KR20100052824A - Nonadhesive inorganic ceramic coating composition and coating method using the same - Google Patents
Nonadhesive inorganic ceramic coating composition and coating method using the same Download PDFInfo
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- KR20100052824A KR20100052824A KR1020080111686A KR20080111686A KR20100052824A KR 20100052824 A KR20100052824 A KR 20100052824A KR 1020080111686 A KR1020080111686 A KR 1020080111686A KR 20080111686 A KR20080111686 A KR 20080111686A KR 20100052824 A KR20100052824 A KR 20100052824A
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- coating composition
- metal surface
- coating
- total weight
- inorganic ceramic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
-
- 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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
The present invention, based on the total weight of the coating composition (a) the total weight of the colloidal silica sol, consisting of 20 to 33 wt% silica solids and 80 to 67 wt% of a water-soluble solvent, the colloidal silica sol having a pH of 2-4 28-39 wt%; (b) 0.1-10 wt% of a zirco aluminate coupling agent; (c) Alkoxysilane containing 56-67 wt% of methyl trimethoxysilane, 29-32.7 wt% of methyltriethoxysilane, and 0.3-14 wt% of glycidyloxypropyl trimethoxysilane with respect to the total weight of an alkoxysilane compound. Compound 35-50 wt%; (d) 8 to 25 wt% of a C1 to C10 alcohol compound; (e) 3 to 13 wt% functional fillers; (f) 0.5-10 wt% of silicone oil polymer; (g) 3-11 wt% ceramic powder; And (h) non-sticky inorganic ceramic coating composition comprising an inorganic pigment 7 ~ 15wt% and a coating method using the same.
Description
The present invention relates to a non-tacky ceramic coating composition and a coating method using the same, and more particularly, to a human body, which is used for metal surfaces of aluminum, al costa, and die-casting materials of household goods such as household appliances or cookware for heating cooking. The present invention relates to a non-tacky inorganic ceramic coating composition which does not contain heavy metals harmful to and a coating method using the same.
To improve the functionality of various cooking supplies such as microwave ovens, roasted meat plates, pots, pans, etc., and household goods such as heaters, fans, refrigerators, irons, and building materials, health supplements, and industrial items that are closely related to dietary life. Various types of surface coatings have been developed and used.
Such coatings are classified into plastic coatings such as antibacterial resins, oxidative pigmentation, or inorganic enamels according to the intended use. In the case of cookware, heat-resistant coatings and enamels have been proposed. As the heat-resistant coating agent, Teflon (P, T, F, E,) coating having good abrasion resistance, durability, heat conductivity, and washability of cookware is widely used. For example, Korean Utility Registration No. 10-206737 has a coating structure configured to improve the adhesion of Teflon coating and prevent food from sticking by forming an aluminum oxide film layer by anodizing and a Teflon coating layer on the surface of an aluminum cooking vessel in turn. Is disclosed. However, such a coating structure has a disadvantage that it is vulnerable to abrasion and scratch because the surface strength of the Teflon coating itself is weak. In addition, Teflon is also coated on the ceramic coating layer, and there is a problem in that the surface strength of the Teflon is combined with a high temperature heat treatment or a firing process for such coating. In recent years, the use of Teflon coating has been avoided as it is known that carcinogens are released from the Teflon coating layer. In particular, the production and use of perfluorooctanoic acid (PFOA), the main raw material of Teflon, is prohibited, so it is harmless to the human body that can be used for surface coating of cookware, food does not stick, heat conductivity is fast and wear resistance There is a need for development of good coating compositions.
The present invention is to solve the above problems of the prior art,
First, it is harmless to human body because it does not contain heavy metal that is harmful to human body and does not emit carcinogenic substance when heated,
Secondly, it is hygienic because it emits far-infrared rays and anions and has excellent antibacterial, antifungal and deodorizing effects.
Third, food is cooked evenly because of its excellent thermal conductivity,
Fourth, because of high surface strength, it has excellent abrasion resistance and scratch resistance, excellent adhesion to metal surface and excellent heat resistance, so there is no change in color even after long use. It aims to provide.
The present invention, with respect to the total weight of the coating composition,
(a) 28 to 39 wt% of a colloidal silica sol having a solid content of 20 to 33 wt% and 80 to 67 wt% of a water-soluble solvent and a pH of 2 to 4 with respect to the total weight of the colloidal silica sol;
(b) 0.1-10 wt% of a zirco aluminate coupling agent;
(c) Alkoxysilane containing 56-67 wt% of methyl trimethoxysilane, 29-32.7 wt% of methyltriethoxysilane, and 0.3-14 wt% of glycidyloxypropyl trimethoxysilane with respect to the total weight of an alkoxysilane compound. Compound 35-50 wt%;
(d) 8 to 25 wt% of a C1 to C10 alcohol compound;
(e) 3 to 13 wt% functional fillers;
(f) 0.5-10 wt% of silicone oil polymer;
(g) 3-11 wt% ceramic powder; And
(h) provides a non-adhesive inorganic ceramic coating composition comprising 7-15 wt% of inorganic pigments.
In addition, the present invention
(a) a pretreatment step of removing foreign matter or grease from the metal surface;
(b) a sandblasting step of polishing the pretreated metal surface;
(c) a dust removal step of removing dust generated in the sandblasting step;
(d) preheating the metal surface from which the dust is removed to 40 ° C. to 50 ° C .;
(e) coating the non-tacky inorganic ceramic coating composition of the present invention on the preheated metal surface; And
(f) it provides a method for coating a metal surface comprising the step of drying and baking the metal surface coated with the coating composition.
The non-adhesive inorganic ceramic coating composition of the present invention does not contain heavy metals that are harmful to the human body and does not emit carcinogenic substances when heated, and is harmless to the human body. It can be used, food is cooked well evenly because of its excellent thermal conductivity, it has excellent wear resistance and scratch resistance due to high surface strength, excellent adhesion to metal surface and excellent heat resistance, so there is no change of color even after long use. It has excellent durability.
In addition, when coating the metal surface using the coating composition, preheating and firing is performed at a low temperature, thereby providing an effect of reducing the production stage.
The present invention relates to the total weight of the coating composition,
(a) 28 to 39 wt% of a colloidal silica sol having a solid content of 20 to 33 wt% and 80 to 67 wt% of a water-soluble solvent and a pH of 2 to 4 with respect to the total weight of the colloidal silica sol;
(b) 0.1-10 wt% of a zirco aluminate coupling agent;
(c) Alkoxysilane containing 56-67 wt% of methyl trimethoxysilane, 29-32.7 wt% of methyltriethoxysilane, and 0.3-14 wt% of glycidyloxypropyl trimethoxysilane with respect to the total weight of an alkoxysilane compound. Compound 35-50 wt%;
(d) C1-C10 alcohol compounds 8-25 wt%;
(e) 3 to 13 wt% functional fillers;
(f) 0.5-10 wt% of silicone oil polymer;
(g) 3-11 wt% ceramic powder; And
(h) Non-tacky inorganic ceramic coating composition comprising 7-15 wt% of inorganic pigment.
In the coating composition of the present invention, a binder can be obtained by adding the alkoxysilane compound to the mixture in which the zirco aluminate coupling agent is added to the colloidal silica sol, and performing hydrolysis, condensation, and polymerization reaction.
The colloidal silica sol is composed of 20 to 33 wt% of silica solids and 80 to 67 wt% of an aqueous solvent with respect to the total weight thereof, and preferably has a pH of 2 to 4. If the solid content of the colloidal silica sol is less than 20wt%, the coated coating film becomes weak, the thickness of the coating film becomes thin, and if it exceeds 33wt%, there is a problem of gelation easily.
The content of the colloidal silica sol is preferably from 28 to 39 wt% with respect to the total weight of the coating composition, and if it is included below 28 wt%, the coated coating becomes weak, and if it exceeds 39 wt%, a problem of easily gelling occurs.
The zirco aluminate coupling agent improves adhesion to the metal surface, improves strength and wear resistance, serves to prevent corrosion, and is preferably included in an amount of 0.1 to 10 wt% based on the total weight of the coating composition. At this time, if the content is less than 0.1wt%, the above-mentioned functions are insufficient, and the physical properties of the coating film are lowered.
The alkoxysilane compound is represented by the general formula RnSi (OR ') 4-n, wherein R is a C1-5 alkyl group unsubstituted or substituted with another substituent, and R' is an alkyl group having 1-6 carbon atoms.
The alkoxysilane compound used in the coating composition of the present invention is specifically 56 to 67 wt% of methyltrimethoxysilane, 29 to 32.7 wt% of methyltriethoxysilane, and glycidyloxypropyltrime based on the total weight of the alkoxysilane compound. It is preferable to contain 0.3-14 weight% of oxysilane. When the components are included in the above content range, the lowering of the reactivity of the binder or the lowering of physical properties due to overreaction do not occur, thereby obtaining a binder having desirable physical properties.
The content of the alkoxysilane compound is preferably 35 to 50 wt% with respect to the total weight of the coating composition, and when included in less than 35 wt%, the reactivity is lowered. A coating agent with good physical properties can be obtained.
In the coating composition of the present invention, the C1 to C10 alcohol compound is used as a solvent for preventing gelation of the hydrolysis reactant. That is, in the coating composition of the present invention, as the R-OH dehydrates over time, the siloxane bonds become stronger, and eventually gelation proceeds. In order to prevent this, C1 to C10 are used as solvents in the hydrolysis reactants. The alcohol compound of is added. Examples of the C1 to C10 alcohol compound include methanol, ethanol and isopropyl alcohol, and these may be used alone or in combination of two or more.
The content of the alcohol compound of C1 ~ C10 is preferably 8 to 25wt% based on the total weight of the coating composition, in consideration of compatibility with the hydrolysis reactants and viscosity of the coating agent.
In the coating composition of the present invention, the functional filler serves to prevent corrosion and improve durability and wear resistance, and specific examples thereof include aluminum oxide, silicon dioxide, zirconium, and the like. These may be used alone or in combination of two or more.
The content of the functional filler is preferably 3 ~ 13wt% based on the total weight of the coating composition, it is added by dispersion in a ball mill, a sand mill. When the functional filler is added below 3wt%, the above function may not be completed, and when added above 13wt%, the glossiness of the coated coating may be lowered, and the adhesion to the metal surface may be lowered.
In the coating composition of the present invention, the silicone oil polymer is to prevent food from sticking, and is preferably added in an amount of 0.5 to 10 wt% based on the total weight of the coating composition. If the silicone oil polymer is added in less than 0.5wt%, food sticking occurs, and if it is added in excess of 10wt%, the sticking does not occur, but the adhesion may be lowered.
In the coating composition of the present invention, the ceramic powder emits far infrared rays and anions, thereby serving to provide antibacterial, anti-fungal, deodorizing effect. Specific examples of ceramic powders that emit far-infrared rays include natural mineral groups such as quartz, monzonite, gneiss and rhyolite tuff (tourmaline, loess, biotite, amethyst, raw ore, bamboo charcoal, udonite, noble stone, obsidian and elvanite). , Wangseok, lava, ghost stone), and the ceramic powder that emits anions include strontium, vanadium, zirconium, cerium, neodymium, lanthanum, barium, rubidium, cesium, gallium and the like. The ceramic powder is milky white, fine powder having a particle size of 3 ~ 4㎛, far infrared rays are emitted more than 90%, anion is preferably released 800 ~ 1200 pieces per cc.
