| 摘要 |
<p>AGENTS FOR DEFOAMING AND DEAERATING AQUEOUS SYSTEMS AND THE USE THEREOF Agents for defoaming and deaerating aqueous systems based on dispersions containing C14-C26 alcohols, per se known emulsifiers and fatty acid esters of polyhydric alcohols, having at least 4 hydroxyl groups,the number of carbon atoms in the fatty acid or acids being 14 or higher. The inventive mixture of fatty alcohols and fatty acid esters has a marked synergistic action in defoaming and deaeraating aqueous systems. Partial fatty acid esters have proved particularly advantageous as fatty acid esters. The weight ratio of the alcohols to the esters is 2:1 to 10:1 and preferably 3.5:1 to 4.5:1. The average particle size of the dispersed, water-insoluble substances is 1 to 6 and preferably 2 to 3 .mu.m. The agents according to the invention are universally usable 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.</p> |
