KR20190044711A - Transparent anti-static coating agent composition including water-soluble epoxy resin and the floor coating method using the same - Google Patents

Abstract

The present invention relates to an antistatic water-soluble clear epoxy coating composition and a floor coating method using the same. According to the present invention, the antistatic water-soluble clear epoxy coating composition comprises: a base part including water-soluble epoxy resin, reactive plasticizer, conductive polymer, surfactant, and water; and a hardener part including an amine compound, polyimide, curing accelerator, and water. Moreover, the antistatic water-soluble clear epoxy coating composition does not include inorganic filler and pigment, and the conductive polymer consists of a mixture of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid (PEDOT/PSS), polyaniline, and polypyrrole. Accordingly, excellent transparency is secured with one coating and a uniform resistance is also represented, thereby providing an advantage of representing excellent antistatic property. Moreover, an inorganic solvent is not included, thereby providing an advantage of being environmentally-friendly.

Description

TECHNICAL FIELD [0001] The present invention relates to a water-soluble epoxy transparent coating composition for preventing electrification, and a floor coating method using the same. BACKGROUND ART < RTI ID = 0.0 >

The present invention relates to an antistatic water-soluble epoxy transparent coating composition and a bottom coating method using the same, and more particularly to a highly environmentally friendly floor coating composition having excellent transparency and antistatic property at the same time and containing no organic solvent.

Oil-based paints containing volatile solvents such as toluene, xylene, and benzene generate volatile organic compounds with a large amount of toxicity and act as substances that pollute the environment. Strong regulations are being prepared or implemented in many countries, including the United States.

From this point of view, water-soluble paints are developed to prevent global warming due to organic compounds released to the atmosphere and to protect the environment. As organic compounds are strengthened, water-based paints are required and recommended.

Recently, as a means of solving the problem where the operation error of the precision equipment or the defective product may occur due to the generation of static electricity such as a semiconductor factory, a hospital operating room, an electronic parts assembly factory, a communication facility, or the like, Excellent antistatic coating is applied.

In the case of antistatic paints used in such a working environment, volatile organic solvents may be used, which may jeopardize the safety of workers and cause environmental pollution. In addition, these paints can not have a uniform resistance value in a single coating, and as a result, they can have antistatic properties desired only in a thick film, so that they can be used only within a limited range in which a transparent paint can not be used.

Patent Document 1 discloses a solvent-resistant epoxy antistatic floor coating composition comprising a 15 to 10 wt% spherical white conductive pigment in a solvent-free epoxy floor coating composition containing an epoxy resin, a reactive diluent, a curing agent, a pigment and an additive, And an acicular white conductive pigment in an amount of 30 to 35 wt%, wherein the coating composition has a thickness of about 100 탆 or more, and which can be applied only to the off-white coating of the white system.

On the other hand, Patent Document 2 relates to a water-soluble epoxy coating agent for preventing electrification and a coating method for preventing electrification, which is characterized in that the conductive epoxy resin composition comprises an epoxy resin composition comprising a main portion containing a water-soluble epoxy resin and a curing agent portion containing a water- Discloses a colored antistatic aqueous epoxy resin composition comprising a coloring pigment mixture and a conductive filler at a coating weight of 1 to 12 wt% and a coating film thickness of 80 탆 or more.

However, in Patent Documents 1 and 2, it is very difficult to form an excessively thick coating film in order to obtain antistatic property through uniform resistance, or to ensure transparency of the top coat by using a color pigment and an inorganic filler .

Therefore, it is urgently required to develop a floor coating composition capable of exhibiting an excellent antistatic effect by forming a uniform resistance even through a thin coating film and projecting the pattern of the lower colored paint layer as it is by ensuring high transparency It is true.

[Patent Literature]

Patent Document 1: Korean Patent Publication No. 10-2001-0058990 (July 2006)

Patent Document 2: Korean Patent Publication No. 10-2015-0043254 (Feb.

An object of the present invention is to provide a highly environmentally friendly floor coating composition which has excellent transparency and antistatic property at the same time and does not contain an organic solvent.

