POLYOL AND UTILIZATION THEREOF

摘要

A b s t r a c t The present invention relates to a polyol, polyurethane resin, rigid polyurethane foam, preparation process thereof and a preparation process of a rigid polyurethane foam composite. The polyol used in the present invention comprises a phenol resin base polyol mixed with an aminophenol base polyol or a polyphenylpolyxylylenepolyamine base polyol or a polymethylenepolyphenylpolyamine base polyol. The above polyurethane resin, foam and composite have resistance to dissolution in a hydrochlorofluorocarbons and a hydrofluorocarbons which are foaming agents having very low public hagard. The above-mentioned foams have excellent physical properties equivalent to those of conventional polyurethane foams obtained by using chlorofluorocarbons, and hence are very useful as a thermal insulation material or a thermal insulation structure for refrigerators, freezers, insulation panels, ships or vehicles.