| 摘要 |
This invention relates to a resinated 2,9-dimethylquinacridone pigment, which is prepared by a process comprising (a) preparing an aqueous suspension containing a 2,9-dimethylquinacridone pigment, a mixture of water-soluble acid salts and a particle growth inhibitor, wherein the mixture of water-soluble acid salts consists essentially of from about 50 to about 95 parts by weight of a water-soluble resin acid salt, and from about 5 to about 50 parts by weight of a water-soluble salt of a napthenic acid or a dimeric acid, or a mixture thereof, (b) precipitating the mixture of acid salts from the suspension in the form of insoluble salts and (c) isolating the resinated 2,9-dimethylquinacfidone pigment from the suspension. The resinated 2,9-dimethylquinacridone pigment possesses excellent dispersability, color strength, saturation and heat stability. It is especially useful for coloring plastics, coatings and inks.
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