Copolymer dispersions in polyfunctional compounds having a plurality of active hydrogens, method of making the copolymer dispersions, and a polyurethane composition prepared therefrom.

摘要

A stable copolymer dispersion is prepared by addition copolymerization of (1) an adduct of an active hydrogen compound, for example, a polyether polyol, and an active ethylenically unsaturated isocyanate, for example, 2-isocyanatoethyl methacrylate with (2) ethylenically unsaturated monomer(s), for example, styrene or mixture thereof with acrylonitrile, while (1) and (2) are dispersed or dissolved in an excess of an active hydrogen polyfunctional compound. The resulting dispersion has a controlled particle size and a viscosity such that it is suitably employed in the production of polyurethane foams.