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

A technology of expanded graphite and fireproof coatings, applied in fireproof coatings, epoxy resin coatings, coatings, etc., can solve the problems of fireproof coatings without anticorrosion function, accelerated corrosion of steel structures, and limited application of fireproofing, so as to improve hardness, Improve adhesion and improve peeling effect

Active Publication Date: 2013-04-17
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.
[000

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Step 1: Preparation of Modified Expandable Graphite

[0041] Add 50g polyethylene glycol monomethyl ether, 500ml dehydrated alcohol, 500ml deionized water in reactor, heat to 80 ℃ while stirring, after polyethylene glycol monomethyl ether dissolves, add 200g expandable graphite, Stir and disperse for 3 hours, filter, and dry at 60° C. for 12 hours to obtain polyethylene glycol monomethyl ether modified expandable graphite.

[0042] Step 2: 360g pentaerythritol, 90g dipentaerythritol, 600g high degree of polymerization ammonium polyphosphate, 200g melamine phosphate, 125g melamine cyanuric acid, 275g melamine, 50g titanium dioxide, 50g kaolin, 175g composite zinc phosphate, 120g basic magnesium sulfate whiskers , 30g of magnesium borate whiskers and 175g of the modified expandable graphite obtained in step 1 were added to 850g of deionized water, dispersed at high speed for about 30min, and then transferred to a three-roll mill (or ball mill or sand mill) for grinding, f...

Embodiment 2

[0047] Please refer to formula 2 in Table 2, increase the amount of fire retardant additives, relatively reduce the amount of pigments and fillers and composite zinc phosphate, the preparation method is the same as in Example 1, and the properties of the resulting fire retardant coating are shown in Example 2 in Table 3.

Embodiment 3

[0049] Please refer to formula 3 of table 2, relatively increase the consumption of expandable graphite and whisker, its preparation method is the same as embodiment 1, the performance of the obtained fireproof coating is shown in embodiment 3 of table 3.

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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...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D163/02C09D133/04C09D7/12C09D5/18
Inventor 戴李宗吴锦添罗伟昂潘尹银邱武辉高辉黄晓平
Owner XIAMEN UNIV
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