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Food-grade urushiol-based tung oil composite coating and preparation method thereof

A composite coating, food-grade technology, used in anti-corrosion coatings, natural resin coatings, anti-fouling/underwater coatings, etc., can solve the problems that the antibacterial properties are difficult to meet the requirements of use, the solvent resistance of urushiol coatings is poor, and achieve excellent Physical and mechanical properties, the effect of improving physical and mechanical properties, and improving antibacterial properties

Inactive Publication Date: 2019-07-30
MINJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the urushiol film is formed, there are phenolic hydroxyl groups remaining on the coating surface, so it has a certain antibacterial ability, but the antibacterial performance is still difficult to meet the requirements of use, and the residual phenolic hydroxyl groups do lead to poor solvent resistance of the urushiol coating.

Method used

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  • Food-grade urushiol-based tung oil composite coating and preparation method thereof
  • Food-grade urushiol-based tung oil composite coating and preparation method thereof
  • Food-grade urushiol-based tung oil composite coating and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0019] Urushiol and tung oil are mixed in a mass ratio of 7:3, and 1% of the antibacterial agent iHeir-ECO (nano titanium dioxide silver exchange body) and 1% of the antifungal agent S-1206 (2-methyl-4 -isothiazolin-3-one) and 3% drier ferrocene, mechanically stirred and mixed at room temperature for 1 hour to obtain food-grade urushiol-based tung oil composite resin.

[0020] The performance test is as follows: the film-forming performance of the coating is determined according to the GB / T1728-1979 paint film and putty film drying time test method; the impact resistance of the coating is measured according to the GB / T1732-1993 paint film impact resistance test method; Determination of GB / T1731-1993 paint film flexibility test method; coating antibacterial performance according to GBT 21866-2008 antibacterial paint (paint film) antibacterial test method and antibacterial effect test; coating antifungal performance according to GB-T 1741-2007 paint Determination of film mold re...

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Abstract

The invention discloses a food-grade urushiol-based tung oil composite coating and a preparation method thereof. The food-grade urushiol-based tung oil composite coating is prepared by mixing urushioland tung oil according to a mass ratio of 7: 3, adding an antibacterial agent, a mildew inhibitor and a drier, and mechanically stirring and mixing at room temperature. According to the invention, the comprehensive use performance of the urushiol is improved by using the tung oil, so that the obtained food-grade urushiol-based tung oil composite coating can be thermally cured to form a film within 30 minutes at the temperature of 120 DEG C, the impact resistance of the coating is improved to 60 cm, the flexibility is improved to 3 mm, and the alkali resistance (25% sodium hydroxide solution)is improved to 40 days. In addition, the high-temperature heat resistance of the composite coating is improved, the antibacterial rate of the coating is up to 99%, the mildew resistance is up to level0, and the total mobility of trichloromethane, the consumption of potassium permanganate and the content of heavy metals all reach the national food grade material standard, so that the composite coating can be used in the fields of paint ware and handicraft products such as tire stripper, wooden food boxes and the like.

Description

technical field [0001] The invention belongs to the technical field of food packaging materials, and in particular relates to a food-grade urushiol-based tung oil composite coating and a preparation method thereof. Background technique [0002] Raw lacquer food boxes are exquisite lacquer food boxes made of wood and coated with raw lacquer on the outside. Its craftsmanship is exquisite and rich in culture. It is not only a treasure of Chinese lacquer art, but also a treasure of Chinese culture. Compared with modern wooden food boxes coated with varnish, raw lacquer food boxes have the characteristics of no volatile organic compounds, better high temperature resistance, and antibacterial properties. [0003] The main raw material for the outer coating of raw lacquer food boxes is natural lacquer. In raw lacquer, urushiol is the main film-forming component, which is a mixture of catechol derivatives with several unsaturated branched chains. Urushiol has a certain antibacteri...

Claims

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Application Information

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IPC IPC(8): C09D193/00C09D191/00C09D5/14C09D5/08
CPCC08L2201/08C09D5/08C09D5/14C09D193/00C08L91/005C08K9/02C08K5/47C08K5/56
Inventor 薛涵与林棋李心忠方润夏建荣叶远松
Owner MINJIANG UNIV
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