KR101058424B1 - Odorless adhesive for reinforced plastic connections - Google Patents

Abstract

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an odorless adhesive for reinforcing plastics, comprising a curable resin, hardener, fiber glass powder, and thixotropic agent in an adhesive for reinforcing plastics. It contains 30 to 50% by weight resin, 20 to 40% by weight curing agent, 10 to 40% by weight glass fiber powder, and the remaining thixotropic agent to remove the peculiar disgusting smell generated by the adhesive used in the process of connecting conventional reinforcement plastics. It relates to an odorless adhesive for reinforced plastic connection that does not generate.

Adhesive, Reinforced Plastics

Description

Odorless adhesive for jointing fiber glass reinforced plastics}

The present invention relates to an odorless adhesive for reinforcing plastics, comprising a curable resin, a hardener, a fiber glass powder, and a thixotropic agent in an adhesive for reinforcing plastics. It contains 30 to 50% by weight resin, 20 to 40% by weight curing agent, 10 to 40% by weight glass fiber, and the remaining thixotropic agent to generate the peculiar disgusting smell generated by the adhesive used in the process of connecting conventional reinforced plastics. It relates to an odorless adhesive for reinforced plastic connection.

Fiber Glass Reinforced Plastics (FRP) is a material that combines aromatic nylon fibers such as glass fibers and Kevlar with thermosetting resins such as unsaturated polyester and epoxy resins. Lightweight, excellent durability, impact resistance, abrasion resistance, etc. It is not rust, thermally deformed, and easy to process, so it is the body of transportation materials such as construction materials, boats, airplanes, automobiles, ski goods, household bathtubs, helmets It is used as a material for various products such as tennis rackets, chairs, aircraft parts, etc. for industrial and general life.

As mentioned above, reinforced plastic is light, has excellent durability, impact resistance, abrasion resistance, etc., is not rusted, does not deform from heat, and is easy to process. In addition to the use of reinforced plastics, it is also widely used as a pipe passage in the pipe passage of the plumbing device for discharging pollutants and in the ventilation device for ventilating the indoor air.

When using reinforced plastic as a material for indoor contaminants and / or ventilation pipes, these reinforced plastic pipes connect the reinforced plastic pipes to each other using a connecting means for changing directions or for long distance use.

When connecting the reinforcement plastic products or when attaching to each other, the reinforcement plastic products by connecting the reinforcing material to the adhesive portion by applying the adhesive for the reinforcement plastic to harden the connection or attachment. For example, when a pipe made of reinforced plastic is connected to each other, two pipes are joined to each other and the reinforcement is padded so as to overlap the two pipes, and then a method is applied by applying an adhesive to the reinforcement and curing the adhesive. However, the adhesive used to connect the reinforcement plastic has a unique disgusting smell, so in the case of connecting the reinforcement plastic from the outside, the characteristic disgusting smell of the adhesive spreads to the air, so the working time for a certain period of time If you decide to work properly, there is no problem for the worker.However, when you connect the reinforced plastic indoors, the disgusting smell of the adhesive is generated so much that the worker cannot connect the reinforced plastic. There is a problem that requires ventilation. However, since reinforced plastic is mostly used as a pipe passage, there is no ventilation facility inside where the pipe passage is provided. Therefore, it is inconvenient and expensive because it needs to move the outside ventilation facility to the workplace connecting the pipe passage. In addition, since such a ventilation facility occupies a lot of workplace space, there is a concern that the space of the workplace connecting the reinforced plastics to the pipe becomes narrow and a safety accident increases.

In the operation of connecting the reinforcement plastic in the operation that the adhesive connecting the reinforcement plastic does not cause the smell can be solved the above-mentioned problem, but for the odorless adhesive that can still be used when connecting the reinforcement plastic There is no research.

In order to solve the above-mentioned problems, the present invention does not reduce the adhesive strength in comparison with the adhesive used in the conventional reinforcement plastic connection, the reinforcement plastic that does not have the peculiar disgust generated by the adhesive used in the conventional reinforcement plastic connection An odorless adhesive for connection is provided.

The present invention provides an odorless adhesive for reinforcing plastic connection comprising a curable resin, hardener, fiber glass powder, and thixotropic agent, which occurs in the adhesive used in the connection process for connecting the reinforcement plastic. An object of the present invention is to provide an odorless adhesive for reinforcing plastics that does not reduce adhesion without generating a peculiar disgusting odor.

The present invention can provide a odorless adhesive for reinforced plastic connection does not reduce the disgusting smell peculiar to the adhesive used in the conventional reinforced plastic connection, compared to the adhesive used in the conventional reinforced plastic connection. .

