| 摘要 |
Agents which contain (a) an ester of aliphatic carboxylic acids and aliphatic alcohols having a boiling point of at least 150 DEG C. and -based on (a -b) 0.5-10% by weight of an amide of the formula <IMAGE> (I) in which R stands for C10-C22-alkyl or -alkenyl, R' stands for H or C1-C4-alkyl, or the two R' together stand for an ethylene bridge, and R'' stands for the radicals <IMAGE> or -CH2-O-CH2-, wherein R''' stands for H, C1-C6-alkyl or phenyl, and (c) 1-30% by weight of a non-ionic surfactant are used for removing foam, for preventing foam formation and for deaerating aqueous systems.
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