JP2000225376A - Method for forming composite organic film-like body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel method forming a composite org. film-like member using a reticulated material or a linear material and a solventless two-pack type curable resin and a concrete corrosion-proof method capable of making corrosion-proof treatment not causing a flaw such as raising, blistering or peeling even in concrete having a wet surface for a short time. SOLUTION: In a method for forming a composite org. film-like member consisting of a film like org. resin and a reticulated or linear material, a solventless two-pack type curable resin is applied to the reticulated or linear material in a film form by two-liquid colliding and mixing spraying and cured to form the composite org. film-like member wherein the film-like org. resin is integrated with the reticulated or linear material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a composite organic film by spray-coating a solvent-free two-component curable resin onto a net or a linear material, and a method for forming a composite organic film with a net or a net. The present invention relates to a composite organic film with a linear material and a method for preventing corrosion of concrete using the composite organic film.

[0002]

2. Description of the Related Art A composite organic film is a film-like organic resin obtained by combining a plurality of materials, and is composed of a resin and an auxiliary material such as a reinforcing material. Conventionally, a composite organic film has been widely used as a reinforced resin film. For example, there are a glass fiber reinforced organic film, an organic film lined with a reinforcing material, and the like.

[0003] As a method for producing a glass fiber reinforced organic film, a reaction injection molding method (R-RIM method) in which a reactive resin composition in which glass fibers are previously kneaded is molded in a mold, a glass cloth or a glass mat is used. A reaction injection molding method (S-
RIM method) and the like are known.

In the R-RIM method, since the glass fibers are oriented in the direction of resin flow during injection, strength is secured in the direction of orientation of the glass fibers, but the reinforcing effect is obtained in the direction perpendicular to the direction of orientation of the glass fibers. Can not expect. Also, SR
The IM method can ensure uniform strength without causing non-uniform strength due to the orientation of the reinforcing material. However, the IM method requires a large injection molding device and a metal mold.

[0005] All of these methods use a large-scale apparatus or mold for injection molding, and are manufacturing methods for manufacturing a large number of the same products. It is completely unsuitable for producing small products in small quantities. In addition, there are restrictions on the size of products that can be manufactured,
Large scale products cannot be manufactured.

As an organic film lined with a reinforcing material,
For applications such as waterproofing, corrosion protection, reinforcement and slip prevention of concrete, etc., glass cloth / mat, carbon fiber cloth /
An FRP lining method of a vinyl ester resin, a polyester resin, an epoxy resin or the like using a reinforcing material such as a mat or an aramid fiber cloth / mat is known. In all of these lining methods, a fiber cloth / mat was used as a lining material.

The conventional lining method is a method comprising impregnating a reinforcing material as a lining material with a resin constituting a resin film to be lined with the reinforcing material. Therefore, in this case, the resin used must have low viscosity for impregnation. However, low-viscosity resins have a problem in that the film-forming properties are reduced. For this reason, there were technical difficulties that these two conflicting problems had to be solved. Generally, as a solution to this problem, a low molecular weight monomer is added to the resin composition or an organic solvent is added to adjust the viscosity of the resin so that the resin composition can be easily impregnated. And ii) application of a reinforcing material, iii) impregnation and application of a resin composition, and iv) application of a resin composition. In this method, the use of volatile components and organic solvents is unavoidable, has adverse effects on health and the environment, and further has the disadvantage of requiring multiple steps. In addition, the conventional lining method is essentially extremely difficult to apply to a resin composition having a high viscosity.

[0008] Further, a point to be pointed out as a problem in the prior art when applied to a concrete structure or the like is that a resin film reinforced with a lining greatly reduces the adhesiveness to concrete due to the presence of moisture. It is a fact. Therefore, in the concrete coating for the purpose of preventing corrosion by the organic coating material, the water content of the concrete is controlled to about 8% or less in order to secure the adhesive force between the concrete as the inorganic material and the organic coating as the organic material. In addition, a method is generally adopted in which a primer (undercoat) layer is sandwiched between a concrete surface and an organic coating to improve the adhesive strength.
However, it is not easy to control the water content of concrete to about 8% or less in construction sites having various restrictions. Also, in the state of high water content or dew condensation state of the concrete structure, even if the primer is applied,
The adhesive strength between concrete and resin coating cannot be ensured.

[0009] This point is of course not only a problem when the conventional lining method is applied, but also, for example, a corrosion prevention method in which a polyurea resin is directly spray-coated on concrete.

