Process for preparation of oxymethylene polymers, selected polymers, and their use
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United States of America Patent
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Oct 12, 2010
Grant Date -
Aug 2, 2007
app pub date -
Dec 21, 2006
filing date -
Dec 24, 2005
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Expired
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Abstract
A process is described for preparation of oxymethylene homo- and copolymers. This encompasses heterogeneous polymerization of a monomer which forms oxymethylene groups in the presence of an acetal of formaldehyde and of an initiator for cationic polymerization, followed by the deactivation of the polymer in a homogeneous phase via treatment with a basic aprotic solvent or with an aprotic solvent which comprises a base. Oxymethylene homopolymers with very high stability are also described.
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