CN111574682B - Waterborne polyurethane dispersant and color paste containing same for textile digital printing - Google Patents
Waterborne polyurethane dispersant and color paste containing same for textile digital printing Download PDFInfo
- Publication number
- CN111574682B CN111574682B CN202010305300.6A CN202010305300A CN111574682B CN 111574682 B CN111574682 B CN 111574682B CN 202010305300 A CN202010305300 A CN 202010305300A CN 111574682 B CN111574682 B CN 111574682B
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- CN
- China
- Prior art keywords
- monomer
- parts
- polyurethane dispersant
- anchoring
- color paste
- 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.)
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- 239000002270 dispersing agent Substances 0.000 title claims abstract description 52
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 33
- 239000004814 polyurethane Substances 0.000 title claims abstract description 33
- 238000007639 printing Methods 0.000 title claims abstract description 24
- 239000004753 textile Substances 0.000 title claims abstract description 18
- 239000000178 monomer Substances 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000004873 anchoring Methods 0.000 claims abstract description 19
- 150000002009 diols Chemical class 0.000 claims abstract description 17
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 15
- 239000002904 solvent Substances 0.000 claims abstract description 12
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 11
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 11
- 239000003054 catalyst Substances 0.000 claims abstract description 10
- 239000004970 Chain extender Substances 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 229920001610 polycaprolactone Polymers 0.000 claims abstract description 6
- 239000004632 polycaprolactone Substances 0.000 claims abstract description 6
- 229920000909 polytetrahydrofuran Polymers 0.000 claims abstract description 6
- 239000004417 polycarbonate Substances 0.000 claims abstract description 5
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 10
- ZXHZWRZAWJVPIC-UHFFFAOYSA-N 1,2-diisocyanatonaphthalene Chemical compound C1=CC=CC2=C(N=C=O)C(N=C=O)=CC=C21 ZXHZWRZAWJVPIC-UHFFFAOYSA-N 0.000 claims description 4
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 235000002906 tartaric acid Nutrition 0.000 claims description 4
- 239000011975 tartaric acid Substances 0.000 claims description 4
- JVYDLYGCSIHCMR-UHFFFAOYSA-N 2,2-bis(hydroxymethyl)butanoic acid Chemical compound CCC(CO)(CO)C(O)=O JVYDLYGCSIHCMR-UHFFFAOYSA-N 0.000 claims description 3
- SXQWVGXLKTZECH-UHFFFAOYSA-N 2,2-diaminopentanoic acid Chemical compound CCCC(N)(N)C(O)=O SXQWVGXLKTZECH-UHFFFAOYSA-N 0.000 claims description 3
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 3
- WUKNPIYSKBLCQI-UHFFFAOYSA-N CC(C=C1)=CC=C1C1=CC=C(C)C=C1.N=C=O.N=C=O Chemical compound CC(C=C1)=CC=C1C1=CC=C(C)C=C1.N=C=O.N=C=O WUKNPIYSKBLCQI-UHFFFAOYSA-N 0.000 claims description 3
- 239000006184 cosolvent Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000000080 wetting agent Substances 0.000 claims description 3
- PTBDIHRZYDMNKB-UHFFFAOYSA-N 2,2-Bis(hydroxymethyl)propionic acid Chemical compound OCC(C)(CO)C(O)=O PTBDIHRZYDMNKB-UHFFFAOYSA-N 0.000 claims description 2
- PBSYYAIIQPROQV-UHFFFAOYSA-N 2,2-diaminohexanoic acid Chemical compound CCCCC(N)(N)C(O)=O PBSYYAIIQPROQV-UHFFFAOYSA-N 0.000 claims description 2
- KKTUQAYCCLMNOA-UHFFFAOYSA-N 2,3-diaminobenzoic acid Chemical compound NC1=CC=CC(C(O)=O)=C1N KKTUQAYCCLMNOA-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- 239000003153 chemical reaction reagent Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000000986 disperse dye Substances 0.000 abstract description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 14
- 239000000975 dye Substances 0.000 abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 7
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 239000006185 dispersion Substances 0.000 description 24
- 239000002245 particle Substances 0.000 description 21
- 239000000243 solution Substances 0.000 description 20
- 239000007788 liquid Substances 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 14
- 239000000976 ink Substances 0.000 description 11
- 238000003756 stirring Methods 0.000 description 11
- 239000004480 active ingredient Substances 0.000 description 10
- 239000007864 aqueous solution Substances 0.000 description 10
- 238000001914 filtration Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 239000008367 deionised water Substances 0.000 description 7
- 229910021641 deionized water Inorganic materials 0.000 description 7
- 238000000227 grinding Methods 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 239000000084 colloidal system Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 230000032683 aging Effects 0.000 description 5
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- QDWYPRSFEZRKDK-UHFFFAOYSA-M sodium;sulfamate Chemical compound [Na+].NS([O-])(=O)=O QDWYPRSFEZRKDK-UHFFFAOYSA-M 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 3
- 239000012975 dibutyltin dilaurate Substances 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 2