This is a great practical disadvantage in the surface treatment of concrete. For example, in order to sufficiently dry a concrete surface, it is enormous time and cost to use a heater with a blower, apply an undercoat, and perform the above four steps thereon. Therefore, it is practically impossible to carry out rehabilitation work that cannot take a sufficient time period, for example, rehabilitation work of a sewage pipe or the like in which the flow of water can be stopped only for several hours a day. Also, it is not uncommon for insufficient drying to cause defects such as floating, swelling, and peeling on the applied coating.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and uses a net-like material or a wire-like material and uses a solvent-free two-component curable resin. To provide a novel method for forming a composite organic film-like material, and a concrete anticorrosion method capable of performing anticorrosion work in a short time without causing defects such as floating, swelling and peeling even on concrete on a wet surface. It is intended for.

[0012]

SUMMARY OF THE INVENTION The present invention is a method for forming a composite organic film comprising a film organic resin and a reticulated material or a linear material. Solvent-free two-component curable resin is applied in a film form by two-component collision mixing spray coating,
Curing, a method of forming a composite organic film body to form a film-like organic resin body integrated with the mesh material or the linear material, and
This is a composite organic film produced by this method.

In the above method, the mesh material or the wire material can be fixed so as to cover the surface of the object to be coated to form a composite organic film covering the object.

According to the present invention, there is also provided a mesh material or a wire material fixed so as to cover the concrete surface, and a two-component collision-mixing spray coating of a solvent-free two-component curable resin on the mesh material or the wire material, Cured, at least one of the mesh material or wire material
The present invention also provides a concrete anticorrosion method in which a composite thick-film organic resin body with a net-like material or a wire-like material in which a part is embedded is formed so as to cover the concrete surface.

The present inventors directly spray-coat a solvent-free two-component curable resin having a high curing rate on a net-like material or a linear material arranged in a plane, so that the above-mentioned resin completely fills the mesh voids. It has been found that not only the surface on the coating side of the mesh material or the linear material arranged in a plane but also the back surface thereof can be simultaneously covered with the resin, and the present invention has been completed. Hereinafter, the present invention will be described in detail.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION In the method of forming a composite organic film according to the present invention, a two-component collision-mixing spray coating of a solvent-free two-component curable resin is applied to a net or a linear material in the form of a film. Allow to cure and integrate.

The net material is not particularly limited in its material, shape, structure and the like, and can be appropriately selected according to the application. For example, in the case of materials, metal mesh materials such as iron, aluminum, and stainless steel, mesh fibers made of inorganic fibers such as glass fiber and carbon fiber, mesh materials made of organic fibers such as aramid fiber, and various materials such as vinyl chloride, polyethylene, and polyester. It may be a net material made of synthetic resin, a net material made of various natural materials such as plant fibers, or the like; the shape may be any planar shape, any curved surface shape; A knitted structure, a structure in which wires are arranged in a grid pattern and intersections are joined as necessary, a structure in which a number of parallel cuts are made in a plate material and stretched to form a net, and a structure in which a material such as synthetic resin is formed into a net And various structures such as a structure in which a plate-like material is punched in a net shape.

A plurality of the linear materials can be used by arranging them in a plane. The material is not particularly limited and can be appropriately selected depending on the application. For example, the material may be a linear material made of the above-described materials.

In the present invention, the mode in which the resin is integrated with the mesh material or the linear material is not particularly limited, and various modes are possible. For example, as shown in FIG. 1 a, the applied resin protrudes through the mesh space or the arrangement interval of the wire on the back side of the application side surface of the mesh or the wire, and part or all of the mesh or the wire is removed. When the mesh material or the wire material is embedded in the resin and thus becomes the core material, as shown in FIGS. 1b and 1c, the applied resin is meshed on the back side of the application side of the mesh material or the wire material. When the resin partially embeds so as to partially protrude through the gaps and the spacing between the wires and the resin surrounds a part of the mesh or the wire, the resin is applied from both sides as shown in FIG. Or part or all of the wire material is completely embedded inside the resin,
Therefore, the case where a net-like material or a linear material is used as a core material may be adopted.

