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Graphene oxide modified aqueous fireproof coating material, and preparation method thereof

A graphene-modified, fire-resistant coating technology, applied in fire-resistant coatings, coatings, etc., can solve the problems of smoke suppression effect to be improved, poor compatibility of fire-resistant coatings, etc., to achieve high added value, easy operation, and convenient construction Effect

Inactive Publication Date: 2020-01-17
QINGDAO AIR NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the compatibility of existing fire retardant coatings with other base materials is poor, and the smoke suppression effect needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The preparation method of a kind of graphene oxide modified water-based fireproof coating provided by the present invention comprises the following steps: the following mass parts: 20-40 parts of graphene oxide modified acrylic emulsion, 30-60 parts of expansion type fireproof coating Combustion agent, 0.1-10 parts of first neutralizing agent, 2-20 parts of co-solvent, 0.1-10 parts of dispersant, 0.1-10 parts of wetting agent, 10-20 parts of pigment and filler are mixed and stirred to obtain graphene oxide modified water-based fire retardant coating.

[0031] Wherein: the graphene oxide modified acrylic acid emulsion is prepared by the following method:

[0032] Step S110: Under the condition of an ice-water bath, under the condition that the temperature does not exceed 20°C, stir the concentrated sulfuric acid, graphite, solid sodium nitrate and potassium permanganate to react, then raise the temperature to 35°C, keep stirring, and add an appropriate amount of deionize...

Embodiment 1

[0044] A: Preparation of graphene-modified acrylic emulsion

[0045] (1) Under ice-water bath, add appropriate amount of concentrated sulfuric acid into the reaction kettle, while stirring, add 2g.L-1 graphite and 1g.L-1 sodium nitrate solid successively, then add 6g.L-1 potassium permanganate respectively, Under the condition that the temperature does not exceed 20°C, stir for a period of time, then heat up to about 35°C, continue to stir for 30 minutes, slowly add an appropriate amount of deionized water, stir for 20 minutes, add a small amount of hydrogen peroxide to reduce the residual oxidant, and the obtained solvent is bright yellow.

[0046] (2) Filter the solvent while it is hot, wash it with 5% HCl solution and deionized water successively until no sulfate radical is detected in the filtrate, and fully dry the filter cake in a vacuum oven at 60°C to obtain Graphene oxide, preserved for later use.

[0047] (3) Add 10 parts of methyl methacrylate, 10 parts of butyl ac...

Embodiment 2

[0056] A: Preparation of graphene-modified acrylic emulsion

[0057] (1) Under the ice-water bath, add appropriate amount of concentrated sulfuric acid in the reaction kettle, add 6g.L-1 graphite and 3g.L-1 sodium nitrate solid successively while stirring, then add 6g.L-1 potassium permanganate respectively, Under the condition that the temperature does not exceed 20°C, stir for a period of time, then heat up to about 35°C, continue to stir for 30 minutes, slowly add an appropriate amount of deionized water, stir for 20 minutes, add a small amount of hydrogen peroxide to reduce the residual oxidant, and the obtained solvent is bright yellow.

[0058] (2) Filter the solvent while it is hot, wash it with 5% HCl solution and deionized water successively until no sulfate radical is detected in the filtrate, and fully dry the filter cake in a vacuum oven at 60°C to obtain Graphene oxide, preserved for later use.

[0059] (3) Add 50 parts of methyl methacrylate, 40 parts of butyl a...

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Abstract

The invention provides a graphene oxide modified aqueous fireproof coating material, which comprises, by mass, 20-40 parts of graphene oxide modified acrylic emulsion, 30-60 parts of intumescent flameretardant, 0.1-10 parts of a first neutralizer, 2-20 parts of a cosolvent, 0.1-10 parts of a dispersing agent, 0.1-10 parts of a wetting agent and 10-20 parts of a pigment filler. According to the invention, the preparation method of the graphene oxide modified aqueous fireproof coating material is different from physical modification, wherein the graphene is added into the acrylic emulsion in achemical connection manner and is applied to preparation of the coating material, so that and the dispersity of the graphene in the aqueous fireproof coating material system and the compatibility of the graphene with other base materials can be improved; and the graphene with the sheet-like structure can enhance the strength of the carbon layer after the coating is combusted, so that the purposesof flame retardance and smoke suppression are achieved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a graphene oxide modified water-based fireproof coating and a preparation method thereof. Background technique [0002] Fire retardant paint is to brush the paint on the surface of flammable materials, which can usually play a certain decorative role. Once a fire occurs, it can slow down the speed of flame spread and prevent burning within a certain period of time, so as to protect the substrate and make people burn again. Sufficient time to leave the fire and organize rescue purposes. The fire prevention principle of fire retardant coatings can be roughly summarized into the following five points: (1) The fire retardant coating itself is flame retardant or non-combustible, so that the protected substrate is not directly in contact with the air, delaying the ignition of objects and reducing the burning speed; (2) In addition to being flame retardant or non-combustible, the fire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/12C09D5/18
CPCC09D5/185C09D133/12C08K13/06C08K9/08C08K3/042
Inventor 郭焱常海燕周莲洁苏坤李永岗
Owner QINGDAO AIR NEW MATERIALS
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