Patent · US Expired

Method for producing tetrahydrofuran copolymers

US7361793B2 · kind B2 · utility

0Cited by

0References

16Claims

0Family size

Assignee

BASF SE

Inventors

Martin Haubner · Ludwigshafen am Rhein, DE
Rolf Pinkos · Bad Dürkheim, DE

Key dates

Filing date	Mar 30, 2004
Grant date	Apr 22, 2008
Priority date	—
Expiry date	Apr 22, 2024

Classification

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

Abstract

The present invention relates to a process for the single-stage preparation of polyoxyalkylene glycols by copolymerization of THF and alpha, omega-diols in the presence of a heteropolyacid, wherein the content of organically bound nitrogen in the alpha, omega-diol is less than 15 ppm.

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