Polyplastics Co., Ltd.

Hiroshi Nakatsuji

Katsuhiko Takahashi

Tsuneyoshi Okada

Hiroshi Hotta

Takeshi Asano

Tuneyasu Nakashima

Michio Nakano

Seiichi Higashiyama

Hiroshi Okuda

Hiroyasu Komazawa

Noboru Gotoh

Hirouki Amono

Kiyoshi Yoko

Tsuneyasu Nakashima

A resin composition comprises a polybutylene terephthalate, a halogenated bisimide having the formula (1) and a polytetrafluoroethylene resin and is improved in flame retardancy and at the same time moulding properties. It is useful for parts of electric instruments. ##STR1##

Flame-retardant polybutylene terephthalate resin composition and molded

A polyester composition is disclosed which includes a polyester, (a) a thermoplastic elastomer and (b) a carbodiimide compound having at least one carbodiimide group and which exhibits improved impact resistance at low temperatures and stability to heat, hot water and steam. The composition is useful to form parts which are exposed to low temperatures. A polyalkylene terephthalate resin composition is also disclosed which includes a polyalkylene terephthalate resin, (a) at least one selected from the group consisting of ethylene/alkyl acrylate and a thermoplastic polyester elastomer and (b) at least one selected from the group consisting of an epoxy resin containing at least two carbodiimide groups in the molecule.

Polyester composition

After crude polyacetal polymers mainly comprising bonded oxymethylene groups in the main chain thereof were once molten, they are heated at temperatures of 80.degree. C. or above in liquid mediums, in which said crude polyacetal polymers are insoluble, with keeping a heterogeneous system after they were once molten.

Method of producing polyacetal polymer showing improved heat resistance

A crude polyacetal polymer obtained by polymerization or copolymerization and having as a principal component thereof connected oxymethylene radicals in a main chain is treated in a non-soluble liquid medium at temperatures higher than 80.degree. C. but lower than the melting point of the polymer and at heterogeneous equilibrium, moving the crude polymer and the non-soluble medium in opposite directions relative to each other.

Method of producing an improved polyacetal polymer

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Fuji, Japan

Hiroshi Nakatsuji