JP2008248111A - Two-pack reaction curing type composition and bonding method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method causing no spew from a bonding margin, capable of uniformly coating an adhesive and low in cost, in coating of a two-part curing type composition. <P>SOLUTION: The two-part reaction curing type composition is provided, wherein the two parts are each held in the space in a vessel which is composed of a porous material having pores communicating the inside with the outside of the vessel and a wall comprising one or more selected from the group consisting of a resin, glass, wood and a metal, and a bonding method using the composition is provided. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a two-component reaction curable composition typified by a two-component reaction curable adhesive, which is separately stored in a specific container space. Hereinafter, the case of a two-component reaction curable adhesive which is a representative example of the two-component reaction curable composition will be described as an example.

Conventionally, as a two-component reaction curable adhesive application device, two cylinder-shaped cartridges each containing two components of a two-component reaction curable adhesive, a grip portion, a lever portion, and a piston shape at the tip, respectively. Using an extrusion device with two extrusion rods with two extrusion rods, a nozzle connected to the tip of the cartridge is provided, and two cartridges are attached to the extrusion device with the two extrusion rods pulled back In addition, it is known that by holding the grip part and pulling the lever part, the push rod is advanced step by step, and the adhesive in each cartridge is pushed to the nozzle part by the push part and discharged. (See Patent Document 1).

Japanese Utility Model Laid-Open No. 5-080563

However, in the case of an extrusion device for extruding an adhesive from the cartridge and a coating device using the same, a two-component reaction curing type adhesive stored in a dedicated cartridge is manufactured separately or is generally marketed as a tube. It is necessary to refill and use a two-component reaction curable adhesive in a dedicated cartridge.

When the two-part reaction curable adhesive is separately manufactured and used, the cartridge part that functions as a cylinder must be disposable, and the nozzle part is usually a two-part reaction curable type. In order to mix the adhesive uniformly, there is a problem that the cost is increased because an expensive static mixer is incorporated.

Also, when applying the adhesive, hold the grip part and pull the lever part to discharge the adhesive in the cartridge from the nozzle, but it is difficult to finely control the force to pull the lever part. In addition, it is difficult to evenly apply the adhesive discharged from the nozzle to the adhesive margin, and there is also a problem that protrusion from the adhesive margin is likely to occur.

The present invention has been made in view of the above-described problems of the prior art, and in the application of a two-component reaction curable adhesive (two-component reaction curable composition), the adhesive does not protrude from the bonding margin and is uniformly applied. An object is to improve the coating workability by allowing the coating to be performed, and at the same time to eliminate the disposable part of the cartridge and to further reduce the cost without using a static mixer.

The present invention is a two-component reaction curable composition, wherein each of the two components is selected from the group consisting of a porous material having pores communicating with the inside and outside of the container, and a resin, glass, wood, and metal. A two-component reaction curable composition characterized in that the two-component reaction curable composition is housed in a container internal space composed of a wall made of

Furthermore, in the present invention, one liquid of the two-component reaction curable composition contained in the inner space of the container is applied to one adherend surface, and the other liquid of the two-component reaction curable composition is applied to the other It is an adhesion method characterized in that the adherends are adhered to each other by applying to adherend surfaces and joining the application surfaces together.

Since the two-component reaction curable composition of the present invention employs the above-described configuration, a disposable cartridge or a static mixer is not used, so that it is economical and cost reduction can be achieved.

Since the specific two-component reaction curable composition is used in the bonding method of the present invention, the two-component reaction curable composition can be applied uniformly and with a thin coating thickness, and there is no wasteful protrusion after bonding. Since it does not occur, the wiping work can be omitted and the bonding work time can be shortened.

The container used in the present invention is a container composed of a porous material having pores communicating with the inside and outside of the container, and a wall made of one or more selected from the group consisting of resin, glass, wood, and metal.

