POLY (STYRENE-BUTADIENE-STYRENE) POLYMERS HAVING A HIGH VINYL CONTENT IN THE BUTADIENE BLOCK AND HOT MELT ADHESIVE COMPOSITIONS COMPRISING SAID POLYMERS
The present invention concerns a poly(styrene-butadiene-styrene) polymer having a high vinyl content in the butadiene block comprising in combination a polystyrene content (PSC) within a range of 15-20 % by weight, a coupling efficiency (CE) of 50-80 %, a step I molecular weight (MW) between 9,000 a...
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Main Authors | , , |
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Format | Patent |
Language | English French |
Published |
02.10.2003
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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Summary: | The present invention concerns a poly(styrene-butadiene-styrene) polymer having a high vinyl content in the butadiene block comprising in combination a polystyrene content (PSC) within a range of 15-20 % by weight, a coupling efficiency (CE) of 50-80 %, a step I molecular weight (MW) between 9,000 and 10,000 kg/mol, and a vinyl content between 20-45 %. Hot melt adhesive compositions are also described comprising said SBS polymer together with a tackifying resin, a plasticizer and an anti-oxidant.
L'invention concerne un polymère poly(styrène-butadiène-styrène) à teneur élevée en vinyle dans le bloc butadiène, qui comprend en combinaison une teneur en polystyrène (PSC) située dans la plage comprise entre 15 et 20 % en poids; une efficacité de couplage (CE) comprise entre 50 et 80 %; un poids moléculaire (MW) d'étape 1 compris entre 9000 et 10000 kg/mol; et une teneur en vinyle comprise entre 20 et 45 %. L'invention concerne également des compositions d'adhésif thermofusible comprenant ledit polymère SBS avec une résine gluante, un plastifiant et un antioxydant. |
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Bibliography: | Application Number: WO2003EP03172 |