METHOD OF PURIFYING BLOCK COPOLYMERS
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United States of America Patent
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Issued Date -
Mar 11, 2010
app pub date -
Sep 11, 2008
filing date -
Sep 11, 2008
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Abstract
The invention relates to block polymers, for example, arborescent copolymer compounds, and to methods of making and purifying such compounds. In one embodiment, the invention relates to arborescent polymer compounds that contain one or more styrene polymeric blocks in combination with one or more isobutylene polymeric blocks. In another embodiment, the invention relates to methods for purifying arborescent polymer compounds that contain at least one styrene polymeric block in combination with at least one isobutylene polymeric block.
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