发明授权
US3956266A Bis-(benzimidazolone-azo-acetoacetylamino)-phenylene pigments 失效
双 - (苯并咪唑酮 - 偶氮 - 乙酰乙酰氨基) - 亚苯基颜料

Bis-(benzimidazolone-azo-acetoacetylamino)-phenylene pigments
摘要:
New diazo pigments of the formula ##EQU1## wherein A denotes a phenylene or naphthylene radical and R denotes an aromatic radical containing a --CONH-- group bonded in a cyclic structure are prepared. The pigments are useful for coloring high-molecular organic materials such as polyamides, polyurethanes or polyesters. The pigments have good fastness to light, migration and weathering.
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