Long chain branched propylene-alpha-olefin copolymers
US8420760B2 · kind B2 · utility
18Cited by
60References
20Claims
0Family size
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Key dates
| Filing date | Nov 6, 2008 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Jan 23, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31931
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Substantially isotaclic propylene interpolyraets comprise (A) at least 60 weight percent (wt %) units derived from propylene, and (B) between greater than zero and 40 wt % units derived from ethylene, the propylene interpolyrner further characterized by at least one of the following properties: (1) a ratio of less than 1 measured at interpolyraer number average molecular weight (Mn), (2) a relative compositional drift of less than 50%, arid (3) propylene chain segments having a chain isotacticity triad index of at least 70 mole percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.