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:
Dec. 15, 1992
Filed:
Feb. 28, 1992
Applicant:
Inventor:
Akira Miyashita, Ageo, JP;
Assignee:
Tosoh Corporation, Shinnanyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
556 27 ; 502104 ; 526160 ;
Abstract
A catalyst for polymerizing an aromatic vinyl compound, having the formula (I): ##STR1## where M is an element of Group IVa; X.sup.1 is a halogen; R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are independently hydrogen or an alkyl group having 1 to 6 carbon atoms; R.sup.8 is hydrogen or an alkyl group having 1 to 5 carbon atoms; m is an integer of from 1 to 6; and n is an integer of from 4 to 60. The vinyl polymer produced has predominantly a syndiotactic structure.