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Waterborne polyurethane elastic coating with waterproof function, and preparation method thereof

A water-based polyurethane and elastic coating technology, applied in the field of coatings, can solve the problems of poor corrosion resistance, erosion, general wall adhesion, etc., and achieve the effect of high elongation

Inactive Publication Date: 2021-12-17
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

[0003] At the same time, due to the complex environment in which the exterior wall is located, it is not only exposed to ultraviolet rays, but also eroded by rainwater.
Although traditional exterior wall elastic coating has a certain waterproof function, its corrosion resistance is poor, and its adhesion on the wall is average. If the rainwater erosion time is too long, the insulation layer and base layer of the entire exterior wall will be damaged. will be affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] A kind of preparation method with waterproof functional waterborne polyurethane elastic coating, this preparation method comprises the following steps:

[0023] Step S1, add water into the mixer, add pH adjuster and hydroxyethyl cellulose in sequence, control the speed of the mixer at 300-450r / min, and continue to disperse for 7-10min;

[0024] Step S2, add preservative, wetting and dispersing agent, defoamer and ethylene glycol butyl ether in sequence, adjust the speed of the agitator to 350-450r / min, and continue to disperse for 4-8min;

[0025] Step S3, adding titanium dioxide, modified barium sulfate, calcium carbonate, heavy calcium powder and nano fillers, adjusting the speed of the agitator to 1000-1500r / min, and continuing to disperse for 15-20min;

[0026] Step S4, keep the speed of the agitator at 500-650r / min, slowly add polyurethane emulsion, and continue to disperse for 3-5min;

[0027] Step S5. Reduce the speed of the agitator to 450-500r / min, add antifre...

specific Embodiment 1

[0029] A water-based polyurethane elastic coating with waterproof function. The components of the elastic coating and the contents of each component are: 6% water, 0.1% pH regulator, 0.1% hydroxyethyl cellulose, 0.1% preservative, wet and disperse Agent 1%, defoamer 0.5%, titanium dioxide 17%, heavy calcium powder 6%, nano filler 3%, modified barium sulfate 4%, calcium carbonate 14%, polyurethane emulsion 44%, butyl glycol ether 0.7% , UV absorber 0.4%, nano silicon waterproofing agent 0.7%, leveling agent 1%, antifreeze 1.3%, thickener 0.1%.

[0030] A kind of preparation method with waterproof functional waterborne polyurethane elastic coating, this preparation method comprises the following steps:

[0031] Step S1, add water to the mixer, add pH modifier and hydroxyethyl cellulose in sequence, control the speed of the mixer at 450r / min, and continue to disperse for 8 minutes;

[0032] Step S2, add preservative, wetting and dispersing agent, defoamer and ethylene glycol but...

specific Embodiment 2

[0037] A water-based polyurethane elastic coating with waterproof function, the components of the elastic coating and the contents of each component are: 10% water, 0.2% pH regulator, 0.2% hydroxyethyl cellulose, 0.1% preservative, wet and disperse Agent 0.7%, defoamer 0.3%, titanium dioxide 16%, heavy calcium powder 5%, nano filler 5%, modified barium sulfate 4%, calcium carbonate 14%, polyurethane emulsion 40%, butyl glycol ether 0.5% , UV absorber 1%, nano silicon waterproofing agent 0.4%, leveling agent 1.3%, antifreeze 1.25%, thickener 0.05%.

[0038] A kind of preparation method with waterproof functional waterborne polyurethane elastic coating, this preparation method comprises the following steps:

[0039] Step S1, add water into the mixer, add pH regulator and hydroxyethyl cellulose in sequence, control the speed of the mixer at 300r / min, and continue to disperse for 10min;

[0040] Step S2, add preservative, wetting and dispersing agent, defoamer and ethylene glycol...

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Abstract

The invention discloses a waterborne polyurethane elastic coating with a waterproof function. The elastic coating is prepared from, by weight, 6 to 11 percent of water, 0.1 to 0.2 percent of a pH regulator, 0.05 to 0.4 percent of hydroxyethyl cellulose, 0.1 to 0.2 percent of a preservative, 0.7 to 1.2 percent of a wetting dispersant, 0.3 to 0.7 percent of a defoaming agent, 16 to 24 percent of titanium dioxide, 5 to 12 percent of heavy calcium powder, 3 to 6 percent of a nano filler, 4 to 8 percent of modified barium sulfate, 14 to 20 percent of calcium carbonate, 40 to 50 percent of a polyurethane emulsion, 0.4 to 1 percent of butyl cellosolve, 0.3 to 1.2 percent of an ultraviolet absorbent, 0.2 to 0.7 percent of a nano silicon waterproof agent, 0.1 to 1.3 percent of a leveling agent, 0.8 to 1.5 percent of an antifreeze agent and 0.05 to 0.4 percent of a thickening agent. The invention also discloses a preparation method of the waterborne polyurethane elastic coating with the waterproof function. The waterborne polyurethane elastic coating with the super waterproof function is developed by screening various polyurethane emulsions and auxiliaries and researching the dosage ratio, and the product not only has the characteristics of high strength, high elongation and water-based environment-friendly waterborne polyurethane elastic coating, but also has waterproof, ultraviolet-proof and low-temperature-resistant functions.

Description

technical field [0001] The invention relates to the technical field related to coatings, in particular to a water-based polyurethane elastic coating with waterproof function and a preparation method thereof. Background technique [0002] With the continuous advancement of the urbanization process, the urban population continues to increase, the urban residential density continues to increase, and the increase in high-rise buildings requires higher and higher requirements for building materials. At present, in order to increase the safety and aesthetics of high-rise residential buildings, it is often necessary to paint the exterior wall of the building. During the use of exterior wall paint, it will be exposed to ultraviolet rays for a long time, which is the most important thing between it and interior wall paint. point of difference. [0003] At the same time, because the environment of the exterior wall is very complicated, it is not only exposed to ultraviolet radiation,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/61C09D7/62C09D7/63
CPCC09D175/04C09D7/61C09D7/62C09D7/63C08K2003/3045C08K2003/265C08K2201/014C08K5/06C08K3/30C08K3/26
Inventor 韩哲兵林朋林昌庆叶正夫李生辉黄益洲
Owner 河北三棵树涂料有限公司