Oil based aqueous polyurethane dispersions

摘要

A two-pack coating composition comprising curing agents selected from the group consisting of non-blocked polyfunctional isocyanates I, polyaziridines Z , and carbodiimides Y , and an aqueously dispersed polyurethane U wherein the polyurethane U comprises building blocks derived from hydroxyl group containing unsaturated fatty acids B21 , a process for the production of the polyurethane U, and a method of use thereof in combination with the said curing agents in preparing coating compositions which are particularly useful for wood