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Anti-ultraviolet heat-resistant natural raw lacquer film and preparation method thereof

An anti-ultraviolet and natural technology, applied in the field of coatings, can solve problems such as poor anti-ultraviolet resistance, and achieve the effects of simple operation, improved anti-ultraviolet performance and heat resistance, and excellent anti-ultraviolet performance and heat resistance.

Inactive Publication Date: 2020-05-08
MINJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] According to one aspect of the present application, a natural raw lacquer film with UV-absorbing properties is provided, and the ultraviolet-absorbing characteristics of melanin particles are used to overcome the shortcomings of traditional natural raw lacquer with poor UV resistance, thereby obtaining a heat-resistant film with good UV resistance. natural lacquer film

Method used

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  • Anti-ultraviolet heat-resistant natural raw lacquer film and preparation method thereof
  • Anti-ultraviolet heat-resistant natural raw lacquer film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1 Preparation of UV-resistant and heat-resistant natural lacquer film

[0044] Add 0.01 gram of artificially synthesized melanin particles to 9.99 grams of natural lacquer and place in a reactor, stir and mix evenly at room temperature;

[0045] The coating film has a thickness of 150 microns, and is dried at a high temperature of 120 degrees for 3 hours, then taken out, and then dried at room temperature for more than 7 days to obtain a natural raw lacquer film with UV resistance and heat resistance, which is recorded as D1.

[0046] As a result of thermogravimetric analysis, the temperature for 50% weight loss is 439°C; the residual rate at 600°C is 17.4%.

Embodiment 2

[0047] Example 2 Preparation of UV-resistant and heat-resistant natural lacquer film

[0048] 0.2 grams of artificially synthesized melanin particles were added to 9.8 grams of natural lacquer and placed in a reactor, stirred and mixed evenly at room temperature;

[0049] The coating film has a thickness of 150 microns, and is dried at a high temperature of 120 degrees for 3 hours, then taken out, and then dried at room temperature for more than 7 days to obtain a UV-resistant and heat-resistant natural lacquer film, which is recorded as D2.

[0050] The result of thermogravimetric analysis is that the temperature at which the weight loss is 50% is 454°C; the residual rate at 600°C is 25.3%.

Embodiment 3

[0051] Example 3 Preparation of UV-resistant and heat-resistant natural lacquer film

[0052] 0.5 grams of artificially synthesized melanin particles are added to 9.5 grams of natural lacquer and placed in a reactor, stirred and mixed evenly at room temperature;

[0053] The coating film has a thickness of 150 microns, and is dried at a high temperature of 120 degrees for 3 hours, then taken out, and then dried at room temperature for more than 7 days to obtain a UV-resistant and heat-resistant natural lacquer film, which is recorded as D3.

[0054] As a result of thermogravimetric analysis, the temperature for 50% weight loss is 458°C; the residual rate at 600°C is 43.9%, as figure 1 shown.

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Abstract

The invention discloses an anti-ultraviolet and heat-resistant natural raw lacquer film. The anti-ultraviolet and heat-resistant natural raw lacquer film comprises melanin particles and a natural rawlacquer. The defect of poor ultraviolet resistance of traditional natural raw lacquer is overcome by utilizing the characteristic that THE melanin particles absorb ultraviolet rays, so that the heat-resistant natural raw lacquer film with good ultraviolet resistance is obtained.

Description

technical field [0001] The application relates to an anti-ultraviolet and heat-resistant natural raw lacquer film and a preparation method thereof, belonging to the field of coatings. Background technique [0002] Natural raw lacquer, also known as "national lacquer" or "big lacquer", is a natural paint with excellent comprehensive properties. Raw lacquer is a pure natural milky white liquid secreted by lacquer trees. After exposure to oxygen, the color gradually turns brown, and the surface gradually hardens to form a film. Paint film has excellent properties such as corrosion resistance, wear resistance and durability, and is the earliest natural resin used by humans. But it also has some disadvantages, such as poor anti-ultraviolet performance, when the paint film is used outdoors, it will crack quickly when it is exposed to sunlight, and the unsaturated side chains and alcoholic hydroxyl groups in the paint film are prone to oxidation and decomposition under ultraviolet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D193/00C09D5/32
CPCC08L2201/08C09D5/32C09D193/00C08L79/04
Inventor 高仁金夏建荣王莉玮
Owner MINJIANG UNIV
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