Expandable vinyl aromatic polymeric compositions
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United States of America Patent
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Jun 30, 2020
Grant Date -
Aug 4, 2016
app pub date -
Jan 29, 2016
filing date -
Jan 30, 2015
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Abstract
The application relates to an expandable polymeric composition with an enhanced processability, which comprises a polymeric base, an expanding agent, and an additive with a plasticizing effect; said polymeric composition being characterized in that:
- the molecular mass at the maximum peak Mp of (i) ranges from 130 kDa to 190 kDa and the centrifugal average molecular mass Mz of (i) ranges from 430 kDa to 900 kDa,the difference in the glass-transition temperature (DTg) measured between a vinyl aromatic polymer having a molecular weight distribution (MWD) of (i) and composition of the vinyl aromatic fraction alone of (i), and a polymeric composition consisting of (i) and (iii), ranges from 1° C. to 8° C.
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