| abstract |
The thermoplastic resin composition of the present invention contains (a) a resin composition consisting of (1) at least one polypropylene resin (E) selected from the group consisting of (i) a graft polypropylene (A) obtained by graft polymerizing an unsaturated carboxylic acid or a derivative thereof onto a polypropylene (C), (ii) a graft polypropylene (B) obtained by graft polymerizing an unsaturated carboxylic acid or a derivative thereof and an unsaturated aromatic monomer onto a polypropylene (C), (iii) a composition (D) selected from the group consisting of a composition of a polypropylene (C) and the graft polypropylene (A), a composition of a polypropylene (C) and the graft polypropylene (B), a composition of a polypropylene (C), the graft polypropylene (A) and the graft polypropylene (B), and (2) a saturated polyester resin (F) (b) an epoxy group-containing copolymer (G), and (c) at least one member selected from the group consisting of (i) a rubbery substance (H), (ii) a modified rubbery substance (I), and (iii) a mixture of the rubbery substance (H) and the modified rubbery substance (I), the content of the saturated polyester resin (F) in the thermoplastic resin composition being not more than 50% by weight; or (a) either a graft resin composition (J) obtained by graft polymerizing an unsaturated carboxylic acid or a derivative thereof onto a mixture of a polypropylene (C) and a rubbery substance (H), or a graft resin composition (K) obtained by graft polymerizing an unsaturated carboxylic acid or a derivative thereof and an unsaturated aromatic monomer onto a mixture of a polypropylene (C) and a rubbery substance (H), (b) a saturated polyester resin (F), (c) an epoxy group-containing copolymer (G), and (d) a polypropylene (C); which thermoplastic resin composition is suitably used in the fields where high level of heat resistance, impact resistance, and especially low-temperature impact resistance are required. |