Safety fuel tank containing reticulated polyurethane foam mixture of poly(oxypropylene-(oxyethylene)polyetherpolyols
AssigneeBridgestone Tire Company Limited
InventorsToshio Yukuta, Kazuo Yagura, Nobuhisa Fuchigami
Life of this patent
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Abstract
A safety fuel tank for automobiles and the vehicles, wherein substantially skeletal reticulated flexible polyurethane foam is integrally foamed, is produced by reacting a mixture of (a) poly(oxypropylene-oxyethylene)polyetherpolyol having 51-98% by weight of ethylene oxide component and (b) poly(oxypropylene-oxyethylene)polyetherpolyol having not less than 51% by weight of propylene oxide component as the polyhydroxyl compound with an organic polyisocyanate in the presence of a catalyst, a foaming agent, a surfactant and an additive in a fuel tank.
Claims10
A safety fuel tank wherein substantially skeletal reticulated flexible polyurethane foam is integrally foamed, which is obtained by reacting a mixture of (a) poly(oxypropylene-oxyethylene)polyetherpolyol having 51-98% by weight of ethylene oxide component and (b) poly(oxypropylene-oxyethylene)polyetherpolyol having not less than 51% by weight of propylene oxide component as the polyhydroxyl compound with an organic polyisocyanate in the presence of a catalyst, a foaming agent, a surfactant and an additive in a fuel tank.
A method for producing a safety fuel tank, the entire space of which is filled with substantially skeletal reticulated flexible polyurethane foam, which comprises feeding a given amount of a compounding liquid for a flexible polyurethane foam consisting of polyhydroxyl compounds consisting of a mixture of (a) poly(oxypropylene-oxyethylene)polyetherpolyol having 51-98% by weight of ethylene oxide component and (b) poly(oxypropylene-oxyethylene)polyetherpolyol having not less than 51% by weight of propylene oxide component;
- an organic polyisocyanate;
- a catalyst;
- a foaming agent;
- a surfactant and an additive into a fuel tank, and foaming said compounding liquid.
Dependencies are inferred from the claim text.