Process for reducing flammability of polyurethane foams

Abstract

Abstract THIS INVENTION RELATES TO THE USE OF MODIFIED SILOXANEPOLYOXYALKYLENE BLOCK COPOLYMER FOAM STABILIZERS IN THE PRODUCTION OF OPEN-CELL FLEXIBLE POLYETHER POLYURETHANE FOAM HAVING REDUCED FLAMMABILITY. THE BLOCK COPOLYMERS ARE MODIFIED WITH CERTAIN SILICON-BONDED ORGANIC GROUPS (E.G., C6H5CH2CH2-OR BICYCLOHEPTY GROUPS) WHICH INCREASE THE BULK SURFACE TENSION OF THE BLOCK COPOLYMERS. OPEN-CELL FLEXIBLE POLYETHER POLYURETHANE FOAMS ARE PRODUCED COMMERCIALLY FROM REACTION MIXTURES CONTAINING POLYURETHANE-FORMING REACTANTS, A CATALYST FOR THE REACTION OF THE POLYURETHANE-FORMING REACTANTS TO PRODUCE THE POLYURETHANE, A BLOWING AGENT AND A SILOXANE-POLYOXYALKYLENE BLOCK COPOLYMER FOAM STABILZER. SUCH FOAMS ARE, TO SOME EXTENT, FLAMMABLE AND ARE USED IN APPLICATIONS (E.B., AUTOMOBILE SEAT CUSHIONS AND HOUSEHOLD FURNITURE CUSHIONS) WHERE FIRE CREATES A HAZARD. ACCORDINGLY, IT IS DESIRABLE TO REDUCE THE FLAMMABILITY OF SUCH FOAMS.

Inventors

• 👤 E Morehouse

Bibliographic Details