Method for producing polyoxymethlenes

Details Method for producing polyoxymethlenes Method for producing polyoxymethlenes

2011-03-15

2011-03-15

Truong, Duc (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From aldehyde or derivative thereof as reactant

C528S425000, C528S480000, C528S50200C

Reexamination Certificate

active

07906609

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.

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Claims 1-6 and 8-20 of U.S. Appl. No. 11/908,729.
Claims 14-33 of U.S. Appl. No. 11/720,414.

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