KR20170124780A - Electronic depotsition coating agent of antimicrobial - Google Patents

Abstract

The present invention relates to an antibacterial electrodeposition coating agent. The coating agent of the present invention, as an antibacterial electrodeposition coating agent with urethane and acrylic resin, combined with a technology of silver (Ag) ions having strong antibacterial properties, enables an antibacterial coating agent to be electrodeposited to a desired uniform thickness of 4 to 6 microns or 9 to 15 microns on the surface or the inner surface of a metal product, improves inherent functions of coating, i.e., rust-resistant properties, anti-corrosion properties, water resistance, decorativeness and durability due to the antibacterial coating agent electrodeposited on the surface of the metal product, and particularly sterilizes at least 99.5% of Methicillin-resistant Staphylococcus aureus (MRSA) and enterohaemorrhagic Escherichia coli that have recently been issued and inhibits the bacteria on the surface of the metal product by containing the electrodeposited coating agent with a concentration capacity of 20 to 30% in an electrodeposition tank, dipping a cleanly pretreated metal product to be electrodeposited in the coating agent such that the metal product which is electrodeposited in a clean way can be connected to a cathode side, and applying a current of DC 10 to 30 V to the cathode side at the temperature of 27 to 32 deg. C.

Description

[0001] ELECTRONIC DEPOTSITION COATING AGENT OF ANTIMICROBIAL [0002]

The present invention relates to an electrodeposited antimicrobial coating agent, and more particularly, to a cationic electrodeposited antimicrobial coating agent comprising a urethane or acrylic resin to which silver (Ag) % Of the electrodeposition coating agent in an electrodeposition tank and immersing (immersing) the cleaned pre-treated electrodeposited metal product in the coating agent so as to be connected to the cathode side, and applying DC 10 It is possible to deposit an antimicrobial coating agent with a desired uniform thickness on the surface and the inner surface of the metal product by applying an electric current of ~ 30V to the cathode side, and the antimicrobial coating agent electrodeposited on the surface of the metal product, In addition to the enhancement of water resistance, ornamentality and durability, sterilization of at least 99.5% against the recently issued My Staphylococcus aureus (MRSA) and enterohemorrhagic Escherichia coli It is characterized.

According to the present invention, various metal products such as gold, silver and nickel-plated zinc die castings and aluminum such as faucet facility, bath room facility, metal tile, cell phone case, lEGO (nano block) It can be applied safely to hygienic and safe by effectively applying to the metal products of the apparatus which frequently touches the hands or the body.

Generally, electronic deposition is different from plating in that it is used for various purposes such as prevention of corrosion of the surface and inside of the metal product, prevention of deterioration, or gloss of the product, , Pigments, etc.) are filled and a cathode current is applied to the electrodeposited material immersed in the paint forming material so as to be connected to the anode side, the charge of the coating film formed on the anode surface is lost and adhered to the anode surface. Dehydrated to obtain a water-insoluble electrodeposited coating (coating).

In recent years, various techniques for imparting antimicrobial properties to various coating agents have been known, and patent literature of the prior art of the antimicrobial coating agent related to the present invention is listed below.

(1) An electrodeposition coating composition containing nanosilver particles and a method of using the same according to Patent Registration No. 10-0546820 (published on Mar. 25, 2006) discloses that electrodeposition coatings contain silver particles of 300 nm or less, And a method for using the electrodeposition coating composition. The present invention relates to an electrodeposition coating composition containing nanosilver particles and a method of using the electrodeposition coating composition. The electrodeposition composition containing nanosilver particles according to the present invention can be applied to a surface of a metal product of a complex shape requiring antibacterial function such as a metal filter of an air purifier, a metal heat exchanger of an air conditioner, a drum metal inside and outside of a washing machine, It can be coated to give an excellent antibacterial action.

(2) A method and a coating apparatus for the heat exchange antibacterial aluminum coil plate of an air conditioner coated with a UV coating containing metal nanoparticles in Registration No. 10-0738796 (published on July 12, 2007) Nanoparticles of metals such as platinum (Pt), gold (Au), and silver (Ag) titanium dioxide (TiO ₂ ) having a particle size of 1 meter are mixed with urethane- and acrylic ultraviolet curing paints It is continuously coated on the surface of the aluminum coil fin material for the air conditioner heat exchanger so that hygienic air can be supplied indoors from the air conditioner by originally eliminating the habitat and propagation of various bacteria and fungi living on the fin surface of the air conditioner A method for manufacturing an antibacterial aluminum coil material for heat exchange of an air conditioner coated with a UV paint containing metal nanoparticles for coating and a coating apparatus are provided.

