Stabilization of organic pigments
US5348580A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 1993 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Aug 25, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0063
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Pigment compositions comprising PA0 a) at least one organic pigment selected from the group consisting of diketopyrrolopyrroles, azo pigments quinacridones, quinophthalones, phthalocyanines, indanthrones, flavanthrones, pyranthrones, anthraquinones, perylenes, dioxazines, perinones, thioindigo, isoindolines isoindolinones and metal complexes and PA0 b) 0.01 to 100% by weight, based on the pigment, of a condensation or addition polymer, the recurring molecular unit of which contains at least one radical containing a nitroxyl or hydroxylamino group or is substituted by a side group containing a nitroxyl or hydroxylamino group, and copolymers thereof with one another or with nitroxyl- or hydroxylamine-free components. These pigment compositions are distinguished by outstanding resistance to light and weathering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.