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Polyurethane waterproof coating material and preparation method thereof

A waterproof coating and water-based polyurethane technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of limited organic volatile emissions, harsh construction, high VOC, etc., and achieve superior waterproofness, easy construction, and low VOC Effect

Inactive Publication Date: 2020-11-10
上海三棵树防水技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to factors such as high VOC, flammability, and harsh construction, traditional solvent-based waterproof coatings have limitations when used in areas such as indoor homes, closed and small spaces, and wet substrates; Enhanced, the emission of volatile organic compounds (VOC) in traditional solvent-based polyurethane coatings is increasingly restricted

Method used

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  • Polyurethane waterproof coating material and preparation method thereof
  • Polyurethane waterproof coating material and preparation method thereof
  • Polyurethane waterproof coating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046]

[0047] Craftsmanship:

[0048] (1) Add water into the dispersing tank, add pH regulator and hydroxyethyl cellulose in sequence, control the rotation speed within the range of 300r / min, and continue to disperse for 10min;

[0049] (2) Slowly add water-based polyurethane emulsion, preservative, wetting and dispersing agent, defoamer, adjust the speed to 400r / min, and continue to disperse for 10 minutes;

[0050] (3) Increase the rotational speed to 900r / min, add titanium dioxide in batches, and continue to disperse for 20 minutes;

[0051] (4) Reduce the rotational speed to 800r / min, slowly add mica powder and barium sulfate in turn, and continue to disperse for 25 minutes;

[0052] (5) Add film-forming aids, antifreeze agents, and thickeners at a speed of 500r / min, and continue to disperse for 15 minutes until the liquid is a uniform, white mixture without particles.

Embodiment 2

[0054] A kind of waterborne polyurethane waterproof coating embodiment 2, its concrete raw material and weight proportion are as follows:

[0055]

[0056] Craftsmanship:

[0057] (1) Add water into the dispersion tank, add pH regulator and hydroxyethyl cellulose in sequence, control the rotation speed within the range of 400r / min, and continue to disperse for 10min;

[0058] (2) Slowly add water-based polyurethane emulsion, preservative, wetting and dispersing agent, defoamer, adjust the speed to 500r / min, and continue to disperse for 10 minutes;

[0059] (3) Increase the rotational speed to 950r / min, add titanium dioxide in batches, and continue to disperse for 15 minutes;

[0060] (4) Reduce the rotation speed to 750r / min, slowly add mica powder and barium sulfate in turn, and continue to disperse for 20 minutes;

[0061] (5) Add film-forming aids, antifreeze agents, and thickeners at a speed of 600r / min, and continue to disperse for 15 minutes until the liquid is a un...

Embodiment 3

[0063] A kind of water-based polyurethane waterproof coating invention embodiment 3, its concrete raw material and weight ratio are as follows:

[0064]

[0065] Craftsmanship:

[0066] First add water into the dispersion tank, then add the pH regulator and hydroxyethyl cellulose, and then disperse for 10 minutes at a rotation speed of 300r / min;

[0067] Then add water-based polyurethane emulsion, preservative, wetting and dispersing agent and defoamer, adjust the speed to 400r / min and disperse at this speed for 10min;

[0068] Then adjust the rotation speed to 900r / min, then add titanium dioxide in 2 times, and then continue to disperse for 20 minutes;

[0069] Then reduce the rotation speed to 800r / min, slowly add mica powder and barium sulfate in turn, and then continue to disperse for 25 minutes;

[0070] Finally, add film-forming aids, antifreeze agents and thickeners at a speed of 500r / min, and continue to disperse for 30 minutes.

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Abstract

The invention relates to a polyurethane waterproof coating material and a preparation method thereof. The polyurethane waterproof coating material is prepared from the following raw materials in partsby weight: 9.43-10.43 parts of water, 0.01-0.05 part of a PH regulator, 0.06-0.09 part of hydroxyethyl cellulose, 44-48 parts of waterborne polyurethane emulsion, 0.1-0.4 part of a preservative, 0.5-1 part of a wetting dispersant, 0.5-1 part of a defoaming agent, 2-8 parts of titanium dioxide, 2-8 parts of mica powder, 28.21-31.21 parts of barium sulfate, 0.2-0.6 part of a film forming aid, 0.8-1.1 parts of an antifreeze agent and 0.35-0.65 part of a thickener. The polyurethane waterproof coating material has the advantages of high strength and high toughness of the oil-based polyurethane waterproof coating material, simplifies the construction conditions, and has the properties of high strength, high toughness, low VOC, high environmental friendliness, easiness in construction and excellent waterproofness.

Description

technical field [0001] The invention relates to a polyurethane waterproof coating and a preparation method thereof, belonging to the field of building waterproof materials. Background technique [0002] Due to factors such as high VOC, flammability, and harsh construction, traditional solvent-based waterproof coatings have limitations when used in areas such as indoor homes, closed and small spaces, and wet substrates; Enhanced, the emission of volatile organic compounds (VOC) in traditional solvent-based polyurethane coatings is subject to increasingly stringent restrictions. Therefore it is particularly important to prepare a low-VOC and waterproof waterborne polyurethane coating. Contents of the invention [0003] The invention provides a polyurethane waterproof coating and a preparation method thereof. The polyurethane waterproof coating of the invention has low pollution and excellent waterproof performance. [0004] The present invention is realized through the fol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D7/61C09D7/20C09D7/65C09D7/63
CPCC08K2003/2241C08K2003/3045C09D175/08C09D7/20C09D7/61C09D7/63C09D7/65C08L1/284C08K13/02C08K3/22C08K3/34C08K3/30C08K5/06
Inventor 李生辉潘喜良陈建有林威卢宏
Owner 上海三棵树防水技术有限公司
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