KR101864757B1 - Insulation coating composition for plating rack and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an insulating coating composition for a plating rack and a method for producing the same, and is a plastisol comprising a polyvinyl chloride resin and a plasticizer; And inorganic nanoparticles dispersed in the plastisol and surface-modified by a coupling agent comprising a hydroxyl group and an amine group, wherein the polyvinyl chloride resin and the inorganic nanoparticles are bonded by the coupling agent, An insulating coating composition for a rack is provided.

Description

Technical Field [0001] The present invention relates to an insulating coating composition for plating racks and a manufacturing method thereof,

The present invention relates to an insulating coating composition for a plating rack and a method of manufacturing the same.

Generally, the plating rack comprises a metal or alloy base material and an insulating coating layer formed on the surface of the metal or alloy base material. The base material is made of a metal or an alloy material in order to transmit power from the rectifier to the plated object caught in the plating rack. The formation of the insulating coating layer on the surface of the metal or alloy base material is unnecessary to prevent the power source from spreading to the outside. Therefore, the insulating coating layer is not formed on the surface of the metal or alloy base material where the plated body directly contacts.

The base material is generally made of a copper material having excellent electrical conductivity. The insulating coating layer is generally made of polyvinyl chloride (PVC). Polyvinyl chloride has advantages such as light weight, chemical resistance, corrosion resistance, heat insulation and electrical insulation, but has a disadvantage in that tensile strength and impact strength are weak. For example, when electroplating is performed using a plating rack including a PVC coating layer, the PVC coating layer sometimes breaks or breaks during plating. In recent years, a method of adding a calcium carbonate (CaCO ₃ ) filler to a PVC resin is used to improve the strength of the PVC coating layer.

On the other hand, when electroplating is performed using the plating rack, the chemical may remain on the surface of the plating rack. This is because the water repellency of the PVC coating layer is not good. If the plating rack is immersed in the plating solution while the chemical remains on the surface of the plating rack, the plating bath for containing the plating solution may be contaminated.

Japanese Patent Application No. 10-1426494 discloses a jig body made of a metal and a polymer coating layer formed on a surface of the jig body in a jig assembly for electroplating. However, Patent Document 1 does not disclose a method for improving the strength or water repellency of the polymer coating layer.

Registration No. 10-1426494 (registered on Apr. 29, 2014)

Disclosure of the Invention In order to solve the above problems, an object of the present invention is to provide an insulating coating layer having excellent strength by dispersing inorganic nanoparticles in a plastisol, wherein inorganic nanoparticles surface-modified with a coupling agent are dispersed in the plastisol will be. More specifically, it is an object of the present invention to provide a method for producing an inorganic nanoparticle, wherein the coupling agent increases the dispersibility of the inorganic nano-particles in the plastisol and the bonding strength between the inorganic nanoparticles and the PVC resin, .

Another object of the present invention is to prepare an insulating coating layer having excellent water repellency by adding a water repellent compound to the plastisol.

However, the problems to be solved by the present invention are not limited to the above-described problems, and other problems that are not described can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention is constructed as follows.

A plastisol comprising a polyvinyl chloride resin and a plasticizer; And inorganic nanoparticles dispersed in the plastisol and surface-modified by a coupling agent comprising a hydroxyl group and an amine group, wherein the polyvinyl chloride resin and the inorganic nanoparticles are bonded by the coupling agent, An insulating coating composition for a rack is provided.

The content of the plasticizer relative to the weight of the polyvinyl chloride resin may be 45 to 65 PHR, and the content of the inorganic nanoparticles may be 5 to 25 PHR.

The coupling agent may combine with the polyvinyl chloride resin to produce an amine bond and hydrochloric acid.

The coupling agent may include a silane coupling agent.

The silane coupling agent may be selected from the group consisting of aminopropyltrimethoxysilane, aminopropyltriethoxysilane, 3-triethoxysilyl-N- (1,3-dimethyl-butylidene) Aminopropyltrimethoxysilane, N-2 (aminoethyl) -3-aminopropyltriethoxysilane, N-2 (aminoethyl) Aminopropyltrimethoxysilane, and aminopropyltrimethoxysilane.

The inorganic nanoparticles may include a metal oxide.

