16-08-2012 дата публикации
Номер: US20120207996A1
An elastomeric composition, and method of making the same, useful for forming thin films and sheets, comprising 55-60% hydrogenated SEEPS having a number average molecular weight of 90,000 to 100,000, 7-12% polystyrene, 15-30% oil, and 5 to 20% of an aliphatic hydrogenated hydrocarbon resin. 1. An elastomeric composition , comprising (in weight percent):55-60% hydrogenated SEEPS block copolymer having a number average molecular weight of about 90,000 to 100,000,7-12% polystyrene,15-30% oil.2. The elastomeric composition according to claim 1 , further comprising (in weight percent):{'sub': 'g', '5 to 20% of an aliphatic hydrogenated hydrocarbon resin having a glass transition temperature (T° C.) of 65-75° C. and a number average molecular weight of about 700 to 800.'}3. The elastomeric composition according to claim 1 , wherein the hydrogenated SEEPS block copolymer has a mass ratio of isoprene to 1 claim 1 ,3 butadiene from 46/54 to 44/56.4. The elastomeric composition according to claim 2 , wherein the hydrogenated block copolymer has a mass ratio of isoprene to 1 claim 2 ,3 butadiene of from 46/54 to 44/56.5. The elastomeric composition according to claim 2 , wherein the hydrogenated block copolymer has a mass ratio of isoprene to 1 claim 2 ,3 butadiene of 45/55.6. The elastomeric composition according to claim 4 , wherein (in weight percent) the oil comprises 16-20% claim 4 , the polystyrene comprises 8-10% claim 4 , and the aliphatic hydrogenated hydrocarbon resin comprises 10-16% of the elastomeric composition.7. The elastomeric composition according to claim 1 , further comprising (in weight percent):{'sub': 'g', '5 to 20% of an aliphatic hydrogenated hydrocarbon resin having a glass transition temperature (T° C.) of 65-75° C. and a number average molecular weight of 650 to 750.'}8. A film comprising the elastomeric composition of claim 1 , wherein the film has a thickness of 2-10 mils.9. An elastomeric composition according to claim 2 , wherein the ...
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