JPH09295370A - Formation of composite film and composite coating structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrally form a layer consisting of cement mortar, concrete and paving asphalt by applying a primer composed of a urethane resin on a film of a polyurea resin and forming a film composed of an epoxy resin on the primer layer. SOLUTION: A composite film is formed on the surface of a structure such as a concrete or iron structure by a method wherein a film A composed of a polyurea resin is formed by a spray method and a primer composed of a urethane resin is applied to the film A to form a film B and an epoxy resin is applied to the film B to form a film C and at least one material selected from cement mortar, cement concrete and paving asphalt is cast on the film C to form a layer D.

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 coating and a composite coating structure, and more particularly to a coating excellent in waterproofness, acid resistance, alkali resistance and mechanical strength and concrete, cement mortar, asphalt or metal. The present invention relates to a method for forming a composite coating structure that integrates and, and a composite coating structure having the composite coating.

[0002]

2. Description of the Related Art Conventionally, the surfaces of concrete structures such as floor, walls and ceilings of concrete structures, cement products such as cement mortar and polymer cement, or steel structures such as steel structures are protected against corrosion and water. For the purpose, various protective films are formed or various treatments are performed. Further, in order to waterproof the outer wall of a building, etc., it is also practiced to form the outer wall with mortar after waterproofing with a waterproof sheet or the like.

Various materials are used to form this protective film. For example, as the anticorrosion material, epoxy resin-based, urethane resin-based, vinyl ester resin-based and other reaction-curable resins are often used, and as the waterproof material,
As a coating type, a reaction curable resin such as an epoxy resin type, a urethane resin type, an unsaturated polyester resin type or a vinyl ester resin type, or a coating material such as an asphalt emulsion or a rubber modified asphalt emulsion is used. Further, as a sheet waterproof material, polyethylene, soft polyvinyl chloride, ethylene-vinyl acetate copolymer, a method of forming a waterproof layer by stacking or adhering sheets of synthetic rubber or the like, or by heating and melting asphalt. Also, it is made with a structure.

[0004]

However, depending on the conventional waterproof material, anticorrosive material, or method, there are cases where the performance required for the coating cannot be sufficiently satisfied. For example, it is extremely difficult to form a coating on the surface of a concrete structure, a steel structure, or the like, and then further integrate concrete or asphalt on the coating. Even if concrete or asphalt can be formed on the coating, there are cases where the adhesion to the coating is low or the performance of the coating itself does not meet the requirements. Also, a coating made of an epoxy resin-based material can be integrated with concrete or asphalt, but with this epoxy resin-based coating alone, the elongation properties of the material are insufficient for cracks that occur in the structure. However, there is a possibility that cracks may occur and the waterproof and anticorrosion functions may not be fully exerted. Therefore, it is conceivable to use an epoxy resin-based or urethane resin-based material having elongation properties added to the material, but a coating film made of such material generally has a problem of low mechanical strength. Furthermore, the asphalt-based material and the sheet waterproof material have a problem that the adhesion to concrete, asphalt or metal is very low. Further, the sheet waterproof material has a problem that the joint portion of the sheet is apt to have a defect and the waterproof function is impaired.

Therefore, the first object of the present invention is waterproofness,
It is an object of the present invention to provide a method for forming a composite coating capable of integrally forming a layer made of cement concrete, cement mortar or asphalt on a coating having excellent acid resistance, alkali resistance and mechanical strength.

A second object of the present invention is to provide a method capable of forming a composite coating film having excellent waterproofness, acid resistance, alkali resistance and mechanical strength on the surface of a structure.

Further, a third object of the present invention is to provide a composite coating structure coated with a composite having the above-mentioned excellent properties.

[0008]

In order to solve the above-mentioned problems, the first aspect of the present invention is to form a coating film (A) made of a polyurea resin by a spraying method, and coat the coating film (A) on the coating film (A). To the above, a primer made of urethane resin is applied to form a coating (B), and then an epoxy resin is applied onto the coating (B) to form a coating (C). At least one selected from cement mortar, cement concrete and asphalt for paving on
The present invention provides a method for forming a composite coating, which comprises a step of casting a seed to form a layer (D).

The second aspect of the present invention is to form a coating film (A) made of a polyurea resin on the surface of the structure (E) by a spray method, and to form a urethane resin on the coating film (A). Is applied to form a coating (B), then an epoxy resin is applied onto the coating (B) to form a coating (C), and further cement mortar is applied onto the coating (C). (D) at least one selected from cement concrete and asphalt for paving
The present invention provides a method for forming a composite coating, the method including the step of forming.

