KR20170122685A - Components Of Non-adhesion Typed Ceramic Paint - Google Patents

Abstract

The present invention relates to: a mineral paint composition, when coated on the surface of a metal or a nonferrous metal, which has very excellent non-adhesion, and has high thermal conductivity and semi-permanent non-adhesive performance; a manufacturing method thereof; and a kitchen container coated with the same. The ceramic coating composition having semi-permanent non-adhesive performance according to the present invention comprises 30 to 68 wt% of an inorganic binder, 3 to 30 wt% of a known heat radiation functional additive and pigment, and 2 to 15 wt% of a non-adhesive silane-modified body, wherein tetramethoxysilane, methyltrimethoxysilane and methyltriethoxysilane are used as a curing agent.

Description

TECHNICAL FIELD [0001] The present invention relates to a non-adhesive ceramic coating composition,

TECHNICAL FIELD The present invention relates to a ceramic paint coating composition, and more particularly, to a ceramic paint coating composition having high thermal conductivity and excellent non-tackiness.

Kitchen appliances have been used in various ways to coat metal or nonferrous metal surfaces in order to prevent heat from cooking and to prevent food from sticking to kitchen appliances.

Coatings used in coatings have been divided into inner coatings, which directly contact food during cooking, and outer coatings, which do not directly contact food, but which are important in appearance and color.

In particular, the inner coating agent has been developed for easy cleaning and harmless to the human body since the food is directly contacted with the cooking appliance during cooking, and the outer coating agent has been developed with a heat resistant function that can withstand high heat when cooked and has an excellent appearance It is true.

For this purpose, Teflon coatings using fluorine-containing materials are the main products for kitchen appliances, and silicone heat-resistant coatings using silicone resin have been developed for external use.

Korean Patent Laid-Open No. 10-2008-0092860 discloses an EMULSION paint manufacturing technique in which fluororesin particles are dispersed. The fluororesin is polytetrafluoroethylene (PTFE), which is well known for its Teflon coating. It is coated on the inside of the cooker with this technology and has excellent non-stickiness when cooked with a cooker. It has been a lot of love for the interior coating of cookware.

The reason for this is as follows. As shown in FIG. 4, the fluororesin coated inside the kitchen appliance is formed by connecting four floods centering on carbon (C). The interatomic distance between CFs is 0.13 to 0.15 nm and the CF bonding force is 108 KCAL / J, which has the strongest attraction among all the compounds, and thus has a principle in which contaminants easily fall off. However, these PTFE resin coatings have been found to limit the use of PFOA, which is a carcinogen in hot weather, in the world.

Also, since the hardness of such a coating is very low, the coating is easily peeled off by a tool used for cooking.

Korean Patent Laid-Open No. 10-2010-0052824 discloses a non-tacky ceramic coating composition comprising colloidal silica, a zirconium aluminate coupling agent, an alkoxysilane compound, a non-oxide filler and a silicone oil, and a coating method using the same .

This technology is a technique in which silicone oil is added to a ceramics coating agent which has been already disclosed for a long time, and the composition is coated on the inside of the kitchen container by using such a composition so that initial non-stickiness is excellent when food is cooked, but the silicone oil added is being cooked, So that the non-adhesive property can not be maintained for a long time.

In addition, Korean Patent Registration No. 10-0703881 discloses that, in order to compensate for the lack of hardness, which is one of the disadvantages of PTFE paints for non-tacky coatings in kitchen containers, general CERAMIC paints are used as bases and COATING PTFE transparent paints as top paints A cooking apparatus and a manufacturing method thereof are disclosed.

This technique is considered to solve the problem of hardness of conventional PTFE coatings to some extent, but it is inevitable that PFOA is generated when the PTFE resin layer is coated to solve non-tackiness.

The present invention aims to provide a kitchen container including a composition and a manufacturing method for a ceramics coating material harmless to the human body while imparting semi-permanent NON-STICK characteristics to the surface of a metal or a non-ferrous metal material. More specifically, the silicone oil does not migrate when cooking or cleaning the cooking device. It has no PFOA, is harmless to the human body, and surpasses the non-stick performance of the PTFE film. It has a high thermal conductivity and high non- A coating film coating composition and a kitchen container containing the same.

