Toyo Boseki Kabushiki Kaisha

Hirota Nagano

Hitoshi Ueno

Toshio Hiramatsu

Naomi Matsumoto

Yasuhiro Nishihara

Tsunehiro Ohshima

An electrical insulating material for use in electrical insulators, for example, for insulated electric wires such as internal wiring of electronic equipment, automobiles or the like, electrical insulating covers produced from the electrical insulating material and a method of electrical insulation using the material are provided. More particularly, it relates to an electrical insulating material which is excellent in mechanical properties and durability, an electrical insulating cover produced from the material and a method of electrical insulation using the material.

Electrical insulating material and method for fastening a shaped body

A polyester elastomer composition comprising a polyester block copolymer and a compound having, in one molecule, not less than two functional groups capable of reacting with a terminal group of the polyester block copolymer, and showing (A) a weight loss (volatility) at 150.degree. C., 2 hours of not more than 0.4% and (B) a gelation degree (gel fraction) at 250.degree. C., 4 hours of not more than 50%; and a polyester elastomer composition comprising a polyester block copolymer, a compound having, in one molecule, not less than two functional groups capable of reacting with a terminal group of the polyester block copolymer and a chain extender heating loss percentage satisfying the formula: (W1-W2)/W1.ltoreq.0.1, and a stabilizer comprising a tertiary amine as a part of its skeleton. From such composition, an elastomer molded product having fine mechanical strength, heat resistance and resistance to hydrolysis, which shows less volatility during heating and less gel and bleed out, can be obtained.

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Otsu, Japan

Hirota Nagano