Process for preparing color dispersions and the color dispersions made thereof
US10023757B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 4, 2014 |
| Grant date | Jul 17, 2018 |
| Priority date | — |
| Expiry date | Jan 19, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D105/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for preparing color dispersions comprising a first step of contacting water, a first colorant, and a gel composition comprising a first gel selected from methylcellulose, hydropropylmethylcellulose, hydroxyethylmethylcellulose, hydroxybutylmethylcellulose, hydroxyethylethylcellulose, and the mixture thereof, and a second gel selected from guar, pectin, carrageenan, gelatin, and the mixture thereof, to form a first colorant dispersion; a second step of contacting the first colorant dispersion with a composition comprising an aqueous dispersion of polymer particles, clay, and a peptizing agent to form a dispersion of protected first colorant particles. A color dispersion comprising the first colorant dispersion and a color coating comprising the color dispersion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.