KR20160015527A - A coating agent containing natural sumac component for cooking vessel - Google Patents

Abstract

The present invention relates to a coating agent for a kitchen utensil which enables the production of kitchenware by adding natural sumac for preventing the propagation of bacteria, on an inorganic ceramic coating agent which can be plasticized at a relatively low drying temperature ranging from 60 to 160 degrees Celsius. The coating agent for kitchen utensil of the present invention includes: 65-78 wt% of an inorganic solution in which one or more silane, or an oligomer derived from the silnae is hydrolyzed and co-polymerized under the existence of a chemical compound selected from a group comprising particles of SiO_2 of a certain micron size and/or oxides of alkali and alkali earth metal and hydroxides; 10-19 wt% of a functional additive made of at least one material of potassium titanate or alumina for improving the physiochemical properties of the coating, and one or more mineral among tourmaline, red clay, sericite, amethyst, raw ore, muddy coal, natural ore, mordenite, kiyoseki, obsidian, elvan, light stone, or lava for the emission of far-infrared or anions; 1-2 wt% of a coloring agent; 2-15 wt% of a silicone-based oil polymer capable of complementing abrasion durability; and 0.5-5 wt% of natural sumac.

Description

[0001] The present invention relates to a natural coating composition containing natural lacquer,

The present invention relates to a coating agent for cooking utensils closely used in a kitchen, and more particularly, to a kitchen container coating agent containing a natural lacquer which is effective for a body to emit far-infrared rays and anions and exhibit excellent sterilizing effect.

In general, products such as pots, bowls, cups, plates, luminaire covers, sanitary containers, etc., which are used in electric and electronic cases and household items, are currently being manufactured in various forms such as plastic, stainless steel, aluminum alloy, Such products are most frequently encountered in everyday life, and therefore, the use of harmless and hygienic materials is of utmost importance.

Various cooking utensils such as microwave oven, meat grill pan, pans and frying pans which are closely related to various diets, household appliances such as drum type washing machine, heater, electric fan, refrigerator and iron, building materials, A variety of surface coating agents have been developed and used.

In particular, in the case of cooking utensils and household electrical appliances, acid resistance, abrasion resistance, durability, heat resistance, corrosion resistance, and the like are mainly required. These coatings can be classified into antimicrobial resin coatings, oxidation coloring or baking paints of inorganic enamel depending on the application.

For example, many cooking utensils coated with enamel have been proposed in order to improve heat resistance and prevent corrosion, but the coating agents used herein are excellent in corrosion resistance, abrasion resistance and heat resistance They are not focused on one, and are not coated with non-stick or easy-to-clean functions. In particular, the inorganic enamel coating agent is subject to thermal deformation because the drying temperature is as high as 850 to 1200 ° C, which is a limitation in use.

In recent years, studies have been actively carried out to apply functional materials to resin products in various living products. However, the techniques of applying such conventional coating materials are limited in their application range depending on their characteristics, And have not been widely applied. Particularly, although the coating agents proposed so far have been applied to daily necessities closely related to daily life, their functions are extremely small and their effects are not sufficiently exhibited, and their use ranges are extremely limited.

Teflon (PTFE), which is one kind of fluorine resin, has a low hardness (2H or less) and a low continuous operating temperature (320 ℃ or less) The usage has continued to increase. However, the Environmental Working Group (EWG), an environmental organization in the United States, has published a test showing that canary birds died instantaneously in poisonous gas generated by cooking with a Teflon coated container.

The ceramic coating agent, which appeared in the late 1980s, has been used for architectural and thermal applications because it has excellent heat resistance, water resistance, oil resistance, chemical resistance, hardness and abrasion resistance by coating the ceramic powder with a thermal firing method. It is less used than the fluorine resin in the interior coating for the kitchen and the special coating for the industrial use.

Patent No. 0518163, which is registered by the present applicant, discloses a method of coating a surface of a metal or a plastic substrate so as to be hygienic, harmless to the human body, enhancing non-tackiness and cleaning easiness, An inorganic ceramic coating agent has been proposed.

However, despite the fact that various functional coating agents as well as an excellent coating agent having a cleaning easiness are emitted as far as the above-described patent discloses far-infrared rays and negative ions, it is impossible to prevent the propagation of germs attached to the surface of the kitchen container .

