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. 08, 2003
Filed:
Dec. 10, 2001
Halogenated, high molecular weight, gel-free isobutene copolymers with elevated double bond contents
Applicant:
Inventors:
Gerhard Langstein, Kürten, DE;
Martin Bohnenpoll, Leverkusen, DE;
Anthony Sumner, Köln, DE;
Marc Verhelst, Schoten, BE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 8/22 ;
U.S. Cl.
CPC ...
C08F 8/22 ;
Abstract
The present invention relates to halogenated, low-gel, high molecular weight isoolefin multiolefin copolymers, in particular to halogenated, low-gel, high molecular weight butyl rubbers, and halogenated, low-gel, high molecular weight isoolefin multiolefin copolymers synthesized from isobutene, isoprene and optionally further monomers, with a multiolefin content of greater than 2.5 mol %, a molecular weight M of greater than 240 kg/mol and a gel content of less than 1.2 wt. % and a process for their preparation.