KR100372830B1 - Anticorrosive coating composition having high hardness - Google Patents

Abstract

The present invention relates to a high hardness anti-corrosion coating composition, which is used in the coating industry, such as concrete and steel structures, easy to handle at room temperature or low temperature, as well as preventing environmental pollution when working in wet or underwater conditions, It has the effect of having wear resistance and ductility.

Description

High hardness anti-corrosion coating composition {ANTICORROSIVE COATING COMPOSITION HAVING HIGH HARDNESS}

The present invention relates to a high hardness anti-corrosion coating composition, and more particularly used in the coating industry, such as concrete and steel structures, easy to handle even at room temperature or low temperature, to prevent environmental pollution when working in wet or underwater conditions In addition, the present invention relates to a high hardness anti-corrosion coating composition having wear resistance, ductility, and the like.

Conventionally, coating materials using general epoxy resins have been mainly used, but the above general epoxy resins have various effects such as deterioration of adhesion between coating film and concrete and steel structures, peeling phenomenon due to difference in thermal expansion coefficient, poor weather resistance, etc. Problems are occurring.

In addition, in the coating industry of concrete and steel structures, the necessity of a certain composition that is easy to handle at room temperature or low temperature and that is cured even in wet or underwater conditions is recognized. As it is seriously emerging, it is urgent to develop a product that is insoluble in water while providing a solvent-free and antibacterial effect that does not affect the environment.

Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and its object is to repair, reinforce and reinforce concrete structures such as underwater structures-piers, sluices, dams, etc. with compounds that cure and exhibit excellent adhesion even in the presence of moisture. It is to provide a high hardness anti-corrosion coating composition that can be coated even in the adhesion, wet state.

In order to achieve the object of the present invention as described above, the high hardness anti-corrosion coating composition is a main mixture 75 composed of 77.88 to 29.42 parts by weight of a urethane-modified epoxy resin having an epoxy equivalent of 180 to 270 g / eq and 70.58 to 22.12 parts by weight of other additives. It is comprised so that -85 weight part and 15-25 weight part of polyamide-type curable resins whose amines are 280-380 KOH / g.

It is excellent in hardness, adhesive force, compressive strength, tensile strength, and water absorption within the range of 75 to 85 parts by weight of the main mixture.

On the other hand, when 85 parts by weight or more of the main mixture is added, tensile strength and adhesive strength are reduced, and when it is added below 75 parts by weight, physical properties and the like are poor, and thus the adhesiveness is not good.

When other additives of the above-mentioned main mixture are added to more or less than the range of addition, it is preferable to add them within the range since adhesiveness and hardness are reduced.

The high hardness anti-corrosion coating composition of the present invention configured above will be described in detail as follows.

The urethane-modified epoxy resin of the present invention is a resin such as bisphenol A type epoxy resin (Bisphenol A Type Epoxy), phenol novolac type epoxy resin (Bhenol Novolac Type Epoxy), brominated epoxy resin (Brominated Type Epoxy) is used. The bisphenol A epoxy resin was mainly used, and the urethane type MDI resin (Prepolymer, NCO: 2 parts by weight, SUJIN Com) which used a urethane group in the bisphenol A epoxy resin was used.

The urethane-modified epoxy resin is mixed with about 28.78 parts by weight of bisphenol A epoxy (equivalent: 220-250 g / eq) and about 1.1 parts by weight of urethane MDI (NCO: 2 parts by weight) in a fixed ratio, and then TETA 0.01 Add about 5 parts by weight and react for about 5 hours at 100-120 ° C. in the presence of nitrogen to modify the urethane-modified epoxy resin, WS-815 It is prepared by synthesis in the same manner.

77.88 to 29.42 parts by weight of the urethane-modified epoxy resin prepared as described above was mixed with the following other additives.

The urethane-modified epoxy resin is characterized by excellent hardness, adhesive force, compressive strength, tensile strength, and water absorption within the range of 77.88 to 29.42 parts by weight.

The additive mixed in the urethane resin is mixed with a silane-based binder, filler, improver, stabilizer, anti-flow agent, antibacterial agent and the like.

