Terpolymers of ethylene,higher alpha-olefins and cycloalkadienonorbornenes
Abstract
Abstract Copolymers of a cycloalkadienonorbornene and, optionally dicyclopentadiene with ethylene and an aliphatic alpha olefin of the general formula R-CH = CH2, where R is a C1 to C6 alkyl group are made by copolymerizing a mixture of the monomers in the presence of a halogen-containing catalyst obtained from a vanadium compound and beryllium or aluminium organometallic compounds. The Specification contains long lists of suitable catalyst components. The preferred norbornene is 5,6-cyclododecadieno - 41,81 - norbornene - 2, and the alpha-olefin, propylene and/or butene-1. The catalyst preparation and the copolymerization are preferably effected between 0 DEG and - 80 DEG C. The copolymerization may be carried out in bulk, or in a hydrocarbon or halogenated hydrocarbon solvent. The copolymers, soluble in boiling n-heptane, are recovered by conventional low-pressure techniques. The copolymers may be sulphur vulcanized and are then insoluble in organic solvents.
Inventors
- 👤 Guido Sartori
- 👤 Nazzareno Cameli
- 👤 Alberto Valvassori
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
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