KR20230030965A - Release coating composition containing single wall carbon nanotubes and release film using thereof - Google Patents

Abstract

An antistatic release coating agent according to the present invention comprises: an organopolysiloxane dispersion which has a viscosity of 15,000 to 25,000 cP at 25℃, and includes terminal double bond; a hydrogen siloxane crosslinking agent which has a viscosity of 15 to 35 cP at 25℃; a siloxane-based adhesion promoter; and a single-walled carbon nanotube dispersion.

Description

Antistatic release coating agent containing single wall carbon nanotubes and antistatic release film formed therefrom {Release coating composition containing single wall carbon nanotubes and release film using its}

The present invention relates to a release coating agent having excellent antistatic performance including single-walled carbon nanotubes and an antistatic release film formed therefrom.

When manufacturing circuit materials or semiconductors, when an insulating film with dots or adhesive materials is used as a release film, there is a problem in that foreign matter is generated due to static electricity generated when the release film is peeled, resulting in poor insulation or poor adhesion. .

In this case, efforts have been made to reduce such defects by adding an antistatic layer to the release film on the symmetrical surface to which the point and adhesive material are attached.

This antistatic property is also very important in the display field. When an antireflection film or polarizing film attached to OLED or LCD is attached to a display panel, since these films are made of plastic materials, static electricity is generated during friction and peeling. It is easy, and such static electricity can cause foreign matter defects when attaching the film.

Therefore, in order to prevent such defects, various antistatic treatments are performed on the release film. For example, there is a method of coating a water-based conductive material on the opposite surface of the release coating to impart antistatic performance or treating a water-based antistatic polymer as a base layer before forming the release layer, but in both cases, the antistatic surface is the release layer. There is a problem in that the antistatic performance is deteriorated due to the distance between the coating and the production cost is increased due to the complexity of the production process that requires two or more coatings.

Republic of Korea Patent Publication No. 10-2012-0007815

An object of the present invention is to provide an antistatic release coating agent capable of producing an antistatic release film having significantly improved release force, antistatic properties and durability.

The antistatic release coating agent according to the present invention has a viscosity of 15,000 to 25,000 cP at 25° C. and comprises an organopolysiloxane dispersion containing terminal double bonds; a hydrogen siloxane crosslinking agent having a viscosity of 15 to 35 cP at 25 °C; Siloxane-based adhesion promoter; and a single-walled carbon nanotube dispersion.

In the antistatic release coating agent according to an embodiment of the present invention, the adhesion promoter may include a silane compound containing a terminal epoxy group as a first adhesion promoter; and

The second adhesion promoter may include a reaction product between the first adhesion promoter and a silicone compound including two or more vinyl groups at terminal ends.

In the antistatic release coating agent according to an embodiment of the present invention, the silicone compound including two or more vinyl groups at the terminal may satisfy Formula 1 below.

[Formula 1]

In the antistatic release coating agent according to an embodiment of the present invention, the first adhesion promoter: the second adhesion promoter may be mixed in a weight ratio of 1:1.8 to 5.

In the antistatic release coating agent according to an embodiment of the present invention, the antistatic release coating agent may further include a dimethylvinylated and triethylated silica dispersion.

In the antistatic release coating agent according to one embodiment of the present invention, the organopolysiloxane dispersion may contain 1 to 5% by weight of the active ingredient and the balance may include a solvent.

In the antistatic release coating agent according to an embodiment of the present invention, the single-walled carbon nanotubes may have an average length of 1 to 5 μm.

In the antistatic release coating agent according to an embodiment of the present invention, the dispersion of single-walled carbon nanotubes may include single-walled carbon nanotubes, an amine-based compound, hydrogenated rubber, and a solvent.

In the antistatic release coating agent according to an embodiment of the present invention, the single-walled carbon nanotube dispersion may have a viscosity of 10,000 cP or less at 25 °C.

In the antistatic release coating agent according to an embodiment of the present invention, the single-walled carbon nanotube dispersion may include 3 to 10% by weight of single-walled carbon nanotubes.

The present invention also provides an antistatic release film, and the antistatic release film according to the present invention may be cured by applying an antistatic release coating agent according to an embodiment of the present invention.

