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A kind of water-based polyurethane coating for concrete protection in cold area and preparation method thereof

A water-based polyurethane technology in cold regions, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve problems that do not meet environmental conditions and environmental protection requirements, and achieve slowing down of natural weathering speed, low production costs, and brushing large area effect

Active Publication Date: 2020-11-20
铁科创恒新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solvent-based coatings in the prior art can meet performance requirements, but do not meet environmental conditions and environmental protection requirements

Method used

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  • A kind of water-based polyurethane coating for concrete protection in cold area and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of waterborne polyurethane coating that is used for concrete protection in cold area, its preparation method is as follows:

[0032] (1) Mix 8 parts of deionized water, 0.2 part of wetting agent, 0.6 part of dispersant, and 0.2 part of defoamer evenly to obtain a premix;

[0033] (2) Add 15 parts of titanium dioxide, 3.5 parts of mica powder, and 2.5 parts of talcum powder to the premix prepared in step (1), and after high-speed dispersion, grind with a horizontal sand mill to form a pigment slurry;

[0034] (3) Mix 50 parts of water-based polyurethane dispersion, 10 parts of water-based hydroxyacrylic resin, 5 parts of water-based high-solid amino acid ester resin, and 5 parts of water-based polytetrafluoroethylene emulsion, and stir to make a premixed base material;

[0035] (4) Put the premixed base material prepared in step (3) into the paint mixing kettle, add the pigment slurry prepared in step (2), add 0.2 parts of bactericide, 2 parts of cosolvent, 0.2 pa...

Embodiment 2

[0039] A kind of waterborne polyurethane coating that is used for concrete protection in cold area, its preparation method is as follows:

[0040] (1) Mix 10 parts of deionized water, 0.2 part of wetting agent, 0.8 part of dispersant, and 0.2 part of defoamer evenly to obtain a premixed liquid;

[0041] (2) Add 17.5 parts of titanium dioxide, 4 parts of sericite powder, and 2.5 parts of talcum powder to the premix prepared in step (1), and after high-speed dispersion, grind with a horizontal sand mill to form a pigment slurry;

[0042] (3) Mix 45 parts of water-based polyurethane dispersions, 8 parts of water-based hydroxyacrylic resins, 10 parts of water-based high-solid amino acid ester resins, and 5 parts of water-based polytetrafluoroethylene emulsions, and stir them evenly to make a premixed base material;

[0043] (4) Put the premixed base material prepared in step (3) into the paint mixing kettle, add the pigment paste prepared in step (2), add 0.2 parts of bactericide,...

Embodiment 3

[0047] A kind of waterborne polyurethane coating that is used for concrete protection in cold area, its preparation method is as follows:

[0048] (1) Mix 9 parts of deionized water, 0.2 part of wetting agent, 0.7 part of dispersant, and 0.2 part of defoamer evenly to obtain a premix;

[0049](2) Add 10 parts of titanium dioxide, 3.5 parts of sericite powder, and 5 parts of talcum powder to the premix prepared in step (1), and after high-speed dispersion, grind with a horizontal sand mill to form a pigment slurry;

[0050] (3) Mix 55 parts of water-based polyurethane dispersions, 5 parts of water-based hydroxyacrylic resins, 8 parts of water-based high-solid amino acid ester resins, and 5 parts of water-based polytetrafluoroethylene emulsions, and make a premixed base material after stirring;

[0051] (4) Put the premixed base material prepared in step (3) into the paint mixing kettle, add the pigment slurry prepared in step (2), add 0.2 parts of bactericide, 2 parts of cosolv...

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Abstract

The invention relates to a waterborne polyurethane coating for protection of concrete in cold areas and a preparation method thereof. The waterborne coating consists of a component A and a component B. The component A includes the components by weight: 40 to 70 parts of a waterborne polyurethane dispersion body, 0 to 20 parts of waterborne hydroxyl acrylic resin, 0 to 20 parts of waterborne polyurethane resin, 0 to 10 parts of a waterborne polytetrafluoroethylene emulsion, 0.1 to 8 parts of an auxiliary agent, 5 to 30 parts of pigments and fillers, and 7 to 10 parts of deionized water. The component B is a waterborne isocyanate curing agent with the addition amount of 10-15 parts. The waterborne polyurethane coating can be used normally at low temperature, can prevent concrete from occur water vapor erosion, freeze-thaw damage and other phenomena in cold climate, and slows down natural weathering speed.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a water-based polyurethane coating used for concrete protection in cold regions and a preparation method thereof. Background technique [0002] In Northeast my country, North China, Inner Mongolia, Qinghai, Xinjiang and other regions, the winter temperature is below -5°C, or even as low as -50°C. However, low temperature is very unfavorable for concrete in building materials, and most of them will freeze and thaw. Generally, external protective coatings are used to protect concrete, but the current protective environmental protection water-based coatings begin to fail when the temperature is lower than -20°C, and the coating itself will crack and peel off and cannot protect concrete at low temperatures. . [0003] At present, people use water-based latex paint to protect and decorate concrete in cold regions, and at the same time, it needs to meet environmental protec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D133/00C09D127/18C09D5/08C09D7/61
CPCC08K2003/2241C08L2201/08C08L2205/035C09D5/08C09D7/61C09D175/04C08L33/00C08L27/18C08K3/22C08K3/34C08K5/29
Inventor 王琦王建王姣吕万青章越
Owner 铁科创恒新材料科技有限公司
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