Among the additives, silane-based binders include amino silane (Amino Silane), epoxy silane (Epoxy Silane), chloro silane (Chloro Silane), mercapto silane (Mercapto silane) and the like. 3-Glycidoxy propyl trimethoxysilane, which is mainly an epoxy silane, was used, and the silane-based binder occupies 0.05 to 0.1 parts by weight of the resin component of the main mixture. If more than the range is added, the mixture is easily agglomerated and there is a problem of dropping the mixing power, if added below a certain range, there is a problem that the mixing power of the other additives fall.

The antimicrobial agent was added to ANBIGENT 20 (Cosmo Com.), The antimicrobial agent is characterized in that it does not contaminate the water flowing in the pipe tube, the amount of use is 0.01 to 0.1 parts by weight of the resin component of the main mixture.

When the flow inhibitor is used, such as Aerosil 200, Benton # 38, Clay Vallac Super or Texa ST (THIXOTROPIC ADDITIVE (TOTAL CO, USA), etc., the Texa ST is mainly used in the present invention, Is 0.5 to 1.5 parts by weight.

When the flow preventing agent is added in the range of 0.5 to 1.5 parts by weight or less, it easily flows down from the attachment surface during maintenance work, thereby reducing the efficiency of the work, and when it is added in the above range, it is not easily adhered to the maintenance surface. Is generated.

The stabilizer is BHT (Butylated Hydroxy Toluene), TPP (Tri Phenyl Phosphite), UV-1 and the like, used alone or in combination, the amount is 0.01 to 0.1 parts by weight.

The filler is used zirconium (Filler (Dong Yang Chem Korea)) or Zinc-Dust (Filler (Han Chang Chem Korea)), the amount of the use is 20 to 70 parts by weight of the main mixture, the antifoaming agent, Foamex-N (DEFOAMING AGENT (TEGO, GERMANY), Tego 910 (WETTING AGENT (TEGO GERMANY), TEGO 1484 (Self Leveling Agent (TEGO,)) GRMANY) and the like, or 0.1 to 0.3 parts by weight of the resin component of the main mixture.

70.58 to 22.12 parts by weight of the additives mixed as described above and 77.88 to 29.42 parts by weight of the urethane-modified epoxy resin are mixed to prepare 100 parts by weight of the main mixture.

The curable resins include polyamide-based curable resins, modified aromatic amine resins, acid anhydrides, and Jeffamines, and polyamide resins are mainly used.

The polyamide resin, which is a curable resin, is heated to 140 DEG C while stirring 37.96 parts by weight of MXDA (Meta Xylene Diamine) to about 30.92 parts by weight of phenol, and 17.11 parts by weight of 37% formaldehyde (Formaldehyde) are gradually added thereto.

37% formaldehyde was completely added as described above, and then heated to 180 ° C. for 2 to 3 hours.

When the viscosity of the resin reaches 20000 to 40000 cps / 20 ° C. based on room temperature, after the temperature is lowered to 80 ° C., 10.40 parts by weight of benzyl alcohol is added thereto, and 3.1 parts by weight of phenol is maintained while maintaining the temperature at 60 to 70 ° C. 0.5-1 parts by weight of the amine catalyst K-54, a curing accelerator, was added and stirred for about 1 hour. After completion of the reaction, WS-051 (polyamide-based curing agent (Wooshin Chem, Korea, epoxy equivalent: 220-270g) was used. / eq) 100 parts by weight is produced.

75 to 85 parts by weight of the main mixture obtained by mixing 70.58 to 22.12 parts by weight of the additive mixed as described above and 77.88 to 29.42 parts by weight of the urethane-modified epoxy resin, and 15 to 25 parts by weight of 100 parts by weight of the curable polyamide resin are mixed.

In the manufacturing process of the present invention, the urethane-modified epoxy resin WS-815 and the like is stirred 77.88 to 29.42 parts by weight using a stirrer having a rotation speed of 20 to 50rpm at a liquid temperature of 50 ± 5 ℃ for about 8 to 12 minutes.

