US2755203A - Process of converting a polyamino-triarylmethane dye coating on a base from a stabilized leuco form to a colored form - Google Patents
Process of converting a polyamino-triarylmethane dye coating on a base from a stabilized leuco form to a colored form Download PDFInfo
- Publication number
- US2755203A US2755203A US456880A US45688054A US2755203A US 2755203 A US2755203 A US 2755203A US 456880 A US456880 A US 456880A US 45688054 A US45688054 A US 45688054A US 2755203 A US2755203 A US 2755203A
- Authority
- US
- United States
- Prior art keywords
- leuco
- stabilized
- converting
- paper
- methane
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 26
- 230000008569 process Effects 0.000 title claims description 17
- 239000001003 triarylmethane dye Substances 0.000 title claims description 6
- 238000000576 coating method Methods 0.000 title description 7
- 239000011248 coating agent Substances 0.000 title description 6
- QTWZICCBKBYHDM-UHFFFAOYSA-N leucomethylene blue Chemical compound C1=C(N(C)C)C=C2SC3=CC(N(C)C)=CC=C3NC2=C1 QTWZICCBKBYHDM-UHFFFAOYSA-N 0.000 title description 6
- 150000001875 compounds Chemical class 0.000 claims description 21
- -1 methane compound Chemical class 0.000 description 36
- 239000000203 mixture Substances 0.000 description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 15
- 239000000975 dye Substances 0.000 description 15
- 239000003795 chemical substances by application Substances 0.000 description 12
- 238000009472 formulation Methods 0.000 description 12
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000013078 crystal Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- UGNWTBMOAKPKBL-UHFFFAOYSA-N tetrachloro-1,4-benzoquinone Chemical compound ClC1=C(Cl)C(=O)C(Cl)=C(Cl)C1=O UGNWTBMOAKPKBL-UHFFFAOYSA-N 0.000 description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000001993 wax Substances 0.000 description 5
- 125000000217 alkyl group Chemical group 0.000 description 4
- JVICFMRAVNKDOE-UHFFFAOYSA-M ethyl violet Chemical compound [Cl-].C1=CC(N(CC)CC)=CC=C1C(C=1C=CC(=CC=1)N(CC)CC)=C1C=CC(=[N+](CC)CC)C=C1 JVICFMRAVNKDOE-UHFFFAOYSA-M 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 description 3
- 230000001476 alcoholic effect Effects 0.000 description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 239000008199 coating composition Substances 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 125000004433 nitrogen atom Chemical group N* 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 125000001453 quaternary ammonium group Chemical group 0.000 description 3
- JBWKIWSBJXDJDT-UHFFFAOYSA-N triphenylmethyl chloride Chemical class C=1C=CC=CC=1C(C=1C=CC=CC=1)(Cl)C1=CC=CC=C1 JBWKIWSBJXDJDT-UHFFFAOYSA-N 0.000 description 3
- JCARTGJGWCGSSU-UHFFFAOYSA-N 2,6-dichlorobenzoquinone Chemical compound ClC1=CC(=O)C=C(Cl)C1=O JCARTGJGWCGSSU-UHFFFAOYSA-N 0.000 description 2
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 2
- QZRGKCOWNLSUDK-UHFFFAOYSA-N Iodochlorine Chemical compound ICl QZRGKCOWNLSUDK-UHFFFAOYSA-N 0.000 description 2
- OAZWDJGLIYNYMU-UHFFFAOYSA-N Leucocrystal Violet Chemical compound C1=CC(N(C)C)=CC=C1C(C=1C=CC(=CC=1)N(C)C)C1=CC=C(N(C)C)C=C1 OAZWDJGLIYNYMU-UHFFFAOYSA-N 0.000 description 2
- 239000004264 Petrolatum Substances 0.000 description 2
- 239000000908 ammonium hydroxide Substances 0.000 description 2
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 125000004188 dichlorophenyl group Chemical group 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 229940066842 petrolatum Drugs 0.000 description 2
- 235000019271 petrolatum Nutrition 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 125000003944 tolyl group Chemical group 0.000 description 2
- JEVGKYBUANQAKG-UHFFFAOYSA-N victoria blue R Chemical compound [Cl-].C12=CC=CC=C2C(=[NH+]CC)C=CC1=C(C=1C=CC(=CC=1)N(C)C)C1=CC=C(N(C)C)C=C1 JEVGKYBUANQAKG-UHFFFAOYSA-N 0.000 description 2
- 150000004057 1,4-benzoquinones Chemical class 0.000 description 1
- GVFFTNKHIUHXRJ-UHFFFAOYSA-N 18-methylnonadecyl(oxido)azanium Chemical class CC(C)CCCCCCCCCCCCCCCCC[NH2+][O-] GVFFTNKHIUHXRJ-UHFFFAOYSA-N 0.000 description 1
- UIJPWDSKPZLJAN-UHFFFAOYSA-N 2-(1,4-dioxan-2-yl)ethanol Chemical compound OCCC1COCCO1 UIJPWDSKPZLJAN-UHFFFAOYSA-N 0.000 description 1
- VTWDKFNVVLAELH-UHFFFAOYSA-N 2-methylcyclohexa-2,5-diene-1,4-dione Chemical class CC1=CC(=O)C=CC1=O VTWDKFNVVLAELH-UHFFFAOYSA-N 0.000 description 1
- AXDJCCTWPBKUKL-UHFFFAOYSA-N 4-[(4-aminophenyl)-(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]aniline;hydron;chloride Chemical compound Cl.C1=CC(=N)C(C)=CC1=C(C=1C=CC(N)=CC=1)C1=CC=C(N)C=C1 AXDJCCTWPBKUKL-UHFFFAOYSA-N 0.000 description 1
- QHPQWRBYOIRBIT-UHFFFAOYSA-N 4-tert-butylphenol Chemical compound CC(C)(C)C1=CC=C(O)C=C1 QHPQWRBYOIRBIT-UHFFFAOYSA-N 0.000 description 1
- 102000009027 Albumins Human genes 0.000 description 1
- 108010088751 Albumins Proteins 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- 108010076119 Caseins Proteins 0.000 description 1
- 229940126062 Compound A Drugs 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- PVMCZARCGOKSGF-UHFFFAOYSA-N N(Cl)Cl.ClC=1C(C(=CC(C1)=O)Cl)=O Chemical compound N(Cl)Cl.ClC=1C(C(=CC(C1)=O)Cl)=O PVMCZARCGOKSGF-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 1
- 125000000066 S-methyl group Chemical group [H]C([H])([H])S* 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- 235000012544 Viola sororia Nutrition 0.000 description 1
- 241001106476 Violaceae Species 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- CEGOLXSVJUTHNZ-UHFFFAOYSA-K aluminium tristearate Chemical compound [Al+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CEGOLXSVJUTHNZ-UHFFFAOYSA-K 0.000 description 1
- 229940063655 aluminum stearate Drugs 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 150000007514 bases Chemical class 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000001045 blue dye Substances 0.000 description 1