The size of the mesh of the mesh material and the arrangement interval of the wire material are not particularly limited as long as the object of the present invention is achieved. The properties of the resin to be performed, for example, in consideration of the viscosity of the resin at the time of application, when the resin is spray-coated on these net-like materials or linear materials arranged in a plane, the resin is applied in a film form, and What is necessary is just to set to such an extent that the resin can be integrated with the mesh material or the wire material. For example, in the case of a net-like material, generally, a continuous film-like body without a break can be easily formed, so that the size of the mesh is preferably 10 mm or less. The size of the mesh of the mesh material and the lower limit of the arrangement interval of the wire material are not particularly defined. However, it is necessary to be able to be integrated with the film-like organic resin body, and it is preferable that at least a part of the resin is of such a degree that it can protrude between the meshes and the arrangement intervals. The mesh size of the mesh material and the arrangement interval of the linear materials are more preferably in the range of 1 to 5 mm, and still more preferably in the range of 3 to 5 mm.

It is preferable that the mesh material and the wire material can maintain the structure and arrangement so that the resin is applied in a film form when the resin is spray-coated thereon. . Therefore, it may be attached to a support member for maintaining and fixing the structure and arrangement, or a support member may be attached as necessary.

The solvent-free two-part curable resin is not particularly limited as long as it can form a film-like organic resin by spray coating.
Generally, it consists of two liquids, a main component and a hardener,
It may be a resin which is mixed by spray coating and starts to cure, and a resin comprising an isocyanate component (A) and a polyamine and / or a polyol component (B) can be suitably used. The film-like organic resin obtained when the component (B) is a polyamine comprises a polyurea-based resin. Further, the film-like organic resin obtained when the component (B) is a polyol is made of a polyurethane resin. On the other hand, the film-like organic resin obtained when the component (B) is a mixture of a polyamine and a polyol is composed of a polyurethane / polyurea-based resin.

The isocyanate component (A) includes:
Organic polyisocyanates, isocyanate prepolymers, and mixtures thereof can be used.

The organic polyisocyanate is not particularly limited, and known polyisocyanates can be used. Examples thereof include aromatic polyisocyanates and aliphatic polyisocyanates.

The aromatic polyisocyanates are not particularly restricted but include, for example, liquid diphenylmethane diisocyanate or a partial prepolymer of diphenylmethane diisocyanate obtained by carbodiimide modification, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, a mixture thereof (hereinafter referred to as "TDI"), diphenylmethane-4,4 '
Diisocyanate (hereinafter referred to as “MDI”), polymethylene polyphenyl polyisocyanate,
These modified carbodiimidized products and modified buretized products can be exemplified.

The aliphatic polyisocyanates are not particularly restricted but include, for example, dicyclohexylmethane-
4,4'-diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, hydrogenated xylylene diisocyanate, modified isocyanurate thereof, modified carbodiimidation thereof and the like.

As the above-mentioned isocyanate prepolymer, for example, some of the isocyanate groups in the organic polyisocyanate such as those exemplified above may have a number average molecular weight of 200.
And a partial prepolymer obtained by reacting with a polyol of up to 8,000.

The above-mentioned isocyanate prepolymer is prepared by mixing the above-mentioned organic polyisocyanate with a polyol in a nitrogen gas stream.
It can be obtained by heating at 0 to 80 ° C. for several hours to react a part of the isocyanate group contained with the polyol. The polyol is not particularly limited, and examples thereof include ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, dipropylene glycol, trimethylene glycol, 1,3-butanediol, 1,4-butanediol, and 1,5-pentane. Diol, 1,2-hexyl glycol, 1,10-decanediol, 1,2-cyclohexanediol, glycerin, 1,2,6-hexanetriol, 1,1,1-trimethylolethane, 1,1,1- Polyols such as trimethylolpropane; polyether polyols obtained by addition polymerization of one or more epoxides such as ethylene oxide, propylene oxide, butylene oxide, and tetrahydrofuran to a polyhydric alcohol such as pentaerythritol. It can gel. In the present invention, the polyol preferably has a molecular weight of 200 to 8000, and more preferably 500 to 5,000. These polyols can be used alone or in combination of two or more.

The polyamine used in the component (B) is not particularly limited. In the present invention, for example, the polyoxyalkylene polyamine (a)
And a mixture of an active aromatic diamine (b) having no electron-withdrawing group in the aromatic nucleus and having an alkyl substituent having 5 or less carbon atoms at a position adjacent to the amino group, excluding toluenediamine. It can be suitably used.

Examples of the polyoxyalkylene polyamine (a) include a number average molecular weight of 200 to 100.
00, which includes two or more aliphatically bonded amino groups per molecule, such as a polyoxyalkylene having at least two or more hydroxyl groups. The terminal hydroxyl group of the polyol can be obtained by a method of reacting with ammonia under high temperature and high pressure using a hydrogenation-dehydrogenation catalyst.