An antistatic water-soluble epoxy clear coating composition according to an embodiment of the present invention includes a main portion including a water-soluble epoxy resin, a reactive plasticizer, a conductive polymer, a surfactant, and water; And a curing agent portion comprising an amine compound, a polyamide, a curing accelerator, and water, wherein the conductive polymer does not include an inorganic filler and a pigment, and the conductive polymer is poly (3,4-ethylenedioxythiophene) -polystyrene sulfonate PEDOT / PSS), polyaniline, and polypyrrole.

In another embodiment of the present invention, the conductive polymer comprises 40 to 60 parts by weight of polyaniline and 100 to 60 parts by weight of polypyrrole per 100 parts by weight of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) (PEDOT / PSS), polyaniline and polypyrrole may be mixed in a proportion of 40 to 60 parts by weight based on 100 parts by weight of the total amount of the poly (3,4-ethylenedioxythiophene).

In the antistatic water-soluble epoxy transparent coating composition according to another embodiment of the present invention, the coating composition may be a two-part type in which the main part and the curing agent are separated.

In the waterproof epoxy transparent coating composition for antistatic properties according to another embodiment of the present invention, the curing agent may be included in an amount of 0.8 to 1.2 parts by weight based on 3 parts by weight of the main portion.

According to another embodiment of the present invention, the water-soluble epoxy coating composition for antistatic treatment is prepared by reacting a bisphenol A-based or bisphenol F-based epoxy resin having an epoxy equivalent of 180 to 600 with polyethylene oxide (PEO) Or may be prepared by diluting the resulting product with water.

According to another embodiment of the present invention, there is provided an antistatic water-soluble epoxy clear coating composition, wherein the reactive plasticizer is selected from the group consisting of aliphatic glycidyl ether (LGE), butyl glycidyl ether (BGE), phenyl glycidyl ether Phenyl glycidyl ether, CGE, O-cresol glycidyl ether, EHGE, 2-ethylhexyl glycidyl ether, 1,4- Butanediol diglycidyl ether, 1,4-butanediol glycidyl ether, neopentyl glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, 1,4-butanediol diglycidyl ether, 6HDDGE, 1,6-hexanediol diglycidyl ether, polypropylene glycol diglycidyl ether (PPDEGE), and ethylene glycol diglycidyl ether (EGDGE) One from the county Or more.

In an antistatic water-soluble epoxy clear coating composition according to another embodiment of the present invention, the surfactant may be a modified polyurethane or a modified acrylate.

According to an embodiment of the present invention, there is provided a floor coating method comprising: forming a colored paint layer on a floor; And applying a composition according to any one of claims 1 to 6 on the colored coating layer to form a transparent antistatic layer, wherein the thickness of the transparent antistatic layer may be 10 to 15 占 퐉.

When the bottom coating is carried out using the water-soluble epoxy transparent coating composition according to the present invention, excellent transparency can be secured even with only a single coating, and uniform resistance can be exhibited, thereby exhibiting excellent antistatic properties. Particularly, The transparent coating composition according to the present invention does not contain an organic solvent and has a very environmentally advantageous advantage.

Before describing the invention in more detail, it is to be understood that the words or words used in the specification and claims are not to be construed in a conventional or dictionary sense, It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the constitution of the embodiments described in the present specification is merely a preferred example of the present invention, and does not represent all the technical ideas of the present invention, so that various equivalents and variations And the like.

The present invention relates to an antistatic water-soluble epoxy transparent coating composition and a bottom coating method using the same, and more particularly to a highly environmentally friendly floor coating composition having excellent transparency and antistatic property at the same time and containing no organic solvent.

Generally, in a semiconductor factory, a hospital operating room, an electronic component assembly factory, and a communication-related facility, a very large problem may occur due to the generation of fine static electricity.

On the other hand, when various flooring materials are used to form various patterns on the floor, it is necessary to form a very thick antistatic layer on the antistatic coating composition in order to achieve the antistatic performance normally required when the conventional antistatic coating composition is applied thereon. There was a problem to be covered.

