| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a thermoplastic resin composition for laser welding improving appearance trouble such as occurrence of flashes and voids caused when synthetic resin parts are joined by the laser welding and to provide the synthetic resin parts using the thermoplastic resin composition for the laser welding. <P>SOLUTION: The thermoplastic resin composition for the laser welding comprises a graft copolymer (A) and an infrared absorber exhibiting absorbency at 750-850 nm wavelength. The graft copolymer (A) is obtained by further carrying out graft polymerization of at least one kind of monomer (a2) selected from the group consisting of an aromatic vinyl monomer, a vinyl cyanide monomer, an acrylic or a methacrylic ester monomer and other vinyl monomers with a cross-linked acrylic rubber (a1) prepared by polymerizing a mixture (a1-2) of an acrylic ester with a monomer having ≥2 (meth)acryloyl groups or vinyl groups in the molecule and a monomer having an allyl group in the molecule in the presence of cross-linked polymer particles (a1-1). <P>COPYRIGHT: (C)2006,JPO&NCIPI |
