| 摘要 |
The invention relates to fatty alcohol-based oil-in-water emulsions and to the use thereof as defoamers or deaerators for aqueous compositions. Such oil-in-water emulsions consist at least 95 wt.% of the following components: a) 50 to 80 wt.%, in particular 55 to 75 wt.% and especially 60 to 70 wt.%, with respect to the total weight of the oil phase, of at least one alkanol with at least 16 C atoms, in particular with 16 to 20 C atoms, the proportion of alkanols with 16 to 18 C atoms being at least 80 wt.%, in particular 90 wt.%, especially 95 wt.% or at least 99%, with respect to the total weight of the component A, b) 1 to 10 wt.%, in particular 2 to 8 wt.%, especially 3 to 6 wt.%, with respect to the total weight of the oil phase, of at least one further component B, which is selected from esters of C12-C36-alkanecarboxylic acids with polyglycerine, esters of C12-C36-alkanecarboxylic acids with C12-C36-alkanols, and the mixtures thereof, and c) 10 to 49 wt.%, in particular 20 to 40 wt.%, especially 25 to 35 wt.%, with respect to the total weight of the oil phase, of at least one further component C, which is selected from organic substances that are liquid at 50 °C and at 1013 mbar, which have a boiling point above 200 °C at normal pressure, and which have a solubility in water of less than 0.1 g/l at 25 °C and at 1013 mbar.
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