Pigment dispersion and offset printing ink composition using the same
US5847028A · kind A · utility
6Cited by
10References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1996 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Dec 19, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K23/52
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A pigment dispersion is disclosed which comprises a pigment, a pigment dispersant, and optionally a binder resin, wherein the pigment dispersion comprises as the pigment dispersion at least 0.2 parts by weight of a modified novolak resin (A) and/or a graft copolymer (B) relative to 100 parts by weight of the pigment, the modified novolak resin (A) and the graft copolymer (B) each having an aromatic ring and a ring structure given by ring opening of an epoxy group by a carboxyl group of a hydroxycarboxylic acid or a derivative thereof. An ink composition for offset printing containing the pigment dispersion is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.