PRESSURIZED, ISOCYANATE-TERMINATED PREPOLYMERS CONTAINING OXAZOLIDONE AND URETHANE GROUPS FOR ONE-COMPONENT FOAMS

摘要

A pressurized, blowing agent-containing, isocyanate-terminated prepolymer containing oxazolidone and urethane groups can be prepared by reacting an isocyanate component with a polyol component, wherein the isocyanate component (A) used is a reaction product containing terminal isocyanate groups and obtained by reacting at least one isocyanate containing at least two isocyanate groups in the molecule with a mixture of at least one compound containing at least two functional groups which react with isocyanate and at least one epoxide group in the molecule and a polyester polyol and the polyol component (B) used comprises at least one polyether terminated by primary hydroxyl groups and having a functionality of ~2.