Process for the preparation of pigment compositions
US6361595B1 · kind B1 · utility
1Cited by
9References
5Claims
0Family size
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Key dates
| Filing date | Apr 10, 2000 |
| Grant date | Mar 26, 2002 |
| Priority date | — |
| Expiry date | Apr 10, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D17/003
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Preparation of stabilized pigment compositions, comprising mixing a water-miscible quaternary ammonium compound of formula III wherein R1, R2, R3 and R4 independently of each other stand for C1-C22aklyl, C2-C22alkenyl, benzyl, pyridyl, quinolyl, isoquinolyl or polyoxyalkylenyl, and X− is an anion, a water-immiscible organic solvent and a pigment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.