ETHYLENE-CYCLOOLEFIN RANDOM COPOLYMER AND ITS PRODUCTION

Title:

ETHYLENE-CYCLOOLEFIN RANDOM COPOLYMER AND ITS PRODUCTION

Document Type and Number:

Japanese Patent JPH04189806

Kind Code:

A

Abstract:

PURPOSE:To obtain the subject copolymer having excellent transparency, heat- resistance, dimensional stability and rigidity and useful as an optical material, etc., by copolymerizing ethylene with a specific cycloolefin in a solvent in the presence of a catalyst composed of a soluble V compound and a halogen- containing organic Al compound. CONSTITUTION:The objective copolymer containing the constituent units of formula II and formula III at a molar ratio (II/III) of 90/10 to 10/90 and having an intrinsic viscosity [eta] of 0.5-15dl/g measured in decalin at 135 deg.C can be produced by copolymerizing ethylene with a cycloolefin of formula I (R<1> to R<3> are H or 1-6C alkyl; n is 0, 1 or 2) (e.g. 8-ethylidenetetracyclo[4,4,0,1<2>,<5>,1<7>,<10>]-3- dodecene) in a hydrocarbon solvent in the presence of a catalyst composed of a halogen-containing organic aluminum compound and a vanadium compound soluble in the hydrocarbon.

Inventors:

FUTAMURA HITOSHI
GOTO SHIRO

Application Number:

JP31784890A

Publication Date:

July 08, 1992

Filing Date:

November 26, 1990

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Assignee:

MITSUBISHI PETROCHEMICAL CO

International Classes:

C08F210/02; C08F4/60; C08F4/68; C08F10/14; C08F32/00; C08F232/08; (IPC1-7): C08F4/68; C08F210/02; C08F232/08

Attorney, Agent or Firm:

Mitsuteru Soga (4 outside)

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