Telechelic alkadiene polymers with crosslinkable end groups and methods for making the same
US6465590B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1999 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Mar 17, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L53/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to telechelic polymers having crosslinkable end groups of the formula and methods for preparing the same wherein n is an integer; is an alkadienyl group; Y is an alkyl group; and Z is crosslinkable end group. In general, the inventive synthesis involves reacting a functionalized chain transfer agent having crosslinkable ends with a cycloalkene in the presence of a ruthenium or osmium catalyst of the formula wherein:M is ruthenium or osmium;X and X1 are independently any anionic ligand;L and L1 are any neutral electron donor ligand;R and R1 are each hydrogen or a substituted or unsubstituted substituent wherein the substituent is 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. In another aspect of the invention, methods for controlling the molecular weight of the resulting telechelic polymer are also presented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.