CATALYST SYSTEM FOR ADHERENT RIGID FOAM

摘要

A thermosetting unsaturated polyester-polyurethane hybrid foam resin composition is made without significant blistering by using a 2-component catalyst system - one which initiates at room temperature and one which initiates at a temperature of at least 75.degree.C and has a one-hour half-life temperature of at least 90.degree.C; the composition has a room temperature stability of at least thirty days.