As the above polyoxyalkylene polyamine (a), for example, as polyoxypropylene diamine, Jeffamine D-2000 (Huntsman
Specialty Chemicals, Amine equivalent about 10
00); as a polyoxypropylene triamine, Techslim TR-5050 (manufactured by Huntsman Specialty Chemicals, amine equivalent: about 1930), Jeffamine T-403 (Heightsman Specialty Co., Ltd.)
Chemicals Co., Ltd., amine equivalent: about 160).

Further, at least a part of the primary amino groups in the polyoxyalkylene polyamine (a) has a general formula CH ₂ ＣC (R) —Y (where R represents a hydrogen or a methyl group) Y represents an electron withdrawing group.) A modified polyoxyalkylene polyamine secondary-modified by a Michael addition reaction with an unsaturated hydrocarbon compound represented by the following formula (1) can also be suitably used.

The electron-withdrawing group represented by Y is not particularly restricted but includes, for example, ester residues, ketone residues, cyano residues, substituted or unsubstituted amide residues, sulfonic acid residues, sulfonic acid esters Residues and the like can be mentioned.

The unsaturated hydrocarbon compound is not particularly restricted but includes, for example, n-butyl acrylate, isobutyl acrylate, t-butyl acrylate, 2-ethylhexyl acrylate, methyl acrylate, lauryl acrylate, acrylic acid Acrylic esters such as stearyl and propyl acrylate; n-butyl methacrylate, isobutyl methacrylate, t-butyl methacrylate, 2-ethylhexyl methacrylate, methyl methacrylate, lauryl methacrylate, stearyl methacrylate, propyl methacrylate and the like Methacrylic acid esters; acrylonitrile; acrylamide; N, N'-dimethylacrylamide; ethyl vinyl sulfone; methyl vinyl sulfonate, ethyl vinyl sulfonate, and the like.

Except for the above-mentioned toluenediamine, the active aromatic diamine (b) having no electron-withdrawing group in the aromatic nucleus and having an alkyl substituent having 5 or less carbon atoms at a position adjacent to the amino group includes Specifically, for example, 1,3-dimethyl-2,4-diaminobenzene, 1,3-diethyl-2,4-diaminobenzene, 1,3-dimethyl-2,
6-diaminobenzene, 1,4-diethyl-2,5-diaminobenzene, 1,4-diisopropyl-2,5-diaminobenzene, 1,4-dibutyl-2,5-diaminobenzene, 1,3,5- Triethyl-2,4-diaminobenzene, 1,3,5-triethyl-2,6-diaminobenzene, 1,3,5-tripropyl-2,6-diaminobenzene, 1-methyl-3,5-diethyl- 2,4-
Diaminobenzene, 1-methyl-3,5-diethyl-
2,6-diaminobenzene and the like can be mentioned. These can be used in combination of two or more.

Except for the above-mentioned toluenediamine, the active aromatic diamine (b) having no electron-withdrawing group in the aromatic nucleus and having an alkyl substituent having 5 or less carbon atoms at a position adjacent to the amino group. At least some of the primary amino groups are
Modified polyamine secondary-modified by the Michael addition reaction with the unsaturated hydrocarbon compound can also be suitably used.

In the polyamine used for the component (B), except for the polyoxyalkylene polyamine (a) and toluenediamine, the aromatic nucleus does not have an electron-withdrawing group, and has a carbon atom adjacent to the amino group. The mixing ratio with the active aromatic diamine (b) having an alkyl substituent of 5 or less is the same as that of the polyoxyalkylene polyamine (a) 10
The active aromatic diamine (b) having no electron-withdrawing group in the aromatic nucleus and having an alkyl substituent having 5 or less carbon atoms at a position adjacent to the amino group, excluding the toluenediamine, is based on 0 parts by weight. A ratio of 15 to 100 parts by weight is preferred.
When the compounding ratio is less than 15 parts by weight, the film-like organic resin body formed is extremely soft and semi-adhesive. The body becomes extremely hard and brittle,
Not practical for some applications. More preferably 20 to
40 parts by weight.

On the other hand, the polyol used for the component (B) is not particularly limited. In order to adjust the physical properties of the obtained film-like organic resin body, a low-molecular-weight one having a number average molecular weight of 62 to 1000 is used, and the main component of the film-like organic resin body has a high molecular weight of 1,000 to about 10,000. Can be used.

