Ultrathin water-based epoxy resin expandable fireproof paint and preparation method thereof

Abstract

The invention relates to an ultrathin water-based epoxy resin expandable fireproof paint and a preparation method thereof, belonging to the technical field of plating metal materials. The fireproof paint comprises water, aqueous epoxy emulsion, a solidification agent, ammonium polyphosphate, a charring foaming agent, a charring accelerant, nano fillers, inorganic fireproof fillers, a dispersing agent, a defoaming agent and a thickening agent. A ball milling machine is adopted for preparing a double-component paint; component A is prepared by two steps of: (1) dispersing the ammonium polyphosphate, the charring foaming agent, the charring accelerant, the nano fillers and the inorganic fireproof fillers in the water by the dispersing agent, with the milling time of 1 to 2 hours; and (2) adding the solidification agent and the defoaming agent for continuously milling for 0.5 to 1 hour; and component B is prepared by one step of: milling the aqueous epoxy emulsion, the thickening agent and the defoaming agent for 0.5 to 1 hour. When the coating thickness of the fireproof paint is smaller than or equal to 1mm, the fireproof time is larger than 90 minutes, the maximum smoke density is smaller than 50, and the adhesion force is larger than or equal to 12MPa. The invention has the advantages of simple preparation process, environmental protection and excellent performance, and can be used for the fire safety protection of the inner parts of large steel structures of buildings, ships, oil storage tanks and the like.

Description

technical field

[0001] The invention belongs to the technical field of plating metal materials, and relates to an ultra-thin water-based epoxy resin expansion type fireproof coating and a preparation method thereof. It is suitable for fire safety protection inside large stadiums, terminal buildings, ships and high-rise steel structure buildings. Background technique

[0002] The intumescent fire retardant coating is a coating formed by dispersing the intumescent flame retardant composed of acid source, carbon source and gas source in a solvent with resin as the film-forming substance. Under the action of flame or high temperature, the coating prepared by the intumescent fireproof coating, the acid source releases the inorganic acid that can esterify the carbon source as a dehydrating agent, and the carbon source undergoes esterification, crosslinking and carbonization reactions under the action of the dehydrating agent. The gas generated by the gas source makes the molten s...

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