Toray Industries, Inc.

Naoya Yoda

Toshikazu Aoyama

Hiroshi Kodama

Hotuma Okasaka

Yukinori Kimata

Masaru Kurihara

Chiaki Tanaka

Takashi Kubota

Saburo Fujita

Noriaki Dokoshi

Toshiya Yoshi-i

Hiroshi Mochizuki

Hirosuke Yumoto

A glass fiber reinforced flame retarding polyester composition containing decabromodiphenyl ether and/or decabromodiphenyl together with antimony trioxide wherein the ratio by weight of bromine atom to antimony atom is within the range of 0.15 to 0.29. The composition has excellent durability for thermal degradation and improved coloring properties in shaped form.

Flame retarding polyester composition

A process is provided for manufacturing heat resistant polymeric film. A concentrated polymer composition containing solvent is provided, which composition is a solid at room temperature. The composition comprises (a) a polymer having in the repeating units thereof a member selected from the group consisting of precursor units which on heat curing form heterocyclic rings, and a mixture of said precursor units and heterocyclic rings formed from said precursor units and (b) 25-130% by weight of an organic solvent for said polymer, the composition being a solid at room temperature. According to the process, the solid composition is heated to a temperature above room temperature and is extruded into film at this high temperature to form film at a temperature above room temperature and below the curing temperature of the polymer. The resulting film, prior to curing, is subjected to an extraction step using an extraction compound selected from the group consisting of water, aliphatic and aromatic hydrocarbons, hydrocarbon halide, ketones and hydroxyhydrocarbons, and such curing is achieved by maintaining contact for a time sufficient to extract some of the solvent from the film. The resulting film is thereafter cured with an effective amount of heat sufficient to cause ring closure of said precursor units, thereby forming the heat resistant polymeric film.

Process for the production of a shaped article of a heat resistant

This invention relates to a thermoplastic resin composition having reduced flammability which comprises a flammable thermoplastic resin, a flame-retarding agent composed of combined halogenated aromatic compound and an organic compound having a cyanurate or isocyanurate ring structure. The composition has well-balanced physical properties and has an especially good external appearance and elongation together with flame resistance.

Thermoplastic resin composition having reduced flammability

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Nagoya, Japan

Naoya Yoda