aqueous polyurethane dispersions with reduced content of triethylamin

摘要

Surprisingly, N,N-diisopropyl-N-ethylamine (I) can be used as a partial replacement for the ecologically less desirable triethylamine in the neutralization of aqueous dispersions. An aqueous dispersion containing salt-like groups, which contain 0.05-5% (relative to the total weight of aqueous dispersion) of I in the protonated or neutral form, and 0-1.5% of tertiary amine is new. An Independent claim is included for: preparation of an aqueous dispersion containing a polyurethane prepolymer by dispersion of an acid group containing polyurethane prepolymer with (I) in the neutralized form.