Stabilization
US5346545A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1993 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | Mar 5, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D7/41
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Pigment compositions comprising PA0 a) at least one organic pigment chosen from the group comprising azo pigments, quinacridones, phthalocyanines, indanthrones, flavanthrones, pyranthrones, anthraquinones, perylenes, dioxazines, perinones, thioindigo, isoindolines, isoindolinones and metal complexes and PA0 b) 1 to 100% by weight, based on the pigment, of a nitroxyl compound consisting of at least one unsubstituted or substituted 5-, 6- or 7-membered heterocyclic ring containing a divalent group of the formula ##STR1## in which R.sub.1 and R.sub.2 independently of one another are methyl, ethyl or phenyl, or together form a 4- to 12-membered aliphatic ring, PA0 L is an aromatic radical PA0 and Y is O., or of an acid addition salt thereof. These pigment compositions are distinguished by an outstanding resistance to light and weathering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.