Patent · US Expired

Process for the preparation of polyether-ester polyols

US4144395A · kind A · utility

27Cited by
4References
6Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 5, 1977
Grant dateMar 13, 1979
Priority date—
Expiry dateDec 5, 1997

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07C67/08
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

Polyether-ester polyols are prepared in the presence of from 0.005 percent to 0.01 percent by weight (50-100 ppm) of a trialkylamine. The resulting polyols have improved color and are obtained in markedly reduced reaction times.

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