In addition, when a conventional antistatic coating composition is used, it is necessary to perform several repetitive film forming operations because it is insufficient by only one coating operation to exhibit a high antistatic effect. Therefore, it is very troublesome to work and is very inefficient in terms of construction time and cost .

Particularly, in the conventional antistatic coating composition, various volatile organic solvents have to be used for uniform dispersion of the conductive material and other resin components. Accordingly, the volatile organic solvent is inhaled through the respirator of the worker, And the surrounding environment of the workplace is contaminated.

Accordingly, the present inventors have found that, in order to solve the above problems, it is possible to achieve highly uniform antistatic effect by coating with a single thin film without using a volatile organic solvent, and at the same time, A groundbreaking floor coating composition has been developed.

The water-soluble epoxy transparent coating composition for antistatic property according to the present invention is a two-part type composition consisting of a main part and a curing agent part, and a mixture of a main part and a curing agent part can be used during floor coating.

The subject part included in the coating composition according to the present invention includes a water-soluble epoxy resin, a reactive plasticizer, a conductive polymer, a surfactant, and water.

Wherein each component constituting the subject portion comprises 10 to 50% by weight of a water soluble epoxy resin, 1 to 15% by weight of a reactive plasticizer, 1 to 3% by weight of a conductive polymer, 1 to 10% by weight of a surfactant and 10 to 90% do.

When the content of the epoxy resin is less than 10% by weight in the main part, the efficiency and transparency of the top coat are deteriorated. When the content exceeds 50% by weight, the antistatic property and the uniform dispersibility are deteriorated There is a problem.

If the content of the reactive plasticizer is less than 1 wt%, the plasticizing efficiency of the subject portion is lowered. If the content of the reactive plasticizer is more than 15 wt%, uniform dispersion and mixing efficiency of the respective components may be deteriorated.

When the content of the conductive polymer is less than 1% by weight in the main portion, the antistatic efficiency is lowered. When the content of the conductive polymer is more than 3% by weight, there is an uneconomical problem.

In the case of less than 10% by weight of water, it is difficult to evenly disperse and dilute the main component, and when the amount exceeds 90% by weight, the content of the remaining components is lowered, The prevention efficiency may be lowered.

Meanwhile, the curing agent part included in the coating composition according to the present invention includes an amine compound, a polyamide, a curing accelerator, and water.

Each component constituting the hardener portion is composed of 1 to 30% by weight of an amine compound, 10 to 50% by weight of a polyamide, 0.5 to 15% by weight of a curing accelerator and 10 to 60% by weight of water.

As the amine compound contained in the hardener, aliphatic modified amine or water-dispersed polyamine can be used. When the content of the amine compound is less than 1% by weight, the curing efficiency is lowered. When the content of the amine compound exceeds 30% The coating film working efficiency may be lowered due to excessive curing.

As the polyamide contained in the hardener, polyamide or water-dispersed polyamide can be used. When the content of polyamide is less than 10% by weight, the curing efficiency may be lowered. When the content of polyamide exceeds 50% by weight, The coating film working efficiency may be lowered.

When the content of the curing accelerator is less than 0.5% by weight, the curing efficiency may be lowered, and if the content of the curing accelerator is less than 15% by weight, the curing accelerator may be used. The efficiency of coating film working may be lowered due to excessive curing.

The antistatic composition according to the present invention is characterized in that various components are diluted with water instead of using a volatile organic solvent as a diluent at all.

Water used in the present invention may be water generally used, such as distilled water, tap water, shallow water, ground water soft water, and hard water, but the kind of water is not particularly limited.

The present invention may further include a defoaming agent and a leveling agent together with the main portion and the hardener portion. As the defoaming agent, fatty acid amide, polyethyleneglycol, polypropylene glycol, dimethylpolysiloxane compound or non-silicone polymer may be used. The fluorine-based leveling agent, nonionic-type polyacrylic copolymer, polyether or polydimethylsiloxane compound and the like may be used as the zero.

Particularly, it is characterized in that it does not contain a colored inorganic filler and a pigment in addition to the components contained in the main part and the curing agent part of the present invention.

