PURPOSE: To obtain a molding remarkably reduced in discoloration and fading due to high temperatures as compared with the case of using an unsubstituted copper phthalocyanine.
CONSTITUTION: This method for producing a colored thermoplastic resin molding is to react phthalic anhydride and/or phthalimide (b1) with trimellitic anhydride and/or pyromellitic anhydride (b2), urea and/or ammonia (b3) and copper and/or its compound (b4) at a molar ratio of (b1/b2) of the components (b1) to (b2) within the range of (99.5/0.5) to (94.0/6.0), then blend a copper phthalocyanine pigment mixture (B) converted into a pigment therewith and subsequently melt mold the resultant mixture in reacting a thermoplastic resin (A) with the components (b1), (b2), (b3) and (b4) in the presence of a catalyst in an organic solvent, subsequently convert the prepared reactional product into the pigment and produce the pigment mixture, in producing the objective colored thermoplastic resin molding.
SAKAI HIDEHIKO
HIRAYAMA TADASHI
