KR100592484B1 - Polyurea resin composition for embossing-coating and a method for making embossing-coating - Google Patents

Abstract

The present invention relates to a polyurea resin composition for floor coating and a coating method thereof for improving slip resistance and reducing frictional noise. More specifically, after coating the base coat and repainted with an embossed coat to form a concave-convex (embossed) pattern on the finish surface to improve the sliding resistance performance, and to reduce the friction noise polyurea resin composition and coating using the same It is about a method. In the coating method according to the present invention, the gel time is applied to the flooring material using different polyurea resins, and the coating may be completed by using a high temperature and high pressure impact mixing spray machine.

Floor coating, Polyurea, Unevenness, Anti-slip, Painting, Paint

Description

Polyurea resin composition for embossing coating and embossing coating method {Polyurea resin composition for embossing-coating and a method for making embossing-coating}

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram of the painting (coating) appearance of the floor by an example of this invention.

Figure 2a is a photograph of the floor coating (coating) according to the present invention.

Figure 2b shows a conventional appearance (urethane, epoxy coating) of the bottom surface, the embossing is not formed on the bottom.

Figure 2c is a comparison of the appearance (right) of the embossed coating according to the present invention and the bottom surface conventional appearance (left).

3 is a view showing a painting machine used in the present invention.

3a is a photograph of GUSMER as a painting machine used in the present invention.

3b is a photograph of GUSMER's GX-7 GUN (model name; GX-7 400).

3c is a photograph of GLAS-CRAFT (model name; MX-II).

3d shows PROBLER GUN of GLAS-CRAFT.

3e is a photograph of GRACO (model name: GRACO REACTOR E-XP2).

3f is a photograph of the FUSION GUN that can be used for the GRACO.

Figure 4 is a schematic diagram showing the principle of painting according to the present invention.

The present invention relates to a polyurea resin composition capable of improving slip resistance and reducing frictional noise and a coating method using the same. More specifically, after coating the base coat containing the primer on the surface to be coated again with an embossing coat to form a concave-convex (embossed) pattern on the finish surface to improve the sliding resistance performance and reduce friction noise It relates to a composition and a coating method.

Conventionally, the surface is smoothed due to the fluidity and viscosity of the paint when the resin composition, so-called paint (painting) is applied in consideration of aesthetics to a concrete wall or floor or a building such as a steel structure or to prevent corrosion. It was common. On the other hand, the floor of a parking lot or sidewalk made of concrete or steel frame is conventionally coated with urethane. In this case, slip occurs, and in the case of a parking lot, noise is generated due to friction with car wheels. There was a problem. In order to solve this problem, a method such as spraying sand (sand) is applied to give resistance to the floor, but in this case, sand particles often leave the coating surface, so that the resistance performance is reduced. There was a problem.

Thus, there is a need for a floor paint or a coating method to allow a texture such as embossing to the bottom surface.

In order to solve the above problems, the present inventors have studied the bottom coating composition and / or the coating method which may cause a texture having irregularities such as embossing on the bottom surface.

As a result, the present inventors have found that irregularities (embossing) can be formed on the finished surface by adjusting the gel time when the base coat is coated with the embossing coat and then repainted with the embossing coat. That is, when coating (coating), the gel time of the embossing coat is shorter than that of the base coat, and when the coating for the embossing coat is cured faster, the present invention finds that a uniform uneven pattern is formed. It was completed.

Accordingly, it is an object of the present invention to provide a coating method that allows irregularities such as embossing to occur on the painted surface.

It is also an object of the present invention to provide a resin composition for painting to allow a texture such as embossing on the painted surface.

The embossing coating method according to the present invention firstly comprises a first coating step for forming a base coat and a second coating step for forming an embossing coat. Embossing (unevenness) is formed on the finishing surface by secondary coating to repaint the base coat surface to form the embossing coat.

Gel time in the basecoat coating is preferably maintained at 5 to 15 minutes, more preferably 10 minutes. In addition, in the embossed coating, the gel time is preferably 5 to 15 seconds, more preferably 10 seconds.

Gel Time refers to the time it takes for a liquid to deform into the jelly phase and not flow.

In the embodiment of the present invention, as the coating composition, a first component and a second component containing a curing agent are mixed and used, which means a time of forming a gel after mixing the first component and the two-component curing agent. It can be said.

When the gel time is increased, the coating composition may have a long time of fluidity, so that the smoothness of the base coat may be formed. If the gel time is short, the condensation of the coating composition may be accelerated, thereby making it easier to form an embossed uneven pattern.

