Process for preparing self-skinned polyurethane foam

Abstract

Abstract CON ENTIONAL ANTIFOAMING AGENT EMPLOYED IN EXCESS OF PROPORTIO*S NORMALLY RECOMMENDED OR (B) A CONVENTIONAL POLYURETHANE FOAM SURFACTANT EMPLOYED IN LOWER PROPORTIONS THAN NORMALLY RECOMMENDED. THE NOVEL RESILIENT FOAMS ARE USEFUL IN ALL ENERGY-ABSORBING APPLICATIONS E.G. SAFETY PADDING IN AUTOMOBILES, TRUCKS AIRCRAFT ETC. AS WELL AS IN UPHOLSTERY, PACKAGING AND LIKE INDUSTRIES NOVEL RESILIENT CELLULAR POLYURETHANES, CHARACTERIZED BY INTEGRALLY FORMED TOUGH SKINS COMPLETELY SURROUNDING A CELLULAR CORE, ARE DISCLOSED. THESE SELF-SKINNED FLEXIBLE FOAMS ARE OBTAINED USING NOVEL FOAM MIXES SO FORMULATED THAT THE CELLS PROXIMATING THE SURFACE OF THE ADVANCING FOAM COLLAPSE ON CONTACT WITH ALIEN SURFACES SUCH AS MOLD WALLS, SUCH FOAM MIXES REQUIRE THE USE OF CONVENTIONAL POLYISOCYANATES AND POLYOLS, THE ABSENCE OF ADDED WATER, THE USE OF HALOGINATED ALIPHATIC HYDROCARBON BLOWING AGENTS AND, IN PLACE OF CONVENTIONAL SURFACTANT REQUIREMENTS, THE USE OF NO SURFACTANT OR THE USE OF A PERIPHERAL FOAM DESTABILISATION AGENT WHICH THE USE OF A PE-

Inventors

• 👤 H Nadeau
• 👤 R Stengard

Bibliographic Details