Water-based ultrathin expansion type formed steel construction fire retardant coating based on expansible graphite and crystal whisker system

Abstract

The invention discloses a coating for steel construction buildings and a preparation method thereof. The coating comprises the components in proportion ( by relative mass parts) as follows: 26-32 of film formation substances, 15-23 of a dehydration carbonizing catalyst, 8-15 of a carbonizing agent, 6-12 of a foaming agent, 2-5 of pigments and fillers, 2-5 of compound zinc phosphate, 1.5-5.5 of modified expansible graphite, 1.6-5.5 of crystal whisker, 0.9-1.2 of a film formation additive and 4.2-9.1 of a water-based curing agent. The expansible graphite and the crystal whisker system are utilized by the invention, the expansible graphite can greatly improve the expansion multiplying power of the water-based fire retardant coating and the strength of a crystal whicker strengthening carbon layer, the graphite flake falling is reduced, and thereby synergistically improving the fireproof performance.

Description

technical field [0001] The invention relates to a water-based fireproof coating, in particular to a water-based ultra-thin intumescent fireproof coating for steel structure buildings based on the synergistic effect of expandable graphite and whiskers and a preparation method thereof. Background technique [0002] The rapid economic and social development has promoted the continuous upgrading and replacement of building materials. Steel structures have the advantages of fast construction, energy saving and environmental protection, and high earthquake resistance. These unique advantages make steel structures widely used in the field of construction engineering, especially high-rise buildings. , light steel structure, large-span space structure, etc., have gradually replaced traditional reinforced concrete in the process of urbanization in the world and in my country, and have become the main architectural form. According to the requirements of my country's fire protection code...

AI Technical Summary

Problems solved by technology

[0005] 1) Adding expandable graphite as a foaming enhancer, the negative effect is that the strength of the carbon layer decreases, it is easy to peel off, and the graphite scales will fall off, which makes the fire resistance performance decrease

[0006] 2) Few literatures mention its modification. The problem is that the unmodified expandable graphite aggregates into agglomerates due to the van der Waals force, is unevenly dispersed, and easily settles in water, which limits its fire protection application.

[0007] 3) At the same time, it is rarely involved in the anti-corrosion of steel structures. For example, the weather in the south is humid and rainy, which makes the corrosion of steel structures faster, which makes the fire-resistant coating must have a certain anti-corrosion function

If a fire breaks out, the fire retardant coating does not have the anti-corrosion function, so that the steel structure has lost its proper fire resistance due to corrosion aging or other reasons, the consequences will be unimaginable

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