Expanded graphite powder water-based tunnel fire retardant coating and using method

Abstract

The invention discloses an expanded graphite powder water-based fireproof coating for tunnels. The coating consists of the following components in parts by mass: 10-20 parts of instant gel powder; 30-35 parts of expanded graphite powder; and 5-10 parts of melamine ; 45-55 parts of aluminum tripolyphosphate. The present invention uses the characteristics of high temperature resistance, high expansion multiple and strong heat insulation effect of expanded graphite powder to improve the fire resistance limit of water-based tunnel fireproof coatings; utilizes the hydrophobicity of expanded graphite powder as a carbon source in fireproof coatings to replace the existing many The pentaerythritol in the coating can improve the water resistance of the coating film of the water-based tunnel fireproof coating; by utilizing the characteristics of the large specific surface of the expanded graphite powder and the aseptic growth environment, it overcomes the need to add a variety of additives to ensure the storage stability of the coating system. Utilizing the physical and chemical inertness of expanded graphite powder and the pores between the sheets, the resin liquid used as a binder is easy to penetrate the expanded graphite powder, and the expanded graphite powder is bonded together in the dry paint film to enhance the fire resistance and chemical resistance of the paint film. performance.

Description

Technical field [0001] The present invention relates to the field of fire retardant coatings, specifically disclosing an expanded graphite powder waterborne tunnel fire retardant coating and method of use thereof. Background [0002] With the continuous development of highways, tunnel fire accidents around the world are frequent, which has been widely valued by people. From the English Channel tunnel fire in 1996, the Mountain Tunnel Fire in Kitszftanho County, Salzburg, Austria in 2000, the Subway Tunnel Fire in South Korea in 2003 to the Zhenwushan Tunnel Fire on the Yuqian Expressway in China in 2004, and the Dabaoshan Tunnel Fire in the Southbound Dabaoshan Tunnel in the Shaoguan Section of the Beijing-Zhuhai Expressway in Guangdong Province in 2008, all caused huge casualties and property losses. Although the reinforced concrete components of the main building in the tunnel are non-combustible materials, but the tunnel fire has the characteristics of rapid increase in the su...

AI Technical Summary

Problems solved by technology

At present, the general technology of water-based tunnel fireproof coatings is to add defoamers, thickeners, film-forming aids, bactericides, anti-fungal agents, etc. to the emulsion. , ammonium polyphosphate flame retardant, etc. These are also hydrophilic organic chemical materials, which eventually lead to poor water resistance and unsatisfactory fire resistance of the paint film.

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