Mitsui Petrochemical Industries, Ltd.

Hiroo Wamura

Takashi Hayashi

Shunyo Uesugi

Toshihiro Sagane

Akira Mizuno

Shuji Minami

Hideaki Yamaguchi

This invention is to provide a novel process for the isomerization of a cycloolefin having an endo form to a cycloolefin having an exo form. The resulting isomer mixture has a novel composition, and a random copolymer produced from the above compositionally novel isomer mixture and ethylene has an excellent heat resistance and mechanical strength.

Isomerization of cycloolefin from endo-form to exo-form and

Disclosed herein is a process for the production of cycloolefin random copolymers comprising flash drying a solution of a cylcoolefin random copolymer in a hydrocarbon, said solution being obtained by copolymerization of ethylene and a specific cycloolefin in said hydrocarbon in the presence of a catalyst. Further proposed herein is a process for the production of cycloolefin random copolymers by copolymerization of ethylene with a specific cycloolefin of the in a hydrocarbon in the presence of a catalyst wherein said copolymerization is carried out in a polymerization reactor where a gas phase is not substantially present.

Process for producing cycloolefin random copolymers

Disclosed herein is a process for the production of cycloolefin random copolymers comprising flash drying a solution of a cylcoolefin random copolymer in a hydrocarbon, said solution being obtained by copolymerization of ethylene and a specific cycloolefin in said hydocarbon in the presence of a catalyst. Further proposed herein is a process for the production of cycloolefin random copolymers by copolymerization of ethylene with a specific cycloolefin of the in a hydrocarbon in the presence of a catalyst wherein said copolymerization is carried out in a polymerization reactor where a gas phase is not substantially present.

Disclosed herein is a process for the production of cycloolefin random copolymers comprising flash drying a solution of a cylcoolefin random copolymer in a hydrocarbon, said solution being obtained by copolymerization of ethylene and a specific cycloolefin in said hydrocarbon in the prsence of a catalyst. Further proposed herein is a process for the production of cycloolefin random copolymers by copolymerization of ethylene with a specific cycloolefin of the in a hydrocarbon in the presence of a catalyst wherein said copolymerization is carried out in a polymerization reactor where a gas phase is not substantially present.

Process for producing cycloolefin random copolymer

Disclosed herein is a process for the production of cycloolefin random copolymers comprising copolymerizing ethylene with at least one specific cyclooloefin in a liquid phase in the presence of a catalyst and a solvent in a polymerization vessel, wherein ethylene is copolymerized with the cycloolefin while feeding the cycloolefin or a mixture of the cycloolefin and the solvent onto inside circumferential wall of the polymerization vessel above the gas-liquid interface in the polymerization vessel. The proposed process ensures a smooth copolymerization reaction and a continuous and stable running of the apparatus for a prolonged period of time, and is productive of ethylene-cycloolefin random copolymers which have a uniform quaility and are excellent in heat resistance, heat aging property and various mechanical properties.

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Kuga, Japan

Hiroo Wamura