Indoor expansive type fireproof steel structure coating and preparation method thereof

Abstract

The invention discloses an indoor expansive type fireproof steel structure coating. The fireproof coating is prepared from raw materials as follows: 40-60 g / kg of a polyvinyl acetate emulsion, 1-2 g / kg of titanium dioxide, 1-2 g / kg of a polyethylenimin cross-linking agent, 0.5-1.0 g / kg of polyacrylic acid, 3-6 g / kg of aluminum silicate fibers, 3-6 g / kg of aluminum hydroxide, 2-3 g / kg of boron nitride powder, 6-8 g / kg of neodymium oxide composite zirconia ceramic powder, 10-20 g / kg of glycerin diphosphate melamine salt, 3-5 g / kg of a foaming agent, 0.2-0.5 g / kg of a modified organosilicon hydrophobic agent, 0.5-1 g / kg of a paint film mildew preventive, 6-12 g / kg of a dehydration catalyst, 3-4 g / kg of a carburizer and the balance of deionized water. The indoor expansive type fireproof steel structure coating has excellent antioxidant property and anti-aging property, the heat-insulating performance of a coating layer is effectively enhanced, an expanded carbon layer is not prone to cracking and falling off, and the defects of an existing indoor fireproof coating are effectively overcome.

Description

technical field

[0001] The invention relates to the field of functional coatings, in particular to an indoor expansion type fireproof steel structure coating and a preparation method thereof. Background technique

[0002] As a type of fire protection measures for steel structures, fire retardant coatings are one of the most convenient and effective measures. According to national standards, fire retardant coatings for steel structures can be divided into three types: thick coating type, thin coating type and ultra-thin type. Among them, the thickness of the thick-coated steel structure fireproof coating is generally between 8-50mm. It is a non-intumescent fireproof coating. It is mainly used in high-rise buildings and main load-bearing steel structures, and is not suitable for coating and protection of exposed steel structures; The thickness of the thin-coated steel structure fireproof coating is between 3-7mm. It is generally used on building steel structures that require a...

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