KR20110065642A - Antistatic coating composition and coated film, method for the coated film using the composition - Google Patents

Abstract

PURPOSE: An antistatic coating composition is provided to reduce a manufacturing process by one step or more and to ensure excellent antistatic property by performing antistatic treatment, anti-fouling treatment and water repellent treatment at one time. CONSTITUTION: An antistatic coating composition comprises a conductive polymer and organic modified polysiloxane as an additive. An antistatic coating film includes a base film and a coating layer of the coating composition coated on the base film. A method for preparing the antistatic coating film comprises a step of coating the coating composition on the base film and drying the coating film. The antistatic coating film has a surface resistance value of 10^4~10^10 Ω/sq.

Description

Antistatic coating composition, antistatic coating film using same and manufacturing method thereof {Antistatic coating composition and coated film, method for the coated film using the composition}

The present specification describes an antistatic coating composition, an antistatic coating film using the same, and a method of manufacturing the same. More specifically, the present invention relates to an antistatic coating composition having excellent water repellency and antifouling properties, an antistatic coating film using the same, and a manufacturing method thereof.

As various semiconductors and electronic devices are miniaturized and highly integrated, the generation of static electricity causes various problems in the product. In order to effectively remove static electricity, an antistatic coating method using a conductive material has been proposed. Currently, such a coating technology is used in an antistatic coating film of a display device, a tray for transporting semiconductor devices, a protective film of a polarizing plate and a backlight unit, and a coating film of a transparent lens.

The antistatic coating layer may be made of a non-conductive polymer including a conductive additive such as a metal particle such as aluminum, carbon black, and a surfactant having an ion conductivity when reacted with moisture, or a conductive polymer having a conductivity thereof.

A conductive polymer material having good adhesion among various conductive materials has recently been in the spotlight in various industrial fields.

In the antistatic coating composition comprising the conductive polymer, the inventors of the present invention not only have excellent antistatic properties, but also prevent water repellency and contamination or contamination by minimizing a contact surface when water is in contact. The present invention provides an antistatic coating composition that provides antifouling properties so that it can be easily removed even if it occurs, an antistatic coating film using the same, and a method of manufacturing the same. In addition, antistatic, water repellent, antifouling treatment is performed at a time without a separate treatment, having an excellent antistatic performance, but also reduce the manufacturing process by one or more steps, an antistatic coating composition using the same, and an antistatic coating film using the same It is intended to provide a manufacturing method.

In embodiments of the present invention, as an antistatic coating composition comprising a conductive polymer, the composition provides an antistatic coating composition comprising an organic modified polysiloxane as an additive.

Another embodiment of the present invention provides an antistatic coating film comprising a base film and a coating layer of the coating composition formed on the base film.

Another embodiment of the present invention provides a method for producing an antistatic coating film comprising coating the coating composition on a base film and then drying.

According to the embodiments of the present invention, an antistatic coating which can easily achieve not only an antistatic function, which is required for various electronic components or liquid crystal displays, but also a water repellent and antifouling performance required especially when optically used. A composition and a coating film can be provided. Since the coating composition and the coating film are excellent in antistatic performance, it is possible to prevent the adhesion of foreign matter during the manufacture, transportation and use of the product having the coating film.

In addition, the production method of the coating film is to achieve the antistatic performance, water repellent and antifouling performance at the same time, and also the process is simple and has a process advantage. Since the antistatic coating film has excellent antistatic function and has water repellency and antifouling property, it can be applied to various fields of various electric parts, semiconductors, and display industries.

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

In embodiments of the present invention, an additive containing an organic modified polysiloxane is added to the antistatic coating composition including the conductive polymer to impart water repellency and antifouling property. By forming the material showing the water repellent and antifouling performance, etc. in a single layer by mixing with the conductive polymer without forming a separate layer, it can be provided with antistatic properties, water repellent and antifouling properties in a simplified process.

