High-adhesive two-component epoxy-polyurethane blend material and its preparation method

Abstract

The invention provides a high-adhesion and double-component epoxy-polyurethane commixed material and a preparation method thereof. The commixed material is prepared from a component A and a component B by mixing, wherein the component A comprises the following components in percentage by mass: 78%-90% of polyether polyol, 5%-18% of a cross-linking agent, 1%-4% of a foaming agent, 1%-4% of a foam stabilizer, 1%-1.5% of a cross-linking type catalyst and 1.5%-3% of a foaming and epoxy cured bi-catalyst; the component B is prepared from polyphenyl polymethylene polyisocyanate and epoxy resin and the mass ratio of the polyphenyl polymethylene polyisocyanate to the epoxy resin ranges from (15 to 1) to (2 to 1); and the use amount of the foaming and epoxy cured bi-catalyst accounts for 2%-40% of the weight of the epoxy resin. The commixed material has an interpenetrating network structure formed by commixing bisphenol A epoxy resin (EP) and polyurethane (PU) and is a novel chemical grouting material which has the advantages of a polyurethane grouting material and an epoxy resin grouting material; and the commixed material can be formed and can also be rapidly cured and adhered on a wet surface at a room temperature, and diseases including void, looseness, cracks, interlayer water, erosion and the like of a base course and the like are hopefully solved.

Description

technical field [0001] The invention relates to a two-component epoxy-polyurethane blend material and a preparation method thereof. Background technique [0002] For some areas with weak foundations, if the buildings or roads are not considered in the design or construction stage or effective foundation treatment measures are not taken, large-area land subsidence will easily occur after completion or during use. During the settlement process of buildings or roads, it is often accompanied by a large area of ​​void, which creates a very large safety hazard and seriously leads to collapse accidents. [0003] At present, there are many methods of foundation reinforcement treatment. The traditional excavation and reconstruction cause a great waste of resources, and often settlement will still occur after reconstruction; Foundation reinforcement technology for deflected objects and buildings. In order to prevent continuous uneven settlement of the foundation, professional mechan...

AI Technical Summary

Problems solved by technology

These grouting materials have good water resistance and aging resistance, but for projects such as pavements that are subject to dynamic loads and are greatly affected by uneven force, there are few research reports so far.

The currently reported road repair materials are mainly cement-based inorganic materials and polyurethane-based organic materials. The cement grouting material has a large particle size and poor flow, so it cannot be used to pour fine cracks. Polyurethane grouting materials have excellent mechanical properties (such as compression resistance Intensity and bonding strength) are not as good as epoxy grouting materials, so for the long-term dynamic load on the road surface and the uneven force on the road surface, the bearing capacity is insufficient, and the durability is not good, so it is not suitable for expressway roadbed repair

Although epoxy resin has the advantages of high adhesive force, curable at room temperature, small shrinkage after curing, high mechanical strength, heat resistance, and good stability, it cannot be made into foamed materials for filling The void in the foundation requires a larger amount of pouring than polyurethane grout, so the construction cost is much higher than that of polyurethane grouting materials

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