The porous material having pores communicating with the inside and outside of the container may be a non-woven fabric, a sponge-like porous material, or a mesh as long as it can pass the adhesive liquid, but a mesh is preferably used. The material of the porous material is not particularly limited as long as it is not dissolved or deteriorated by an adhesive, but nylon, polyurethane, etc. are preferably used, and a nylon mesh and a polyethylene screen are stored in a polypropylene screen holder. Since it is easy to obtain, it is more preferable.

The wall of the container is not particularly limited as long as the material is not dissolved or deteriorated by the adhesive, and is selected from one or more selected from the group consisting of resin, glass, wood, and metal. Examples of the resin include polyethylene, polypropylene, polytetrafluoroethylene, the glass includes borosilicate glass, and the metal includes stainless steel. Of the resin, glass, wood, and metal, the resin is preferably used, and polyethylene, polypropylene, and the like are particularly preferable because they are flexible.

A cross-sectional view of an example of the container used in the present invention is illustrated in FIG.
In FIG. 1, reference numeral 1 denotes a main body of a container for storing a liquid adhesive (one liquid of a two-component reaction curable adhesive) 2, and 3 is a mesh as a discharge portion provided on the upper portion of the main body 1. In the present invention, for the two-component reaction curable composition, each of the two components is selected from one or more selected from the group consisting of a porous material having pores communicating with the inside and outside of the container, and resin, glass, wood, and metal. The effect of the present invention is obtained by storing in a container internal space constituted by a wall. Although not shown in the figure, a portion of the porous material outside the container is usually provided with a lid so that the liquid inside does not leak.

Examples of the two-component reaction curable composition include a two-component caulking material, a sealing material, and a paint in addition to a typical two-component reaction curable adhesive.

Specific examples of the two-component reaction curable composition include, for example, a polymerization reaction curable composition such as an acrylic composition, an unsaturated polyester composition, a vinyl ester composition, an epoxy composition, and a urethane composition. Can be mentioned. Among these, an acrylic composition is preferable in that high adhesive strength can be obtained even if the two liquids are not sufficiently joined.

Either a primer type or a two-component main agent type can be used, but a two-component main agent-type acrylic composition has a high adhesive strength if two types of main agents (A agent and B agent having similar compositions) come into contact with each other to some extent. Therefore, a two-component main component acrylic composition is more preferably used.

A preferred acrylic composition includes a redox catalyst curing composition containing a polymerization initiator.

The redox catalyst curing composition is usually divided into a first agent containing a polymerization initiator and an acrylic monomer, and a second agent containing a polymerization accelerator and an acrylic monomer, and the first agent and the second agent are separated. To be stored.

As acrylic monomers of the acrylic composition, (meth) acrylic acid, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 2-hydroxyethyl (meth) Acrylate, 2-hydroxypropyl (meth) acrylate, dicyclopentenyloxyalkyl (meth) acrylate, polyethylene glycol (meth) acrylate, polypropylene glycol (meth) acrylate, dimethylaminoethyl (meth) acrylate, polyethylene glycol di (meth) acrylate 1,4-butanediol (meth) acrylate, epoxy (meth) acrylate, trimethylolpropane tri (meth) acrylate and terminal (meth) acryl-modified liquid polyb Diene, and the like. These can be used alone or in combination of two or more.

In the acrylic composition, an acrylic monomer and another radical polymerizable monomer can be used in combination, but the other monomer used here is not particularly limited, and monofunctional such as styrene, acrylonitrile, vinyl acetate and acrylamide. Monomers and polyfunctional monomers such as divinylbenzene, triallyl cyanurate and triallyl isocyanurate can be used alone or in combination of two or more.

As the polymerization initiator for the acrylic composition, a peroxide or an azo compound used as a radical polymerization initiator is preferably used, but the type of the peroxide or azo compound is not particularly limited, and for example, a peroxide is used. Examples include organic peroxides such as cumene hydroperoxide, methyl ethyl ketone peroxide and benzoyl peroxide, and inorganic peroxides such as potassium persulfate and ammonium persulfate, and azo compounds include azobisisobutyronitrile. Etc. Among these, organic peroxides are preferable from the viewpoint of curability.