As the low-molecular-weight polyol, those having the above-mentioned molecular weight range among the polyols exemplified above for the production of the isocyanate prepolymer can be used. On the other hand, the high molecular weight polyol is preferably a polyether polyol or a polyester polyol. Examples of the polyether polyol include those exemplified above. Examples of the polyester polyol include various polyester polyols and polycaprolactone polyols produced by a reaction between an aliphatic dibasic acid and an aliphatic glycol. Such polyester polyols include polyhydric alcohols, for example, ethylene glycol, propylene glycol, diethylene glycol,
1,4-butanediol, polyether polyol, bis (hydroxyethyl) terephthalate, glycerol, trimethylolpropane or pentaerythritol or mixtures thereof and polycarboxylic acids, especially dicarboxylic acids or their ester-forming derivatives, such as succinic acid , Glutaric acid and adipic acid or dimethyl esters thereof, sebacic acid, phthalic anhydride, tetrachlorophthalic anhydride or dimethyl terephthalate. Also, a lactone that is a cyclic ester, for example, a polyester obtained by polymerizing caprolactone together with a polyol can be used.

In the present invention, the solvent-free two-part curable resin comprising the isocyanate component (A) and the polyamine and / or polyol component (B) may contain a third component other than the above. For example, if necessary, auxiliary agents such as commonly used plasticizers, flame retardants, fillers, various stabilizers, and coloring agents can be used. The third component is preferably one that can be used by being added to the component (A) or the component (B).

In the present invention, the above-mentioned solvent-free two-component curable resin is applied in a film-like two-component collision-mixing spray application onto the above-mentioned mesh material or linear material. The coating may be applied to one side or both sides of the mesh material or the linear material arranged in a plane. The components of the two components of the two-component curable resin, for example, the isocyanate component (A) and the polyamine and / or the polyol component (B) are subjected to collision mixing and sprayed, and the curing reaction progresses to some extent during scattering. In this state, a film-like organic resin body is formed by applying the film-like material or the wire-like material in the form of a film and then further curing the film-like material or the wire-like material. The above-mentioned isocyanate component (A) and the above-mentioned polyamine and / or polyol component (B) need to be kept liquid at use temperature. It is preferable to use a high-pressure two-liquid collision mixing spraying device for the two-liquid collision mixing spray coating.

The high-pressure two-liquid collision mixing spraying apparatus is not particularly limited. For example, as a proportion unit, H-2000 manufactured by Gasmer USA, H-3500 manufactured by Gasmer USA, FF-1600 manufactured by Gasmer USA, Toho Machine Component High Pressure Discharge Mixing Machine Model H
F-100 and the like. Examples of the mixture coating gun for a high-pressure two-liquid collision mixing type spraying apparatus having a mechanical self-cleaning mechanism include, for example, "GX-7 gun" manufactured by Gasmer, USA and "GX-7-4" manufactured by Gasmer, USA.
As a device having an air cleaning mechanism, a “Probler Gun” manufactured by Glasscraft Co., Ltd. of the United States and the like can be mentioned.

The mixing ratio between the isocyanate component (A) and the polyamine and / or polyol component (B) is as follows:
The equivalent ratio of the amino group and the hydroxyl group in the component (B) to the isocyanate group in the component (A) is 1 / 0.7.
A ratio of 割 合 1 / 1.5 is preferable. If the ratio is outside the above range, the physical properties of the obtained organic film may be adversely affected, for example, curing may not proceed sufficiently.

In the present invention, the solvent-free two-component curable resin is cured by touch when the two-liquid impingement mixed spray coating is applied, that is, the resin is cured to the extent that a finger is pressed against the resin so that a fingerprint is not attached. The time required for the heat treatment is preferably 3 minutes or less. If the finger touch hardening time is longer than 3 minutes, it may be difficult to apply the film to a mesh material or a wire material. Depending on the application, a shorter touch hardening time may be more suitable. For example, a mesh material or a wire material is fixed so as to cover at least one surface selected from the group consisting of concrete, mortar and rock. However, when forming a composite organic thick film covering the surface of the object, from the viewpoint of construction, it is preferably within 20 seconds, more preferably within 10 seconds. The touch hardening time can be controlled by adjusting the type and amount of the compound used in the component (B) and the amount of the third component such as the plasticizer described above. For example, the use of a polyamine as the component (B) can shorten the touch hardening time.

