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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

Active Publication Date: 2009-09-09
CIBA SPECIALTY CHEM HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, especially the fastness properties are still not fully satisfactory

Method used

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  • Heat-stable encapsulated pigments
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Example 1 : the formula of 28.5g A 35.2% wet press cake of the pigment was dispersed in 200 ml of water. 40g of S760 (50±1% solids, BASF) was added and the suspension was stirred for 2 hours. The polymer was then precipitated by adding HCl, the solid was filtered and incubated at 60°C / 10 4 Dry at Pa.

Embodiment 2

[0078] Example 2 : the formula of 18.2g A 55% wet press cake of pigment is dispersed to contain 20g LR 8977 (50±1% solids, BASF) in 250 ml of water. The polymer was then precipitated by adding HCl, the solid was filtered and incubated at 60°C / 10 4 Dry at Pa.

Embodiment 3

[0079] Example 3 : the formula of 23.7g A 42.2% wet press cake dispersed to contain 23.8g C44 (-40% solids, CIBA Specialty Chemicals Inc.) in 250 ml of water. The polymer was then precipitated with HCl and the yellow suspension was heated at 100°C for 18 hours. Filtered and heated at 50°C / 10 4 Drying at Pa yielded 20 g of yellow granules.

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/08
CPCC09B67/001C08K9/10C08J3/226C09B17/00C09B67/0004
Inventor G·鲁茨戈梅茨T·鲁克C·普赖斯
Owner CIBA SPECIALTY CHEM HLDG INC
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