Aqueous peelable coating and preparation method thereof

A water-based, coating technology, used in antifouling/underwater coatings, conductive coatings, amylose/amylopectin derivative coatings, etc., can solve problems such as environmental pollution and waste of resources, and achieve high film-forming strength and durability. Excellent antistatic properties and oil resistance

Inactive Publication Date: 2019-08-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Solvent-based peelable coatings have excellent properties such as high strength, high elongation, and corrosion resistance, and are now mainstream products. However, their disadvantage is that a large amount of organic solvents used in the film formation process evaporates, which not only causes waste of resources, but also seriously pollutes the environment.

Method used

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  • Aqueous peelable coating and preparation method thereof
  • Aqueous peelable coating and preparation method thereof
  • Aqueous peelable coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A preparation method of water-based peelable coating, comprising the steps of:

[0049] (1) Mix polyvinyl alcohol, modified amylose, plasticizer, polyether modified silicone, sucrose ester, hydroxyl silicone oil, leveling agent, thixotropic agent, substrate wetting agent, preservative and water, Obtain mixed liquor; The relation of each raw material component that uses described in embodiment 1 is shown in following table 1;

[0050] (2) Under the stirring state that the rotating speed is 60 rev / min, the mixed solution described in step (1) is heated up and heat-treated, the temperature of the heat treatment is 95° C., and the time of the heat treatment is 2 hours, and then the temperature is lowered to At room temperature, the water-based peelable coating was obtained. The film performance indicators of the water-based peelable coating prepared in Example 1 after film formation are shown in Table 2 below.

[0051] Table 1

[0052]

[0053]

[0054] Table 2

...

Embodiment 2

[0057] A preparation method of water-based peelable coating, comprising the steps of:

[0058] (1) Mix polyvinyl alcohol, modified amylose, plasticizer, polyether modified silicone, sucrose ester, hydroxyl silicone oil, leveling agent, thixotropic agent, substrate wetting agent, preservative and water, Obtain mixed solution; The relation of each raw material component that uses described in embodiment 2 is shown in following table 3;

[0059] (2) Under the stirring state that the rotating speed is 120 rev / min, the mixed solution described in step (1) is heated up, and heat-treated, the temperature of the heat-treatment is 98° C., and the time of the heat-treatment is 4 hours, and then the temperature is lowered to At room temperature, the water-based peelable coating was obtained. The film performance indicators of the water-based peelable coating prepared in Example 2 after film formation are shown in Table 4 below.

[0060] table 3

[0061]

[0062]

[0063] Table 4...

Embodiment 3

[0066] A preparation method of water-based peelable coating, comprising the steps of:

[0067] (1) Mix polyvinyl alcohol, modified amylose, plasticizer, polyether modified silicone, sucrose ester, hydroxyl silicone oil, leveling agent, thixotropic agent, substrate wetting agent, preservative and water, Obtain mixed liquor; The relation of each raw material component that embodiment 3 uses is shown in following table 5.

[0068] (2) Under the stirring state that the rotating speed is 100 rev / min, the mixed liquid described in step (1) is heated up, and heat-treated, the temperature of heat-treatment is 96 ℃, the time of heat-treatment is 2.5 hours, then cools down to At room temperature, the water-based peelable coating was obtained. The film performance indicators of the water-based peelable coating prepared in Example 3 after film formation are shown in Table 6 below.

[0069] table 5

[0070]

[0071] Table 6

[0072]

[0073]

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Abstract

The invention discloses an aqueous peelable coating and a preparation method thereof. Raw materials used in the preparation method comprise the following substances (in parts by weight): 100 parts ofpolyvinyl alcohol, 10-20 parts of a modified straight-chain starch, 15-35 parts of a plasticizer, 5-15 parts of polyether modified organic silicon, 0.3-1.0 part of sucrose ester, 0.2-0.5 part of hydroxyl silicone oil, 0.5-2.0 parts of a leveling agent, 1.0-3.0 parts of a thixotropic agent, 0.5-1.0 part of a substrate wetting agent, 0.3-1.0 part of a corrosion inhibitor and 400-600 parts of water.The preparation method comprises the following steps: metering the components, carrying out stirring and mixing in a container with heating, carrying out heating to 95-98 DEG C, carrying out stirring,dissolving and mixing for 2-4 hours, carrying out cooling to the room temperature, and carrying out packaging, so as to obtain the aqueous peelable coating. After being filmed, the coating disclosedby the invention is capable of preventing heavy oil pollution and static electricity, and a formed coating film is high in strength and easy to peel.

Description

technical field [0001] The invention relates to the field of paint preparation, in particular to a water-based peelable paint and a preparation method thereof. Background technique [0002] As a temporary protective coating with low adhesion and strong cohesion, the strippable coating has the advantages of convenient coating, easy film formation, anti-corrosion and corrosion resistance, pollution release and anti-friction. Its development began during World War II. With the development of polymer chemical technology and the increasing market demand, it emerged in Japan, the United States and some European countries in the 1970s and produced large-scale production. with application. It is mainly used in the temporary protection of aerospace devices, weaponry, large machinery, automobiles, high-quality optical lenses, etc., and the removal of radioactive isotope pollution on nuclear industry equipment. [0003] From the perspective of the mechanism of action of the strippabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D129/04C09D5/20C09D7/65C09D103/18C09D7/20C09D5/24C09D5/16
CPCC09D129/04C09D5/20C09D7/20C09D5/24C09D5/1668C09D5/1687C08L2205/035C08L3/18C08L83/04C08L83/12
Inventor 崔跃飞
Owner SOUTH CHINA UNIV OF TECH
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