JP2017221888A - Two-pack primer injection equipment - Google Patents

Abstract

Provided is a two-component primer jetting apparatus capable of reducing the burden on an operator when a two-component primer for improving fixability of polyurea is applied.
A two-component primer jetting apparatus 1 applies a two-component primer that improves the fixability of polyurea. The two-component primer injection device 1 includes a first container 2, a second container 3, and a spray gun 10. The first container 2 is filled with a material obtained by adding a propellant to the main component of the two-component primer. The second container 3 is filled with a material obtained by adding a propellant to a curing agent of a two-component primer. The spray gun 10 mixes and discharges the contents of the first container 2 and the contents of the second container 3. [Selection] FIG.

Description

  Embodiments described herein relate generally to a two-part primer injection device.

  When reinforcing a concrete structure or the like by covering with polyurea, a primer (undercoat paint) may be applied to improve the fixability of polyurea. A two-component primer is generally used for polyurea undercoating (for example, Patent Document 1 and Patent Document 2). The two-component primer is mixed with the main agent and the curing agent, which have been stirred in advance, and then applied to the surface of the substrate with a predetermined film thickness using a brush or a roller.

  The two-component primer must complete the construction within a pot life (pot life) that does not harden, and the construction work cannot be interrupted. Since the two liquids cannot be mixed and prepared before the construction, the time and labor for stirring the main agent and the curing agent and the time for sufficiently mixing the two liquids are required for each construction. Furthermore, it takes time and effort to apply with a brush or a roller. In addition to the above, there are various items that require improvement in the construction of the two-component primer.

JP 2008-75033 A JP 2004-218352 A

  An object of the present invention is to provide a two-component primer injection device that can reduce the burden on the operator when constructing a two-component primer for polyurea.

  In one embodiment, the two-component primer jetting apparatus applies a two-component primer that improves the fixability of polyurea. The two-component primer injection device includes a first container, a second container, and a spray gun. The first container is filled with a material obtained by adding a propellant to the base material of the primer. The second container is filled with a material obtained by adding a propellant to the primer curing agent. The spray gun mixes and discharges the contents of the first container and the contents of the second container.

  According to the two-part primer injection device of one embodiment, an operator's burden can be reduced.

It is a perspective view which shows the two-component primer injection apparatus of 1st Embodiment. It is a top view which shows the two-component primer injection apparatus of 2nd Embodiment. It is sectional drawing which shows the principal part of the two-component primer injection apparatus of 3rd Embodiment.

[First Embodiment]
The two-component primer injection device of the first embodiment will be described with reference to FIG. FIG. 1 is a perspective view showing a two-component primer injection device 1. The two-component primer injection apparatus 1 applies a two-component primer that improves the fixability of polyurea.

  An example of a two-component primer for polyurea is a two-component epoxy polyamine primer that reacts an epoxy with a polyamine. The two-component primer according to the present embodiment may be a two-component epoxy polyamide primer that reacts an epoxy and a polyamide, as long as it is a two-component primer that reacts with a main agent and a curing agent and cures at room temperature. Alternatively, a two-component urethane prepolymer that reacts isocyanate and polyol may be used.

As shown in FIG. 1, the two-component primer injection device 1 includes a first container 2, a second container 3, and a spray gun 10.
The 1st container 2 is a disposable spray can, for example, Comprising: The valve | bulb 4 which can be opened and closed is provided. The first container 2 is filled with a material obtained by adding a propellant to the main component (agent A) of the two-component primer. An example of the main agent is a mixture containing glycidyl ether and a phenolic compound. If it is a glycidyl ether having an epoxy group at the terminal, it can be cured more smoothly at room temperature than cyclohexene oxide having an epoxy group inside. Examples of glycidyl ether include 2-ethylhexyl glycidyl ether.

  The phenolic compound is copolymerized with glycidyl ether to form a primer coating. An example of the phenolic compound is bisphenol A. A fine inorganic filler such as silica crystal may be added to the main agent in order to suppress repelling (coating defects) and form a primer coating uniformly.

  As the propellant, a liquefied gas propellant or a compressed gas propellant can be used. Examples of the liquefied gas propellant include liquefied gas propellants such as dimethyl ether (DME) and liquefied petroleum gas (LPG). Examples of the compressed gas propellant include compressed carbon dioxide gas and nitrogen gas. In this embodiment, a liquefied gas-based propellant is suitable. Since the liquefied gas propellant is in a liquid phase in the can, it contributes to a decrease in the viscosity of the contents. Further, liquefied gas-based propellants vaporize when injected into the atmosphere and have a volume that is 200 to 300 times larger. Therefore, the contents can be dispersed into very fine particles.

