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. 05, 2000
Filed:
Jul. 07, 1997
Applicant:
Inventors:
Gerhard Langstein, Kurten, DE;
Werner Obrecht, Moers, DE;
Judit Eva Puskas, London, CA;
Oskar Nuyken, Munchen, DE;
Karin Weiss, Bindlach, DE;
Assignee:
Bayer AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526226 ; 5263486 ; 5263487 ;
Abstract
Highly branched polyisoolefines are produced according to the invention by the polymerization of isoolefines in a single-stage process, in solution, suspension or in the gas phase in the presence of bifunctional monomers which contain at least one group capable of cationic polymerization and at least one group which serves as an initiator for the cationic polymerization of isoolefines (inimer), at temperatures from +20 to -100.degree. C., optionally in the presence of inert, organic solvents, and in the presence of alkylalumoxanes (coinitiator).