| 摘要 |
<p>The complexing agent may be a chelating agent, e.g. condensed phosphates obtainable by heating orthophosphates or aminopolycarboxylic acids. The softening agent may be sulphonated oil or fat, acid amides or urea derivs., silicon compounds, polymerised unsats. or polyurethanes. The combined softener does not make dirt retention worse, particularly oily or fatty dirts.</p> |
