Bridgestone Tire Company Limited

Masumi Saito

Takashi Ohashi

Toshio Yukuta

Minoru Kojima

Katsuhiko Arai

Yoshiko Taniguchi

Toru Okuyama

Ryozo Sakata

Kazuo Haga

Takao Aoki

The flexible polyurethane foams having high flame resistance and smoke resistance can be produced by reacting a polyhydroxyl compound and a polyisocyanate with a urea derivative selected from the group consisting of

Method for producing flame- and smoke-resistant polyurethane foam sheet

Flame-and smoke-resistant flexible polyurethane foam and compressed foam

An excellent flame- and smoke-retardant non-shrinkable polyurethane foam is prepared by reacting a polyhydroxyl compound consisting of

Excellent flame-and smoke-retardant non-shrinkable polyurethane foam

A flame-resistant and smoke-retardant polyurethane foam is produced by reacting a polyisocyanate with a polyhydroxyl compound in the presence of an alkaline earth metal salt of a carboxylic acid and a foaming agent.

Process for production of flame-resistant and smoke-retardant

A thermoplastic and organic solvent-soluble poly(amide-imide) elastomer having a number average molecular weight ranging from 10,000 to 100,000, prepared by reacting (1) an acid anhydride functional polymer, represented by the following formula ##STR1## or a mixture of said acid anhydride functional polymer (1) and a tetracarboxylic acid dianhydride, with (2) a dicarboxylic acid dihydrazide in the presence of an aprotic dipolar solvent at a temperature ranging from -10.degree. C to 30.degree. C.

Process for preparing organic solvent-soluble poly(amide-imide)

A flexible elastomer resin having an improved impact resistance and strength is produced by reacting an acid anhydride group functional polymer, which is prepared by reacting a hydroxyl group functional polymer having a number average molecular weight of 400 to 10,000 and containing at least two hydroxyl groups at the end or the side chain with a tricarboxylic acid anhydride monohalide, with at least one nitrogen compound having polyfunctional active hydrogens and at least one epoxy resin having at least one epoxy group.

Method of producing elastomer resins

A dihalocyclopropane functional multi-component copolymer is produced by reacting olefin bond units contained in the side chain or in the cyclic group in the main chain of a multi-component copolymer with dihalocarbene generated from halogenated hydrocarbon in the presence of a cation surfactant catalyst by using an alkali aqueous solution. The dihalocyclopropane functional multi-component copolymer has an excellent compatibility as a polymer to be blended with the general purpose rubber and as a halogenated rubber series industrial material.

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Tanashi, Japan

Masumi Saito