Polymer concrete by percolation
OwnerRansome J. Wymaninventor
Life of this patent
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Abstract
A composition and method for use in the repair of a roadway are described. A lower molecular weight hydroxyl terminated polyether polyol is reacted with an organic polyisocyanate in the presence of solvents having a specific gravity in excess of 1, and catalyzed by organic mercury and organic lead catalysts in amounts sufficient to cause the composition to gel in about thirty seconds. The reaction products are pumped or poured over an aggregate and allowed to percolate therethrough to form a flush roadway repair.
Claims14
A method for the repair of a roadway having a cavity therein, comprising:
- filling the cavity with an aggregate;
- forming a solution comprising from about 0 to 8% of an OH terminated polyether polyol having a molecular weight of less than 2,000, from about 23 to 35% of an organic polyisocyanate from about 38 to 58% of a solvent having a specific gravity of greater than 1, from about 8 to 16% of a diaminotetrahydroxyl polyol, from about 0.15 to 0.3% to an organic mercury catalyst and from about 0 to 1% of an organic lead catalyst;
- and
- dispersing the solution through the aggregate and allowing the solution to percolate therethrough to fill the cavity.
A method for filling an aggregate matrix with solid material, comprising forming a solution having a specific gravity of from about 1.25 to 1.6 and an initial viscosity of less than 150 cps, and including:
- from about 8 to 16% of a diaminotetrahydroxyl polyol,
- from about 38 to 58% of a solvent,
- from about 23 to 35% of an organic polyisocyanate,
- from about 0 to 8% of an OH-terminated polyether polyol having a molecular weight of less than 2,000,
- from about 0.15 to 0.3% of an organic mercury catalyst, and
- from about 0 to 1% of an organic lead catalyst;
- dispersing the solution into the aggregate matrix, and allowing the solution to polymerize to form the solid material.
A method for the formation of a polyurethane concrete, comprising:
- providing a first solution and a second solution, including, in toto,
- from about 0 to 8% of an OH-terminated polyether polyol having a molecular weight of less than 2,000,
- from about 38 to 58% of a solvent having a specific gravity of less than 2,000,
- from about 23 to 35% of an organic polyisocyanate,
- from about 8 to 16% of a diaminotetrahydroxyl polyol,
- from about 0.15 to 0.3% of an organic mercury catalyst, and
- from about 0 to 1% of an organic lead catalyst,
- with the organic lead catalyst, organic mercury catalyst and the diaminotetrahydroxyl polyol being present only in the first solution and the organic polyisocyanate being present only in the second solution;
- mixing the first and second solutions to form a third solution;
- and
- dispersing the third solution through an aggregate matrix to form the polyurethane concrete.
A method for the formation of a polyurethane concrete, comprising:
- providing an aggregate matrix;
- forming a solution having an initial viscosity of less than about 150 centipoise, and comprising,
- from about 0 to 8% of an OH-terminated polyether polyol having a molecular weight of less than 2,000,
- from about 23 to 35% of an organic polyisocyanate,
- from about 38 to 58% of a solvent having a specific gravity of greater than 1,
- from about 8 to 16% of a diaminotetrahydroxyl polyol,
- from about 0.15 to 0.3% of an organic mercury catalyst and
- from about 0 to 1% of an organic lead catalyst;
- and
- dispersing the solution through the aggregate and allowing the solution to percolate therethrough and solidify, to form the polyurethane concrete.
Dependencies are inferred from the claim text.