(3) The 'method for producing an antibacterial acrylic material' in Publication No. 10-2014-0038942 (published on Mar. 31, 2014), the acrylic material having antibacterial activity is tumble-bladed, melted and extruded through an extruder. The resulting polymeric compounds include acrylic resins such as methyl methacrylate polymers, copolymers, and poly-polymers, and blends thereof, silver-containing antimicrobial additives, and optional additives such as impact modifiers, flow promoters, stabilizers, and colorants . The properties of the acrylic material, particularly its antibacterial performance, are highly dependent on manufacturing process conditions, including pre-drying feed, residual moisture content, screw speed and melt temperature. Equivalent material composition and production procedures are important.

The antimicrobial coating agent containing the nano-sized silver (Ag) of the prior art of the above-mentioned (2) and (3) has no explanation about electrodeposition for general coating, Although there is a description of the electrodeposition of the antimicrobial coating agent containing silver, there is no specific description about which antimicrobial activity the bacteria have.

It is an object of the present invention to provide an electrodeposited antimicrobial coating agent having strong antimicrobial activity against Mycobacterium tuberculosis (MRSA) and enterohemorrhagic Escherichia coli recently issued as a cationic type electrodeposited antimicrobial coating agent, unlike a conventional antimicrobial coating agent do.

Another object of the present invention is to provide an ' electrodeposited antimicrobial coating agent ' capable of uniformly coating a surface of a metal product having a complicated shape due to good dispersibility of the electrodeposited antimicrobial coating agent.

It is still another object of the present invention to provide a coating film which is improved in corrosion resistance, anticorrosion property, water resistance, decorative property and durability against the surface of a metal product and which can be applied to various metal products by hygienic convenience An electrodeposited antimicrobial coating agent ".

Metal products that can be electrodeposited include faucet facility made of materials such as gold, silver, new steel, nickel plating, zinc die casting and aluminum, bathroom accessories such as towel hanger, room facility, metal tiles, cell phone cases, legos (nano blocks), humidifier brackets, and metal parts of public utilities that are frequently in contact with the public hands or body.

The electrodeposited antimicrobial coating agent of the present invention has antibacterial silver ion technology combined with urethane acrylic coating agent, which is an electrodeposition medium. It keeps the excellent function of the electrodeposition coating agent and prevents the microbial cell tissue which is harmful to human body from being activated and the generation of fungi and various bacteria (MRSA) and enterohemorrhagic Escherichia coli (E. coli), which have an antibacterial effect of 99.5%.

The electrodeposited antimicrobial coating agent includes various pigments, and can display various colors including gold or silver images, and can also be transparent coated. In either case, the antimicrobial function of the coating is still maintained.

The electrodeposited antimicrobial coating agent of the present invention is adjusted to a solvent (water) at a concentration of 20 to 30% and filled in a conventional electrodeposition bath.

The electrodeposited metal product is usually subjected to a clean cleaning treatment in order to obtain a good coating result. That is, the first cleaning for deodorizing the debris remaining on the surface and the inner surface of the metal product to be coated, the second cleaning of the precise surface by the ultrasonic wave, the third cleaning of the water pressure by the spray, It is washed.

The washed electrodeposited metal product is immersed in an antimicrobial coating agent contained in the electrodeposition bath so as to be connected to the cathode of the electrodeposition bath and a current of 10 to 30 V DC is applied to the cathode side at a temperature of 27 to 32 캜 .

Therefore, the cationic coating agent (paint) is adhered to the inner and outer surfaces of the electrodeposited metal product and covered with a solid antibacterial coating film insoluble in water dehydrated.

The thickness of the coating film is controlled by the amount of current and time, and electrodeposited at 4 to 6 micron thickness by electrodeposition at DC 10v for 30 seconds and electrodeposited at 9 to 15 micron by electrodeposition at DC 30v for 60 seconds.

The electrodeposited antimicrobial coating agent of the present invention is a cationic type and has good dispersibility in a solvent, so that it is possible to coat a film with a uniform thickness by a charge on the entire surface of a complicated metal product, and the adhesion is very strong, .

