Self-cleaning and fireproof multifunctional coating for steel structure and preparation method of self-cleaning and fireproof multifunctional coating

Abstract

The invention discloses a self-cleaning and fireproof multifunctional coating for a steel structure and a preparation method of the self-cleaning and fireproof multifunctional coating. The multifunctional coating comprises a component A and a component B, wherein the component B comprises a curing agent, and the component A comprises the following components: in parts by mass, 30-40 parts of silicone-modified waterborne polyurethane resin, 3-8 parts of modified nano titanium dioxide, 5-10 parts of a hydroxide inorganic flame retardant and 25-40 parts of an intumescent flame retardant. The silicone-modified waterborne polyurethane resin is adopted as a film-forming substrate, the advantages of silicone and polyurethane can be achieved at the same time, and good heat resistance and mechanical properties are exhibited; and meanwhile the modified nano titanium dioxide is added to the formula, the hydrophobicity of the coating is increased, the self-cleaning ability is improved, and the coating has both functions of fire proofing and self-cleaning.

Description

technical field [0001] The invention relates to a coating for steel structures, in particular to a self-cleaning and fireproof multifunctional coating for steel structures and a preparation method thereof. Background technique [0002] In recent years, steel structures have been widely used in the construction industry due to their advantages of high strength, light weight, good extensibility, earthquake resistance, and short construction period. However, at an ambient temperature exceeding 600°C, the fire resistance limit of unprotected ordinary construction steel is about 10 minutes, which does not meet the requirements of fire safety regulations. Therefore, the fire protection of steel structures is extremely important. [0003] With the acceleration of industrialization, the problem of environmental pollution is increasing day by day, among which dust and gas pollution are particularly serious, causing problems such as unsightly steel structure materials, increased self...

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Problems solved by technology

[0003] With the acceleration of industrialization, the problem of environmental pollution is increasing day by day, among which dust and gas pollution are particularly serious, causing problems such as unsightly steel structure materials, increased self-weight, and potential safety hazards, and outdoor steel structure materials are generally tall and difficult to clean Therefore, there is a great market for developing a coating that only needs to be washed with water, or the steel structure can be renewed immediately as long as it rains.

[0004] At present, steel structure coatings can only achieve single functions such as fire protection or self-cleaning, but with the rapid development of industry, we have put forward higher requirements for steel structure materials. In order to meet the multi-level needs of steel structure materials, we have developed a kind of Multifunctional coatings capable of fire prevention and self-cleaning will have great market prospects

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