That is, the coating composition of the present invention is characterized in that it does not contain any colorant inorganic filler and pigment used in conventional antistatic coating composition, so that a highly transparent antistatic layer can be formed on the colored paint layer .

Meanwhile, the conductive polymer used in the present invention may be a poly (3,4-ethylenedioxythiophene) -polystyrene sulfonate (PEDOT / PSS) dispersion, polyaniline, polypyrrole or a mixture thereof.

In particular, the present inventors have found out that when a PEDOT / PSS dispersion, polyaniline, and polypyrrole are mixed at a certain ratio, antistatic properties remarkably excellent even with a very thin coating film can be exhibited.

That is, in one embodiment of the present invention, the conductive polymer may include 40 to 60 parts by weight of polyaniline per 100 parts by weight of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) polystyrene sulfonic acid (PEDOT / PSS), polyaniline and polypyrrole in a proportion of 40 to 60 parts by weight of polypyrrole.

The conductive polymer prepared by mixing poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT / PSS): polyaniline: polypyrrole in a weight ratio of 100: 40 to 60: 40 to 60 It has been found that a remarkably excellent antistatic property can be exhibited even with a very thin coating film.

 In particular, the present invention has been developed for the purpose of forming an antistatic layer on a colored paint layer in which various colors and patterns are formed on a lower layer. Thus, the composition according to the present invention can obtain a very uniform resistance value even with a very thin coating layer alone So that the colored paint layer can be projected onto the transparent antistatic coating layer as it is. Thus, both the excellent antistatic property and the bottom pattern retention can be achieved at the same time.

In the antistatic water-soluble epoxy transparent coating composition according to one embodiment of the present invention, the main portion and the curing agent portion may be mixed with 0.8 to 1.2 parts by weight of the curing agent portion relative to 3 parts by weight of the main portion.

Meanwhile, in the water-soluble epoxy clear coating composition for antistatic property according to an embodiment of the present invention, the water-soluble epoxy resin is reacted with a bisphenol A or bisphenol F epoxy resin having an epoxy equivalent of 180 to 600 and polyethylene oxide (PEO) KEM-128M-70, KEM-134M-60, KEM-101M-50 and the like, which are available from Kukdo Chemical, can be used.

In the waterproof epoxy clear coating composition for antistatic effect according to an embodiment of the present invention, the reactive plasticizer is selected from the group consisting of aliphatic glycidyl ether (LGE), butyl glycidyl ether (BGE), phenyl glycidyl ether Phenyl glycidyl ether, CGE, O-cresol glycidyl ether, EHGE, 2-ethylhexyl glycidyl ether, 1,4- Butanediol diglycidyl ether, 1,4-butanediol glycidyl ether, neopentyl glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, 1,4-butanediol diglycidyl ether, 6HDDGE, 1,6-hexanediol diglycidyl ether, polypropylene glycol diglycidyl ether (PPDEGE), and ethylene glycol diglycidyl ether (EGDGE) One from the county It may be selected.

In the water-soluble epoxy transparent coating composition for antistatic agent according to an embodiment of the present invention, the surfactant may be a modified polyurethane or a modified acrylate.

The bottom coating method according to an embodiment of the present invention includes the steps of forming a colored paint layer on a floor and applying various antistatic compositions according to various embodiments of the present invention on the colored paint layer to form a transparent antistatic layer . ≪ / RTI >

The thickness of the transparent antistatic layer may be 10 to 15 占 퐉.

Hereinafter, specific examples of forming an antistatic coating layer using the antistatic water-soluble epoxy transparent coating composition according to the present invention and various comparative examples in which the effects of the present invention can be clearly compared and confirmed will be described.

Examples 1 to 10

The main part and the hardener part were prepared by the ingredient contents as shown in Table 1 below, and the antistatic composition according to the present invention was prepared by mixing the main part and the hardener part evenly.

