Ethylene-rich diene block polymer having a random block and a polyethylene block
US12428515B2 · kind B2 · utility
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Key dates
| Filing date | Jul 27, 2020 |
| Grant date | Sep 30, 2025 |
| Priority date | — |
| Expiry date | Sep 7, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2420/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A diblock polymer composed of a first block and a second block is provided. The first block is a statistical copolymer comprising units of a 1,3-diene and more than 50 mol % of ethylene units. The second block is a polyethylene with a melting point above 90° C. and a number-average molar mass greater than or equal to 2000 g/mol and less than or equal to 10 000 g/mol. Such a diblock polymer has improved rheology compared to a statistical copolymer of the same microstructure and of the same macrostructure as the first block of the diblock polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.