Patent ID: 7678840

Claim:
A reactive system suitable for the production of a polyurethane foam which exhibits decreased isocyanate emissions, and comprises: (A) a polyisocyanate component comprising a polymethylene poly(phenylisocyanate) having a polymeric isocyanate component content of greater than 70% by weight and a monomeric isocyanate component present in an amount of less than 30% by weight, with the sum of polymeric and monomeric totaling 100% by weight of the polymethylene poly(phenylisocyanate), wherein the monomeric isocyanate component is comprised of less than or equal to about 25% by weight of the 4,4′-isomer of diphenylmethane diisocyanate, less than or equal to about 5% by weight of the 2,4′-isomer of diphenylmethane diisocyanate and less than or equal to 2% of the 2,2′-isomer of diphenylmethane diisocyanate, with the sum of the 2,2′-isomer, the 2,4′-isomer and the 4,4′-isomer totaling the less than 30% by weight monomeric isocyanate based on 100% by weight of said polymethylene poly(phenylisocyanate); with (B) an isocyanate-reactive component; in the presence of (C) at least one catalyst and (D) water, wherein the isocyanate-index is less than 100.