Patent · US Expired

Preparation of aliphatic oligocarbonate polyols

US7317121B2 · kind B2 · utility

0Cited by

1References

5Claims

0Family size

Assignee

Bayer MaterialScience AG · DE

Inventors

Steffen Hofacker · Rockenberg, DE
Herbert Witossek · Leipzig, DE
Lothar Backer · Gräfenhainichen, DE

Key dates

Filing date	Sep 15, 2004
Grant date	Jan 8, 2008
Priority date	—
Expiry date	Sep 22, 2025

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G64/305
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to an improved process for preparing aliphatic oligocarbonate polyols by transesterifying dimethyl carbonate (DMC) with an aliphatic polyol component.

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