Expansion type fire-retardant coating and preparation method thereof

Abstract

The invention discloses an expansion type fire-retardant coating. The fire-retardant coating includes, by mass, 3-10% of polysiloxane emulsion, 10-17% of base resin emulsion, 11-18% of a carbonizing agent, 20-30% of a flame-retardant foaming agent, 10-20% of a nitrogen-containing foaming agent, 0.3-0.6% of a pre foaming agent, equal to or less than 5% of an expansion agent, 0.2-0.4% of a defoamingagent, 0.5-1.5% of a wetting dispersant, 0.1-0.5% of a coalescing agent and 10-25% of a filler. The fire-retardant coating that can prolong the fire resistance time and improve the fireproof performance can be provided.

Description

technical field [0001] The present disclosure particularly relates to an intumescent fireproof coating and a preparation method thereof. Background technique [0002] In the construction industry, by coating the surface of flammable materials in buildings with fire-resistant coatings, the fire resistance of flammable materials can be effectively improved and the spread of flames can be slowed down. This type of fire retardant coating is sometimes also called flame retardant coating. In particular, the mechanical strength and mechanical properties of commonly used building materials such as steel will decrease with the increase of temperature, and they will easily lose their supporting ability, resulting in the collapse of the building. Therefore, fire protection for such materials can effectively prevent such materials from rapidly heating up in a fire and reduce their strength, and avoid the loss of supporting capacity and cause the building to collapse. [0003] Proposed...

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Problems solved by technology

[0004] However, although the fireproof coatings disclosed in the above-mentioned patent documents have improved the fireproof performance of steel structures, when a fire actually breaks out, the foam carbonized layer formed when such fireproof coatings burn has uneven foaming and is not compatible with the steel base. The shortcomings such as poor adhesion of the material lead to a short fire-resistant time and poor fire-proof performance of the fire-resistant coating.

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