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Intumescent fire-retardant coating for steel structure

A technology for fire-resistant coatings and section steel, which is applied in fire-resistant coatings, anti-fouling/underwater coatings, coatings, etc., and can solve problems such as poor adhesion to metal substrates, small adhesion restrictions, and loss of protection of steel structures by fire-resistant coatings, etc. problems, to achieve the effect of excellent fire resistance, high strength, and uniform foaming

Inactive Publication Date: 2017-05-31
合肥英索莱特新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual ratio, it is found that expandable graphite and Mg(OH) 2 When the proportion is not good, the expandable graphite is less restricted by the adhesion of the system when it is heated and expanded, and it is easy to separate from the fireproof coating system during the expansion process, resulting in the "worm"-shaped carbon body formed by the expanded graphite and the metal substrate. Poor, the fire retardant coating loses its protective effect on the steel structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1: A kind of intumescent steel structure fireproof coating, the raw material according to weight percentage comprises: acrylic resin 23%, melamine polyphosphate 12%, pentaerythritol 13%, melamine 13%, nano-expandable graphite 6.5%, carbon fiber 15%, Nano Mg(OH) 2 2.5%, nano-TiO 2 8%, co-solvent 7%.

[0009] With the above ratio, the nano-expandable graphite is interspersed in the carbonaceous layer, which acts as a reinforcement similar to fiber materials, so that the viscosity of the molten system becomes larger, the foaming is more uniform, and the system obtains higher strength after charcoal solidification. The fire resistance of the paint increases rapidly, adding Mg(OH) 2 , the fire resistance limit of the coating is improved compared with the single addition of expandable graphite, and the combination of nano-expandable graphite and nano-Mg(OH) 2 The synergistic effect of particles, the so-called synergistic effect refers to the synergistic effect, ...

Embodiment 2

[0010] Embodiment 2: a kind of intumescent steel structure fireproof coating, the raw material according to weight percentage comprises: acrylic resin 26%, melamine polyphosphate 13%, pentaerythritol 12%, melamine 12%, nano-expandable graphite 6%, carbon fiber 16%, Nano Mg(OH) 2 2%, nano-TiO 2 7%, co-solvent 6%.

[0011] The paint obtained according to the above ratio has good foaming, dense carbon layer and high strength. The steel structure is coated with a dry coating thickness of 2 mm, which can withstand high temperatures of 700 ° C. The fire resistance limit reaches 100 minutes and the film layer is relatively flat. Excellent fire resistance.

Embodiment 3

[0012] Embodiment 3: a kind of intumescent steel structure fireproof coating, the raw material according to weight percentage comprises: acrylic resin 26%, melamine polyphosphate 12%, pentaerythritol 13%, melamine 12%, nano expandable graphite 7%, carbon fiber 15%, Nano Mg(OH) 2 2%, nano-TiO 2 7%, co-solvent 6%.

[0013] The paint obtained according to the above ratio has good foaming, dense carbon layer and high strength. The steel structure is coated with a dry coating thickness of 2 mm, which can withstand high temperatures of 700 ° C. The fire resistance limit reaches 100 minutes and the film layer is relatively flat. Excellent fire resistance.

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Abstract

The invention relates to intumescent fire-retardant coating for a steel structure. The intumescent fire-retardant coating for the steel structure comprises the following raw materials in percent by weight: 20-30% of acrylic resin, 10-15% of tripolycyanamide polyphosphate, 10-15% of pentaerythritol, 10-15% of tripolycyanamide, 5-7.5% of expandable nanographite, 12-18% of carbon fiber, 21.5-3% of nanometer Mg(OH), 6-10% of nanometer TiO2 and 5-8% of a cosolvent. The obtained coating is strong in adhesion to the steel structure, so that the fire resistance of the coating is ensured.

Description

technical field [0001] The invention belongs to the technical field of chemical coatings, and in particular relates to an intumescent fireproof coating for steel structures. Background technique [0002] Although the steel structure building material itself is not combustible, its mechanical properties will decrease with the increase of temperature under the high temperature of fire. When the temperature reaches 600°C, the steel structure basically loses all its strength and stiffness. However, the temperature of a general fire scene can reach 800-1000°C. At such a high temperature, the exposed steel structure will quickly undergo plastic deformation, causing the overall steel structure building to lose its bearing capacity and collapse within a short period of time (about 15 minutes). . Therefore, steel structure buildings must take some corresponding fire prevention measures to improve their fire resistance limit and meet the requirements of the fire protection design co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D5/18C09D5/16C09D7/12
CPCC09D133/00C08K3/22C08K5/053C08K7/06C08K7/24C08K13/04C08K2003/2224C08K2003/2241C08K2201/011C09D5/1687C09D5/185
Inventor 倪世宏王华林
Owner 合肥英索莱特新材料科技有限公司
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