The metal oxide is silicon dioxide (SiO _2), aluminum oxide (Al ₂ O _3), zirconium oxide (ZrO _2), titanium dioxide (TiO _2), tungsten (WO _3), barium (BaO), calcium oxide oxidation ( CaO), may include at least one selected from the group consisting of magnesium oxide (MgO), lithium (Li ₂ O oxide), sodium oxide (Na ₂ O) and potassium oxide (K ₂ O).

The plastisol may further include at least one selected from the group consisting of a filler, a stabilizer, a thickener, and a defoaming agent.

Preparing a plastisol comprising a polyvinyl chloride resin and a plasticizer; Modifying the surface of the inorganic nanoparticles with a coupling agent comprising a hydroxyl group and an amine group; And introducing the surface-modified inorganic nanoparticles into the prepared plastisol to disperse the surface-modified inorganic nanoparticles in the plastisol, wherein the inorganic nanoparticles and the polyvinyl chloride resin Is coupled by the coupling agent. ≪ IMAGE >

The step of preparing the plastisol comprises: dissolving a polyvinyl chloride resin in a plasticizer; And adding at least one selected from the group consisting of a filler, a stabilizer, a thickener, and a defoaming agent to the plasticizer in which the polyvinyl chloride resin is dissolved.

The step of modifying the surface of the inorganic nanoparticles comprises: mixing a coupling agent into a volatile solvent; Introducing inorganic nanoparticles into the volatile solvent to which the coupling agent is mixed to bind the coupling agent to the inorganic nanoparticles so that the surface of the inorganic nanoparticles is modified; And removing the coupling agent not bound to the inorganic nanoparticles and the volatile solvent.

In the step of preparing the plastisol, the content of the plasticizer is 45 to 65 PHR based on the weight of the polyvinyl chloride resin. In the step of injecting the inorganic nanoparticles, the content of the inorganic nano- 5 to 25 PHR by weight.

According to the present invention having the above-described constitution, the PVC resin and the inorganic nanoparticles are combined by the coupling agent, and the dispersibility of the inorganic nanoparticles in the plastisol and the bonding strength between the inorganic nanoparticles and the PVC resin are enhanced. Therefore, an insulating coating layer excellent in tensile strength and impact strength can be produced.

Further, according to the present invention, a water-repellent compound can be added to the plastisol to bond with the coupling agent. An insulation coating layer having excellent water repellency, in which the -CF ₃ group of the water-repellent compound is distributed on the surface, can be produced.

Further, according to the present invention, an insulating coating composition of a plating rack can be used for the production of an insulating coating layer of a metal or alloy base material as well as an insulating coating layer of a plating rack. The general insulating coating layer has excellent tensile strength, impact strength, and water repellency.

1 (a) is an image of an insulating coating composition of a plating rack manufactured according to the production example of the present invention.
Fig. 1 (b) is an image showing an insulating coating layer formed by applying the insulating coating composition of the plating rack of Fig. 1 (a) to the surface of a copper base material.
2 (a) is an SEM image of the insulating coating layer of Fig. 1 (b).
FIG. 2 (b) is a view showing the EDX analysis result of the insulating coating layer of FIG. 1 (b).

In the following, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Throughout the specification, when a part is referred to as being "connected" (connected, connected, coupled) with another part, it is not only the case where it is "directly connected" "Is included. Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having ", and the like, means that there is a feature, a number, a step, an operation, an element, a component, Does not imply that the presence of a feature, a number, a step, an operation, an element, a component, or a combination thereof is excluded.

The insulating coating composition of the plating rack according to an embodiment of the present invention comprises a plastisol and a surface modified inorganic nanoparticle dispersed in the plastisol.

The plastisol comprises a polyvinyl chloride resin and a plasticizer. The plasticizer may include at least one selected from the group consisting of dioctyl phthalate (DOP), dioctyl adipate (DOA), and tricalcium phosphate (TCP), but the present invention is not limited thereto.

The surface-modified inorganic nanoparticles include a substance formed by combining the inorganic nanoparticles with a coupling agent. Specifically, the coupling agent binds to the surface of the inorganic nanoparticles to modify the surface of the inorganic nanoparticles. Thus, in the present specification, the 'surface modified inorganic nanoparticle' means the inorganic nanoparticle and the substance including the coupling agent bonded to the surface of the inorganic nanoparticle.

