초록 ▼

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 c

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.

대표청구항 ▼

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 a

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.