High-permeability epoxy waterproof paint

Abstract

The invention relates to high-permeability epoxy waterproof paint. The high-permeability epoxy waterproof paint is prepared from modified epoxy resin and a part of high-permeability materials. The paint is prepared from a component A, and a component B. The component A is prepared from 50-75 parts of bisphenol A epoxy resin, 5-15 parts of reactive diluents, 10-20 parts of epoxy resin active flexibilizer and 20-40 parts of benzene diluents. The mixed diamine curing agent is prepared from 15-20 parts of polyether amine D 2000 and 10-15 parts of D 230. The component B is prepared from the mixed diamine curing agent, 50-70 parts of diluents, 2-5 parts of accelerant and 20-30 parts of benzene diluents. The solution A and a solution B are mixed to obtain the paint. The paint has high permeability and flexibility and can permeate and repair cracks and pores in surfaces of concrete, and a sealed whole waterproof structural layer is formed on the surfaces of concrete. Even when surface film forming matter is damaged, the surfaces of the concrete are closed by the paint to form the compact waterproof structure layers, and therefore the permanent waterproof effect is achieved.

Description

technical field [0001] The invention relates to a high-permeability epoxy resin waterproof coating, which belongs to the technical field of coating preparation. Background technique [0002] For concrete structure buildings and road bridges, concrete and steel bars are the most ideal combination. Although steel is a substance that is easily corroded, if the surrounding environment can remain stable and alkaline, steel will not be corroded. Once chloride ions, water, and acid ions penetrate into the concrete, the pH of the concrete will drop from 11 to below 7, and the steel bars in the concrete structure will begin to corrode. Waterproof performance is one of the most important factors affecting the life of concrete structures. [0003] Traditional waterproof materials, such as emulsified asphalt, polyurethane, etc., all form a waterproof film on the surface of the concrete structure, which can play a good waterproof role on the concrete surface. Due to stress, the waterp...

AI Technical Summary

Problems solved by technology

The penetration performance of epoxy resin using this series of curing agents is unstable, and the initial penetration is good during construction, but after the solvent evaporates, it is prone to defects such as low strength and easy delamination

At the same time, these curing agents themselves have poor toughness after curing with the epoxy resin, and the flexibility of the product can only be adjusted by adding a toughening agent. Once the performance of the toughening agent is shifted or the addition is uncomfortable, the product will be prone to aging and brittle rebound after curing. , resulting in damage to the waterproof layer