Daicel Chemical Industries, Ltd.

Takashi Arai

Kazuo Soga

Toshiya Uozumi

Tatsuya Kanno

Shigeyuki Yoshida

Yoshiaki Yamaguchi

A modified styrene-based resin composition in which silicone powder is added to styrene-based resin. One can obtain styrene-based resin compositions remarkably improved in impact resistance and sliding properties, particularly in permanence during sliding. In particular, when the base material is transparent polystyrene-based resin, it was found that the present invention can provide styrene-based resin compositions having excellent impact strength, sliding properties, and transparency without spoiling their fluidity and thermostability. In addition, use of rubber modified polystyrene as styrene-based resin permits styrene-based resin compositions exhibiting well-balanced impact resistance, sliding properties, heat distortion resistance, molding properties, workability, and surface appearance of molded articles. Thus, the present invention enables general-purpose styrene-based rigid thermoplastics to be used for various applications, that is, it allows improvement of such thermoplastics particularly in adaptability to injection molding, extrusion molding and the like, and thereby will contributes to extension of the range of their application.

Styrene-based resin compositions and molded articles thereof

A catalyst for producing a poly-.alpha.-olefin which comprises a metallocene compound containing an element of group IVA bonded to an organic polymer containing an element of group IVB; and a process for producing a poly-.alpha.-olefin which comprises polymerizing an .alpha.-olefin in the presence of the above-described catalyst and also a specified aluminoxane as a co-catalyst.

Catalyst for producing polyolefin and process for producing polyolefin

A catalyst for producing a poly-.alpha.-olefin which comprises a metallocene compound containing an element of group IVA bonded to an organic polymer containing an element of the group IVB; and a process for producing a poly-.alpha.-olefin which comprises polymerizing an .alpha.-olefin in the presence of the above-described catalyst and also a specified aluminoxane as a co-catalyst.

Growing community of inventors

Ishikawa, Japan

Takashi Arai