Mitsui Petrochemical Industries, Ltd.

Shuji Minami

Toshihiro Sagane

Tatsuo Kinoshita

Hideaki Yamaguchi

Ryousuke Kaneshige

Masaaki Kawasaki

Kinya Mizui

Akira Mizuno

Hiroo Wamura

Masahide Tanaka

Hideshi Kawachi

Shigemi Shiraki

Junichi Yoshitake

Tokinori Agou

Masayuki Okabe

Hiroaki Kitani

Andrzej Rokicki

Kenji Wakatsuru

Hitomi Matsuzaki

Beatrice K Stein

Toshiaki Kuroiwa

Ryosuke Tomita

John N Armor

Takami Nishikawa

Takamasa Tsumoto

Takehiko Kawate

Shigeru Kanzaki

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

In accordance with the present invention, there are provided cycloolefin random copolymers composed of ethylene and cycloolefin and containing substantially no polyethylene, and processes for preparing the same. Optical disc substrates prepared from the above-mentioned copolymers are excellent in transparency and also capable of minimizing the occurence of errors in reading of the discs due to quality of the substrates used therefor.

Cycloolefin random copolymer and process for preparing same

Hot-melt adhesive

A process for the production of a cycloolefin-based random copolymer, which comprises:

Process for the production of cycloolefin-based random copolymer

Copolymerization of ethylene and cycloolefin isomerized from endo-form

There is provided a liquid oxidatively modified ethylenic random copolymer, which is an oxidatively modified product of a liquid ethylenic random coplymer comprising 20 to 80 mol % of ethylene and 80 to 20 mol % of .alpha.-olefin, and has (i) a number average molecular weight (Mn) in the range of from 200 to 10,000, (ii) a molecular weight distribution (Mw/Mn) given as weight average molecular weight (Mw) divided by number average molecular weight (Mn) in the range of up to 4, and (iii) an oxygen content of from 0.1 to 20% by weight, an acid value of from 0.1 to 50, and a saponification value of from 0.1 to 100. It is prepared by contacting a corresponding ethylenic random copolymer with oxygen-containing gas at 100.degree.-250.degree. C.

Liquid oxidatively modified ethylenic random copolymer, process of

According to the present invention, a zinc-containing solid catalyst prepared by contacting zinc oxide with an organic dicarboxylic acid in the presence of or in the absence of an organic solvent under a mechanical pulverization treatment is provided. The catalyst is in a good pulverized state and exhibits a high catalytic activity for polymerization of carbon dioxide with an epoxide to obtain a polyalkylene carbonate.

Zinc-containing solid catalyst, process of preparing same and process

A reflection-preventive layer composed of a specific polyfluoro(meth)acrylate is formed on one or both of the surfaces of a transparent film of a cellulose derivative. In this reflection-preventive pellicle film, the minimum light transmission in wavelengths of 350 to 450 nm is improved and the average light transmission is improved, and the adhesion of the reflection-preventive layer to the cellulose derivative layer is excellent.

Reflection-preventive pellicle film

An external agent for application to the skin, such as a cosmetic, an ointment or a hair remover, comprises a liquid low-molecular-weight ethylenic copolymer having an ethylene content of 30 to 70 mole %, a number average molecular weight of 150 to 5,000, a Q value, as defined in the specification, of not more than 4, a standard deviation, as defined in the specification, of not more than 3, and a B value, as defined in the specification, of 1.0 to 1.5.

External agent for the skin comprising a specific ethylenic copolymer

There is provided a liquid oxidatively modified ethylenic random copolymer, which is an oxidatively modified product of a liquid ethylenic random copolymer comprising 20 to 80 mol % of ethylene and 80 to 20 mol % of .alpha.-olefin, and has (i) a number average molecular weight (Mn) in the range of from 200 to 10,000, (ii) a molecular weight distribution (Mw/Mn) given as weight average molecular weight (Mw) divided by number average molecular weight (Mn) in the range of up to 4, and (iii) an oxygen content of from 0.1 to 20% by weight, an acid value of from 0.1 to 50, and a saponification value of from 0.1 to 100. It is prepared by contacting a corresponding ethylenic random copolymer with oxygen-containing gas at 100.degree.-250.degree. C.

Liquid polymer composition and use thereof

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Yamaguchi, Japan

Shuji Minami