Chisso Corporation

Toyota Jidosha Kabushiki Kaisha

Chisso Corpoation

Teruaki Hayashida

Toshihiro Uwai

Masami Tachibana

Kouichi Hatada

Osamu Kojima

Yoshihiro Kanome

Ken Shimizu

Shinei Gima

Takao Nomura

Takeyoshi Nishio

Nobumasa Ootake

Hiroaki Hase

Hirokazu Nakajima

Tetsuya Matsukawa

The present invention provides such a three-dimensional ladder polymer that has, as a main chain, a silsesquioxane skeleton having a structure of the cage structure of octasilsesquioxane with two broken corners. The polymer of the invention is a polymer obtained by using a silsesquioxane derivative represented by formula (1-0). Reach represents hydrogen, alkyl, cycloalkyl, aryl or arylalkyl, Reach represents chlorine, a group defined as similar to R, or a group having &#x2014;CN, X independently represents hydrogen, chlorine, a group defined as similar to R, or a group having one of &#x2014;CH&#x2550;CH&#x2014;, &#x2014;C&#x2261;C&#x2014;, &#x2014;OH, &#x2014;COOH, &#x2014;COO&#x2014;, 2-oxapropane-1,3-dioyl, oxiranyl, oxiranylene, oxetanyl, oxetanylene, 3,4-epoxycyclohexyl, &#x2014;SH, &#x2014;NCO, &#x2014;NH&#x2014; and &#x2014;NH; and at least two of X each is a reactive group. 

Polymer obtained by using silsesquioxane derivative

Polypropylene resin compositions and interior automotive trim parts

Propylene-ethylene copolymer composition and process for producing the

A catalyst component for olefin polymerization composed of a solid component (IV) and capable of affording a supported type catalyst composed of large particles and having a sharp particle size distribution is provided,

Catalyst component for olefin polymerization

A catalyst for use in polymerization of olefins which comprises a carrier mainly composed of a magnesium compound precipitated from a solution and a catalytic component supported on the carrier and selected from titanium halides, vanadyl halides and vanadium halides is described. The catalyst is obtained by a process which comprises: (A) mixing (a) at least one magnesium compound with (c) a saturated or unsaturated monohydric or polyhydric alcohol for reaction in dissolved state in the presence of (b) carbon dioxide in an inert hydrocarbon solvent to obtain component (A); (B) subjecting the component (A) to mixing and reaction with (d) a titanium and/or a vanadyl halide and/or a vanadium halide of the general formula, VX.sub.r (OR.sup.8).sub.4-r, and also with (e) at least one boron compound, Si compound and/or Siloxane compound thereby obtaining solid product (I); (C) reacting the solid product (I) with (f) a cyclic ether with or without R.sup.12 OH thereby causing dissolution and re-precipitation to obtain solid product (II); and (D) subjecting the solid product (II) to further reaction with (g) component (B) consisting of a titanium halide and/or a vanadyl halide and/or a vanadium halide, and/or a SiX.sub. s (OR.sup.9).sub.4-s, thereby obtaining solid product (III), followed either by further reaction with a mixture of the component (B) and (h) an electron donor or by reaction of (g) with the solid product (III) obtained by the reaction between the solid product (II) and (h) or (h) with (j) electron donor, thereby obtaining solid product (IV) for use as the catalytic component.

Catalysts for polymerization of olefins

Growing community of inventors

Ichihara, Japan

Teruaki Hayashida