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Waterborne ultra-thin steel structure fire retardant coating and preparation method thereof

A fire retardant coating, ultra-thin technology, applied in fire retardant coatings, coatings, etc., can solve the problems of easy separation of the carbonized layer from the steel, poor strength of the carbonized layer, and poor expansion effect of the fireproof coating.

Active Publication Date: 2012-12-26
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects in the prior art, optimize the selection of polymer emulsions that can be used for intumescent fireproof coatings, add fireproof fillers, provide a water-based ultra-thin steel structure fireproof coating with excellent fire resistance, and solve the problem of fireproof coatings in the combustion process. Problems such as poor expansion effect, easy detachment of carbonized layer from steel, poor strength of carbonized layer, etc.

Method used

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  • Waterborne ultra-thin steel structure fire retardant coating and preparation method thereof
  • Waterborne ultra-thin steel structure fire retardant coating and preparation method thereof
  • Waterborne ultra-thin steel structure fire retardant coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Acrylic polymer emulsion 250g, ammonium polyphosphate (polymerization degree 600) 250g, pentaerythritol 100g, melamine 50g, titanium dioxide (rutile titanium dioxide) 120g, sepiolite 20g, plasticizer (chlorinated paraffin) 60g, wetting and dispersing agent 12g (the mass ratio of wetting agent to dispersant is 1:2), coalescent (2,2,4-trimethyl-1,3-pentanediol-monomethyl acrylate) 10g, silicone Defoamer 2g, water 126g.

[0047] Specific preparation method: Disperse wetting and dispersing agent and 1g defoamer in water at a speed of 1000r / min for 20min, add acrylic polymer emulsion and mix evenly, then add ammonium polyphosphate, pentaerythritol, melamine, titanium dioxide and sepiolite Into the above liquid, disperse on a high-speed disperser at a speed of 2000r / rin for 15 minutes, and finally add plasticizer, film-forming aid, and 1g of defoamer, and stir evenly to obtain the product.

[0048] Fire-resistant performance test results: when the dry film thickness is 2.0mm...

Embodiment 2

[0050] Vinyl acetate-vinyl tertiary carbonate emulsion 400g, ammonium polyphosphate (polymerization degree 1000) 200g, pentaerythritol 50g, melamine 100g, titanium dioxide 50g, sepiolite 20g, scaly expandable graphite (80 mesh) 50g, plasticizer ( Chlorinated paraffin) 10g, wetting and dispersing agent 12g (the mass ratio of wetting agent to dispersing agent is 1:3), film-forming aid (dipropylene glycol methyl ether) 20g, mineral oil defoamer 3g, water 85g.

[0051] Preparation method: Disperse wetting agent, dispersant, and 1.5g defoamer in water at a speed of 1000r / min for 20min, add vinyl acetate-vinyl tertiary carbonate emulsion and mix evenly, then mix ammonium polyphosphate, pentaerythritol, melamine and titanium dioxide Add sepiolite and expandable graphite to the above solution, disperse on a high-speed disperser at a speed of 2000r / min for 20min, and finally add plasticizer, film-forming aid, and 1.5g defoamer and stir evenly to obtain a fire-resistant coating.

[0052...

Embodiment 3

[0054] Vinyl acetate-vinyl tertiary carbonate emulsion 200g, ammonium polyphosphate (polymerization degree 1000) 200g, pentaerythritol 150g, melamine 50g, titanium dioxide 50g, hydrotalcite 60g, fiber filler 50g, plasticizer (chlorinated paraffin) 80g, wet dispersion 12g of agent (the mass ratio of wetting agent to dispersant is 1:2) 40g of film-forming aid (of which 2,2,4-trimethyl-1,3-pentanediol-monomethyl acrylate and dipropylene glycol The mass ratio of methyl ether is 2:1), silicone defoamer 2g, water 106g.

[0055] Preparation method: disperse wetting agent, dispersant, 1g defoamer in water for 20min, then add vinyl acetate-vinyl tertiary carbonate emulsion and mix evenly, then add ammonium polyphosphate, pentaerythritol, melamine, titanium dioxide and hydrotalcite to the above Disperse the solution in a high-speed disperser at a speed of 2000r / min for 20 minutes, and finally add plasticizer, 1g of defoamer, and film-forming aid and stir evenly to obtain a fire-resistan...

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Abstract

Provided is a waterborne ultra-thin steel structure fire retardant coating and a preparation method thereof. The raw material ratio of the coating includes 15-50% by weight of polymer latex, 15-30% by weight of ammonium polyphosphate, 5-15% by weight of pentaerythritol, 3-10% by weight of cyanurtriamide, 5-12% by weight of titanium dioxide, 2-13% inorganic filler, 0-5% by weight of expansiveness graphite, 1-10% by weight of plasticizer, 0.4-1.5% by weight of wetting dispersant, 0.2-0.5% by weight of defoamer, 1-6% by weight of coalescing agents and 5-15% by weight of water, and total raw material ratio is 100%. A high-speed dispersion method or a grinding dispersion method is adopted in preparation of the coating. A coating layer of the fire retardant coating can form a carbonization layer which is good in foaming effect, small and uniform in air holes and high in expansion times when in heating. The final fire retardant performance of the coating is far higher than technical requirements of a national standard. The waterborne ultra-thin steel structure fire retardant coating is a waterborne coating product, is non-poisonous and odorless and environment-friendly, and can be coated in a mode of brushing or spraying or roller coating.

Description

technical field [0001] The invention relates to a preparation method of a fireproof coating, in particular to a water-based ultra-thin steel structure fireproof coating and a preparation method thereof. Background technique [0002] Steel structure has the characteristics of high strength, good toughness, and good earthquake resistance, so it is widely used in the construction field. However, the fire resistance of steel structures is very poor. Ordinary building steel will lose its static balance at around 540°C, and the fire scene temperature is usually above 700°C. Many building components lose their load capacity at high temperatures and cause buildings to collapse. Huge losses were caused to people's lives and properties. In this regard, people usually use concrete coating, thermal insulation clapboard coating, mineral fiber mixed with cement and spraying, and spraying of steel structure fireproof coating to protect the steel structure from fire. Among them, the appli...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D125/14C09D131/04C09D5/18
Inventor 夏正斌李清英范方强
Owner SOUTH CHINA UNIV OF TECH
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