| abstract |
(57) [Summary] [Configuration] Formula I [Chemical Formula 1] [For example, one of R 1 and R 2 is H, chlorine, methyl, phenyl, cyano group, the other is H; one of R 3 and R 4 is H, the other is -OTA; T is p-phenylene group, direct bond; A is a group Represents ], And a) other diketopyrrolopyrroles having the same structure as the formula I (the portions corresponding to R 1 , R 2 , R 3 and R 4 are H, chlorine, C1- 4 alkyl, A pigment composition comprising at least one of (methoxy, phenyl, cyano groups) and b) 0.1-20% by weight of diketopyrrolopyrrole of the formula I based on a). [Effects] High molecular weight organic materials colored with the above compounds or compositions, especially automotive lacquers, have excellent light resistance and weather fastness. |