- ISKQADXMHQSTHK-UHFFFAOYSA-N [4-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=C(CN)C=C1 ISKQADXMHQSTHK-UHFFFAOYSA-N 0.000 description 2
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 2
- UOULCEYHQNCFFH-UHFFFAOYSA-M sodium;hydroxymethanesulfonate Chemical compound [Na+].OCS([O-])(=O)=O UOULCEYHQNCFFH-UHFFFAOYSA-M 0.000 description 2
- 238000013112 stability test Methods 0.000 description 2
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 2
- XOAAWQZATWQOTB-UHFFFAOYSA-N taurine Chemical compound NCCS(O)(=O)=O XOAAWQZATWQOTB-UHFFFAOYSA-N 0.000 description 2
- LXOFYPKXCSULTL-UHFFFAOYSA-N 2,4,7,9-tetramethyldec-5-yne-4,7-diol Chemical compound CC(C)CC(C)(O)C#CC(C)(O)CC(C)C LXOFYPKXCSULTL-UHFFFAOYSA-N 0.000 description 1
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 1
- 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 1
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- AWFFJJAOMMAGFE-BGSQTJHASA-L [dibutyl-[(z)-octadec-9-enoyl]oxystannyl] (z)-octadec-9-enoate Chemical compound CCCC[Sn+2]CCCC.CCCCCCCC\C=C/CCCCCCCC([O-])=O.CCCCCCCC\C=C/CCCCCCCC([O-])=O AWFFJJAOMMAGFE-BGSQTJHASA-L 0.000 description 1
- XQBCVRSTVUHIGH-UHFFFAOYSA-L [dodecanoyloxy(dioctyl)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCCCCCC)(CCCCCCCC)OC(=O)CCCCCCCCCCC XQBCVRSTVUHIGH-UHFFFAOYSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 229960002887 deanol Drugs 0.000 description 1
- -1 diamine propylsulfonate Chemical class 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 239000012972 dimethylethanolamine Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229940001607 sodium bisulfite Drugs 0.000 description 1
- 229940045998 sodium isethionate Drugs 0.000 description 1
- LADXKQRVAFSPTR-UHFFFAOYSA-M sodium;2-hydroxyethanesulfonate Chemical compound [Na+].OCCS([O-])(=O)=O LADXKQRVAFSPTR-UHFFFAOYSA-M 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229960003080 taurine Drugs 0.000 description 1
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000010023 transfer printing Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- ADJMNWKZSCQHPS-UHFFFAOYSA-L zinc;6-methylheptanoate Chemical compound [Zn+2].CC(C)CCCCC([O-])=O.CC(C)CCCCC([O-])=O ADJMNWKZSCQHPS-UHFFFAOYSA-L 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7678—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing condensed aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/288—Compounds containing at least one heteroatom other than oxygen or nitrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
- C08G18/341—Dicarboxylic acids, esters of polycarboxylic acids containing two carboxylic acid groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
- C08G18/348—Hydroxycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
- C08G18/3819—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen
- C08G18/3821—Carboxylic acids; Esters thereof with monohydroxyl compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
- C08G18/4269—Lactones
- C08G18/4277—Caprolactone and/or substituted caprolactone
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/4808—Mixtures of two or more polyetherdiols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4833—Polyethers containing oxyethylene units
-
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
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- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
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- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
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- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
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- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/16—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using dispersed, e.g. acetate, dyestuffs
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- D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
- D06P1/5264—Macromolecular compounds obtained otherwise than by reactions involving only unsaturated carbon-to-carbon bonds
- D06P1/5285—Polyurethanes; Polyurea; Polyguanides
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Abstract
The invention belongs to the field of materials, and particularly discloses a water-based polyurethane dispersant which is mainly prepared from a hydrophobic monomer, an anchoring monomer, a hydrophilic monomer, a catalyst, a capping agent and a solvent; the hydrophobic monomer is at least one of polytetrahydrofuran diol, polycarbonate diol and polycaprolactone diol; the anchoring monomer is a benzene ring-containing and nitrogen-based derivative monomer; the hydrophilic monomer is polyethylene glycol and/or a chain extender. The prepared main chain of the dispersant has an anchoring structure which is strongly adsorbed with the surface of the dye, can carry out high-compatibility strong adsorption on the surface of the dye, and can effectively reduce the surface energy of the disperse dye; meanwhile, the hydrophilic structure has good compatibility with water, the hydrophilic structure can be smoothly unfolded to form three-dimensional space obstacle or electrostatic repulsion, and the dispersing ability is strong and the stability is good. The color paste for textile digital printing prepared by the waterborne polyurethane dispersant has high dispersibility and stability.