Example One 2 3 4 5 6 7 8 9 10


Topic section


EP 2500 2500 2500 2500 2500 2500 2500 3000 3000 3000 RP 1100 1100 1100 1100 1100 1100 1100 1100 1100 1100 PPSS 100 100 100 100 100 100 100 100 100 100 PA 20 30 40 40 50 60 70 80 90 100 PP 30 40 60 50 40 40 40 30 50 20 SF 120 120 120 120 120 120 120 120 120 120 water 6000 6000 6000 6000 6000 6000 6000 6000 6000 6000
Hardener part
AC 350 350 350 350 350 350 350 350 350 350 PAM 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 PHE 100 100 100 100 100 100 100 100 100 100 water 1350 1350 1350 1350 1350 1350 1350 1350 1350 1350

(Unit: g)

PP: Polypyrrole, PP: Polypyrrole, SF: Surfactant, AC: Amine compound (number: 1) Dispersed polyamine), PAM: polyamide (water-dispersed polyamide), PHE: curing accelerator (phenol)

Comparative Examples 1 to 10

The main part and the hardener part were prepared by the ingredients as shown in Table 2 below, and the antistatic composition according to the comparative example was prepared by mixing the main part and the hardener part evenly.

Comparative Example One 2 3 4 5 6 7 8 9 10
Topic section




EP 2500 2500 2500 2500 2500 2500 2500 3000 3000 3000 RP 1100 1100 1100 1100 1100 1100 1100 1100 1100 1100 PPSS 100 100 100 100 100 200 0 0 100 0 PA 20 30 40 40 50 0 200 0 100 100 PP 30 40 60 50 40 0 0 200 0 100 SF 120 120 120 120 120 120 120 120 120 120 toluene 6000 6000 6000 6000 6000 0 0 0 0 0 water 0 0 0 0 0 6000 6000 6000 6000 6000
Hardener part
AC 350 350 350 350 350 350 350 350 350 350 PAM 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 PHE 100 100 100 100 100 100 100 100 100 100 toluene 1350 1350 1350 1350 1350 0 0 0 0 0 water 0 0 0 0 0 1350 1350 1350 1350 1350

(Unit: g)

PP: Polypyrrole, PP: Polypyrrole, SF: Surfactant, AC: Amine compound (number: 1) Dispersed polyamine), PAM: polyamide (water-dispersed polyamide), PHE: curing accelerator (phenol)

[Surface resistance test]

Using the compositions of Examples 1 to 10 and Comparative Examples 1 to 10, an antistatic layer having a thickness of 15 탆 was formed on the colored coat layer printed with the pattern, and the surface resistance of the antistatic layer was tested. Respectively.

[Surface resistance uniformity test]

Using the compositions of Examples 1 to 10 and Comparative Examples 1 to 10, an antistatic layer having a thickness of 15 mu m was formed on the colored coating film printed with the pattern. Ten areas on the antistatic layer were randomly selected, The results are shown in Table 3 below.

[Film transparency test]

Using the compositions of Examples 1 to 10 and Comparative Examples 1 to 10, an antistatic layer having a thickness of 15 占 퐉 was formed on the colored coat layer printed with the pattern, and the sharpness of the pattern of the colored coat layer penetrated into the antistatic layer (1: very clear, 2: clear, 3: normal, 4: cloudy, 5: extremely cloudy) according to the sharpness of the pattern, and the results are shown in Table 3 below .

[Bond strength test]

An antistatic layer having a thickness of 15 mu m was formed on the colored coating layer printed with the patterns using the compositions of Examples 1 to 10 and Comparative Examples 1 to 10 and the adhesion strength (N / mm < 2 >) of the antistatic layer was tested. The results are shown in Table 3 below.

