JP2014080458A - Two-liquid curing type coating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-liquid curing type coating material in which a main agent liquid and a curing agent liquid can be retained in a mixed state.SOLUTION: The inside of a spray vessel 5 provided with an injection nozzle 6 is sealed with a main agent liquid 1 and a curing agent liquid 2 in a mixed state, and further, a gas 4 for injection for injecting the mixed liquid 3 of the main agent liquid 1 and the curing agent liquid 2 from the injection nozzle 6 to the outside of the vessel is sealed in the vessel 5. In this way, the two-liquid curing type coating material in which the mixed main agent liquid and curing agent liquid can be preserved over a long period, feedable to use as it is, and further capable of easily forming a sound coating film even without performing a complicated operation can be provided.

Description

  The present invention relates to a two-component curable coating material comprising a main agent solution and a curing agent solution.

  Two-component curable paints can be mixed with a main agent solution and a curing agent solution to cause a curing reaction (chemical reaction), and a tough coating film can be formed by the curing reaction. Therefore, civil engineering structures such as buildings, bridges, automobiles, etc. Widely used for painting where water resistance, weather resistance and durability are required.

  As shown in Patent Documents 1 and 2 below, the conventional two-component curable coating is to keep the main agent solution and the curing agent solution in a non-contact state in order to suppress the curing reaction, and mix both solutions immediately before use. It is assumed that it will be used.

For example, the main agent liquid and the curing agent liquid are separately stored in two containers, and both liquids are mixed and used for use immediately before use. The two types of liquid are isolated and stored inside the spray container provided), and the two means are mixed for use by releasing the isolation means from the outside of the container and shaking the container.
A plurality of companies provide spray containers (for example, trade name “Air Urethane” Isamu Paint Co., Ltd .: 8-2-1 Kasayama, Kusatsu City, Shiga Prefecture) that spray and paint a two-component curable paint based on the same idea.

Japanese Patent No. 4118969 JP 2010-189480 A Japanese Patent No. 4412605

  However, when storing the main agent solution and the curing agent solution in separate containers, an appropriate amount of each liquid is taken out from each container, and a complicated work process of mixing while looking at the ratio of each liquid occurs. There is a problem that a desired coating film cannot be obtained due to errors or poor mixing.

  In addition, when the main agent liquid and the curing agent liquid are stored in a single container (spray container) via an isolating means, even if the mixing ratio error or mixing failure can be reduced, the container Isolation means and isolation release means must be provided, and there is a problem that the structure of the container becomes complicated and becomes very expensive.

  In any of the above cases, the main agent liquid and the curing agent liquid are isolated and held in a container to prevent curing before use, and the main agent liquid and the curing agent liquid are mixed at the time of use to promote curing. .

  Thus, conventionally, it has been indispensable to keep the main agent solution and the curing agent solution in the container separately before use. The same applies to the above-mentioned Patent Document 3 in which the two-component curable coating material is sprayed by a spray container having a spray nozzle.

  Therefore, the inventor has eagerly studied whether a two-component curable coating material that maintains the main agent liquid and the curing agent liquid in a mixed state can be realized, particularly in the spray container. The liquid mixture is hardened by sealing the liquid mixture in a mixed state and sealing the injection gas for injecting the liquid mixture of the main agent liquid and the curing agent liquid from the injection nozzle to the outside of the container. Thus, a two-component curable paint that can be kept in a usable state has been conceived.

  In addition, the inventor uses silane as the main agent liquid, uses polyisocyanate as the curing agent liquid, finds that the curing reaction proceeds by the chemical change of the silane and the polyisocyanate by reacting with moisture (water in the air), The inventors have come up with a two-component curable coating that can be stored and used for a long period of time by sealing the mixed solution of the main agent solution and the curing agent solution together with the spray gas in the spray container. The same effect can be obtained by using a main agent solution or / and a curing agent solution containing components having the same effect as the silane and the polyisocyanate.

  According to the two-component curable coating composition according to the present invention, the mixed main agent solution and curable agent solution can be stored for a long period of time, and can be used as they are. A film can be formed.

1 is a cross-sectional view schematically showing a two-component curable paint according to the present invention.

  An embodiment of the present invention will be described below with reference to FIG.

  As shown in FIG. 1, the two-component curable paint according to the present invention seals the main agent liquid 1 and the hardener liquid 2 in a mixed state in a spray container 5 having an injection nozzle 6, and also cures the main agent liquid 1 and the hardening agent. An injection gas 4 for injecting the liquid mixture 3 of the chemical liquid 2 from the injection nozzle 6 to the outside of the container is sealed in the container 5.

  That is, the mixed liquid 3 is sealed in the spray container 5, and the jetting gas 4 is sealed above the mixed liquid 3, and the peripheral wall 5 a and bottom 5 b of the spray container 5 and the jetting gas 4 are used. The injection gas 4 pressurizes the liquid mixture 3 while the liquid mixture 3 is securely sealed, so that the liquid mixture 3 can be injected from the injection nozzle 6.

