INTUMESCENT FLEXIBLE POLYURETHANE FOAM

摘要

A method for producing a flexible polyurethane foam having reduced tendency to form burning embers, and which produces a char when it is ignited and burned, is provided by incorporating into the reaction mixture before foaming an aldehyde or an aldehyde generator, and preferably flexible polyurethane foam has increased flame retardance by also incorporating into the reaction mixture before foaming a flame retardant,