Polymerisation of cyclooctene
US3939136A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1974 |
| Grant date | Feb 17, 1976 |
| Priority date | — |
| Expiry date | Jul 2, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G61/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyoctenamers, in which more than 80% of the C=C-double bonds are in the cis-configuration, with a second order transition temperature of approximately -90.degree.C, a crystallisation temperature of from -30.degree. to +10.degree.C and a melting point of +10 to +40.degree.C and a process for its production, wherein cyclooctene and, optionally, up to 20% by weight, based on the monomer total, of another cyclic olefin are polymerised in an inert organic solvent at temperatures of from -50.degree. to +10.degree.C in the presence of a catalyst of PA0 A. a tungsten halide or oxyhalide, PA0 B. an alcohol or a halogen substituted alcohol, PA0 C. an organometallic compound of aluminium, and PA0 D. boron trifluoride or boron trifluoride etherate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.