Abstract: A method for producing a composition including polylactic acid and having excellent heat stability, especially moist heat stability, and a molded article thereof. The composition includes 100 parts by weight of a resin component (component A) which is composed of 5 to 100 wt % of polylactic acid (component A-?) and 95 to 0 wt % of a thermoplastic resin (component A-?), 0.001 to 5 parts by weight of a phosphono-fatty acid ester (component B), 0.01 to 5 parts by weight of a phosphate metal salt (component C), 0.001 to 2 parts by weight of at least one antioxidant (component D) selected from the group consisting of a phosphite-based compound, a phosphonite-based compound, a hindered phenol-based compound and a thioether-based compound, and 0.001 to 10 parts by weight of an end-sealing agent (component E).

Abstract: A composition comprising polylactic acid and having excellent heat stability, especially moist heat stability, and a molded article thereof. The composition comprises 100 parts by weight of a resin component (component A) which is composed of 5 to 100 wt % of polylactic acid (component A-?) and 95 to 0 wt % of a thermoplastic resin (component A-?), 0.001 to 5 parts by weight of a phosphono-fatty acid ester (component B), 0.01 to 5 parts by weight of a phosphate metal salt (component C), 0.001 to 2 parts by weight of at least one antioxidant (component D) selected from the group consisting of a phosphite-based compound, a phosphonite-based compound, a hindered phenol-based compound and a thioether-based compound, and 0.001 to 10 parts by weight of an end-sealing agent (component E).

Abstract: A polyester resin composite molded article composed of a resin composition (A) comprising a polybutylene terephthalate (A1), an inorganic filler (A2) and a modified ethylenic copolymer (A3) produced by the graft-polymerization of an &agr;, &bgr;-unsaturated carboxylic acid or its acid derivative and a metal (B) wherein a part or total of the metal (B) is covered with the resin composition (A), the graft copolymer (A3) is present in the form of dispersed particles in the molded part of the resin composition constituting the composite molded article, and the diameters of the dispersed particles are between 1 and 3 &mgr;m. The present invention provides a polyester resin composite molded article having excellent thermal shock resistance and exhibiting retention stability in a molding cycle in insert molding, etc.

Abstract: A polyester resin composite molded article composed of a resin composition (A) comprising a polybutylene terephthalate (A1), an inorganic filler (A2) and a modified ethylenic copolymer (A3) produced by the graft-polymerization of an &agr;, &bgr;-unsaturated carboxylic acid or its acid derivative and a metal (B) wherein a part or total of the metal (B) is covered with the resin composition (A), the graft copolymer (A3) is present in the form of dispersed particles in the molded part of the resin composition constituting the composite molded article, and the diameters of the dispersed particles are between 1 and 3 &mgr;m. The present invention provides a polyester resin composite molded article having excellent thermal shock resistance and exhibiting retention stability in a molding cycle in insert molding, etc.