The polymerization accelerator is a compound that accelerates the decomposition of the polymerization initiator. Examples of the polymerization accelerator include thiourea derivatives such as diethylthiourea, amines such as N, N-diethyl-p-toluidine, cobalt naphthenate and octylic acid. Examples include organic acid metal salts such as cobalt, and organic metal chelate compounds such as copper acetylacetonate, and these can be used alone or in combination of two or more.

In the present invention, 2 accommodated in a container internal space composed of a porous material having pores communicating with the inside and outside of the container and one or more walls selected from the group consisting of resin, glass, wood, and metal. One liquid of the liquid curable composition is applied to the surface of one adherend, and similarly, the other liquid of the two liquid curable composition stored in the internal space of the container having the above configuration is applied to the other adherend. It is preferable to adhere | attach adherends mutually by apply | coating to a body surface and joining application surfaces.

The above-mentioned adhesive bonding method is generally called honeymoon adhesion, but the two-component main component type acrylic composition can be mixed with the two main components if the two main components (A and B agents with similar compositions) come into contact to some extent. Therefore, it is suitable for honeymoon adhesion, and from this point, the two-component main component type acrylic composition is preferably used in this invention.

According to the present invention, the liquid of the two-component curable composition is applied to the adherend surface through a porous material having pores communicating with the inside and outside of the container, so that the composition is uniform and the coating thickness is reduced. Therefore, useless protrusion does not occur after the application surfaces are joined to each other, the wiping work of the composition can be omitted, and the working time can be shortened.

In addition, according to the present invention, by using a honeymoon adhesive bonding without using a disposable cartridge, high adhesive strength can be imparted without using a static mixer, and costs can be reduced.

In the present invention, if the two liquids of the two liquid reaction curable composition have a viscosity in the range of 5 to 100,000 mPa · s at a temperature of 25 ° C., the porous liquid has pores that allow the liquid of the composition to communicate with the inside and outside of the container. Since discharge from the material is very stable, it can be applied very uniformly to the surface of the adherend, which is preferable. In particular, when the viscosity is in the range of 1000 to 50000 mPa · s at a temperature of 25 ° C., the surface of the adherend is more stably discharged from the porous material having pores communicating with the inside and outside of the container. It is even more preferable that it can be applied more uniformly.

(Example 1) Using a commercially available two-component main agent type acrylic adhesive (manufactured by Denki Kagaku Kogyo Co., Ltd., "G-55-03"), two main agents (A agent and B agent having similar compositions; temperature 25) Viscosity at 3000 ° C. for agent A and 3000 mPa · s for agent B) Container having discharge section (mesh portion has a diameter of 1.2 cm) (see FIG. 1). ) Separately put into two pieces.

Next, for the aluminum frame (thickness 1 mm) with a size of 25 x 40 cm and a hole of 15 x 30 cm inside, bond the mesh part of the container containing the main agent A with a width of 1.2 cm from the inside. The base agent A was applied for one round in contact with the surface.

On the other hand, with respect to a polycarbonate plate (thickness: 1 mm) having a size of 17.4 × 32.4 cm, the mesh part of the container containing the main agent B is brought into contact with the surface of the adhesive margin having a width of 1.2 cm from the outside. The B agent was applied for one round.

Immediately after coating, the coated surfaces of the aluminum frame and the polycarbonate plate were bonded together and bonded together. As a result, the adhesive could be stuck without protruding and the wiping work for the protruding portion could be omitted. It took only 30 seconds of work time from the start of application to pasting.

(Example 2) A commercially available two-component main component acrylic adhesive having a viscosity of 10000 mPa · s for agent A and 10000 mPa · s for agent B at a temperature of 25 ° C. (manufactured by Denki Kagaku Kogyo Co., Ltd., “G-55-10”) ) Was used in the same manner as in Example 1 except that. As a result, the adhesive could be stuck without protruding and the wiping work for the protruding portion could be omitted. It took only 30 seconds of work time from the start of application to pasting.

