Propylene-olefin copolymers and methods for making the same
US10633527B2 · kind B2 · utility
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Key dates
| Filing date | Jul 17, 2017 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Jan 8, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided is a composition having 70 wt % to 90 wt % of a first propylene-olefin copolymer component having an ethylene content of 15 to 21 wt %; and 10 wt % to 30 wt % of a second propylene-olefin copolymer component having an ethylene content of 6 to 10 wt %; wherein the weight average molecular weight of the first component is 250,000 to 1,780,000 g/mol higher than the weight average molecular weight of the second component; wherein the reactivity ratio product of the first component is less than 0.75; wherein the reactivity ratio product of the second component is greater than or equal to 0.75.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.