Ceramic coating agent composite having excellent durability

Abstract

The present invention relates to a ceramic coating composition with improved durability, and more specifically, to a ceramic coating composition with improved durability that can have excellent film durability, particularly under high temperature and high pressure conditions, as well as non-stick and cooking durability, by applying a polymethylsilsesquioxane-grafted silicone resin to the ceramic coating.

Description

Technology Field

[0001] The present invention relates to a ceramic coating composition with improved durability that can have excellent film durability, particularly under high temperature and high pressure conditions, as well as non-stick and cooking durability. Background Technology

[0003] Generally, various coating agents are being developed and used to enhance the functionality of various cooking utensils closely used in daily life, such as pots, frying pans, rice cookers, microwave ovens, and grills; household goods, such as heaters, fans, refrigerators, and irons; as well as building materials, health aids, and industrial products.

[0005] In particular, for cooking utensils and household goods, acid resistance, wear resistance, durability, heat resistance, and corrosion resistance are primarily required, and ceramic coating agents are widely used for this purpose.

[0007] In Patent Document 1, which is a related prior art, an inorganic ceramic coating composition is proposed by adding a functional filler, ceramic powder, and pigment to a silicon mixture containing silane, silicon oxide, and water used as a binder. However, when a coating layer is formed on a heating cooking utensil or the like using such an inorganic ceramic coating composition, the firing temperature must be high to improve the bonding strength of the coating layer, and there is a problem of reduced durability due to the hydrophilic characteristics of the silicon mixture used as a binder, which consists of silicon oxide and water.

[0009] In addition, Patent Document 2 proposes a technology for forming a coating layer on kitchenware and home appliances using an inorganic ceramic coating composition with enhanced non-stick and easy-to-clean properties, which consists of an inorganic solvent, a functional additive, a silicone-based oil polymer, and a pigment. However, when a coating layer is formed on kitchenware and home appliances using such an inorganic ceramic coating composition, the bonding strength of the coating layer decreases, and the sintering density is reduced, so there is a problem in that the coating layer peels off due to cracks or other factors during long-term use. Prior art literature

[0011] Patent Document 1: Korean Registered Patent Publication No. 10-512599 "Composition of an inorganic ceramic coating agent emitting negative ions and far-infrared radiation" Patent Document 2: Korean Published Patent Publication No. 10-2005-0072928 "Composition of an inorganic ceramic coating agent with enhanced non-stick and ease of cleaning functions" The problem to be solved

[0012] The present invention aims to solve the aforementioned problems by applying a polymethylsilsesquioxane-grafted silicone resin to a ceramic coating agent, thereby enabling not only non-stick and cooking durability but also excellent film durability, particularly under high temperature and high pressure conditions. means of solving the problem

[0014] The present invention provides a ceramic coating composition with improved durability, characterized by including a poly(methylsilsesquioxane) grafted silicone resin in the ceramic coating composition, as a means of solving the problem.

[0016] Here, the polymethylsilsesquioxane-grafted silicone resin is preferably formed by mixing 5 to 15 parts by weight of reactive siloxane and 0.5 to 2.0 parts by weight of catalyst with respect to 100 parts by weight of silane, and then reacting 100 to 120 parts by weight of silicasol with respect to 100 parts by weight of the mixture.

[0018] More specifically, the above-mentioned ceramic coating composition with improved durability preferably consists of 7 to 12 parts by weight of a functional filler and 5 to 20 parts by weight of a pigment, based on 100 parts by weight of a polymethylsilsesquioxane-grafted silicone resin.

[0020] Meanwhile, the above functional filler is preferably used alone or in combination of two or more types from among potassium titanate, alumina, red clay, sericite, amethyst, raw ore, bamboo charcoal, Uiwang stone, Gwiyang stone, obsidian, maifan stone, Gwangmyeong stone, lava, and Gwisin stone, and the above pigment is preferably used alone or in combination of two or more types from among titanium dioxide, iron oxide, chromium oxide, and other organic and inorganic pigments. Effects of the invention

[0022] The present invention has the effect of providing not only non-stick and cooking durability, but also excellent coating durability, especially under high temperature and high pressure conditions. Specific details for implementing the invention

[0024] The present invention, for achieving the above effects, relates to a ceramic coating composition with improved durability. It should be noted that only the parts necessary to understand the technical configuration of the present invention are described, and the description of other parts is omitted so as not to distract from the gist of the present invention.