- 239000001049 brown dye Substances 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 239000004203 carnauba wax Substances 0.000 description 1
- 235000013869 carnauba wax Nutrition 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical class ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- ZXJXZNDDNMQXFV-UHFFFAOYSA-M crystal violet Chemical compound [Cl-].C1=CC(N(C)C)=CC=C1[C+](C=1C=CC(=CC=1)N(C)C)C1=CC=C(N(C)C)C=C1 ZXJXZNDDNMQXFV-UHFFFAOYSA-M 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- IPSIPYMEZZPCPY-UHFFFAOYSA-N new fuchsin Chemical compound [Cl-].C1=CC(=[NH2+])C(C)=CC1=C(C=1C=C(C)C(N)=CC=1)C1=CC=C(N)C(C)=C1 IPSIPYMEZZPCPY-UHFFFAOYSA-N 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000007539 photo-oxidation reaction Methods 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 150000003254 radicals Chemical group 0.000 description 1
- 239000001044 red dye Substances 0.000 description 1
- 230000033458 reproduction Effects 0.000 description 1
- OARRHUQTFTUEOS-UHFFFAOYSA-N safranin Chemical compound [Cl-].C=12C=C(N)C(C)=CC2=NC2=CC(C)=C(N)C=C2[N+]=1C1=CC=CC=C1 OARRHUQTFTUEOS-UHFFFAOYSA-N 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- JMCKWTQLJNQCTD-UHFFFAOYSA-N spirit blue Chemical compound Cl.C=1C=C(C(=C2C=CC(C=C2)=NC=2C=CC=CC=2)C=2C=CC(NC=3C=CC=CC=3)=CC=2)C=CC=1NC1=CC=CC=C1 JMCKWTQLJNQCTD-UHFFFAOYSA-N 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- LLWJPGAKXJBKKA-UHFFFAOYSA-N victoria blue B Chemical compound [Cl-].C1=CC(N(C)C)=CC=C1C(C=1C=CC(=CC=1)N(C)C)=C(C=C1)C2=CC=CC=C2C1=[NH+]C1=CC=CC=C1 LLWJPGAKXJBKKA-UHFFFAOYSA-N 0.000 description 1
- ROVRRJSRRSGUOL-UHFFFAOYSA-N victoria blue bo Chemical compound [Cl-].C12=CC=CC=C2C(NCC)=CC=C1C(C=1C=CC(=CC=1)N(CC)CC)=C1C=CC(=[N+](CC)CC)C=C1 ROVRRJSRRSGUOL-UHFFFAOYSA-N 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
- 239000001043 yellow dye Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B11/00—Diaryl- or thriarylmethane dyes
- C09B11/04—Diaryl- or thriarylmethane dyes derived from triarylmethanes, i.e. central C-atom is substituted by amino, cyano, alkyl
- C09B11/10—Amino derivatives of triarylmethanes
- C09B11/12—Amino derivatives of triarylmethanes without any OH group bound to an aryl nucleus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
- B41M5/0253—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet using a chemical colour-forming ink, e.g. chemical hectography
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S101/00—Printing
- Y10S101/29—Printing involving a color-forming phenomenon
Definitions
- This invention relates to a method of converting or developing certain colorless leuco triarylmethanes into their colored forms in a duplication process, such as the hectograph method.
- Crystal violet and similar dyes are used to a large extent for the manufacture of carbon paper for the spirit hectograph duplication process.
- This carbon is prepared by incorporating the color into a vehicle containing waxes, oils and other special-purpose ingredients.
- the method of duplication consists first of making a master sheet by typing or Writing on glazed paper under which a sheet of the spirit hectograph carbon is placed with the waxed side facing up so that a mirror image of the written matter is formed on the underside of the master sheet.
- This master sheet is then placed on a rotatable drum in a duplicating machine. Prints are formed on the machine by pressing the master sheet against sheets of copy paper which is moistened with an alcoholic or spirit solvent. Only a small portion of the dye is removed when each print is made.
- the present invention relates to a new and improved method of developing or converting the stabilized leuco form of the dye into its colored form.
- This development may be accomplished in various ways although one of the simplest and more convenient methods is to incorporate the developing agent in the alcoholic solvent which is used to moisten the roller of the duplicating machine.
- the compound is stabilized with about 2% to 10% of a quaternary ammonium hydroxide, i. e., enough to give it a pH of about 8 or higher as measured in a 1% solution or suspension thereof at room temperature in 95% ethanol which normally has a pH of about 7.5.
- the color of the formulation is developed by contacting it with a developer which is oxidizing and acid relative to the leuco form of the triarylmethane. That is, the nature of the developer is such that when in contact with the leuco, the developer acts as an electron acceptor. Under these conditions, the leuco base acts at the point of contact as an electron donor While it is being converted into its more highly polarized quinonoid conjugated form. Thus the developer oxidizes the leuco to the carbinol form and then converts the carbinol to the dye cation.
- a quaternary ammonium hydroxide i. e., enough to give it a pH of about 8 or higher as measured in a
- the vehicles used in the formulations may be conventional or special but usually are composed of oils and waxes either of animal or vegetable origin. Other agents are usually added to improve the transferring properties of the formulation and may include plasticizers, hygroscopic control substances, and similar agents.
- the percentage of leuco in the formulation is relatively immaterial provided sufiicient developing agent is present to develop the color on the copy sheet, whether a small amount of leuco, such as 5% to 20%, is present as in the coating for one-time carbon papers, or up to as is commonly used inspirit hectograph paper.
- leuco triarylmethanes used in duplicating systems incorporating the present invention are those described in the above-mentioned copending application and its parent application, preferably the stabilized leuco ethyl violet and stabilized p chlorophenyl bis (p dimethylaminophenyl) methane.
