Pigment dispersants and pigment compositions containing the same
US6471766B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2001 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Jan 28, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0038
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Pigment dispersants comprise compounds represented by the following formula (I) or (II) or metal, ammonium or amine salts thereof: wherein X1 is a hydrogen or halogen atom or an alkyl or acylamino group, Y1 is an anthraquinonylamino, phenylamino, naphthyl-amino or phenoxy group, each of R1 and R3 is a hydrogen atom or a substituted or unsubstituted alkyl or phenyl group, R2 is a substituted or unsubstituted alkylene, phenylene or naphthylene group, X2 is a hydrogen or halogen atom or a substituted or unsubstituted alkyl group, R4 is a substituted or unsubstituted phenyl or naphthyl group, and n means an average number of sulfonic acid groups introduced in said compound and stands for a number of from 0.5 to 2. Pigment compositions, such as colorants for gravure inks, paints or color filters, comprise pigments and the pigment dispersants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.