[0026] Hereinafter, the ceramic coating composition with improved durability according to the present invention will be described in detail as follows.

[0028] The present invention is characterized in that the ceramic coating composition comprises a poly(methylsilsesquioxane) grafted silicone resin, and more specifically, is composed of 7 to 12 parts by weight of a functional filler and 5 to 20 parts by weight of a pigment with respect to 100 parts by weight of the poly(methylsilsesquioxane) grafted silicone resin.

[0030] The above polymethylsilsesquioxane-grafted silicone resin is added to improve the durability of the coating agent and is formed by mixing 5 to 15 parts by weight of reactive siloxane and 0.5 to 2.0 parts by weight of catalyst with respect to 100 parts by weight of silane, and then reacting 100 to 120 parts by weight of silicasol with respect to 100 parts by weight of the mixture.

[0032] That is, considering that silanol groups (-OH) are generated through the hydrolysis of silane, the reactive group (-R) of reactive siloxane and poly(methylsilsesquioxane) generated through the hydrolysis of the silane are grafted, and silica sol reacts therewith to produce a silicone resin grafted with poly(methylsilsesquioxane).

[0034] Here, the silane may be methyltrimethoxysilane, glycidoxypropyl trimethoxysilane, trimethylethoxysilane, ethyltriethoxysilane, or phenyltriethoxysilane, and the catalyst may be formic acid, nitric acid, hydrochloric acid, or platinum catalyst, but is not necessarily limited thereto and various already known silanes and catalysts may be applied.

[0036] Meanwhile, if the content of each material for manufacturing the polymethylsilsesquioxane-grafted silicone resin falls outside the above range, there is a concern that the polymethylsilsesquioxane may not be properly grafted. In addition, the hydrolysis or condensation reaction methods or processes are within a known range and are not limited to a specific method, allowing for the application of various known methods.

[0038] The above functional filler serves to prevent cracks in the coating film and improve the physical and chemical properties of the coating film by controlling viscosity, and can be used alone or in combination of two or more types among potassium titanate, alumina, red clay, sericite, amethyst, raw ore, bamboo charcoal, Uiwang stone, Gwiyang stone, obsidian, maifan stone, Gwangmyeong stone, lava, and ghost stone.

[0040] Meanwhile, if the content of the above-mentioned functional filler is less than 7 parts by weight, there is a concern that the gloss or adhesion of the coating film may decrease, and if it exceeds 12 parts by weight, there is a concern that adverse effects may occur, such as the surface of the coating film becoming rough.

[0042] Meanwhile, functional fillers have the advantage of having needle- or plate-like particle forms, which prevent cracking of the coating film between binders or regulate the viscosity of the coating agent.

[0044] The above pigment is added to express the color of the coating layer and may be used alone or in combination of two or more types among titanium dioxide, iron oxide, chromium oxide, and other organic or inorganic pigments, but is not necessarily limited thereto and may use pigments of various colors according to the requirements of the producer or consumer. Meanwhile, if the content of the above pigment falls outside the above range, there is a concern that the desired color expression (saturation, brightness, etc.) may not be properly achieved.

[0046] Meanwhile, the mixing order and process order of each of the above compositions are not specifically limited and can be applied variably depending on the target of use, usage environment, and user convenience of the coating agent.

[0048] Hereinafter, the present invention will be explained in more detail based on the following examples, but the present invention is not limited by the examples.

[0050] 1. Preparation of a ceramic coating composition

[0052] (Example 1)

[0053] A ceramic coating agent was prepared by mixing 7 parts by weight of potassium titanate, a functional filler, and 5 parts by weight of titanium dioxide, a pigment, with 100 parts by weight of a polymethylsilsesquioxane-grafted silicone resin and aging the mixture at 40°C for 2 hours and 30 minutes. At this time, the polymethylsilsesquioxane-grafted silicone resin was prepared by mixing 5 parts by weight of a reactive siloxane and 0.5 parts by weight of hydrochloric acid as a catalyst with 100 parts by weight of methyltrimethoxysilane, and then reacting 100 parts by weight of silica sol with 100 parts by weight of the mixture.

