| 摘要 |
Quinoxalin-monoazo-acetarylide pigment Compounds of the formula (I) (see fig I) in which R1 and R2 are identical or different and are Cl, COO(C,-C4)-alkyl, CONH2, CONCH3, CON(CH3)2 or SO2NRR', where R and R' are identical or different and are hydrogen, C1-C4-alkyl or phenyl, it being possible for phenyl to be substituted by methyl, ethyl, methoxy, ethoxy or halogen, R3 is hydrogen, methyl, methoxy, ethoxy, chloro or bromo, and R4 is hydrogen, C1-C3-alkyl, chloro or bromo, are useful yellow pigments with high light fastness and weather fastness propert ies.
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