Patent · US Expired

Polyethers and their use as mold release agents for plastics

US4889908A · kind A · utility

8Cited by

5References

10Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Joachim Franke · Koblenzer Straße, DE
Wilhelm Goyert · Leverkusen, DE
Helmut Kipphardt · Cologne, DE

Key dates

Filing date	Sep 28, 1988
Grant date	Dec 26, 1989
Priority date	—
Expiry date	Sep 28, 2008

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2125/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention is directed to polyethers obtained by the reaction of a substituted 1,2-epoxy-alkane bearing at least one alkyl substituent containing at least 8 carbon atoms with at least one polyol corresponding to the formula EQU R(OH).sub.x (1) wherein PA1 R is an organic radical and PA1 x is an integer having a value of 2 or more, PA1 2 or more moles of epoxyalkane being added onto the polyol (1). The present invention is also directed to a process for the preparation of high molecular weight polymers wherein the process is conducted in the presence of the previously described polyethers as a mold release agent.

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