Copolymer of ethylene and a 1,3-diene
US11718692B2 · kind B2 · utility
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Key dates
| Filing date | Mar 18, 2019 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Mar 18, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L23/083
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A copolymer of ethylene and of a 1,3-diene of formula CH2═CR—CH═CH2 is provided. The ethylene units represent between 50 mol % and 95 mol % of the ethylene units and of the units of the 1,3-diene, and the units of the 1,3-diene of 1,2 and 3,4 configuration represent more than 50 mol % of the units of the 1,3-diene. The symbol R represents a hydrocarbon chain having from 3 to 20 carbon atoms. Such a copolymer exhibits an improved compromise between the degree of crystallinity and the stiffness and makes it possible to widen the field of application of ethylene-rich diene copolymers in rubber compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.