Catalytic systems made of a complex of rare earths for stereospecific polymerisation of conjugated dienes
US8946368B2 · kind B2 · utility
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23Claims
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Key dates
| Filing date | Apr 27, 2010 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Jan 3, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F36/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a multi-component catalytic system that can be used for the cis-1,4 stereospecific polymerization of conjugated dienes. The system is based on: in which the R groups each denote hydrogen, an alkyl radical optionally comprising one or more heteroatoms (N, O, P, S, Si) or one or more halogen atoms, a halogen atom, a group based on one or more heteroatoms (N, O, P, S, Si); x and y are integers from 0 to 6; D is a group having a chemical function, one of the atoms of which has a non-bonding pair; L being an atom from column 1 of the Periodic Table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.