It is another object of the present invention to provide a cermic coating material which is coated on a metal or nonferrous metal kitchen container and has a heat radiation characteristic that can easily transmit a heat source, which is a metal or a non- do.

An object of the present invention is to provide:

30 to 68% by weight of an inorganic ceramic binder; 3 to 30% by weight of thermally conductive functional additives and pigments; And 2 to 5% by weight of a non-tacky silicone powder silane modification.

Another object of the present invention is to provide:

30 to 68% by weight of an inorganic ceramic binder; 3 to 30% by weight of thermally conductive functional additives and pigments; And 3 to 15% by weight of a non-tacky PTFE silane modification.

According to an aspect of the present invention,

The thermally conductive functional additive may be used alone or in combination of two or more among boron nitride, carbon nanotube, graphite, and molybdenum disulfide; The pigments may be extender pigments and inorganic pigments.

According to another aspect of the present invention,

The particle size of the boron nitride and the graphite is 10 mu m or less; The boron nitride may be hexagonal boron nitride (HBN) having a very low coefficient of friction, and the particle size of the molybdenum disulfide may be 65 μm or less.

According to still another aspect of the present invention,

The non-tacky silicone powder silane modification may be one obtained by reacting a partial hydrolyzate of silane with a silicone powder as an inorganic binder.

According to still another aspect of the present invention,

The silicon powder may have a particle size of 0.1 to 5 mu m.

According to still another aspect of the present invention,

The raw material of the non-tacky PTFE silane modification may include at least one of PTFE powder or PTFE emulsion.

According to still another aspect of the present invention, Further comprising an alkoxysilane curing agent;

Wherein the alkoxysilane curing agent comprises at least one of methyltrimethoxysilane, tetramethoxysilane, methyltriethoxysilane, and phenyltrimethoxysilane; The alkoxysilane curing agent may be blended in an amount of 30 to 100% by weight based on the weight of the coating material.

INDUSTRIAL APPLICABILITY According to the present invention, there is provided a coating composition for an environmentally friendly non-tacky ceramic paint which is applied to a kitchen container for metal or non-ferrous metal to impart semi-permanent non-tacky characteristics and does not migrate silicone oil.

In addition, the ceramic coating agent for kitchen containers according to the present invention and the kitchen appliance including the same have excellent infrared ray emissivity and the material is excellent in heat conductivity from a heat source. In addition to shortening the cooking time during cooking, Let it cook.

In addition, the present invention is coated with PTFE between silicon beads and beads without releasing PFOA, and makes it possible to maintain the non-stickiness property semi-permanently by further maintaining the lubricity of the silicon beads during cooking.

1 is a diagram illustrating a manufacturing process of a non-tacky ceramic coating agent for a kitchen appliance manufactured according to the present invention.
2 is a photograph of a ceramic coating composition for a kitchen appliance manufactured by the present invention, which is painted using a suitable painting machine.
3 is a reaction formula showing the molecular structure of the partially hydrolyzed inorganic sol binder (solution 1).
4 is a structural formula showing the molecular structure of the fluororesin.
Fig. 5 shows the structure of a non-adhesive silicone powder silane modified product which is a reaction product of the partially hydrolyzed inorganic sol (solution 1) and the non-tacky silicone powder.
Figure 6 is the structure of a non-tacky PTFE silane modification that is a reaction product of partially hydrolyzed inorganic sol (solution 1) and PTFE.
FIG. 7 shows the structure of the final coating material by secondary chemical bonding (network) between the non-tacky silicone powder silane modification, the partially hydrolyzed inorganic sol binder and the cured product of the alkoxysilane (curing agent).
Figure 8 shows the structure of the final paint by secondary chemical bonding (network) between the non-tacky PTFE silane modification, the partially hydrolyzed inorganic sol binder and the cured product of the alkoxysilane (curing agent).

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to an environmentally friendly ceramic coating agent which exhibits semi-permanent non-tackiness.

In order to exhibit the performance of such a film composition, the manufacturing process for each stage mentioned above is very important, and in order to explain the present invention in more detail, the manufacturing method for each solution is as follows. In order to attain the object of the present invention, first, an inorganic binder is produced by the following method.