Description
Technical Field
The invention belongs to the field of materials, and particularly relates to a waterborne polyurethane dispersant and a color paste containing the same for textile digital printing.
Background
The traditional textile printing needs to use a large amount of water to clean sizing agent and uncolored pigment, and the generated waste water is considerable and has great influence on the environment; when the printed and dyed cloth is dried, a large amount of heat energy needs to be consumed, so that the cost is high; and the color paste coating required by the traditional screen printing is far higher than the ink amount required by ink-jet digital printing, the ink amount required by the ink-jet digital printing is low, and the resolution and the precision are also higher than those of the screen printing. Because the ink consumption of the ink-jet digital printing ink is low, the energy required for transfer printing and drying is obviously lower than that of the traditional textile printing, even drying is not needed, and the method has great advantages for the high-speed textile printing and dyeing industry. In addition, the ink-jet digital printing process of printing as required can reduce or eliminate cloth pulp washing process, greatly reduce the generation of sewage, and is a clean and environment-friendly green process.
Although the ink-jet digital printing has many advantages, the problems of broken holes, oblique jetting or no ink discharge are caused by the blockage of the nozzle due to the uneven and unstable dye dispersion. Therefore, how to ensure stable dispersion of the dye particles in the ink becomes a problem to be solved urgently.
Non-structured dispersants, such as conventional small molecule dispersants or polymeric dispersants, have been conventionally used, in which the anchor group has too few or too weak adsorption sites for the disperse dye, and the hydrophilic chain is too short or too long, and affinity for water is too poor to generate sufficient steric hindrance or electrostatic repulsion. Therefore, the water-based textile digital printing paste with strong dispersion and high stability cannot be obtained, and the disperse dye is easy to separate out, settle and block the spray head.
Therefore, it is desirable to provide a strongly dispersible, highly stable aqueous dispersant.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art described above. Therefore, the invention provides the waterborne polyurethane dispersant which has strong dispersibility and high stability and can solve the problems of uneven and unstable dye dispersion.
A water-based polyurethane dispersant is mainly prepared from a hydrophobic monomer, an anchoring monomer, a hydrophilic monomer, a catalyst, a capping agent and a solvent; the hydrophobic monomer is at least one of polytetrahydrofuran diol, polycarbonate diol or polycaprolactone diol; the anchoring monomer is a benzene ring-containing and nitrogen-based derivative monomer; the hydrophilic monomer is polyethylene glycol and/or a chain extender.
The anchoring monomer has the function of increasing the anchoring group of the structure of the disperse dye in the dispersant, and helps the dispersant to be adsorbed to the surface of the disperse dye more strongly and stably. The hydrophilic monomer has the function of increasing the compatibility of the dispersing agent to water, and the molecular chain length and electrostatic force of the hydrophilic monomer are utilized to generate steric hindrance and electrostatic repulsion, so that the disperse dye is stably dispersed.
The dispersing agent is mainly prepared from the following raw materials in parts by weight:
preferably, the molecular weight of the hydrophobic monomer is 100-2000; further preferably, the molecular weight of the hydrophobic monomer is 200-1000. Too large weight average molecular weight of the hydrophobic monomer can cause too far spacing of anchoring groups and weakening adsorption force on pigment particles; the molecular weight is too small, the anchoring groups are too closely spaced to be effectively adsorbed.
Preferably, the anchoring monomer is at least one of diphenylmethane diisocyanate, dimethylbiphenyl diisocyanate, or naphthalene diisocyanate.
