Kanegafuchi Kagaku Kogyo Kabushiki Kaisha

Kaneka Corporation

Haruo Tomita

Kazuya Yonezawa

Osamu Miyama

Masahiro Asada

Tetsuo Okura

Noriyuki Suzuki

Taizo Aoyama

Tomoki Hiiro

Shigemi Matsumoto

Katsuhiko Kimura

Kazuhiko Tamai

Mitsuharu Kourogi

Hirosuke Kawabata

Kenji Kurimoto

Shinji Ozawa

Yasuo Okamoto

Hesun Kim

Yoshifumi Fukui

Takeshi Kondo

Kouichi Yamashita

There is provided a foamed article having a low density, large thickness, a high closed cell ratio and a small average cell diameter. A foamed extrusion article having a density of 50 to 10 kg/m,and a closed cell ratio of at least 40% is obtained by mixing a mixed resin comprising (a) 50 to 95 parts by weight of a polypropylene resin having a melt tension at 230&deg; C. of at least 0.05 N, (b) 50 to 5 parts by weight of a polystyrene resin, and (c) 0.5 to 15.0 parts by weight of a hydrogenated block copolymer of styrene, isoprene and styrene based on 100 parts by weight of the polypropylene resin (a) and the polystyrene resin (b) with a foaming agent in an extruder, and then releasing into a low-pressure zone.

Extrusion-foamed board of resin blend comprising modified polypropylene resin and polystyrene resin

Random siloxane copolymer, process for production thereof, and resin

Foam made from modified polypropylene resin and process for the

Graft-modified polyolefin resins and resin compositions containing the

Modified polypropylene resin, foam made thereof and processes for the

A resin composition which includes (A) 100 parts of a blend of a polyacrylate and a poly(alkylene-phenylene ester) and (B) 1-50 parts of a chemically modified polyolefin copolymer exhibits superior impact resistance, particularly low temperature impact resistance, while retaining good melt viscosity for molding. The polyacrylate may be produced by polymerizing a dihydric phenol formula I: ##STR1## with an aromatic dicarboxylic acid, a dichloride derivative, an alkylated derivative or an arylated derivative thereof. The chemically modified polyolefin copolymer has a structural unit containing at least one amide group at and at least one glycidyloxy or glycidyl group, with the number of the structural unit contained in the copolymer being one per from 4 to 5,000 carbon atoms of the polyolefin moiety.

Polyarylate/polyester thermoplastic resin composition having high impact

Thermoplastic resin compositions having excellent heat distortion resistance, impact resistance, chemical resistance and molding properties. The compositions are mixtures of a polyarylate, a polyamide and a specified graft copolymer or modified polyolefin.

Thermoplastic resin composition

A process for preparing a polyglycidyl compound in which an aromatic hydroxycarboxylic acid having phenolic hydroxyl group is reacted with an epihalohydrin in the presence of a phase transfer catalyst and the dehydrohalogenation is then conducted by acting an aqueous alkali solution on the reaction mixture obtained in the first step.

Process for preparing polyglycidyl compounds

A glycidyl compound having the formula (I): ##STR1## wherein R is hydrogen atom or methyl group, p is an integer of 1 to 4 and Ar is aromatic hydrocarbon group selected from the group consisting of groups having the formula (II), (III) and (IV): ##STR2## wherein R.sup.1 R.sup.2 are the same or different and each is an alkyl group having 1 to 4 carbon atoms. The glycidyl compound can be cured by either heat, radical initiators or irradiation of ultraviolet rays and curing compounds prepared by using the glycidyl compound have high heat resistance and high surface hardness.

Glycidyl compound

An epoxy resin of the general formula: ##STR1## wherein X.sub.1 and X.sub.2 are --OH or ##STR2## and X.sub.3 is --OH, ##STR3## or a group of the general formula: ##STR4## in which X.sub.4, X.sub.5 and X.sub.6 are --OH or ##STR5## provided that at least one of X.sub.1 to X.sub.6 is ##STR6## The epoxy resin is prepared by reacting gallic acid or tannic acid with an epihalohydrin in the presence of a phase transfer catalyst and reacting the obtained reaction mixture with an aqueous alkali solution.

Epoxy resin and process for preparing the same

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Kobe, Japan

Haruo Tomita