Solvent-free coumarone modified epoxy heavy-duty anticorrosive coating

Abstract

The invention discloses a coumarone modified epoxy heavy-duty anticorrosive coating and a preparation method thereof. The coating comprises a base coat and a finish coat and is characterized in that the base coat comprises a component A and a component B, the finish coat comprises a component C and the component B, the components A and C respectively contain an organophosphorus flameretardant agent, a mixed solvent of dimethylbenzene and PMA (propylene glycol monomethyl acetate), liquid coumarone resins, a barium zinc stabilizer, a dispersing agent with a superhigh molecular weight, a reaction type epoxy toughening agent, solid coumarone resins, epoxy resins, fumed silica, a flatting agent, a defoaming agent and a flavour agent, wherein the component A also contains barite powder, calcium fluophosphate powder and mica powder, the component C also contains high titanium powder and a tinting pigment, and the component B contains an epoxy curing agent and an epoxy curing accelerator. According to the invention, the cost of the prepared product is low, and the prepared product has good physical, mechanical and anticorrosive properties.

Description

technical field [0001] The invention relates to a coating, in particular to a heavy-duty anti-corrosion coating with environmental protection and outstanding performance. Background technique [0002] Epoxy asphalt paint, also known as tar epoxy paint, is an epoxy paint modified by coal tar pitch. This kind of paint combines the acid resistance, alkali resistance, water resistance of coal tar pitch, and the adhesion of epoxy resin. Mechanical strength and solvent resistance, it is an excellent anti-corrosion paint variety. Widely used in water conservancy engineering facilities, the outer wall of underground pipelines, the shipbuilding industry and chemical equipment and the inner wall of pipelines. Like normal epoxy coatings, epoxy bituminous coatings also have a problem with the interval between coatings. After exceeding the maximum coating interval, the coating surface should also be roughened, otherwise the adhesion between layers will be compromised. [0003] The mai...

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Problems solved by technology

[0005] (2) Asphalt has strong color bleeding, and other light-colored paints cannot be painted on the surface of epoxy asphalt coatings. If it is painted, it is difficult for the underlying asphalt to prevent it from penetrating into the surface, causing discoloration of the light-colored paint on the surface;

[0006] ⑶ In recent years, studies have shown that coal tar pitch contains strong carcinogens, which will be harmful to the health of paint manufacturers and paint construction personnel

[0012] (2) The curing speed at room temperature is slow, and the wet film thickness exceeds 80 microns, and there will be sag phenomenon. If you want to obtain the best protective thickness of 300 microns or more, you usually need to apply it more than three times, and the interval between each coat should be several hours. Even waiting for several days to cure, so the construction period is long and the work efficiency is low

[0013] ⑶ In this paint system, the volatile organic compound (VCO) content of the original paint is about 25-35%, and about 20-30% of organic solvents need to be added during application, which will pollute the environment and endanger the health of construction workers

[0014] ⑷ Restricted by the ambient temperature, construction cannot be performed when the ambient temperature is lower than 10°C

[0015] ⑸ Bisphenol A type epoxy topcoat is easy to chalk and lose gloss outdoors, so it is only used for indoor coating and cannot be used as outdoor coating

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