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High-performance intumescent sandwich-structure ultrathin fireproof anticorrosive composite coating for steel structures and preparation method thereof

A composite coating and fire-resistant coating technology, applied in anti-corrosion coatings, fire-resistant coatings, coatings, etc., can solve the problems of general fire resistance, lack of anti-corrosion performance, and fire site injury, etc., to increase surface strength and tortoise resistance. cracking performance, excellent synergistic flame retardant and smoke suppression effects, and the effect of reducing smoke generation and heat release

Active Publication Date: 2021-06-11
ZHEJIANG UNIV HANGZHOU GLOBAL SCI & TECH INNOVATION CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some problems in the use of intumescent steel structure fireproof coatings: (1) a large amount of toxic smoke will be released in case of fire, which will cause harm to those who have not escaped from the fire in time; (2) the stability is poor, and it is easy to degrade and fail due to water vapor erosion; ( 3) Cracking due to friction, vibration, and deflection, and short service life; (4) Poor fire resistance, loose charcoal layer after thermal expansion, low strength, easy to be broken by flames, loss of fire prevention effect, and a large amount of charcoal ash; (5) Some commonly used The flame retardant material has certain corrosion to steel, etc.
Although the patent uses a double-layer structure, the composition of the inner and outer layers is similar, and the expansion efficiency of the inner layer is low. At the same time, the toughness of the coating is poor, and the hardness, high temperature resistance and decoration of the outer layer are not ideal. The comprehensive fire resistance performance is average, and Does not have good anti-corrosion properties

Method used

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  • High-performance intumescent sandwich-structure ultrathin fireproof anticorrosive composite coating for steel structures and preparation method thereof
  • High-performance intumescent sandwich-structure ultrathin fireproof anticorrosive composite coating for steel structures and preparation method thereof
  • High-performance intumescent sandwich-structure ultrathin fireproof anticorrosive composite coating for steel structures and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0077] Step 1: Mix 5 parts of methyltrimethoxysilane, 5 parts of γ-(2,3-glycidoxy)propyltrimethoxysilane, 20 parts of methyltriethoxysilane siloxane, 0.3 parts of acetic acid Portions are mixed, stirring. Add 7 parts of propylene glycol butyl ether, dropwise add 40 parts of nano-silica sol, and stir. Then add 10 parts of titanium dioxide, 5 parts of aluminum oxide whiskers, and 5 parts of mica powder, grind and disperse with a ball mill, add leveling agent and defoamer after taking it out, and obtain silicone ceramic coating.

[0078] Step 2: compound ammonium polyphosphate, pentaerythritol, melamine and melamine borate in a mass ratio of 25:10:13:2 to prepare an intumescent flame retardant (IFR). Take 50 parts of IFR, add 10 parts of flame retardant MCA, 1 part of nano-silica sol, 60 parts of deionized water, 0.5 parts of wetting and dispersing agent, and 0.5 parts of leveling agent into a sand mill dispersing multipurpose machine and stir at high speed for 20 minutes. Add ...

Embodiment 2

[0083] Step 1: Mix 5 parts of methyltrimethoxysilane, 5 parts of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 25 parts of methyltriethoxysilanesilane, 0.3 parts of acetic acid Portions are mixed, stirring. Add 7 parts of propylene glycol butyl ether, dropwise add 40 parts of nano-silica sol, and stir. Then add 10 parts of titanium dioxide, 5 parts of aluminum oxide whiskers, and 5 parts of mica powder, grind and disperse with a ball mill, add leveling agent and defoamer after taking it out, and obtain silicone ceramic coating.

[0084]Step 2: Ammonium polyphosphate, pentaerythritol, melamine and melamine borate are compounded in a mass ratio of 25:10:13:2 to prepare an intumescent flame retardant (IFR). Take 50 parts of IFR, then add 15 parts of MCA, 1 part of nano-silica sol, 60 parts of deionized water, 1 part of wetting and dispersing agent, and 1 part of leveling agent into a sand mill dispersing multipurpose machine and stir at high speed for 20 minutes. Add 25 parts of ...

Embodiment 3

[0087] Step 1: Mix 5 parts of methyltrimethoxysilane, 5 parts of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 15 parts of methyltriethoxysilanesilane, 0.3 parts of acetic acid Portions are mixed, stirring. Add 3 parts of propylene glycol butyl ether, dropwise add 30 parts of nano-silica sol, and stir. Then add 10 parts of titanium dioxide, 2.5 parts of aluminum oxide whiskers, and 2.5 parts of mica powder, grind and disperse with a ball mill, add leveling agent and defoamer after taking it out, and obtain silicone ceramic coating.

[0088] Step 2: Ammonium polyphosphate, pentaerythritol, melamine and melamine borate are compounded in a mass ratio of 25:10:13:2 to prepare an intumescent flame retardant (IFR). Take 50 parts of IFR, then add 10 parts of MCA, 1 part of nano-silica sol, 60 parts of deionized water, 0.5 parts of wetting and dispersing agent, and 0.5 parts of leveling agent into the sand mill dispersing multipurpose machine and stir at high speed for 20 minutes. Add...

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Abstract

The invention discloses a high-performance intumescent sandwich-structure ultrathin fireproof anticorrosive composite coating for steel structures and a preparation method thereof. The composite coating is characterized in that organic silicon ceramic coatings are used as a bottom layer and a surface layer, intumescent fireproof coatings are used as middle layers, and the organic silicon ceramic coatings and the intumescent fireproof coatings are alternately arranged; the total number of the organic silicon ceramic coatings and the expansion fireproof coatings is at least three; and the multilayer structure is subjected to a polymer cross-linking reaction to form the composite coating with a sandwich structure. The composite coating provided by the invention has the advantages of ultra-thin and long fire-resistant effects, good hardness, wear resistance, weather resistance and decorativeness, relatively simple construction, and great application prospect and market potential.

Description

technical field [0001] The invention relates to the field of fireproof coatings, in particular to a high-performance expansion sandwich structure ultra-thin steel structure fireproof and anticorrosion composite coating and a preparation method thereof. Background technique [0002] Steel structure is a structure composed of steel materials, which is one of the main types of building structures. Because of its lighter weight than concrete and easy construction, it is widely used in large factories, venues, super high-rises and other fields. Due to the high thermal conductivity and rapid heat transfer of steel, the fire resistance limit of unprotected steel structures is generally about 15 minutes. Usually, when the temperature is above 450-650°C, the bearing capacity will be lost in a short period of time, and a large deformation will occur, resulting in Steel columns and beams bend and even the structure collapses. Therefore, in the event of a fire, the steel structure nee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D5/08C09D5/18C09D7/61C09D143/04B05D5/00B05D7/14B05D1/38
CPCC09D183/04C09D5/08C09D5/185C09D7/61C09D143/04C09D7/70B05D5/00B05D7/14B05D7/584B05D7/586C08K2003/2241C08K2003/323C08L2201/02C08L2201/08C08K3/36C08K3/22C08K7/08C08K3/34C08K3/32C08K5/053C08K5/34922C08K13/02
Inventor 赵骞江永波王忠元
Owner ZHEJIANG UNIV HANGZHOU GLOBAL SCI & TECH INNOVATION CENT
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