Functionalised polybutadiene synthesis process
US11479618B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | May 23, 2019 |
| Grant date | Oct 25, 2022 |
| Priority date | — |
| Expiry date | Oct 12, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/36
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for preparing a functionalized polybutadiene is provided. The process comprises the following steps: The total molar amount of aluminium in the polymerization medium is such that the (aluminium/rare earth salt) molar ratio has a value between 1 and 5 and the polymerization is carried out at a temperature between 40° C. and 90° C.A functionalized polybutadiene that can be obtained by the process, and a rubber composition containing the functionalized polybutadiene is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.