The polyvinyl chloride resin and the inorganic nanoparticles are bonded by the coupling agent. Therefore, the coupling agent not only modifies the surface of the inorganic nanoparticles but also binds the inorganic nanoparticles with the polyvinyl chloride resin. This is because the coupling agent contains a hydroxyl group at one end and an amine group at the other end. On the other hand, hydroxyl groups are also formed on the surface of the inorganic nanoparticles. For convenience of explanation, hereinafter, the hydroxyl group at one end of the coupling agent is referred to as a coupling hydroxyl group, and the hydroxyl group on the surface of the inorganic nanoparticle is referred to as an inorganic hydroxyl group. The inorganic nanoparticles are bound to one end of the coupling agent by dehydration condensation reaction of the coupling hydroxyl group and the inorganic hydroxyl group. On the other hand, the polyvinyl chloride resin is bonded to the other end of the coupling agent to form an amine bond and hydrochloric acid.

The coupling agent combined with the inorganic nanoparticles also binds to the polyvinyl chloride resin, thereby enhancing the dispersibility of the inorganic nanoparticles in the plastisol. Thus, a large amount of inorganic nanoparticles can be added to the plastisol. This in turn increases the tensile strength of the insulating coating layer, which is cured after the insulating coating composition of the plating rack is applied to the base material.

Further, the coupling agent binds the inorganic nanoparticles and the polyvinyl chloride resin to improve the binding force between the inorganic nanoparticles and the polyvinyl chloride resin. Which ultimately increases the impact strength of the insulating coating layer.

Preferably, the coupling agent comprises a silane coupling agent. This is because many of the silane coupling agents include the coupling hydroxyl group and the amine group. More preferably, the coupling agent is selected from the group consisting of aminopropyltrimethoxysilane, aminopropyltriethoxysilane, 3-triethoxysilyl-N- (1,3-dimethyl-butylidene) propylamine (Aminoethyl) -3-aminopropyltrimethoxysilane, N-2 (aminoethyl) -3-aminopropyltriethoxysilane, N-2 Silane, and N-phenyl-3-aminopropyltrimethoxysilane. This is because a coupling agent capable of enhancing the dispersibility of the inorganic nanoparticles and the binding force between the inorganic nanoparticles and the polyvinyl chloride resin is considered. Even more preferably, the coupling agent comprises relatively easily obtainable N-2 (aminoethyl) -3-aminopropyltrimethoxysilane.

The silane coupling agent may have a structure represented by the following formula (1).

[Chemical Formula 1]

In formula (1), R ₁ , R ₂ and R ₃ independently represent an alkoxy group (-OR). The alkoxy group (-OR) bonded to Si is hydrolyzed by moisture in the atmosphere to become the coupling hydroxyl group (-OH). Accordingly, the silane coupling agent includes the coupling hydroxyl group at one end and the amine group at the other end.

The inorganic nanoparticles react with moisture in the atmosphere to form an inorganic hydroxyl group (-OH) on the surface. The coupling agent includes the coupling hydroxyl group at one end, and the inorganic nanoparticles include the inorganic hydroxyl group on the surface thereof, so that the coupling agent and the inorganic nanoparticles bind by the dehydration condensation reaction. As a result, the coupling agent and the inorganic nanoparticles are connected via oxygen (-O-). In other words, the surface of the inorganic nanoparticles is modified.

The inorganic nanoparticles and the coupling agent may be combined before the inorganic hydroxyl group (-OH) is formed on the surface of the inorganic nanoparticles. Preferably, the inorganic nanoparticles include metal oxides. More preferably, the inorganic nano-particles of silicon dioxide, which are easily metal which is available oxide (SiO _2), aluminum oxide (Al ₂ O _3), zirconium oxide (ZrO _2), titanium oxide (TiO _2), tungsten oxide ( WO _3), the group consisting of oxide, barium (BaO), calcium oxide (CaO), magnesium oxide (MgO), lithium oxide (Li ₂ O), sodium oxide (Na ₂ O), and potassium oxide (K ₂ O) ≪ / RTI > The inorganic nanoparticles containing the metal oxide may be talc (Mg ₃ Si ₄ O ₁₀ (OH) ₂ ), which will be described later in the Production Examples.

