Catalytic system for conjugated diene polymerisation, polymerisation method and functional polymer obtained
US9315590B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 10, 2012 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Dec 10, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F236/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a novel catalytic system for polymerization, and more particularly for preparing conjugated diene polymers bearing a polar function at the chain end. This catalytic system is based on a metal salt of a rare-earth metal and, as alkylating agent, an organometallic compound based on a metal belonging to the 2nd column or the 13th column of the Periodic Table, capable of transferring a polar function to the diene elastomer during the conjugated diene polymerization step. The novel catalytic system makes it possible to reduce the steps for synthesizing a chain-end functionalized elastomer, while ensuring optimal functionalization, advantageously close or equal to 100%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.