Preparation method for flame-retardant heatproof corrosion-resistant adhesive

Abstract

The invention provides a preparation method for a flame-retardant heatproof corrosion-resistant adhesive, belonging to the technical field of chemical adhesives. The preparation method comprises the following steps: 1) preparation of a component A: adding hydroxyl-terminated polydimethylsiloxane, an antifoaming agent, flame-retardant polyether polyol, a coupling agent and a solvent into a reaction vessel, successively carrying out heating and stirring, then successively adding an inorganic filling material and a fire retardant, carrying out vacuum-pumping for 10 to 30 min under stirring, and carrying out cooling and filtering after uniform mixing so as to obtain the component A; 2) preparation of a component B: mixing a semi-closed isocyanate curing agent, a catalyst and a solvent at room temperature under stirring so as to obtain the component B; and 3) preparation of the adhesive: mixing the component A with the component B under stirring so as to obtain the flame-retardant heatproof corrosion-resistant adhesive. According to the invention, flame-retardant polyether polyol is added, so the nitrogen content of a molecular chain is increased, and thermal stability of a paint is enhanced; a combustion product is low in smoke and free of toxicity; and the flame-retardant heatproof corrosion-resistant adhesive overcomes the defects of conventional adhesives, meets demands of on-site construction and improves the competitiveness of an enterprise.

Description

Technical field [0001] The invention belongs to the technical field of chemical adhesives, and specifically relates to a preparation method of a flame-retardant, temperature-resistant and corrosion-resistant adhesive. Background technique [0002] Thermal power plants use coal combustion to generate electricity, and the flue gas emitted contains a lot of dust and SO 2 , NOx and other pollutants seriously endanger human health, so most thermal power plants use wet limestone desulfurization technology for desulfurization. However, after wet desulfurization, the flue gas temperature decreases and the humidity increases, and the inner wall of the chimney condenses and dissolves SO 3 It produces a very corrosive dilute sulfuric acid solution, which is very corrosive to the chimney. At the same time, the chimney operating environment is complicated, and the flue gas temperature is often changed at 40-180℃, or even above 200℃. Therefore, the chimney lining material must be It is resista...

AI Technical Summary

Problems solved by technology

However, the temperature of flue gas after wet desulfurization decreases, the humidity increases, and the inner wall of the chimney condenses and dissolves SO 3 It produces highly corrosive dilute sulfuric acid, which is highly corrosive to the chimney. At the same time, the operating environment of the chimney is complex, and the temperature of the flue gas often varies between 40-180 ° C, or even above 200 ° C. Therefore, the lining material of the chimney must be It has the ability to resist strong acid corrosion and temperature difference change

[0003] More importantly, in the actual construction process, the anti-corrosion engineering construction of the entire thermal power plant generally needs to be completed within 3 to 6 months. Therefore, in order to complete the construction operation within the specified time, it is necessary to construct multiple points and multiple lines at the same time. , there is often a situation where anti-corrosion construction and welders work together, there is a great risk of fire, which seriously threatens the personal safety of the project and its construction personnel. Therefore, in order to improve the competitiveness and viability of the enterprise, it is necessary to use flame-retardant adhesive for construction

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