Preferably, the hydrophilic monomer is polyethylene glycol and/or a chain extender;
preferably, the molecular weight of the polyethylene glycol monomer is 500-15000; further preferably, the molecular weight of the polyethylene glycol monomer is 1000-10000. Too large weight average molecular weight of the hydrophilic monomer can cause too long molecular chains to generate winding flocculation, and the dispersion of pigment particles is poor; the molecular weight is too small, the chain length of the molecules is too short, effective steric hindrance cannot be formed, and the particles are easy to aggregate and have coarse particle size.
Preferably, the chain extender is one or more of tartaric acid, dimethylolpropionic acid, dimethylolbutyric acid, diaminobenzoic acid, diaminopentanoic acid, diaminocaproic acid, diethanolamine, 1, 2-propanediol-3-sulfonate or 1, 4-butanediol-2-sulfonate. The chain extender has the functions of increasing the water solubility of the dispersing agent and generating electrostatic repulsion, and promotes the dispersion stability of the disperse dye.
Preferably, the catalyst is at least one of organic tin, organic zinc or organic titanium; further preferably, the catalyst is at least one of dibutyltin dilaurate, dioctyltin dilaurate, stannous octoate, dibutyltin diacetate, dibutyltin dioleate, zinc isooctanoate, or tetrabutyl titanate. The catalyst functions to activate the anchoring monomer to enable it to undergo polymerization with other monomers.
Preferably, the end-capping agent is one or more of dimethylethanolamine, taurine, sodium bisulfite, sodium hydroxymethylsulfonate, sodium isethionate, sodium polypropyleneglycol diamine propylsulfonate, sodium sulfamate, and the like. The end capping agent is used for deactivating the terminal reactive group of the synthesized dispersant, so that the dispersant is prevented from continuously reacting during storage or use.
Preferably, the solvent is at least one of acetone, dimethyl sulfoxide, sulfolane, dimethylformamide, methylpyrrolidone or pyrrolidone; the solvent serves to dissolve the monomers, catalyst, and dispersant upon completion of the polymerization, allowing for rapid reaction in a homogeneous phase.
A preparation method of the water-based polyurethane dispersant comprises the following steps:
(1) under the state of protective atmosphere, adding the hydrophilic monomer, the hydrophobic monomer and the catalyst into the solvent, and mixing to obtain a mixture A;
(2) heating the mixture A, and adding the anchoring monomer to obtain a mixture B;
(3) and heating the mixture B, reacting, and adding an end-capping reagent to obtain the waterborne polyurethane dispersant.
Preferably, the heating step in the step (2) is heating to 40-80 ℃; further preferably, the heating step in the step (2) is heating to 50-70 ℃.
Preferably, the heating step in step (3) is heating to 80-130 ℃; further preferably, the heating step in step (3) is heating to 90-110 ℃.
Specifically, the preparation method of the waterborne polyurethane dispersant comprises the following steps:
(1) under the state of protective atmosphere, adding the hydrophilic monomer, the hydrophobic monomer and the catalyst into the solvent, and mixing to obtain a mixture A;
(2) heating the mixture A to 40-80 ℃, and adding the anchoring monomer to obtain a mixture B;
(3) and heating the mixture B to 80-130 ℃, reacting until the concentration of isocyanate groups (% NCO) is lower than 5%, adding a blocking agent, and reacting for 1-5 hours to obtain the waterborne polyurethane dispersant.
The color paste for textile digital printing comprises water, dye and the aqueous polyurethane dispersant.
Preferably, the color paste for textile digital printing comprises the following components in parts by weight: 50-90 parts of water, 10-50 parts of dye and 5-25 parts of the waterborne polyurethane dispersant.
Preferably, the dye includes red disperse dye 1, 11, 22, 50, 60, 65, 74, 92, 146, 239; yellow disperse dyes 7, 23, 42, 51, 54, 60, 65, 82, 98, 114, 160, 211; brown disperse dyes 1, 5, 19, 21, 27, 30; orange disperse dyes 25, 37, 119; blue disperse dye 14, 26, 56, 60, 72, 91, 165, 359, 360, 366; or mixtures of the above colorants, and the like.
Preferably, the color paste also comprises 0-25 parts of cosolvent and/or 0-5 parts of wetting agent.
Preferably, the cosolvent is at least one of alcohol, ether and alcohol ether, such as isopropanol, ethanol, methyl ether, ethyl ether, ethylene glycol, propylene glycol, and the like.