On the other hand, the coupling agent can be generally combined with the polyvinyl chloride resin as shown in the following reaction formula (1).

[Reaction Scheme 1]

In Scheme 1, R ₁ , R ₂ , and R ₃ are independently an alkoxy group (-OR). According to Reaction Scheme 1, a silane coupling agent and a polyvinyl chloride resin are bound in the form of a salt (H ₂ N ⁺ Cl ^- ), and finally an amine bond and hydrochloric acid (HCl) are produced.

Although the reaction formula 1 shows only the coupling between the coupling agent and the polyvinyl chloride resin, according to one embodiment of the present invention, before coupling the coupling agent to the polyvinyl chloride resin, The inorganic nanoparticles are bonded to one end of a silane coupling agent having an amine group by a dehydration condensation reaction. Those skilled in the art will appreciate that the inorganic nanoparticles below the amine bond, one of the end products of Scheme 1, are bonded via oxygen (-O) instead of R ₁ , R ₂ , or R ₃ to the plating rack Lt; RTI ID = 0.0 > of the < / RTI >

Preferably, the content of the plasticizer is 45 to 65 PHR by weight of the polyvinyl chloride resin. If the content of the plasticizer is less than 45 PHR by weight of the polyvinyl chloride resin, the polyvinyl chloride resin is not completely dissolved in the plasticizer. If the content of the plasticizer exceeds 65 PHR by weight relative to the weight of the polyvinyl chloride resin, the amount of the polyvinyl chloride resin becomes relatively small. In this case, since the insulating coating layer of the plating rack is coated on the base material and cured, the insulating coating layer can not sufficiently retain lightweight, chemical resistance, corrosion resistance, heat insulation, electrical insulation, etc., which are advantages of polyvinyl chloride do. More preferably, the content of the plasticizer is 50 to 60 PHR based on the weight of the polyvinyl chloride resin, considering that the advantage of the polyvinyl chloride is expressed.

Preferably, the content of the inorganic nanoparticles is 5 to 25 PHR, based on the weight of the polyvinyl chloride resin, when the plasticizer content is 45 to 65 PHR. If the content of the inorganic nanoparticles is less than 5 PHR by weight of the polyvinyl chloride resin, the number of the inorganic nanoparticles in the plastisol is small, so that the tensile strength or impact strength of the insulating coating layer to be manufactured thereafter is inferior. If the content of the inorganic nanoparticles exceeds 25 PHR by weight of the polyvinyl chloride resin, inorganic nanoparticles not bound to the polyvinyl chloride resin are contained in the plastisol. As a result, the dispersibility of the inorganic nanoparticles in the plastisol or the bonding strength between the inorganic nanoparticles and the polyvinyl chloride resin is deteriorated. More preferably, the content of the inorganic nanoparticles is 10 to 20 PHR, considering the dispersibility of the inorganic nanoparticles and the binding force between the inorganic nanoparticles and the polyvinyl chloride resin.

On the other hand, since the 'surface modified inorganic nanoparticles' are dispersed in the plastisol as described above, all the coupling agents in the plastisol are bound to all the inorganic nanoparticles. Therefore, the content of the coupling agent is not so important as long as the content of the inorganic nanoparticles is determined.

The plastisol may further include additives other than the plasticizer. Specifically, the plastisol may further include at least one selected from the group consisting of a filler, a stabilizer, a thickener, and a defoaming agent. In particular, the stabilizer is added to stabilize chlorine (Cl) having high reactivity contained in the polyvinyl chloride resin. Since these additives are already known, a description thereof is omitted.

The surface-modified inorganic nano-particles may further include a water-repellent compound. In this case, not only the inorganic nanoparticles but also the water repellent compound are bonded to one end of the coupling agent. The water-repellent compound includes a water-repellent hydroxyl group (-OH) at one end and a -CF ₃ group at the other end. The water-repellent hydroxyl group (-OH) and the coupling hydroxyl group (-OH) bond by a dehydration condensation reaction. As a result, the coupling agent and the water-repellent compound are connected via oxygen (-O-). Whereby the water-repellent compound bound to the coupling agent is well dispersed in the plastisol.

Within the plastisol, all of the coupling agents are bound to all of the water repellent compounds. Also in the plastisol, all coupling agents are bound to all inorganic nanoparticles. Therefore, the content of the water repellent compound is not so important as long as the content of the inorganic nanoparticles is determined.

