Sumitomo Chemical Company, Limited

Shunsuke Matsushima

Shuichi Kanagawa

Kentaro Mashita

Kunimasa Kamio

Kazuhiko Hata

Shinji Nakao

Kiyoshi Nakai

Kiyoshi Kawai

m-Isopropenylphenol oligomer which is useful for the production of synthetic resins such as epoxy resins is produced by polyermizing m-isopropenylphenol at a temperature of 135.degree. to 230.degree. C. using a catalytic amount of an acid catalyst in the presence or absence of a solvent, or freezing m-isopropenylphenol in the presence or absence of an acid catalyst.

Oligomerization of m-isopropenylphenol

An oligomer of m-isopropenylphenol is produced by subjecting m-isopropenylphenol to thermal polymerization in the absence of a catalyst.

Oligomer of m-isopropenylphenol

m-Isopropenylphenol oligomer which is useful for the production of synthetic resins such as epoxy resins is produced by polymerizing m-isopropenylphenol at a temperature of 135.degree. to 230.degree. C. using a catalytic amount of an acid catalyst in the presence or absence of a solvent, or freezing m-isopropenylphenol in the presence or absence of an acid catalyst.

An epoxy resin of the formulae (I) and/or (II), ##STR1## wherein R and R' are each hydrogen atom or an alkyl group having 1 to 3 carbon atoms and n is a mean value satisfying the equation, 0&lt;n.ltoreq.2, which is excellent in heat resistance, flexibility, curability and the like, and is useful in paints, adhesives, civil engineering and construction industry, electric appliances and the like.

Epoxy resins and process for producing the same

A process for producing poly-.alpha.-olefin short fibers, which is characterized by further increasing the pressure of a solution system comprising a fiber-forming crystalline poly-.alpha.-olefin and a solvent and existing in the form of a solution mixture of two liquid phases at an elevated temperature and pressure, and immediately thereafter ejecting the solution system under pressure through a nozzle or orifice.

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Otsu, Japan

Shunsuke Matsushima