- the dyes which may be used in addition to these compounds may be mentioned the stabilized form of the following:
- leuco derivative Z-methyl leuco crystal violet Z-methyl leuco ethyl violet S-methyl 2-dimethylaminophenyl-bis(p-dimethylaminophenyl) methane 2,2-dimethyl leuco crystal violet Pentamethyl paraleucaniline (main component in leuco methyl violet, the reduction product of the commercial dye of C. I. 680) p-Ethyl-sec. butylaminophenyl-bis(dimethylaminophenyl) methane Tris(pbenzylaminophenyl) methane Diphenylated paraleucaniline (the reduction product of .Spirit Blue 213, C.'I.
- leuco derivative 1-p-dimethylaminonaphthyl-bis(p-dimethylaminophenyl) methane The ethyl analogues of the N-methylated leuco Victoria blue dyes may alsobe used with advantage in many cases since they have lowermelting points and are more compatible in waxy vehicles.
- shading dyes such as oil yellow N, C. I. 19, phthaloperinone, safranine T base, C. I. 841, oil scarlet C. I. 73 (Sudan II), oil red, C. I. 258, and other similar yellow, red, and brown dyes may be used as shading dyes to produce black shades from the above-listed stabilized dyes.
- Useful shading components must retain their original shades during development with chloranil and similar developing and oxidizing agents, they must be soluble in solvents such as alcohol or dioxane, and must be compatible with the oily or waxy vehicle used in the transfer medium.
- the invention is not restricted to any special formulations used to coat the master sheet, it has been found that the above leuco compounds retain their stability if certain basic compounds are aded to the formulation, such as quaternary ammonium hydroxides, tertiary amine oxides, such as dimethylstearylamine oxides and aliphatic amines. These formulations are also improved if certain gasoline or rubber-anti-oxidants are incorporated to prevent or retard the discoloration of the leuco compound due to oxidation prior to the color development step.
- the color development on the final copy sheets in spirit hectograph work is achieved by bringing the transferred leuco in close contact with an oxidizing agent in the presence of an acid or with a compound which acts like an acid in the presence ofmoistening medium, such as alcohol, dioxane, or other polar solvents.
- an oxidizing agent in the presence of an acid or with a compound which acts like an acid in the presence ofmoistening medium, such as alcohol, dioxane, or other polar solvents.
- a preferred developer is, in most cases, a compound in which both of these essential functions for color development are combined in 'the same compound. 'Many oxidizing agents perform these dual functions.
- Chloranil and related halogenated benzoquinone or toluquinone compounds including their haloimide derivatives, such as 2,6-dichlorobenzoquinone chlorimide, and benzoyl peroxide (or aliphatic acid peroxides) are examples of such preferred compounds which have good solubility in the above solvents.
- Triphenylchloromethane type compounds also serve wellasdevelopers when radiatnt heat is applied to the-surface of the final copy sheet. I have found that under these conditions triarylchloromethane type developers oxidize the leuco and at the same time produce in situ the standard chloride salt of the color while the developeritself'is reduced simultaneously to the corresponding triarylmethane compound according to the following probable reaction:
- the above-mentioned and other types of solid developers can also be incorporated in the paper, or deposited on the surface of the paper sheets, which are to be used for producing the final copies.
- This can conveniently be done by adding the compounds in the form of water-dispersible pastes or powders (made by viscous milling an aqueous slurry or paste of the original compound with a large amount of dispersing agents) to the pulp inthe manufacture of such paper sheets which, with the conventional duplicating devices and techniques, give directly the developed color on the final copies.
- Certain inorganic developers such as iodine monochloride and other readily available iodohalides which are volatile liquids at room temperature, and which are very highly soluble in organic solvents, also are very effective developers.
- Some gaseous developers such as nitrous acid or N0: gas, and compounds which furnish oxidizing and acidic gases in a nascent state, such as the alkyl nitriles, also are useful developers for these leuco compoundswhen they are used in specially designed duplication devices.
- novel, leuco-base compositions of the mentioned colors are ideally adapted for the purposes hereinabove discussed, that is, production of nonstaining coatings on transfer media for spirit duplication processes and impact printing.
- Example I A hectograph paper coating mass was prepared by adding the required amount of the stabilized leuco ethyl violet, which may be made according to Example 1 of the above-mentioned application Serial No. 456,887, to the molten mixture of the other ingredients in a beaker while the mass was kept at approximately 100 C.
- the highly fluid and colorless coating formulation so produced had the following composition:
- Example II Satisfactory spirit hectograph duplication also resulted when the following developer solutions were substituted for the dioxane-ethanol solution of chloranil in the procedure of Example 1 and with many other stabilized triphenylmethane dyes falling within the above formula:
- Example III A one-time paper for impact copy printing was prepared by coating a sheet of high-quality tissue paper with the following formulation:
- the coating composition thus obtained showed good fluidity at steam bath temperature.
- a sheet of ordinary paper was then coated with this mass and used in the same manner as ordinary carbon paper. It showed excellent transfer properties, producing on a typewriter or with a stylus or pencil colorless carbon copies which were readily developed in situ to a very strong crystal violet shade when the surface of the originally colorless copy sheet was slightly wetted with 1% solution of chloranil in dioxane.
- Example IV One part by weight of the dry stabilized leuco crystal violet of Example III was thoroughly mixed with 0.5 part of triphenylchloromethane to give a colorless powder with which the surface of a paper sheet was coated by working some of the powder with a spatula into the pores of the paper surface. The excess powder was then removed by turning the paper upside down and a metal stencil was placed over the coated paper. Exposure of this system to a source of radiant heat (holding it over an electrically heated hot plate or under an infrarad heating bulb) produced instantaneously a permanently fixed, very strong and sharp pattern in which the shielded areas (underneath the metal) had remained white while all the directly exposed area showed a deep violet-blue coloration.
- a source of radiant heat holding it over an electrically heated hot plate or under an infrarad heating bulb
- the powders mentioned in Example IV may be incorporated in a binder such as gelatin, casein, albumin, starch, and dextrin.
- a binder such as gelatin, casein, albumin, starch, and dextrin.