The content of the ceramic powder is preferably 3 to 11wt% with respect to the total weight of the coating composition, and when added to less than 3wt%, it does not perform the above functions, and when it is added in excess of 11wt%, the surface of the coating film is roughened. It can lower gloss and lower adhesion.
In the coating composition of the present invention, as the inorganic pigment for producing a color, those commonly used in the art may be used. Such inorganic pigments are preferably added in an amount of 7 to 15 wt% based on the total weight of the coating composition, and produce a desired color by combining various colors.
The non-adhesive inorganic ceramic coating composition of the present invention is a one-part, one-coating, excellent thermal conductivity, high surface strength, excellent abrasion and scratch resistance, excellent adhesion to metal surfaces and excellent heat resistance for a long time. There is no change in color even when used, so it has excellent durability.
In addition, the present invention
(a) a pretreatment step of removing foreign matter or grease from the metal surface;
(b) a sandblasting step of polishing the pretreated metal surface;
(c) a dust removal step of removing dust generated in the sandblasting step;
(d) preheating the metal surface from which the dust is removed to 40 ° C. to 50 ° C .;
(e) coating the non-tacky inorganic ceramic coating composition of the present invention on the preheated metal surface; And
(f) relates to a method for coating a metal surface comprising the step of drying and firing the metal surface coated with the coating composition.
Coating method of the present invention,
Between (e) coating the non-tacky inorganic ceramic coating composition of the present invention on the preheated metal surface and (f) drying and firing the metal surface coated with the coating composition. The non-adhesive ceramic marble coating step may be further performed before the inorganic ceramic coating composition is dried.
The (a) pretreatment step of removing foreign matter or grease on the metal surface is performed through a washing tank step, a rinse tank step and a steam bath step using T, C, E (trichlorethylene).
The sandblasting step (b) of polishing the pretreated metal surface is a sanding step of polishing the metal surface using polishing sand or an abrasive, and sandblasting is performed at 80 μm to 100 μm of sand of sand of about 5 μm.
In the preheating step (d), the surface of the metal is preferably preheated to 40 ° C. to 50 ° C. If the preheating temperature is less than 40 ° C., the flow of the coating composition occurs and the gloss decreases. There is a problem of poor adhesion and the generation of pin holes or craters on the coating surface.
In the step (e) coating the non-tacky inorganic ceramic coating composition of the present invention on the preheated metal surface, the coating film thickness is uniformly 35 ± 5 μm and the thickness of the coating film is 35 ± 5 μm. Adversely affects.
In the (h) non-adhesive ceramic marble coating step, before the coating film coated in the previous step is dried, it is possible to form a colorful shape by adjusting the discharge amount and the air amount of the coating device to coat the spot shape.
Drying and firing the metal surface coated with the coating composition (f) is performed at a temperature of 200 ° C. or less for about 35 minutes. Specifically, 1 step of drying for about 10 minutes at 0 ℃ ~ 100 ℃; 2 steps of drying for about 10 minutes at 100 ℃ ~ 180 ℃; And it characterized in that it comprises three steps of drying to dry for about 15 minutes at 180 ℃ ~ 200 ℃.
By drying under the above conditions, the aesthetic effect of the coating and the hardness and abrasion resistance of the coating film can be significantly improved, thereby improving the aesthetics and durability of cookware and home appliances.
Hereinafter, the present invention will be described in more detail with reference to Examples. However, the following examples are provided to illustrate the present invention, and the present invention is not limited to the following examples and may be variously modified and changed.
Example One: Non-stick Preparation of Inorganic Ceramic Coating Compositions
To the total weight of the coating composition, 0.1 to 10 wt% of zirco aluminate coupling agent was added to 28 to 39 wt% of colloidal silica sol, and 35 to 50 wt% of the alkoxysilane compound was further mixed with the mixture to hydrolyze, shrink and polymerize. The reaction was advanced to obtain a binder. The colloidal silica sol was composed of 20 to 33 wt% silica solids and 80 to 67 wt% water-soluble solvent, and a pH of 2 to 4 relative to the total weight thereof; As the alkoxysilane compound, a compound consisting of 56 to 67 wt% of methyltrimethoxysilane, 29 to 32.7 wt% of methyltriethoxysilane, and 0.3 to 14 wt% of glycidyloxypropyltrimethoxysilane was used based on the total weight thereof. .
