Aqueous pigment paste for offset ink, process for producing the paste, and use thereof
US5882394A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1997 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Aug 27, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/037
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a aqueous pigment paste for an offset ink, which paste is suitable for producing an offset ink by a flushing method, a process for the production of the aqueous pigment paste, and an offset ink obtained by a flushing method. The aqueous pigment paste for an offset ink contains a lake pigment of an azo dye obtained by coupling a diazonium salt of an aromatic amine having a soluble group and a coupler component, 3 to 15% by weight, based on the azo dye, of a rosin, 1 to 20% by weight, based on the azo dye, of a vehicle for an offset ink, the total amount of the lake pigment, the rosin and the vehicle being 10 to 40% by weight, and 60 to 90% by weight of water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.