Hollow alkali washing aluminum aqueous protective paint and preparation method and application thereof

A protective coating and alkaline cleaning technology, applied in polyester coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve the problems of unhealthy operators, fire hazards of volatile solvents, and inability to ensure coating resistance. and other problems, to achieve the effects of safety and environmental protection in the preparation process, accelerated curing speed, and strong alkali corrosion resistance.

Active Publication Date: 2015-04-15
GUANGZHOU HUMAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because this type of coating uses a large amount of solvents that seriously pollute the environment, and the construction environment is dangerous, a large amount of volatile solvents are likely to cause fire hazards and are also unfavorable to the health of operators.
Although water-based coatings do not have the above-mentioned problems of oil-based alkali-cleaned aluminum protective coatings, since water-based coatings use water as a diluent, they are not easy to dry, which makes it difficult for the coating to fully cure, so that the coating's resistance to alkali cannot be ensured.

Method used

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  • Hollow alkali washing aluminum aqueous protective paint and preparation method and application thereof
  • Hollow alkali washing aluminum aqueous protective paint and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Mix the co-solvent (4.5kg ethanol, 2kg butanol, 1.5kg propylene glycol methyl ether) in a 200L stainless steel reaction kettle, start the disperser and adjust the dispersion speed to 500r / min to mix the components of the co-solvent evenly, and then Put in 0.15kg leveling agent silok-8000 (Silok Chemical Co., Ltd., polyether modified polyorganosiloxane, which belongs to silicone modified polyether leveling agent), 0.5kg water-based cobalt metal drier (Shanghai Ou Anji Trading Company) was dispersed and dissolved in the reactor, then 60.3kg of deionized water was added, stirred for 10 minutes, and then dispersed into a uniform liquid phase to obtain a mixed solution.

[0056] Increase the dispersion speed to 800r / min, add 1kg of water-dispersible amino curing agent cymel-303 (American Cytec, full methyl etherified amino curing agent, belongs to amino resin, effective part 98%) into the reaction kettle, stir to dissolve, and get Dispersion system 1.

[0057] (2) Put 3...

Embodiment 2

[0061] (1) In a 200L stainless steel reaction kettle, mix the cosolvents (5.5kg ethanol, 3kg isopropanol, 3.5kg propylene glycol methyl ether) evenly, start the disperser at 200r / min to disperse, and put in 0.2kg leveling agent BYK333 (German BYK chemical, silicone modified polyether leveling agent), 0.2kg non-ionic high-efficiency leveling agent Dynol 607 (American gas chemical, non-ionic surfactant), 200r / min stirring for 10min to dissolve, then add 22kg deionized water and dispersed into a homogeneous liquid phase to obtain a mixed solution.

[0062] Increase the dispersion speed to 800r / min, add 5.5kg of blocked water-based isocyanate curing agent BayerBayhydrol BL 5140 (Bayer Chemical, polyisocyanate curing agent, 40%) into the reaction kettle, stir and dissolve for 20 minutes to obtain dispersion system 1.

[0063] (2) Select solid acrylic resin SR625 (DIRANSA Argentina Dilansa Chemical) and water-based aliphatic anionic polyurethane dispersion UH 2606 (Bayer Chemical,...

Embodiment 3

[0068] (1) In a 200L stainless steel reaction kettle, mix the co-solvents (5kg ethanol, 3kg butanol, 3kg propylene glycol methyl ether, 4kg ethylene glycol butyl ether) evenly, start the disperser at 500r / min to disperse at a medium speed, and put in 0.5 kg BYK-361N (German BYK chemical, acrylic leveling agent) and 0.1kg fluorocarbon surfactant FS-610 (DuPont, organic fluorocarbon leveling agent) were stirred and dissolved to obtain a mixed solution.

[0069] Then add 4kg of butylated melamine resin CYMEL 688 (Cytec, butylated melamine resin, amino resin curing agent, 70%) and 0.5kg of dodecylbenzenesulfonic acid to the reaction kettle, fully stir and dissolve into a uniform liquid phase, continue to add 46.2kg of deionized water, and disperse for 20 minutes to obtain a uniform dispersion system 1.

[0070](2) Add 33.6kg of water-based self-drying acrylic modified epoxy ester resin HD-EA605 (Beijing Jinhuili Applied Chemical Industry, 75% solid content, which belongs to modifi...

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Abstract

The invention provides hollow alkali washing aluminum aqueous protective paint and a preparation method and application of the hollow alkali washing aluminum aqueous protective paint. The hollow alkali washing aluminum aqueous protective paint adopts an aqueous formula for the first time and comprises the components by weight: 30-60 parts of aqueous resin, 1-5.5 parts of curing agent, 8-15 parts of cosolvent, 0.05-0.20 parts of defoaming agent and 0.45-1.3 parts of auxiliary agent. The hollow alkali washing aluminum aqueous protective paint is simple and convenient in preparation method; the obtained hollow alkali washing aluminum aqueous protective paint successfully solves the technical problems of the aqueous formula of the aqueous protective paint at present in the aspects of alkali resistance, closing performance, neat aluminum washing edges, flexibility, good adhesive force on an aluminum coated layer and the like by specifically selecting the formula components and the component proportion through a large amount of exploration and tests; the product is safe and environment-friendly; and successful application of the aqueous protective paint in the technical field of alkali washing aluminum is realized.

Description

technical field [0001] The invention relates to the field of protective coatings, in particular to a water-based protective coating for hollowed-out alkali-washed aluminum and its preparation method and application. Background technique [0002] As a film with metallic effect, aluminized film is widely used in packaging fields such as food, cigarette packs or gifts. Holographic laser technology and coloring process give the aluminized film a magnificent visual effect, and the application of partial hollow-out aluminum washing technology enhances the aesthetics of the aluminized film, especially the anti-counterfeiting function. The aluminum washing technology protects the overall aluminized aluminized film by local positioning, and then corrodes the non-protected part with lye to form an aluminized film with a hollow pattern. This technology mainly relies on the alkali corrosion resistance of alkali-washed aluminum protective coatings. [0003] The aluminized film is based...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/00C09D175/04C09D125/14C09D163/00C09D167/00C09D161/06C09D161/20B05D7/24B41M1/10
Inventor 陈兴耀黄艳轶金兴菊陈森卢耀柏何梦
Owner GUANGZHOU HUMAN CHEM
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