Polyolefin compositions having enhanced ultraviolet and oxidative resistance and methods for their production and use
US6583236B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2000 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | Feb 4, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F15/0046
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention discloses a method for dispersing a metathesis catalyst in an olefin to produce a catalyst-monomer mixture having a desired catalyst:monomer ratio comprising dispersing the catalyst within a solvent and mixing the dispersed catalyst with an olefin monomer. In preferred embodiments, the catalyst is of the formula wherein M is ruthenium or osmium; X and X1 are either the same or different and are any anionic ligand; L and L1 are either the same or different and are neutral electron donor; R and R1 are either the same or different and are each independently hydrogen or a substituent selected from the group consisting of C1-C20 alkyl, C2-C20 alkenyl, C2-C20 alkynyl, aryl, C1-C20 carboxylate, C1-C20 alkoxy, C2-C20 alkenyloxy, C2-C20 alkynyloxy, aryloxy, C2-C20 alkoxycarbonyl, C1-C20 alkylthio, C1-C20 alkylsulfonyl and C1-C20 alkylsulfinyl, wherein each of the substituents is substituted or unsubstituted. Preferably, the olefin monomer is dicyclopentadiene and the solvent is soybean oil or mineral oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.