In the present invention, the resin that has been impact-mixed in the mixing coating gun may be applied so as to impinge at an angle of 45 ° to 90 ° on the surface formed by the mesh material or the wire material. preferable. If the collision occurs at an angle of less than 45 °, a uniform film-shaped body may not be obtained. More preferably 75
° to 90 °.

In the present invention, when using the high-pressure two-liquid impingement mixing type spraying apparatus, the impingement mixing pressure is 6 to
It is preferably 15 Mpa. Further, the distance between the mesh material or the linear material and the mixed coating gun is preferably about several tens cm to 1 m.

In the present invention, the thickness of the composite organic film is not particularly limited, and can be appropriately set according to the application, the mesh material or the wire material to be used. As long as it can be applied in the form of a film, it can be applied on a net-like material or a linear material so that the resin film thickness is, for example, 0.5 to 10 mm or more. The thickness of the composite organic film body can be generally greater than the resin film thickness on the mesh material or the wire material by integrating the mesh material or the wire material to be used in the above-described manner. If the resin film thickness is less than 0.5 mm, the durability is inferior. If the resin film thickness is more than 10 mm, the amount of the resin used increases, and considering that it is economically disadvantageous, the resin film thickness should be within this range. It is preferable that

In the present invention, the net-like material and the wire-like material have shapes to be molded, for example, a flat shape, a curved shape,
The shape may be a three-dimensional shape or the like, and the shape may be directly spray-coated on a net-like material or a linear material. In this case, a composite organic film having a desired shape can be formed. Such applications are not particularly limited, and include, for example, covers and ducts of mechanical devices, and large-sized molded products having such complicated shapes can be manufactured at low cost even if a small number of products are manufactured. And can be easily manufactured.

Further, the mesh material and the wire material may be fixed so as to cover the surface of the object to be coated. The fixing method is not particularly limited, but may be, for example, fixing by bolts and nuts, fixing by welding, or the like, depending on the application. In this case, it is possible to form a composite organic film covering fixed on the surface of the object. The surface of the object is not particularly limited, and may be, for example, at least one surface selected from the group consisting of concrete, mortar, and rock. Such applications are not particularly limited,
For example, applications such as corrosion prevention, waterproofing, reinforcement, and slip prevention of structures such as concrete and mortar and structures such as concrete pipelines can be mentioned. Also, cliffs, tunnels,
Corrosion prevention of construction surface in civil works such as ponds and waste disposal sites,
It is also applicable to applications such as waterproofing, water leakage prevention, reinforcement, and slippage prevention.

As a construction method, for example, a mesh material or a wire material is fixed so as to cover the concrete surface, and a solvent-free two-component curable resin is sprayed onto the mesh material or the wire material by a two-component collision mixing spray. Applying, curing and forming a composite thick film organic resin body with a mesh material or a wire material, which embeds at least a part of the mesh material or the wire material, so as to cover the concrete surface. Thus, concrete corrosion protection can be performed. When applied to rehabilitation works for sewage pipes, etc., anticorrosion work can be performed on the inner surface of the pipes.
For this, for example, a mesh material such as a cylinder, a semi-cylinder, or the like is fixed to the inner surface of the pipeline, or a material in which a number of linear materials are fixed in parallel to a frame formed along the inner surface of the pipeline. After fixing to the inner surface of the pipe, a resin may be applied. According to this method, even when moisture is present on the concrete surface,
Since the covering can be fixed to the concrete surface, it can be applied in a very short time.

When the method of the present invention is applied, the coating of the composite organic film is formed integrally with the mesh or the wire through the fact that the mesh or the wire is fixed to the surface of the object to be coated. It is fixed to an object such as concrete. Therefore, even in the presence of moisture, it is possible to avoid adverse effects due to a decrease in adhesion between the resin and the concrete surface, and a simple and short process can be performed without being affected by conditions such as humidity and moisture on the concrete surface. Thus, coating, corrosion prevention, waterproofing, reinforcement construction, and the like can be performed without causing defects such as floating, swelling, and peeling. Further, since the method of the present invention is solvent-free, there is no possibility that the method will adversely affect the human body and the environment when the method is performed.