The antistatic release coating agent according to the present invention has a viscosity of 15,000 to 25,000 cP at 25° C. and comprises an organopolysiloxane dispersion containing terminal double bonds; a hydrogen siloxane crosslinking agent having a viscosity of 15 to 35 cP at 25 °C; Siloxane-based adhesion promoter; and a single-walled carbon nanotube dispersion, which has remarkably excellent release force, antistatic properties, and durability.

1 shows the particle size distribution of single-walled carbon nanotubes used in an embodiment of the present invention.
Figure 2 shows the particle size distribution of multi-walled carbon nanotubes used in the comparative example of the present invention.

Advantages and characteristics of the embodiments of the present invention, and methods for achieving them will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

In describing the embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the embodiment of the present invention, which may vary according to the intention or custom of a user or operator. Therefore, the definition should be made based on the contents throughout this specification.

The antistatic release coating agent according to the present invention has a viscosity of 15,000 to 25,000 cP at 25° C. and comprises an organopolysiloxane dispersion containing terminal double bonds; a hydrogen siloxane crosslinking agent having a viscosity of 15 to 35 cP at 25 °C; Siloxane-based adhesion promoter; and a single-walled carbon nanotube dispersion. As a result, release force, antistatic properties, and durability are remarkably improved.

The antistatic release coating agent according to the present invention includes a siloxane-based adhesion enhancer, and the adhesion enhancer may specifically include a first adhesion enhancer and a second adhesion enhancer.

The first adhesion enhancer may specifically be a silane compound containing a terminal epoxy group, and more specifically, the silane compound containing a terminal epoxy group may specifically contain a glycidoxypropyl group or a (3,4-epoxycyclohexyl)ethyl group. It may be a compound, more specifically, the silane compound containing the terminal epoxy group is 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 2-(3,4-epoxycyclohexyl) It may include one or two or more selected from ethyltrimethoxysilane and 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane.

The second adhesion promoter may specifically be a reaction product of the first adhesion promoter and a silicone compound containing two or more vinyl groups at the ends. Specifically, the silicone compound including two or more vinyl groups at the terminal may be a compound of Formula 1 below, that is, the second adhesion promoter may be a reaction product of the first adhesion promoter and Formula 1 below.

[Formula 1]

By including the first adhesion enhancer and the second adhesion enhancer at the same time, adhesion to the substrate can be increased and durability of the antistatic release film produced can also be improved.

In the antistatic release coating agent according to an embodiment of the present invention, the siloxane-based adhesion promoter may include the first adhesion promoter: the second adhesion promoter in a weight ratio of 1:1.8 to 5, preferably 1:2 to 3.5, By satisfying this range, there is an advantage of maximizing the effect of improving adhesion and improving durability.

In addition, the antistatic release coating agent according to an embodiment of the present invention may include 0.5 to 3 parts by weight, preferably 1 to 2 parts by weight of a siloxane-based adhesion enhancer based on 100 parts by weight of the organopolysiloxane dispersion, and a small amount of the adhesion enhancer When included, it may be difficult to achieve the effect of adding an adhesion enhancer, and when a large amount of the adhesion enhancer is included, adhesion is excessively improved, resulting in inappropriate adhesion as a release film.

The antistatic release coating agent according to the present invention includes organopolysiloxane having a viscosity of 15,000 to 25,000 cP, preferably 17,000 to 23,000 cP at 25 ° C. By satisfying this viscosity, it is easy to control the thickness at the time of forming the release coating layer while maintaining a certain level. There is an advantage of being able to manufacture a release film having the above durability. In this case, the organopolysiloxane may satisfy Formula 2 below.

[Formula 2]

In Formula 2, R ¹ and R ² are each independently an alkenyl group having 2 to 19 carbon atoms including a double bond at the terminal, and m is an integer of 1 or more.

By using an organopolysiloxane containing an alkenyl group satisfying the above-mentioned number of carbon atoms, a crosslinking reaction with a crosslinking agent occurs, securing adhesive strength and exhibiting excellent compatibility with other compositions.

The organopolysiloxane dispersion according to an embodiment of the present invention may contain 20 to 40% by weight of the active ingredient, that is, organopolysiloxane, and the remainder of the solvent, based on the organopolysiloxane containing the dispersion at the above ratio. As a result, the addition amount of other compositions can be adjusted.

