New pigment preparations based on perylene compounds

C - Chemistry – Metallurgy – 09 – B

Patent

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Details

C09B 67/22 (2006.01) C08K 13/06 (2006.01) C09B 5/62 (2006.01) C09B 67/20 (2006.01) C09D 201/00 (2006.01)

Patent

CA 2064725

Pigment preparations consisting essentially of (a) at least one pigment based on perylene-3,4,9,10-tetracarboxylic dianhydride or on corresponding monoimides or diimides of tetracarboxylic acid monoanhydride, or a halogenation product thereof, (b) at least one pigment dispergent based on perylene-3,4,9,10-monoimide substituted on one or both imide nitrogen atoms by alkylene or arylene sulphonic or carboxylic acid groups or on corresponding diimides of tetracarboxylic acid monoanhydride, or a halogenation product thereof. The dispergents used appreciably enhance the key properties of perylene pigments, such as dispersibility, colouring power, stability to flocculation, transparency, rheological behaviour and surface properties of the application medium. These new preparations are suitable for the pigmentation of high-quality lacquers and synthetic resins.

Préparations pigmentaires, composées essentiellement de (a) au moins un pigment à base de pérylène-3,4,9,10-dianhydride d'acide tétracarboxylique ou bien de monoimides ou de diimides de monoanhydride d'acide tétracarboxylique correspondants, ou un produit d'halogénation de ceux-ci, et (b) au moins un dispersant pigmentaire à base de pérylène-3,4,9,10-monoimide de monoanhydride d'acide tétracarboxylique ou de diimides d'acide tétracarboxylique correspondants susbstitués sur un ou deux atomes d'azote d'imide par des groupes d'acide sulfonique ou d'acide carboxylique d'alkylène ou d'arylène, ou bien un produit d'halogénation de ceux-ci. Les dispersants utilisés améliorent notablement les caractéristiques les plus importantes des pigments de pérylène comme la dispersabilité, le pouvoir colorant, la stabilité à la floculation, la transparence, le comportement rhéologique ainsi que les propriétés de surface du milieu d'application. Ces nouvelles préparations conviennent pour la pigmentation de laques et de résines synthétiques de haute qualité.

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