Claims
- 1. A process for the production of cycloolefin random copolymers comprising copolymerizing ethylene with at least one cycloolefin of the general formula [I] noted below in a liquid phase in the presence of a catalyst and a hydrocarbon solvent in a polymerization vessel, wherein ethylene is copolymerized with the cycloolefin while feeding the liquid cycloolefin alone or a homogeneous solution of a mixture of the cycloolefin and the solvent onto the inside circumferential wall of the polymerization vessel above the gas-liquid interface in the polymerization vessel, ##STR84## wherein n is 0 or a positive integer, and R.sup.1 to R.sup.12 are the same or different, and each represents a hydrogen or halogen atom or a hydrocarbon group, or R.sup.9 (or R.sup.10) and R.sup.11 (or R.sup.12), when taken together, may form a mono- or poly-cyclic ring.
- 2. The process according to claim 1 wherein said cycloolefin or said mixture of the cycloolefin and the solvent is fed by spraying or pouring it onto inside circumferential wall of the polymerization vessel above the gas-liquid interface in the polymerization vessel.
- 3. The process according to claim 1 wherein said solvent is an aliphatic, alicyclic or aromatic hydrocarbon.
- 4. The process according to claim 1 wherein said catalyst comprised a vanadium compound soluble in said solvent and an organoaluminum compound.
- 5. The process according to claim 1 wherein said homogeneous solution of a mixture of the cycloolefin and the solvent comprises at least 5 wt % of the cycloolefin.
Priority Claims (1)
Number |
Date |
Country |
Kind |
63-223777 |
Sep 1988 |
JPX |
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Parent Case Info
This application is a continuation-in-part, of application Ser. No. 07/403,371 filed Sep. 6, 1989, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3738974 |
Takehisa et al. |
Jun 1973 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
0156464 |
Oct 1985 |
EPX |
0203799 |
Dec 1986 |
EPX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
403371 |
Sep 1989 |
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