polymer:nonionic is 0.1:1 or less, d) 0.05-2%wt of a cationic surfactant which is a quaternary nitrogen compounds of the general formula R1R2R3R4N+X-, where R1 and R2 are the same or different C1-C4 alkyl or hydroxy alkyl, R3 is a C6-C22 alkyl, alkaryl or hydroxyalkyl, R4 is a C1-C22 alkyl, alkaryl or hydroxyalkyl and X is a monovalent anion equivalent, and e) not more than 2% of a solvent selected from the group comprising di-ethylene glycol mono n-butyl ether, mono-ethylene glycol mono n-butyl ether, propylene glycol n-butyl ether and mixtures thereof.
9. A method for cleaning hard surfaces which comprises the step of treating the surface with a cleaning composition according to any one of claims 1-8.
10. The use, in a hard-surface cleaning composition comprising 1-30%wt of a nonionic surfactant and 0.005-5%wt of an antimicrobial cationic surfactant, of o.005-5%wt of a water soluble, anionic polymer having an average molecular weight of above 100,000 and less than 1000000, said polymer being free of quaternary nitrogen groups, to prolong the antimicrobial effectiveness of the antimicrobial cationic surfactant on said hard-surface.
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GB9704989.4 | 1997-03-11 | ||
GBGB9704989.4A GB9704989D0 (en) | 1997-03-11 | 1997-03-11 | Improvements relating to hard-surface cleaning compositions |
PCT/EP1998/001273 WO1998040452A1 (en) | 1997-03-11 | 1998-02-24 | Hard-surface cleaning compositions |
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CA2280877A1 true CA2280877A1 (en) | 1998-09-17 |
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CA002280877A Abandoned CA2280877A1 (en) | 1997-03-11 | 1998-02-24 | Hard-surface cleaning compositions |
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EP (1) | EP0971997B1 (en) |
JP (1) | JP2001514693A (en) |
KR (1) | KR20000076119A (en) |
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AU (1) | AU734919B2 (en) |
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TR (1) | TR199902201T2 (en) |
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ZA (1) | ZA981574B (en) |
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US6080387A (en) * | 1998-07-15 | 2000-06-27 | The Clorox Company | Aerosol antimicrobial compositions |
WO2000034423A1 (en) * | 1998-12-10 | 2000-06-15 | Unilever Plc | Detergent compositions |
DE19910788A1 (en) * | 1999-03-11 | 2000-09-14 | Cognis Deutschland Gmbh | Gel-shaped detergent for flush toilets |
AU2001253718A1 (en) * | 2000-04-20 | 2001-11-07 | Colgate-Palmolive Company | Toilet bowl cleaning compositions |
JP2002121593A (en) * | 2000-09-26 | 2002-04-26 | Spartan Chemical Co Inc | Sterilizing water-based composition for washing rigid surface and using method thereof |
GB0023898D0 (en) * | 2000-09-29 | 2000-11-15 | Reckitt Benckiser Inc | Improvements in or relating to organic compositions |
KR20040039615A (en) * | 2002-11-04 | 2004-05-12 | 애경산업(주) | Liquid cleasing composition having improved capacity for forming foam and low temperature stability |
KR20040051869A (en) * | 2002-12-13 | 2004-06-19 | 주식회사 엘지생활건강 | Composition of Liquid Cleaner having Excellent Viscosity and Detergency |
US7442679B2 (en) | 2004-04-15 | 2008-10-28 | Ecolab Inc. | Binding agent for solidification matrix comprising MGDA |
KR20050119490A (en) * | 2004-06-16 | 2005-12-21 | 애경산업(주) | Liquid detergent composition in the form of o/w microemulsion containing fabric softening agent |
JP5281420B2 (en) * | 2009-01-20 | 2013-09-04 | 花王株式会社 | Liquid detergent composition for hard surfaces |
WO2011142424A1 (en) * | 2010-05-14 | 2011-11-17 | ユケン工業株式会社 | Aqueous cleaning agent composition |
JP5536563B2 (en) * | 2010-06-28 | 2014-07-02 | 株式会社Adeka | Cleaning composition for dishwasher and cleaning method using the composition |
FR2980955B1 (en) * | 2011-10-05 | 2014-12-12 | Anios Lab Sarl | DISINFECTANT AND DETERGENT COMPOSITIONS. |
EA024105B1 (en) * | 2011-11-03 | 2016-08-31 | Юнилевер Н.В. | Liquid antimicrobial hard surface cleaning composition |
