High performance elastic laminates made from high molecular weight styrenic tetrablock copolymer
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United States of America Patent
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Jul 12, 2005
Grant Date -
Oct 7, 2004
app pub date -
Mar 24, 2003
filing date -
Mar 24, 2003
priority date (Note) -
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Abstract
An elastic laminate is provided which has an elastic layer and one or two outer facing layers. The elastic layer is formed from an improved styrene-(ethylene-butylene)-styrene-(ethylene-butylene) tetrablock copolymer, or a blend of the copolymer. The copolymer has a number average molecular weight of at least about 70,000. The two ethylene-butylene blocks have number average molecular weights which together constitute more than 75% of the number average molecular weight of the copolymer.
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