The non-tacky ceramic coating composition of the present invention basically comprises 30 to 68% by weight of an inorganic ceramic binder;

3 to 30% by weight of thermally conductive functional additives and pigments; 2% to 5% by weight of a non-tacky silicone powder silane modified by chemically bonding the non-tacky silicone powder to the silane. Whereby a secondary chemical bond between the non-tacky silicone powder silane modification, the inorganic ceramic binder and the alkoxysilane is provided.

The present invention also relates to a composition comprising 30 to 68% by weight of an inorganic ceramic binder; 3 to 30% by weight of thermally conductive functional additives and pigments; 3 to 15% by weight of a non-tacky PTFE silane modified by reacting a non-tacky PTFE emulsion with a silane; And a secondary chemical bond between the non-tacky PTFE silane modification and the inorganic ceramic binder is provided.

The thermally conductive functional additive may be used alone or in combination of two or more of boron nitride, carbon nanotube, graphite, and molybdenum disulfide; The pigments may be extender pigments and inorganic pigments.

The particle size of the boron nitride and the graphite is 10 mu m or less; The boron nitride may be hexagonal boron nitride (HBN), and the particle size of the molybdenum disulphide may be 65 탆 or less.

Also, the non-tacky silicone silane powder modified product is obtained by chemical bonding by reacting a non-tacky silicone powder with an inorganic binder and a partial hydrolyzate of silane.

Finally, the non-tacky ceramic coating composition of the present invention further comprises an alkoxysilane curing agent according to any one of claims 1 and 2;

Wherein the alkoxysilane curing agent comprises at least one of methyltrimethoxysilane, tetramethoxysilane, methyltriethoxysilane, and phenyltrimethoxysilane;

Wherein the alkoxysilane curing agent is blended in an amount of 30 to 100% by weight based on the weight of the coating material.

Hereinafter, the production method will be specifically described with practical examples.

≪ Preparation process of inorganic ceramic binder (first solution) in which colloidal sol and silane were partially hydrolyzed to improve silane 1 to 5%

In order to make the semi-permanent non-tacky ceramic coating composition according to the present invention, a first solution, that is, an inorganic resin, that is, an inorganic binder, must be prepared. The production of the inorganic resin as the first solution includes a metal sol dispersed in water such as Si, Al, Ti, Zr and ion exchanged water or distilled water, an organic acid, and a solvent such as an alcohol and a glycol. The inorganic colloid sol-forming technique using inorganic colloidal sol has been known for several decades. The inorganic colloidal sol used in the present invention may be silica sol alone, or titanium, aluminum, zirconium, or a mixture of two or more thereof.

Wherein the inorganic ceramic binder (first solution) contains 50 to 60 wt% of silica sol (alkali or acidic), 0 to 5 wt% of other inorganic sol, 0.5 to 2 wt% of inorganic acid, , And 5 to 20 wt% of distilled water.

In this case, silacasol can be used both acidic and alkaline. When an inorganic type inorganic sol is used, an inorganic binder can be prepared without a catalyst. However, when an inorganic type sol is used, an organic or inorganic acid such as formic acid, Acetic acid, sulfuric acid, nitric acid, and acrylic acid are used as the organic acid, and the pH of the alkaline sol is adjusted to 8 to 10.

 When the pH of the inorganic sol is less than 8, the inorganic sol is not normally hydrolyzed and the metal may be precipitated during the polymerization and polymerization (hydrolysis) after the preparation of the coating. When the pH is more than 10, The viscosity of the coating material may rapidly increase. Suitably the pH of the inorganic binder is 8.5 to 9.5.

The inorganic sol is reformed with organic acid, and then the organoleptic silane compound represented by the following formula is added.

RnSi (Y) 4-n - (1)

Wherein R is an anil group having not more than 3 carbon atoms, Y is an alkoxy group having not more than 4 carbon atoms, and n is an integer of 1 to 3. The silane compounds include, for example, trimethoxysilane, methyltriethoxysilane, tetraalkoxysilane, tetraethylorthosilicate and the like. The amount of silane is about 1 to 5% And the surface of the inorganic sol is modified by decomposition. This solution is used not only as a main inorganic binder but also as a main constituent of the present patent, a siloxane network in which a non-tacky modified substance has a chemical bond and ptfe exist therein, thereby enabling a basic structure capable of exhibiting excellent non- . The structure of the partially hydrolyzed inorganic sol is shown in Fig.

