Aqueous dispersions

摘要

A nonionic dispersing agent suitable for use in the production of aqueous polyurethane dispersions, said agent having the formula: wherein R1 represents a monovalent hydrocarbon radical containing 1-12 carbon atoms; R2 represents hydrogen or a mixture thereof with methyl and/or ethyl, at least 40% of the R2 substituents in said mixture being hydrogen; R3 represents an isocyanate-reactive organic radical; R4 represents H or an isocyanate-reactive organic radical; Z represents an alkylene radical containing 2-4 carbon atoms; m is an integer from 5 to 150, and n is 0 or 1.