Double-component polyurethane repairing adhesives and preparation method thereof

Abstract

The invention relates to double-component polyurethane repairing adhesives and a preparation method thereof. The weight ratio of a component A to a component B is 1 to 1, and the double-component polyurethane repairing adhesives are prepared from the following substances in parts by weight: the component A is prepared from 30 parts to 40 parts of oil polyols, 3 parts to 5 parts of chain extender,15 parts to 20 parts of butoxy-bisphenol A, 0.7 part to 0.8 part of pigment, 0.1 part to 0.2 part of catalyst, 23 parts to 24 parts of flame retardant, and 18.2 parts to 20 parts of calcium sulfate whiskers; and the component B is prepared from 100 parts of polyurethane prepolymer. The two components A and B of the double-component polyurethane repairing adhesives are prepared according to the weight ratio of 1 to 1, an operation is simple, solvents are not needed to be added additionally in a using process, environmental protection and no toxicity are achieved, and moreover, even under a low-temperature condition in winter, low viscosity required by crack pouring also can be met, and the double-component polyurethane repairing adhesives have the advantages of higher water resistance performance, low temperature resistance performance, high adhesion performance, flexibility and higher mechanical performance.

Description

technical field [0001] The invention relates to a two-component polyurethane repair adhesive for road surfaces and a preparation method thereof, belonging to the field of adhesives. Background technique [0002] Cracks are one of the most common and most prone early diseases of pavement. Although the initial cracks have no obvious impact on the performance of the highway pavement, if the cracks appearing on the highway pavement are not treated in time, the rainwater will infiltrate along the cracks and accumulate under the road slab. The action of rainwater and roadbed will produce mud pumping, which will cause the road surface to be hollowed out, seriously causing the road pavement to be broken and pits to appear, causing structural damage to the road surface and reducing the service life of the road surface. Therefore, it is necessary to carry out timely filling and repairing of the highway pavement. [0003] Traditional repair materials are based on modified asphalt. Si...

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Problems solved by technology

[0003] Traditional repair materials are based on modified asphalt. Since asphalt is a heat-sensitive material, its strength will decrease in summer, and it will become soft and oily or cracked by pushing; it will become brittle at low temperature and will be damaged by the rolling of vehicles and the Influenced by its own thermal expansion and contraction force, the repaired pavement will soon crack again; in addition, the water resistance and aging resistance of asphalt are poor, and water damage is easy to occur, and the durability is not easy to guarantee

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