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Novel water-based aluminum foil protective agent and preparation method

A protective agent, aluminum foil technology, applied in coatings, epoxy resin coatings, polyester coatings, etc., can solve the problems of high water surface tension, endanger human health, pollute the environment, etc. Good capacitance and improved wear resistance

Active Publication Date: 2010-10-20
JIANGSU ZHONGJIN MATAI MEDICINAL PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the aluminum foil protective agent for packaging aluminum foil is solvent-based, which itself contains a large amount of organic solvents, which not only endangers human health, pollutes the environment, but also has potential safety hazards in the production process.
A small number of water-based aluminum foil protective agents are used in experiments, but generally have the following deficiencies: (1) when coating aluminum foil protective agents, they need to be diluted with some hydrophilic organic solvents such as ethanol and isopropanol; (2) due to the large surface tension of water , Shrinkage cavities often appear on the substrate aluminum foil; (3) The drying temperature of water-based aluminum foil protector is higher than that of solvent-based protectant; (4) The heat resistance and adhesion are not as good as traditional solvent-based protectants, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1: Add 2.5kg of propylene glycol methyl ether and 2.5kg of methyl etherified melamine resin into a 50L small reactor with stirring and dispersion, stir for 10min, and disperse evenly; then add 15kg of water, 15kg of water-based polyurethane modified acrylic resin, polyurethane Emulsion 1.5kg, continue to stir for 30min; add 0.5kg of acrylate film-forming aid, N,N-dimethylethanolamine 0.3kg, high-speed dispersion for 30min; add dodecylbenzenesulfonic acid catalyst 0.5kg, polyether Modified dimethylsiloxane wetting agent 0.3kg, organosilicon defoamer 0.2kg, polyether modified organosilicon leveling agent 0.2kg, after stirring for 20min, add water 5kg to adjust viscosity, add N,N- Methylethanolamine is used to adjust the pH value to 7-9; filter to obtain a new type of water-based aluminum foil protectant.

Embodiment 2

[0051]Example 2: Add 5kg of propylene glycol butyl ether, 25kg of water, 5kg of high imino melamine resin in a 200L reactor with stirring and dispersion, stir for 10min, and disperse evenly; then add 45kg of water, 40kg of epoxy-modified acrylic resin, polyurethane Modified acrylic resin 40kg, epoxy resin emulsion 5kg, water-soluble polyester 5kg, continue stirring for 30min; add 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate film-forming aid 6kg , ammonia water 0.5kg, disperse at high speed for 40 minutes; then add 1.4kg of p-toluenesulfonate, 0.7kg of alkylphenol polyoxyethylene ether wetting agent, 0.7kg of silicone defoamer, epoxy modified silicone Leveling agent 0.7kg, stirring for 20 minutes; add ammonia water to adjust the pH value to 7-9; filter to obtain a new type of water-based aluminum foil protection agent.

Embodiment 3

[0052] Example 3: Add 150kg of water and 16kg of high imino melamine resin to a 500L reactor with stirring and dispersion, stir for 10min, and disperse evenly; add 210kg of polyester-modified acrylic resin, 50kg of water-based polyester, and continue stirring for 30min; Add 20kg of ethylene glycol ethyl ether acetate, 2kg of 2-amino-2-methyl-1-propanol, and disperse at high speed for 50min; then add 2.5kg of alkylbenzenesulfonic acid catalyst, dodecylbenzenesulfonate to wet 1.5kg silicone defoamer, 1.5kg epoxy modified silicone leveling agent, stir for 30min; add 25kg water to adjust viscosity, add 2-amino-2-methyl-1-propanol to adjust pH value 7-9; filter to obtain a new type of water-based aluminum foil protection agent.

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PUM

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Abstract

The invention relates to a novel water-based aluminum foil protective agent and a preparation method. The novel water-based aluminum foil protective agent comprises the following components according to the proportion: 30%-75% of main resin, 5%-30% of functional resin, 2%-20% of crosslinking agent, 5% -20% of cosolvent, 20% -60% of water, 0.2% -1% of catalyst 0.5% -5% of film-forming agent, 0.05% -0.5% of defoamer, 0.1% -0.5% of leveling agent, 0.2% -1% of wetting agent and 0.2-1% of pH adjusted agent. The invention is environmental-friendly and healthy, has no harmful solvent smell, and has low VOC. When in use, the diluent only adopts water, the capability of metal for preventing sinkhole can be greatly improved, and the adhesive force and adrasive resistance after being formed the film are good; the bakeout temperature in the process of coating is low, so the invention is more energy-saving; the heat resistance of the coating film after being coated is high; and the protective agent has simple process, stable storage and wide application and is economical and practical.

Description

technical field [0001] The invention relates to a printing coating for pharmaceutical packaging, in particular to a novel water-based protective agent for packaging aluminum foil and a preparation method thereof. Background technique [0002] The surface of packaging aluminum foil for medicine and food needs to be coated with a protective agent, which is also called OP protective agent, which is used to protect the printing ink on the surface of the aluminum foil, prevent the printing layer from falling off or being damaged, and also prevent the oxidation of the substrate aluminum foil. [0003] At present, the aluminum foil protective agent for packaging aluminum foil is solvent-based, which itself contains a large amount of organic solvents, which not only endangers human health, pollutes the environment, but also has potential safety hazards in the production process. A small number of water-based aluminum foil protective agents are used in experiments, but generally have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D163/00C09D175/04C09D167/00
Inventor 伏阳周立军陈强徐根华单宁张红军于广省张军
Owner JIANGSU ZHONGJIN MATAI MEDICINAL PACKAGING