On the other hand, although lacquer is used for medicinal purposes, it has been used as a paint for wood products for a long time. Lacquer is strong against heat or direct sunlight after curing, has excellent chemical resistance, and has a high hardness. Therefore, it has an advantage of keeping the initial state without deteriorating or damaging the coating for a long time. Such lacquer is mainly used for wood products such as raised lacquer. When lacquer is applied to a wood product, the lacquer penetrates into the fibers of the wood product and the lacquer is integrated with the wood product, so that the lacquer is not easily peeled off from the wood product.

As described above, although a solid coating film is formed by lacquer on wood products, unlike wooden products, there is a disadvantage that lacquer is easily peeled off in a metal product having smooth surface and no pores on the surface.

DISCLOSURE OF THE INVENTION Accordingly, the present invention has been made to solve the above problems, and it is an object of the present invention to provide an inorganic ceramic coating agent capable of firing at a relatively low temperature, Which is capable of producing a hygienic kitchen container product by coating it on a kitchen container.

It is another object of the present invention to provide a kitchen container coating agent which has cleaning easiness and non-adhesive property and has added functionality so that far-infrared rays and anions effective on the human body can be released.

Another object of the present invention is to provide a kitchen container coating agent containing natural lacquer that can be easily coated on the surface of a kitchen container such as a plastic container as well as a metal container because it can be baked at a relatively low temperature.

In order to achieve the above object, the present invention relates to a process for the production of an oligomer comprising at least one silane or an oligomer derived therefrom, which comprises oxides and hydroxides of silicon dioxide (SiO ₂ ) particles and / or alkali and alkaline earth metals of a predetermined micron size 65 to 78 wt% of an inorganic acid solution hydrolyzed and condensed in the presence of one or more compounds selected from the group consisting of the following compounds, 10 to 19 wt% of a functional filler for improving the physical and chemical properties of the coating film, 1 to 2 wt% 0.5 to 10 wt% of a nano-sized titanium oxide capable of exhibiting a photocatalytic function, 2 to 15 wt% of a silicone oil polymer capable of compensating for slipperiness and cleaning property, and 0.5 to 5 wt% of a natural lacquer The obtained kitchen container coating agent is provided.

Here, the inorganic solution may be prepared by mixing 1 to 10 parts by weight of fluorosilane with 100 parts by weight of at least one material selected from methyltrimethoxysilane or tetraethoxysilane, adding 40 to 50 parts by weight of silica sol thereto The solution is stirred for a predetermined time, and then a solution obtained by an exothermic reaction is used.

Further, the silicone oil polymer is characterized by being made of, for example, a water-soluble silicone oil as a material capable of imparting slip and abrasion resistance. The nano-sized titanium oxide has a particle size of 1 to 100 nm.

The present invention has the following effects.

First, by applying sol-gel method to the coating solution obtained by prescribing silicone polymer in an inorganic solution containing fluorosilane, it is applied to kitchen appliances by adding natural lacquer to the product, so that it has excellent antimicrobial and insecticidal effect And it is possible to produce hygienic kitchen utensils capable of preventing discoloration.

Secondly, it is possible to maximize the function of the applied product by excellent effect of far-infrared ray radiation effect, non-sticking property and cleaning ability, and it is possible to provide kitchen appliances which are protected from discoloration due to the appearance of a blackish- Can be produced.

Third, the present invention can be applied to the surface of a plastic container as well as a metal container because the drying temperature can be relatively low-temperature baked at a room temperature to 160 ° C, is hygienically good as a surface coating agent, This is easy.

The above-mentioned objects, features and advantages will become more apparent from the following detailed description in conjunction with the accompanying drawings. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, preferred embodiments of the present invention will be described.

The kitchen container coating agent according to the present invention has properties such as non-adhesive property and cleaning easiness to the inherent physical properties of the ceramic coating agent, and at the same time, the natural red lacquer which is effective for the human body and emits far infrared rays and negative ions, And coating the surface of the metal substrate to improve the functionality of the final container product.

Before describing the coating composition of the present invention, the starting material structure and principle of the inorganic solution will be described with reference to the following formula (1).