As the other additives, 0.1 to 0.3 parts by weight of an internal physical property improving agent is added to the stirred urethane-modified epoxy resin as described above.

As a stabilizer, 0.01-0.1 weight part is added, 0.5-1.5 weight part of flow inhibitors are added, the liquid temperature is stirred at 50 +/- 5 degreeC for about 17 to 22 minutes, and a filler is added at 20-70 weight part.

Zirconium and Zinc-Dust used as the above fillers have a high specific gravity, so if a large amount is added at a time, the dispersed particles may be precipitated at the bottom of the tank. Is manufactured.

The polyamide resin, which is a curable resin mixed with the main mixture, is heated to 140 ° C while stirring 37.96 parts by weight of MXDA (Meta Xylene Diamine) to about 30.92 parts by weight of phenol, and 17.11 parts by weight of 37% formaldehyde (Formaldehyde). Slowly divide into portions.

37% formaldehyde was completely added as described above, and then heated to 180 ° C. for 2 to 3 hours.

When the viscosity of the resin is 20000 to 40000 cps / 20 ℃ based on the room temperature, after the temperature is lowered to 80 ℃ 10.40 parts by weight of benzyl alcohol, and the temperature is maintained at 60 to 70 ℃ again 3.1 weight of phenol After the reaction was terminated by adding about 0.51 parts by weight of the amine catalyst K54, which is a curing accelerator, and the reaction was completed, WS-051 (polyamide-based curing agent (Wooshin Chem, Korea. Epoxy equivalent: 220-270g) was used. / eq)) to 100 parts by weight.

The high hardness anti-corrosion coating composition is prepared by mixing 75 to 85 parts by weight of the main mixture of urethane-modified epoxy resin prepared as described above and 15 to 25 parts by weight of polyamide curable resin.

The high hardness anti-corrosion coating composition of the present invention prepared as described above is characterized by excellent hardness, adhesive strength, compressive strength, tensile strength, water absorption and the like.

In addition, the quick drying time was 2 hours, the complete curing time was 24 hours, showing a faster curing time than the conventional repair agent, the adhesion was good even in the wet state, and the appearance was good when cured. The curing time is 20 to 30 minutes (25 ° C), and the curing time is 24 hours (25 ° C), indicating a very fast curing time.

The high hardness anti-corrosion coating composition of the present invention prepared as described above will be described in more detail through the following Examples and Comparative Examples.

Example 1

The urethane modified epoxy resin WS-815 is 29.89 parts by weight, and the liquid temperature is stirred at 50 ± 5 ° C. for 10 minutes using an agitator having a rotation speed of 40 rpm.

As other additives to the stirred urethane-modified epoxy resin, 0.05 parts by weight of FOAMEX-N, 0.05 parts by weight of Tego-910, and 0.05 parts by weight of Tego-1484 were added as an internal physical property improving agent. The furnace adds 0.10 parts by weight of ANBIGENT 20.

As a stabilizer, 0.15 part by weight of TPP was added, 0.12 part by weight of 3-glycidoxy propyl trimethoxy silane (S-510 (Chisso Corporation, USA)), a silane-based binder, and 1.10 part by weight of TEXA ST, a flow inhibitor, was added. Add a weight part and stir the liquid temperature at 50 ± 5 ° C. for about 20 minutes.

Thereafter, 51.84 parts by weight of zirconium and 16.70 parts by weight of Zinc-Dust are added as a filler.

Since the filler zirconium and Zinc-Dust have a high specific gravity, the main mixture of the present invention is prepared by the process of slowly dividing and adding the mixture, since the dispersed particles may be precipitated at the bottom of the tank when a large amount is added at a time. .

The polyamide resin, which is a curable resin, was heated to 140 DEG C while stirring 37.96 parts by weight of MXDA (Meta Xylene Diamine) to about 30.92 parts by weight of phenol, and 17.11 parts by weight of 37% formaldehyde (Formaldehyde) were gradually added thereto.

37% formaldehyde was completely added as described above, and then heated to 180 ° C. for 2 to 3 hours.

