Patent · US Expired

Polyether-polycarbonate diols and processes for their production and use

US4808691A · kind A · utility

82Cited by

7References

13Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Klaus Konig · Leverkusen, DE
James-Michael Barnes · Breitscheid, DE

Key dates

Filing date	May 11, 1988
Grant date	Feb 28, 1989
Priority date	—
Expiry date	May 11, 2008

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2110/0033
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polyether polycarbonate diols based on 1,6-hexanediol and having a molecular weight of from 500 to 12,000 are made by etherifying 50-100 mole % 1,6-hexane-diol in the presence of 0-50 mole % of specified diols and reacting the resultant polyether with a compound selected from diarylcarbonates, dialkyl carbonates, dioxolanones, hexanediol bischlorocarbonic acid esters, phosgene and urea. These diols are particularly useful in the production of polyurethanes having improved physical properties.

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