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Water-based polyurea composite modified single-component acrylic acid waterproof coating and preparation method thereof

A composite modification, waterproof coating technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of complex preparation method and increased cost, and achieve the effect of simple preparation method, low cost and reduced water absorption

Active Publication Date: 2021-10-22
河北三棵树涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its preparation method is relatively complicated, resulting in high cost

Method used

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  • Water-based polyurea composite modified single-component acrylic acid waterproof coating and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0040] The preparation method of water-based polyurea composite modified single-component acrylic waterproof coating, the steps are:

[0041] S1 ultrasonically disperse graphene powder with a layer number of 1 and a particle size of 12 μm in deionized water for 45 minutes to obtain a graphene aqueous dispersion;

[0042] S2 Add the graphene water-based dispersion liquid successively to dispersant, silicone defoamer, antifungal agent, under stirring speed 1000r / min, rutile type titanium dioxide, 800 mesh barium sulfate, 800 mesh heavy calcium carbonate, continue to stir for 35min;

[0043] In S3, add pure acrylic acid waterproof emulsion with a glass transition temperature of -20°C and water-based polyurea emulsion with a minimum film-forming temperature of 0°C in sequence, reduce the stirring speed to 600r / min, continue stirring for 30min, and let it stand to obtain a water-based polyurea composite modification. One-component acrylic waterproof coating;

[0044] In this embod...

Embodiment 2

[0046] The preparation method of water-based polyurea composite modified single-component acrylic waterproof coating, the steps are:

[0047] S1 ultrasonically disperse graphene powder with a particle size of 7 μm and 3 layers in deionized water for 60 minutes to obtain a graphene aqueous dispersion;

[0048] S2 adds dispersant, mineral oil defoamer, antifungal agent to graphene aqueous dispersion liquid successively, under stirring speed 800r / min, rutile type titanium dioxide, 800 order barium sulfate, 800 order mica powder, 1000 order talcum powder, Keep stirring for 25min;

[0049] In S3, add pure acrylic acid waterproof emulsion with a glass transition temperature of -20°C and water-based polyurea emulsion with a minimum film-forming temperature of 0°C in sequence, reduce the stirring speed to 500r / min, continue stirring for 25min, and let it stand to obtain a water-based polyurea composite modification. One-component acrylic waterproof coating;

[0050] In this embodime...

Embodiment 3

[0052] The preparation method of water-based polyurea composite modified single-component acrylic waterproof coating, the steps are:

[0053] S1 ultrasonically disperse graphene powder with 2 layers and a particle size of 10 μm in deionized water for 70 minutes to obtain a graphene aqueous dispersion;

[0054] S2 Add the graphene water-based dispersion liquid successively to dispersant, mineral oil defoamer, organic silicon defoamer, under stirring speed 900r / min, rutile type titanium dioxide, 800 mesh barium sulfate, 800 mesh heavy calcium carbonate, 800 mesh Mesh mica powder, 1000 mesh talcum powder, keep stirring for 30min;

[0055] In S3, add pure acrylic acid waterproof emulsion with a glass transition temperature of -20°C and water-based polyurea emulsion with a minimum film-forming temperature of 0°C in sequence, reduce the stirring speed to 400r / min, continue stirring for 35min, and let stand to obtain a water-based polyurea composite modification. One-component acrylic...

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Abstract

The invention relates to the technical field of waterproof coatings, in particular to a water-based polyurea composite modified single-component acrylic acid waterproof coating and a preparation method thereof. The method comprises the following steps: ultrasonically dispersing graphene in deionized water for 45-70 minutes to obtain a graphene water-based dispersion liquid; sequentially adding a dispersing agent, a defoaming agent and a mildew preventive into the graphene aqueous dispersion liquid, adding rutile titanium dioxide and an inorganic filler at a stirring speed of 800-1000r / min, and continuously stirring for 25-35 minutes; and sequentially adding the acrylic emulsion and the aqueous polyurea emulsion, reducing the stirring speed to 400-600r / min, continuously stirring for 25-35 minutes, and standing to obtain the aqueous polyurea composite modified single-component acrylic waterproof coating. The water-based polyurea emulsion is modified by the acrylic emulsion, and graphene and other ingredients are combined to play a synergistic effect, so that the mechanical property of the waterproof coating is greatly improved, and the problem of high water absorption rate of the waterproof coating is solved.

Description

technical field [0001] The invention relates to the technical field of waterproof coatings, in particular to a water-based polyurea composite modified single-component acrylic waterproof coating and a preparation method thereof. Background technique [0002] Water-based polyurea composite modified one-component acrylic waterproof coating has excellent film-forming properties and low water absorption, which can effectively deal with small gaps in the base layer and ensure the continuity of the waterproof layer. At the same time, it can have high bonding strength with the base surface to ensure that the product does not peel off or delaminate. [0003] The traditional conventional one-component acrylic waterproof coating is made of acrylic emulsion and inorganic filler as the main components, and mixed with functional additives. Due to the performance limitation of acrylic emulsion and the addition of more inorganic fillers, the material has low mechanical strength and high wa...

Claims

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Application Information

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IPC IPC(8): C09D133/04C09D175/02C09D7/61
CPCC09D133/04C09D7/61C08K2003/2241C08L75/02C08K3/042C08K3/22
Inventor 宋爽薛文军
Owner 河北三棵树涂料有限公司
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