A kind of graphene modified fireproof coating and preparation method thereof

A graphene-modified, fire-resistant coating technology, applied in the direction of fire-resistant coatings, anti-corrosion coatings, anti-fouling/underwater coatings, etc., can solve the problems of limited application range, formula restrictions, and no description of stable dispersion of graphene, etc., to achieve mechanical Improved performance and tribological properties, high temperature crack prevention, improved frost resistance and chemical corrosion resistance

Active Publication Date: 2021-07-16
POLYROCKS TECH&RES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it does not explain how graphene ensures stable dispersion of graphene in the coating system
In addition, the coating system is limited by the formula, and graphene only plays a role in suppressing smoke, and its application range is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] A preparation method of graphene modified silica powder, comprising the following steps:

[0030] 1) After mixing the graphene oxide aqueous solution and silicon dioxide powder, they are put into a mixer and stirred to obtain a mixed slurry;

[0031] 2) Put the mixed slurry into a microwave reactor and irradiate with microwaves to obtain graphene-modified silica powder.

[0032] Preferably, in step 1) of the preparation method of graphene-modified silica powder, the mass ratio of graphene oxide and silica powder is (1-1.5): 1; further preferably, graphene-modified silica powder In step 1) of the powder preparation method, the mass ratio of graphene oxide and silicon dioxide powder is 1:1.

[0033] Preferably, in step 1) of the preparation method of graphene-modified silica powder, the particle size of the silica powder is 800 mesh to 2500 mesh; more preferably, step 1 of the preparation method of graphene-modified silica powder ), the particle size of the silica powde...

preparation Embodiment 1

[0056] 220g vinyl acetate-ethylene copolymer emulsion, 220g ammonium polyphosphate, 70g pentaerythritol, 60g melamine, 160g graphene modified silica powder, 10g titanium dioxide, 10g zinc borate, 10g zinc oxide, 4g dispersant, 2g defoaming agent Add bactericide, 2g bactericide, 2g thickener, 20g film-forming aid and 210g deionized water into the mixer, control the speed at 200rpm, and stir for 20min. After the stirring is completed, the mixed slurry is transferred to a ball milling tank, and ball milling is carried out with zirconia beads as the ball milling medium, and the ball milling time is 150 minutes. The slurry obtained after ball milling was dispersed with a high-speed shear emulsifier, the rotating speed was 2200 rpm, the stirring time was 40 min, and the graphene-modified fireproof coating of Example 1 was obtained by filtering.

preparation Embodiment 2

[0058] 220g vinyl acetate-ethylene copolymer emulsion, 220g ammonium polyphosphate, 70g pentaerythritol, 60g melamine, 100g graphene modified silica powder, 70g titanium dioxide, 10g zinc borate, 10g zinc oxide, 4g dispersant, 2g defoaming agent Add bactericide, 2g bactericide, 2g thickener, 20g film-forming aid and 210g deionized water into the mixer, control the speed at 200rpm, and stir for 20min. After the stirring is completed, the mixed slurry is transferred to a ball milling tank, and ball milling is carried out with zirconia beads as the ball milling medium, and the ball milling time is 150 minutes. The slurry obtained after ball milling was dispersed with a high-speed shear emulsifier, the rotating speed was 2200 rpm, the stirring time was 40 min, and the graphene-modified fireproof coating of Example 2 was obtained by filtration.

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Abstract

The invention discloses a graphene modified fireproof coating and a preparation method thereof. This graphene-modified fireproof coating is composed of the following raw materials: vinyl acetate-ethylene copolymer emulsion, ammonium polyphosphate, pentaerythritol, melamine, graphene-modified silica powder, titanium dioxide, additives, and the balance is water. At the same time, the invention discloses a preparation method of the graphene-modified silica powder. In addition, the invention also discloses a preparation method of the graphene-modified fireproof coating. In the fireproof coating of the present invention, not only graphene can be stably dispersed, but also because of the introduction of graphene, a two-dimensional material, it solves the problem of easy cracking after drying, poor water resistance, and low mechanical strength of the foamed heat insulation layer, which is easy to fall off. It also improves the density and regularity of the carbon layer, prevents the coating from cracking at high temperatures, and improves the fire prevention effect.

Description

technical field [0001] The invention relates to a graphene modified fireproof coating and a preparation method thereof. Background technique [0002] The fire retardant coating is a special functional coating that is coated on the surface of the substrate. When a fire occurs, it can prevent the spread of the flame, retard the rapid spread of the fire, and protect the structure inside the coating from damage. Fireproof coatings have been widely used in various steel structures, aircraft, vehicles, buildings and cultural relics protection. [0003] At present, the fire retardant coatings in the world mainly include two categories: one is the non-intumescent fire retardant coating, which uses its own high flame retardancy or non-combustibility to achieve the purpose of fire prevention. This type of coating often has better fire resistance and water resistance, but The heat insulation is not good, and the fire performance is not high. The other type is intumescent fireproof co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D131/04C09D5/14C09D5/08C09D5/18C09D7/61C09D7/62C09D7/63
CPCC08K2003/2241C08K2003/2296C08K2003/323C09D5/084C09D5/14C09D5/185C09D131/04C09D7/61C09D7/62C09D7/63C08K13/06C08K9/02C08K9/00C08K3/36C08K3/32C08K5/34922C08K3/22
Inventor 梁亚涛翟勇强李桂林朱红芳
Owner POLYROCKS TECH&RES CO LTD
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