When the odorless adhesive for reinforcing plastic connection of the present invention is used, the adhesive does not generate disgusting odors, thus eliminating the need for additional facilities such as a ventilation system in the room, thereby reducing costs and preventing narrowness of the place, thereby providing a safer working environment. Can provide.

The present invention represents an odorless adhesive for reinforcing plastic connection that does not reduce the adhesion as compared to the adhesive used in conventional reinforcement plastic connection.

The present invention represents a odorless adhesive for reinforced plastic connection that does not have the peculiar disgusting odor that occurs with adhesives used in conventional reinforced plastic connections.

The present invention shows an odorless adhesive for reinforcing plastic connection, which does not have the disgusting smell peculiar to the adhesive used in the conventional reinforcing plastic connection, in contrast to the adhesive used for the conventional reinforcing plastic connection.

The present invention relates to an adhesive for reinforcing plastic, comprising a curable resin (resin), a curing agent, glass fiber powder and thixotropic agent so that the adhesive strength is not reduced in comparison with the adhesive used in the conventional reinforcing plastic connection, conventional reinforced plastic It represents a odorless adhesive for reinforced plastic connection that does not have the peculiar disgusting smell that occurs in the adhesive used for the connection.

This invention shows the odorless adhesive for reinforced plastics connection 30-30 weight% of curable resin, 20-40 weight% of hardening | curing agents, 10-40 weight% of glass fiber, and remainder thixotropic agent.

The present invention relates to an odorless adhesive for reinforcing plastics, comprising 30 to 50% by weight of curable resin, 20 to 40% by weight of curing agent, 10 to 40% by weight of glass fiber, and the remaining thixotropic agent.

Curable resin in the above can be used a odorless resin that does not smell.

The odorless resin serves as a mixed impregnation composition of powder glass fiber and thixotropic agent in the odorless adhesive, and an epoxy mixed composition of bisphenol A type (bisphenol A type) may be used as an example of the odorless resin. have.

In the above, the odorless resin may use 30 to 60% by weight, preferably 35 to 50% by weight, more preferably 41% by weight in 100% by weight of the odorless adhesive for the role of the resin.

As the epoxy mixed composition of the bisphenol A type, which is an odorless resin, the mixture of bisphenol A and an epoxy compound in a volume ratio of 1: 9 to 9: 1 may be used.

In the above epoxy compound may be cycloaliphatic epoxy resin.

Epoxy mixture composition of the bisphenol-A type of the odorless resin in the above can be used Aekyung Chemical (Korea) products.

In the above, the curing agent serves to fix the reinforced plastic by hardening the adhesive in the odorless adhesive.

The curing agent may be a polyamide-based and cycloaliphatic amine-based mixed composition.

In the above polyamide (cycloamide) and cycloaliphatic amine (cycloaliphatic amine) system can be used a mixed composition in a volume ratio of 1: 9-9: 1.

As the polyamide constituting the curing agent, any one selected from the group consisting of alicyclic polyamide resins and aromatic polyamide resins can be used.

The cycloaliphatic amine system constituting the curing agent may be any one selected from the group consisting of N-alkylcycloaliphatic amines (alkyl groups having 1 to 10 carbon atoms in alkyl groups), cycloaliphatic amines, and cycloaliphatic diamines. .

In the polyamide-based and cycloaliphatic amine-based mixed composition, Aekyung Chemical (Korea) may be used.

The curing agent may be an epoxy curing agent.

In the epoxy curing agent may be used Aekyung Chemical (Korea) products.

In the above, the curing agent may use a curing agent composed of the above-mentioned polyamide-based and cycloaliphatic amine-based mixed compositions, or may use an epoxy curing agent.

In the above, the curing agent may be used 20 to 40% by weight, preferably 25 to 35% by weight, more preferably 29% by weight in 100% by weight of the odorless adhesive for the role of the curing agent.

The glass fiber powder in the odorless adhesive serves to increase the strength and fire resistance of the adhesive and can be used long fiber glass fiber powder, or short fiber glass fiber powder.

In the above-mentioned glass fiber, a diameter of 5 to 150 µm may be used, and preferably 5 to 20 µm or 40 to 150 µm in diameter.

In the above glass fiber may be used 15 to 35% by weight, preferably 20 to 30% by weight, more preferably 25% by weight in 100% by weight of the odorless adhesive for the role of the glass fiber.

The thixotropic agent serves to prevent the flow of the adhesive in the odorless adhesive, an example of such a thixotropic agent may use aerosil (aerosil).

