High-strength underwater structure adhesive and preparation method thereof

Abstract

The invention discloses a high-strength underwater structure adhesive and a preparation method thereof. The adhesive is prepared by mixing a component A and a component B according to a weight ratio of 1:1, wherein the component A comprises the following components in parts by weight: 30-48 parts of nano rubber modified epoxy resin, 50-70 parts of bisphenol A epoxy resin and 4-6 parts of thixotropic agent; the component B comprises the following components in parts by weight: 50-60 parts of underwater curing agent, 1-2 parts of accelerant, 1-3 parts of coupling agent, 2-4 parts of moistening agent, 1-2 parts of thixotropic agent and 40-80 parts of packing. Practical application shows that the high-strength underwater structure adhesive has the characteristics of complete underwater adhesion, underwater curing, high adhesion strength and short curing time, can be applied to repairing in an adhesion manner, sealing to stop leakage, and curing of various underwater buildings, and is simple in production method and process and is easy to operate.

Description

technical field [0001] The invention belongs to the technical field of engineering glue, and specifically refers to a high-strength underwater structural glue and a preparation method thereof. Background technique [0002] At present, adhesives for various purposes have been widely used in various fields of economic construction due to their low cost, convenient construction, and strong adhesion. During the construction process using adhesives, the bonding surface is required to be dry, clean and free of oil. However, underwater high-strength structural adhesives are required for underwater bonding repair, sealing, leak plugging, and reinforcement of various underwater structures such as reservoirs, dams, culverts, bridge piers, embankments, port terminals, ships, and oil and gas pipelines. . At present, some underwater adhesives have been developed successively at home and abroad, and ordinary epoxy resins and amine curing agents are used in their formulations. Although ...

AI Technical Summary

Problems solved by technology

Although ordinary epoxy resin is insoluble in water, it is brittle when amine is cured; amine curing agents are generally soluble in water, and are easy to combine with water when curing underwater, losing activity, and the ring-opening ability is extremely reduced, so that the curing is difficult. Complete; and the specific gravity of ordinary epoxy resin is generally less than that of water, which is not easy to adhere to the adherend and is easy to disperse and lose; many toughening agents are also mostly soluble in water, and cannot achieve toughening effect when curing underwater

resulting in low bond strength

[0003] Before the present invention, the Chinese invention patent with the application number 201110224028.X disclosed an underwater epoxy structural adhesive. The shear strength of the adhesive was 16.6MPa and the tensile strength was 31.2MPa after forming in an underwater environment. Its strength index conforms to the standard requirements of steel glue in GB50367-2006 "Code for Strengthening Design of Concrete Structures", but this standard is not the standard for underwater structural adhesives, and its shear strength of 16.6MPa does not meet JT / T215-1995 "Water The standard requirements for shear strength ≥ 19.4MPa in "Technical Requirements and Experimental Methods for Adhesives"

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