Method for producing functionalized cis-1,4-polydienes having high cis-1,4-linkage content and high functionality
US8017695B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Dec 27, 2007 |
| Grant date | Sep 13, 2011 |
| Priority date | — |
| Expiry date | Jan 18, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T152/10495
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
This invention relates to a method for producing functionalized cis-1,4-polydienes having a combination of a high cis-1,4-linkage content and a high functionality, the resulting polymers and the vulcanized products containing the polymers. The functionalized cis-1,4-polydienes of the present invention are produced by a method comprising the steps of: (1) preparing a reactive polymer by polymerizing conjugated diene monomer with a lanthanide-based catalyst in the presence of less than 20% by weight of organic solvent based on the total weight of monomer, organic solvent, and resulting polymer, where the lanthanide-based catalyst is the combination of or reaction product of (a) a lanthanide compound, (b) an aluminoxane, (c) an organoaluminum compound other than an aluminoxane, and (d) a halogen-containing compound; and (2) contacting the reactive polymer with a functionalizing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.