| 摘要 |
<p>The agents comprise aq. solns. of a mixt. of alkali metal soaps of 8-10C and 16-22C fatty acids, with a wt. ratio of 8-10C to 16-22C acids of 0.5-3:1. The compsns. avoid the use of petroleum prods. The soln. pref. contains 1-5 wt.% soap and has a pH of 7.5-9. It can also contain 0.5-2 wt.% of an anionic or nonionic surfactant (esp. a mixt. of a nonionic ethoxylation prod. and an anionic phosphate ester). and 0.1-0.5wt.% of EDTA. The agents can be applied to the forms, shuttering, etc., by brushing or spraying.</p> |
