EXPANDABLE POLYMERS OF CELLULOSE ACETATE BUTYRATE
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United States of America Patent
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Issued Date -
Feb 14, 2013
app pub date -
Dec 30, 2010
filing date -
Dec 30, 2009
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Abstract
The invention relates to expandable polymers and/or polymer granulates of cellulose acetate butyrate (CAB) having an average molecular weight (Mn), determined as polystyrene-equivalent molecular weight by means of gel chromatography, of ≧20.000 g/mol and an average butyryl content of cellulose acetate butyrate of ≧20 wt. %, preferably ≧30 wt. %, and corresponding polymer foams.
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