Warp-free pigment compositions comprising phthalocyanine...

Details Warp-free pigment compositions comprising phthalocyanine... Warp-free pigment compositions comprising phthalocyanine...

C - Chemistry, Metallurgy

09

B

C09B 67/00 (2006.01) C09B 67/22 (2006.01) C09B 69/10 (2006.01)

Patent

CA 2483643

The invention provides a composition comprising particles of an optionally halogenated phthalocynine (a); from 0.5 to 10% weight, preferably from 2 to 8% by weight, based on the optionally halogenated phthalocyanine (a), or a vinylic or acrylic polymer (b); and from 1 to 15% by weight, preferably from 3 to 10% by weight, based on the optionally halogenated phthalocyanine (a), of an optionally halogenated phthalocyanine (c) which is outside the particles of the optionally halogenated phthalocyanine (a) and is substituted by a group comprising at least 1 hetero atom selected from the group consisting of N, O, S and P and at least 3 carbon atoms. The instant compositions comprising three essential components are surprisingly warpfree in substrate such as partially crystalline plastics, especially those processed by injection moulding. Geometrically identical parts of different colours are obtained.

L'invention concerne une composition comprenant : des particules d'une phtalocyanine éventuellement halogénée (a) ; de 0,5 à 10 % en poids, de préférence de 2 à 8 % en poids, par rapport à la phtalocyanine éventuellement halogénée (a), d'un polymère vinylique ou acrylique (b) ; et de 1 à 15 % en poids, de préférence de 3 à 10 % en poids, par rapport à la phtalocyanine éventuellement halogénée (a), d'une phtalocyanine éventuellement halogénée (c) qui est à l'extérieur des particules de la phtalocyanine éventuellement halogénée (a), et qui est substituée par un groupe comprenant N, O, S et P et au moins trois atomes de carbone. Les compositions selon l'invention comprenant trois composants essentiels se sont révélées, de façon surprenante, exemptes de déformations dans des substrats tels que des matières plastiques partiellement cristallines, notamment celles traitées par moulage par injection. Des pièces géométriquement identiques de différentes couleurs sont obtenues.

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