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Method for preparing non-toxic visible ultraviolet heat insulating UV coating material

A technology for food packaging and coatings, which is applied in the field of packaging composite materials and photocuring. It can solve the problems of easy oxidation and deterioration of fatty acids, short wavelength of ultraviolet light, and weak penetrating power, and achieve the effects of reducing deterioration waste, obvious environmental benefits, and extending shelf life.

Inactive Publication Date: 2009-05-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ultraviolet light has short wavelength, high energy, weak penetrating power, and is easily absorbed by the surface of objects and converted into internal energy. Ultraviolet light plays an important role in the aging process of materials. A large number of plastics and rubbers are greatly reduced in service life due to ultraviolet light; grease Due to the unsaturation of fats and oily foods, fatty acids are easily oxidized and deteriorated under the action of light, and the addition of a large amount of antioxidants and preservatives is harmful to the human body.

Method used

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  • Method for preparing non-toxic visible ultraviolet heat insulating UV coating material

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Coupling treatment of silica:

[0024] Add 0.2%-1% of the mass of silane coupling agent or titanate coupling agent to the purchased white carbon black prepared by meteorological method, add appropriate amount of ethanol for wetting, and perform grinding and dispersing surface modification treatment.

Embodiment 2

[0026] Preparation of metal-doped tin dioxide nanopowder:

[0027] Metal-doped tin dioxide nanopowders were prepared by solid-phase synthesis: Fe was weighed in a certain molar ratio 3 o 4 and SnO 2 、Al 2 o 3 and SnO 2 , ZnO and SnO 2 , Sb 2 o 3 and SnO 2 , adding an appropriate amount of acetone to disperse, ball mill, dry, and calcined at 600-1100°C to obtain powders ranging from light blue to dark blue.

[0028] Preparation of metal-doped tin dioxide nanopowder by liquid phase co-precipitation method: Fe 3 o 4 and SnO 2 、Al 2 o 3 and SnO 2 , ZnO and SnO 2 , Sb 2 o 3 and SnO 2 , dissolved in HCl, and neutralized with ammonia as a precipitating agent to obtain a precipitate. The precipitate is washed, suction filtered, dried, and calcined at 850°C to obtain nanometer powder.

[0029] Preparation of metal-doped tin dioxide nanopowders by combustion method: Weigh Fe respectively according to a certain molar ratio 3 o 4 and SnO 2 、Al 2 o 3 and SnO 2 , Z...

Embodiment 3

[0035] A kind of non-toxic visible UV insulation UV coating for food packaging, by weight percentage: 25% of polyurethane acrylate oligomer, 20% of epoxy acrylate oligomer, 20% of tripropylene glycol diacrylate, three Methylol propane triacrylate 12%, 1,6-hexanediol diacrylate 9%, white carbon black 3%, using Sb 2 o 3 :SnO 2 1:9 metal-doped tin dioxide nanopowder 5%, 1-hydroxy-cyclohexyl acetophenone 4.5%, wetting and dispersing agent 0.4%, anti-settling agent 0.6%, leveling agent 0.3%, disinfectant Formulated with 0.2% foaming agent. The preparation method is the same as above. The UV blocking rate of the obtained paint after film coating is 97%, and the temperature difference is 5°C.

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Abstract

The invention relates to a method for preparing a nontoxic visible ultraviolet and heat insulation UV coating for food packaging and belongs to a composite material for packaging and the field of a photocuring technology. The invention relates to a white carbon black and metal doped tin oxide nanometer powder body composite ultraviolet photo-cured coating which can improve the capacity of ultraviolet insulation and heat insulation; the coating mainly comprises a photosensitive oligomer, an active thinner, a light evocating agent, white carbon black and metal doped tin oxide, a filler and an additive. The UV coating material has innocuity and harmlessness, can obstruct ultraviolet light of over 97 percent and infrared light of over 80 percent in daylight, has functions of transparence, heat insulation, sterilization and uneasy gleization, is in particular suitable for a visible plastic food packaging bag, a transparent polyester food vessel and the like, is convenient to keep food fresh and store food, prolongs guarantee period of food and reduces the deterioration and waste of food. The UV coating is not added with an organic solvent, is favorable for environmental protection, and has convenient construction and obvious environmental, social and economic benefits.

Description

technical field [0001] A method for preparing a non-toxic, visible, ultraviolet, and heat-insulating UV coating for food packaging, which relates to a light-cured, visible, ultraviolet, and heat-insulating coating that can be used in packaging occasions such as food bags, food plastic containers, etc., and belongs to packaging composite materials and optical coatings. Solidification technology field. Background technique [0002] Ultraviolet rays are radiation rays with a wavelength of 100 to 400 nanometers. The ultraviolet rays in daily life mainly come from sunlight and lighting. Ultraviolet light has short wavelength, high energy, weak penetrating power, and is easily absorbed by the surface of objects and converted into internal energy. Ultraviolet light plays an important role in the aging process of materials. A large number of plastics and rubbers have greatly reduced their service life due to ultraviolet light; grease Due to the unsaturation of oil and fat-containin...

Claims

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Application Information

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IPC IPC(8): C09D4/02C09D5/33B65D65/20B65D65/38
Inventor 姚伯龙焦钰杜郑帅倪才华李海亮
Owner JIANGNAN UNIV
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