Patent · US Expired

Highly branched (co)polycarbonates having improved flowability

US6894142B2 · kind B2 · utility

4Cited by

6References

6Claims

0Family size

Assignee

Bayer MaterialScience AG · DE

Inventors

Helmut-Werner Heuer · Krefeld, DE
Rolf Wehrmann · Krefeld, DE
Michael Erkelenz · Duisburg, DE

Key dates

Filing date	Apr 1, 2004
Grant date	May 17, 2005
Priority date	—
Expiry date	May 9, 2024

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G64/14
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process of preparing a branched (co)polycarbonate resin is disclosed. The process entails using at least one compound conforming to formulae 1a or 1b in which

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