Olefin hydrogenation catalyst, process for hydrogenating polymers with the catalyst, and hydrogenated block copolymers produced by said processes
US4673714A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1985 |
| Grant date | Jun 16, 1987 |
| Priority date | — |
| Expiry date | Apr 10, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/46
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An olefin hydrogenation catalyst containing as an essential component a compound represented by the formula: ##STR1## The catalyst is capable of selectively hydrogenating the unsaturated double bonds of the diene units of a conjugated diene polymer or copolymer having a number average molecular weight of 500 to 1,000,000, particularly a styrenebutadiene block copolymer comprising at least one polymer block A composed mainly of styrene and at least one polymer block B composed mainly of 1,3-butadiene and/or isoprene. The hydrogenated block copolymer obtained from such selective hydrogenation is useful as an elastomer, a thermoplastic elastomer or a thermoplastic resin having excellent weather resistance and oxidation resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.