Preparation of polytrimthylene ether glycol or copolymers thereof
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United States of America Patent
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Apr 3, 2012
Grant Date -
May 7, 2009
app pub date -
Oct 31, 2008
filing date -
Nov 1, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof by a polycondensation reaction using at least one acid catalyst, wherein the temperature of the reaction is controlled such that the average temperature during the first half of the reaction is higher than the average temperature during the second half of the reaction.
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