Washable ink compositions
US5043013A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1989 |
| Grant date | Aug 27, 1991 |
| Priority date | — |
| Expiry date | Aug 15, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B69/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A washable aqueous ink composition having a viscosity of from about 1.0 to about 6.0 centipoises and containing from about 10 to about 50% by weight of one or more polymeric colorants of the formula: ##STR1## wherein: X is a polar group such as sulfonic acids, sulfonic acid salts, sulfonamides, sulfonates or the like; PA1 R is alkylene; Y is H, alkanoyl, carbamoyl, or the like; PA1 R.sub.1 is nitrogen, oxygen, sulfur, or a sulfur-containing divalent linking group; PA1 a is an integer of from six to about forty; PA1 b and c are each independently selected from one or two; PA1 d is an integer of from one to four; the product of (a) (b) (c) is an integer of from 6 to about 40; PA1 and CHROM is a chromophore such as nitro, nitroso, monoaxo, disazo and trisazo, diarylmethane, triarylmethane, xanthane, acridine, methine, thiazole, indamine, azine, oxazine, or anthraquinone, wherein the (RO).sub.a moiety is bonded to a carbocyclic aromatic ring of the (CHROM) through R.sub.1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.