Binder and method of making it
AssigneeEmerson Electric Co.
InventorPaul V. Henton
Life of this patent
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Abstract
An aluminum phosphate type binder composition includes certain other metallic phosphates in proportions of equivalents of aluminum to the other metals between about 0.70 and 2.90, and proportions of the sums of all of the metals to mole equivalents of phosphoric acid lie between about 1.00 and 1.80. A method of producing the binder includes adding a slurry of aluminum hydroxide and certain other metallic salts to phosphoric acid in such a way as to generate sufficient heat to permit the reaction to proceed to completion at or near the boiling point.
Claims10
A modified aluminum phosphate binder consisting essentially of an aqueous solution of phosphates of aluminum and at least one of the group consisting of calcium, magnesium, zinc, strontium, antimony, lead, iron and cadmium, said solution being formed by the controlled reaction of phosphoric acid and an aqueous slurry of at least one of salts of said metals taken from the group consisting of oxides, hydroxides and carbonates, wherein the number of equivalents of aluminum is within the range of about 0.70 to 2.90 times the total equivalents of the other metal or metals and the total number of equivalents of said aluminum and other metal or metals is within the range of about 1.00 to 1.80 times the number of mole equivalents of phosphoric acid required to supply the phosphate content of the binder.
A modified aluminum phosphate binder consisting essentially of an aqueous solution of calcium, magnesium, and aluminum phosphates, said solution being formed by the controlled reaction of phosphoric acid and an aqueous slurry of at least one of salts of calcium, magnesium and aluminum, taken from the group consisting of oxides, hydroxides and carbonates, in which the number of equivalents of aluminum is within the range of 0.70 to 2.90 times the sum of the calcium and magnesium equivalents and in which the total calcium, magnesium and aluminum equivalents is within the range of 1.00 to 1.80 times the number of moles of phosphoric acid required to supply the phosphate content of the binder.
A modified aluminum phosphate binder consisting essentially of an aqueous solution of magnesium and aluminum phosphates, said solution being formed by the controlled reaction of phosphoric acid and an aqueous slurry of at least one of salts of magnesium and aluminum taken from the group consisting of oxides, hydroxides and carbonates, in which the number of equivalents of aluminum is within the range of 0.70 to 2.90 times the number of equivalents of magnesium and in which the total magnesium and aluminum equivalents is within the range of 1.00 to 1.80 times the number of moles of phosphoric acid required to supply the phosphate content of the binder.
A modified aluminum phosphate binder consisting essentially of an aqueous solution of calcium and aluminum phosphates, said solution being formed by the controlled reaction of phosphoric acid and an aqueous slurry of at least one of salts of calcium and aluminum taken from the group consisting of oxides, hydroxides and carbonates, in which the number of equivalents of aluminum is within the range of 0.70 to 2.90 times the number of equivalents of calcium and the total calcium and aluminum equivalents is within the range of 1.00 to 1.40 times the number of moles of phosphoric acid required to provide the phosphate content of the binder.
A modified aluminum phosphate binder consisting essentially of an aqueous solution of calcium, magnesium, zinc and aluminum phosphates, said solution being formed by the controlled reaction of phosphoric acid and an aqueous slurry of at least one of salts of calcium, magnesium, zinc and aluminum taken from the group consisting of oxides, hydroxides, and carbonates, in which the number of aluminum equivalents is within the range of 0.70 to 2.90 times the sum of the calcium, magnesium, and zinc equivalents and the total calcium, magnesium, zinc and aluminum equivalents is within the range of 1.00 to 1.80 times the number of moles of phosphoric acid required to furnish the phosphate content of the binder.
A modified aluminum phosphate binder consisting essentially of an aqueous solution of calcium, zinc and aluminum phosphates, said solution being formed by the controlled reaction of phosphoric acid and an aqueous slurry of at least one of salts of calcium, zinc and aluminum taken from the group consisting of oxides, hydroxides and carbonates, in which the number of aluminum equivalents is within the range of 0.70 to 2.90 times the sum of the calcium and zinc equivalents and the total calcium, zinc and aluminum equivalents is within the range of 1.00 to 1.80 times the number of moles of phosphoric acid needed to supply the phosphate content of the binder.
A modified aluminum phosphate binder consisting essentially of an aqueous solution of zinc and aluminum phosphates, said solution being formed by the controlled reaction of phosphoric acid and an aqueous slurry of at least one of salts of zinc and aluminum taken from the group consisting of oxides, hydroxides and carbonates, in which the number of aluminum equivalents is within the range of 0.70 to 2.90 times the number of zinc equivalents and the total zinc and aluminum equivalents is within the range of 1.00 to 1.80 times the number of moles of phosphoric acid required to furnish the phosphate content of the binder.
A modified aluminum phosphate binder consisting essentially of an aqueous solution of magnesium, zinc and aluminum phosphates, said solution being formed by the controlled reaction of phosphoric acid and an aqueous slurry of at least one of salts of magnesium, zinc and aluminum taken from the group consisting of oxides, hydroxides and carbonates, in which the aluminum equivalents is within the range of 0.70 to 2.90 times the sum of the magnesium and zinc equivalents and the total magnesium, zinc and aluminum equivalents is within the range of 1.00 to 1.80 times the number of moles of phosphoric acid required to furnish the phosphate content of the binder.
A method of manufacturing a liquid solution of a modified aluminum phosphate binder comprising the steps of preparing an aqueous slurry of aluminum hydroxide and at least one other metal compound taken from the group consisting of zinc dust and oxides, hydroxides and carbonates of calcium, magnesium, zinc, strontium, antimony, lead, iron and cadmium, combining said slurry with phosphoric acid to cause the components of the slurry to react with said phosphoric acid at a rate such as to produce and maintain a temperature of the reactants sufficiently high to permit essentially complete solution of the slurry components in said acid, said aluminum and said other metal compound or compounds being present in said slurry in relative amounts such that the number of equivalents of aluminum is within the range of about 0.70 to 2.90 times the total equivalents of the other metal or metals and the total number of equivalents of said aluminum and other metal or metals is within the range of about 1.00 to 1.80 times the number of mole equivalents of said phosphoric acid.
A method of manufacturing a liquid solution of a modified aluminum phosphate binder comprising the steps of preparing an aqueous slurry of aluminum hydroxide and at least one other metal compound of the group consisting of calcium oxide, calcium hydroxide, magnesium oxide, magnesium hydroxide, and zinc oxide, combining said slurry with phosphoric acid to cause the components of said slurry to react with said phosphoric acid at a rate such as to produce and maintain a temperature of the reactants sufficiently high to permit essentially complete solution of the slurry components in said acid, said aluminum and said other metal compound or compounds being present in said slurry in relative amounts such that the number of equivalents of aluminum is within the range of about 0.70 to 2.90 times the total equivalents of the other metal or metals and the total number of equivalents of said aluminum and other metal or metals is within the range of about 1.00 to 1.80 times the number of mole equivalents of said phosphoric acid.
Dependencies are inferred from the claim text.