| 摘要 |
PROBLEM TO BE SOLVED: To obtain good foam-durability over a long period by incorporating component A of at least one of a compound of a specified formula and a compound of another specified formula and component B of a compound given by a specified formula as indispensable components. SOLUTION: A blowing agent for concrete contains components A, B as indispensable components. The component A is at least one of a compound given by formula I and a compound given by formula II. In the formula I, R<1> is an 8-20C aliphatic hydrocarbon group, a phenyl group having a 4-12C alkyl group or a phenyl group having an allyl group; X is a hydrogen or methyl group; M is an alkali metal, an alkaline earth metal, ammonium, an alkylamine or an alkanolamine; n is an integer of 0-20. In the formula II, R<2> is an 8-20C aliphatic hydrocarbon group. X, M and n are the same with those in the formula I. The component B is a compound given by formula III. In the formula III, R<3> is an 8-20C hydrocarbon group; X is a hydrogen or methyl group; n is an integer of up to 5. |
