Patent · US Active

Preparation of polytrimethylene ether glycol or copolymers thereof

US8143371B2 · kind B2 · utility

0Cited by

15References

23Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Mark Andrew Harmer · Kennett Square, US
Christian Hoffmann · Leonberg, DE
Scott Christopher Jackson · Wilmington, US
Edward R. Murphy · Issaquah, US
Rupert Spence · Calgary, CA

Key dates

Filing date	Oct 31, 2008
Grant date	Mar 27, 2012
Priority date	—
Expiry date	Aug 4, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2205/05
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof having a number-average molecular weight of at least about 250 g/mole by a polycondensation reaction using at least one acid catalyst.

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