A simple and easy to use process for strengthening river embankments by means of dams or dikes with application of at least one polyurethane compact ensuring long term strengthening of the river bank, and presents no ecological problems

摘要

A process for strengthening river embankments by means of dams or dikes with application of at least one polyurethane compact to the mineral material on the embankment surface, involving the steps:(a) mixing a component with isocyanate groups with a component having groups reactive to isocyanates and (b) appliction of the free-flowing mixture from step (a) to the mineral material on the embankment surface is new. Independent claims are included for: (1) a compact hydrophobic polyurethane obtainable by reaction of:(i) polyisocyanates with (ii) compounds with at least two H atoms reactive to isocyanates where compounds (ii) contain at least one fat chemical (sic) polyol and at least one aromatic hydrocarbon resin modified by phenol; (2) a shaped compact polyurethane body and a mineral material where the polyurethane is a compact hydrophobic polyurethane; (3) river embankments, especially dams and dikes, where the stone surface is bonded to at least one compact polyurethane.