- any of the above disclosed stabilized leuco compounds may be used in combination. If a black or shade approaching black is desired, a mixture of a green with a violet or blue together with a yellow, orange, brown, or red shading color should be selected. Some mixtures of this type are disclosed and illustrated in the above-mentioned copending application.
- the present invention offers many advantages over the prior art.
- the final color of the dye is rapidly and completely developed on the copy paper.
- the present invention offers a method which makes the compositions containing stabilized leuco triarylmethane dyes practical.
- An other advantage is that as many as 650 readable copies may be made from one master sheet.
- X designates a member of the group consisting. of hydrogen and methyl; wherein R is a radical of the group consisting of phenyl, tolyl, xyly1, mononitrophenyl, monoand dichloro-phenyl, aminophenyl, aminotolyl, monoacetylaminophenyl, -lp-phenylamino-naphthyl, and l-pmonoalkylaminoand diaikylamino-naphthy], and wherein the N-atoms of said aminophenyland aminotolylradicals and the N-atoms shown in the formula above in para position to the CH group have theirseeoud and third valencies satisfied bymembersof the group.
- leucocompound consisting of hydrogen, alkyl ofless than'S carbon atoms, .2-hydroxyethyl, Z-cyanoethyl, benzyl andphcnyl, said leucocompound beingdevoid of sulfo, carboxy;.and,phenolic.hydroxvgmups. and being in a state of purity whereby it is essentially free of color, and said leuco compound being Cflfitained within the bounds of.
- a 'symbol impninted upon a supporting sheet and havingincorporated therewith a quatemaryammonium hydroxideiin quantity amounting to i from 0.2% to 10% by weight of said leuco compound the improvement which comprises contacting the saidsymbol with an oxidizing developer selected from the group consisting of halogenated monocyclic quinones, the corresponding halo irnides, carboxylieacidmeroxides, triaryl chlormethanes, alkyl .nitriles, volatile liquid io'dohalides, and nitrogen oxides.
- an oxidizing developer selected from the group consisting of halogenated monocyclic quinones, the corresponding halo irnides, carboxylieacidmeroxides, triaryl chlormethanes, alkyl .nitriles, volatile liquid io'dohalides, and nitrogen oxides.
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- Chemical & Material Sciences (AREA)
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- Color Printing (AREA)
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Description
United States PatentOfice A 2,755,203 Patented July 17, 1956 PROCESS OF CONVERTING A POLYAMINO-TRI- ARYLMETHANE DYE COATING ON A BASE FROM A STABILIZED LEUCO FORM TO A COLORED FORM Otto Stallmann, Bridgeton, N. J., assignor to E. I. du Pont de Nemours and Company, Wilmington, Del., a corporation of Delaware No Drawing. Application September 17, 1954, Serial No. 456,880
8 Claims. (Cl. 117--37) This invention relates to a method of converting or developing certain colorless leuco triarylmethanes into their colored forms in a duplication process, such as the hectograph method.
Crystal violet and similar dyes are used to a large extent for the manufacture of carbon paper for the spirit hectograph duplication process. This carbon is prepared by incorporating the color into a vehicle containing waxes, oils and other special-purpose ingredients. The method of duplication consists first of making a master sheet by typing or Writing on glazed paper under which a sheet of the spirit hectograph carbon is placed with the waxed side facing up so that a mirror image of the written matter is formed on the underside of the master sheet. This master sheet is then placed on a rotatable drum in a duplicating machine. Prints are formed on the machine by pressing the master sheet against sheets of copy paper which is moistened with an alcoholic or spirit solvent. Only a small portion of the dye is removed when each print is made.
The difficulty of handling the intensely colored crystal violet compositions is well known since even with the greatest care the fingers and clothing become stained with the dye. In the copending application of Balon and Stallmann, Serial No. 456,887, filed on even date herewith, these diificulties are avoided by providing a stabilized leuco base of certain triarylmethanes and incorporating them in a hectograph vehicle which is used for coating the master sheet.
The present invention relates to a new and improved method of developing or converting the stabilized leuco form of the dye into its colored form. This development may be accomplished in various ways although one of the simplest and more convenient methods is to incorporate the developing agent in the alcoholic solvent which is used to moisten the roller of the duplicating machine.
It is an object'of the present invention to provide a simple and economical means of converting or developing the leuco form to the colored form of triarylmethane dyes described in the above-mentioned application. Another object is the provision of a developing system which may be incorporated into the alcoholic solvent used in standard spirit duplicating machines. Other objects will be apparent as the description of the invention proceeds.
These and other objects are accomplished by converting from a stabilized leuco form to a color form, a wax formulation containing from about 2% to 60% by weight of a triaryl methane compound selected from the group consisting of the diaminoand triaminotriaryl methanes of the formula:
group consisting of phenyl, tolyl, xylyl, mononitroph'enyl,
monoand dichloro-phenyl, aminophenyl, aminotolyl, monoacetylaminophenyl, l-p-phenylamino-naphthyl, l-pmonoalkylamino and dialkylarnino-naphthyl, and wherein the N-ato'ms of said amino-phenyl and aminotolyl radicals and the N-atoms shown in the formula above in para position to the CH group have their second and third valencies satisfied by members of the group consisting of hydrogen, alltyl of less than 5 carbon atoms, 2-hydroxyethyl, Z-cyanoethyl, benzyl and phenyl, said leuco compound being devoid of sulfo, carboxy and phenolic hydroxyl groups and being in a state of purity whereby it is essentially free of color, and being associated with a quaternary ammonium hydroxide in sufiicient quantity to stabilize said compound against conversion into color by photochemical oxidation during exposure to the atmosphere. The alkyl groups in each of the above classes should contain fewer than 5 carbon atoms. I
The compound is stabilized with about 2% to 10% of a quaternary ammonium hydroxide, i. e., enough to give it a pH of about 8 or higher as measured in a 1% solution or suspension thereof at room temperature in 95% ethanol which normally has a pH of about 7.5. The color of the formulation is developed by contacting it with a developer which is oxidizing and acid relative to the leuco form of the triarylmethane. That is, the nature of the developer is such that when in contact with the leuco, the developer acts as an electron acceptor. Under these conditions, the leuco base acts at the point of contact as an electron donor While it is being converted into its more highly polarized quinonoid conjugated form. Thus the developer oxidizes the leuco to the carbinol form and then converts the carbinol to the dye cation.
