Water-based fireproof coating for steel member and preparation method thereof

Abstract

The invention discloses a water-based fireproof coating for a steel member and a preparation method thereof, and relates to the technical field of fireproof coatings. The coating comprises the following components in parts by weight: 180-250 parts of a polyurethane modified acrylate emulsion, 30-38 parts of texanol, 20-30 parts of ammonium borate, 18-23 parts of expandable graphite, 22-28 parts ofsuperfine kaolin, 2-5 parts of a water-based dispersing agent, 2-5 parts of a water-based defoaming agent, 1-2 parts of a mildew preventive and a proper amount of deionized water. The water-based fireproof coating has the advantages of fewer components, lower cost and favorable comprehensive properties, and has favorable market application prospects.

Description

technical field [0001] The invention relates to the technical field of fireproof coatings, in particular to a water-based fireproof coating for steel components and a preparation method thereof. Background technique [0002] At present, most steel structure coatings are oil-based paints, which contain organic solvents. On the one hand, organic solvents are easy to volatilize, and most of the organic solvents are poisonous and harmful, and have adverse effects on the environment; on the other hand, resins and organic solvents in paints are organic Compounds, flammable, and some organic solvents are also explosive, all of which bring safety hazards to the environment where paint is used. [0003] Based on the consideration of safety and adapting to environmental protection, water-based fireproof coatings have appeared on the market. Chinese patent document CN109370336A discloses a water-based intumescent steel structure fireproof coating, which improves the thermal insulation...

AI Technical Summary

Problems solved by technology

Chinese patent document CN109370336A discloses a water-based intumescent steel structure fireproof coating, which improves the thermal insulation capacity of the initial foaming expansion of the coating by adding modified potassium titanate whiskers, but the above-mentioned modified potassium titanate whiskers are composed of potassium titanate Preparation of whiskers, nano-titanium dioxide and aluminate coupling agent, high cost

Chinese patent document CN104530890A discloses a water-based acrylate fireproof coating, which uses potato starch to replace a part of pentaerythritol, which reduces the production cost of the coating. Composite modified acrylate core-shell emulsion with methacrylic acid has good waterproof performance and adding antifungal agent DE to improve the mildew resistance of the coating, but when the atmosphere in which the coating is used contains corrosive substances, such as chloride ions , due to the strong penetrating ability of chloride ions, the starch will become mildewed over time, thereby forming fine mildew spots on the surface of the coating. That is to say, although the addition of the above-mentioned potato starch reduces the production cost of the coating, it also It will reduce the salt spray resistance of the coating itself

At the same time, the coatings disclosed in this document involve many components, which will lead to high raw material procurement and storage costs for large-scale production in factories.