Regarding the total weight of the coating composition on the binder, C1-C10 alcohol compound 8-25 wt%, functional filler 3-13wt%, silicone oil polymer 0.5-10wt%, ceramic powder 3-11wt%, and inorganic pigment 7-15wt% Mixing to prepare an inorganic ceramic coating composition of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020080111686A KR20100052824A (en) | 2008-11-11 | 2008-11-11 | Nonadhesive inorganic ceramic coating composition and coating method using the same |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020080111686A KR20100052824A (en) | 2008-11-11 | 2008-11-11 | Nonadhesive inorganic ceramic coating composition and coating method using the same |
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| KR20100052824A true KR20100052824A (en) | 2010-05-20 |
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| KR1020080111686A KR20100052824A (en) | 2008-11-11 | 2008-11-11 | Nonadhesive inorganic ceramic coating composition and coating method using the same |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101030150B1 (en) * | 2010-08-06 | 2011-04-18 | 김태웅 | A plate comprising amorphous ceramic coating layer, its use and method of manufacturing the same |
| KR101385975B1 (en) * | 2013-02-19 | 2014-04-21 | 주식회사 지티씨 | Coating composition for heating equipment's surface, and coating method using the same |
| KR101496160B1 (en) * | 2014-09-25 | 2015-02-26 | (주)삼광기업 | Non stick Ceramic coating agent composition and Heat-cooker using the same |
| US20200283908A1 (en) * | 2019-03-04 | 2020-09-10 | Momentive Performance Materials Inc. | Protective coating composition and coated metallic substrate comprising same |
| KR20200133058A (en) * | 2019-05-15 | 2020-11-26 | (주)네오플램 | Organic-inorganic hybrid coating composition applicable on the surface of pottery or porcelain instead of enamel coating and coating method using the same |
| KR102304273B1 (en) * | 2021-06-21 | 2021-09-23 | 정영주 | Manufacturing system of ceramic coating kitchen container and ceramic coating kitchen container thereof |
-
2008
- 2008-11-11 KR KR1020080111686A patent/KR20100052824A/en not_active Application Discontinuation
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101030150B1 (en) * | 2010-08-06 | 2011-04-18 | 김태웅 | A plate comprising amorphous ceramic coating layer, its use and method of manufacturing the same |
| WO2012018201A2 (en) * | 2010-08-06 | 2012-02-09 | Tae Woong Kim | A plate comprising an amorphous ceramic coating layer, its use and method of manufacturing the same |
| WO2012018201A3 (en) * | 2010-08-06 | 2012-05-03 | Tae Woong Kim | A plate comprising an amorphous ceramic coating layer, its use and method of manufacturing the same |
| KR101385975B1 (en) * | 2013-02-19 | 2014-04-21 | 주식회사 지티씨 | Coating composition for heating equipment's surface, and coating method using the same |
| KR101496160B1 (en) * | 2014-09-25 | 2015-02-26 | (주)삼광기업 | Non stick Ceramic coating agent composition and Heat-cooker using the same |
| US20200283908A1 (en) * | 2019-03-04 | 2020-09-10 | Momentive Performance Materials Inc. | Protective coating composition and coated metallic substrate comprising same |
| KR20200133058A (en) * | 2019-05-15 | 2020-11-26 | (주)네오플램 | Organic-inorganic hybrid coating composition applicable on the surface of pottery or porcelain instead of enamel coating and coating method using the same |
| KR102304273B1 (en) * | 2021-06-21 | 2021-09-23 | 정영주 | Manufacturing system of ceramic coating kitchen container and ceramic coating kitchen container thereof |
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