Processes for improving linking efficiencies in the synthesis of star polymers
US6107408A · kind A · utility
7Cited by
5References
27Claims
0Family size
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Key dates
| Filing date | Feb 26, 1998 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Feb 26, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F236/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Processes for the synthesis of star or multi-branched polymers and the resultant polymers. One or more alkadiene monomers are polymerized in the presence of suitable organometallic initiators and subsequently coupled to form star polymers. Prior to coupling, one or more alkenylsubstituted aromatic hydrocarbons are incorporated at the living ends of the polydienyl anions to provide increased linking efficiencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.