| 摘要 |
The invention relates to a process for preparing cold-hardening foams containing urethane groups using as an emulsifier, sulphonamide compounds of the formula: <IMAGE> wherein R represents an alkyl, chloroalkyl, cycloalkyl radical having from 8 to 30 carbon atoms, or an alkaryl radical having from 10 to 30 carbon atoms, R1 and R2, which may be the same or different, each represent a hydrogen atom, a chloromethyl, methyl, ethyl or phenyl radical, M IS AN INTEGER OF FROM 0 TO 50, R3 represents a hydrogen atom, an alkyl, aralkyl, alkaryl, aryl radical or a -(CHR1-CHR2-O-)mR4- group and R4 represents a hydrogen atom, an alkyl, aralkyl, acyl, carbamoyl or cyanalkyl radical having from 1 to 20 carbon atoms.
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