Preferably, the wetting agent is one or more of BYK154/190/306/333/346/378, DYNFET 800N, Evonik SURFYNOL104E/420/465, DYNOL 604/607.
A preparation method of color paste for textile digital printing comprises the following steps:
(1) dissolving the waterborne polyurethane dispersant and the rest components in water to obtain a pre-dispersion liquid;
(2) and (2) grinding and filtering the pre-dispersion liquid obtained in the step (1), and taking filtrate to obtain the color paste.
Compared with the prior art, the invention has the following beneficial effects:
the waterborne polyurethane dispersant is mainly prepared from a hydrophobic monomer, an anchoring monomer and a hydrophilic monomer; the hydrophobic monomer is at least one of polytetrahydrofuran diol, polycarbonate diol and polycaprolactone diol; the anchoring monomer is a benzene ring-containing and nitrogen-based derivative monomer; the hydrophilic monomer is polyethylene glycol. The main chain of the prepared dispersing agent has an anchoring structure which is strongly adsorbed with the surface of the disperse dye, can simultaneously carry out high-compatibility strong adsorption on the surface of the disperse dye, is not easy to fall off and replace, and can effectively reduce the surface energy of the disperse dye; meanwhile, the hydrophilic structure has good compatibility with water, the hydrophilic structure can be smoothly unfolded to form three-dimensional space obstacle or electrostatic repulsion, and the dispersing ability is strong and the stability is good. The color paste for textile digital printing prepared by the waterborne polyurethane dispersant has high dispersibility and stability.
Detailed Description
In order to make the technical solutions of the present invention more apparent to those skilled in the art, the following examples are given for illustration. It should be noted that the following examples are not intended to limit the scope of the claimed invention.
Example 1
Introducing nitrogen into a reaction bottle provided with a condensing reflux device, and adding 408.5g of methyl pyrrolidone as a solvent at normal temperature; then 37g of polytetrahydrofuran diol (Mw: 250), 6g of tartaric acid, 0.3g of dibutyltin dilaurate and 486g of polyethylene glycol (Mw: 5000) were mixed and heated to 60 ℃ with stirring; then adding 42g of naphthalene diisocyanate into a reaction bottle, heating to 100 ℃ to accelerate the reaction until the concentration of isocyanate group (NCO) is lower than 5%, and finally adding 2.2g of sodium sulfamate to react for at least 1 hour to obtain 59.15% of waterborne polyurethane dispersant with effective components; 690g of the solution were then added
Na+SO3 --NH-capping agent
Aminosulfonic acid sodium salt
Water was added to the reaction solution, and the system pH was adjusted to 9 to obtain an aqueous solution SA1 of an aqueous polyurethane dispersant containing 35% of an active ingredient. SA1 includes compounds with molecular structures of structure A, structure B and structure C.
Example 2
Introducing nitrogen into a reaction bottle provided with a condensation reflux device, and adding a solvent 409.2g of dimethyl sulfoxide at normal temperature; then 52g of polycaprolactone diol (Mw 500), 4g of diaminopentanoic acid, 0.3g of tetrabutyltitanate and 480g of polyethylene glycol (Mw 7000) were mixed and heated to 60 ℃ with stirring; adding 53g of diphenylmethane diisocyanate into a reaction bottle, heating to 90 ℃ to accelerate the reaction until the concentration of isocyanate groups (NCO) is lower than 5%, and finally adding 1.5g of sodium bisulfite to react for at least 1 hour to obtain 59.08% of waterborne polyurethane dispersant with active ingredients; then, 714g of water was added thereto, and the system pH was adjusted to 9, to obtain an aqueous solution SA2 of an aqueous polyurethane dispersant containing 35% of an active ingredient. SA2 includes compounds having the molecular structures Structure D, Structure E, and Structure F.
Example 3
Introducing nitrogen into a reaction bottle provided with a condensing reflux device, and adding 406.6g of sulfolane as a solvent at normal temperature; then 110g of polycarbonate diol (Mw ═ 500), 6g of dimethylolbutyric acid, 0.3g of dibutyltin diacetate and 350g of polyethylene glycol (Mw ═ 2000) were mixed and heated to 70 ℃ with stirring; adding 121g of dimethyl biphenyl diisocyanate into a reaction bottle, heating to 100 ℃ to accelerate the reaction until the concentration of isocyanate (NCO) is lower than 5%, and finally adding 4.1g of sodium hydroxymethyl sulfonate to react for at least 1 hour to obtain a waterborne polyurethane dispersant with 59.34% of effective components; 695.4g of water was added thereto, and the pH of the system was adjusted to 9 to obtain an aqueous solution SA3 of an aqueous polyurethane dispersant containing 35% of an active ingredient.