The vehicles used in the formulations may be conventional or special but usually are composed of oils and waxes either of animal or vegetable origin. Other agents are usually added to improve the transferring properties of the formulation and may include plasticizers, hygroscopic control substances, and similar agents. The percentage of leuco in the formulation is relatively immaterial provided sufiicient developing agent is present to develop the color on the copy sheet, whether a small amount of leuco, such as 5% to 20%, is present as in the coating for one-time carbon papers, or up to as is commonly used inspirit hectograph paper.
The leuco triarylmethanes used in duplicating systems incorporating the present invention are those described in the above-mentioned copending application and its parent application, preferably the stabilized leuco ethyl violet and stabilized p chlorophenyl bis (p dimethylaminophenyl) methane. Among the dyes which may be used in addition to these compounds may be mentioned the stabilized form of the following:
Crystal Violet, C. I. 681, leuco derivative 3,3'-dimethyl derivative of leuco ethyl violet p Diethylaminophenyl' bis(benzylethylaminophenyl) methane p Diethylaminophenyl bis(3 methyl 4 ethyl [3 p Ethyl methylaminophenyl bis(p di n butyl v aminophenyl) methane p Methyl p cyanoethylaminophenyl bis (p di n butylaminophenyl) methane Victoria pure blue BO, U. S. 2,422,445, leuco derivative Phenyl-bis(p-ethyl-benzylaminophenyl) methane o-Chlorophenyl-bis(p diethytarninophenyl) 'rnethane p-Chlorophenyl bis(p-ethyl-benzylaminophenyl) methane Brilliant Green, C. L662, leuco derivative New Fuchsine, C. I. 678,-leuco derivative Paraleucaniline Fuchsine, C. I. 677, leuco derivative Z-methyl leuco crystal violet Z-methyl leuco ethyl violet S-methyl 2-dimethylaminophenyl-bis(p-dimethylaminophenyl) methane 2,2-dimethyl leuco crystal violet Pentamethyl paraleucaniline (main component in leuco methyl violet, the reduction product of the commercial dye of C. I. 680) p-Ethyl-sec. butylaminophenyl-bis(dimethylaminophenyl) methane Tris(pbenzylaminophenyl) methane Diphenylated paraleucaniline (the reduction product of .Spirit Blue 213, C.'I. 689) p-Aminophenyl-bis diethylaminophenyl) methane p-Acetylaminophenyl-bis(p-dimethylaminophenyl) methane p-Methylacetylaminophenylbis(p-dimethylaminophenyl) methane Z-methylphenyl-bis(p-dimethylaminophenyl) methane 4 methyl 3 dimethylaminophenyl-bis(p-dirnethylaminophenyl) methane p-Nitrophenyl-bis(p-diethylaminophenyl) methane Victoria Blue R, C. I. 728, leuco derivative Victoria Blue B, C. I. 729, leuco derivative 1-p-dimethylaminonaphthyl-bis(p-dimethylaminophenyl) methane The ethyl analogues of the N-methylated leuco Victoria blue dyes may alsobe used with advantage in many cases since they have lowermelting points and are more compatible in waxy vehicles.
In addition to the above dyes, it is to be understood that shading dyes such as oil yellow N, C. I. 19, phthaloperinone, safranine T base, C. I. 841, oil scarlet C. I. 73 (Sudan II), oil red, C. I. 258, and other similar yellow, red, and brown dyes may be used as shading dyes to produce black shades from the above-listed stabilized dyes. Useful shading components must retain their original shades during development with chloranil and similar developing and oxidizing agents, they must be soluble in solvents such as alcohol or dioxane, and must be compatible with the oily or waxy vehicle used in the transfer medium. These shading compounds and their preparation and'use are disclosed more fully in the above-mentioned application of Balon and Stallmann.
While the invention is not restricted to any special formulations used to coat the master sheet, it has been found that the above leuco compounds retain their stability if certain basic compounds are aded to the formulation, such as quaternary ammonium hydroxides, tertiary amine oxides, such as dimethylstearylamine oxides and aliphatic amines. These formulations are also improved if certain gasoline or rubber-anti-oxidants are incorporated to prevent or retard the discoloration of the leuco compound due to oxidation prior to the color development step.
In general, the color development on the final copy sheets in spirit hectograph work is achieved by bringing the transferred leuco in close contact with an oxidizing agent in the presence of an acid or with a compound which acts like an acid in the presence ofmoistening medium, such as alcohol, dioxane, or other polar solvents. A preferred developer is, in most cases,a compound in which both of these essential functions for color development are combined in 'the same compound. 'Many oxidizing agents perform these dual functions. Chloranil and related halogenated benzoquinone or toluquinone compounds, including their haloimide derivatives, such as 2,6-dichlorobenzoquinone chlorimide, and benzoyl peroxide (or aliphatic acid peroxides) are examples of such preferred compounds which have good solubility in the above solvents. Triphenylchloromethane type compounds also serve wellasdevelopers when radiatnt heat is applied to the-surface of the final copy sheet. I have found that under these conditions triarylchloromethane type developers oxidize the leuco and at the same time produce in situ the standard chloride salt of the color while the developeritself'is reduced simultaneously to the corresponding triarylmethane compound according to the following probable reaction:
For either one-time carbon paper or spirit hectograph duplication, the above-mentioned and other types of solid developers can also be incorporated in the paper, or deposited on the surface of the paper sheets, which are to be used for producing the final copies. This can conveniently be done by adding the compounds in the form of water-dispersible pastes or powders (made by viscous milling an aqueous slurry or paste of the original compound with a large amount of dispersing agents) to the pulp inthe manufacture of such paper sheets which, with the conventional duplicating devices and techniques, give directly the developed color on the final copies.
Certain inorganic developers, such as iodine monochloride and other readily available iodohalides which are volatile liquids at room temperature, and which are very highly soluble in organic solvents, also are very effective developers. Some gaseous developers such as nitrous acid or N0: gas, and compounds which furnish oxidizing and acidic gases in a nascent state, such as the alkyl nitriles, also are useful developers for these leuco compoundswhen they are used in specially designed duplication devices.