The Gel Time can be adjusted by adjusting the Chain Extender.

In the present invention, the coating of the surface to be coated, that is, the surface of the surface to be painted first is called base coating, and the surface on which the base coating is applied is called base coat. In addition, the unevenness | corrugation with a feel of a texture, ie, an embossing, may be called an embossing coating, and the coated surface is called an embossing coat.

Preferably, the base coating may be facilitated by first coating the primer on the surface to be coated before the base coating (see FIG. 1).

The present invention also provides a resin composition for embossing coating. The resin composition for coating according to the present invention is preferably polyurea resin. Polyurea resin can be used for the composition for coating of the said 1st coating (base coating) and the 2nd coating (embossing coating).

The polyurea resin coating composition of the present invention is not particularly limited in its production method or the molecular weight of the polymer, and may be applied without limitation to the polyurea resin that can be used for coating.

The said composition for polyurea resin coating uses the polyisocyanate prepolymer as a 1st component, and makes the polyamine mixture containing a hardening | curing agent into a 2nd component (components other than a 1st component), and has the said 1st component and the 2nd component By the reaction, a polyurea resin (polyurea elastomer) is formed to allow the coating to be completed. The polyurea resin is classified into an aromatic polyurea and an aliphatic polyurea according to the kind and components of the polyisocyanate prepolymer as the first component and the polyamine mixture as the second component.

Preferably, the polyurea coating composition according to the present invention may be prepared separately from the first component and the second component, and then mixed during the coating process to react with each other. That is, the first component and the second component may be prepared in separate containers, and then the coating may be performed while adjusting to be mixed at a necessary ratio during the coating process. To this end, it is possible to adopt a spray coating method of mixing and spraying the first component and the second component.

Preferably, the polyisocyanate prepolymer as the first component has an NCO content of 10 to 20% by weight, and a viscosity of 200 to 2000 cps / 25 ° C.

Although the type of polyurea used as the coating agent in the present invention is not particularly limited, in order to form an aromatic polyurea resin, 2,4-, 4,4-Methylenediisocyanate (MDI) derivative or the polyisocyanate prepolymer as the first component or carbodimide-modified Methylenediisocyanate (MDI) derivatives. On the other hand, in order to form an aliphatic polyurea resin, the polyisocyanate prepolymer as the first component may be based on Isophorone diisocyanate (IPDI), Hexamethylene diisocyanate (HDI), or Hydrogenated MDI (H ₁₂ MDI) derivative.

In the polyurea resin coating agent according to the present invention, the polyisocyanate prepolymer as the first component is contained in an amount of 40 to 60% by weight based on the total weight of the coating composition. It is preferably contained in an amount of 45 to 55% by weight, more preferably in an amount of 50% by weight.

In this invention, components of the coating composition other than the 1st component which are the subjects are called 2nd component. The second component of the polyamine mixture includes low molecular weight Amine acting as a polyetheramine and a chain extender, and the components generally used in the coating composition, for example, Pigment, UV-Absorber, Adhesion Promoter, etc. Can be mixed. The polyamine mixture is contained in an amount of 40 to 60% by weight based on the total weight of the coating composition. It is preferably contained in an amount of 45 to 55% by weight, more preferably in an amount of 50% by weight.

In the polyamine mixture as the second component, the polyetheramine may be contained in an amount of 35 to 55% by weight based on the total weight of the polyamine mixture as the second component. It is preferably contained in an amount of 40 to 55% by weight, more preferably in an amount of 45 to 50% by weight. In addition, the amine serving as a chain extender may be contained in an amount of 10 to 35% by weight based on the total weight of the polyamine mixture as the second component. It is preferably contained in an amount of 20 to 30% by weight, more preferably in an amount of 25 to 28% by weight. Other components, such as Pigment, UV-Absorber, Adhesion Promoter, etc. may be contained in an appropriate amount as necessary.

Concerning the curing time and the Gel Time, the composition of the polyamine mixture as the second component is important. Among them, Aromatic or Aliphatic Amine compounds used as chain extenders contribute to shortening or extending Gel Time of Polyurea Elastomer. Specifically, the primary amine may shorten the Gel Time of the polyurea resin, the secondary amine may extend the Gel Time of the polyurea resin. In particular, the secondary amine obtained by reacting the polyetheramine with the maleate system contributes to extending the gel time of the polyurea resin, which is a coating composition.