In addition, the solvent may be one or two or more selected from benzene, toluene, and xylene, but the present invention is not limited thereto.

The antistatic release coating agent according to the present invention includes a hydrogen siloxane crosslinking agent having a viscosity of 15 to 35 cP at 25 °C. The hydrogen siloxane crosslinking agent may be a compound represented by Formula 2 below, and as can be seen from Formula 2, the hydrogen siloxane crosslinking agent is characterized in that it includes a hydrogen group, that is, hydrogen directly linked to Si, at the terminal.

[Formula 3]

In Formula 3, n is an integer greater than or equal to 1.

The hydrogen siloxane crosslinking agent may have a viscosity of 15 to 35 cP, preferably 17 to 33 cP at 25° C., and when the viscosity is low or high, it may be difficult to control the speed of the crosslinking reaction.

The antistatic pressure-sensitive adhesive coating agent according to an embodiment of the present invention may contain a hydrogen siloxane crosslinking agent in an amount of 0.1 to 1.5 parts by weight, preferably 0.3 to 1.2 parts by weight, based on 100 parts by weight of the organopolysiloxane dispersion, and may contain a small amount of the crosslinking agent. In this case, the crosslinking reaction may not be carried out smoothly, and if a large amount of crosslinking agent is included, there is a problem in that it is difficult to uniformly crosslink the entire film.

The antistatic release coating agent according to an embodiment of the present invention may further include dimethylvinylated and triethylated silica dispersions, and by further including them, release properties can be controlled to prevent foreign matter from being left on the adhesive surface.

The dimethylvinylated and triethylated silica dispersion may include 50 to 70% by weight of dimethylvinylated and triethylated silica, and the balance may include a solvent. By using the dispersed dimethylvinylated and triethylated silica, it is possible to secure uniform film properties. As the solvent, one or two or more selected from benzene, toluene, xylene, and ethylbenzene may be used, but the present invention is not limited thereto.

Specifically, the antistatic release coating agent may include dimethylvinylated and triethylated silica dispersions in an amount of 20 to 30 parts by weight, preferably 22 to 28 parts by weight, based on 100 parts by weight of the organopolysiloxane dispersion, and dimethylvinylated and triethylated silica. When a small amount of the modified silica dispersion is included, release property may be lowered, and when a large amount of dimethylvinylated and triethylated silica dispersion is included, a decrease in adhesion may occur.

In the antistatic release coating agent according to the present invention, the single-walled carbon nanotube dispersion is characterized by including single-walled carbon nanotubes, an amine-based compound, hydrogenated rubber, and a solvent, and the single-walled carbon nanotube dispersion has the above-described composition By satisfying this, single-walled carbon nanotubes can exhibit excellent dispersibility.

The average length of the single-walled carbon nanotubes included in the single-walled carbon nanotube dispersion may be 1 to 5 μm, preferably 1.5 to 4 μm. When the average length of single-walled carbon nanotubes is small, aggregation between carbon nanotubes may occur due to fine particle size, and when the average length of single-walled carbon nanotubes is large, light transmittance may be reduced. In addition, the carbon nanotubes may have an average cross-sectional diameter of 20 nm or less, preferably 15 nm or less.

In addition, the single-walled carbon nanotube dispersion may include 0.2 to 10% by weight, preferably 0.2 to 5% by weight of single-walled carbon nanotubes, and when the single-walled carbon nanotube dispersion contains a small amount of single-walled carbon nanotubes Efficiency may be reduced due to the addition of the single-walled carbon nanotube dispersion, and when a large amount of single-walled carbon nanotubes are included, uniform dispersion in the dispersion may be difficult.

The single-walled carbon nanotube dispersion includes hydrogenated rubber, and preferably, the hydrogenated rubber may be hydrogenated nitrile butadiene rubber. The single-walled carbon nanotube dispersion may include hydrogenated nitrile butadiene rubber in an amount of 5 to 60 parts by weight, preferably 10 to 40 parts by weight, based on 100 parts by weight of the single-walled carbon nanotubes. In this case, the hydrogenated nitrile butadiene rubber may be dispersed in a solvent, but the amount of hydrogenated nitrile butadiene rubber may be added based on the solid content.