  The 2nd container 3 is a disposable spray can, for example, Comprising: The valve | bulb 5 which can be opened and closed is provided. The second container 3 is filled with a material obtained by adding the same propellant as that of the first container 2 to the two-component primer curing agent (B agent). An example of the curing agent is a mixture containing an aliphatic polyamine. If it is an aliphatic polyamine, reaction with an epoxy resin is quick, and a main ingredient can be hardened at normal temperature. Furthermore, since the main agent cured with an aliphatic polyamine is tough and excellent in adhesiveness, it can be suitably used for polyurea undercoating. On the other hand, when the main agent is cured with an aliphatic polyamine, the pot life is not long. As will be described in detail later, according to the two-component primer injection device 1 of the present embodiment, the two-component primer can be applied regardless of the pot life.

  Examples of the aliphatic polyamine include benzene 1,3-dimethanamine. The pot life of the two-component primer obtained by reacting 2-ethylhexyl glycidyl ether and bisphenol A with benzene 1,3-dimethanamine is, for example, 60 to 90 minutes. The pot life may be shorter. In order to suppress repellency, a fine inorganic filler such as silica crystal may be added to the curing agent. In order to reduce the viscosity of the primer, a solvent such as benzyl alcohol may be further contained. If the propellant is in a liquid phase in the can, it contributes to a decrease in the viscosity of the contents, so that the amount of this solvent can be reduced.

The spray gun 10 includes a holder 11, a first tube 12, a second tube 13, a trigger 14, and a nozzle 15.
The holder 11 is mounted with the first container 2 and the second container 3 with the valves 4 and 5 facing upward. The holder 11 includes a fixing unit 16 that fixes the first container 2 and the second container 3, and an operation unit 17 that opens and closes the first container 2 and the second container 3.

The operation unit 17 includes, for example, a lift plate 18 that faces the valves 4 and 5 from above, and a height adjustment screw 19 that adjusts the distance between the lift plate 18 and the fixed portion 16. When the elevating plate 18 is lowered and the valves 4 and 5 are pressed, the valves 4 and 5 are opened.
One end of the first tube 12 is connected to the valve 4 of the first container 2. The other end of the first tube 12 is connected to a valve 20 built in the spray gun 10. Similarly, the second tube 13 has one end connected to the valve 5 of the second container 3 and the other end connected to the valve 20. The trigger 14 is attached to the grip 21 of the spray gun 10 and operates opening and closing of the valve 20.

  The nozzle 15 is connected to the valve 20. The nozzle 15 is detachably fixed to the valve 20. The nozzle 15 mixes and discharges the contents of the first container 2 sent through the first tube 12 and the contents of the second container 3 sent through the second tube 13.

  An example of the nozzle 15 is a disposable static mixer. Inside the static mixer, alternately arranged left elements 15A (shown in FIG. 3) and right elements 15B (shown in FIG. 3) are arranged in series. The left element 15A divides the fluid passing through the inside of the static mixer in two and rotates it to the left. The right element 15B divides the fluid passing through the inside of the static mixer into two parts and rotates it to the right. The main agent and the curing agent passing through the inside of the static mixer are agitated and mixed by the elements 15A and 15B whose rotation directions are alternately switched and discharged from the tip.

  When the valve 14 is opened by operating the trigger 14 in the two-component primer injection device 1 of the present embodiment, the main component of the two-component primer through the first tube 12 due to the pressure of the propellant filled in the first container 2. Is fed into the nozzle 15. The curing agent of the two-component primer is fed into the nozzle 15 through the second tube 13 by the pressure of the propellant filled in the second device 3. The main agent and the curing agent sent to the nozzle 15 with the pressure of the propellant are stirred and mixed while passing through the nozzle 15 and are injected from the tip of the nozzle 15. While the valve 20 is opened, new main agent and curing agent are supplied from the first container 2 and the second container 3 to the nozzle 15 as much as the material is used.

  When the trigger 14 is operated and the valve 20 is closed, the supply of the main agent and the curing agent to the nozzle 15 is stopped. The main agent and the curing agent are stirred and mixed by the nozzle 15 on the downstream side of the valve 20. That is, the main agent and the curing agent are not mixed with each other on the upstream side of the valve 20 or the valve 20. The main agent remaining in the first container 2 and the first tube 12 is not mixed with the curing agent. The curing agent remaining in the second container 3 and the second tube 13 is not mixed with the main agent. The main agent and the curing agent inside the nozzle 15 that has already been mixed can be removed together with the disposable nozzle 15.

