Patent · US Expired

Halogenated, high molecular weight, gel-free isobutene copolymers with elevated double bond contents

US6545100B2 · kind B2 · utility

0Cited by

8References

10Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Gerhard Langstein · Kürten, DE
Martin Bohnenpoll · Cologne, DE
Anthony Sumner · Recklinghausen, DE
Marc Verhelst · Schoten, BE

Key dates

Filing date	Dec 10, 2001
Grant date	Apr 8, 2003
Priority date	—
Expiry date	Dec 10, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F210/12
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

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 Mw of greater than 240 kg/mol and a gel content of less than 1.2 wt. % and a process for their preparation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.