Surface-modified pigment compositions
US8753550B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2010 |
| Grant date | Jun 17, 2014 |
| Priority date | — |
| Expiry date | Nov 15, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K9/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Pigment compositions containing organic pigments with an outstanding migration-free property and an excellent rheology at high concentration, and derivatives thereof containing heterocyclic substituents. The pigment compositions contains (a) carbon black or an organic pigment containing a chromophore Q1 of the following formula,wherein Z1 and Z2 are O or N—, C· is a carbon atom with an electron in a p orbital, and n is an integer from 1 to 4; and (b) a compound containing a chromophore of the following formula (II),wherein Q2 is an m-valent residue of carbon black or of the chromophore Q1; G1 is preferablyand R1, R2, R3, R4, R5, R6, and R8 are preferably all H; m is an integer from 1 to 4. The pigment compositions can be used as rheology modifiers, preferably for pigmented coating compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.