Blends of low crystallinity, low molecular weight propylene copolymers and styrenic block copolymers
US8052822B2 · kind B2 · utility
3Cited by
3References
20Claims
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Key dates
| Filing date | Feb 15, 2008 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Apr 12, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L91/005
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Styrenic block copolymers are blended with propylene copolymers to provide polymeric compositions with an improved balance between processability and elasticity. The compositions have improved processability by facilitating the ease with which a rubbery material, usually difficult to melt process, can be processed at high line speeds, which in turn improves the formation of the composition into films or other articles, assisted by a desired level of melt elasticity, i.e., a high elastic extension and recovery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.