In this way, the water-repellent and antifouling additives are added to the antistatic coating composition containing the conductive polymer to prevent product damage due to foreign matter adhesion during the manufacturing process of various electric parts and semiconductors (e.g., during the production process for liquid crystal displays). It can prevent the damage of circuit and chip from static electricity, and it has the excellent water repellent and antifouling effect during manufacturing and processing.

For reference, after the coating layer is formed of the coating composition, a separate water repellent or antifouling layer may be separately stacked thereon. However, this may be a factor in the product price increase as more than two steps are added as described above. In addition, when introducing a separate water repellent or antifouling layer forming process, there is a possibility that defects such as scratches may occur, it is preferable to provide all of the antistatic, water repellent and antifouling properties to one layer.

Therefore, the antistatic coating composition according to the exemplary embodiment of the present invention is intended to include an additive containing an organic modified polysiloxane which is a water repellent and antifouling additive in a coating composition comprising a conductive polymer. Here, the water-repellent and antifouling additives may comprise 0.01 to 1% by weight, preferably 0.03 to 0.7% by weight, more preferably 0.05 to 0.5% by weight, even more preferably 0.1 to 0.3% by weight based on the total weight of the composition. have.

In a non-limiting example, the coating composition comprises 1 to 30 wt% conductive polymer, 5 to 25 wt% binder resin, 5 to 30 wt% alcohol solvent, 10 to 50 wt% water, 0.01 to 1 wt% And water repellent and antifouling additives.

In an exemplary embodiment of the present invention, the conductive polymer may be polythiopene, polypyrrole, polyaniline, or the like, and in particular, polyethylene dioxiyhiophene (PEDOT) is used. It is preferable.

In an exemplary embodiment of the present invention, the binder may use a binder resin of a water-soluble or organic solvent type. The binder resin is preferably used alone or in combination of one or more of the binder resin having a functional group of at least one of an acrylic group, urethane group, epoxy group, amide group, hydroxyl group or silane group. When adding a water repellent and antifouling additive according to embodiments of the present invention, the functional group of the binder resin can be selected according to the desired surface resistance and contact angle. As a non-limiting example, the binder resin is preferably polyacrylate.

In the antistatic coating film, the range of surface resistance can be said to be excellent in antistatic properties when the requirements of 10 ⁴ ~ 10 ¹⁰ Ω / sq. In terms of antistatic properties, it is preferable to use 1 to 30% by weight of the conductive polymer and 5 to 25% by weight of the binder.

In a non-limiting embodiment of the invention, the alcohol solvent is preferably an aliphatic alcohol having 1 to 5 carbon atoms. As the carbon number increases, the intermolecular attraction becomes large, so that it is less dispersed in water, and it is preferable to use an aliphatic alcohol having 1 to 5 carbon atoms in view of easy dispersion.

The organic modified polysiloxane used in the embodiments of the present invention is not particularly limited as long as the organic modified polysiloxane is modified with an organic resin.

The organic modified polysiloxane may be easily removed by forming water in a small area as much as possible when preparing an antistatic film using an antistatic composition containing the conductive polymer, and may also prevent contamination by polar substances and oils. .

Specifically, the organic modified polysiloxane has a property of repelling water or a material containing water and also serves to lower the surface tension. Measuring the contact angle of the coated surface with water, including the compound containing silicon, can cause the water droplets to form a large angle without spreading, in particular, a polysiloxane compound modified with an organic resin among the compound containing silicon Silver has a functional group made of hydrocarbon, etc., such a functional group is able to orient to the surface after coating to push the water droplet unit. In addition, the organic modified polysiloxane is preferably low in polarity in that it should exhibit properties for repelling the polar material containing water.

In a non-limiting example, as the additive containing the organic modified polysiloxane, one containing an organic modified polysiloxane (such as 30 to 50% by weight) in a solvent (such as alcohol such as butanol) may be used.

In a non-limiting example, as the additive, an organic modified polysiloxane compound further modified with fluorine may be used alone or in combination with an organic modified polysiloxane. The organic modified polysiloxane modified with fluorine has excellent slip property.

