Stabilisation of organic pigments

Details Stabilisation of organic pigments Stabilisation of organic pigments

C - Chemistry, Metallurgy

09

B

C09B 67/00 (2006.01) B01J 13/02 (2006.01) C08K 5/00 (2006.01) C08K 5/34 (2006.01) C09B 31/02 (2006.01) C09B 47/04 (2006.01) C09B 57/04 (2006.01) C09B 67/20 (2006.01) C09D 7/00 (2006.01)

Patent

CA 2090926

TH/P-19012/A Stabilisation of organic pigments Abstract Pigment compositions comprising 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 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 Image (I) or Image (II), in which R1 and R2 independently of one another are methyl, ethyl or phenyl, or together form a 4- to 12-membered aliphatic ring, L is an aromatic radical and Y is O?, or of an acid addition salt thereof. These pigment compositions are distinguished by an outstanding resistance to light and weathering.

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