Unitika Ltd.

Kayomon Kyo

Yasuhiko Asai

Isamu Hirose

Nakaba Asahara

Sadao Kato

Haruo Kohyama

Kenji Yasue

Tadashi Ishikura

Sinichi Tokumitsu

Minolu Kishida

Shinichi Tokumitsu

Kenichirou Nakamoto

Hiroshi Sugawara

Katsuhiro Hirose

Nobuo Suyama

An aromatic polyester copolymer consisting of 10 to 90 mol % of a recurring unit of the formula: ##STR1## and 90 to 10 mol % of a recurring unit of the formula: ##STR2## and having a logarithmic viscosity number of at least 0.3 as measured in a mixture of phenol and tetrachloroethane (6:4 in weight ratio) at a concentration of 1 g/100 cc at 25.degree. C. and having a terminal carboxyl content of about 80 mol eq./ton or less. This aromatic polyester copolymer has high durability under dry and moist heat as well as high resistance to water crazing and hence can be fabricated into useful articles by various molding techniques.

Aromatic copolyester

A resin composition consisting essentially of (A) an aromatic polyester-polycarboxylic anhydride and (B) a polyamide. An article molded from the resin composition exhibits high heat resistance, mechanical properties and moldability. It is particularly resistant to cracking upon impact and is also resistant to breaking at a thin-walled portion.

Aromatic polyester

A fire-retardant resin composition comprising

Fire-retardant resin composition

An aromatic copolyester composition comprising (A) an aromatic copolyester derived from terephthalic acid, isophthalic acid and/or a bisphenol and (B) a metal salt of an organic carboxylic acid, which is suitable for preparation of molded articles having superior mechanical properties and fire retardancy as well as superior thermal stability and reduced crazing.

Aromatic copolyester composition

A resin composition consisting essentially of

Resin composition

An aromatic copolyester composition comprising (A) an aromatic copolyester derived from terephthalic acid, isophthalic acid and a bisphenol and (B) a phosphorus-containing compound represented by the general formula (II) ##STR1## wherein n is 0 or an integer of 1 to 3, and R is an alkyl group containing 1 to 18 carbon atoms, in which one or more of the hydrogen atoms of the alkyl group may be replaced by a halogen atom or a hydrocarbon group. Molded products obtained from the aromatic copolyester composition have markedly reduced coloration and reduced occurrence of water crazing.

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Kyoto, Japan

Kayomon Kyo