Method for producing polyoxymethlenes
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United States of America Patent
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Mar 15, 2011
Grant Date -
Aug 28, 2008
app pub date -
Jul 13, 2006
filing date -
Jul 20, 2005
priority date (Note) -
Expired
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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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