If the partial hydrolysis rate is less than 1% of the inorganic solubility function, the metal part of the inorganic sol at the time of the hardening agent and POLYMELAZATION may be precipitated after the preparation of the coating. If the partial hydrolysis rate exceeds 5% Storage stability of BINDER does not come out.

For the stability and workability of the prepared inorganic ceramic binder (first solution), a solution in which one or more alcohols (isopropyl alcohol, methanol, ethanol, butyl cellosolve, propylene glycol, etc.) And the solvent used can be used in an amount of 2 to 20% by weight based on 100% by weight of the inorganic resin. When the amount of the solvent used is less than 2% by weight, the storage stability of the inorganic binder is deteriorated, If it is more than 20% by weight, gloss and hardness may be lowered when a coating film is formed after the production of the coating material, and it is suitably 5 to 10% by weight based on 100% by weight of the inorganic binder.

In order to complete the object of the present invention, a mill base paint is prepared using an inorganic resin in the next step.

Manufacturing process of <mill base paint (or PTA. second solution)>

The dispersing agent, pigment, functional additive, extender pigment, and solvent are sequentially added to 100 parts by weight of the inorganic ceramic binder (first solution), and the mixture is free-mixed and then dispersed by means of a dispersing machine such as ring mill to have an average particle size of 10 microns or less To prepare a second solution (PTA vehicle).

The second solution for making the semi-permanent non-tacky ceramic coating composition according to the present invention uses a high thermal conductive functional additive and inorganic resin. That is, the second solution contains 40 to 70% by weight of an inorganic binder, 5 to 30% by weight of an extender pigment, 5 to 25% by weight of a thermally conductive functional additive and 5 to 25% by weight of a pigment, 0.1 to 3% .

When the content of the inorganic resin is 40 to 70% by weight, the viscosity of the coating is too high when the content is less than 40% by weight and the workability of spraying is reduced. When the content is more than 70% by weight, And suitably 50 to 60% by weight

Next, a dispersant is used. In addition to facilitating the dispersion of pigments and extender pigments, such a dispersant also serves as a bridge to prevent layer separation when mixed with a second solution, which will be described later, 37K, 378M, 345, 333, and the like can be used, and FSM of 3M Co. can be used. These dispersants may be used alone or in combination of two or more.

The amount of the dispersant to be used is determined depending on the content of the pigments and extender pigments used. The amount of the dispersant to be used may be 1.5 to 5% based on the total amount of pigments used and the extender pigments. When the total amount of the extender pigment is less than 0.1%, the dispersing effect is poor. When the total amount of the extender pigment is 5% or more, the present invention may be painted, resulting in discoloration at a high temperature of the coating film. Suitably, it is 0.1 to 1.5% by weight of the combined amount of pigments and extender pigments.

The extender pigments used in the present invention include fibrous materials such as titanic acid whiskers and ceramic pigments, extender pigments such as alumina, barium sulfide, and boron nitride , Molybdenum disulfide, acid treated CNT POWDER, and graphite. In the present invention, functional pigments such as boron nitride and molybdenum disulfide have been used. These functional pigments have a very high heat radiation effect under high temperature and have a very low frictional resistance, thereby shortening the cooking time of food during cooking.

As extender pigments for use in the present invention, extender pigments having spherical particles such as alumina and barium sulfate can be used. The extender pigments can be used in an amount of 5 to 30% by weight based on the weight% of the resin vehicle manufactured. The amount of extender pigments is not limited and can be varied depending on the color and gloss of the paint. If the amount of the extender pigment is less than 5% by weight, the workability and hardness of the paint may be lowered. If the amount exceeds 30% The sedimentation of the paint is severely caused and the hard cake phenomenon may occur when left for a long time. Usually, the amount of the extender pigment is suitably 20 to 30% by weight with respect to the resin vehicle.

In order to improve the completeness of the object of the present invention, a short fiber such as a whisker and a fibrous material are mixed and used. This is because a thermal shock occurs during continuous cooking after coating a ceramic coating material on metals and nonferrous metals, As a result, fibrous materials were used as means for preventing such cracks.

