发明授权
US4734137A Process for preparation of organic pigments 失效
有机颜料的制备方法

Process for preparation of organic pigments
摘要:
Organic pigments are prepared by dissolving at least one organic pigment in a non-protonic polar solvent in the presence of a caustic alkali and water, and adding to the solution an acid having an acrylic resin dissolved therein to effect neutralization and reprecipitation.
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