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:
Apr. 03, 2001
Filed:
Jun. 18, 1998
Applicant:
Inventors:
Jing-Cherng Tsai, Hsinchu, TW;
Yi-Chun Chen, Hsinchu, TW;
Sheng Te Yang, Hsinchu, TW;
Meei-Hwa Wang, Chu-Nan, TW;
Shian-Jy Wang, Hsinchu, TW;
Assignee:
Industrial Technology Research Institute, Hsinchu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F 4/44 ; C08F 4/52 ; C08F 4/76 ;
U.S. Cl.
CPC ...
C08F 4/44 ; C08F 4/52 ; C08F 4/76 ;
Abstract
A catalyst composition for preparing high-syndiotacticity polystyrene polymers which comprises: (a) a titanium complex represented by the following formula of TiR′,R′,R′,R′,or TiR′,R′,R′,, wherein R′,, R′,, R′,, and R′,are, independently, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an amino group, a hydrogen atom, or a halogen atom; (b) a cyclopentadienyl complex represented by the following formula: