KR20090061193A - Coating composition for rust proof of metal - Google Patents
Coating composition for rust proof of metal Download PDFInfo
- Publication number
- KR20090061193A KR20090061193A KR1020070128101A KR20070128101A KR20090061193A KR 20090061193 A KR20090061193 A KR 20090061193A KR 1020070128101 A KR1020070128101 A KR 1020070128101A KR 20070128101 A KR20070128101 A KR 20070128101A KR 20090061193 A KR20090061193 A KR 20090061193A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D17/00—Pigment pastes, e.g. for mixing in paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
A low viscosity zinc-ceramic coating composition for the rust treatment of metal surfaces is disclosed. The composition consists of 1-10% of organosilane, 15-40% by weight of metal oxide, 20-40% by weight of binder resin, 20-40% by weight of zinc flakes of 1 micron or less, dye and And 5-10% by weight of pigment, and 10-25% of solvent.
According to the composition of the present invention, it is possible to provide a rust preventive agent having high corrosion resistance even with a low coating film as compared with the prior art. Therefore, the composition (drug) consumes less, which is economically advantageous, and also has the effect of being easily applied to small parts, pipes blocked on one side, products requiring ductility, and the like, which were difficult in the prior art.
Description
The present invention relates to a rust preventive coating, and more particularly to a low viscosity nano zinc-ceramic coating composition for the rust treatment of the metal surface. The low viscosity nano zinc-ceramic coating composition for the anti-rust treatment of the metal surface of the present invention can be applied to the anti-corrosive coating on parts such as automobiles, electrical and electronics, aviation, ports.
Conventional zinc powder anti-corrosive coating agent is a liquid of high viscosity. Therefore, it is difficult to apply to articles such as small products or pipes with one hole blocked. In addition, in order to blacken the conventional zinc powder (Zinc Pwder) anti-corrosive coating agent to increase the number of coatings more than one time, which is causing the cost of the anti-rust treatment.
In addition, zinc plating, zinc alloy plating or zinc mal coating is applied to the metal surfaces of automobile parts for rust prevention purposes. After trivalent chromium or non-chromium rust treatment is applied to the surface of metal parts such as coating damage or salt water, Corrosion resistance is not necessarily enough in a high temperature and high humidity atmosphere.
In recent years, regulations on the use of hazardous substances have been made in the world for environmental protection. For example, there is the EU's RoHS Directive. Prohibited substances include Pb, Hg, Cd, Cr + 6, PBB, and PBDE. Currently, even the small amount of banned substances in the automotive and electronics industries has a huge impact on exports.
Therefore, in view of the above point, in the present invention, a low viscosity nano zinc-ceramic coating composition for anti-rust treatment of metal surface which does not violate RoHS basically and has high corrosion resistance even at low film thickness in view of the above point. To provide.
The above object of the present invention is to achieve the liquid stability of the final coating agent by a suitable combination with the type of ceramic, dispersant, zinc flake particle size to be mixed, and also to provide a coating of high corrosion resistance by strong chemical bonding Is achieved by.
That is, the composition of the present invention is a low-viscosity zinc-ceramic coating composition for anti-rust treatment of the metal surface, with respect to the total weight of the composition 100% by weight of organic silane 1-10%, metal oxide 15-40% by weight, binder resin 20 -40% by weight, 20-40% by weight of zinc flakes of 1 micron or less in thickness, 5-10% by weight of dyes and / or pigments, 0.02-15% of acid, 10-25% of solvent.
As described above, the present invention can provide a rust preventive agent having high corrosion resistance even with a low coating film compared to the prior art. Therefore, the composition (drug) consumes less, which is economically advantageous, and also has the effect of being easily applied to small parts, pipes blocked on one side, products requiring ductility, and the like, which were difficult in the prior art.
Hereinafter, the present invention will be described in detail.
The present invention crosslinks organoalkoxisilane and metal alkoxide to serve as a multifunctional coating, and adds water or alcohol to the sol base in which the colloidal particles are dispersed. Zinc flakes are added to increase hearing.
The organooxidant silane increases the bonding strength to the metal surface as a coupling agent, increases the bonding strength between the coating agent and the metal, and also changes the viscosity of the coating composition of the present invention. As available, Divinyldi-beta-methoxyethoxysilane, divinyldimethoxysilane, gamma-glycidoxypropyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane Methacryloxypropyltrimethoxysilane (gamma-methacryloxypropyltrimethoxysilane), aminopropyltrimethoxysilane, aminopropyltriethoxysilane, N-beta-aminoethyl-gamma-propylmethyldimethoxysilane (N -beta-aminoethyl-gamma-propylmethyidimethoxysilane). The organo oxide is 1 to 10% by weight of the total composition of the present invention.
Metal oxides include oxides such as Si, Al, Zr, Cr, Ti, Mg, Mo, Fe, carbides, nitrides, etc. and are selectively used according to their characteristics and usage. It is Si (OR) 'and Al (OR)' used universally, and the particle diameter of these components is preferably about 0.01 to 1 µm on average. Metal oxide is 15 to 40% by weight of the total composition of the present invention.
If the organic oxide silane or metal oxide is less than the lower limit of the component ratio, the bonding strength is weakened, the antirust effect is reduced, and if the upper limit is exceeded, gelation becomes difficult.
The binder serves to bind the particles in the composition, such as polyurethane, epoxy, polyester, polyvinyl, and the like, which are readily available on the market. Binder resin is included 20 to 40% in the total composition of the present invention. Such a binder improves the adhesion to the metal and affects the coating property. When the component ratio is below the lower limit, the adhesion and coating property are not good, and when the binder is above the upper limit, the binder not only increases viscosity but also reduces corrosion resistance.
Zinc flakes form zinc oxide and act as a sacrificial film on the iron surface. Figure 1 schematically shows the bonding structure of the coating film and the metal surface of the present invention, Figure 2 schematically shows the molecular structure inside the zinc ceramic coating film of the present invention. In Figure 1, R represents an alkyl group. The zinc flakes have a flat structure and a length of about 10 mu m is used. Here, the zinc flakes used in the composition of the present invention may have a dense, uniform and non-coarse appearance as the thickness thereof is 1 μm or less on average. As the particles become larger, i.e., larger than 1 mu m, the rust preventive power is remarkably lowered, and the coating thickness is also high.
In addition, the composition of the present invention is to promote the binding of the metal oxide and organo oxide Contains acid. Nitric acid, acetic acid, iodic acid, oxalic, carbamic acid, etc. can be used. Depending on the type, 0.02-15% is used.
The compositions of the present invention also include pigments and / or dyes to produce various colors on the coating surface. The pigments that can be used may be well known pigments in the art, but mainly inorganic iron oxides and carbon blacks, and azo dyes or bat dyes are used as dyes. Pigments and / or dyes are included 5-10% in the total composition of the present invention and are readily available on the market.
The solvent in the composition of the present invention is a mixture of one or more selected from water, isopropyl alcohol, butyl cellussolve, and methethyl ketone, and contains 10-25% of the total composition.
The composition of the present invention may further include a wax (PTFE series, etc.) as necessary as other torque stabilizers.
As the coating method of the composition of the present invention, all of the deposition method, the spray method, and the roller method are applicable. In particular, the composition of the present invention is 9 ~ 13sec by Zahn cup viscosity measurement. Since the viscosity is not high, the coating film thickness of about 3㎛ or more can be obtained by applying 500rpm centrifugal dehydration with a 5HP motor after deposition coating to the metal surface. Conventional technology (zinc-coating technology). It is possible to solve such a small object, which is difficult to apply, and a pipe with a narrow entrance, which can be solved with the composition of the present invention. Curing conditions of the coating composition of the present invention is by exposure to about 20 minutes at 160 ~ 200 ℃.
The following table is the ratio of the composition for the basic black coating and silver coating.
Table 1: Composition for Basic Black Coating
1) Metal Oxide: (AMERICAN ELEMENT; AL-OX, SI-OX)
2) Binder: (DOW: D.E.R)
3) organic oxide silane: (KCC: KBM)
3) Zinc flake: (Inco: Zinc flake)
Table 2: Composition for Basic Silver Coating
The black coating composition of Table 3 below was added to a flange nut of 10 mm and then degreased-washed-phosphate film-washed-dehydrated-dried-basecoat-dried (160 degrees, 20 minutes) -top coat-dried (160 degrees, 20 minutes). The results are shown in Table 4 below.
Table 3
Table 4
Prior art: Zinc powder coating technology.
Corrosion resistance was tested by spraying 5% brine at 35 ° C.
Peeling test is a test that checks whether there is a coating film on the tape by peeling the sheath into a 1mm-thick checkerboard, rubbing it with 3M tape, and then peeling off the tape.
Figure 1 schematically shows the bonding structure of the coating film and the metal surface of the present invention,
Figure 2 schematically shows the molecular structure of the zinc oxide film of the present invention
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070128101A KR20090061193A (en) | 2007-12-11 | 2007-12-11 | Coating composition for rust proof of metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070128101A KR20090061193A (en) | 2007-12-11 | 2007-12-11 | Coating composition for rust proof of metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20090061193A true KR20090061193A (en) | 2009-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020070128101A KR20090061193A (en) | 2007-12-11 | 2007-12-11 | Coating composition for rust proof of metal |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20090061193A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101692929B1 (en) * | 2016-08-24 | 2017-01-04 | 서번산업엔지니어링주식회사 | Corrosion resistant coating composition of air conditioning system |
| WO2017164438A1 (en) * | 2016-03-23 | 2017-09-28 | 주식회사 제이엘서피스 | Eco-friendly zinc flake surface treatment solution for preventing corrosion of metal parts and surface treatment method using same |
-
2007
- 2007-12-11 KR KR1020070128101A patent/KR20090061193A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017164438A1 (en) * | 2016-03-23 | 2017-09-28 | 주식회사 제이엘서피스 | Eco-friendly zinc flake surface treatment solution for preventing corrosion of metal parts and surface treatment method using same |
| KR101692929B1 (en) * | 2016-08-24 | 2017-01-04 | 서번산업엔지니어링주식회사 | Corrosion resistant coating composition of air conditioning system |
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