Compositions and methods comprising pigments and polyprotic dispersing agents
US7261770B2 · kind B2 · utility
2Cited by
17References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2004 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | Sep 3, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/64
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In various embodiments, a pigment composition is provided comprising a base particle and a dispersing agent, the dispersing agent comprising a salt and/or ester of: (i) an amine, alcohol, and/or alkanol amine and (ii) a polyprotic acid, wherein the mole ratio of the amine, alcohol, and/or alkanol amine to the polyprotic acid is greater than 3:1. In various embodiments, the pigments have improved stability, hiding power, tint strength, and/or gloss.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.