Patent ID: 8883889

Claim:
A pigment composition comprising: a) a 1,4-diketopyrrolo[3,4-c]pyrrole of the formula (I) wherein R 1 and R 2 independently of each other are R 31 , R 32 , and R 33 independently of one another are hydrogen, carbamoyl, C 2-18 -alkylcarbamoyl, C 2-18 -alkoxycarborlyl, C 2-18 -alkanoylamino, halogen, C 1 -C 24 alkyl, C 1 -C 6 alkoxy, C 1 -C 18 alkylthio, C 1 -C 18 alkylamino, di(C 1 -C 18 alkyl)amino, —CN, —NO 2 , phenyl, trifluoromethyl, C 5 -C 6 cycloalkyl, —C═N—(C 1 -C 24 alkyl), imidazolyl, pyrazolyl, triazolyl, piperazinyl, pyrrolyl, oxazolyl, benzoxazolyl, benzothiazolyl, benzimidazolyl, morpholinyl, piperidinyl, or pyrrolidinyl, T 2 is —C(O)—NH—, —C(O)—O—, —NH—C(O)—, —CH 2 —, —CH(CH 3 )—, —C(CH 3 ) 2 —, —CH═N—, —N═N—, —O—, —S—, —SO—, —SO 2 —, or —NR 38 —, R 34 and R 35 independently of one another are hydrogen, halogen, C 1-6 -alkyl, C 1-6 -alkoxy, or —CN, R 36 and R 37 independently of one another are hydrogen, halogen, or C 1-6 -alkyl, and R 38 is hydrogen or C 1 -C 6 -alkyl; and b) from 0.5 to 4 weight % based on the weight of the 1,4-diketopyrrolo[3,4-c]pyrrole of formula (I) of a compound of formula (V) wherein X is O, S, or NR 14 , wherein R 14 is linear or branched C 1-10 -alkyl, C 7-10 -aralkyl, or C 6-10 -aryl; R 12 and R 13 are independently of each other hydrogen, linear or branched C 1-10 -alkyl, linear or branched C 1-10 -alkoxy, linear or branched C 1-10 -thioalkyl, C 5-10 -cycloalkyl, C 6-10 -aryloxy, C 6-10 -arylthio, C 7-10 -aralkyloxy, C 7-10 -aralkylthio, halogen, CONR 5 R 6 , C(O)OR 7 , or SO 2 R 9 ; R 5 and R 6 are hydrogen, linear or branched C 1-10 -alkyl, C 5-10 -cycloalkyl, or C 6-10 -aryl, R 7 is hydrogen, linear or branched C 1-10 -alkyl, C 5-10 -cycloalkyl, C 7-10 -aralkyl, or C 6-10 -aryl, and R 9 is hydrogen, linear or branched C 1-10 -alkyl, C 5-10 -cycloalkyl, C 7-10 -aralkyl, C 6-10 -aryl, or NR 10 R 11 , wherein R 10 and R 11 are hydrogen, linear or branched C 1-10 -alkyl, C 7-10 -aralkyl, or C 6-10 -aryl.