Kuraray Co., Ltd.

Kurarayco., Ltd.

Taketomo Yamashita

Atsuhiro Nakahara

Takuro Niimura

Tomohiro Ono

Takeshi Nakano

Toru Abe

Keiji Kubo

Fumihiko Okabe

Nozomu Sugoh

Nobutaka Hiraoka

Nariaki Fujii

Tomoyuki Matsui

Shigeru Sakamoto

The present invention provides a methacrylic resin composition comprising 75 to 99.8 mass % of a methacrylic resin [A], 0.1 to 15 mass % of a UV absorber [B], and 0.1 to 10 mass % of a polymer [C] having an SP value of 6.0 to 9.7 (cal/cm)calculated by the Fedors method.

Methacrylic resin composition, molded article, and film

A methacrylic resin composition comprising 100 parts by mass of a methacrylic resin having an amount of a terminal double bond of less than 0.012% by mole and an amount of a bonded sulfur atom of preferably less than 0.25% by mole; 5&#xd7;10to 9&#xd7;10part by mass of a metal element having an atomic number of not more than 20 (preferably lithium element and aluminum element); and 0.025 to 0.50 part by mass of a hindered phenol antioxidant such as 2,6-bis(1,1-dimethylethyl)-4-methylphenol, wherein the methacrylic resin composition, when being exposed to a nitrogen gas atmosphere at 290&#xb0; C. for 15 minutes, has a thermogravimetric retention of not less than 98% by mass.

Methacrylic resin composition and use thereof

A methacrylic copolymer having high thermal resistance and low water absorption and being hardly decomposed thermally is provided. The methacrylic copolymer comprises 5 to 22% by mass of a structural unit derived from a monomer represented by formula (1) (in formula (1), Rrepresents a hydrogen atom or a methyl group, Rrepresents a 1C-4C alkyl group, and 'n' is an integer of 1 to 3.) and 78 to 95% by mass of a structural unit derived from a methacrylic acid ester monomer other than the monomer represented by the formula (1), and has a saturated water absorption of not more than 1.6% by mass.

Methacrylic copolymer and molded article

An electrolyte membrane having a structure wherein fine rubber particles having substantially no ion-conducting group and having an average particle size of 20 nm to 1 &#x3bc;m are uniformly dispersed in a matrix including a resin component having ion-conducting group. The electrolyte membrane has high bonding ability to electrodes and does not cause cracks and ruptures because it is kept flexible even under low humid or absolutely dried condition, in addition, shows high ion conductivity even under low humid or absolutely dried condition because the matrix having ion-conducting groups are continuous.

Electrolyte membrane and membrane-electrode assembly

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Tainai, Japan

Taketomo Yamashita