PROCESS FOR THE PREPARATION FO POLYURETHANE FOAMS

摘要

A process for the preparation of a visco-elastic foam having a density from 50 to 100 kg/m<3> involving reacting an isocyanate component having a functionality from 2.1 to 2.7 of general formula (I): wherein PHI represents a phenyl group and n is an integer greater than or equal to 1 with a polyol component comprising 80 to 100 % by weight of a bifunctional polyol polyether having an average molecular weight from 1000 to 4000, 0 to 5 % by weight of a monofunctional alcohol, 0 to 20 % by weight of a polyol having a functionality equal to or greater than three and an average molecular weight from 92 to 4000.