In a non-limiting example, to the additive, in addition to the organic modified polysiloxane compound, in order to further impart a water repellent, antifouling or slip effect, acrylic, urethane, fluorine, silicone-based additives may be further used. In a non-limiting example, the additional additive may be at least one of an acrylic resin modified or not modified with fluorine or silicone, or a urethane based resin modified or not modified with fluorine or silicone.

In a non-limiting example, as the additive, an acrylate resin or an acrylic modified fluorocarbon modified with fluorine may be further used, and a hydrocarbon-based wax having a small polarity may be further used. For reference, acrylate resins modified with fluorine or acrylic modified fluorocarbons are preferable because they are excellent in antistatic properties when used with conductive polymers, like organic modified polysiloxanes.

The additive containing the organic modified polysiloxane may be used together with alcohol, which is water or an organic solvent, as mentioned above. It is preferable to use it in solution state with water or an organic solvent from a water repellency and antifouling property.

In the embodiments of the present invention, the additive further used may be selected in consideration of the solubility for water-based coatings and organic solvent-based coatings, respectively. For reference, when the coating layer is formed by using an additive for water repellency, the thickness thereof may be used by forming one layer with 0.01 to 1 micrometer.

After coating the antistatic agent, the effect can be observed the degree of spread or the size of water droplets generated by spraying water. The contact angle is measured by a known contact angle measuring equipment in the aqueous and oily state is generally evaluated as a contact angle between 60 ~ 120 degrees, the larger the contact angle can be said to be excellent in water repellency and antifouling.

In embodiments of the present invention, the method for producing an antistatic coating film includes coating and coating the coating composition on a base film.

By using the antistatic coating composition prepared by the above method and forming an antistatic coating film, it is possible to easily form a coating film having anti-static as well as a water repellent and antifouling function.

Hereinafter, one or more exemplary embodiments of the present invention will be described in more detail through non-limiting and exemplary embodiments.

Comparative Example 1

The coating agent was added to the antistatic coating solution (polyethylene dioxiyhiophene (PEDOT) without adding any additives. The coating composition was 30% by weight PEDOT, 20% by weight binder resin (polyacrylate), 20% by weight water. And 30% by weight of alcohol, followed by further stirring for 1 hour, using a coating composition, coated on a polyethylene terephthalate resin (PET) by a bar coat method, and dried at 150 ° C. for 30 seconds.

Example 1

The coating agent was added to an antistatic coating liquid (polyethylene dioxiyhiophene (PEDOT) by adding an organic modified polysiloxane (AFCONA-3085). 20% by weight of water, 29.9% by weight of alcohol and 0.1% by weight of organomodified polysiloxane (AFCONA-3085) were further stirred for 1 hour, and then coated on a polyethylene terephthalate resin (PET) by a bar coating method using a coating composition. And dried at 150 ° C. for 30 seconds.

[Example 2]

Except for using a fluorine-containing organic modified polysiloxane (AFCONA-3034) as an additive was prepared in the same manner as in Example 1. The blending ratio was blended with 30% by weight of PEDOT, 20% by weight of binder resin (polyacrylate), 20% by weight of water, 29.9% by weight of alcohol, and 0.1% by weight of fluorine-containing organic modified polysiloxane (AFCONA-3034).

Comparative Example 2

To contrast with other fluorine modified resins, fluorine modified polyacrylates were used as additives. It was prepared in the same manner as in Example 1 except that fluorine-modified polyacrylate (AFCONA-3570) was used. The blending ratio was blended with 30% by weight of PEDOT, 20% by weight of binder resin (polyacrylate), 20% by weight of water, 29.9% by weight of alcohol and 0.1% by weight of fluorine-modified polyacrylate (AFCONA-3570).

Comparative Example 3

In order to contrast with a resin containing fluorine and no siloxane, it was prepared in the same manner as in Example 1 except that acrylic modified fluorocarbon (AFCONA-3772) was used as an additive. The blending ratio was 30% by weight of PEDOT, 20% by weight of binder resin (polyacrylate), 20% by weight of water, 29.9% by weight of alcohol and 0.1% by weight of acrylic modified fluorocarbon (AFCONA-3772).