  Further, 8 in FIG. 1 is a tube material for transferring the mixed liquid 3 to the spray nozzle 6, and its lower end is disposed at the deepest part of the bottom 5 b of the spray container 5. Further, reference numeral 7 in FIG. 1 denotes a backflow prevention valve for blocking outside air that has entered from the injection nozzle 6, thereby preventing air from entering the spray container 5. 1 in FIG. 1 is a ceramic or iron stirring ball.

  As described above, the inventor uses silane as the main agent liquid 1, uses polyisocyanate as the curing agent liquid 2, and the silane and the polyisocyanate react with moisture (water in the air) and chemically change to cause a curing reaction. The liquid mixture 3 of the main agent liquid 1 and the hardener liquid 2 is sealed in the spray container 5 together with the jetting gas 4 and a two-part curable paint that can be stored and used for a long time is conceived. It came to. The same effect can be obtained by using the main agent liquid 1 and / or the curing agent liquid 2 containing components having the same effect as the silane and the polyisocyanate.

  In this embodiment, alkylalkoxysilane is used as the silane of the main agent liquid 1, and polyisocyanate is used as the curing agent liquid 2.

  As shown in the following chemical formula 1, the alkylalkoxysilane in the main liquid 1 reacts with moisture in the air to produce silanol and ethyl alcohol.

  Further, the polyisocyanate in the curing agent liquid 2 reacts with moisture in the air to generate polyurea and carbon dioxide as shown in the following chemical formula 2.

  The silanol produced by modifying the alkylalkoxysilane in the main agent liquid 1 shown in the chemical formula 1 and the polyurea produced by modifying the polyisocyanate in the curing agent liquid 2 shown in the chemical formula 2 undergo a curing reaction. Form a coating film. In addition, since the ethyl alcohol shown in the chemical formula 1 is volatilized and the carbon dioxide gas shown in the chemical formula 2 is diffused during spray coating, it does not contribute to the formation of the coating film.

  As described above, the two-component curable paint according to the present invention seals the main agent liquid 1 and the hardener liquid 2 in a mixed state in the spray container 5 and also mixes the main agent liquid 1 and the hardener liquid 2. The jetting gas 4 is arranged at the upper part of 3, and the mixed liquid 3 is pressurized with the jetting gas 4, and both are sealed in the spray container 5.

  Thereby, reaction with the component in the main ingredient liquid 1 in the liquid mixture 3 and / or the component in the hardening agent liquid 2 and moisture in the air is suppressed, and long-term storage and use are possible.

  In the two-component curable coating composition according to the present invention, the main agent liquid 1 and the hardener liquid 2 are mixed at a weight ratio of 1 to 9: 1 to 9, preferably, the weight ratio of the main agent liquid 1 and the hardener liquid 2. Is set to 3: 7 to form a coating film having an appropriate hardness. In addition, when coloring, a pigment is mix | blended suitably.

  When injecting the liquid mixture 3 into the spray container 5, the liquid mixture 3 is injected while the injection gas 4 is filled in the container 5 in advance, or the liquid mixture 3 is injected into the spray container 5. Immediately after that, the injection gas 4 is injected while venting the air in the container 5, and the mixture 3 and the injection gas 4 are sealed in the container 5. The same applies when the main agent liquid 1 and the curing agent liquid 2 are separately injected into the spray container 5.

  The spray container 5 includes the spray nozzle 6 and the backflow prevention valve 7, and the shape and material (such as steel) are not particularly limited as long as the liquid or gas can be sealed.

  A gas such as a known liquefied petroleum gas is used as the injection gas 4 sealed in the spray container 5. Preferably, nitrogen gas, butane gas or dimethyl ether gas is used, and the inside of the spray container 5 is sealed safely and easily. Further, it is preferable to use a gas liquefied by applying pressure as the injection gas 4.

  When the injection gas 4 is liquefied, since the specific gravity of the liquefied injection gas 4 is smaller than the specific gravity of the mixed liquid 3, the liquefied injection gas 4 is, as shown in FIG. In the spray container 5, it is arranged above the mixed solution 3. When the jetting gas 4 remains a gas, the jetting gas 4 is disposed above the mixed solution 3 in the spray container 5 by gas-liquid separation, as shown in FIG. In any case, the injection gas 4 presses the liquid surface of the mixed liquid 3 in the spray container 5 to prepare for the injection of the liquid, while cooperating with the peripheral wall portion 5a and the bottom portion 5b of the spray container 5. 3 is securely sealed.

  At the time of spray coating, the mixed liquid 3 pressed by the spraying gas 4 is discharged in a mist form from the spray nozzle 6 through the tube material 8 and efficiently contacts moisture in the air to start a curing reaction. The liquid mixture 3 'that has started the curing reaction adheres to the surface to be coated and forms a sound coating film. That is, coating can be performed by spraying the properly mixed main agent liquid 1 and curing agent liquid 2 (mixed liquid 3), and the curing reaction can be efficiently started at the time of injection.

