Patent · US Expired

Single-stage process for the preparation of polyisobutylene carboxylic acids

US5484857A · kind A · utility

3Cited by

5References

5Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Richard Weider · Leverkusen, DE
Thomas Scholl · New Haven, US
Burkhard Kohler · Leverkusen, DE
Bernhard Jansen · Cologne, DE

Key dates

Filing date	Jan 17, 1995
Grant date	Jan 16, 1996
Priority date	—
Expiry date	Jan 17, 2015

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F2810/50
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a single-stage process for the preparation of polyisobutylene carboxylic acids from isobutylene-diene copolymers, which are optionally crosslinked or branched by means of a diolefine in the known manner, by reaction with ozone in the presence of a solvent.

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