Process for hydrogenating conjugated diene polymers
US6040390A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1998 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Jul 20, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08C19/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a process for hydrogenating selectively the unsaturated double bonds of copolymer having the double bonds of conjugated diene unit, which has been widely used as a modifier of transparent impact-resistant resin or polyolefin, and polystyrene resin. According to this invention, the copolymer is saturated via hydrogenation in the presence of a novel homogeneous system organotitanium catalyst without a separate reducing agent, thus representing an extremely high hydrogenation yield with remarkable hydrogenation reproducibility. Hence, a compound represented by the following formula I is employed as an appropriate catalyst. Formula I ##STR1## Wherein Cp is a cyclopentadienyl (C.sub.5 H.sub.5) group; R.sub.1, R.sub.2 and R.sub.3 are hydrogen atom or alkyl group of 1 to 3 carbon atoms; and PA2 R.sub.1, R.sub.2 and R.sub.3 can be the same or different.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.