[0055] (Example 2)

[0056] A ceramic coating agent was prepared by mixing 12 parts by weight of alumina, a functional filler, and 20 parts by weight of iron oxide, a pigment, with 100 parts by weight of a polymethylsilsesquioxane-grafted silicone resin and aging at 23°C for 12 hours. At this time, the polymethylsilsesquioxane-grafted silicone resin was prepared by mixing 15 parts by weight of reactive siloxane and 2.0 parts by weight of hydrochloric acid as a catalyst with 100 parts by weight of methyltrimethoxysilane, and then reacting 120 parts by weight of silica sol with 100 parts by weight of the mixture.

[0058] (Comparative Example 1)

[0059] It was prepared in the same manner as Example 1, but a silicone resin that was not grafted with polymethylsilsesquioxane was used.

[0061] (Comparative Example 2)

[0062] It was prepared in the same manner as Example 2, but a silicone resin that was not grafted with polymethylsilsesquioxane was used.

[0064] 2. Evaluation of Ceramic Coating Composition

[0066] PCT (high pressure test), salt water boiling, non-stick durability, abrasion resistance, and cooking tests were conducted on the above examples and comparative examples, and the test standards and results are as shown in [Table 1] below.

[0068] division Example 1 Example 2 Comparative Example 1 Comparative Example 2 Test standards PCT test Gloss retention (Pass) Gloss retention (Pass) Loss of gloss (Failure) Loss of gloss (Failure) Using a PCT (Pressure Cooker Test) device (100 hours at a temperature of 121℃, 100% relative humidity, and 2 atm pressure) Saltwater boiling non-stick durability 78 hours 81 hours 30 hours 28 hours KSD 8303 Wear-resistant non-stick 2,800 cycles 2,700 cycles 1,000 cycles 1,100 cycles BS 7069 / 1998 Cooking test Passed more than 1,000 times Passed more than 1,000 times Failed after 300 attempts Failed after 300 attempts 1st time - Fried egg (3 minutes)

[0070] As shown in [Table 1] above, it can be seen that the embodiments of the present invention, by applying a polymethylsilsesquioxane-grafted silicone resin, can have excellent coating durability, particularly under high temperature and high pressure conditions, as well as non-stick and cooking durability compared to the comparative examples.

[0072] As described above, although the excellence of the ceramic coating composition with improved durability according to the present invention has been explained in detail through the above examples, it will be understood that the present invention is not necessarily limited to the above configuration, and that the present invention can be variously substituted, modified, and changed within the scope of the technical concept of the present invention.

Claims

Claim 1 A ceramic coating composition comprises a poly(methylsilsesquioxane) grafted silicone resin, wherein the poly(methylsilsesquioxane) grafted silicone resin is Methyltrimethoxysilane Per 100 parts by weight, reactive siloxane Characterized by mixing 5 to 15 parts by weight and 0.5 to 2.0 parts by weight of a catalyst, and then reacting 100 to 120 parts by weight of silicasol with respect to 100 parts by weight of the mixture. go, The above reactive siloxane is characterized by comprising a reactive group (-R) that is grafted onto a silanol group (-OH) generated by the hydrolysis of the above methyltrimethoxysilane, and The above catalyst is characterized by comprising formic acid, nitric acid, hydrochloric acid, or a platinum catalyst, and The ceramic coating composition above is, Characterized by having a brine boiling nonstick durability of 78 to 81 hours and an abrasion nonstick durability of 2,700 to 2,800 cycles based on a Pressure Cooker Test conducted for 100 hours at a temperature of 121℃, 100% relative humidity, and 2 atm atmospheric pressure. Ceramic coating composition with improved durability. Claim 2 delete Claim 3 A ceramic coating composition with improved durability according to claim 1, characterized in that the composition comprises 7 to 12 parts by weight of a functional filler and 5 to 20 parts by weight of a pigment, based on 100 parts by weight of a polymethylsilsesquioxane-grafted silicone resin. Claim 4 my 3 A ceramic coating composition with improved durability, characterized in that, in the above, the functional filler is used alone or in combination of two or more types selected from potassium titanate, alumina, red clay, sericite, amethyst, raw ore, bamboo charcoal, Uiwang stone, Gwiyang stone, obsidian, maifan stone, Gwangmyeong stone, lava, and Gwisin stone, and the pigment is used alone or in combination of two or more types selected from titanium dioxide, iron oxide, and chromium oxide.

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