In the polyamine mixture as the second component, the primary amine and the secondary amine may be used separately or at the same time, the content of which may be used as the primary amine and the secondary amine, respectively. It is good that it is the range of 15 to 35 weight% with respect to the total weight of the polyamine mixture which is a component.

The polymer of the polyetheramine contributes to the soft-block of the polyurea chain, has 2 to 2.8 Amine groups per molecule and has an equivalent of 200 to 2000 g / eq, and the content is the total weight of the polyamine mixture as the second component as described above. It is good that it is the range of 45-50 weight% with respect to.

Regarding the curing time and gel time, the ratio of the first component to the second component is also important. The preferred ratio is 1: 0.9 to 1: 1.3. If the ratio of the second component to the first component is lower than 0.9, there is a problem that the curing time is long and the embossing (unevenness) is not formed properly, and if the ratio of the second component is higher than 1.3, physical property degradation occurs.

On the other hand, the composition of the polyurea in the base coat coating and the embossed coat coating may have the same effect, but the composition of the polyurea may be different in each coating. For efficient curing in the embossing coat, the embossing coat paint can increase the content of the second polyamine mixture.

First, for the base coat coating, the polyisocyanate prepolymer as the first component is contained in an amount of 40 to 60% by weight based on the total weight of the coating agent, and the polyamine mixture as the second component is 40 to 60% by weight based on the total weight of the coating agent. It can be contained in an amount of. In addition, in the polyamine mixture (second component) for base coating, the polyetheramine may be contained in an amount of 35 to 55% by weight based on the total weight of the polyamine mixture, and the amine serving as a chain extender is added to the total weight of the polyamine mixture. It may be contained in an amount of 15 to 35% by weight relative to the amount. In this case, the primary amine and the secondary amine may be mixed and used. In this case, the ratio of the primary amine and the secondary amine is preferably 1: 3.

For coating the embossing coat, the polyisocyanate prepolymer as the first component is contained in an amount of 40 to 60 wt% based on the total weight of the coating agent, and the polyamine mixture as the second component is 40 to 60 wt% based on the total weight of the coating agent. It can be contained in an amount. In the polyamine mixture (second component) for embossing coating, the polyetheramine can be contained in an amount of 50 to 65% by weight based on the total weight of the polyamine mixture, and the amine serving as the chain extender is based on the total weight of the polyamine mixture. It may be contained in an amount of 20 to 40% by weight. In this case, the ratio of the primary amine and the secondary amine is preferably 2: 1.

Embossing coating method using the polyurea-based coating composition according to the present invention can be formed by mixing and spraying a polyisocyanate prepolymer of one component and a polyamine of two components under high temperature, high pressure. Preferably, it is preferable to spray and spray the coating method, and more preferably, it is easy to coat the equipment with a dedicated Polyurea spray for the spray.

Mixing coatings can be easily carried out using commercially available spray equipment. For example, as shown in Figure 4, by applying a pressure over a certain pressure (2000psi) through the two nozzles one component and two components can be mixed in a mixing collision in the mixing chamber of the spray gun to cause a polymerization reaction. have.

When painting, base coat is applied first. For coating the base coat, a mixture of the first polyisocyanate prepolymer and the second polyamine mixture is sprayed under high temperature and high pressure. In particular, the coating may be applied while spraying, in which case, the first polyisocyanate prepolymer and the second polyamine mixture are sprayed immediately after mixing and coating is performed.

When applying the base coat, the pressure of the mixing injector is preferably maintained at 1300-2800 psi. More preferably, it is good to maintain at 1800 ~ 2200psi. If the pressure is lower than 1300psi, there is a problem of physical properties due to poor mixing, and if the pressure is higher than 2800psi, there is a problem in obtaining a smooth surface, so as to adjust the pressure as described above.

On the other hand, it is preferable to maintain the temperature of the mixing injector at 50 ~ 80 ℃ when applying the base coat. More preferably, it is good to maintain at 65-70 degreeC. If the temperature is lower than 50 ℃, there is a problem of poor mixing, because if the temperature is higher than 80 ℃ has a problem in obtaining a smooth surface due to the high reactivity.

It is better to coat the primer on the base surface to be coated first for coating the base coat. The reason for coating the primer is that the bottom surface is not clean, so pinholes may occur, so that the bottom is smoothed, and the main purpose is to improve the adhesion of the coating agent. In the case of the polyurea resin coating agent, the primer coating may be performed using a brush, a roller, or a spray by using "SuperTech 100" as a dedicated primer. After coating the primer, it is preferably left for about 3 hours and then coated with a base coat. On the other hand, in the case of concrete, such as the uneven portion or a severe bombo (holes, grooves), such as severe, it is possible to adjust the bottom surface using a floor adjuster before the primer coating.

