Patent · US Active

Oxymethylene polymers and process for the preparation thereof

US8481671B2 · kind B2 · utility

1Cited by

9References

19Claims

0Family size

Assignee

Ticona LLC · US

Inventors

Michael Haubs · Bad Kreuznach, DE
Michael Hoffmockel · Niedernhausen, DE
Jurgen Lingnau · Mainz, DE
Robert M. Gronner · Erlanger, US
Lowell Larson · Independence, US

Key dates

Filing date	May 26, 2010
Grant date	Jul 9, 2013
Priority date	—
Expiry date	Apr 1, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L59/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a process for the preparation of oxymethylene polymers as well as oxymethylene polymers obtainable therefrom. The process includes polymerization of a monomer, which forms —CH2—O— units in the presence of an acetal of formaldehyde or a polyhydric alcohol and an initiator for cationic polymerization. The initiator may be a heteropoly acid or an acid salt thereof which is dissolved in an alkyl ester of a polybasic carboxylic acid.

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