Flame-retarding carbon dioxide/epoxide copolymer and method for preparing the same
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United States of America Patent
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Jun 21, 2016
Grant Date -
Dec 25, 2014
app pub date -
Sep 9, 2014
filing date -
Feb 10, 2011
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Abstract
There is provided a method for preparing a low-molecular weight poly(alkylene carbonate) of which the molecular weight and chain shape are precisely controlled, by introducing a phosphorous compound having a hydroxyl group as a chain transfer agent in order to regulate the molecular weight, in alternating copolymerizing an epoxide compound and carbon dioxide by using trivalent metal complex prepared from a Salen type ligand containing a quaternary ammonium salt, and a polymer prepared by the method.
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