Such fibrous materials may be one or a mixture of two or more kinds of fibrous materials such as titanic acid whiskers and ceramic fiber short fibers. Such fibrous materials may be used in an amount of 0.1 to 15% by weight based on 100% by weight of PTA. If it is 0.1% by weight or less, cracks may occur in the dry film depending on the color. If it exceeds 15% by weight, the appearance of the dry film may become rough.

In the present invention, these functional pigments may be used either singly or in combination of two kinds depending on the color. The amount of the functional pigment to be used may be 2 to 10% by weight based on 100% by weight of the paint PTA. If the amount of the functional pigment is less than 2% by weight, the effect of the functional pigment can not be obtained. In addition, since it is possible to exhibit adhesion property and gloss deterioration of the paint, 2 to 5% by weight is suitable.

In order to manifest various colors, organic and inorganic pigments can be used in common. The amount of the pigment to be used is not determined, and the amount to be used can be arbitrarily determined depending on the color to be expressed. The inorganic resin, additive, extender pigment, functional pigment and pigment were uniformly mixed and dispersed so that the mean particle size was less than 10 microns by using a dispersing machine such as RING MILL, and a PTA vehicle could be made.

The non-tacky silicone silane conversion product (semi-finished product 1) was produced in order to enhance the perfection of the present invention, which is a semi-permanent non-tacky ceramic paint. Since the lifespan is very short and the unreacted silicone oil migrates during cooking, there is a problem to be solved by the present invention. The production process of the non-tacky silicone powder silane modified product (semi-finished product 1) will be described in more detail as follows.

<Non-adhesive silicone powder silane modified product (semi-finished product 1) synthesis step>

 1 to 20% by weight of silicone powder, 10 to 20% by weight of BYK 348 as a dispersing agent, 0.1 to 5% by weight of iso-propyl alcohol, butyl cellosolve, and flow-filtered cellosolve as a solvent, 20 to 40% by weight of a mixed solvent and 1 to 3% by weight of a polyether-modified siloxane series are uniformly dispersed while maintaining the temperature at 60 to 90 ° C for 2 hours at 300 to 400 rpm can do. This is a synthetic process in which the OH group of the silicon powder of silicon powder enables the semi-permanent non-sticking performance due to the chemical bonding of the siloxane between the first solution. This process is shown in Fig. This process, which is the main feature of the present patent to enable secondary chemical bonding between the non-tacky silicone powder silane modification (intermediate 1), which is the final coating composition, and the inorganic binder, alkoxysilane (curing agent), is shown in FIG.

Next, a process for preparing a non-adhesive ptfe silane modified product (semi-finished product 2) (solution 4) is described as follows to complete the present invention.

<Non-Adhesive PTFE Silane Modified (Semifinished Product 2) Synthetic Step>

20 to 40% by weight of the prepared inorganic ceramic binder (first solution) is allowed to react with the organofunctional silane compound represented by the following formula.

RnSi (Y) 4-n - (1)

Wherein R is an alkyl group having 3 or less carbon atoms, Y is an alkoxy group having 4 or less carbon atoms, and n is an integer of 1 to 3. The organofunctional silane compound may be, for example, trimethoxysilane, methyltriethoxysilane, tetraalkoxysilane, tetraethylorthosilicate, methyltrimethoxysilane or ethyltrimethoxysilane, alone or in admixture of two or more 20 to 40% by weight of the solution is slowly added dropwise. At this time, when the reaction temperature reaches 40 to 50 ° C, 0.01 to 3% by weight of an anionic surfactant such as an anionic surfactant is added, and PFOA-removed PTFE powder or PTFE emulsion is added in an amount of 21 to 30 wt% % And the mixture is stirred for 3 hours to complete the non-sticky PTFE semi-finished product 2.

In this process, a surfactant and a PTFE emulsion are added to the inorganic silica sol and the alkoxysilane partial hydrolyzate (solution 1) to form micelles, and PTFE is bonded to the outside of the PTFE by networking with partially hydrolyzed alkoxysilane Lt; RTI ID = 0.0 &gt; PTFE &lt; / RTI &gt; This gives the non-tacky PTFE silane variant the ability to prevent non-tacky MIGRATION by secondary networking of inorganic binder and alkoxysilane curing agent.