After coating the base coat, leave the coated surface for at least 1 hour. Preferably, it is appropriate to leave for 1 to 2 hours. The thickness of the base coating may vary depending on the purpose of the coating. In consideration of the embossing coating that follows, the thickness of the coating is preferably 2 mm or more.

After the base coat coating is embossed coat coating. Spray the paint again on the base coat where the flat painted surface is created so that the embossed surface with irregularities is formed. When spraying the coating composition to form the embossed surface, the sprayed liquid stays in the air for a long time, the sprayed liquid is condensed to some extent during the stay, and then adheres to the base coating surface to quickly harden to form an embossed surface with irregularities. Be sure to

For this purpose, the air residence time of the coating agent for embossing is preferably 1 to 3 seconds. If the time is less than 1 second, there is a problem in forming the uneven pattern, because if the time is longer than 3 seconds there is a problem with the base coat and adhesion. Preferably, the residence time is preferably adjusted to 1.5 to 2.5 seconds, and more preferably, the residence time is adjusted to 1.5 to 2 seconds. The residence time may vary depending on the nature of the coating composition.

When applying the embossed coat, the pressure of the mixing injector is preferably maintained at 1300-2800 psi. More preferably, it is good to maintain at 1800 ~ 2200psi. If the pressure is lower than 1300psi, there is a problem of physical property degradation due to poor mixing, and if the pressure is higher than 2800psi, there is a problem in forming a uniform uneven pattern, so as to adjust the pressure as described above.

On the other hand, when applying the embossed coat coating, the temperature of the mixing injector is preferably maintained at 50 ~ 80 ℃. More preferably, it is good to maintain at 65-70 degreeC. If the temperature is lower than 50 ℃, there is a problem of poor mixing, if the temperature is higher than 80 ℃ because the reactivity is faster, there is a problem in forming a uniform uneven pattern adjust the temperature as described above. After embossing, the coating is left for at least 1 hour. Preferably, it is appropriate to leave for at least 5 hours.

The polyurea resin coating (coating) applied according to the present invention can be used in various applications such as waterproofing, anticorrosion, flooring, etc., due to excellent physical properties, thermal stability, abrasion resistance, and the like.

Existing urethane and epoxy paints must be mixed and mixed well with the main agent and curing agent in two-component type. In particular, it may cause hardening defects depending on the working method, and the drying time also takes more than 24 hours. However, in the case of the polyurea elastomer used in the present invention, the curing time is short, and in particular, the curing time can be adjusted according to the use, so when using a spray-only machine, construction efficiency such as shortening of air (drying within 1 to 2 hours) and labor cost reduction It can be maximized, but also has the characteristics of superior physical properties than the existing urethane paint.

Hereinafter, the present invention will be described in more detail with reference to test examples, preparation examples, and examples. However, the present invention is not limited in scope by these examples or test examples.

<Test Examples 1 to 4> Comparison of Properties by Chain Extender

In this test example, the physical properties of the polyurea coating according to the chain extender were compared. The composition is shown in Table 1 below.

Specifically, 2,4-, 4,4-Methylenediisocyanate (MDI) having a NCO content of 15.0 wt% and having a viscosity distributed in the range of 200 to 2000 cps / 25 ° C as a polyisocyanate prepolymer as a first component of the polyurea resin ( Lupranate MI ^™ ; manufactured by BASF Corporation).

Polyetheramine was used as the second component of the polyamine mixture, JEFFAMINE ^TM (HUNTSMAN, USA). In the chain extender, Ethacure ^TM 100 (Albemarle) was used as the primary amine and Polylink ^TM was used as the secondary amine. 4004 (The Hanson Group LLC) was used. That is, JEFFAMINE ^TM D-2000 and JEFFAMINE ^TM T-5000 were mixed and used as the polyetheramine, and ETHACURE 100 (Albermarle, USA) and PolyLink 4004 (The Hanson Group, USA) were used as chain extenders.

Polyetheramine polymers contribute to Soft-Block of Polyurea chain, and have 2 ~ 2.8 Amine groups per molecule and 200 ~ 2000g / eq equivalent. The used content was 40-70 wt%.

