Epoxy resin anti-corrosion material improves toughness and flexural strength

The epoxy resin anti-corrosion material is mainly composed of the following materials. The first is epoxy resin, which refers to the general term for polymers containing epoxy groups. It is mainly suitable for medium that is not very corrosive. It has outstanding alkali resistance and can also resist general acid (except hydrofluoric acid) corrosion. Foreign anti-corrosion market The demand for epoxy resin has been greatly reduced, mainly due to the rapid development of unsaturated polyester resins in corrosion-resistant resins, and the variety of unsaturated polyester resins. Due to the late start of unsaturated polyester resins in the domestic market, epoxy resins are still One of the main resin varieties in the field of anti-corrosion. The main characteristics of epoxy resin are high bonding strength, low shrinkage, high product brittleness, high price, and the use temperature of resin cured at room temperature does not exceed 80 °C; the second is the curing agent of epoxy resin, including amines, acid anhydrides , resin compounds and other major varieties, of which amine compounds are the most commonly used, which can be divided into aliphatic amines, aromatic amines and modified amines. Compounds such as amide and diethylenetriamine have high toxicity and odor, so they are gradually replaced by new non-toxic and low-toxic curing agents (such as: T31.590, C20, etc.) It can be cured, so it has attracted people's attention and praise; the third is diluent, the dilution of epoxy resin usually uses non-reactive diluents such as: ethanol, acetone, benzene, toluene, xylene, etc., 2 kinds of non-reactive diluents can be mixed Use, sometimes in order to reduce the shrinkage of the cured product, reduce pores and cracks, also use reactive diluents, such as propylene oxide butyl ether, propylene oxide phenyl ether, polyglycidyl ether, etc.; Toughening agent, pure epoxy resin is relatively brittle after curing, and has poor impact toughness, flexural strength and heat resistance. Plasticizers and toughening agents are commonly used to increase plasticity, toughness, flexural strength and impact of resins. Toughness; Fifth, fillers, powder, fine aggregate, coarse aggregate, and glass flakes are collectively referred to as fillers. Adding appropriate fillers can reduce the cost of the product and improve its performance. The amount of filler in the glue is generally It is 20 to 40% (weight) of the resin dosage. When preparing the putty, the amount added can be more, generally 2 to 4 times the amount of the resin. The commonly used powders are quartz powder, porcelain powder, and graphite powder, Dolerite powder, talc powder, mica powder, etc.