Sanyo Chemical Industries, Ltd.

Keiichi Akimoto

Masahiro Matsuoka

Takeshi Sumita

Tsuyoshi Tomosada

Isao Ishikawa

Polymer/polyol compositions, obtained by polymerizing an ethylenically unsaturated monomer in situ in a polyol in the presence of inner-olefin containing at least 5 carbon atoms, are of lower viscosity and can provide polyurethanes having improved properties. Polymer/polyol compositions, obtained by polymerizing an ethylenically unsaturated monomer, in situ in a polyol in the presence of an azo compound and a peroxide having a 10 hours half-life period temperature which is lower by at least 10.degree. C. than that of the azo compound, have improved stability even at higher styrene content.

Polymer/polyol composition, processes for making the same and

Polymer/polyol compositions, obtained by polymerizing, in situ in a polyol, one or more ethylenically unsaturated monomers comprising an alpha-olefin containing at least 5 carbon atoms and/or an acrylate or methacrylate ester of an alcohol containing at least 9 carbon atoms, which are of relatively low viscosity and which afford polyurethanes having improved properties.

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Osaka, Japan

Keiichi Akimoto