When the single-walled carbon nanotube dispersion contains a small amount of hydrogenated nitrile butadiene rubber, the dispersion effect is limited, and when a large amount of hydrogenated nitrile butadiene rubber is included, the effect of improving the dispersibility is not greatly increased, but the carbon nanotube dispersion in the entire dispersion Since the ratio of the tubes is lowered, the addition efficiency of the carbon nanotube dispersion may be lowered.

The amine compounds included in the single-walled carbon nanotube dispersion are methylamine, ethylamine, propylamine, butylamine, hexylamine, heptylamine, octylamine, dioctylamine, trioctylamine, tert-octylamine, and aminoethanol. , aminopropanol, aminobutanol, aminopentanol, aminohexanol, dodecylamine, octadecylamine, tripropylamine, N,N-dimethylbenzylamine, one or two selected from 2-methoxyethylamine and oleylamine It may be more than one, and preferably may include one or two or more selected from aminoethanol, aminopropanol, and aminobutanol. By including such an amine-based compound, it is possible to suppress a rapid increase in viscosity of the single-walled carbon nanotube dispersion and to secure compatibility with other compositions.

The single-wall carbon nanotube dispersion may include 1 to 30 parts by weight, preferably 2 to 25 parts by weight of amine, based on 100 parts by weight of single-wall carbon nanotubes, and when a small amount of amine is included, the viscosity increases excessively and the dispersibility This may be lowered, and when a large amount of amine is added, the effect of improving dispersibility is insignificant, but there is a concern that the effect of adding carbon nanotubes may be inhibited.

In addition, the single-walled carbon nanotube dispersion may include 15,000 to 25,000 parts by weight, preferably 17,000 to 23,000 parts by weight of a solvent, based on 100 parts by weight of the single-walled carbon nanotubes. Accordingly, the single-walled carbon nanotube dispersion has a high viscosity. It may be 10,000 cP or less, preferably 300 to 7,000 cP, preferably 300 to 5000 cP. By satisfying this range, it is possible to ensure compatibility with organopolysiloxane so that the carbon nanotubes can be uniformly dispersed in the adhesive film.

The antistatic release coating solution according to an embodiment of the present invention may include 1 to 10 parts by weight, preferably 2 to 7 parts by weight of a carbon nanotube dispersion, based on 100 parts by weight of the organopolysiloxane, and a small amount of the carbon nanotube dispersion When included, the antistatic effect may be lowered, and when a large amount of the carbon nanotube dispersion is included, the production cost increases and there is a risk that the carbon nanotubes remain after peeling.

The antistatic release coating agent according to one embodiment of the present invention includes a catalyst, and if the catalyst is a conventional catalyst capable of causing a crosslinking reaction by reaction with polysiloxane, it can be freely used. Preferably, the catalyst may be an organic platinum complex catalyst, and more preferably, a dispersion of the organic platinum complex catalyst in polysiloxane may be used.

In the case of using an organic platinum complex catalyst dispersed in polysiloxane, crosslinking imbalance of silicone due to non-uniform mixing of the catalyst can be solved, an antistatic adhesive film having uniform physical properties can be manufactured, and the crosslinking reaction can proceed quickly. There are advantages to being able to

The polysiloxane in which the organic platinum complex catalyst is dispersed may include 1 to 1.5 wt % of the organic platinum complex catalyst, and when a small amount of the organic platinum complex catalyst is included, a decrease in crosslinking efficiency may occur, and the organic platinum complex catalyst may be reduced. When a large amount of catalyst is included, the effect of improving the compatibility of inducing uniform crosslinking may be lowered by dispersing the catalyst in polysiloxane.

Specifically, the polysiloxane in which the organic platinum complex catalyst is dispersed may have a kinematic viscosity of 300 to 500 cSt, preferably 320 to 460 cSt at 25 ° C. By satisfying this viscosity range, organopolysiloxane with relatively high viscosity and low viscosity In relation to the hydrogen siloxane crosslinking agent, compatibility for both can be secured, and if the viscosity is too high or low, compatibility with the organopolysiloxane or hydrogen siloxane crosslinking agent is lowered, and there is a risk of lowering catalyst efficiency.