The secondary amine chain extender is a low molecular weight equivalent to less than 200g / eq contributes to the hard-block and reaction rate of the Polyurea chain. Therefore, the secondary extender Amine, which is a chain extender, should be used properly. The amount used in this test was 20 to 30% by weight. On the other hand, the secondary Amine system [Composite 1: (JEFFAMINE D-2000 1000 weight / Dibutylmaleate 230 weight), Compound 2: (JEFFAMINE D-230 115 weight / Dibutylmaleate 230 weight)] that reacted Polyetheramine and Maleate as a compound is Plyurea It contributes to the soft block of the chain and the reaction rate, and the amount used is 20 to 30% by weight.

After preparing a polyurea coating agent according to the composition according to Table 1, it was coated on the concrete wall. The equipment used for painting was GUSMER H-20 / 35, temperature 68 ° C. pressure 2000 psi. The GUN used was GX-7 400. Tensile strength, tear strength, and elongation were measured according to the commonly used ASTM test method. The component content unit is g.

The results are shown in Table 1 below.

division Test Example 1 Test Example 2 Test Example 3 Test Example 4 Remarks First ingredient MDI-Prepolymer NCO: 15.0% 1000 1000 1000 1000 Second component (polyamine mixture) JEFFAMINE ^TM D-2000 622 591 542 497 JEFFAMINE ^TM T-5000 56 51 52 53 Composite 1 25 25 25 25 Composite 2 10 10 10 10 ETHACURE ^TM 100 287 242 185 128 PolyLink ^TM 4004 0 81 186 297 Mixing ratio [1st component (Iso): 2nd component (Amine)] = 1: 1 (volume ratio) Physical properties Gel Time (sec) 4 5.5 7 12 Tensile strength (psi) 2490 2660 2130 2700 ASTM D638 Tear strength (pli) 505 480 460 430 ASTM D624 Elongation (%) 467 530 530 620 ASTM D638 Hardness (shore D) 43 42 37 38 ASTM D2240

As can be seen from the table, it can be seen that the use of PolyLink 4004 extends the gel time than the use of Ethacure 100. That is, as a result of comparing the physical properties according to the chain extender, by increasing a certain amount of polylink 4004, which is a secondary amine, than the primary amine Ethacure 100, reactivity extension and physical properties can be improved.

<Test Examples 5 to 9> Comparison of physical properties according to the mixing ratio of the polyisocyanate prepolymer and the polyamine mixture

In this test example, the physical properties of the polyisocyanate prepolymer and the polyamine mixture were compared. The composition of the polyisocyanate prepolymer and polyamine mixture is shown in Table 2 below. Other conditions and methods are the same as in Test Examples 1-4.

division Test Example 5 Test Example 6 Test Example 7 Test Example 8 Test Example 9 Remarks First ingredient MDI-Prepolymer NCO: 15.0% 1000 1000 1000 1000 1000 Second Component (Polyamine Mixture) JEFFAMINE ^TM D-2000 525 556 480 579 593 JEFFAMINE ^TM T-5000 82 87 90 92 94 ETHACURE 100 275 235 215 203 185 PolyLink 4004 90 94 96 98 100 Composite 1 20 20 20 20 20 Composite 2 8 8 8 8 8 Mixing ratio [1st component (Iso): 2nd component (Amine)] = 1: 1 (volume ratio) Equivalence Ratio Reaction Index (Iso / Amine) 0.9 One 1.05 1.1 1.15 Physical properties Gel Time (sec) 5 6 6.5 6 6.5 Tensile strength (psi) 1130 2100 2490 2660 2630 ASTM D638 Tear strength (pli) 330 440 470 470 460 ASTM D624 Elongation (%) 130 440 490 560 630 ASTM D638 Hardness (shore D) 38 41 41 38 40 ASTM D2240

As can be seen in the table, it can be seen that the polyisocyanate prepolymer and the polyamine mixture change in reactivity and physical properties according to the equivalence ratio reaction index (Isocyanate / Amine). The theoretical reaction index shows relatively good physical properties when 1.0 or isocyanate excess index, and the applicable index range is preferably 1.05 to 1.30, more preferably 1.05 to 1.20.

<Test Examples 10-13> Comparison of Physical Properties According to NCO Content

Polyisocyanate prepolymers have different reactivity and chemical and physical properties depending on the type of isocyanate used. 4-MDI Base is excellent. On the other hand, when using IPDI or HDI which is Aliphatic Isocyanate, the reaction rate is much slower than using 2,4-, 4,4-MDI.