The -CF ₃ group at the other end of the water repellent compound improves the water repellency of the insulating coating layer. When the insulating coating composition of the plating rack including the water-repellent compound is coated on the base material and then cured, an insulating coating layer having a -CF ₃ group distributed on the surface thereof is produced. -CF ₃ groups are distributed on the surface of the insulating coating layer, and the insulating coating layer has excellent water repellency.

The water-repellent compound may be selected from the group consisting of Trichloro (1H, 1H, 2H, 2H-perfluorooctyl) silane, 1H, 1H, 2H-Perfluorooctyltriethoxysilane, At least one selected from the group consisting of trimethoxy (3,3,3-trifluoropropyl) silane, 1H, 1H, 2H, 2H-perfluorodecyltrimethoxysilane, heptadecafluoro-1,1,2,2-tetrahydrodecyl trimethoxysilane, heneicosafluorododecyltrichlorosilane, and heptadecafluorodecyltrichlorosilane However, the present invention is not limited thereto. Hereinafter, a method of manufacturing the insulating coating composition of the plating rack will be described. The contents overlapping with the above will be omitted.

The method for preparing an insulating coating composition for a plating rack according to an embodiment of the present invention includes a step of preparing a plastisol, a step of modifying the surface of an inorganic nanoparticle, and a step of injecting a surface-modified inorganic nanoparticle. The insulating coating composition is prepared at room temperature. Of the materials used for preparing the insulating coating composition, the polyvinyl chloride resin and the inorganic nanoparticles are solid at room temperature, and the plasticizer, coupling agent, water repellent compound, and volatile solvent are liquid at room temperature.

The step of preparing the plastisol is a step of producing the plastisol comprising the polyvinyl chloride resin and the plasticizer. In the production of the plastisol, the polyvinyl chloride resin is first dissolved in the plasticizer. The content of the plasticizer is from 45 to 65 PHR by weight of the polyvinyl chloride resin, as described above. Next, an additive other than the plasticizer is added to the plasticizer in which the polyvinyl chloride resin is dissolved. The additive other than the plasticizer is at least one selected from the group consisting of a filler, a stabilizer, a thickener, and a defoaming agent.

In the inorganic nanoparticle surface modification step, the surface of the inorganic nanoparticle is modified by the coupling agent.

Specifically, the coupling agent is first mixed with the volatile solvent. The volatile solvent includes at least one selected from the group consisting of ethanol, alcohol, ketone, and acetone, but the present invention is not limited thereto.

Next, the water repellent compound is mixed with the volatile solvent in which the coupling agent is mixed. The water-repellent compound binds to the coupling agent in the volatile solvent by a dehydration condensation reaction.

Next, the inorganic nanoparticles are added to the volatile solvent in which the coupling agent and the water-repellent compound are mixed. The inorganic nanoparticles bind to the coupling agent to which the water-repellent compound is bound by a dehydration condensation reaction. In other words, the surface of the inorganic nanoparticles is modified.

Next, a coupling agent not bonded to the inorganic nanoparticles, a water repellent compound (i.e., a water repellent compound not bound to the inorganic nanoparticles) not bonded to the coupling agent bound to the inorganic nanoparticles, do. Specifically, when the volatile solvent, the coupling agent, the water-repellent compound, and the inorganic nanoparticles are contained in the container, the liquid component in the container is removed. The volatile solvent may be naturally dried, and the coupling agent and the water repellent compound not bound to the inorganic nanoparticles may be injected into another container. Since the volatile solvent, a part of the coupling agent, and a part of the water repellent compound are removed in the process of manufacturing the insulating coating composition of the plating rack, the amount of these substances is not so important. However, the volatile solvent needs to have an amount sufficient to accommodate the inorganic nanoparticles, and the coupling agent needs to have an amount sufficient to modify the surface of the inorganic nanoparticles. Further, the water repellent compound needs to have an amount sufficient to bond the inorganic nanoparticles to the coupled coupling agent.

In the step of injecting the surface-modified inorganic nanoparticles, the surface-modified inorganic nanoparticles are injected into the prepared plastisol. The surface-modified inorganic nanoparticles are composed of the inorganic nanoparticles, a coupling agent bound to the inorganic nanoparticles, and a water repellent compound bonded to the coupling agent.

