High performance elastic laminates made from high molecular weight styrenic tetrablock copolymer
US6916750B2 · kind B2 · utility
46Cited by
237References
56Claims
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Key dates
| Filing date | Mar 24, 2003 |
| Grant date | Jul 12, 2005 |
| Priority date | — |
| Expiry date | Jul 5, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/678
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.