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Low-temperature-resistant aqueous polyurethane coating

A water-based polyurethane, low temperature resistance technology, applied in the field of coatings, can solve the problems of film heat resistance, low temperature resistance, water resistance, solvent resistance and poor mechanical properties, achieve good hydrolysis resistance, increase low temperature resistance, The effect of good low temperature resistance

Inactive Publication Date: 2016-08-17
WUHU SHUANGBAO BUILDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of its molecular structure, the waterborne polyurethane prepared by traditional methods has disadvantages such as heat resistance, low temperature resistance, water resistance, solvent resistance, and poor mechanical properties. Therefore, it is necessary to provide a new coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A low-temperature-resistant water-based polyurethane coating, the raw materials of which include by weight: 70 parts of modified polyurethane emulsion, 20 parts of water, 3 parts of dodecyl alcohol ester, 15 parts of kaolin, 10 parts of titanium dioxide, sodium dodecylsulfonate 3 parts, polyacrylamide 1 part, polyoxyethylene polyoxypropylene pentaerythritol ether 0.07 part, polydimethylsiloxane 0.06 part, Span 60 0.07 part, wetting agent BYK-346 0.2 part, wetting agent Wet265 0.4 0.1 part of leveling agent, 0.3 part of polyvinylpyrrolidone, 0.2 part of polyethylene oxide, 0.1 part of antifungal agent;

[0023]Wherein, in the preparation process of the modified polyurethane emulsion, take 300 mesh clay, heat up to 130°C, keep warm for 2 hours, cool to room temperature, add 3-aminopropyltriethoxysilane ethanol aqueous solution with a mass fraction of 0.6wt%, Ultrasonic dispersion is uniform, nitrogen gas is introduced, the temperature is raised to 80°C, refluxed for 7 hou...

Embodiment 2

[0025] A low-temperature-resistant water-based polyurethane coating, the raw materials of which include by weight: 90 parts of modified polyurethane emulsion, 15 parts of water, 5 parts of dodecyl alcohol ester, 10 parts of kaolin, 12 parts of titanium dioxide, sodium dodecylsulfonate 2 parts, polyacrylamide 2 parts, polyoxyethylene polyoxypropylene pentaerythritol ether 0.05 parts, polydimethylsiloxane 0.08 parts, Span 60 0.05 parts, wetting agent BYK-346 0.3 parts, wetting agent Wet265 0.2 parts 0.3 part of leveling agent, 0.1 part of polyvinylpyrrolidone, 0.3 part of polyethylene oxide, 0.05 part of antifungal agent;

[0026] Wherein, in the preparation process of the modified polyurethane emulsion, take 400-mesh pottery clay, heat up to 110°C, keep warm for 3 hours, cool to room temperature, add 3-aminopropyltriethoxysilane ethanol aqueous solution with a mass fraction of 0.4wt%, Ultrasonic dispersion is uniform, nitrogen gas is introduced, the temperature is raised to 90 ...

Embodiment 3

[0028] A low-temperature-resistant water-based polyurethane coating, its raw materials include by weight: 75 parts of modified polyurethane emulsion, 18 parts of water, 3.5 parts of dodecyl alcohol ester, 14 parts of kaolin, 10.5 parts of titanium dioxide, sodium dodecylsulfonate 2.8 parts, polyacrylamide 1.3 parts, polyoxyethylene polyoxypropylene pentaerythritol ether 0.065 parts, polydimethylsiloxane 0.065 parts, Span 60 0.065 parts, wetting agent BYK-346 0.22 parts, wetting agent Wet265 0.35 parts 0.15 part of leveling agent, 0.25 part of polyvinylpyrrolidone, 0.23 part of polyethylene oxide, 0.08 part of antifungal agent;

[0029] Wherein, in the preparation process of the modified polyurethane emulsion, take 300 mesh clay, heat up to 125°C, keep warm for 2.2 hours, cool to room temperature, add 3-aminopropyltriethoxysilane ethanol aqueous solution with a mass fraction of 0.55wt% , ultrasonically disperse evenly, pass in nitrogen, heat up to 83°C, reflux for 6.8h, centrif...

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PUM

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Abstract

The invention discloses a low-temperature-resistant aqueous polyurethane coating which is prepared from, by weight, 70-90 parts of modified polyurethane emulsion, 15-20 parts of water, 3-5 parts of n-Dodecanol ester, 10-15 parts of kaolin, 10-12 parts of titanium dioxide, 2-3 parts of sodium dodecyl sulfate, 1-2 parts of polyacrylamide, 0.05-0.07 part of polyoxyethylene polyoxypropylene pentaerythritol ether, 0.06-0.08 part of polydimethylsiloxane, 0.05-0.07 part of Span60, 0.2-0.3 part of wetting agent BYK-346, 0.2-0.4 part of wetting agent Wet265, 0.1-0.3 part of flatting agent, 0.1-0.3 part of polyvinylpyrrolidone, 0.2-0.3 part of polyoxyethylene and 0.05-0.1 part of mildew preventive. The low-temperature-resistant aqueous polyurethane coating is resistant to high and low temperature, resistant to corrosion, good in sound insulation, good in water resistance and high in mechanical performance.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a low-temperature resistant water-based polyurethane coating. Background technique [0002] Due to its special structure, waterborne polyurethane has unique physical and chemical properties, such as adjustable softness and hardness, good wear resistance, strong adhesion, etc. Waterborne polyurethane coatings with high performance and low VOC content have been widely used. However, due to the limitation of molecular structure of the water-based polyurethane prepared by the traditional method, the film has disadvantages such as heat resistance, low temperature resistance, water resistance, solvent resistance, and poor mechanical properties. Therefore, it is necessary to provide a new coating. Contents of the invention [0003] Based on the technical problems in the background technology, the present invention proposes a low-temperature-resistant water-based polyurethane coating,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/08C09D7/12C09D5/14C09D5/08C08F283/00C08F220/14C08G18/75C08G18/69C08G18/67C08G18/34
CPCC09D151/08C08F283/008C08G18/348C08G18/672C08G18/69C08G18/755C08L2201/08C08L2205/035C09D5/08C09D5/14C09D5/18C09D7/62C09D7/63C08L33/26C08L83/04C08K13/06C08K9/06C08K3/346C08K2003/2241C08G18/6576C08F220/14
Inventor 胡昌悌
Owner WUHU SHUANGBAO BUILDING MATERIAL
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