In this regard, Test Examples 10-13 were conducted to determine how NCO% affects the reaction rate and physical properties. Prototypes with different NCO contents were used by increasing the 2,4-4,4-MDI content. (Lupranate MI ^TM series; BASF Corporation)

The composition of the polyisocyanate prepolymer and polyamine mixture is shown in Table 3 below. Other conditions and methods are the same as in Test Examples 1-4.

division Test Example 10 Test Example 11 12 on the test Test Example 13 Remarks First ingredient NCO% of MDI-Prepolymer 10.5 13 15 20 Second Component (Polyamine Mixture) JEFFAMINE ^TM D-2000 681 620 555 315 JEFFAMINE ^TM T-5000 98 98 98 92 JEFFAMINE ^TM D-400 0 0 0 200 Composite 1 20 20 20 20 Composite 2 8 8 8 8 ETHACURE 100 93 152 213 215 PolyLink 4004 100 102 106 150 Mixing ratio [1st component (Iso): 2nd component (Amine)] = 1: 1 (volume ratio) Physical properties Gel Time (sec) 20 8 5.5 3.5 Tensile strength (psi) 1150 2520 2660 2770 ASTM D638 Tear strength (pli) 220 330 480 541 ASTM D624 Elongation (%) 1060 1010 530 270 ASTM D638 Longitude A50 A70 D42 D52 ASTM D2240

In general, hardness depends on the density of Urea bonds, and the higher the NCO%, the higher the Urea Density Index (UDI).

The reaction rate depends on the amount of NCO% and secondary Amine and the content of secondary Amine system reacted with Polyetheramine and Maleate. The lower the NCO%, the slower the reaction rate, and the higher the NCO%, the faster the reaction rate. Other physical properties such as tensile strength and tear strength. The elongation rate is also affected by NCO%.

Production Examples 1 to 5 Preparation of Polyurea for Base Coat

1. Preparation of Polyisocyanate Prepolymer

Mix Isophorondiisocyanate (IPDI) by 46% by weight (46kg) and JEFFAMINE D-2000 by 54% by weight (54kg), and hold it for 4 hours at the reaction temperature of 80 ~ 90 ℃ to 100kg of polyisocyanate prepolymer with 15% NCO%. Prepared.

2. Preparation of Polyamine Mixtures

The polyamine mixture was uniformly prepared by adding a polyetheramine having an average molecular weight of 2000, a polyetheramine having an average molecular weight of 5000, a polyetheramine and a maleate-based secondary amine chain extender, a UV stabilizer and a pigment. The composition is shown in Table 4. In Table 4, Compound 1 was synthesized by mixing 23 parts by weight of dibutylmaleate with 100 parts by weight of JEFFAMINE D-2000, and Compound 2 was synthesized by mixing 200 parts by weight of dibutylmaleate with 100 parts by weight of JEFFAMINE D-230. In Table 4, the content unit of each component is kg.

In order to measure the physical properties of the prepared polyurea coating composition for basecoat, the composition was coated on a concrete floor, and then the physical properties were measured according to the ASTM test method.

[How to paint]

Painting machine: GusmerH-20 / 35, hose temperature: 68 ℃, pressure: 2000psi

Use: GX-7 400

Property measurement method: measured according to ASTM test method

division Preparation Example 1 Preparation Example 2 Preparation Example 3 Preparation Example 4 Preparation Example 5 JEFFAMINE D-2000 38.7 48.7 34.7 41.7 43.7 JEFFAMINE T-5000 10 5 - - - Composite 1 - - 24 15 20 PolyLink 4002 10 18 10 - - Unilink 4200 20 10 30 20 25 Ethacure 100 - - - 12 10 Composite 2 20 17 - 10 - Tinuvin 328 0.3 0.3 0.3 0.3 0.3 TiO ₂ One One One One One Physical properties Gel Time (minutes) 5 6 25 11 17 Tensile strength (psi) 1620 1770 1330 1940 1870 ASTM D638 Tear strength (pli) 255 270 240 285 275 ASTM D624 Elongation (%) 540 321 410 432 405 ASTM D638 Shore A Type 95 91 89 93 94 ASTM D2240

Production Examples 6 to 9 Preparation of Polyurea for Embossing Coat

1. Preparation of Polyisocyanate Prepolymer

2,4-, 4,4-Methylenediisocyanate (MDI) derivative (product name: Lupanate MI, manufacturer: BASF) was mixed with 53 wt% (53kg) and 47 wt% (47kg) of polypropylene glycol having an average molecular weight of 2000. 100 kg of a polyisocyanate prepolymer having an NCO% of 15% was prepared by maintaining at 80 to 90 ° C for 4 hours.