  As described above, the two-component curable paint according to the present invention seals the mixed liquid 3 of the main agent liquid 1 and the curable agent liquid 2 in the spray container 5 including the injection nozzle 6, and is used for injection above the mixed liquid 3. By sealing the gas 4, the curing reaction can be effectively prevented and stored for a long period of time, and the gas can be used for a long period of time. In use, the mixed liquid 3 is sprayed from the spray nozzle 6 and used. It can be spray painted while promoting efficient curing.

  Next, a method for producing a mixed liquid of the main agent liquid and the curing agent liquid will be described. As described above, the inventor mixes the main agent liquid and the curing agent liquid, and then cures after the components of the main agent liquid or the curing agent liquid, or both the main agent liquid and the curing agent liquid react with moisture in the air and change chemically. We found that the reaction started. Therefore, the mixed liquid of the main agent liquid and the curing agent liquid is generated by the method shown below.

  That is, first, using a known stirrer such as a homogenizer, a proper amount of curing agent liquid is put into the stirrer vessel of the stirrer together with the main agent liquid.

  As described above, at the same time or immediately after the main agent liquid and the curing agent liquid are put into the stirring vessel, the stirring vessel is sealed by a sealing means and the remaining space is filled with nitrogen gas, and the stirring vessel with a stirring blade is used. The main liquid and the curing liquid are stirred to mix the two liquids to obtain a mixed liquid.

  In other words, the main agent liquid and the curing agent liquid placed in the stirring vessel are stirred without being exposed to air with nitrogen gas, and both liquids are mixed to obtain a mixed liquid. The mixed liquid thus obtained is extracted from the stirring container of the agitator by a known extracting means such as a transfer pipe member, and injected into the spray container 5 shown in FIG. 1 and sealed.

  Alternatively, the main agent liquid and the curing agent liquid are separately injected into the spray container 5 and several stirring balls 9 are arranged in the container 5, and the main agent liquid and the curing agent liquid in the spray container 5 are dispersed by the stirring balls 9. A mixed solution can be obtained by stirring.

  In addition, in this invention, if it can stir without touching air (moisture in air), it will not restrict to the said stirring method. Any method may be used as long as the injection into the spray container can be performed without touching air (water in the air).

  Further, the present inventor has confirmed by the following method that the curing reaction of the main agent liquid and the curing agent liquid sealed in a mixed state in the spray container as described above does not start for a long time.

  Seal the mixed liquid of the main agent liquid composed of alkylalkoxysilane and the curing agent liquid composed of polyisocyanate in the spray container described above, seal the injection gas in the container, and put the stirring ball in the container. A sample was prepared, and when the agitating ball was moved by shaking the spray container, the sound emitted from the agitating ball colliding with the inner wall (circumferential wall or bottom wall) of the spray container was confirmed.

  That is, it was confirmed that the curing reaction did not start in the mixed solution when the sound by the stirring ball was generated, and the curing reaction started in the mixed solution when the sound was not generated.

  When the presence or absence of the above-mentioned sound was confirmed at a fixed time every day, it was found that the liquid mixture was prepared by mixing the main agent liquid composed of the alkylalkoxysilane and the curing agent liquid composed of the polyisocyanate at a ratio of 2: 8 by weight. In the case of a mixed solution in which the main agent solution and the same curing agent solution are mixed at a weight ratio of 3: 7 for about 90 days, the generation of the above sound can be confirmed for about 100 days. Was confirmed to be stably stored without initiating the curing reaction. In addition, it was also confirmed that the liquid mixture was sprayed onto the surface to be coated to form a healthy coating film.

  As described above, the two-component curable paint according to the present invention seals the main agent liquid and the hardener liquid in a mixed state in a spray container provided with an injection nozzle, and injects the mixed main agent liquid and the hardener liquid above the mixed state. By sealing the working gas, the properly mixed main agent liquid and curing agent liquid can be stored for a long period of time and can be used for a long period of time.

  In addition, the two-component curable coating material according to the present invention has a function of firmly adhering to a surface to be coated to form a coating film, and can be used as an adhesive using the adhesion function.

DESCRIPTION OF SYMBOLS 1 ... Main agent liquid, 2 ... Curing agent liquid, 3 ... Mixed liquid of main agent liquid and hardening | curing agent liquid, 3 '... Mixed liquid which started hardening reaction, 4 ... Gas for injection, 5 ... Spray container, 6 ... Injection nozzle, 7 ... Backflow prevention valve, 8 ... Tube material, 9 ... Stirring ball.

Claims (2)

  The main agent liquid and the curing agent liquid are sealed in a mixed state in a spray container having an injection nozzle, and an injection gas for injecting the mixed liquid of the main agent liquid and the curing agent liquid from the injection nozzle to the outside of the container is contained in the container. A two-component curable paint that is sealed inside.   2. The two-component curable paint according to claim 1, wherein the main agent liquid is composed of silane, and the curing agent liquid is composed of polyisocyanate.

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