Patent · US Expired

Polyether esters

US4078148A · kind A · utility

3Cited by

1References

18Claims

0Family size

Assignee

Dynamit Nobel GmbH · DE

Inventors

Norbert Vollkommer · Troisdorf, DE
Hermann Richtzenhain
Gerhard Bier · Troisdorf, DE
Manfred Gorlitz

Key dates

Filing date	Oct 10, 1973
Grant date	Mar 7, 1978
Priority date	—
Expiry date	Oct 10, 1993

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G65/20
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polyether ester polymers of tetrahydrofuran and .gamma.-butyrolactone or hexamethyleneoxide and .gamma.-butyrolactone. The polymers are prepared by contacting the mentioned monomers in the presence a fluoride or chloride of antimony or a chloride of tin or titanium. The polymers can be used as components in the preparation of polyurethanes.

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