[Chemical Formula 1]

R _n Si (OR ') _4-n : As alkoxysilane

R '= methyl group, ethyl group, phenyl group, CF ₃ CH ₂ CH ₂ , CF ₃ (CF ₂ ) ₅ CH ₂ CH ₂ , CF ₃ (CF ₂ ) ₇ CH ₂ CH ₂ , Ethyl group, phenyl group and the like.

In the above formula, OR 'is a hydrolyzable alkoxy group, which is hydrolyzed by water or moisture in the air and adsorbed water on the surface of the material to produce a silanol group (Si-OH). This silanol group is bonded to the material by forming an oxane bond (Si-O-M) between the surface (M-OH) of the material.

Here, the reaction is controlled by controlling the reaction rate with a catalyst, a solvent, and the amount of water to make a binder, and then a silicone oil, a filler, an inorganic pigment, a viscosity adjusting agent, a functional additive, a sedimentation inhibitor, It is made of the most suitable coating material.

The principle of the non-stick coating agent of the present invention is as follows.

The present invention strongly binds to inorganic silicon with a stable inorganic axis comprising silicon-oxygen.

As shown in <Table 1>, as shown in the following <Table 1>, since the bonding energy is high, it exhibits heat-stable characteristics and non-stickiness, water resistance, chemical resistance, abrasion resistance and hardness characteristics are exhibited from the characteristics of silicon and fluorine.

In addition, the silicon-oxygen-silicon (Si-O-Si) bond is flexible and resilient, resulting in excellent cold resistance and repeated thermal shock. The silicone oil polymer is added thereto to reinforce its function.

As shown in <Table 2>, as the degree of substitution of fluorine in the alkyl group of the structure constituting the main skeleton of the coating is low, the tensile strength of the critical surface is low (the contact angle of the liquid is large) (Non-stick) has good surface properties. Such structural properties are also excellent in water repellency, water resistance and oil repellency in addition to non-stickiness.

 Binding energy between each molecule Combination Energy (Kal / mol) Length (Å) Si-H 76 1.48 Si-O 108 1.63 Si-F 135 1.54 C-C 83

 Chemical structure and critical surface tension Chemical structure of surface Critical surface tension (dyn / cm) CF ₃ (monomolecular film) 6 CF ₂ H (monomolecular film) 15 -CF ₂ - 18 -CH ₂ - 31

The process for preparing the inorganic ceramic coating composition according to the present invention will be described below with reference to the structure and principle of the material described above.

(Example)

The coating composition according to the present invention comprises an oligomer derived from one or more silanes of the following formula ( ₂ ) from a group consisting of micron-sized silicon oxide (SiO ₂ ) particles and / or oxides and hydroxides of alkali and alkaline earth metals 10 to 19 wt% of a functional filler to improve the physical and chemical properties of the coating film in 65 to 78 wt% of the condensed polymer solution after hydrolysis and polycondensation in the presence of one or more selected compounds, 2 to 15% by weight of a silicone oil polymer and 0.5 to 5% by weight of a natural lacquer component, which can compensate for 1 to 2% by weight of a pigment component and abrasion resistance and ease of cleaning.

In the present invention, the coating composition as described above is coated on the surface of a metal or plastic substrate and thermally densified to form an inorganic coating film.

(2)

RnSiX4-n

Here, X is the same or different and is a hydrolyzable group or a hydroxy group, the radicals R are the same or different and each represents hydrogen, an alkyl group having less than 10 carbon atoms, and n is 0 or 1 or 2, .

The inorganic solution is prepared, for example, by mixing 30 to 50 parts by weight of silica sol with respect to 100 parts by weight of one selected from methyltrimethoxysilane or tetraethoxysilane. As another example, 1 to 10 parts by weight of fluorosilane is mixed with 100 parts by weight of one selected from the methyltrimethoxysilane or tetraethoxysilane, and 30 to 50 parts by weight of silica sol is further mixed therewith .

When the methyltrimethoxysilane and tetraethoxysilane are mixed to form a binder, the ratio of methyltrimethoxysilane to tetraethoxysilane is preferably 2: 1 (preferably 33 to 47 wt%: 17 To 23 wt%).

