Acid-proof and high temperature-resistant adhesive

Abstract

The invention aims at providing an acid-proof and high temperature-resistant adhesive, which has strong acid resistance, good heat resistance, high weather fastness and good thixotropy, and is easy to operate. The acid-proof and high temperature-resistant adhesive is composed of a component A and a component B, wherein the component A comprises the following ingredients in parts by mass: 3-4 parts of 107 silicon rubber, 3-6 parts of inorganic nano material and 0-4 parts of accessory ingredients; the component B comprises the following ingredients in parts by mass: 3-4 parts of 201 silicone oil, 3-4 parts of imported carbon black, 1-2 parts of thixotropic agent, 1-2 parts of plasticizer, 0.5-1 part of chain extender, 1-2 parts of cross-linking agent, 0.2-1 part of coupling agent and 0.1-A parts of catalyst. The acid-proof and high temperature-resistant adhesive has good thixotropy, is easy to operate, and can be simply operated in the field.

Description

Technical field: [0001] The invention relates to an acid-resistant and high-temperature resistant adhesive, which is mainly used for bonding anti-corrosion and desulfurization materials on the inner wall of the chimney of a thermal power plant. Background technique: [0002] At present, thermal power plants are the main cause of increasing air pollution and acid rain in my country. The sulfur dioxide emissions of thermal power plants account for about 50% of the country's total. In recent years, the state has taken a series of measures to greatly improve the flue gas desulfurization construction of power plants. After the flue gas is desulfurized by wet method, the humidity increases and the temperature decreases, so it is easy to condense on the inner wall of the chimney, and the residual sulfur trioxide in the flue gas dissolves to form a highly corrosive dilute sulfuric acid solution. The disadvantages are: 1. The humidity of the flue gas is high. The corrosive medium co...

AI Technical Summary

Problems solved by technology

The disadvantages are: 1. The humidity of the flue gas is high. The corrosive medium contained in the saturated flue gas is under the double action of flue gas pressure and humidity, so that the materials with poor structural density inside the chimney are easily corroded and affect the structure. 2. Low-concentration sulfuric acid liquid wall and high-concentration acid solution are more corrosive; 3. When the temperature of the acid solution is between 40°C and 80°C, it is particularly corrosive to structural materials

At the same time, this scheme puts forward higher and stricter requirements on the performance of the adhesive used for pasting the inner lining. The adhesive is required to have the characteristics of acid resistance, aging resistance, high temperature resistance, and high bonding strength. At present, only silicone rubber has this property. , the toughness of epoxy glue is not good, the smell of acrylic glue will affect the metal adhesion, the aging resistance of polyurethane glue is poor, other neoprene glue, phenolic glue, etc. do not meet the above properties

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