The surface modified inorganic nanoparticles are dispersed in the plastisol after being charged. In this process, the polyvinyl chloride resin is bonded to the other end of the coupling agent having the inorganic nanoparticles and the water-repellent compound bonded at one end thereof.

In the step of injecting the surface-modified inorganic nanoparticles, the content of the inorganic nanoparticles added is 5 to 25 PHR, which is described above, relative to the weight of the polyvinyl chloride resin. Even if the surface of inorganic nanoparticles having an amount exceeding 25 PHR is modified in the inorganic nanoparticle surface modification step, inorganic nanoparticles of 5 to 25 PHR are added to the prepared plastisol.

The insulating coating composition of the manufactured plating rack has a structure in which inorganic nanoparticles, a water repellent compound, and a polyvinyl chloride resin are all bonded through a coupling agent. Therefore, the insulating coating composition of the prepared plating rack has excellent tensile strength, impact strength, and water repellency. Hereinafter, production examples, comparative examples, and experimental examples will be described.

[Manufacturing Example]

DOP was prepared as a plasticizer. N-2 (aminoethyl) -3-aminopropyltrimethoxysilane was prepared as a coupling agent. Ethanol was prepared as a volatile solvent. Then, talc (Mg ₃ Si ₄ O ₁₀ (OH) ₂ ) powder was prepared as an inorganic nanoparticle.

After the polyvinyl chloride resin was charged into the first container, the plasticizer was injected. 100 g of the polyvinyl chloride resin was dissolved in 55 g of the plasticizer. A stabilizer, a thickener, and an antifoaming agent were added to the polyvinyl chloride resin in which the plasticizer was dissolved. Thus, the plastisol was prepared in the first container.

Next, the coupling agent and the volatile solvent were injected into the second vessel. The coupling agent was mixed with 0.5 L of the volatile solvent so as to be 1M. Then, 15 g of the inorganic nanoparticles were added to the volatile solvent mixed with the coupling agent. The materials in the second container were sufficiently agitated such that the surface of the inorganic nanoparticles was modified. Thereafter, the volatile solvent was naturally dried, and the coupling agent not bound to the inorganic nanoparticles was injected into the third container. Thus, inorganic nanoparticles surface-modified in the second container were prepared.

Next, the surface-modified inorganic nanoparticles in the second container were put into the plastisol in the first container. The materials in the first container were sufficiently agitated so that the coupling agent and the polyvinyl chloride resin were combined. Whereby an insulating coating composition of the plating rack was prepared in the first container. Fig. 1 (a) shows an insulating coating composition of the above-prepared plating rack.

The insulating coating composition of the prepared plating rack was applied to the surface of the copper base material and then hardened to prepare an insulating coating layer. 1 (b) shows the insulating coating layer formed on the surface of the copper base material.

SEM and EDX analyzes were performed on the prepared surface of the insulating coating layer. FIG. 2 (a) shows an SEM image of the insulation coating layer, and FIG. 2 (b) shows the EDX analysis result of the insulation coating layer.

[Comparative Example]

An insulating coating composition of another plating rack was prepared in the same manner as in Production Example, except that inorganic nanoparticles and coupling agent were not used and instead calcium carbonate (CaCO ₃ ) filler powder was used. Specifically, 15 g of the filler powder was charged into the same plastisol as the plastisol of Production Example instead of the inorganic nanoparticles to prepare another coating composition for a plating rack.

[Experimental Example 1 - Measurement of tensile strength]

Each of the cured insulating coating composition specimens was taken from the insulating coating composition of the plating rack of the production example and the insulating coating composition of the plating rack of the comparative example. For both insulating coating composition specimens, tensile strength measurements were performed. The tensile strengths of the two insulating coating composition specimens were measured with a universal testing machine (UTM).

The tensile strength of the insulating coating composition specimen of the preparation example was 30 MPa, and the tensile strength of the insulating coating composition specimen of the comparative example was 20 MPa. Therefore, it was confirmed that an insulating coating layer having a higher tensile strength was formed when the inorganic nanoparticles surface-modified were introduced into the plastisol than when the filler powder was added.

