Abstract: Self-setting compositions are formed by bringing into admixture an organic polyisocyanate, a non-ionic surface active agent devoid of isocyanate-reactive groups, an alkaline filler and water. Preferred alkaline fillers are portland cement, calcium oxide and hydrated lime. A plasticizer is preferably incorporated in the composition. Waste material, for example liquid or particulate radioactive wastes may be formed into a self-setting composition for consolidation and disposal. A particulate extender may be incorporated in the self-setting composition to give a product useful for example as a floor screed or cavity filler.

Abstract: Aqueous emulsions comprising organic isocyanates, water and non-ionic surface active agents devoid of hydroxy, amino and carboxylic acid groups and the use of such emulsions for surface coatings. Use of aqueous emulsions of mixed methylene bridged polyphenyl polyisocyanates as bonding agents for the reconstitution of foam scrap.