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:
Sep. 03, 2002
Filed:
Oct. 06, 2000
Applicant:
Inventors:
Robert N. Webb, Kingwood, TX (US);
Kenneth W. Powers, Berkeley Heights, NJ (US);
Michael F. McDonald, Kingwood, TX (US);
Ralph Howard Schatz, Dillon, CO (US);
Assignee:
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F 4/14 ;
U.S. Cl.
CPC ...
C08F / ; C08F 4/14 ;
Abstract
The invention relates to a new improved catalyst to produce random copolymers of one or more iso-olefin monomers and one or more para-alkylstyrene monomers. The invention also relates to an improved continuous slurry polymerization process to produce random copolymers using the improved catalyst system. The process is carried out in an anhydrous polymerization system containing a mixture of the monomers in a polar solvent along with a Lewis acid and a stabilizing initiator.