When the viscosity of the resin is 20000 to 40000 cps / 20 ℃ based on the room temperature, after the temperature is lowered to 80 ℃ 10.40 parts by weight of benzyl alcohol, and the temperature is maintained at 60 to 70 ℃ again 3.1 weight of phenol After the reaction was terminated by adding about 0.51% by weight of the amine catalyst K54, which is a curing accelerator, and the reaction was completed, WS-051 (polyamide-based curing agent (Wooshin Chem, Korea. Epoxy equivalent: 220-270g) was used. / eq)) to 100 parts by weight.

A high hardness anti-corrosion coating composition is prepared by mixing 75 parts by weight of the main mixture in which the urethane-modified epoxy resin and other additives are mixed with 25 parts by weight of a polyamide-based curable resin.

As a result of experiments on the performance of the high hardness anti-corrosion coating composition prepared as described above, the hardness was 98A (SHORE A), the adhesive strength at the time of coating 28kgf / ㎠, compressive strength is 254㎏f / ㎠, tensile The strength was 96 kgf / ㎠, the absorption rate was 0.01% or less, and no effect was found even at 360hr in the salt spray state.

In addition, the fast drying time was 2 hours, the complete curing time was 24 hours, showing a faster curing time than the conventional repair agent, the adhesion is good even in the wet state, the appearance was good when cured.

Example 2

High hardness corrosion by mixing 85 parts by weight of the main mixture consisting of the same mixing ratio as in Example 1 with 15 parts by weight of polyamide-based curable resin formed by mixing 80 parts by weight of WS-051 and 20 parts by weight of the curing accelerator K-54 An anti-coat composition was prepared.

The high hardness anti-corrosion coating composition of the present Example prepared as described above was used by adding only the curing accelerator K-54 to the polyamide-based curable resin, and as a result of testing the performance of the high hardness corrosion-resistant coating composition of Example 2, The hardness was 99A (SHORE A), the adhesive strength at the time of coating was 29㎏f / ㎠, the compressive strength was 259㎏f / ㎠, the tensile strength was 115 ㎏f / ㎠, the absorption rate was less than 0.01%, and the brine The spray showed no abnormality at 360hr, which was very effective.

In addition, the fast drying time was found to be 1.5 hours, the complete curing time was 18 hours, showing a faster curing time than that performed in Example 1, not only superior to all physical properties but also very fast reactivity, wet The dry state in the state was also found to be very good.

Comparative Example 1

80 parts by weight of the main mixture having the same mixing ratio as in Example 1 was mixed with 20 parts by weight of a polyamide-based curable resin H-3038 (polyamide-based curable resin (Kukdo Chem Korea) amine number: 310-380 mg KOH / g) High hardness anti-corrosion coating compositions were prepared.

The high hardness anti-corrosion coating composition of Comparative Example 1 prepared as described above was prepared using a polyamide-based curable resin different from that used in Example 1.

Experimental results of the high hardness anti-corrosion coating composition of the present comparative example, the hardness was 86A (SHORE A), the adhesion at the time of coating 14㎏f / ㎠, compressive strength is 143㎏f / ㎠, tensile strength is 76 ㎏f / ㎠, the absorption rate was less than 0.01%, and in the salt sprayed state did not appear anything at 360hr.

In addition, the fast drying time was 4 hours, the complete curing time was 36 hours, and compared with Example 1, H-3038, a curable resin having the same composition and different amine groups, was used in the wet state. The drying condition was good, but the physical properties were lowered and the curing time was delayed.

Comparative Example 2

The urethane modified epoxy resin WS-815 is 29.89 parts by weight, and the liquid temperature is stirred at 50 ± 5 ° C. for 10 minutes using an agitator having a rotation speed of 40 rpm.

As other additives to the stirred urethane-modified epoxy resin, 0.05 parts by weight of FOAMEX-N, 0.05 parts by weight of Tego-910, and 0.05 parts by weight of Tego-1484 were added as an internal physical property improving agent. The furnace is added with 0.10 parts by weight of ANBIGENT 20.

