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Assignee501 Nippon Polyurethane Industry, Co. Ltd.
InventorsKensuke Tani, Takaaki Arii
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A method for producing a flexible polyurethane foam by the reaction of a mixture of an active hydrogen compound, a blowing agent, and an additive with an organic polyisocyanate, where water is used for generating carbon dioxide as the blowing agent; and the organic polyisocyanate is a mixture of (a) an isocyanate-terminated prepolymer prepared by reacting, with diphenylmethane diisocyanate, one or more of alkylene-polyols constituted of ethylene oxide units and an alkylene oxide units of three or more carbon atoms in an addition-polymerization molar-ratio of from 40/60 to 0/100, having an average functionality of three or more, and having an average molecular weight of from 9000 to 30000, and (b) a polyphenylmethane-polyisocyanate, in a mixing ratio of (a) to (b) in the range of from 20/80 to 80/20 by weight.
An improved low density, flexible polyurethane foam produced from the reaction of a mixture of an active hydrogen compound, an organic polyisocyanate, an additive, and water, wherein the improvement comprises the use of water for generating carbon dioxide as a blowing agent substantially in the absence of other blowing agents, and wherein the organic polyisocyanate is a mixture of
An improved method for producing a low density, flexible polyurethane foam by the reaction of a mixture of an active hydrogen compound, an organic polyisocyanate, an additive, and water, wherein the improvement comprises using water for generating carbon dioxide as a blowing agent, substantially in the absence of other blowing agents, and wherein the organic polyisocyanate is a mixture of
Dependencies are inferred from the claim text.