Asahi Kasei Kabushiki Kaisha

Asahi Kasei Chemicals Corporation

Fumiki Murakami

Nobuhiro Kobayashi

Atsushi Nanasawa

Jun-ichi Nakahashi

Harumi Watanabe

Masami Yonemura

Katsuhiro Iwase

Toshiharu Seyama

Miyuki Kazunori

Keigo Sasaki

Yutaka Tada

Junnichi Nakahashi

Chihiro Hiramoto

Tomoyuki Fujita

Yumika Kurihara

The present invention provides a methacrylic resin composition comprising

Methacrylic resin composition and molded article

A methacrylic resin composition comprises a methacrylic resin, the methacrylic resin comprising: 50 mass % to 97 mass % of a methacrylic acid ester monomer unit (A); 3 mass % to 30 mass % of a structural unit (B) having a cyclic structure-containing main chain; and 0 mass % to 20 mass % of another vinyl monomer unit (C) that is copolymerizable with a methacrylic acid ester monomer, wherein the methacrylic resin satisfies a specific condition; and the composition has a weight average molecular weight residual ratio of 80% or more upon heating under a nitrogen atmosphere at 280&#xb0; C. for 1 hour, and has a weight average molecular weight residual ratio of 80% or more upon heating in air at 280&#xb0; C. for 0.5 hours.

Methacrylic resin composition and shaped product

Provided are a methacrylic resin composition and a film containing a methacrylic resin that includes: 50 mass % to 97 mass % of a methacrylic acid ester monomer unit (A); 3 mass % to 30 mass % of a structural unit (B) having a cyclic structure-containing main chain; and 0 mass % to 20 mass % of another vinyl monomer unit (C) that is copolymerizable with a methacrylic acid ester monomer. The methacrylic resin satisfies the following conditions (1) and (2): (1) the methacrylic resin has a weight average molecular weight of 65,000 to 300,000 as measured by GPC; and (2) the total content of specific components is 0.01 mass % to 0.40 mass % as determined by GC/MS.

Methacrylic resin, methacrylic resin composition, film, and production method

A methacrylic resin composition having high heat resistance, excellent birefringence, and excellent heat stability and molding processability is provided. A methacrylic resin composition comprises: a methacrylic resin including a structural unit (X) having a cyclic structure-containing main chain, the structural unit (X) being at least one type selected from the group consisting of an N-substituted maleimide monomer-derived structural unit, a glutarimide-based structural unit, and a lactone ring structural unit; and an organic phosphorous compound, wherein a glass transition temperature is more than 120&#xb0; C. and 160&#xb0; C. or less, a content of a phosphorus element is 10 mass ppm to 1000 mass ppm, and a ratio P3/P5 of an integral value P3 of a spectral peak assigned to trivalent phosphorus to an integral value P5 of a spectral peak assigned to pentavalent phosphorus inP-NMR measurement is 0.2 to 5.0.

Methacrylic resin composition

A vehicle part cover including a methacrylic-based resin (I) having a weight average molecular weight measured by gel permeation chromatography (GPC) of 65,000 to 300,000,

Vehicle part cover including methacrylic-based resin

A methacrylic resin, including 80 to 99.5% by mass of a methacrylic acid ester monomer unit, and 0.5 to 20% by mass of other vinyl monomer unit which is copolymerizable with at least one of the methacrylic acid ester, wherein the methacrylic resin satisfies the following conditions (I) to (III):

Methacrylic resin, molded article thereof, and method for producing methacrylic resin

A flame retardant resin composition comprising a specified metal oxide and/or trivalent phosphorus compound (A) and a specified phosphazene compound (B) together with an aromatic resin (C) added according to necessity. This flame retardant composition when mixed into resins, can provide resin compositions excelling in flame resistance, low smoke emission, heat resistance, moisture absorption resistance, dielectric performance, extrudability, mold release, thermal stability, mechanical properties, etc.

Flame retarder composition

A flame retardant composition comprising a specific phenolic-based resin (A) and a specific phosphor compound (B) can be suitably used for a resin and can provide a resin composition which is excellent in flame retardancy, thermal resistance, moisture resistance, extrusion workability, demolding availability, thermal stability, impact resistance, mechanical properties and the like.

Flame retardant resin composition

A flame-retardant composition comprises a polyphenylene ether resin having a number average molecular weight in terms of polystyrene of 500 to 5,000 and a phosphazene compound, the content of the polyphenylene ether being 20 to 95% by weight and that of the phosphazene compound being 80 to 5% by weight. The flame-retardant composition is excellent in processability when added to resins, and can provide a resin composition that contains no halogens and has an excellent balance of processability, heat resistance and flame retardancy.

Flame retardant composition

A phosphazene composition which has a content of volatile components of not less than 0.02% by weight and not more than 1.0% by weight when it is heated at 200&#xb0; C. for 2 hours; is excellent in resistance to hydrolysis, and when the phosphazene composition is added to a resin, there is provided a resin composition which highly maintains the balance of resistance to hydrolysis, flame retardancy and stability of electric characteristics in a high-frequency field of not less than 1 GHz.

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Tokyo, Japan

Fumiki Murakami