The antistatic release coating agent according to an embodiment of the present invention may include a catalyst in an amount of 1 to 5 parts by weight, preferably 1.5 to 3 parts by weight, based on 100 parts by weight of the organopolysiloxane dispersion. It may take a lot of time, and there is a risk of non-uniform crosslinking reaction when a large amount of catalyst is included.

The present invention also provides an antistatic release film, and the antistatic release film according to the present invention may be manufactured by coating an antistatic release coating agent according to an embodiment of the present invention. The antistatic release film according to the present invention has excellent release force, peel force, antistatic performance and durability.

The present invention also provides a method for manufacturing an antistatic release film, and the method for manufacturing a release film according to the present invention may use an antistatic release coating agent according to an embodiment of the present invention.

Specifically, the method for manufacturing an antistatic release film according to the present invention includes a first step of washing and drying a substrate, and a second step of corona-treating the washed substrate; and a third step of applying and curing the antistatic release coating agent according to an embodiment of the present invention.

In this case, the substrate may preferably be a PET film or a PET substrate, and the corona treatment may be performed at 150 to 300 mJ/cm 2 , and preferably, the corona treatment may be repeatedly performed 2 or more times, up to 5 times. .

In the third step, the coating thickness of the release coating agent may be 0.5 to 10 μm, and it is apparent that the coating thickness of the coating agent may vary depending on the thickness and purpose of use of the antistatic release film to be manufactured. In addition, the curing may be performed at 100 to 150 ° C. for 0.5 to 10 minutes. When the curing temperature is low, sufficient curing is not possible, and when the curing temperature is high, deformation of the PET substrate may occur. In addition, it is apparent that the curing time may vary depending on the coating thickness of the release coating agent.

Hereinafter, the present invention will be specifically described by Examples and Comparative Examples. The following examples are only for helping understanding of the present invention, and the scope of the present invention is not limited by the following examples.

[Production Example 1]

1. Preparation of carbon nanotube dispersion

12 g of single-walled carbon nanotubes with an average length of about 2.7 μm, 6 g of aminoethanol, 50 g of hydrogenated nitrile rubber having an acrylonitrile content of about 34% by weight and a molecular weight of about 100,000, N-methyl pyrrolidone solvent 3924 g were uniformly mixed to prepare a carbon nanotube dispersion.

1 shows the particle size distribution of single-walled carbon nanotubes used in a carbon nanotube dispersion.

2. Preparation of antistatic release coating agent

A mixture of 100 g of an organopolysiloxane having a viscosity of about 18,000 cP at 25°C, containing 30% by weight of an active ingredient, and the remainder containing toluene, and 25 g of a dimethylvinylated and triethylated silica dispersion (hereinafter referred to as DTS). Then, 900 g of solvent was added and stirred for one hour to prepare a resin dispersion. At this time, as the solvent, a mixture of toluene and methyl ethyl ketone in a weight ratio of 1:1 was used.

After adding 1 g of a hydrogen siloxane crosslinking agent having a viscosity of about 21 cP and stirring for 30 minutes, 1.25 g of an adhesion enhancer and 1.88 g of an organoplatinum complex catalyst having a viscosity of 400 cSt and dispersed in polysiloxane were added thereto. Stir thoroughly for one hour. Thereafter, 3 g of the single-walled carbon nanotube dispersion was additionally added to prepare an antistatic release coating resin composition.

At this time, as the adhesion promoter, (3-glycidoxypropyl)trimethoxysilane was used as the first adhesion promoter, and (3-glycidoxypropyl)trimethoxysilane and the compound of Formula 1 were reacted as the second adhesion promoter. The resulting reaction product was used. The first adhesion enhancer: the second adhesion enhancer was mixed and used in a weight part of 3:7.

In addition, the dimethylvinylated and triethylated silica dispersion was prepared by mixing 60% by weight of dimethylvinylated and triethylated silica, 32% by weight of xylene, and 8% by weight of ethylbenzene.

[Production Examples 2 to 8]

It was prepared in the same way as in Preparation Example 1, but the antistatic release coating agent was prepared by mixing each composition in the weight ratio of Table 1.

