Underwater epoxy structure adhesive and preparation method thereof

Abstract

The invention discloses an underwater epoxy structure adhesive comprising a component A and a component B, wherein the component A comprises 43.0-60.0% of bisphenol A epoxy resin, 3.0-5.0% of flexibilizer, 13.0-30.0% of kaolin, 7.0-15.0% of fast-setting cement, 1.0-3.0% of thixotropic agent, 2.0-4.0% of calcium sulfate whisker and 0.1-0.5% of surfactant; and the component B comprises 10.0-40.0% of hydrophobic curing agent, 10.0-40.0% of hydrophilic curing agent, 0.5-1.0% of accelerator, 1.0-3.0% of coupling agent, 1.0-5.0% of thixotropic agent, 10.0-24.0% of fast-setting cement and 15.0-36.0%of packing. The underwater epoxy structure adhesive disclosed by the invention can be applied to structural bonding engineering in various damp environments and various underwater environments and has high underwater bonding strength the index of which meets the standard requirement of GB50367-2006.

Description

technical field [0001] The invention relates to an adhesive formula and a preparation method thereof, in particular to an underwater epoxy structural adhesive and a preparation method thereof, which are mainly used in structural bonding projects in underwater environments. Background technique [0002] With the rapid development of social economy, adhesives have been widely used in various fields of national economic construction, the scope of use is getting wider and wider, and the application conditions are getting wider and wider. Usually, in order to ensure the success of bonding, the surface of the adhered object is required to be clean, dry, and pollution-free. However, with the increasing number of various hydraulic construction projects, such as light rail tunnels, tunnels, etc. Next use the adhesive. [0003] In recent years, some underwater bonding technologies and adhesives for underwater construction have been researched and developed at home and abroad, mainly ...

AI Technical Summary

Problems solved by technology

[0003] In recent years, some underwater bonding technologies and adhesives for underwater construction have been researched and developed at home and abroad, mainly composed of resins, water curing agents and fillers; among them, resins include epoxy resins, polyurethanes, etc.; water curing agents There are ketimine and modified amine; fillers include calcium oxide, calcium chloride, etc. The developed underwater adhesive has a high compressive strength, but the bonding performance is not good, and some indicators are molded in a dry environment. , the data measured by curing in a humid environment; this will inevitably affect the use effect of underwater adhesives in actual use environments

Moreover, since the surface of the adherend and its surroundings contain a lot of water in the underwater environment, the water film on the surface of the adherend affects the bonding strength of the epoxy adhesive, so the above-mentioned adhesives generally cannot be structurally bonded underwater.

[0004] Chinese invention patent application CN101020807A discloses a kind of epoxy resin underwater adhesive, which can be fully solidified underwater, and the mechanical properties of the underwater bonded concrete measured by it are close to the mechanical performance index of the C50 concrete strength grade, and the underwater bonding The strength of A3 steel is also relatively high, its tensile strength and shear strength can reach 5.3MPa and 13.3MPa respectively, but its measurement method is under normal conditions instead of underwater environment, so the reference of the measurement results is poor, and the above The test results also did not meet the standard requirements for steel glue in GB50367-2006 "Code for Design of Concrete Structure Reinforcement", so it cannot be used for underwater structural bonding