division Surface Resistance (Ω) Surface resistance variation (Ω) Film transparency Bond strength (N / mm2) Example 1 10 ^8.9 ± 10 ^0.05 One 2.3 Example 2 10 ^8.6 ± 10 ^0.05 One 2.3 Example 3 10 ^8.2 ± 10 ^0.01 One 2.7 Example 4 10 ^8.3 ± 10 ^0.01 One 2.8 Example 5 10 ^8.2 ± 10 ^0.01 One 2.8 Example 6 10 ^8.1 ± 10 ^0.01 One 2.9 Example 7 10 ^8.1 ± 10 ^0.05 2 2.3 Example 8 10 ^8.4 ± 10 ^0.05 2 2.4 Example 9 10 ^8.3 ± 10 ^0.05 2 2.3 Example 10 10 ^8.7 ± 10 ^0.05 2 2.4 Comparative Example 1 10 ^9.8 ± 10 ^0.2 5 2.1 Comparative Example 2 10 ^9.9 ± 10 ^0.3 5 2.1 Comparative Example 3 10 ^9.8 ± 10 ^0.3 5 1.9 Comparative Example 4 10 ^9.7 ± 10 ^0.2 5 2.0 Comparative Example 5 10 ^9.8 ± 10 ^0.3 5 1.9 Comparative Example 6 10 ^9.7 ± 10 ^0.4 4 2.1 Comparative Example 7 10 ^9.9 ± 10 ^0.3 4 2.1 Comparative Example 8 10 ^9.8 ± 10 ^0.3 4 2.1 Comparative Example 9 10 ^9.7 ± 10 ^0.3 4 2.0 Comparative Example 10 10 ^9.6 ± 10 ^0.2 4 2.0

As can be seen from the results of Table 3, Examples 1 to 10 of the present invention have excellent surface resistance and uniformity of surface resistance compared to Comparative Examples 1 to 10.

In addition, in the case of the present invention, it can be confirmed that the coating film transparency and the adhesion strength are superior to the comparative example.

In particular, Examples 3 to 6 of the present invention show particularly excellent surface resistance uniformity and film transparency, and it can be confirmed that the adhesive strength is also excellent at the same time.

Claims (8)

A water-soluble epoxy resin, a reactive plasticizer, a conductive polymer, a surfactant, and water; And
A curing agent portion comprising an amine compound, a polyamide, a curing accelerator, and water,
Inorganic fillers and pigments,
Wherein the conductive polymer is a mixture of poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT / PSS), polyaniline, and polypyrrole. The method according to claim 1,
The conductive polymer
40 to 60 parts by weight of polyaniline and 40 to 60 parts by weight of polypyrrole per 100 parts by weight of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS)
Wherein the antistatic agent is a mixture of poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT / PSS), polyaniline and polypyrrole. The method according to claim 1,
The coating composition
A two-part type antistatic water-soluble epoxy transparent coating composition wherein the main part and the curing agent are separated. The method according to claim 1,
Wherein the curing agent portion is contained in an amount of 0.8 to 1.2 parts by weight based on 3 parts by weight of the main portion. The method according to claim 1,
The water-soluble epoxy resin
Wherein the bisphenol A-based or bisphenol F-based epoxy resin having an epoxy equivalent of 180 to 600 is reacted with polyethylene oxide (PEO) to dilute the product with water to prepare an antistatic water-soluble epoxy clear coating composition. The method according to claim 1,
The reactive plasticizer may be selected from the group consisting of aliphatic glycidyl ether (LGE), butyl glycidyl ether (BGE), phenyl glycidyl ether (PGE), O-cresol glycidyl ether (CGE, O-cresol glycidyl ether), 2-ethylhexyl glycidyl ether (EHGE), 1,4-butanediol glycidyl ether (1,4BDDGE) , Neopentyl glycol diglycidyl ether (NPGDGE), 1,6-hexanediol diglycidyl ether (1,6-hexanediol diglycidyl ether), polypropylene glycol diglycidyl Wherein the antistatic agent is at least one selected from the group consisting of PPDEGE, polypropylene glycol diglycidyl ether, and ethylene glycol diglycidyl ether (EGDGE), or a mixture thereof. The method according to claim 1,
Wherein the surfactant is a modified polyurethane or a modified acrylate. Forming a colored paint layer on the floor; And
Applying a composition according to any one of claims 1 to 7 on the colored coating layer to form a transparent antistatic layer,
Wherein the thickness of the transparent antistatic layer is 10 to 15 占 퐉.