In some cases satisfactory color development can be achieved by the use of an acid producing agent alone without a special oxidizing agent incorporated in the copy sheets. In this case use may also be made of a local photo-oxidation of the leuco by exposure to light and air oxygen. This color development (without theuse of specialoxidizing agents in the system) can be greatly accelerated by exposing for a few seconds the transferred leuco on the copy sheets to a source of radiant heat, or by incorporating, either in the solvent or in the coating composition or in the paper itself, catalytic amounts of a phenolic accelerator, such as p-t-butyl phenol.
Asa consequence, the novel, leuco-base compositions of the mentioned colors are ideally adapted for the purposes hereinabove discussed, that is, production of nonstaining coatings on transfer media for spirit duplication processes and impact printing.
There is no limitation placed on the method of making the leuco-base compositions to be developed by the present invention. Any of the methods and formulations described in the above-mentioned copending applications are satisfactory.
When the process of this application is applied to hectograph duplication to produce a violet copy, it is important that the shade .of the regenerated color appearing on the final copies does not deviate substantially from the violet shade which has become firmly established in the trade by many years. of'using crystalwviolet in duplicating devices. Spectrophotoruetric measurements have confirmed that many of the leuco compounds to which the process of this invention is-applicable and the dyes regenerated therefrom by the process of this-invention have the:same
significant light absorption peaks asflleuco crystal violet and crystal violet itself. The supporting data are as follows:
Main light absorption peaks Example N0. from Leuco Visible No. and Nature of Alkyl Groups Balon and U. V. (1L) Stallmann (A.)
App.
Hexamethy1 2 2, 625 6, 000 Hexaethyl 13 2, 725 6, 060 Tetrameth -d 5 2, 650 6,050 Hexa-n-butyl 6 2, 620 6, 120 D1ethyl-tetra-n-butyl 7 2, 720 6, 150 Methylethyl-tetra-n-butyl 8 2, 710 6, 150 D ethyl-di(ethyl-fi-hydroxyethyl) 9 5, 900 D ethyl-d1(1 nethy1-fl-eyauoethyl) 10 2, 625 5, 900 Drmethyl-dr(methyl-B-cyanoethyl) 11 2, 650 5, 900 Tetra-n-butyl-methyl-B-cyanoetl1yL 12 2, 550 6,100
Also contains a methyl group oto each N bearing a hydroxyethyl group.
b Satisfactory violets in range of about 5850-6200.
The following examples are given by way of illustration and no limitation is placed thereon since it will be apparent that any dye falling within the above class may be substituted in like amount for this given in the examples.
Example I A hectograph paper coating mass was prepared by adding the required amount of the stabilized leuco ethyl violet, which may be made according to Example 1 of the above-mentioned application Serial No. 456,887, to the molten mixture of the other ingredients in a beaker while the mass was kept at approximately 100 C. The highly fluid and colorless coating formulation so produced had the following composition:
30 parts high-melting stearylamine wax sold as AM-ll80 by Armour & Company parts petrolatum No. 5 (a commercial hard parafiin) 10 parts aluminum stearate 40 parts leuco compound A hectograph paper sheet was then coated with this formulation at 100 C. and a master copy was prepared in the conventional manner on a typewriter. The colorless master shee was then placed over the cylinder in a spirit duplicating machine in which the regular liquor had been replaced by a special developer prepared by diluting parts of a 1% solution of chloranil in dioxane with 75 parts of ethanol. A total of 650 copies were then run ofi' on the machine in the usual manner. Each copy was initially colorless but developed, almost immediately and without any further treatment, easily readable reproductions of the original type in a color similar to that produced from standard crystal violet. The last copy was as strong as the first copies.
When the amounts of stearylamine and petrolatum were reduced by 5 parts each, and 10 parts of triethanolamine were substituted for them, a thinner but equally useful hectograph formulation resulted.
Example II Satisfactory spirit hectograph duplication also resulted when the following developer solutions were substituted for the dioxane-ethanol solution of chloranil in the procedure of Example 1 and with many other stabilized triphenylmethane dyes falling within the above formula:
(a) 1.0% chloranil, 49.5% dioxane, 49.5 95 ethanol (b) 1.0% chloranil, 62.0% dioxane, 37.0% 95% ethanol (0) 1.2% chloranil, 82.3% tetrahydrofuran, 16.5% Cellosolve (d) 1.0% benzoyl peroxide, 99.0% 95% ethanol (e) 1.0% benzoyl peroxide, 99.0% isopropanol (f) 1.0% benzoyl peroxide, 99.0% t-butanol (g) 0.5% 2,4-dichlorobenzoyl peroxide, 99.5% t-butanol (h) 1.0% 2,5-dichloro-p-quinone, 49.5 dioxane, 49.5
% ethanol (i) 2.0% 2,6-dichloro-p-quinone chlorimide, 49.0% dioxane, 49.0% 95 ethanol (i) 1.0% iodine monochloride, 49.5% dioxane, 49.5%
ethanol (k) 1.0% 2,6-dichloro-p-quinone, 49.5% dioxane, 49.5
ethanol Example III A one-time paper for impact copy printing was prepared by coating a sheet of high-quality tissue paper with the following formulation:
1 part by weight of stabilized leuco crystal violet 4 parts by weight of a molten vehicle consisting of three parts of carnauba wax and 1 part of a commercial stearylamine wax known by the trade-name AM-1180 and marketed by Armour and Company.
The coating composition thus obtained showed good fluidity at steam bath temperature. A sheet of ordinary paper was then coated with this mass and used in the same manner as ordinary carbon paper. It showed excellent transfer properties, producing on a typewriter or with a stylus or pencil colorless carbon copies which were readily developed in situ to a very strong crystal violet shade when the surface of the originally colorless copy sheet was slightly wetted with 1% solution of chloranil in dioxane.
Example IV One part by weight of the dry stabilized leuco crystal violet of Example III was thoroughly mixed with 0.5 part of triphenylchloromethane to give a colorless powder with which the surface of a paper sheet was coated by working some of the powder with a spatula into the pores of the paper surface. The excess powder was then removed by turning the paper upside down and a metal stencil was placed over the coated paper. Exposure of this system to a source of radiant heat (holding it over an electrically heated hot plate or under an infrarad heating bulb) produced instantaneously a permanently fixed, very strong and sharp pattern in which the shielded areas (underneath the metal) had remained white while all the directly exposed area showed a deep violet-blue coloration.
The powders mentioned in Example IV may be incorporated in a binder such as gelatin, casein, albumin, starch, and dextrin.
