Chisso Corporation

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Chisso Petrochemical Corporation

Seiki Mitani

Masato Nakano

Hiroshi Yamazaki

Jun Saito

Masato Harada

Keisuke Kimura

Mina Koyama

Ryushi Shundo

Tsutomu Ushioda

Kazumi Hagihara

A polymerizable liquid crystal composition excellent in storage stability and UV curing property and a polymer thereof are provided. The polymerizable liquid crystal composition contains a compound represented by formula (1) as a component (A), an optically active compound represented by formula (2) as a component (B), and a mixture of a photopolymerization initiator and a photosensitizer as a component (C), and a ratio of the component (A) is from 77 to 98% by weight, a ratio of the component (B) is from 1 to 15% by weight, and a ratio of the component (C) is from 1 to 8% by weight, based on a total weight of the composition: wherein Z independently represents a single bond or alkylene having from 1 to 10 carbon atoms; Yindependently represents a single bond or &#x2014;O&#x2014;; Rrepresents methyl or ethyl; Aand Aeach independently represents 1,4-phenylene or 4,4'-biphenylene; Yrepresents &#x2014;COO&#x2014; or &#x2014;OCO&#x2014;; Q represents a single bond or oxyalkylene having from 1 to 10 carbon atoms; and p represents 0 or 1.

Polymerizable liquid crystal composition

Metallocene compounds having indenyl ligand and catalysts for olefin polymerization containing the same

&mgr;-oxo-bis-metallocene complex compounds and catalysts using same for the polymerization of olefins as well as polymerization process

A metallocene compound is provided wherein to a transition metal compound is bonded a multidentate compound wherein a substituted cycloalkadienyl ring CA,having therein a heteroaromatic group Ra containing an oxygen, sulfur or nitrogen atom on a cycloalkadienyl ring, preferably the five-membered ring thereof, and an unsubstituted or substituted cycloalkadienyl group CA,or &mdash;(R,)N&mdash;, &mdash;O&mdash;, &mdash;S&mdash; or &mdash;(R,)P&mdash;, preferably CA,, more preferably a substituted cycloalkadienyl group identical with CA,are bonded through a divalent linking group. The metallocene compound is suitable as a principal ingredient of a catalyst for the polymerization of olefins, particularly achieving a very high effect in making the molecular weight of a polypropylene higher.

Metallocene compounds, processes for the preparation thereof, catalyst components for olefin polymerization, and processes for the production of olefin polymers

Disclosed is a process for the preparation of metallocone complexes wherein stereoisomers of metallocene complexes formed at the time of synthesis can easily be separated. The gist of the present invention resides in separation of a part of an isomeric mixture of specific metallocene complexes bridged with a transition metal represented by the formula (1) as a complex having M&mdash;O bond. In particular, preferable is a process for separating a part of an isomeric mixture of a metallocene complex represented by the formula (2) as a &mgr;-oxo-complex represented by the formula (3).

Processes for the preparation of metallocene complexes

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Ichihara, Japan

Seiki Mitani