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Preparation method of composite waterproof coating for tunnel

A fire retardant coating and composite technology, applied in the field of architectural coatings, can solve the problems of not taking into account the decorative performance, the variety of construction units, the generation of toxic and harmful gases, etc. Effect

Inactive Publication Date: 2020-02-14
泉州市派腾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

Tunnel fireproof coatings are generally non-intumescent fireproof coatings. The heat insulation and flame retardancy of the coating generally depends on the thickness of the coating itself. Generally, the coating thickness of the coating is about 20-30 mm; Add steel wire mesh for protection, thus increasing the difficulty of construction and affecting the construction period
In case of fire, the coating emits thick smoke, produces toxic and harmful gases, pollutes the environment, and endangers human safety; (5) Poor decoration
Almost all tunnel fire protection coatings do not consider decorative performance
(6) The market is not standardized
At present, the development of the tunnel fireproof coating market is not sound enough, unfair competition occurs from time to time, product quality is difficult to guarantee, and various construction units are diverse, it is difficult to meet the construction level required by the specification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In parts by weight, weigh 30 parts of magnesium sulfate hexahydrate, 12 parts of sodium hydroxide, and 300 parts of deionized water respectively, add magnesium sulfate hexahydrate to 1 / 2 parts by weight of deionized water, Stir at a rotating speed for 10min to obtain a magnesium sulfate solution, add sodium hydroxide to the remaining 1 / 2 weight part of deionized water, stir at a speed of 160r / min for 10min at room temperature, obtain a sodium hydroxide solution, and dissolve the magnesium sulfate solution at a rate of 8mL / min Slowly add it dropwise to the sodium hydroxide solution, stir at a speed of 300r / min in a water bath at 60°C for 1h, cool at room temperature, filter, take the filter cake, wash it with deionized water for 3 times, and place it in an air blast at 80°C Dry in a drying oven for 1 hour, cool at room temperature, grind, and pass through a 200-mesh sieve to obtain superfine magnesium hydroxide powder;

[0031] In parts by weight, weigh 30 parts of ethyl o...

Embodiment 2

[0034] In parts by weight, weigh 35 parts of magnesium sulfate hexahydrate, 14 parts of sodium hydroxide, and 350 parts of deionized water respectively, add magnesium sulfate hexahydrate to 1 / 2 parts by weight of deionized water, Stir at a rotating speed for 15min to obtain a magnesium sulfate solution, add sodium hydroxide to the remaining 1 / 2 weight part of deionized water, stir at a speed of 180r / min for 15min at room temperature to obtain a sodium hydroxide solution, and dissolve the magnesium sulfate solution at a rate of 9mL / min Slowly add it dropwise to the sodium hydroxide solution, stir at 350r / min in a water bath at 70°C for 1.5h, cool at room temperature, filter, take the filter cake, wash it with deionized water 4 times, and place it in a drum at 90°C Dry in an air drying oven for 1.5h, cool at room temperature, grind, and pass through a 200-mesh sieve to obtain superfine magnesium hydroxide powder;

[0035] In parts by weight, weigh 35 parts of ethyl orthosilicate...

Embodiment 3

[0038] In terms of parts by weight, weigh 40 parts of magnesium sulfate hexahydrate, 16 parts of sodium hydroxide, and 400 parts of deionized water respectively, and add magnesium sulfate hexahydrate to 1 / 2 parts by weight of deionized water. Stir at a rotating speed for 20min to obtain a magnesium sulfate solution, add sodium hydroxide to the remaining 1 / 2 weight part of deionized water, stir at a speed of 200r / min for 20min at room temperature to obtain a sodium hydroxide solution, and dissolve the magnesium sulfate solution at a rate of 10mL / min Slowly add it dropwise to the sodium hydroxide solution, stir at 400r / min for 1-2 hours in a water bath at 80°C, cool at room temperature, filter, take the filter cake, wash it with deionized water for 3-5 times, and place it in 100 Dry in a blast drying oven at ℃ for 2 hours, cool at room temperature, grind, and pass through a 200-mesh sieve to obtain ultrafine magnesium hydroxide powder;

[0039] In parts by weight, weigh 40 parts...

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Abstract

The invention discloses composite fireproof coating for a tunnel. The composite fireproof coating for the tunnel is prepared by adding nano silica sol and ultrafine magnesium hydroxide powder, a largenumber of silicon hydroxyls exist on the surface of the silica sol and are easily bonded with certain groups in the coating, and the thermal stability of a coating film can be improved; due to the vacancy of coordination on the surfaces of sol particles, the coating has high surface activity, and has a certain adsorption effect on macroparticles such as pigments and filler, and pulverization of the coating film can be reduced; silica particles in the silica sol are dispersed to form a network structure of Si-O-Si, so that the properties such as air permeability and aging resistance of the coating film are improved; when heated and decomposed, an ultrafine magnesium hydroxide flame retardant releases moisture to absorb heat, the actual temperature of a flame on the surface of the coating film is decreased, and thus the speed of degradation of a polymer into low molecules is decreased; and the concentration of oxygen on the surface of the coating film can be decreased by uniformly-released water vapor, so that combustion on the surface of the coating film cannot be continued, and the fire resistance of the coating film can be improved.

Description

technical field [0001] The invention relates to a preparation method of a composite fireproof coating for tunnels, belonging to the technical field of architectural coatings. Background technique [0002] Tunnel fires are usually caused by the burning of combustible materials in vehicles, such as gasoline, tires, seats, polymer accessories and goods carried by vehicles, etc. In addition, tunnels are usually narrow and long, and the tunnel is approximately closed. When a fire occurs, the fire It has high strength, high temperature and rapid rise. In a tunnel fire, as the temperature continues to rise, the bound water in the concrete becomes steam and expands, generating pressure, causing the surface of the concrete to burst and collapse, and the side wall will also collapse. Loss of stability endangers the lives of firefighters, resulting in greater loss of life and property. In order to eliminate the serious disasters that may be caused by tunnel fires, effective measures m...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/06C04B22/06C04B111/28
CPCC04B14/062C04B22/066C04B28/04C04B2111/00508C04B2111/28C04B22/16C04B24/125C04B24/02C04B2103/302C04B24/42C04B24/085C04B22/002
Inventor 陈胜利杨浩泽
Owner 泉州市派腾新材料科技有限公司
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