Patent · US Active

Method for producing polyoxymethlenes

US7906609B2 · kind B2 · utility

4Cited by

3References

16Claims

0Family size

Assignee

BASF SE

Inventors

Marko Blinzler · Mannheim, DE
Knut Zollner · Mannheim, DE
Claudius Schwittay · Heidelberg, DE
Jens Assmann · Haan, DE

Key dates

Filing date	Jul 13, 2006
Grant date	Mar 15, 2011
Priority date	—
Expiry date	Dec 24, 2027

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2/18
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Process for preparing polyoxymethylene copolymers (POMs) by a) polymerizing a reaction mixture comprising suitable main monomers and comonomers and also a polymerization initiator and, if appropriate, a regulator, b) adding a deactivator and c) removing the residual monomers, wherein the amount of compounds whose melting point at 1013 hPa is below 60° C. present in the reaction mixture at any point in time during the process is not more than 0.1% by weight, with the POM, the monomers, comonomers, polymerization initiators, deactivators and regulators not being included in the calculation.

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