As a stabilizer, 0.15 parts by weight of TPP was added, 0.12 parts by weight of 3-glycidoxy propyltrimethoxysilane (S-510 (Chisso Corporation, USA)), a silane-based binder, and 1.10 parts by weight of TEXA ST, a flow inhibitor, was added. Add a weight part and stir the liquid temperature at 50 ± 5 ° C. for about 20 minutes.

Thereafter, 20.84 parts by weight of silica, 31.0 parts by weight of talc, and 16.70 parts by weight of Zinc-Dust were added to prepare a 100 parts by weight of the main mixture, 85 parts by weight of the main mixture, and a polyamide curable resin WS-051. 80 parts by weight and 15 parts by weight of a curing accelerator K-54 were mixed to prepare a high hardness anti-corrosion coating composition of this Comparative Example.

As a result of experiments on the performance of the high hardness anti-corrosion coating composition prepared as described above, the hardness was 83A (SHORE A), the adhesion at the time of coating 25㎏f / ㎠, compressive strength is 232㎏f / ㎠, tensile The strength was 85 kgf / ㎠, the absorption rate was 0.05% or less, and the coating film was peeled off at 250hr in the salt spray state.

In addition, the quick drying time was 1.5 hours, and the complete curing time was 48 hours.

Silica and talc added in place of zirconium not only delayed the drying time, but also resulted in dissolution in water even when wet, resulting in a significant decrease in adhesion.

Comparative Example 3

29.89 parts by weight of KD-115CA (Kukdo Chem Korea, Epoxy equivalent: 220-270 g / eq), a bisphenol A type epoxy resin, 0.05 parts by weight of FOAMEX-N and 0.05 parts by weight of Tego-910 as an internal properties improving agent. And 0.15 parts by weight of Tego-1484 at 0.05 parts by weight, and 0.10 parts by weight of ANBIGENT 20 as an antimicrobial agent.

As a stabilizer, 0.15 parts by weight of TPP was added, 0.12 parts by weight of 3-glycidoxy propyltrimethoxysilane (S-510 (Chisso Corporation, USA)), a silane-based binder, and 1.10 parts by weight of TEXA ST, a flow inhibitor, was added. Add a weight part and stir the liquid temperature at 50 ± 5 ° C. for about 20 minutes.

Thereafter, 51.48 parts by weight of zirconium and 16.70 parts by weight of Zinc-Dust were added as a filler to prepare 100 parts by weight of the main mixture, 75 parts by weight of the main mixture, and 80 parts by weight of polyamide curable resin and WS-051. Only 25 parts by weight of the curable resin made by mixing 20 parts by weight of accelerator K-54 was mixed to prepare a high hardness corrosion resistant coating composition of the present comparative example.

As a result of experimenting with the high hardness anti-corrosion coating composition prepared as described above, the hardness was 85A (SHORE A), the adhesive strength at the time of coating 22kgf / ㎠, compressive strength is 145kgf / ㎠, tensile strength is 80 ㎏f / ㎠, the absorption rate appeared to be 0.25% or less, the coating film was peeled off at 120hr in the salt spray state.

In addition, the quick drying time was 2.2 hours, and the complete curing time was 48 hours.

Bisphenol A epoxy resin was used as the main mixed resin instead of the urethane modified epoxy resin, resulting in a decrease in physical properties, delay in curing time, adhesion loss in wet conditions, and dissolution in water.

Comparative Example 4

15.0 parts by weight of urethane modified epoxy resin WS-815 and 14.89 parts by weight of bisphenol A epoxy resin KD-115CA and other additives; 0.05 parts by weight of FOAMEX-N, 0.05 parts by weight of Tego-910, Tego- 0.148 parts by weight of 1484 is added in a total of 0.05 parts by weight, and 0.10 parts by weight of ANBIGENT 20 is added as an antimicrobial agent.

As a stabilizer, 0.15 parts by weight of TPP was added, 0.12 parts by weight of 3-glycidoxy propyltrimethoxysilane (S-510 (Chisso Corporation, USA)), a silane-based binder, and 1.10 parts by weight of TEXA ST, a flow inhibitor, was added. Add a weight part and stir the liquid temperature at 50 ± 5 ° C. for about 20 minutes.