When the methyltrimethoxysilane and the tetraethoxysilane are added to the binder in an amount of 33 to 47 wt% and 17 to 23 wt% or less, respectively, the reactivity of the binder is lowered. If the amount is exceeded, And the physical properties of the binder deteriorate. Therefore, the binder having the best physical properties can be obtained only when it is added in the above range.

When the silica sol is added in an amount of 30 to 50 wt% or less, the bonding force of the silicon-oxygen-metal (Si-O-Metal) between the methyltrimethoxysilane and the tetraethoxysilane is weak, It is preferable to mix them within the above-mentioned range.

In the embodiment of the present invention, in order to control the viscosity and the reaction rate of the solution during the process of preparing the binder mixture, any one selected from methanol, ethanol, isopropanol or an alcohol mixture may be adjusted to be in the range of 10 to 15 wt% have.

As the functional additive, potassium titanate or alumina is used to enhance physicochemical properties such as durability, aging resistance and abrasion resistance. In addition, one or more far infrared minerals selected from natural minerals of quartz-mononite, gneiss and rhyolitic tuff, tourmaline, loess, sericite, amethyst, ore, bamboo, queen, quartz, obsidian, A far infrared ray and an anion mineral composed of at least one selected from natural stone materials selected from lava, gemstone or seaweed charcoal or charcoal, and a photocatalyst material may be added to add a special function. These particles have a needle-shaped or plate-like shape, and prevent cracking of the coating film between the binders or control the viscosity of the coating agent. If the functional additive is added in an amount of 10 wt% or less based on the total weight of the composition, it may cause a decrease in gloss and adhesion. If the content of the functional additive is more than 19 wt% based on the total weight of the composition, the surface of the coating may become rough, It is preferably added in the range of 10 to 19 wt% with respect to the total weight part.

The silicone-based oil polymer is intended to impart slipperiness (ease of cleaning) and abrasion resistance, and is made of, for example, one or more materials selected from water-soluble silicone oils.

When such a silicone oil polymer is added in an amount of 2 wt% or less based on the total weight of the silicone oil polymer, the effect of improving slip and abrasion resistance is negligible, and when added in an amount of 15 wt% or more based on the total weight of the silicone oil polymer, It is possible to improve the slip property and the abrasion resistance and to prevent the change of the state of the coating film and to maintain the adhesion strength strongly when it is added in the range of 2 to 15 wt% with respect to the whole weight part.

Further, in the embodiment of the present invention, 0.5 to 10 wt% of fine particle titanium oxide having a particle size of 1 to 100 nm is further added to the mixture, so that the photocatalytic function can be exerted.

When the amount of the titanium oxide is less than 0.5 wt%, the function as a photocatalyst can not be exhibited. When the amount is 10 wt% or more, the function of the photocatalyst, which is very expensive, is less economical.

In order to exhibit the photocatalytic function, the titanium oxide particles having a particle size of 1 to 100 nm should be used.

When the amount is less than 0.5 wt% based on the total weight of the lacquer component, the antimicrobial and insect repellent effect is insignificant.

The production process of the present invention composed of the above composition will be described.

First, a mineral solution as a coating agent is prepared as follows.

In this embodiment, a manufacturing process of a silicon oxide (SiO ₂ ) sol is described as an example.

Based on 100 parts by weight of at least one selected from the group consisting of methyltrimethoxysilane and tetraethoxysilane or a mixture thereof (a material obtained by mixing methyltrimethoxysilane with tetraethoxysilane in a ratio of 33-47: 17-23 wt) And 1 to 10 parts by weight of fluorosilane are mixed, and 30 to 50 parts by weight of silica sol are mixed and stirred. The mixed solution is exothermically reacted at about 40 to 50 ° C by chemical reaction, and becomes clear transparent liquid after about 5 to 10 minutes in a cloudy state during the reaction. At this time, in order to control the viscosity and the reaction rate of the solution, any one selected from the group consisting of methanol, ethanol, isopropanol or alcohol mixture can be adjusted by adjusting the concentration in the range of 10 to 15 wt%, and the sol- .