In the above thixotropic agent, the remainder of the curable resin, the curing agent, and the glass fiber may be used in 100% by weight of the odorless adhesive.

In the above, the thixotropic agent is 5 to 10% by weight, preferably 5 to 7% by weight, more preferably 5% by weight in 100% by weight of the odorless adhesive.

The odorless adhesive for reinforcing plastics connection of the present invention may be prepared by mixing a glass fiber and thixotropic agent in an odorless resin to obtain a mixture, and adding and mixing a curing agent to the mixture.

The odorless adhesive for reinforcing plastic connection of the present invention is hard to use the odorless adhesive because the odorless adhesive itself is cured when a curing agent is added, the curing agent in the odorless adhesive of the present invention before connecting the reinforced plastic, glass fiber and yo It is recommended to use a odorless adhesive after adding the curing agent to the mixture mixture.

The odorless resins, glass fibers, thixotropic agents and hardeners, which are major components in the preparation of the odorless adhesive, have already been mentioned above.

The present invention shows a method of connecting reinforced plastics using the odorless adhesive mentioned above. At this time, after applying the odorless adhesive to the portion to connect the reinforced plastic can be connected to the reinforced plastic by pressing the reinforced plastic.

The present invention relates to a method of connecting a reinforced plastic pipe for connecting the reinforcement plastic pipe to both ends of the connecting means after applying the above-mentioned odorless adhesive to both ends of the connecting means in the connection of the reinforced plastic pipe using the connecting means.

The connecting means may be a pipe joint, wherein the pipe joint is a cross joint as a pipe joint capable of extending the length of the reinforced plastic pipe and a pipe joint capable of changing direction. ) The reinforced plastic pipe can be connected using any one or more selected from the group of pipe joints, T type pipe joints, elbow type pipe joints, and U type pipe joints.

The odorless adhesive for reinforcing plastic connection of the present invention was carried out for various components and contents, in order to achieve the object of the present invention, it is desirable to provide the odorless adhesive for reinforcing plastic connection under the above-mentioned conditions.

Hereinafter, the contents of the present invention will be described in detail through Examples, Comparative Examples, and Test Examples. However, these are intended to explain the present invention in more detail, and the scope of the present invention is not limited thereto.

≪ Example 1 >

51 wt% of odorless resin, 20 wt% of glass fiber powder, and 7 wt% of aerosil were mixed to obtain a mixture, and 22 wt% of a curing agent was mixed with the mixture to prepare an odorless adhesive.

As the odorless resin, bisphenol epoxy (product name: NE-2000, Aekyung Chemical, Korea) was used.

In the above, the curing agent was an epoxy curing agent (product name: AKAMINE-2000, Aekyung Chemical, South Korea).

<Example 2>

41 wt% of odorless resin, 25 wt% of glass fiber powder, and 5 wt% of aerosil were mixed to obtain a mixture, and then 29 wt% of a curing agent was mixed with the mixture to prepare an odorless adhesive.

As the odorless resin, bisphenol epoxy (product name: NE-2000, Aekyung Chemical, Korea) was used.

In the above, the curing agent was an epoxy curing agent (product name: AKAMINE-2000, Aekyung Chemical, South Korea).

<Example 3>

After preparing 32% by weight of odorless resin, 23% by weight of glass fiber and 10% by weight of aerosil to obtain a mixture, 35% by weight of a curing agent was mixed with the mixture to prepare an odorless adhesive.

As the odorless resin, bisphenol epoxy (product name: NE-2000, Aekyung Chemical, Korea) was used.

In the above, the curing agent was an epoxy curing agent (product name: AKAMINE-2000, Aekyung Chemical, South Korea).

Comparative Example

An adhesive was prepared by mixing 35% by weight of vinyl ester resin, 30% by weight of silicon (SiO ₂ ) with resin, and 35% by weight of polyamide resin (G-0240, Kukdo Chemical, Korea) as a curing agent.

<Test Example 1>

Reinforcing plastics were connected using the odorless adhesive prepared in Examples 1 to 3 and the adhesive prepared in Comparative Example, respectively.

As shown in FIG. 1, the adhesive is applied to the inside of the pipe joint 20, and the odorless adhesives 30 and 30 'prepared in Examples 1 to 3 and the adhesive prepared in the comparative example are respectively spaced in a space where the reinforced plastic is bonded. After application, the ends of the reinforcement plastics 10 and the reinforcement plastics 10 'were inserted into both ends of the pipe joint 20 to connect the reinforcement plastics 10 and the reinforcement plastics 10'.

