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Coating containing trace photoinitiator and solidifying method thereof

A technology of photoinitiator and curing method, applied in the direction of coating, polyester coating, device for coating liquid on the surface, etc., can solve the problems of human health threat, easy volatilization and migration, skin irritation, etc., to achieve good appearance Aesthetically pleasing, uniform cured film, and easy operation

Inactive Publication Date: 2012-01-04
HUBEI ERAY NUCLEAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the low-molecular-weight photoinitiator used in the coating resin has certain toxicity, it is irritating to the skin, and it is easy to volatilize and migrate, which brings unpleasant smell and even toxicity to the packaged food, which is a threat to human health.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Printing, coating, roll coating, and composite processes are used to cover the unsaturated polyester resin with photoinitiator on the tin-plated steel sheet with a thickness of 1.00 mm. The mass ratio of photoinitiator is 0.88%; it is carried out with ultraviolet light. Surface dry; then pass the tinned thin steel plate at a linear speed of 5 m / s through a self-shielding electron accelerator in the air environment, the electron accelerator generates a low-energy electron beam with an electron beam energy of 100keV and a beam current density of 1.5mA / cm, and the low-energy electron beam The beam irradiates the surface-dried topcoat for 0.03 seconds to cure 100% of the topcoat.

Embodiment 2

[0020] On the chrome-plated thin steel plate with a thickness of 0.8 mm, the unsaturated polyester resin with photoinitiator added is covered by printing, coating, roller coating and composite process, and the mass proportion of photoinitiator is 0.3%; Dry; then pass the chrome-plated thin steel plate through the self-shielding electron accelerator in the air environment at a linear speed of 9 m / s. The surface-dried topcoat was irradiated for 0.02 seconds to cure 100% of the topcoat.

Embodiment 3

[0022] On the aluminum foil with a thickness of 0.1 mm, the acrylic oligomer, acrylic monoester and polyester compound added with a photoinitiator is covered with a printing process, and the mass ratio of the photoinitiator is 0.2%; it is surface-dried with ultraviolet light; Then the aluminum foil passes through the self-shielding electron accelerator in the air environment at a linear speed of 7 m / s. The electron accelerator generates a low-energy electron beam with an electron beam energy of 150keV and a linear density of 2mA / cm. The low-energy electron beam irradiates the dry surface Top coat for 0.017 seconds to cure 100% of the top coat.

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Abstract

The invention relates to a coating containing trace photoinitiator. According to the invention, the main components of the coating are unsaturated polyester resin or acrylic acid type oligomer, acrylic acid monoester and polyester compounds as well as the photoinitiator, wherein the mass percentage of the photoinitiator is 0.1%-1%. The invention also provides a solidifying method of the coating. The solidifying method comprises the following steps: covering the coating on a substrate by using printing, spreading, roller painting and combination processes; irradiating the coating with ultraviolet light; and enabling the substrate to pass through a self-shielding electron accelerator which is located in the air atmosphere at the linear speed of 1-10 m / s, wherein the electron accelerator generates a low-energy electron beam to irradiate the coating so that the coating can be instantly solidified. The coating has the advantages that no odor emerges in the production process, trace residue of the photoinitiator in the coating can meet the requirement of food package, cost is low, and production efficiency is high; and the solidifying method is suitable for solidifying production of all-color coatings.

Description

technical field [0001] The invention relates to a coating containing a small amount of photoinitiator and a curing method thereof. Background technique [0002] In the field of coating curing, there are mainly three methods: thermal curing, ultraviolet curing and electron beam curing. At present, most of them use thermal curing, and some of them use ultraviolet light curing and electron beam curing. [0003] The principle of thermal curing is to volatilize the diluent and solvent components in the coating by heating, and the resin solidifies and adheres to the surface of the substrate. This method has high requirements for the pretreatment of the substrate and can The consumption is huge, the solvent volatilizes and pollutes the environment, and the production operation needs to protect personnel. Thermal curing technology has the advantages of less equipment investment, simple process, and wide application range, but at the same time, it has the disadvantages of long cur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/06C09D4/02C09D7/00B05D3/06
Inventor 冯敬涛贾朝伟刘平李琦严鹏程彭鑫王静郑邦文
Owner HUBEI ERAY NUCLEAR TECH
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