Process for preparation of oxymethylene polymers in a homogeneous phase, and use
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United States of America Patent
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May 17, 2011
Grant Date -
Aug 9, 2007
app pub date -
Dec 21, 2006
filing date -
Dec 24, 2005
priority date (Note) -
Expired
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Abstract
A process and an apparatus are described for preparation of oxymethylene polymers. This process encompasses polymerization, in a homogeneous phase, of a monomer which forms oxymethylene groups, as far as 90% of maximum conversion in the presence of an acetal of formaldehyde and of an initiator for cationic polymerization, followed by deactivation of the reaction mixture. The resultant oxymethylene polymers have alkyl ether end groups and are extremely stable.
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