According to the two-component primer injection apparatus 1 of the present embodiment configured as described above, the main component and the curing agent of the two-component primer are supplied to the nozzle 15 as much as the material is used. The supplied main agent and curing agent are used promptly after mixing.
Therefore, a two-component primer can be applied regardless of pot life. A long pot life curing agent is difficult to cure at room temperature, and requires heating and a long curing time. According to this embodiment, a short pot life does not become a disadvantage. An aliphatic amine or the like having higher reactivity than an aromatic amine or aliphatic amide is used as a curing agent, and the main agent can be quickly cured at room temperature. Therefore, the construction period can be shortened. Can be constructed even in winter. A tough primer coating can be formed. Further, in the case of a combination of a main agent and a curing agent having different specific gravities, there is a possibility that the dispersion state of the two liquids will change over time after stirring. According to this embodiment, since the material is used without time after stirring, it is possible to save the trouble of maintaining the dispersed state of the two liquids.

  In the present embodiment, the supply of the main agent and the curing agent can be stopped by operating the trigger 14. Since the remaining main agent and curing agent are stored in a state where they are not mixed with each other, the mixed material is not wasted and wasted. Therefore, it can cope with small-scale construction. Work can be interrupted at any time. The burden on the operator can be reduced.

  For example, when applying a two-component primer with a brush or a roller, the main agent and the curing agent must first be stirred. In contrast, this embodiment uses a liquefied gas propellant such as dimethyl ether as the propellant. The main agent and the curing agent injected with the liquefied gas propellant are dispersed in very fine particles. Even if it is not agitated in advance, the main agent sprayed from the first container 2 is dispersed as if agitated. The curing agent sprayed from the second container 3 is also dispersed as if stirring. Thereby, the effort which stirs each of a main ingredient and a hardening agent can be reduced. Moreover, since the liquefied gas propellant is in the liquid phase in the can, the amount of the solvent for adjusting the viscosity of the contents can be reduced.

  In the present embodiment, the contents are filled in a spray can. By simply shaking the spray can, the operator can uniformly disperse the main agent (curing agent) and liquefied gas, which are the contents, and reduce the viscosity of the contents.

  In the construction of the two-component primer, it is impossible to prepare a mixture of the main agent and the curing agent before construction. It is necessary to mix the two liquids thoroughly every time construction is performed. The present embodiment includes a nozzle 15 that mixes the main agent and the curing agent. According to this embodiment, since the main agent and the curing agent are mixed by the nozzle 15 by the pressure of the propellant filled in the first container 2 and the second container 3, it is not necessary to mix the two liquids. Further, since the material can be ejected from the tip of the nozzle 15, no brushes or rollers are required. Thereby, an operator's burden can be reduced.

  If the nozzle 15 is a disposable static mixer, the main agent and the curing agent can be sufficiently mixed. In addition, the main nozzle and the curing agent inside the nozzle 15 can be easily removed by replacing the nozzle 15 after use.

  Then, 2nd Embodiment and 3rd Embodiment are described. The second embodiment and the third embodiment differ from the first embodiment in that a third container is provided. Other configurations are the same as those in the first embodiment. Therefore, in 2nd Embodiment and 3rd Embodiment, the same referential mark is attached | subjected about the structure same as 1st Embodiment, and the description is abbreviate | omitted.

[Second Embodiment]
A second embodiment will be described with reference to FIG. As shown in FIG. 2, the two-component primer injection device 1 of the second embodiment further includes a third container 30 and a third tube 31 connected to the third container 30.
The 3rd container 30 is a disposable spray can, for example, Comprising: The valve | bulb 32 which can be opened and closed is provided. The third container 30 is filled with a propellant. As the propellant, a compressed gas propellant or a liquefied gas propellant can be used. For the second embodiment, a compressed gas propellant is suitable. The internal pressure of the container filled with the compressed gas propellant is, for example, 3 to 5 atm at room temperature. The internal pressure of the container filled with the liquefied gas propellant is, for example, 2 to 4 atmospheres at room temperature. When a compressed gas propellant is used, the inside of the can of the third container 30 can be easily adjusted to a higher pressure than a liquefied gas propellant.

