Study on the Preparation of Organic Pigment Yellow by Modification of Attapulgite Soil
Based on four major processes such as pretreatment of attapulgite soil,preparation of diazonium salts,coupling,and post-treatment,modified attapulgite soil was used to prepare organic pigment yellow.Organic pigments are adsorbed inside the attapulgite soil which forms a protective layer outside,so that the light fastness and weather resistance of the organic pigment are greatly improved.At the same time,the production process(especially the selection and control of reaction temperature)is optimized to produce high light fastness C.I.Pigment Yellow 12,C.I.Pigment Yellow 14,and C.I.Pigment Yellow 65.They can be widely used in fields such as exterior wall decorative coatings,plastic coloring,and high-end inks.
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