Mitsui Toatsu Chemicals, Incorporated

Seiji Esaki

Tsukuru Izukawa

Masayuki Kimura

Takayoshi Masuda

Satoshi Ozaki

Haruhiko Kawakami

Toshio Nozawa

The present invention relates to a novel polyurethane resin, a foam prepared from the resin, a preparation process of the foam, and preparation process of a rigid polyurethane foam composite having a face material. The primary object of the present invention is to provide a rigid polyurethane foam and a rigid polyurethane foam composite fitted with a face material which are prepared by using a hydrochlorofluorocarbon foaming agent having very low public hazards such as ozone layer destruction and green house phenomenon of the earth. The above object can be achieved by using a combination of a polyether polyol initiated from a phenol resin with an alkanolamine or an aliphatic polyhydroxy compound in the production of rigid polyurethane foams. Foams thus obtained have equivalent properties to those of foams obtained by using chlorofluorocarbons (CFC) which are conventional foaming agents.

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Yokohama, Japan

Seiji Esaki