| 摘要 |
A flame-retardant integral-skinned polyurethane foam is prepared by a method which comprises the reaction of a polyol and an organic polyisocyanate in the presence of a foaming agent comprising trichlorofluoromethane, the improvement which comprises the incorporation of a catalyst comprising a phosphorous-containing compound selected from the group consisting of an alkyl phosphite, aryl phosphites and aryl-, alkyl-, aminoaryl-, alkaryl- and halide phosphines.
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