[Comparative Production Example 1]

It was prepared in the same content as in Preparation Example 1, but an antistatic release coating was prepared by adding the same amount of multi-walled carbon nanotubes having an average length of about 1.4 μm instead of single-walled carbon nanotubes.

Figure 2 shows the average length of multi-walled carbon nanotubes used in comparative preparation examples.

manufacturing example organo
polysiloxane cross-linking agent adhesion
enhancer catalyst DTS CNT dispersion One 100 One 1.25 1.88 25 3 2 100 0.9 1.5 1.65 27 3.4 3 100 One 0.35 1.88 25 3 4 100 One 2.5 1.88 25 3 5 100 One 1.25 1.88 - 3 6 100 One 1.25 1.88 17 3 7 100 One 1.25 1.88 35 3 8 100 1.4 1.25 1.88 25 3

The antistatic release coating agent prepared in each preparation example was coated on a corona-treated PET film with a bar coater to a final coating thickness of 1 μm, and then cured at 120 ° C. for 1 minute to prepare an antistatic release film. The physical properties of the antistatic release film of each preparation example were measured and the results are shown in Table 2.

At this time, the corona treatment was performed by repeating the corona pre-treatment of 170 mJ / cm 2 twice.

Peel force (gf/in) Residual adhesion rate (%) Antistatic properties
(surface resistance, Ω/□) Preparation Example 1 30 90 10^8 Preparation Example 2 28 90 10^8 Preparation Example 3 15 90 10^8 Production Example 4 67 80 10^8 Preparation Example 5 18 70 10^8 Preparation Example 6 20 75 10^8 Preparation Example 7 11 90 10^8 Preparation Example 8 34 80 10^8 Comparative Preparation Example 1 17 85 10^10

Referring to Table 2, it can be seen that both Preparation Examples and Comparative Preparation Examples have excellent antistatic properties, and in the case of Preparation Examples 1 and 2, it can be confirmed that the peel strength and residual adhesion are excellent, and the same as that of single-walled carbon nanotubes. Even with the composition, it can be confirmed that the residual adhesion rate is low when the multi-walled carbon nanotubes are used.

Claims (11)

an organopolysiloxane dispersion having a viscosity of 15,000 to 25,000 cP at 25° C. and containing a terminal double bond; a hydrogen siloxane crosslinking agent having a viscosity of 15 to 35 cP at 25°C; Siloxane-based adhesion promoter; and a single-walled carbon nanotube dispersion. According to claim 1,
The adhesion enhancer is a silane compound containing a terminal epoxy group as a first adhesion enhancer; and
An antistatic release coating agent comprising a reaction product of the first adhesion promoter as the second adhesion promoter and a silicone compound containing two or more vinyl groups at the terminal. According to claim 1,
An antistatic release coating agent, characterized in that the silicone compound containing two or more vinyl groups at the terminal satisfies the following formula (1).
[Formula 1]

According to claim 2,
The first adhesion promoter: the second adhesion promoter is an antistatic release coating agent, characterized in that mixed in a weight ratio of 1: 1.8 to 5. According to claim 1,
The antistatic release coating agent further comprises a dimethylvinylated and triethylated silica dispersion. According to claim 1,
The organopolysiloxane dispersion is an antistatic release coating agent, characterized in that it contains 1 to 5% by weight of the active ingredient, the remainder of the solvent. According to claim 1,
The single-walled carbon nanotube is an antistatic release coating agent, characterized in that the average length is 1 to 5 ㎛. According to claim 1,
The single-walled carbon nanotube dispersion is an antistatic release coating agent, characterized in that it comprises single-walled carbon nanotubes, an amine-based compound, hydrogenated rubber and a solvent. According to claim 1,
The single-walled carbon nanotube dispersion is an antistatic release coating agent, characterized in that the viscosity is 10,000 cP or less at 25 ℃. According to claim 1,
The single-walled carbon nanotube dispersion is an antistatic release coating agent, characterized in that it contains 0.2 to 10% by weight of single-walled carbon nanotubes. An antistatic release film prepared by applying the antistatic release coating agent of any one of claims 1 to 10.

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