At least one functional filler selected from potassium titanate or alumina is added to 65 to 78 wt% of the inorganic solution in order to enhance the physicochemical properties of the coating solution to the inorganic solution formed by bonding the binder and the silica sol through the above- And 1 to 2 wt% of a pigment for imparting color and 0.5 to 10 wt% of titanium oxide having a size of 1 to 100 nm, 2 to 15 wt% of a silicone oil polymer and 0.5 to 5 wt% of a lacquer to give a photocatalytic property, The inorganic ceramic mixture is formed by a chemical reaction.

At this time, the silicone oil polymer should be water-soluble and its function should be maintained after film formation.

The mixed solution prepared by the above inorganic ceramic mixture manufacturing process is firstly stirred and then homogenized in a homogenizer for about 1 to 2 hours while stirring at a high speed. Thereafter, a mesh of about 325 to 1000 meshes Mixing and filtration to extract the filtered particles as a coating agent is completed to complete the coating agent production.

The inorganic ceramic coating composition of the present invention prepared by the above-described series of processes is applied to the surfaces of various kitchen container substrates using a spray gun having a nozzle diameter of 1.0 to 1.2 under a pressure of 6 to 7 kg / And then baked at 160 to 180 ° C. for 20 to 30 minutes to form a silicon-oxygen-metal (Si-O-Metal) bond and chemically bond firmly.

When heat is applied to the substrate coated with the inorganic ceramic coating composition, various inorganic components contained in the coating form a layered structure to form a ceramic film having a harder silicon-oxygen-metal bond, so that the substrate and the coating layer are peeled from each other Is not generated.

The following Tables 3 to 5 are test reports to which the coating agent of the present invention is applied to various daily necessities.

 Examples applied to protective cover of fan type heater: deodorization test  Test Items unit Results Test Methods Ammonia 0 hr vol ppm 50 Room temperature: 21 ± 5 ℃ Ammonia 0.5 hr vol ppm 41 Ammonia 1 hr vol ppm 37 Ammonia 2 hr vol ppm 36 Ammonia 4 hr vol ppm 34 Ammonia 6 hr vol ppm 34

Registration number TBH-000710 / Korea Testing and Research Institute for Chemical Industry / 2003.11.14

 Example applied to polyurethane filter: deodorization test Test Items unit Results Test Methods ammonia Degree 4 Quality assurance inspection standard Acetic acid Degree 3 Tobacco smoke Degree 2 Trimethylamine Degree 4

Registration number TAH-003725 / Korea Testing and Research Institute for Chemical Engineers / November 11, 2003

 Examples of application to heater for washing machine: Non-stick test Scale as Hardness (as CaCO3) and Total Solid Results Test Items unit General heater Coating heater Test Methods Hardness (CaCo ₃ ) mg / L 5110 616 APHA Total Solid mg / L 3880 312 KS M 0100

 Registration number TBH-000715 / Korea Testing and Research Institute for Chemical Industry / November 22, 2003

While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Will be apparent to those skilled in the art to which the present invention pertains.

Claims (3)

An oligomer derived from one or more silanes can be hydrolyzed in the presence of one or more compounds selected from the group consisting of oxides and hydroxides of alkali metal and alkaline earth metals and silicon oxide (SiO2) particles of a predetermined micron size Alumina, tourmaline, yellowstone, sericite, amethyst, ore, bamboo, quartzite, quartzite, cadmium, and cadmium for the release of potassium titanate, alumina, far infrared ray or anion to improve the physical and chemical properties of the coating, 10 to 19% by weight of a functional additive composed of at least one material selected from the group consisting of at least one of minerals selected from the group consisting of Guiyang stone, obsidian, elvan stone, gwangmyeong stone, lava stone and ghost stone, 1 to 2% by weight of pigments for coloring, slip property and abrasion resistance Which is obtained by adding 2-15 wt% of a silicone oil polymer and 0.5-5 wt% of a natural lacquer, Container coating agent.
The method according to claim 1,
The present invention also relates to a kitchen container coating agent containing natural lacquer, which is characterized in that 0.5 to 10 wt% of nano-sized titanium oxide capable of exhibiting a photocatalytic function is further added.
3. The method according to claim 1 or 2,
Wherein the plastic container is coated on a plastic container.