Method of producing flexible reticulated polyether polyurethane foams
AssigneeBridgestone Tire Company Limited
InventorsToshio Yukuta, Kazuo Yagura, Nobuhisa Fuchigami
Life of this patent
Estimating the term…
Abstract
A method of producing flexible polyether polyurethane foams, which have a substantially skeletal reticulated structure, is disclosed. When the flexible foam is produced by reacting a polyhydroxyl compound with an organic polyisocyanate in the presence of a blowing agent by one-shot process, a catalyst and other additives, a mixture of (a) poly(oxyethylene-oxypropylene)polyether polyol containing 51 to 98% by weight of ethylene oxide component and (b) poly(oxyethylene-oxypropylene)polyether polyol containing not less than 51% by weight of propylene oxide component is used as the polyhydroxyl compound.
Claims7
A method for producing a flexible polyether polyurethane foam by reacting a polyhydroxyl compound with an organic polyisocyanate in the presence of a catalyst, a blowing agent, a surfactant and other additives by a one-shot process, characterized in that as said polyhydroxyl compound there is used a mixture of (a) 50-90 parts by weight of poly(oxyethylene-oxypropylene)polyether polyol containing 51 to 90% by weight of ethylene oxide component and (b) 10-50 parts by weight of poly(oxyethylene-oxypropylene)polyether polyol containing not less than about 98% by weight of propylene oxide component to form a foam having a substantially skeletal reticulated structure.
Dependencies are inferred from the claim text.