Heat-stable encapsulated pigments

A technology of organic pigments and pigment compositions, which is applied in the direction of azine dyes, organic dyes, chemical instruments and methods, etc., and can solve problems such as unsatisfactory fastness properties
CN101528861AActive Publication Date: 2009-09-09CIBA SPECIALTY CHEM HLDG INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CIBA SPECIALTY CHEM HLDG INC
Publication Date
2009-09-09

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Abstract

Engineering plastics, especially polyamide, are coloured with improved fastness and stability properties using pigment compositions comprising an organic pigment wholly overlaid with a crosslinked (meth)acrylic resin or copolymer thereof. Preference is given to the use of diketopyrrolopyrrole, azo, pteridine, isoindoline and isoindolinone pigments. The invention also relates to processes for the preparation of the pigment compositions.
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Description

Contents of the invention

[0001] The present invention relates to novel pigment compositions and methods for their preparation and for the production of colored engineering plastics (thermoplastics which maintain dimensional stability and most of their mechanical properties above 100°C or below 0°C), especially polyamide-based colored The use of engineering plastics. Background technique

[0002] The bulk coloring of polymers processed at high temperatures, such as engineering plastics and especially polyamides, is usually carried out using so-called solvent dyes, which are soluble in the polyamide bulk at high processing temperatures and in addition to having the requisite high heat resistance In addition to its high chemical stability, it also has sufficient chemical stability, for example, for highly reducing media of polyamide melts. However, soluble dyes generally have significantly lower lightfastness compared to pigments.

[0003] Pigments for these polymers are alm...

Claims

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