Method for the redistribution of polyorganosiloxanes
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United States of America Patent
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Nov 3, 2009
Grant Date -
Jun 19, 2008
app pub date -
Mar 15, 2006
filing date -
May 16, 2005
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Expired
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Abstract
, wherein R′ is an alkyl group containing 1-8 carbon atoms; in the presence of an aqueous hydrochloric acid catalyst; to form a redistributed mixture containing cyclic polyorganosiloxanes and chloro-endblocked polyorganosiloxanes. The process generates less amounts of undesired branched siloxane species than processes which utilize an alumina catalyst.
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