This process is illustrated in FIG. 6 and the chemical formula by the secondary chemical bond between the inorganic binder, the alkoxysilane and the non-tacky PTFE silane variant, which is the final coating, is shown in FIG.

&Lt; Production process of the fifth solution &

In order to complete the semi-permanent non-tacky ceramic coating composition in the present invention, the non-tacky PTFE silane modified product (semi-finished product 2) is added to the previously prepared non-tacky silicone silane modified product (semi-finished product 1) to prepare the fifth solution.

The fifth solution is prepared by slowly adding 5 to 20% by weight of the non-tacky PTFE silane modified product (semi-finished product 2) to the semi-finished product 1 while warming the produced non-tacky silicone powder silane modified product (semi-finished product 1).

Hereinafter, a process for producing a paint using component elements manufactured by the various processes described above will be described.

In order to complete the semi-permanent non-tacky ceramic coating composition according to the present invention, the following composition is used to prepare the base paint of the present invention by using the above-prepared solutions 1 to 5.

The base paint comprises 60 to 90% by weight of the second solution and 10 to 40% by weight of the fifth solution. Also, the transparent topcoat (top coat) coating comprises from 60 to 90% by weight of the first solution, from 40 to 10% by weight of the fifth solution and from 0.5 to 10% by weight of the pearl pigment.

In order to complete the present invention, the curing agent (the seventh solution), which is a binder, is included. The curing agent (the seventh solution) is a solution of an alkoxysilane such as methyltrimethoxysilane, methyltriethoxysilane or tetramethylethoxysilane And then adding the organic acid catalyst to the metal alkoxide in an amount of 1 to 3% by weight to prepare a curing agent.

In order to complete the invention of the present invention, 25 to 100% by weight of the curing agent may be mixed with the base paint to prepare the base product by polymerizing at 100 to 200 RPM for 4 to 12 hours, have.

Table 1 below illustrates the composition of the coating material according to the present invention and the composition thereof.

division Inorganic ceramic binder
(Solution 1) mill base
solution
(Solution 2) Non-tacky silicone
Modified powder silane (semi-finished product 1) Non-adherent ptfe silane variant (semi-finished product 2) Solution 5 Base
varnish Transparency
normal course Colloidal silica 50 - 60 20 - 42 2.5 - 12 15 - 36 40 - 57 16 ?? 60.6 34 - 77 34 - 77 Colloidal metal sol 0 - 5 0 - 3.5 0 - 1 0 - 3 0 ?? 4.5 0 ?? 4.9 0 ?? 6.5 0 ?? 6.5 Organic acid 0.5 - 2 0.2 - 1.4 0.02 ?? 0.4 0.1 ?? 1.2 0.4 ?? 1.9 0.2 ?? 2.2 0.4 ?? 2.7 0.4 ?? 2.7 Isopropanol 1- 10 0.4 - 7 0 - 2 0.3 - 6 8.5 ?? 9.5 1.0 ?? 10.1 One ?? 12.8 One ?? 12.8 water 5 - 20 2 - 14 0.2 - 4 1 - 12 4 - 19 1.6 ?? 20.2 3 - 18 3 - 18 (Sieving) pigment 5 - 30 3 - 27 Heat transfer additive 5 - 25 3 ?? 22.5 additive 0.1 - 3 0.1 - 27 solvent 1 - 10 5 - 20 0.6 - 9 Cellosolve
solvent 20 - 60 silicon
powder 0.2 0.5 1.5 Dispersant Alkoxysilane 20 - 40 1 - 5 0.1 ?? 3.5 0.1-2 0.1-2 Anionic surfactant 0 - 2 0 ?? 0.4 0 ?? 0.2 PTFE 10 - 40 0.5 - 8 0 ?? 3.5 0.5 PEARL PIGMENT 0.5 - 10

* Aging and painting conditions by temperature

1) Base paint manufacturing process

The PTA base solution and the curing agent (7 solution) prepared in the present invention were aged at 100 to 200 RPM for 4 hours

2) Coating process for TOP COAT

The solution of the sixth solution and the prepared curing agent (7 solution) were aged at 100 to 200 rpm for 4 to 12 hours

3) The above-mentioned basecoat aged material and TOP COAT aged material were subjected to a wet-on-wet process,

   Kitchen containers painted with system

4) Bake conditions at 220 ~ 250 ℃ for 30 ~ 50 minutes and cool down.