Example 4
Mixing 508g of aqueous polyurethane dispersant solution SA1 (equivalent to 8.89 percent of active ingredient) with 1092g of deionized water, and stirring until the aqueous polyurethane dispersant solution is completely dissolved to obtain an aqueous pre-solution; then 400g of blue 359 disperse dye is mixed with the aqueous pre-solution, and the mixture is stirred to ensure that the disperse dye is completely wetted to obtain an aqueous pre-dispersion liquid; introducing the aqueous pre-dispersion liquid into a sand mill for grinding until the average particle size is 100-150 nm; filtering to remove the colloid and large particle size, and obtaining the color paste for textile digital printing with stable dispersion.
Example 5
602g of aqueous polyurethane dispersant aqueous solution SA2 (equivalent to 10.54 percent of active ingredient) is mixed with 998g of deionized water, and the mixture is stirred until the aqueous polyurethane dispersant aqueous solution SA2 and the deionized water are completely dissolved to obtain an aqueous pre-solution; then mixing 400g of red 60 disperse dye with the aqueous pre-solution, and stirring to completely wet the disperse dye to obtain an aqueous pre-dispersion solution; introducing the aqueous pre-dispersion liquid into a sand mill for grinding until the average particle size is 100-150 nm; filtering to remove the colloid and large particle size, and obtaining the color paste for textile digital printing with stable dispersion.
Example 6
618g of the aqueous solution SA3 (equivalent to 10.82 percent of the active ingredient) of the aqueous polyurethane dispersant is mixed with 982g of deionized water, and the mixture is stirred until the mixture is completely dissolved to obtain an aqueous pre-solution; then mixing 400g of yellow 54 disperse dye with the aqueous pre-solution, and stirring to completely wet the disperse dye to obtain an aqueous pre-dispersion liquid; introducing the aqueous pre-dispersion liquid into a sand mill for grinding until the average particle size is 100-150 nm; filtering to remove the colloid and large particle size, and obtaining the color paste for textile digital printing with stable dispersion.
Example 7
1150g of the aqueous solution SA3 (equivalent to 20.13 percent of the active ingredient) of the aqueous polyurethane dispersant is mixed with 450g of deionized water, and the mixture is stirred until the mixture is completely dissolved to obtain an aqueous pre-solution; then mixing 400g of brown 27 disperse dye with the aqueous pre-solution, and stirring to completely wet the disperse dye to obtain an aqueous pre-dispersion liquid; introducing the aqueous pre-dispersion liquid into a sand mill for grinding until the average particle size is 100-150 nm; filtering to remove the colloid and large particle size, and obtaining the color paste for textile digital printing with stable dispersion.
Comparative example 1
Introducing nitrogen into a reaction bottle provided with a condensing reflux device, and adding 408g of methyl pyrrolidone serving as a solvent at normal temperature; then 39g of polytetrahydrofuran diol (Mw 250), 8g of tartaric acid, 0.3g of dibutyltin dilaurate and 500g of polycaprolactone diol (Mw 5000) were mixed and heated to 60 ℃ with stirring; then adding 42g of naphthalene diisocyanate into a reaction bottle, heating to 100 ℃ to accelerate the reaction until the concentration of isocyanate group (NCO) is lower than 5%, and finally adding 2.7g of sodium sulfamate to react for at least 1 hour to obtain a dispersant solution with 60% of effective components; then, 691g of water was added thereto, and the system pH was adjusted to 9, to obtain an aqueous solution SA4 of a dispersant containing 35% of the active ingredient.
Comparative example 2
Mixing 200g of Lubozun W100 dispersant (equivalent to 10 percent of effective component) with 1400g of deionized water, and stirring until the dispersant is completely dissolved to obtain an aqueous pre-solution; then mixing 400g of red 60 disperse dye with the aqueous pre-solution, and stirring to completely wet the disperse dye to obtain an aqueous pre-dispersion solution; and (3) introducing the aqueous pre-dispersion liquid into a sand mill for grinding, and filtering to remove colloid and large particle size to obtain the contrast color paste.
