Process for the manufacture of polyurethane foam by controlling the rate of heat generation

Abstract

Abstract A process for the manufacture of a polyurethane foam which comprises forming a reaction mixture containing an organic polyisocyanate, an organic polyol and an inert blowing agent having a boiling point not exceeding 50*C. at atmospheric pressure under such a pressure that the blowing agent is substantially in condensed form and releasing the pressure on said reaction mixture whereby it expands to form a froth which subsequently cures to form a foam, the reaction mixture having been brought to such a temperature, either before or during the release of pressure, that the rate of generation of reaction heat in said froth during the curing period is substantially equal to the rate at which heat is dissipated from the froth to its surroundings.

Inventors

• 👤 O Bengtson

Bibliographic Details