| abstract |
Disclosed is a laser beam having high transparency in the wavelength region of the laser beam, the color tone of the resin member does not fade in the heat treatment step before laser welding of the colored thermoplastic synthetic resin member, and the dye sublimation. Provided is a laser beam transmitting colored thermoplastic resin composition having a high laser beam transmissivity that can be laser-welded in a state in which no substantially occurs. [Solution] A laser light transmitting colored thermoplastic resin composition comprising an anthrapyridone-based acidic dye represented by the following formula (1). ... (1) [In Formula (1), R 1 represents hydrogen or a benzoyl group, R 2 represents hydrogen, an alkyl group, an aryl group, an alkoxy group or the like, R 3 represents hydrogen, an alkyl group, an aryl group, a group represented by the formula (2), etc. In (2) [formula (2), X represents O or NH, R 6 and R 7 are hydrogen, an alkyl group, an aryl group, M represents hydrogen or an alkali metal. ] R 4 represents hydrogen, an alkyl group, an alkoxy group, or a hydroxyl group, R 5 represents hydrogen, an alkyl group, an alkoxy group, or a hydroxyl group, M represents hydrogen or an alkali metal. ] [Selection figure] None |