Organic pigments coated with metal phosphate complexes and amines
US5641350A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1995 |
| Grant date | Jun 24, 1997 |
| Priority date | — |
| Expiry date | Dec 8, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0004
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Pigment compositions comprising an organic pigment whose particle surface is provided with a protective coating layer, which coating comprises PA1 (a) a metal phosphate complex in which the metal is selected from the group consisting of, zirconium, titanium and mixtures thereof in a quantity of from 0.5 to 100% by weight, preferably to 20% by weight, particularly preferably from 1 to 10% by weight, based on the pigment; and PA1 (b) an amine or ammonium salt, in a quantity of from 0.5 to 15% by weight, preferably up to 10% by weight, particularly preferably up to 5% by weight, based on the pigment. The compositions are distinguished by outstanding properties, especially by the high gloss of the colorations obtained therewith, by very good dispersibility, high dispersion stability and heat resistance and by very good rheological characteristics of the paint millbases or printing inks prepared therewith. The plastics pigmented with the compositions of the invention are likewise distinguished by good dispersibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.