The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 18, 1993
Filed:
Oct. 03, 1991
Applicant:
Inventors:
Assignee:
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08K / ; C08F / ;
U.S. Cl.
CPC ...
524779 ; 524783 ; 524785 ; 524786 ; 524788 ; 524790 ; 526160 ;
Abstract
A process for producing a styrene-based polymer, particularly a styrene-based polymer having mainly a syndiotactic structure by polymerizing a styrene-based monomer in the presence of a filler by using a catalyst containing (A) a titanium compound and (B) aluminoxane as main components. The filler acts as a catalyst carrier, increasing catalyst activity, and thus de-ashing treatment is not needed. When the filler is used in a large amount, there is obtained a composition in which the filler is uniformly dispersed in the styrene-based polymer. The styrene-based polymer or styrene-based polymer-containing composition is excellent in heat resistance and chemical resistance.