[0052]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

Example 1 As a solvent-free two-component curable resin, a solvent-free two-component resin containing an isocyanate component (A) and a polyamine component (B)
A liquid-curable polyurea-based resin (Toughguard RG, manufactured by Nippon Paint Co., Ltd.) was used. As a spraying device, a two-liquid collision mixing type spray device (manufactured by Gasmer) was used. In this case, the collision mixing ratio of the A component and the B component is about 1 / volume ratio.
The NCO index, which is the ratio of the amino groups in the B component to the isocyanate groups in the A component, is about 1.
05. GX-7 manufactured by Gasmer Co., Ltd.
A gun was used. The raw material temperature is 55 ± for both A component and B component.
The temperature was 5 ° C., and the raw material supply pressure was 7 to 12 Mpa. As the mesh material, a stainless steel mesh having a mesh size of 1 mm was used. Spray the reticulated material on one side of the reticulated material, placing the reticulated material on a level ground, keeping the distance from the mixing coating gun at about 30 cm, and keeping the resin jetting direction perpendicular to the surface formed by the reticulated material. Applied.

The thickness of the resin film of the formed polyurea material was 2 to 3 mm on the surface on the coating side of the mesh material. Five seconds after the application, the application surface was pressed with a finger, but had hardened to the extent that no fingerprint was attached.

Although the coated surface was a fine uneven surface corresponding to the mesh, it was a continuous film, with no holes, wrinkles, discontinuous portions, cracks, and a normal surface. Although a resin film was formed on the surface on the application side of the mesh material, the resin hardly protruded from the back surface. The resin film body and the mesh material could not be peeled off, and were integrated with each other. Looking closely,
The coating side of the wire was wrapped in the film around the protruding part of the intersection of the wire of the mesh material.

Examples 2-3 A composite organic film was formed in the same manner as in Example 1, except that the mesh size of the mesh material was 3 mm and 5 mm, respectively. The thickness of the resin film of the formed polyurea material is 2 to 3 mm and 3 to 4 mm on the surface on the coating side of the mesh material.
mm. Also, a coating is formed on the back side,
Each was 2-3 mm.

Each of the coated surfaces was a fine uneven surface corresponding to the mesh, but was a continuous film, with no holes, wrinkles, discontinuous portions, cracks, and a normal surface. The resin was coated not only on the surface on the coating side of the reticulated material but also on the back side, and most of the reticulated material was embedded in the resin body, thereby forming a composite organic film material having the reticulated material as a core material.

Example 4 A composite organic film was formed in the same manner as in Example 1 except that the mesh size of the mesh material was 10 mm. The resin film thickness of the formed polyurea material was 4 to 6 mm on the surface on the application side of the mesh material.

Although the coated surface was a fine uneven surface corresponding to the mesh, it was a continuous film, with no holes, wrinkles, discontinuous portions, cracks, and a normal surface. However, the resin was coated only on the surface on the application side of the mesh material, and the resin protruded from the mesh on the back surface, but did not cover the mesh material. This is presumed to be because the meshes were coarse and the resins protruding from the meshes to the backside were cured without being integrated. The reticulated material and the resin film could not be peeled off and were integrated. When observed in detail, the coated side of the wire was wrapped in the film around the protruding portion of the intersection of the wire of the mesh material.

Example 5 A composite organic film was formed in the same manner as in Example 1 except that the mesh size of the reticulated material was 3 mm, and the touch hardening time of the resin was adjusted to 20 seconds.

Although the coated surface was a fine uneven surface corresponding to the mesh, it was a continuous film, with no holes, wrinkles, discontinuous portions, cracks, and a normal surface. The resin was coated not only on the surface on the application side of the mesh material but also on the back side, and most of the mesh material was embedded in the resin body and integrated.

Example 6 The same isocyanate component (A) as used in Example 1 and a part of the polyamine used in Example 1 were used as a solvent-free two-part curable resin, and the finger-curing time of the resin was changed. Was 120 seconds, and a solvent-free two-component curable polyurethane / polyurea resin containing the component (B) replaced with a polyol was prepared and used. 3 mm mesh size of mesh material
In the same manner as in Example 1, a composite organic film was formed.

Although the coated surface was a fine uneven surface corresponding to the mesh, it was a continuous film, with no holes, wrinkles, discontinuous portions, cracks, and a normal surface. However, the resin was coated only on the surface on the application side of the mesh material, and the resin protruded from the mesh on the back surface, but did not cover the mesh material. This is presumed to be because the applied resin did not adhere to the back surface enough to cover the back surface. The reticulated material and the resin film could not be peeled off and were integrated. When observed in detail, the wire was covered with the resin film around the protruding portion of the intersection of the wire of the mesh material.

