Importance

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Abstract

To provide a foaming additive for producing a polyurethane foam, which is capable of solving a problem of deterioration of moldability due to deterioration of the initial foaming property of a foam, and a method for producing a rigid polyurethane foam by using it.A foaming additive for producing a polyurethane foam, is used which comprises a salt of carbon dioxide with an amine compound of one or more types selected from the group consisting of an amine compound (I) represented by the following formula (1):which are independent of one another, is a hydrogen atom or a methyl group, and n is a number of at least 1, an amine compound (II) represented by the following formula (2):are not hydrogen atoms, each of n and m which are independent of each other, is an integer of from 1 to 5, and a is an integer of from 1 to 6, an amine compound (III) represented by the following formula (3):which are independent of one another, is a hydrogen atom or a methyl group, an amine compound (IV) represented by the following formula (4):which are independent of one another, is a hydrogen atom or a methyl group, and an amine compound (V) represented by the following formula (5):which are independent of one another, is a hydrogen atom or a methyl group.

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First Claim