Patent ID: 6402828
Filing Date: 2002-06-11
Classification: C09B

Abstract:
A pigment composition which comprisesa) at least one pigment of the formula: wherein X represents hydrogen or a cation from a metal selected from the group consisting of calcium, barium, strontium, magnesium, manganese and aluminum, R1, R2 and R3 represent hydrogen or members selected from the group consisting of C1-C4-alkyl, phenyl, â€”NO2 and â€”CF3, and R4 is as defined as R1, R2 and R3 or represents a group of the formula wherein Xâ€² is as defined as X above and R1â€², R2â€² and R3â€² are as defined as R1, R2 and R3 under the formula (I) above, and b) an effective shading amount of at least one auxochrome of the formula wherein Xâ€³ is as defined as X under the formula (I) above, at least one of R5, R6, R7, R8 and R9 represents C1-C4-alkoxy and R5, R6, R7, R8 and R9 independently of one another additionally represent members selected from the group consisting of hydrogen, C1-C4-alkyl, phenyl, halogen, â€”SO3â€”H, â€”NO2 and â€”CF3 and R7 additionally represents a group of the formula wherein Xâ€²â€³ is as defined as X under the formula (I) above, R5â€², R6â€², R8â€² and R9â€² are as defined as R5, R6, R7 and R8 under the formula (II) above, with the proviso, that (a) if only one of R5, R6, R7, R8 and R9 stands for C1-C4-alkoxy and (b) if one additional member of R5, R6, R7, R8 and R9 (less the one which stands for C1-C4-alkoxy) stands for â€”COOH or â€”SO3H, then no other member of R5, R6, R7, R8 and R9 (less the ones which stand for C1-C4-alkoxy and â€”COOH respectively â€”SO3H) stands for methyl or hydrogen.