Asahi Kasei Kabushiki Kaisha

Asahi Kasei Chemicals Corporation

Katsuhiro Iwase

Harumi Watanabe

Keigo Sasaki

Miyuki Kazunori

Junichi Yoshida

Masaaki Aramaki

Fumiki Murakami

Yuji Kosugi

Shoji Otani

Hiroshi Fukuoka

Toshiharu Seyama

Takuto Nakata

Tatsuro Toda

Shota Ide

Hisanari Yoneda

A polyphenylene ether having a predetermined structure. 

Polyphenylene ether, composition of the same, and manufacturing method of the same

Provided is a method for manufacturing a methacrylic resin composition having excellent surface processability and displaying excellent preservability of formed surface processing. A method for manufacturing a methacrylic resin composition, wherein the methacrylic resin composition comprises two or more types of methacrylic resins that each have a structural unit (X) having the same type of cyclic structure-containing main chain, the methacrylic resin composition has a Vicat softening temperature of 120&#xb0; C. to 160&#xb0; C., methanol-soluble content is contained in an amount of 5 mass % or less relative to 100 mass %, in total, of the methanol-soluble content and methanol-insoluble content, comprising mixing a low molecular weight component and a high molecular weight component.

Method for manufacturing methacrylic resin composition

Methacrylic resin having high heat resistance, highly controlled birefringence, excellent color tone and transparency, and excellent moldability is provided. A methacrylic resin comprises a structural unit (B) having a cyclic structure-containing main chain, the structural unit (B) including at least one structural unit selected from the group consisting of an N-substituted maleimide-based structural unit (B-1) and a lactone ring structural unit (B-2), wherein a glass transition temperature is more than 120&#xb0; C. and 160&#xb0; C. or less, an amount of a methanol-soluble content is 5 mass % or less relative to 100 mass % of a total amount of the methanol-soluble content and a methanol-insoluble content in the methacrylic resin, and an yellowness index YI measured using a 10 cm optical path length cell for a 20 w/v % chloroform solution of the methanol-insoluble content is 0 to 7.

Methacrylic resin

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

There is provided a catalyst composition for polymerizing a conjugated diene monomer containing a rare earth complex having a specific structure and a specific compound.

Catalyst composition for polymerizing conjugated diene monomer

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Tokyo, Japan

Katsuhiro Iwase