发明授权
US4648907A High color strength diarylide yellow pigment compositions 失效
高色强度二芳基黄颜料组合物

High color strength diarylide yellow pigment compositions
摘要:
Improved diarylide yellow pigment compositions having high color strength. The compositions are manufactured by modifying tetrazotized 3,3'-dichlorobenzidine with a solution of about 3 to about 5 mole percent of a first acetoacetarylide, followed by coupling into a second acetoacetarylide such as acetoacetanilide.
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