| abstract |
The invention relates to a water-dispersible polyisocyanate preparation having an (average) NCO functionality of 2 to 3.5 which, in addition to an aliphatic polyisocyanate or a mixture of aliphatic polyisocyanates, comprises an amount of a reaction product of an aliphatic polyisocyanate or one which ensures the dispersibility of the preparation in water Mixture of aliphatic polyisocyanates with a mono- or polyvalent, nonionic polyalkylene ether alcohol with at least one, at least 10, ethylene oxide units containing polyether chain as emulsifier; as well as the use of this polyisocyanate preparation as an additive for improving the adhesive properties for aqueous adhesives based on polymers dispersed in water. |