Patent · US Expired

Copolyether glycols of tetrahydrofuran and alkylene oxides having low oligomeric cyclic ether content

US4251654A · kind A · utility

11Cited by
5References
6Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 14, 1979
Grant dateFeb 17, 1981
Priority date—
Expiry dateAug 14, 1999

Classification

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

Abstract

Tetrahydrofuran/alkylene oxide polymerizates containing no more than 3%, by weight, of oligomeric cyclic ethers are prepared by extracting the ethers from a raw polymerizate with water.

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