  The first end 33 of the third tube 31 is connected to the valve 32 of the third container 30. The second end 34 of the third tube 31 is connected to the valve 20 of the spray gun 10. In the nozzle 15 connected to the valve 20, the contents of the first container 2, the contents of the second container 3, and the propellant of the third container 30 are mixed. The nozzle 15 is an example of a merging unit that merges the contents of the first to third containers 2, 3, and 30.

  According to the second embodiment, in addition to the propellant filled in the first container 2 and the second container 3, mixing and jetting of the two-component primer can be assisted by the propellant filled in the third container 30. The first container 2 and the second container 3 are filled with a liquefied gas propellant, the third container 30 is filled with a compressed gas propellant, and the pressure in the can of the third container 30 is changed to the first container 2. And it can adjust so that it may become higher than the pressure in the can of the 2nd container 3. When the pressure of a liquefied gas-based propellant such as dimethyl ether is insufficient, the two-component primer can be more smoothly injected by the internal pressure of the third container 30 higher than that of the first container 2 and the second container 3.

[Third Embodiment]
A third embodiment will be described with reference to FIG. The third embodiment is a modification of the second embodiment shown in FIG. The second end 34 of the third tube 31 is connected to the nozzle tip 35 attached to the tip of the nozzle 15 instead of the valve 20.

The propellant filled in the third container 30 is sent through the third tube 31 to the nozzle tip 35 attached to the tip of the nozzle 15. The contents of the first tube 2 and the contents of the second container 3 are mixed while passing through the nozzle 15 and discharged from the tip of the nozzle 15. The material injected from the tip of the nozzle 15 merges with the propellant in the third container 30 at the nozzle tip 35 and is injected with increased momentum. The nozzle tip 35 is an example of a merging unit that merges the contents of the first to third containers 2, 3, and 30.
According to the two-component primer injection device 1 of the third embodiment, the mixing and injection of the two-component primer can be smoothly assisted by the propellant filled in the third container 30 as in the second embodiment.

  The present invention can be implemented by adding various modifications to the configurations of the embodiments described above. For example, the configurations disclosed in the embodiments may be combined as appropriate. The forms modified without departing from the gist of the invention are included in the invention described in the claims and the equivalents thereof.

  For example, in the spray gun shown in FIG. 1, the holder may be configured in a box shape that accommodates the first container and the second container. In that case, the first container and the second container can be heated by pouring warm water into the box-shaped holder. Thereby, vaporization of a propellant can be promoted and the internal pressure of a container can be raised.

  Alternatively, when the first container and the second container are not large, a grip and a trigger may be provided on the holder to form an integrated structure. In this configuration, compared with the spray gun shown in FIG. 1 in which the holder, the grip, and the trigger are divided, the lengths of the first tube and the second tube are reduced, so that the pressure loss is reduced. Moreover, since the apparatus is downsized, handling is improved during work.

  DESCRIPTION OF SYMBOLS 1 ... Two-component primer injection apparatus, 2 ... 1st container, 3 ... 2nd container, 10 ... Spray gun, 30 ... 3rd container, 31 ... 3rd tube.

Claims (6)

A two-component primer jetting device that applies a two-component primer that improves the fixability of polyurea,
A first container filled with a material obtained by adding a propellant to the main component of the two-component primer;
A second container filled with a material obtained by adding a propellant to the curing agent of the two-component primer;
A spray gun for mixing and discharging the contents of the first container and the contents of the second container;
A two-component primer injection device comprising: A two-component primer jetting device that applies a two-component primer that improves the fixability of polyurea,
A first tube connected to a first container filled with a material obtained by adding a propellant to the main component of the two-component primer;
A second tube connected to a second container filled with a material obtained by adding a propellant to the curing agent of the two-component primer;
A spray gun for mixing and discharging the contents of the first container sent through the first tube and the contents of the second container sent through the second tube;
A two-component primer injection device comprising: The two-component primer is a two-component epoxy polyamine primer,
The main agent contains glycidyl ether and a phenolic compound,
The two-component primer injection device according to claim 1, wherein the curing agent contains an aliphatic polyamine.   4. The two-component primer injection device according to claim 1, further comprising a static mixer that mixes and discharges the contents of the first container and the contents of the second container. 5. A third container filled with a different type of propellant from the first container and the second container;
A third tube for joining the propellant of the third container to the contents of the first container and the contents of the second container;
Further comprising
5. The two-component primer according to claim 1, wherein the pressure in the can of the third container is higher than the pressure in the can of the first container and the second container. Injection device.   6. The first container and the second container are filled with a liquefied gas propellant, and the third container is filled with a compressed gas propellant. Two-part primer injection device.

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