| http://www.w3.org/ns/prov#value | - In a final aspect, the present invention is a method for preparing a polyisocyanate blend useful for preparing flexible polyurethane foams comprising blending a PMDI and an MDI prepolymer wherein the prepolymer is prepared from a formulation including an active hydrogen containing compound having an average equivalent weight of from about 30 to about 600.
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