 The adhesive strength was measured after connecting the reinforced plastics using the respective adhesives prepared in Examples and Comparative Examples, and the results are shown in Table 1 below.

Table 1. Adhesive Strength Using Adhesives of Examples and Comparative Examples

Item Example 1 Example 2 Example 3 Comparative example Adhesive strength 108 122 107 100

* In Table 1, the numerical values in the Examples and Comparative Examples are as described above using the respective adhesive to connect the reinforcement plastic 10 and the reinforcement plastic (10 ') through the pipe joint 20 and then the reinforcement plastic ( 10) (10 ') shows the value of the strength required to separate from the pipe joint 20, wherein the numerical value of Table 1 is converted to the value of the comparative example 100, the higher the value the better the adhesive strength it means.

<Test Example 2>

Using the odorless adhesives prepared in Examples 1 to 3 and the adhesives prepared in Comparative Examples as in Test Example 1, respectively, the reinforcement plastics were connected to each other, and the presence or absence of cracks generated at the adhesive sites was visually measured. Is shown in Table 2 below.

Table 2. Degree of Cracking in Bonding Using Adhesives in Examples and Comparative Examples

Item Example 1 Example 2 Example 3 Comparative example Crack occurrence No crack No crack No crack Minute cracking

<Test Example 3>

Using the odorless adhesive prepared in Examples 1 to 3 and the adhesive prepared in Comparative Example as in Test Example 1 was measured whether the odor is generated when connecting the reinforced plastic, respectively, and the results are shown in Table 3 below. It was.

Table 3. Odor Occurrence Level during Bonding Using Adhesives of Examples and Comparative Examples

Item Example 1 Example 2 Example 3 Comparative example Odor occurs No smell No smell No smell Disgusting smell

The adhesive prepared in the embodiment of the present invention is compared with connecting the reinforced plastic using the adhesive prepared in the embodiment of the present invention as shown in Table 1 to Table 3 above using a conventional adhesive Compared with the conventional adhesive prepared in the comparative example (1) shows the adhesive strength of the equivalent level or more, the adhesive strength is excellent, (2) the crack does not occur in the adhesive site, the adhesive quality is excellent, (2) apply the adhesive of Comparative Example Although disgusting smell peculiar to the adhesive is generated, it can be seen that the adhesive of the embodiment of the present invention has an excellent effect of not smelling peculiar to the adhesive when applied.

As mentioned above, the odorless adhesive for reinforcing plastic connection of the present invention can be easily carried out even in an indoor space or a confined space where ventilation is weak because it does not smell particularly peculiar to the conventional adhesive.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and modified within the scope of the present invention without departing from the spirit and scope of the invention described in the claims below. It will be appreciated that it can be changed.

Odorless adhesive for reinforcing plastic connection of the present invention does not reduce the adhesive strength in contrast to the adhesive used in the conventional reinforcement plastic connection without generating a unique disgusting odor during the connection process for connecting the reinforced plastic bag such as ventilation facilities indoors No facilities are required, which saves money and prevents narrow spaces, providing a safer working environment.

Odorless adhesive for reinforcing plastics of the present invention can improve the working efficiency of the worker because it does not produce the disgusting smell peculiar to the conventional adhesive, in the overall operation according to the shortening of the process period for connecting the reinforced plastics, shortening the process period Can contribute to

1 is a cross-sectional view showing a state that the reinforced plastic pipe is connected by applying the odorless adhesive of the present invention to the pipe joint.

<Description of the symbols for the main parts of the drawings>

10, 10 ': FRP pipe

20 pipe joint

30, 30 ': Odorless adhesive for reinforced plastic connection

Claims (7)

An odorless adhesive for reinforcing plastics connection comprising 30 to 50% by weight of curable resin, 20 to 40% by weight of hardener, 10 to 40% by weight of glass fiber powder, and the remaining thixotropic agent. The odorless adhesive for strengthening plastic connection according to claim 1, wherein the curable resin is an epoxy mixed composition of bisphenol-A type. The odorless adhesive for reinforced plastic connection according to claim 1, wherein the curing agent is a polyamide-based cycloaliphatic amine-based mixed composition or an epoxy curing agent. Reinforcing plastic pipe using the connecting means, characterized in that the reinforcing plastic pipe is connected to both ends of the connecting means after applying the adhesive of any one of claims 1 to 3 on the connecting means. How to connect plastic pipes. 5. The method of claim 4, wherein the connecting means is a pipe joint. delete delete

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