Kaneka Corporation

Hiroshi Tsuneishi

Akira Takaki

Nobuo Miyatake

Kazunori Saegusa

Tomomichi Hashimoto

Jun Fukuzawa

Toru Yoshida

Kazuaki Matsumoto

Yoshitaka Ono

Shun Wachi

Takahiro Ohishi

Kiyoshi Mori

Hiroshi Tone

Takeshi Kawamura

Akihisa Hirota

Takuya Maeda

Takamasa Imai

Process for producing expanded polyolefin resin particles with use as a foaming agent in water contained in an aqueous dispersion medium. The process includes dispersing polyolefin resin particles with use as a foaming agent of water contained in an aqueous dispersion medium. The process includes dispersing polyolefin resin particles together with the aqueous dispersion medium into a closed vessel, heating the polyolefin resin particles up to or above a softening temperature of the polyolefin resin particles and pressurizing the polyolefin resin particles, and releasing the polyolefin resin particles into a zone whose pressure is lower than an internal pressure of the closed vessel. The polyolefin resin particles are composed of a polyolefin resin composition including a polyolefin resin, polyethylene glycol homopolymer and a foam nucleating agent.

Process for producing expanded polyolefin resin particles and expanded polyolefin resin particles

Provided are polypropylene resin pre-foamed particles including, as base resin, polypropylene resin that satisfies the following requirements (a) through (c): (a) in cross fractionation chromatography, an amount of components eluted at a temperature of not more than 40&#xb0; C. is not more than 2.0% by weight; (b) a melting point is not less than 100&#xb0; C. but not more than 160&#xb0; C.; and (c) propylene monomer units are present in an amount of not less than 90 mol % but not more than 100 mol %, and olefin units each having a carbon number of 2 or 4 or more are present in an amount of not less than 0 mol % but not more than 10 mol %. The polypropylene resin pre-foamed particles can be molded by in-mold foaming molding at a not high molding heating steam pressure, and a polypropylene resin in-mold foaming molded product excellent in dimensional stability at high temperatures can be prepared from the polypropylene resin pre-foamed particles.

Polypropylene resin pre-foamed particle and method for producing same, and polypropylene resin in-mold foaming molded article

Provided is a process for producing expanded polyolefin resin particles whose cells are not made nonuniform or extremely smaller as seen in conventional expanded particles, whose cell diameter and expansion ratio can be easily controlled independently, and which, when subjected to in-mold expansion molding, give in-mold expanded molded products satisfactory in fusibility and excellent in surface properties. The process is a process for producing expanded polyolefin resin particles by: dispersing polyolefin resin particles together with an aqueous dispersion medium into a closed vessel; heating the polyolefin resin particles up to or above a softening temperature of the polyolefin resin particles; and releasing the polyolefin resin particles into a zone whose pressure is lower than an internal pressure of the closed vessel, with use as a foaming agent of water serving as the dispersion medium, the polyolefin resin particles being composed of a polyolefin resin composition including: polyolefin resin; a substance selected from among polyethylene glycol, polyvalent alcohol having a carbon number of not less than 3 to not more than 6, and a water-absorbing substance having no function of forming foaming nuclei; and a foam nucleating agent.

The present invention provides a polyorganosiloxane-containing graft copolymer A polyorganosiloxane-containing graft copolymer

Graft copolymers and impact-resistant flame-retardant resin compositions containing the same

The object of the present invention is to provide

Flame-retardant thermoplastic resin composition

Flame retardant and flame-retardant resin composition containing the same

Process for producing chlorinated tertiary carbon-containing hydrocarbons

Growing community of inventors

Osaka, Japan

Hiroshi Tsuneishi