Propylene ethylene polymers and production process
US8501892B2 · kind B2 · utility
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261References
16Claims
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Key dates
| Filing date | Aug 26, 2011 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Aug 26, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Ethylene propylene copolymers, substantially free of diene, are described. The copolymers will have a uniform distribution of both tacticity and comonomer between copolymer chains. Further, the copolymers will exhibit a statistically insignificant intramolecular difference of tacticity. The copolymers are made in the presence of a metallocene catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.