BigPatents India

This invention relates to novel polyisocyanate compositions, to a process for these polyisocyanate compositions, to a process for the production of cold cure flexible molded foams wheein this novel polyisocyanate composition comprises the polyisocyanate component, and to the cold cure flexible molded foams produced by this process. The novel polyisocynate compositions of the present invention are characterized by an NCO group content of more than about 15% (preferably fro`m about 20% to less than about 33% more preferably from about 25% to about 32%), and comprising: (1) from about 70 to 99% by weight of a polymethylene poly (phenyl isocyanate) having an NCO group content of from about 30 to about 33%, and a monomer content of from about 401% to about 90% by weight and (2) from about 1 to about 30% by weight of a prepolymer of diphenylmethane diisocyanate having an NCO group content of from about 2% to about 20% and comprising the reaction product of : (a) diphenylmethane diisocyanate; and (b) a polyether polyol. Drawing Sheets: NIL Total Pages: 40. Fig. Nil