Ultra-thin fireproof coating for steel structure and application of ultra-thin fireproof coating

Abstract

The invention provides an ultra-thin fireproof coating for a steel structure. The fireproof coating comprises a component A and a component B. The component A comprises the following materials in parts by weight: 30-58 parts of organosilicon epoxy hybrid resin; 4-8 parts of liquid petroleum resin; 5-10 parts of a flame retardant; 5-10 parts of a carbon forming agent; 5-10 parts of a carbon formingcatalyst; 5-10 parts of a foaming agent; 3.0-6.0 parts of an active diluent; 6-10 parts of a filler; 5-10 parts of an antirust agent; 0.8-3.5 parts of an auxiliary agent; and 2-5 parts of refractoryfibers. The component B comprises triethoxyaminosilane and polyoxypropylene diamine in a weight ratio of (2-5): 1. Compared with a traditional epoxy fireproof coating, the fireproof coating disclosedby the invention is more suitable for steel structure coating construction needing both fire prevention and corrosion prevention, has excellent adhesive force, cracking resistance and weather resistance, and does not crack or fall off in a high-low temperature alternating environment.

Description

technical field [0001] The invention relates to the technical field of fireproof coatings, in particular, the invention relates to an ultra-thin fireproof coating which can be used for steel structural parts, as well as its preparation method and application. Background technique [0002] At present, the intumescent fireproof coatings for hydrocarbon flames are generally epoxy fireproof coatings. This kind of coating has good mechanical properties, but it often has the defect that the formed fireproof coating is easy to crack and fall off, especially when the film thickness is relatively thick. This is especially true under the conditions of large ambient temperature differences. The main reason for this phenomenon is: the hardened coating is thick, the paint film is hard and brittle, when the internal stress of the paint film is greater than the cohesion, the paint film will crack; and when the internal stress of the paint film is greater than the adhesion, the paint film w...

AI Technical Summary

Problems solved by technology

[0004] In recent years, my country's large-scale railway station buildings, platform canopies and other facilities have been put into use in large quantities. With the extension of the service life, some of the platform canopy columns have begun to have fire-resistant coating peeling off, which is poor in appearance and has potential safety hazards. Therefore, It is necessary to develop a fireproof coating suitable for the steel structure canopy column of the railway platform

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