[Experimental Example 2 - Measurement of Impact Strength]

Each of the cured insulating coating composition specimens was taken from the insulating coating composition of the plating rack of the production example and the insulating coating composition of the plating rack of the comparative example. For both insulating coating composition specimens, a Charpy impact test was performed.

The impact energy of the insulating coating composition specimen of the production example was 16 kgf · cm / cm ^2, and the impact energy of the insulating coating composition specimen of the comparative example was 7 kgf · cm / cm ² . Therefore, it has been confirmed that when the inorganic nanoparticles modified with the surface are introduced into the plastisol, the insulating coating layer having better impact strength is formed than when the filler powder is injected into the plastisol.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the present invention . Therefore, the true scope of the present invention should be defined by the appended claims.

Claims (13)

A plastisol comprising a polyvinyl chloride resin and a plasticizer; And
Inorganic nanoparticles dispersed in the plastisol and surface-modified with a coupling agent comprising a hydroxyl group and an amine group,
Wherein the polyvinyl chloride resin and the inorganic nanoparticles are bonded by the coupling agent,
Wherein the content of the plasticizer is 45 to 65 PHR, and the content of the inorganic nanoparticles is 5 to 25 PHR, based on the weight of the polyvinyl chloride resin.
delete The method according to claim 1,
Wherein the coupling agent is combined with the polyvinyl chloride resin to form an amine bond and hydrochloric acid.
The method according to claim 1,
Wherein the coupling agent comprises a silane coupling agent.
5. The method of claim 4,
The silane coupling agent may be selected from the group consisting of aminopropyltrimethoxysilane, aminopropyltriethoxysilane, 3-triethoxysilyl-N- (1,3-dimethyl-butylidene) Aminopropyltrimethoxysilane, N-2 (aminoethyl) -3-aminopropyltriethoxysilane, N-2 (aminoethyl) And aminopropyltrimethoxysilane. 2. The coating composition of claim 1,
The method according to claim 1,
Wherein the inorganic nanoparticles comprise a metal oxide.
The method according to claim 6,
The metal oxide is silicon dioxide (SiO _2), aluminum oxide (Al ₂ O _3), zirconium oxide (ZrO _2), titanium dioxide (TiO _2), tungsten (WO _3), barium (BaO), calcium oxide oxidation ( rack for the comprises CaO), magnesium oxide (MgO), at least one selected from the group consisting of lithium (Li ₂ O oxidation), the sodium oxide (Na ₂ O) and potassium oxide (K ₂ O) plating / RTI >
The method according to claim 1,
Wherein the plastisol further comprises at least one selected from the group consisting of fillers, stabilizers, thickeners, and antifoaming agents.
Preparing a plastisol comprising a polyvinyl chloride resin and a plasticizer;
Modifying the surface of the inorganic nanoparticles with a coupling agent comprising a hydroxyl group and an amine group; And
Introducing the surface-modified inorganic nanoparticles into the prepared plastisol to disperse the surface-modified inorganic nanoparticles in the plastisol,
Wherein the inorganic nanoparticles and the polyvinyl chloride resin are bonded by the coupling agent,
In the step of preparing the plastisol, the content of the plasticizer is 45 to 65 PHR based on the weight of the polyvinyl chloride resin,
Wherein the content of the inorganic nanoparticles in the step of injecting the surface-modified inorganic nanoparticles is 5 to 25 PHR based on the weight of the polyvinyl chloride resin.
10. The method of claim 9,
The step of preparing the plastisol
Dissolving a polyvinyl chloride resin in a plasticizer; And
And adding at least one selected from the group consisting of a filler, a stabilizer, a thickener, and a defoaming agent to the plasticizer in which the polyvinyl chloride resin is dissolved.
10. The method of claim 9,
The step of modifying the surface of the inorganic nanoparticles
Mixing the coupling agent into a volatile solvent;
Introducing inorganic nanoparticles into the volatile solvent to which the coupling agent is mixed to bind the coupling agent to the inorganic nanoparticles so that the surface of the inorganic nanoparticles is modified; And
A coupling agent not bonded to the inorganic nanoparticles, and a step of removing the volatile solvent.
delete 10. The method of claim 9,
Wherein the coupling agent is combined with the polyvinyl chloride resin to form an amine bond and hydrochloric acid.

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