Process for preparing flexible polyurethane foams
AssigneeImperial Chemical Industries PLC
InventorsLouis Muller, Gabriel Verhelst
Life of this patent
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Abstract
Process for preparing a flexible foam by reacting an isocyanate prepolymer having a free NCO content of 2-15% by weight, an isocyanate prepolymer having a free content of 25-31% by weight and an isocyanate-reactive composition comprising water.
Claims2
Polyisocyanate composition comprising 60-95% by weight of an isocyanate prepolymer having a free NCO content of from 2 to 15% by weight which prepolymer has been made from a polyoxyalkylene polyol which has an ethylene oxide content of up to 30% by weight and 5-40% by weight of another isocyanate prepolymer having a free NCO content of 25-31% by weight which prepolymer has been made from a polyoxyalkylene polyol which has an ethylene oxide content of at least 50% by weight, the % by weight of the first and the second prepolymer being calculated on the total weight of the first and the second prepolymer.
Dependencies are inferred from the claim text.