Example 7 The same isocyanate component (A) as used in Example 1 and a polyol component (B) having a finger-curing time of 180 seconds as the solvent-free two-component curable resin in Example 1. And a solvent-free two-component curable polyurethane-based resin containing: The mesh size of the mesh material was 3 mm, and a composite organic film was formed in the same manner as in Example 1.

Although the coated surface was a fine uneven surface corresponding to the mesh, it was a continuous film, with no holes, wrinkles, discontinuous portions, cracks, and a normal surface. However, the resin was coated only on the surface on the application side of the mesh material, and the resin protruded from the mesh on the back surface, but did not cover the mesh material. It is presumed that this is because the applied resin did not adhere to the rear surface enough to cover the rear surface because the finger touch hardening time was slightly long. The reticulated material and the resin film could not be peeled off and were integrated. When observed in detail, the wire was covered with the resin film around the protruding portion of the intersection of the wire of the mesh material.

Comparative Example 1 The coating was carried out in the same manner as in Example 1 except that the mesh size of the mesh material was 15 mm.

The coated surface did not form a continuous film, was not applied in a film on a reticulated material, and a composite organic film could not be formed. This is presumably because the mesh size was too large for the resin used, and the resin could not be applied to the mesh material in the form of a film.

Comparative Example 2 The solvent-free two-component curable polyurethane resin used in Example 7 was used as the solvent-free two-component curable resin. The one adjusted to the minute was used. The coating was performed in the same manner as in Example 1 except that the mesh size of the mesh material was 3 mm.

The coated surface did not form a continuous film, and was not applied in a film on the reticulated material, and a composite organic film could not be formed. This is presumed to be due to the fact that the touch hardening time of the resin was longer than the mesh size, and the resin could not be applied to the mesh material in the form of a film.

Comparative Example 3 An epoxy resin (Tough Guard E overcoat, manufactured by Nippon Paint Co., Ltd.) was applied to a mesh material having a mesh size of 3 mm. The touch hardening time of the resin was 18 hours.

The coated surface did not form a continuous film, was not applied in a film on a reticulated material, and a composite organic film could not be formed.

[0072]

Since the present invention has the above-described structure, it is possible to easily manufacture a complicated shape or a large molded product at a low cost. In addition, it is possible to carry out coating, corrosion protection, waterproofing, reinforcement construction, and the like with good quality in a simple and short process without being affected by the conditions such as the humidity and moisture of the concrete surface. Further, the method of the present invention has a low possibility of adversely affecting the human body and the environment.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a composite organic film according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Film-shaped organic resin body 2 Reticulated material

Claims (11)

[Claims] 1. A method for forming a composite organic film comprising a film organic resin and a reticulated material or a linear material, wherein the reticulated material or the linear material comprises a solvent-free two-component curable resin. Into a film 2
A method for forming a composite organic film body, comprising applying a liquid impingement mixture spray coating and curing to form a film organic resin body integrated with the net material or the linear material. 2. The method according to claim 1, wherein the solvent-free two-part curable resin comprises an isocyanate component (A) and a polyamine and / or polyol component (B). 3. The method according to claim 1, wherein a mesh having a mesh of 10 mm or less is used. 4. The method according to claim 1, wherein the solvent-free two-part curable resin has a finger-touch curing time of 3 minutes or less. 5. The method according to claim 1, wherein the film-like organic resin body embeds at least a part of a mesh material or a wire material. 6. The composite organic film according to claim 1, wherein the reticulated material or the linear material is fixed so as to cover the surface of the object to be coated, and a composite organic film body covering the object is formed. the method of. 7. The method according to claim 6, wherein the object surface is at least one surface selected from the group consisting of concrete, mortar and rock. 8. The method according to claim 7, wherein the solvent-free two-part curable resin has a finger touch curing time of 20 seconds or less. 9. The two-liquid impingement mixing spray coating uses a high-pressure two-liquid impingement mixing type spraying apparatus using a collision coating pressure of 6 to 15 MPa and a mixing coating gun equipped with a mechanical self-cleaning mechanism. Claim 1 which is used
The method according to any one of claims 1 to 8. 10. A mesh material or a wire material is fixed so as to cover the concrete surface, and a solvent-free two-component curable resin is applied to the mesh material or the wire material by two-component collision-mixing spray coating and cured. A concrete anticorrosion method comprising forming a composite thick film organic resin body with a reticulated material or a wire material embedded at least a portion of the reticulated material or the wire material so as to cover the concrete surface. Method. 11. A composite organic film formed by the method according to claim 1.