Poly(styrene-butadiene-styrene)polymers having a high vinyl content in the butadiene block and hot melt adhesive composition comprising said polymers
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United States of America Patent
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Apr 14, 2009
Grant Date -
Aug 17, 2006
app pub date -
Apr 5, 2006
filing date -
Mar 24, 2003
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Abstract
The present invention provides a poly(styrene-butadiene-styrene) polymer having a high vinyl content in the butadiene block. The polymer also has a polystyrene content from 15% to 20% by weight; a coupling efficiency from 50 to 80%; a styrene block molecular weight from 9,000 to 10,000 g/mol; a vinyl content from 20 to 45%; and a melt flow rate of equal to or greater than 10.
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