PURPOSE: To improve non-crystallizability and non-cohesiveness of pigment in a non-aqueous medium, by blending quinacridone pigment with a reaction product between halogenomethylquinacridone and an aliph. amine having at least two amino gp.
CONSTITUTION: (a) Halogenomethylquinacridone having 1W4 halogenomethyl gp. per molecule of quinacridone is reacted with (b) an aliph. amine having at least two amino gp., such as diamine or triamine of the formula (wherein R 1 , R 2 , R 3 are H, substd. or unsubstituted 1W6C alkyl; n is 2W6) in an amount of not less than 1mol of said amine per mole of halogenomethyl gp. in an inert org. solvent, such as benzene or toluene, at a temp. of 50W250°C for 5W20hr. 1W30pts.wt. of the reaction product is blended with 100pts.wt. of quinacridone pigment to obtain the desired pigment compsn.