EP2773739B1 (en) * | 2011-11-03 | 2015-11-04 | Unilever N.V. | A liquid hard surface antimicrobial cleaning composition |
FR2990364B1 (en) * | 2012-05-11 | 2014-06-13 | Commissariat Energie Atomique | METHOD FOR RADIOACTIVE DECONTAMINATION OF EARTH BY DISPERSE AIR FLOTATION FOAM AND FOAM |
CN102703247B (en) * | 2012-06-01 | 2014-06-18 | 句容市恒祥金属再生利用有限公司 | Dephosphorized cleaning agent for cleaning grinding wheel dust |
WO2014040869A1 (en) * | 2012-09-12 | 2014-03-20 | Unilever N.V. | Hard surface treatment composition |
CN105358593B (en) | 2013-07-03 | 2018-06-22 | 巴斯夫欧洲公司 | The gelatinous polymer composition being polymerize in the presence of polyether compound by the monomer containing acid groups |
WO2016196020A1 (en) * | 2015-05-29 | 2016-12-08 | 3M Innovative Properties Company | Enzyme cleaner for textiles with styrene maleic anhydride copolymers |
EP3316855B1 (en) | 2015-07-01 | 2020-09-23 | 3M Innovative Properties Company | Compositions for spore removal |
CN106701351A (en) * | 2015-11-12 | 2017-05-24 | 艺康美国股份有限公司 | Low-foaming vessel cleaning agent and mixed cationic/nonionic surfactant system for enhancing removal of oil-containing dirt |
CN108472505A (en) | 2015-12-22 | 2018-08-31 | 3M创新有限公司 | The method removed for spore |
EP3565411A4 (en) | 2017-01-04 | 2020-07-01 | 3M Innovative Properties Company | Methods of removing spores |
BR112020004368A2 (en) | 2017-09-06 | 2020-09-08 | Basf Se | active washing and cleaning polymer film, process for producing an active washing and cleaning polymer film, use of a polymer film, cover or coating for a portion of detergent or cleaner, and, detergent or cleaner |
JP7170300B2 (en) * | 2017-12-11 | 2022-11-14 | 株式会社ニイタカ | liquid detergent composition |
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LU84753A1 (en) * | 1983-04-15 | 1984-11-28 | Oreal | CLEANSING AND FOAMING COMPOSITION BASED ON NON-IONIC SURFACTANTS AND ANIONIC POLYMERS |
PH25826A (en) * | 1986-03-14 | 1991-11-05 | Johnson & Son Inc S C | Prespotter laundry detergent |
JPH01250473A (en) * | 1988-03-31 | 1989-10-05 | Lion Corp | Liquid softening agent composition |
EP0379544A1 (en) * | 1988-06-21 | 1990-08-01 | Vax Appliances Limited | Fabric cleaning and sanitizing compositions |
GB9310365D0 (en) * | 1993-05-18 | 1993-06-30 | Unilever Plc | Hard surface cleaning compositions comprising polymers |
CZ174497A3 (en) * | 1994-12-09 | 1998-06-17 | Unilever N. V. | Cleansing agent |
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- 1997-03-11 GB GBGB9704989.4A patent/GB9704989D0/en active Pending
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- 1998-02-24 AU AU67280/98A patent/AU734919B2/en not_active Ceased
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- 1998-02-24 JP JP53918698A patent/JP2001514693A/en not_active Ceased
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- 1998-02-24 KR KR1019997008208A patent/KR20000076119A/en not_active Application Discontinuation
- 1998-02-24 CA CA002280877A patent/CA2280877A1/en not_active Abandoned
- 1998-02-24 ES ES98912446T patent/ES2202825T3/en not_active Expired - Lifetime
- 1998-02-24 HU HU0001503A patent/HUP0001503A3/en unknown
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JP2001514693A (en) | 2001-09-11 |
PL187303B1 (en) | 2004-06-30 |
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AU6728098A (en) | 1998-09-29 |
DE69816603T2 (en) | 2004-06-09 |
EP0971997B1 (en) | 2003-07-23 |
GB9704989D0 (en) | 1997-04-30 |
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WO1998040452A1 (en) | 1998-09-17 |
IN190010B (en) | 2003-05-31 |
AU734919B2 (en) | 2001-06-28 |
TR199902201T2 (en) | 2000-05-22 |
ZA981574B (en) | 1999-08-25 |
KR20000076119A (en) | 2000-12-26 |
CN1250470A (en) | 2000-04-12 |
BR9808003A (en) | 2000-03-08 |
HUP0001503A3 (en) | 2003-02-28 |
ID22433A (en) | 1999-10-14 |
MY120141A (en) | 2005-09-30 |
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