After the electroplated antimicrobial coating is completed, the metal product is subjected to a cleaning process such as the pretreatment described above to obtain a product to which the antimicrobial coating agent of the present invention is electrodeposited.

The metal product to which the antimicrobial coating agent is electrodeposited according to the present invention is excellent in surface decorating performance, anti-rusting (anticorrosive) corrosion resistance, durability and durability due to the basic function and color of the coating agent It inhibits the activation of microorganism cell tissue which is harmful to human body and inhibits the generation of mold oil and various bacteria.

In particular, for Staphylococcus aureus (MRSA) and intestinal hemorrhagic Escherichia coli, at least 99.5% of the antimicrobial properties were exhibited as a result of the experiment.

Since the electrodeposition coating agent is electrodeposited on the inner and outer surfaces of various metal products as an electrodeposition coating agent, it can be coated with a film having a uniform thickness on a complicated shaped product.

In addition, the coating film coated by the electrodeposited antibacterial coating agent is firmly electrodeposited, and the surface of the metal product is excellent in decorative property, corrosion resistance, corrosion resistance, moisture resistance and durability.

The antimicrobial action of the coating agent on the inner and outer surfaces of the metal product inhibits the activation of the cell tissue of the microorganisms harmful to the human body, thereby inhibiting the generation of fungi and various bacteria.

Especially, the antimicrobial activity against Staphylococcus aureus and enterohemorrhagic Escherichia coli is very excellent, so that there are various effects that can be used more hygienically and safely for various metal products with frequent hand and body contact.

(Example 1)

(1) Pretreatment of electrodeposited metal products

Faucet fittings (faucet fittings). Bathroom accessories, metal tiles, and other electrodeposited metal products. The cleaning process typically includes a first physical cleaning for deodorization of debris remaining on the surface of the product, a second cleaning of the ultrasonic cleaning for deodorizing the fine particles attached to the surface of the product, a spray cleaning The third cleaning, and the fourth cleaning step, which is finally cleaned with purified water. The cleaning process is generally carried out.

(2) Electrodeposition process of electrodeposited antimicrobial coating agent

The electrodeposition coating bath of the present invention is filled with a color paint (gold or silver) and an antibacterial coating in an electrodeposition tank equipped with an ordinary electrode and adjusted to a concentration of 20 to 30% by volume.

The temperature of the electrodeposition bath was maintained at 27 占 폚, and the electrodeposited metal product was immersed in the electrodeposited antimicrobial coating agent and electrodeposited for 30 seconds at DC 10v to electrodeposit a coating film having a thickness of 4 to 6 microns on the outer and inner surfaces of the metal product )do.

When electrodeposited at DC 30v for 60 seconds in the same electrodeposition bath, electrodeposition is carried out with a coating film having a thickness of 9 to 15 microns.

(3) Post-treatment of electrodeposited metal products

The electrodeposited metal product is washed with ion-exchanged water four times in the same process as the pretreatment process of the electrodeposition metal product to obtain a product electrodeposited on the inner and outer surfaces of the antimicrobial coating film of the present invention.

(4) Antibacterial test

According to the above example, when the surface of the metal article electrodeposited with the antibacterial coating film was contacted with Staphylococcus aureus (MRSA) for 24 hours, it was reduced by 99.07%.

It was confirmed that 99.71% of the same metal product was reduced after 24 hours of contact with intestinal hemorrhagic Escherichia coli.

It was confirmed that the occurrence of other bacteria and fungi was suppressed.

Therefore, the electrodeposited antimicrobial coating agent of the present invention has good basic physical properties of the coating agent and strong antimicrobial activity, so that the present invention can be applied to various products and used more hygienically and safely.

Claims (3)

A coating agent electrodeposited on the surface of a metal product,
Wherein the electrodeposition coating agent is made of urethane or acrylic resin combined with silver (Ag) ion technology having strong antimicrobial activity. The method according to claim 1,
The electrodeposition bath provided with the electrodes was mixed with the electrodeposition coating agent, and the electrodeposited metal product was immersed in the coating agent in the concentration of 20 ~ 30% and electrodeposited for 30 ~ 60 seconds at DC 10 ~ 30v And a coating film having a predetermined thickness is electrodeposited on the outer and inner surfaces of the metal product. The method according to claim 1,
The antimicrobial coating agent is an electrodeposited antimicrobial coating agent having excellent antimicrobial action against Mycobacterium tuberculosis (MRSA) and intestinal hemorrhagic Escherichia coli.