2. Preparation of Polyamine Mixtures

The polyamine mixture was uniformly prepared by adding a polyetheramine having an average molecular weight of 2000, a polyetheramine having an average molecular weight of 5000, a polyetheramine and a maleate-based secondary amine chain extender, a UV stabilizer and a pigment. The composition is shown in Table 5. In Table 5, Compound 2 is the same as in Preparation Examples 1 to 5, and the content unit of each component is kg. Measurement of physical properties is also the same as in Production Examples 1 to 5.

division Preparation Example 6 Preparation Example 7 Preparation Example 8 Preparation Example 9 Remarks JEFFAMINE D-2000 61 45 47 50 JEFFAMINE T-5000 5 18 18 18 Unilink 4200 8 8 - 11 Ethacure 100 19 21 23 21 Composite 2 7 8 12 - Tinuvin 328 0.3 0.3 0.3 0.3 TiO ₂ One One One One Gel Time (seconds) 8 7 6 7 Physical properties Tensile strength (psi) 2690 2852 2455 2234 ASTM D638 Tear strength (pli) 425 431 403 375 ASTM D624 Elongation (%) 355 348 366 432 ASTM D638 Shore A Type 95 96 92 93 ASTM D2240

<Examples 1-20>

The bottom surface of the concrete was coated by combining the polyurea for the base coat and the polyurea for the embossed coat, respectively, prepared in the preparation example.

The coating method is as follows.

1. Base coat

First, the concrete floor was cleaned. The moisture content of the concrete floor was less than 8%.

After the bottom was cleaned, the bottom surface was primer-coated using SuperTech 100 (Samhwa Paint), a primer exclusively for polyurea as a primer.

3 hours after the primer coating, each basecoat polyurea prepared in Preparation Examples 1 to 5 was sprayed onto each of four (20 locations in total) concrete floor surfaces having an area of 25 m ² .

The equipment used for painting was the GUSMER H-20 / 35, and the GUN used was the GX-7 400.

[Spray condition]

-Spray hose temperature: 60 ~ 70 ℃

Spray pressure

Static pressure: 136 ~ 170 kgf / ㎠

Discharge Pressure: 122 ~ 164 kgf / ㎠

Air pressure: 8 ~ 10 kgf / ㎠

Coating thickness: 2 mm

-Compounding ratio: 1st ingredient (topic): 2nd ingredient (curing agent) = 1: 1 (volume ratio)

Spraying the base coat Polyurea elastomer prepared according to the present invention under the above conditions to complete a uniform surface state.

2. Embossing Coat

The 20 base coats sprayed using each of the basecoat polyureas prepared in Preparation Examples 1 to 5 were coated with the polyurea for embossing coats prepared in Preparation Examples 6 to 9. That is, the embossing coat of each manufacture example 6-9 was applied to the polyurea application | coating area | region of manufacture example 1, respectively. Similarly, the polyurea of manufacture examples 2-5 was similarly applied, and it was set as Examples 5-20. The equipment used for painting was the GUSMER H-20 / 35, and the GUN used was the GX-7 400.

-Spray condition

Spray hose temperature: 60 ~ 70 ℃

Spray pressure

Static pressure: 136 ~ 170 kgf / ㎠

 Discharge Pressure: 122 ~ 164 kgf / ㎠

 Air pressure: 8 ~ 10 kgf / ㎠

Coating thickness: 1 mm on average

-Spray Gun: Polyurea Spray Gun

-Compounding ratio: 1 component (topic): 2 components (curing agent) = 1: 1 (volume ratio)

The embossed coat Polyurea elastomer prepared according to the present invention was spray-sprayed on the base coat under the above conditions to complete the uneven pattern. At this time, the spray gun was sprayed while maintaining the height of about 1m from the ground and maintaining an angle of about 45 ° to produce a uniform uneven pattern. The airtime of the polyurea for embossing coating was in the range of 1.5 to 2 seconds.

Comparative Example

For comparison, in the case of the coating by the conventional polyurethane coating and epoxy coating and the coating according to the present invention, frictional force and noise were compared, respectively.

Polyurethane coating was applied to the thickness of 3mm by hand using a trowel, and epoxy coating was applied to the thickness of 3mm by hand using a trowel.

Friction force was measured by ASTM E303 method, and friction noise was measured by tire friction noise generated by steering wheel left and right after stopping the vehicle.