It is to be understood that any of the above disclosed stabilized leuco compounds may be used in combination. If a black or shade approaching black is desired, a mixture of a green with a violet or blue together with a yellow, orange, brown, or red shading color should be selected. Some mixtures of this type are disclosed and illustrated in the above-mentioned copending application.
The present invention offers many advantages over the prior art. The final color of the dye is rapidly and completely developed on the copy paper. The present invention offers a method which makes the compositions containing stabilized leuco triarylmethane dyes practical. An other advantage is that as many as 650 readable copies may be made from one master sheet.
It is apparent that many widely different embodiments of this invention may be made without departing from the spirit and scope thereof and, therefore, it is not intended to be limited except as indicated in the appended claims.
I claim:
1. In the process of converting a triarylmethane dye from a stabilized leuco to a colored form in which the triarylmethane compound is selected from the group con- 17 sistingof the spirit solubleipolyamino-triaryhnethanes of the formula:
wherein X designates a member of the group consisting. of hydrogen and methyl; wherein R is a radical of the group consisting of phenyl, tolyl, xyly1, mononitrophenyl, monoand dichloro-phenyl, aminophenyl, aminotolyl, monoacetylaminophenyl, -lp-phenylamino-naphthyl, and l-pmonoalkylaminoand diaikylamino-naphthy], and wherein the N-atoms of said aminophenyland aminotolylradicals and the N-atoms shown in the formula above in para position to the CH group have theirseeoud and third valencies satisfied bymembersof the group. consisting of hydrogen, alkyl ofless than'S carbon atoms, .2-hydroxyethyl, Z-cyanoethyl, benzyl andphcnyl, said leucocompound beingdevoid of sulfo, carboxy;.and,phenolic.hydroxvgmups. and being in a state of purity whereby it is essentially free of color, and said leuco compound being Cflfitained within the bounds of. a 'symbol impninted upon a supporting sheet and havingincorporated therewith a quatemaryammonium hydroxideiin quantity amounting to i from 0.2% to 10% by weight of said leuco compound, the improvement which comprises contacting the saidsymbol with an oxidizing developer selected from the group consisting of halogenated monocyclic quinones, the corresponding halo irnides, carboxylieacidmeroxides, triaryl chlormethanes, alkyl .nitriles, volatile liquid io'dohalides, and nitrogen oxides.
2. .The process of claimlinwhichthe developing agent is chloranil.
3. The process of claim 1 in which the developing agent is a halogenated benzoquinone compound.
4. The process of claim 1 in which the .dovelopigg agent is a halogenated toluquinone compound.
5. The process of claim 1- in which the developing'agent isan acid'peroxide.
6. The process of claim 1 in which .the developing agent is a triphenylchloromethane.
7. The process of claiml in which thetdevelopingagept is carried in an alcohol.
8. The process of claim 7- in which the developing agent contains dioxane.
"No references cited.
Claims (1)
1. IN THE PROCESS OF CONVERTING A TRIARYLMETHANE DYE FROM A STABILIZED LEUCO TO A COLORED FORM IN WHICH THE TRIARYLMETHANE COMPOUND IS SELECTED FROM THE GROUP CONSISTING OF THE SPIRIT SOLUBLE POLYAMINO-TRIARYLMETHANES OF THE FORMULA:
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US456880A US2755203A (en) | 1954-02-03 | 1954-02-03 | Process of converting a polyamino-triarylmethane dye coating on a base from a stabilized leuco form to a colored form |
DEP13479A DE1036278B (en) | 1954-02-03 | 1955-02-01 | Multiplication process in which the dye is only developed after or during the multiplication |
CH346568D CH346568A (en) | 1954-02-03 | 1955-02-02 | Colorants and process for their preparation |
GB3046/55A GB770574A (en) | 1954-02-03 | 1955-02-02 | Colouring compositions containing dyes of the triarylmethane series |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US456880A US2755203A (en) | 1954-02-03 | 1954-02-03 | Process of converting a polyamino-triarylmethane dye coating on a base from a stabilized leuco form to a colored form |
Publications (1)
Publication Number | Publication Date |
---|---|
US2755203A true US2755203A (en) | 1956-07-17 |
Family
ID=26711218
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US456880A Expired - Lifetime US2755203A (en) | 1954-02-03 | 1954-02-03 | Process of converting a polyamino-triarylmethane dye coating on a base from a stabilized leuco form to a colored form |
Country Status (4)
Country | Link |
---|---|
US (1) | US2755203A (en) |
CH (1) | CH346568A (en) |
DE (1) | DE1036278B (en) |
GB (1) | GB770574A (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2927041A (en) * | 1957-08-13 | 1960-03-01 | Davis Chester | Non-staining transfer sheet |
US2927040A (en) * | 1957-08-13 | 1960-03-01 | Davis Chester | Non-staining triarylmethane color base and method of printing therewith |
US2934007A (en) * | 1957-05-29 | 1960-04-26 | Caribonum Ltd | Duplicating machines |
US2935938A (en) * | 1956-04-17 | 1960-05-10 | Eugene Lefebure | Methods of copy reproduction |
US2949377A (en) * | 1957-10-30 | 1960-08-16 | Steinhardt Amos | Transfer composition containing a triphenylcarbinol compound and precipitated calcium carbonate |
US2978352A (en) * | 1957-07-25 | 1961-04-04 | Du Pont | Production of triarylmethane colors |
US2999026A (en) * | 1958-04-03 | 1961-09-05 | Davis Chester | Nonstaining pigments and their use |
US3021344A (en) * | 1959-08-19 | 1962-02-13 | Du Pont | Triphenylmethane dyes |
US3184483A (en) * | 1961-05-03 | 1965-05-18 | Hoechst Ag | Unsymmetrical 4-halogeno-4', 4"-diarylamino-triphenyl-methane dyestuffs and process for their manufacture |