Thereafter, 51.48 parts by weight of zirconium and 16.70 parts by weight of Zinc-Dust were added as a filler to prepare 100 parts by weight of the main mixture, and only 75 parts by weight of the main mixture were mixed as follows.

75 parts by weight of a main mixture of urethane-modified epoxy resin, bisphenol A type epoxy resin and other additives, 25 parts by weight of curable resin containing 80 parts by weight of polyamide curable resin and 20 parts by weight of curing accelerator K-54. The mixture was mixed again to prepare a high hardness anti-corrosion coating composition of this Comparative Example.

As a result of testing the performance of the high hardness anti-corrosion coating composition prepared as described above, the hardness was 85A (SHORE A), the adhesive strength at the time of coating 23㎏f / ㎠, compressive strength is 223㎏f / ㎠, tensile The strength was 75 kgf / ㎠, the absorption rate was 0.18% or less, and the coating film was peeled off at 2500hr in the salt spray state.

In addition, the quick drying time was 2.0 hours, and the complete curing time was 48 hours.

When the main mixed resin was used in combination with a urethane modified epoxy resin and bisphenol A resin, the adhesive strength in wet state was lowered than that of the urethane modified epoxy resin alone, and solubility in water and poor physical properties occurred.

Comparative Example 5

Polyamide-based curable resin 33 comprising only 67 parts by weight of the main mixture composed of the mixing ratio as in Example 1, 80 parts by weight of polyamide-based curable resin WS-051 and 20 parts by weight of curing accelerator K-54. By mixing only parts by weight to prepare a high hardness anti-corrosion coating composition.

The high hardness anti-corrosion coating composition prepared as described above was prepared by mixing only the ratio of the polyamide-based curable resin and the main mixture differently. As a result of testing the performance of the high hardness anti-corrosion coating composition of the present comparative example, the hardness is 99A (SHORE A), and the adhesive strength at the time of coating was 27㎏f / ㎠, the compressive strength was 245㎏f / ㎠, the tensile strength was 110 ㎏f / ㎠, the absorption rate was less than 0.01%, in the salt spray Nothing appeared at 360hr.

In addition, the fast drying time was 2.0 hours, and the complete curing time was 20 hours. Compared with Example 2, the comparative example was prepared in a mixing ratio of 3: 1. The physical properties and reactivity were lower than when the mixing ratio was 4: 1.

Comparative Example 6

16.66 parts by weight of a polyamide curable resin obtained by mixing only 83.33 parts by weight of a main mixture having the same mixing ratio as in Example 1 with 80 parts by weight of polyamide curable resin WS-051 and 20 parts by weight of curing accelerator K-54. Mixing alone to prepare a high hardness corrosion coating composition.

The high hardness anticorrosive coating repair agent prepared as described above was prepared only differently the ratio of the polyamide-based curable resin and the subject mixture, and the hardness of 94A (SHORE A) Adhesion at coating was 28㎏f / ㎠, compressive strength was 247㎏f / ㎠, tensile strength was 112 ㎏f / ㎠, water absorption was 0.01% or less. No abnormality appeared.

In addition, the fast drying time was 2.5 hours, the complete curing time was 24 hours, and compared with Example 2, the physical properties and reactivity of the main mixture and the curing agent when compared with 4: 1 fell.

The addition ratios and resultant values of Examples 1 and 2 and Comparative Examples 1 to 6 described above are shown in Tables 1 and 2 below.

