Ethylene-propylene copolymeric compositions with long methylene sequence lengths
US9657122B2 · kind B2 · utility
4Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2014 |
| Grant date | May 23, 2017 |
| Priority date | — |
| Expiry date | Jul 16, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2420/09
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to methods to prepare and compositions pertaining to branched ethylene-propylene copolymers that include at least 50% ethylene content by weight as determined by FTIR; a g′vis of less than 0.95; a Mw of 125,000 to 300,000; a methylene sequence length of 6 or greater as determined by 13C NMR, wherein the percentage of sequences of the length of 6 or greater is more than 32%; and can have greater than 50% vinyl chain end functionality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.