Toyobo Co., Ltd.

Toyobo Mc Corporation

Motonobu Kamiya

Yasuto Fujii

Takahiro Shimizu

Kaori Furukawa

Takuya Shimoharai

Satoru Horiguchi

The present invention relates to a polybutylene terephthalate resin composition comprising 70 to 97 parts by mass of a polybutylene terephthalate resin (A) having an intrinsic viscosity (IV) of 0.60 to 0.95 dl/g. 2 to 15 parts by mass of a modified olefin resin (B), and 1 to 15 parts by mass of a polyester elastomer (C), based on 100 parts by mass of components (A), (B) and (C) in total, and preferably further comprising 0.05 to 1.5 parts by mass of a carbodiimide compound (D). The polybutylene terephthalate resin composition has excellent impact properties and high fluidity.

Polybutylene terephthalate resin composition

The present invention relates to a polybutylene terephthalate resin composition comprising 20 to 50 mass % of a polybutylene terephthalate resin (A) having an intrinsic viscosity of 0.60 to 1.0 dl/g, 20 to 45 mass % of a fibrous filler (B), 1 to 20 mass % of a polycarbonate resin (C) having a melt volume rate (MVR) of 30 cm/10 min or more, 3 to 20 mass % of a copolymerized polybutylene terephthalate resin (D), and 0 to 20 mass % of an inorganic filler (E) other than the fibrous filler (B). The polybutylene terephthalate resin composition can form a molding that remedies sink marks, maintains high heat deflection temperature, and has excellent appearance.

The present invention relates to a polyester resin composition comprising 18 to 35 parts by mass of a polybutylene terephthalate resin (A), 10 to 25 parts by mass of a polyethylene terephthalate resin (B), 10 to 20 parts by mass of a thermoplastic polyester elastomer (C), 0.5 to 5 parts by mass of an epoxy group-containing ethylene copolymer (D), 12 to 20 parts by mass of a spherical and/or amorphous inorganic filler (E), 10 to 35 parts by mass of a glass fiber reinforcing material (F), 0 to 10 parts by mass of a polycarbonate resin (G), and 0 to 2 parts by mass of a transesterification inhibitor (H). The polyester resin composition is excellent in heat resistance, capable of imparting toughness to a molding while remedying sink marks.

Thermoplastic polyester resin composition

A polybutylene terephthalate resin composition for bonding a polyester elastomer for use in a molded article for welding a polyester elastomer that enables bonding by insert molding; and that ensures a practical bonding strength, even in a portion where stress is generated. The polybutylene terephthalate resin composition comprises: 40 to 95 mass % of a polybutylene terephthalate resin (A); 4 to 40 mass % of a polyester block copolymer (B); 0 to 50 mass % of a copolyester resin (C) different from (B); and 0 to 55 mass % of an inorganic filler (D), the polyester block copolymer (B) comprising, as a constituent, a hard segment composed of a polyester having a specific structure.

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Otsu, Japan

Motonobu Kamiya