Soil-improving urea-formaldehyde foam - with alkali amidosulphonate incorporated into structure

摘要

Soil-improving agent based on a urea-formaldehyde foam having condensed in it an alkali (pref. Na) salt of amidosulphonic acid has the advantage of being readily wetted by water and has good water-absorption props. The amidosulphonic acid alkali-salt (pref. 0.004-0.04 mol. per mol. urea) is added during or after the condensation.