| 摘要 |
Dispersions containing a C14-C26 alcohol, an emulsifier, and a fatty acid ester of a polyhydric alcohol having at least 4 hydroxyl groups, the number of carbon atoms in the fatty acid being 14 or higher, show a marked synergistic action in defoaming and deaerating aqueous systems. Partial stearic acid esters of pentaerythritol, dipentaerythritol, or ditrimethylol propane are preferred fatty acid esters. The weight ratio of the alcohol to the ester is preferably 3.5:1 to 4.5:1. The dispersions have a wide field of use and are suitable e.g. for deaerating and defoaming aqueous systems in the paints, pulp, paper, foods and drilling industries, as well as for deaerating and defoaming transport water in the processing of sugar beet and potatoes, or waste water and sewage. |