US3185086A (en) * | 1960-05-18 | 1965-05-25 | Ritzerfeld Wilhelm | Method and arrangement for reproducing an image |
US3211757A (en) * | 1961-05-03 | 1965-10-12 | Hoechst Ag | Symmetrical 4-halogeno-4', 4"-diarylamino-triphenylmethane dyestuffs |
US3429900A (en) * | 1963-08-26 | 1969-02-25 | Allied Chem | Stable triphenyl-methane dye leucos |
US3447944A (en) * | 1965-12-06 | 1969-06-03 | Sterling Drug Inc | Thermographic copying system |
US3449379A (en) * | 1963-06-26 | 1969-06-10 | Du Pont | Triphenylmethane derivatives |
US3536517A (en) * | 1963-05-17 | 1970-10-27 | Gevaert Photo Prod Nv | Pressure recording process |
US3981735A (en) * | 1973-04-16 | 1976-09-21 | Ncr Corporation | Process for making a stable, relatively high concentration, solution of an organic color-reactive colorless dye in oil |
USRE30797E (en) * | 1977-11-09 | 1981-11-17 | Scott Paper Company | Associated dye salts and method of forming colored indicia therewith |
USRE30803E (en) * | 1977-11-09 | 1981-11-24 | Scott Paper Company | Colorless recording paper |
EP0055847A1 (en) * | 1980-12-26 | 1982-07-14 | MITSUI TOATSU CHEMICALS, Inc. | Pressure sensitive recording unit |
WO2016178668A1 (en) * | 2015-05-04 | 2016-11-10 | Milliken & Company | Leuco triphenylmethane colorants as bluing agents in laundry care compositions |
WO2018084930A1 (en) * | 2016-11-03 | 2018-05-11 | Milliken & Company | Leuco triphenylmethane colorants as bluing agents in laundry care compositions |
Families Citing this family (2)
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CH626568A5 (en) * | 1977-06-10 | 1981-11-30 | Ciba Geigy Ag | |
DE4422336A1 (en) * | 1994-06-27 | 1996-01-04 | Basf Ag | Use of leukotriarylmethanes for marking hydrocarbons |
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Publication number | Priority date | Publication date | Assignee | Title |
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US2548365A (en) * | 1948-07-13 | 1951-04-10 | Ncr Co | Process for making pressure sensitive record materials |
FR999064A (en) * | 1948-11-16 | 1952-01-25 | ||
BE500662A (en) * | 1950-01-18 |
-
1954
- 1954-02-03 US US456880A patent/US2755203A/en not_active Expired - Lifetime
-
1955
- 1955-02-01 DE DEP13479A patent/DE1036278B/en active Pending
- 1955-02-02 CH CH346568D patent/CH346568A/en unknown
- 1955-02-02 GB GB3046/55A patent/GB770574A/en not_active Expired
Non-Patent Citations (1)
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Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2935938A (en) * | 1956-04-17 | 1960-05-10 | Eugene Lefebure | Methods of copy reproduction |
US2934007A (en) * | 1957-05-29 | 1960-04-26 | Caribonum Ltd | Duplicating machines |
US2978352A (en) * | 1957-07-25 | 1961-04-04 | Du Pont | Production of triarylmethane colors |
US2927041A (en) * | 1957-08-13 | 1960-03-01 | Davis Chester | Non-staining transfer sheet |
US2927040A (en) * | 1957-08-13 | 1960-03-01 | Davis Chester | Non-staining triarylmethane color base and method of printing therewith |
US2949377A (en) * | 1957-10-30 | 1960-08-16 | Steinhardt Amos | Transfer composition containing a triphenylcarbinol compound and precipitated calcium carbonate |
US2999026A (en) * | 1958-04-03 | 1961-09-05 | Davis Chester | Nonstaining pigments and their use |
US3021344A (en) * | 1959-08-19 | 1962-02-13 | Du Pont | Triphenylmethane dyes |
US3185086A (en) * | 1960-05-18 | 1965-05-25 | Ritzerfeld Wilhelm | Method and arrangement for reproducing an image |
US3184483A (en) * | 1961-05-03 | 1965-05-18 | Hoechst Ag | Unsymmetrical 4-halogeno-4', 4"-diarylamino-triphenyl-methane dyestuffs and process for their manufacture |
US3211757A (en) * | 1961-05-03 | 1965-10-12 | Hoechst Ag | Symmetrical 4-halogeno-4', 4"-diarylamino-triphenylmethane dyestuffs |
US3536517A (en) * | 1963-05-17 | 1970-10-27 | Gevaert Photo Prod Nv | Pressure recording process |
US3449379A (en) * | 1963-06-26 | 1969-06-10 | Du Pont | Triphenylmethane derivatives |
US3429900A (en) * | 1963-08-26 | 1969-02-25 | Allied Chem | Stable triphenyl-methane dye leucos |
US3447944A (en) * | 1965-12-06 | 1969-06-03 | Sterling Drug Inc | Thermographic copying system |
US3981735A (en) * | 1973-04-16 | 1976-09-21 | Ncr Corporation | Process for making a stable, relatively high concentration, solution of an organic color-reactive colorless dye in oil |
USRE30797E (en) * | 1977-11-09 | 1981-11-17 | Scott Paper Company | Associated dye salts and method of forming colored indicia therewith |
USRE30803E (en) * | 1977-11-09 | 1981-11-24 | Scott Paper Company | Colorless recording paper |
EP0055847A1 (en) * | 1980-12-26 | 1982-07-14 | MITSUI TOATSU CHEMICALS, Inc. | Pressure sensitive recording unit |
WO2016178668A1 (en) * | 2015-05-04 | 2016-11-10 | Milliken & Company | Leuco triphenylmethane colorants as bluing agents in laundry care compositions |
US9982221B2 (en) | 2015-05-04 | 2018-05-29 | Milliken & Company | Leuco triphenylmethane colorants as bluing agents in laundry care compositions |
US10723982B2 (en) | 2015-05-04 | 2020-07-28 | Milliken & Company | Leuco triphenylmethane colorants as bluing agents in laundry care compositions |
US11053460B2 (en) | 2015-05-04 | 2021-07-06 | Milliken & Company | Leuco triphenylmethane colorants as bluing agents in laundry care compositions |
US11053461B2 (en) | 2015-05-04 | 2021-07-06 | Milliken & Company | Leuco triphenylmethane colorants as bluing agents in laundry care compositions |
WO2018084930A1 (en) * | 2016-11-03 | 2018-05-11 | Milliken & Company | Leuco triphenylmethane colorants as bluing agents in laundry care compositions |
Also Published As
Publication number | Publication date |
---|---|
CH346568A (en) | 1960-05-31 |
DE1036278B (en) | 1958-08-14 |
GB770574A (en) | 1957-03-20 |
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