An ultra-thin intumescent steel structure water-based fireproof coating and preparation method thereof

Abstract

The invention relates to a waterborne fireproof coating for an ultrathin expanded steel structure and a preparation method thereof. The fireproof coating is prepared from the following components in parts by weight: 12 to 14 parts of silicone acrylic emulsion, 16 to 18 parts of vac-veova emulsion, 2.0 to 2.5 parts of expanded perlite, 1.0 to 1.5 parts of hollow glass micro-beads, 39 to 42 parts ofa microencapsulated flame retardant measured by a core material, 3.5 to 4.0 parts of a microencapsulated synergistic flame retardant measured by the core material, 4.5 to 5.0 parts of filler, 1.5 to1.8 parts of a preservative and 3.5 to 4.2 parts of a coating additive, wherein the microencapsulated flame retardant is prepared from a silica gel coated intumescent flame retardant, and the microencapsulated synergistic flame retardant is prepared from silica gel coated synergistic flame retardant. The fireproof coating is high in fire endurance and excellent in durability and water resistance;the effective fireproof material and flame retardant compositions of the fireproof coating loss slowly along with external environmental factors; the effective fireproof service life is long; the fireproof flame retarding effect is good; and the fireproof coating is particularly suitable for an outdoor steel structural building.

Description

Technical field [0001] The present invention belongs to the art of aqueous coating of steel structure, and more particularly to an ultra-thin expansion steel structure aqueous fire-resistant fire-resistant coating, and also relates to a method of preparing an ultra-thin expansion steel structure aqueous fire-resistant fire coating. Background technique [0002] The steel structure is a structure consisting of a member of a member such as steel material such as steel material such as steel, steel plate, and the like. It has high material strength, light weight, excellent in seismic performance, low base cost, short construction period. Advantages, widely used in large span buildings, super high-rise buildings, ordinary homes, office buildings and public facilities; Be the mainstream of building materials. However, the steel structure itself has a disadvantage of poor fire prevention and corrosion resistance, and its mechanical strength will fall rapidly at high temperatures. In th...

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Problems solved by technology

[0005] At present, water-based fireproof coatings for steel structures are developing rapidly, but there are many problems in the process of water-based coatings, such as water-based coatings generally have poor water resistance and durability, which is particularly prominent in the technical field of intumescent steel structure fireproof coatings The reason is that building steel structures are usually exposed to the outdoor atmosphere. After long-term wind and sun and the temperature difference between day and night, the surface coating film is easy to wrinkle and crack, and then penetrated by rain and snow, and moisture or humid air penetrates into the coating. Internally, the water-soluble components in the paint and the components with poor compatibility with the resin matrix are easy to migrate out with water and lose, thus greatly reducing the effective performance of the coating film, such as the key components in the intumescent flame retardant system such as acid source and carbon source Excessive loss of air source, etc., will lead to the failure of the fire protection of the coating film. Once a fire occurs, it will cause serious consequences

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