Mixing ratio of Examples and Comparative Examples Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 (A) Topic Blend WS-815 29.89 29.89 29.89 29.89 - 15.0 29.89 29.89 KD-115CA - - - - 29.89 14.89 - - FOAMEX-N 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Tego-910 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 TPP 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 Tego-1484 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 S-510 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 THIXA ST 1.10 1.10 1.10 1.10 1.10 1.10 1.10 1.10 ZIRCONIUM 51.84 51.84 51.84 - 51.84 51.84 51.84 51.84 SILICA - - - 20.84 - - - - TALC - - - 31.0 - - - - ZINC-DUST 16.70 16.70 16.70 16.70 16.70 16.70 16.70 16.70 ANBIZENT 20 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 gun 100 100 100 100 100 100 100 100 (B) curable resin WS-051 100 80 - 80 80 80 100 100 H-3038 - - 100 - - - - - K-54 - 20 20 20 20 - - gun 100 100 100 100 100 100 100 100 Compounding ratio (topic mixture: curable resin) 4: 1 4: 1 4: 1 4: 1 4: 1 4: 1 3: 1 5: 1

Comparison of the effects of Examples and Comparative Examples Item Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Shore A 98 99 86 83 85 85 95 94 Adhesive force (Kg f / ㎠) 28 29 14 25 22 23 27 28 Compressive strength (Kg f / ㎠) 254 259 143 232 145 223 245 247 Tensile strength (hr) 96 115 76 85 80 75 110 112 Absorption rate (hr) 0.01% or less 0.01% or less 0.01% or less 0.15% 0.25% 0.18% 0.01% 0.01% Brine spray (hr) More than 360 More than 360 More than 360 250 or less 120 or less 250 or less More than 360 More than 360 Quick Drying Time (hr) 2 1.5 3 1.5 2.2 2 2 2.5 Complete Curing Time (hr) 24 18 36 48 48 48 20 24 result good Very good usually Bad Bad Bad usually usually

As described above, the high hardness corrosion coating composition prepared in Example 2 of the high hardness anticorrosive coating repair agent prepared in Examples 1 and 2 was found to be very good, and Example 1 was also shown to be similar to Example 2. As it exists, it is preferable to mix in the compounding ratio of this invention.

On the other hand, when looking at the high hardness anti-corrosion coating composition prepared by Comparative Examples 1 to 6, Comparative Example 1 has a problem that the hardness, adhesive strength, compressive strength, tensile strength, etc. significantly decreased, Comparative Example 2 has a compressive strength Except for hardness, adhesive strength and tensile strength was poor.

In addition, Comparative Example 2 and Comparative Examples 3 and 4 exhibited a phenomenon in which the composition produced when the ratio and substance mixed in the main mixture were used differently increased compared to the other, and Comparative Example 5 and Comparative Prepared in Example 6, the properties of the product are shown as normal.

According to the examples and comparative examples carried out as described above, the mixing ratio of the main mixture and the curable resin was found to be 4: 1, and the main mixture was preferably WS-815 rather than KD-115CA. Since heavy silica and talc showed poor results, it is more preferable to use zirconium and ZINC-DUST as fillers among other additives.

Therefore, the above-described high hardness anti-corrosion coating composition of the present invention prepared in the presence of moisture in the presence of moisture and excellent adhesion, repair, reinforcement and adhesion of old and new concrete structures, bridges, water gates, dams, Not only can the coating be wet, there is an easy operation.

Claims (8)

77.88 to 29.42 parts by weight of a urethane-modified epoxy resin having an epoxy equivalent of 180 to 270 g / eq and an additive consisting of a silane-based binder, a filler (zirconium or zinc dust, or a mixture thereof), an improving agent, a stabilizer, a flow inhibitor, and an antibacterial agent 70.58 to 22.12 A high hardness anti-corrosion coating composition, comprising 75 to 85 parts by weight of a main mixture comprising 15 parts by weight, and 15 to 25 parts by weight of a polyamide curable resin having an amine of 280 to 380 KOH / g. delete The high hardness anti-corrosion coating composition of claim 1, wherein the silane binder is 3-glycidoxy propyl trimethoxysilane. The high hardness anti-corrosion coating composition of claim 1, wherein the antimicrobial agent is ANBIGENT 20. The high hardness anti-corrosion coating composition of claim 1, wherein the anti-flow agent is clay ballac super or Texa ST. delete The high hardness anti-corrosion coating composition according to claim 1, wherein the polyamide cured resin is WS-051. 8. The high hardness anti-corrosion coating composition of claim 7, wherein the polyamide curable resin comprises a curing accelerator K-54.