The paint of the present invention may have the same composition as the embodiment of Table 2 as follows.

number division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 One Colloidal silica (acidic, 30%) Inorganic ceramic binder 20 25 2 Colloidal silica (basic, 40%) 15 30 25 30 3 Colloidal zirconia 5 2 5 4 Colloidal titania 3 3 3 One 5 Methyltrimethoxysilane 2 2 5 5 6 Organic acid 0.1 0.5 0.3 One 0.5 2 7 Alkoxysilane 0.5 One 1.5 3 5 8 Isopropanol 15 12 4.7 12 10 26 9 Butyl cellosolve 5 10 5 10 20 10 Extender pigment 20 16 10 10 11 Molybdenum disulfide 5 12 Graphite 5 13 Boron nitride 5 3 5 5 14 Alumina 7 7 7 7 7 15 Mica 10 6 10 6 6 16 Pigment 10 10 10 2 17 Pearl pigment 5 18 Non-tacky silicone powder silane variant
(Semi-finished product 1) 1.9 5 2 5 3 2 19 Non-tacky PTFE silane variant
(Semi-finished product 2) 4 15 10 14.7 7.5 3 20 Surfactants 1.5 1.5 One 0.8 One One Sum 100 100 100 100 100 100 21 Alkoxysilane (curing agent) 30 40 50 45 35 40 result Pencil hardness 9H 7H 8H 8H 8H 8H Attachment 5B 4B 5B 5B 5B 5B Thermal transfer (temperature change comparison) usually Great Great Great Great Poor Non-sticky Great very best Great Great Great Great

* Hardener (Solution 7) is aged and hardened with alkoxysilane methyltrimethoxysilane, tetramethoxysilane or mixture.

(Examples 1 to 6, weight ratio 100: curing agent 30 to 60)

The coating material of the present invention is applied to the surface of a kitchen container or the like by a process of, for example, spraying, spin coating, silk screen or the like in a wet on wet process, followed by curing at 220 to 250 ° C for 30 to 50 minutes after 2COAT to form a film .

The difference from the previously disclosed processes of this patent is that it is possible to maintain semi-permanent physical properties and functions of non-tacky properties by chemical bonding of the non-tacky silicone powder silane modification, a secondary siloxane network between the PTFE silane modification and the inorganic binder, 8.

Claims (6)

30 to 68% by weight of an inorganic ceramic binder;
3 to 30% by weight of thermally conductive functional additives and pigments;
1.9 to 5% by weight of a non-tacky silicone powder silane modified by chemical bonding by reacting a non-tacky silicone powder with a silane;
Wherein the secondary chemical bond between the non-tacky silicone powder silane modification and the inorganic ceramic binder is provided. 30 to 68% by weight of an inorganic ceramic binder;
3 to 30% by weight of thermally conductive functional additives and pigments;
3 to 15% by weight of a non-tacky PTFE silane modification reacted with a non-tacky PTFE emulsion and a silane;
Wherein the second chemical bond between the non-tacky PTFE silane modification and the inorganic ceramic binder is provided.
The method according to any one of claims 1 to 3,
The thermally conductive functional additive may be used alone or in combination of two or more among boron nitride, carbon nanotube, graphite, and molybdenum disulfide;
Wherein the pigment is characterized by an extender pigment and an inorganic pigment. The method of claim 3,
The particle size of the boron nitride and the graphite is 10 mu m or less;
Wherein the boron nitride is hexaboric boron nitride (HBN), and the particle size of the molybdenum disulfide is 65 mu m or less. The method according to claim 1,
Wherein the silicone powder has a particle size of 0.1 to 5 占 퐉. The method according to any one of claims 1 to 3, further comprising alkoxysilane as a curing agent;
Wherein the alkoxysilane curing agent comprises at least one of methyltrimethoxysilane, tetramethoxysilane, methyltriethoxysilane, and phenyltrimethoxysilane;
Wherein the alkoxysilane curing agent is blended in an amount of 30 to 60% by weight based on the weight of the coating material.

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