(Example 3) Commercially available two-component main component acrylic adhesive (G-55-05, manufactured by Denki Kagaku Kogyo Co., Ltd.) having a viscosity of 5000 mPa · s for agent A and 5000 mPa · s for agent B at a temperature of 25 ° C. ) Was used in the same manner as in Example 1 except that. As a result, the adhesive could be stuck without protruding and the wiping work for the protruding portion could be omitted. It took only 30 seconds of work time from the start of application to pasting.

(Example 4) A commercially available two-component main component acrylic adhesive having a viscosity of 20000 mPa · s for agent A and 20000 mPa · s for agent B at a temperature of 25 ° C. (manufactured by Denki Kagaku Kogyo Co., Ltd., “C-355-20”) ) Was used in the same manner as in Example 1 except that. As a result, the adhesive could be stuck without protruding and the wiping work for the protruding portion could be omitted. It took only 30 seconds of work time from the start of application to pasting.

(Comparative Example 1) Using a “new manual gun type 1” set made by Denki Kagaku Kogyo Co., Ltd., which is a cartridge type and a manual lever type applicator equipped with a static mixer at the tip of the nozzle, the same two commercially available solutions as in Example 1 Using main agent type acrylic adhesive (manufactured by Denki Kagaku Kogyo Co., Ltd., “G-55-03”), two types of main agents (agent A and agent B having similar compositions) were separately packed in a cartridge. The adhesive liquid in which two liquid main ingredients were mixed by applying a static mixer was applied to the surface of the bonding margin of 1.2 cm in width of the aluminum frame used in 1 for one round. Immediately thereafter, the surface portion of the polycarbonate plate having a width of 1.2 cm and the surface portion of the adhesive plate coated with the adhesive liquid of the aluminum frame were bonded together and bonded together. I let you. As a result, the adhesive liquid protruded from the bonded portion, and it took 30 seconds to wipe the protruding portion. Eventually, it took 60 seconds to complete the pasting and wiping from the start of application.

According to the present invention, since the adhesive composition can be applied uniformly and with a thin application thickness, no wasteful protrusion occurs after the application surfaces are joined together, and the wiping work of the composition can be omitted. Therefore, the working time can be shortened, which is useful in various industries that require bonding work.

In addition, according to the present invention, by using a honeymoon adhesive bonding without using a disposable cartridge, high adhesive strength can be imparted without using a static mixer, and cost reduction can be achieved. It can be applied to various industries such as bonding of decorative steel plates to panels, reinforcement joining of interior panels for vehicles, reinforcement joining of metal curtain walls, joining of panel reinforcements for elevators, and manufacture of steel furniture. is there.

The schematic diagram showing the cross section of the container used for the Example of this invention.

Explanation of symbols

1 Body 2 Adhesive (two-component reactive curable composition) one liquid 3 Mesh 4 Screen (for mesh support)
5 Screen holder A Discharge part

Claims (6)

A two-component reaction curable composition, each of which includes a porous material having pores communicating with the inside and outside of the container, and a wall made of one or more selected from the group consisting of resin, glass, wood, and metal A two-component reaction curable composition, wherein the two-component reaction curable composition is contained in a container internal space. The two-component reaction curable composition according to claim 1, wherein the porous material has a mesh. The two-component reactive curable composition according to claim 1 or 2, which is a two-component main component acrylic composition. The two-component reactive curable composition according to any one of claims 1 to 3, wherein each of the two components of the two-component reactive curable composition has a viscosity of 5 to 100,000 mPa · s at a temperature of 25 ° C. Composition. A two-component reaction curable adhesive comprising the two-component reaction curable composition according to any one of claims 1 to 4. 5. The liquid according to claim 1, wherein one liquid of the two-component reaction curable composition according to claim 1 is applied to the surface of one adherend. An adhesion method, wherein the other liquid of the liquid reaction curable composition is applied to other adherend surfaces, and the adherends are adhered to each other by joining the application surfaces.

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