Comparative example 3
Mixing 508g of multi-element structure dispersant aqueous solution SA4 (equivalent to 8.89 percent of active ingredient) with 1092g of deionized water, and stirring until the mixture is completely dissolved to obtain an aqueous pre-solution; then 400g of blue 359 disperse dye is mixed with the aqueous pre-solution, and the mixture is stirred to ensure that the disperse dye is completely wetted to obtain an aqueous pre-dispersion liquid; and (3) introducing the aqueous pre-dispersion liquid into a sand mill for grinding, and filtering to remove colloid and large particle size to obtain the contrast color paste.
Stability test
Firstly, preparing an ink combined liquid sample for stability test. The preparation method of the ink composition liquid is to dilute the color paste by 5 times by using 15% glycerol aqueous solution. And then, carrying out particle size, viscosity, surface tension, filterability and aging tests on the ink composition liquid. Particle size was measured using a Marvin (Malvern) Nano S90 nanosize particle sizer in British. Viscosity was measured using a Wells cone and plate viscometer, Bohler fly (Brookfield). Surface tension test, Japan synergy (KYOWA) CBVP type surface tensiometer. And (4) testing the filterability, namely filtering by adopting a glass fiber filter membrane with the aperture of 1.0 mu m and a PP filter membrane with the aperture of 0.45 mu m. And (3) testing the stability, namely aging for 7 days at the high temperature of 60 ℃, and testing the particle size, viscosity, surface tension and filterability after aging. The test results are shown in table 1, wherein the QC evaluation criteria: the average particle size is 100-200nm, the viscosity is 3-6cp, the surface tension is 35-45dyn/cm, and the filtering property is less than 15 min/kg; and (3) testing the stability, aging at the high temperature of 60 ℃ for 7 days, wherein the particle size change is less than 10%, the surface tension change is less than 5%, the viscosity change is less than 10%, the filterability is less than 15min/kg, the product is qualified OK, and otherwise, the product is NG.
TABLE 1 stability of inks obtained in examples 1 to 4 and comparative example 1
As can be seen from the test results in Table 1: the color paste for textile digital printing provided by the invention has good stability, and the prepared ink has good stability after aging for 7 days, and the particle size, viscosity, surface tension and filterability are still good.
Claims (6)
1. The waterborne polyurethane dispersant is characterized by being mainly prepared from the following raw materials in parts by weight:
3-20 parts of hydrophobic monomer
5-20 parts of anchoring monomer
30-60 parts of hydrophilic monomer
0.01 to 0.5 portion of catalyst
0.1 to 1 portion of end capping agent
30-50 parts of a solvent;
the hydrophobic monomer is at least one of polytetrahydrofuran diol, polycarbonate diol or polycaprolactone diol; the hydrophilic monomer is polyethylene glycol and a chain extender;
the anchoring monomer is at least one of diphenylmethane diisocyanate, dimethylbiphenyl diisocyanate or naphthalene diisocyanate;
the chain extender is one or more of tartaric acid, dimethylolpropionic acid, dimethylolbutyric acid, diaminobenzoic acid, diaminopentanoic acid, diaminohexanoic acid, 1, 2-propanediol-3-sulfonate or 1, 4-butanediol-2-sulfonate;
the molecular weight of the polyethylene glycol monomer is 1000-10000.
2. The aqueous polyurethane dispersant of claim 1, wherein the molecular weight of said hydrophobic monomer is 100-.
3. The method for preparing the aqueous polyurethane dispersant of any one of claims 1 to 2, characterized by comprising the steps of:
(1) under the state of protective atmosphere, adding the hydrophilic monomer, the hydrophobic monomer and the catalyst into the solvent, and mixing to obtain a mixture A;
(2) heating the mixture A, and adding the anchoring monomer to obtain a mixture B;
(3) and heating the mixture B, reacting, and adding an end-capping reagent to react to obtain the waterborne polyurethane dispersant.
4. The color paste for textile digital printing is characterized by comprising the following components in parts by weight: 50-90 parts of water, 10-50 parts of dye and 5-25 parts of the aqueous polyurethane dispersant as defined in any one of claims 1-2.
5. The color paste according to claim 4, further comprising 0-25 parts of a cosolvent and/or 0-5 parts of a wetting agent.
6. An ink comprising the color paste according to claim 4 or 5.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010305300.6A CN111574682B (en) | 2020-04-17 | 2020-04-17 | Waterborne polyurethane dispersant and color paste containing same for textile digital printing |
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