The results are shown in Table 6 below.

division Friction noise Remarks Polyurethane 11 72-75 dB Epoxy 9 72-75 dB Example 1 (production example 1 + production example 6) 26 10-19 dB Example 2 (Manufacture Example 1 + Production Example 7) 27 14-18 dB Example 3 (Manufacture example 1 + manufacture example 8) 22 17-21 dB Example 4 (Manufacturing Example 1 + Manufacturing Example 9) 23 9-15 dB Example 5 (production example 2 + production example 6) 27 11-17 dB Example 6 (Manufacturing Example 2 + Manufacturing Example 7) 29 8-13 dB Example 7 (Manufacturing Example 2 + Manufacturing Example 8) 23 13-20dB Example 8 (Manufacturing Example 3 + Manufacturing Example 9) 21 10-18 dB Example 9 (Manufacturing Example 3 + Manufacturing Example 6) 27 11-17 dB Example 10 (Manufacturing Example 3 + Manufacturing Example 7) 31 6 ~ 11dB Example 11 (Manufacturing Example 3 + Manufacturing Example 8) 24 9-17 dB Example 12 (Manufacturing Example 3 + Manufacturing Example 9) 23 8-20 dB Example 13 (Manufacturing Example 4 + Manufacturing Example 6) 26 12-19 dB Example 14 (Manufacturing Example 4 + Manufacturing Example 7) 28 15 to 24 dB Example 15 (Manufacturing Example 4 + Manufacturing Example 8) 25 13-20dB Example 16 (Manufacturing Example 4 + Manufacturing Example 9) 23 12-19 dB Example 17 (Manufacturing Example 5 + Manufacturing Example 6) 25 10-18 dB Example 18 (Manufacturing Example 5 + Manufacturing Example 7) 28 10-21 dB Example 19 (Manufacturing Example 5 + Manufacturing Example 8) 22 9-19 dB Example 20 (Manufacturing Example 5 + Manufacturing Example 9) 21 11-20 dB

Also shown in Figures 2a, 2b and 2c are photographs showing the results of the coating. Figure 2a is a photograph of the bottom coating (coating) according to the present invention, Figure 2b shows a conventional appearance of painting (urethane, epoxy coating), the embossing is not formed on the bottom. Figure 2c is a comparison of the appearance (right) of the embossed coating according to the present invention and the bottom surface conventional appearance (left).

The present invention relates to a coating method of a coating agent to have an embossed surface having irregularities and a polyurea resin coating agent for forming an embossing, and the coating agent according to the present invention is waterproof due to excellent physical properties, thermal stability, abrasion resistance, and the like. It can be used for various purposes such as, anticorrosion, flooring. In addition, unlike conventional urethane or epoxy paints, the curing time is short and the curing time can be adjusted according to the application. While it can maximize the sliding resistance performance and reduce friction noise, it has the characteristics of superior physical properties than the existing urethane paint.

Claims (10)

In the embossing coating method using a polyurea resin composition, Forming a base coat by coating a surface to be coated (skin surface) with a composition for coating a base coat; And The embossing coat is applied to the base coat by controlling the gel time of the embossing coat coating composition, which is shorter than the gel time of the base coat coating composition, to 5 to 15 seconds and by spraying the air so that the air stay time is 1 to 3 seconds. Forming a embossed surface with irregularities by allowing the composition for curing to form a particle on the base coat surface; Embossing coating method using a polyurea resin composition comprising a. delete delete delete According to claim 1, wherein the basecoat coating composition and the embossing coat coating composition, respectively, Polyisocyanate prepolymers as subject first agents; And A second agent which is a curing agent and comprises a polyamine mixture, The polyamine compound includes polyetheramine and low molecular weight Amine, The low molecular weight Amine embossed coating method using a polyurea resin composition, characterized in that it comprises a primary amine: secondary amine in a mixing ratio of 1: 3 or 2: 1. The method of claim 5, wherein the first agent and the second agent are each stored in a separate container, embossed coating method using a polyurea resin composition, characterized in that the mixing during the spraying process. 6. The method of claim 5, wherein the polyisocyanate prepolymer is 2,4-, 4,4-Methylenediisocyanate (MDI), carbodimide-modified Methylenediisocyanate (MDI) or derivatives thereof. delete delete 40 to 60 wt% of a polyisocyanate prepolymer as the first agent, which is the main agent; And A second agent as a curing agent, comprising 40 to 60% by weight of a polyamine mixture, The polyisocyanate prepolymer has an NCO content of 10 to 20% by weight, The polyamine mixture includes polyetheramine and low molecular weight Amine, The low molecular weight Amine is a polyurea resin composition for embossing coating with irregularities, characterized in that it comprises a primary amine: secondary amine in a mixing ratio of 1: 3 or 2: 1.

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