[Property test]

Contact angle, surface resistance, slipperiness, and coating appearance were respectively evaluated as follows.

(1) contact angle

The contact angle was measured in aqueous using KRUSS DSA100 contact angle measuring instrument. 2.5 μl of water was constantly dropped on the coating film to calculate the average.

(2) surface resistance

The surface resistance of the coating film was measured using ST-3, a surface resistance measuring instrument of SIMCO. The smaller the surface resistance value, the better the antistatic effect.

(3) slip

The coefficient of friction was measured using a slip tester manufactured by TOYOSEIKI. After placing a heavy weight of 200g on the coating surface was moved to a point 40mm further was measured the static friction, dynamic friction coefficient.

(4) coating appearance

The external appearance state of the film was visually observed, and the external appearance state of the film was determined by three types of inferior, normal, and excellent.

Table 1 shows the test results.

Performance item Comparative Example 1 Example 1 Example 2 Comparative Example 2 Comparative Example 3 Contact angle (°) 65 117 Not measurable
(Expansion) 61 88 Surface resistance (Ω / sq) 10 ^ 5.7 10 ^ 6.2 10 ^ 6.2 10 ^ 6.1 10 ^ 6.1 Slip property (static friction) 0.28 1.02 0.72 0.32 0.36 Slip Castle (Dynamic Friction) 0.24 0.63 0.76 0.23 0.24 Coating appearance Great Great Great Great Great

As can be seen in Example 1, when the coating film is formed with the coating solution, the contact angle is large, so that the water repellency is excellent and the antistatic property is excellent. It also showed excellent slip properties and coating appearance.

In particular, in the case of Example 1 using an organic modified polysiloxane it can be seen that the contact angle is greatly improved. Accordingly, the water repellency and antifouling function of the film is increased to prevent contamination during water washing. In addition, despite the addition of the additive did not significantly affect the surface resistance. On the other hand, in the case where fluorine-containing organic modified polysiloxane (Example 2) was added, the contact angle was widened when the contact angle was measured. Example 2 was particularly excellent in slip properties as in Example 1.

Claims (11)

In the antistatic coating composition comprising a conductive polymer, The composition is an antistatic coating composition comprising an organic modified polysiloxane as an additive. The method of claim 1, The composition is an antistatic coating composition comprising the additive in 0.01 to 1% by weight of the total composition. The method of claim 1, The composition is an antistatic coating composition consisting of 1 to 30% by weight conductive polymer, 5 to 25% by weight binder resin, 5 to 30% by weight alcohol, 10 to 50% by weight water and 0.01 to 1% by weight of the additive. The method of claim 1, The conductive polymer is polyethylene dioxythiophene antistatic coating composition. The method of claim 1, The additive further comprises at least one of an acrylic resin, a fluorine-modified polysiloxane or a urethane-based resin modified or not modified with fluorine-modified or modified with fluorine. The method of claim 1, The additive is an antistatic coating composition of one or two or more of organic modified polysiloxane, fluorine-containing organic modified polysiloxane, fluorine modified polyacrylate, or acrylic modified fluorocarbon. The method of claim 3, wherein The binder resin is an antistatic coating composition having at least one functional group of an acryl group, urethane group, epoxy group, amide group, hydroxyl group or silane group. The method of claim 3, wherein The alcohol is an antistatic coating composition of 1 to 5 carbon atoms aliphatic alcohol. Base film; And An antistatic coating film comprising a; coating layer of the coating composition of any one of claims 1 to 8 coated on the base film. The method of claim 9, The antistatic coating film is an antistatic coating film having a surface resistance value of 10 ⁴ ~ 10 ¹⁰ Ω / sq. A method for producing an antistatic coating film comprising coating the coating composition of any one of claims 1 to 8 and then drying the coating composition.