Furthermore, in the third aspect of the present invention, the surface of the structure (E) is coated with at least one primer selected from an epoxy resin and a urethane resin to form a coating film (F), and then a poly (F) is formed. Coating made of urea resin (A)
Is formed by a spray method, a primer made of urethane resin is applied on the coating (A) to form a coating (B), and then an epoxy resin is applied on the coating (B) to form a coating ( C), and further comprising the step of forming at least one selected from cement mortar, cement concrete and asphalt for paving on the coating (C) to form the layer (D). A forming method is provided.

Furthermore, in a fourth aspect of the present invention, a coating (A) made of a polyurea resin is formed by a spray method, and at least one selected from urethane resin and vinyl resin is formed on the coating (A). A method for forming a composite coating, comprising a step of forming a coating (G) by applying one kind of primer and then forming a coating (A) made of polyurea resin on the coating (G) by a spray method. It is provided.

The present invention provides, as a structure including the composite coating film of the first aspect, a coating film (A) made of a polyurea resin on the surface and a coating film made of a urethane resin formed on the coating film (A). (B), a coating (C) made of an epoxy resin formed on the coating (B), and at least one selected from cement mortar, cement concrete and asphalt for paving formed on the coating (C). And a layer (D) consisting of

The present invention also provides, as a structure including the coating of the second aspect, a coating (A) made of polyurea resin on the surface and a urethane resin formed on the coating (A). At least one selected from a coating (B), a coating (C) made of an epoxy resin formed on the coating (B), and cement mortar, cement concrete and asphalt for paving formed on the coating (C). It is intended to provide a composite coating structure having a seed layer (D).

Furthermore, the present invention provides, as a structure containing the coating of the third aspect, a coating (F) comprising at least one selected from an epoxy resin and a urethane resin on the surface, and a coating (F) on the coating. A film (A) made of polyurea resin formed on the film, a film (B) made of a urethane resin formed on the film (A), and a film made of an epoxy resin formed on the film (B). The present invention provides a composite coating structure having (C) and a layer (D) formed on the coating (C) and comprising at least one selected from cement mortar, cement concrete and asphalt for paving.

Furthermore, the present invention provides, as a structure including the coating of the fourth aspect, a coating (A) made of polyurea resin on the surface, and a urethane resin formed on the coating (A). A composite coating structure having a coating (G) composed of at least one primer selected from vinyl resins, and a coating (A) composed of a polyurea resin formed on the coating (G). is there.

[0016]

DETAILED DESCRIPTION OF THE INVENTION The method for forming a composite coating film of the present invention (hereinafter referred to as "the method of the present invention") and the composite coating structure (hereinafter referred to as "the structure of the present invention") will be described in detail below. explain.

The method of the present invention basically comprises a step of forming a coating film (A) made of a polyurea resin on the surface of a structure, and a composite coating film having the coating film (A) as an essential element is formed. Is the way.

The strength of the coating (A) is required to have a tensile strength of 9.8 MPa or more and an elongation at break of 100% or more in order to maintain the resistance to the shearing force applied to the structure and the crack followability of the structure. To be done. Particularly in the case of a concrete structure, a polyurea elastomer having a characteristic of elongation at break of 200% or more is preferable.

In the present invention, the structure forming the coating film (A) is a structure which is required to have anticorrosion, waterproofing, chemical resistance, etc., as long as it can form a coating film, and is particularly limited. Not done. For example, bridge overpass, bridge pier, bridge floor,
Underground structures such as buildings and condominiums and roofs and outer walls, bottom and inner walls and outer walls of excavation tunnels such as subways and roads, floors of factories and station passages, water reservoirs, drainage ponds, waterways, water treatment tanks, revetments Concrete structures such as walls and piers, cement mortar, cement-made or steel-made or plastic structures made of polymer cement and the like can be mentioned.

Further, in the present invention, a method of forming a composite coating on the surface of a concrete molded article by the method of the present invention using a formwork panel for concrete molding,
Bridge elevated roads, bridge piers, floor slabs, underground structures and outer walls such as buildings and apartments, inner and outer walls of excavation tunnels such as subways and roads, water reservoirs, drainage ponds, waterways, water treatment tanks, seawalls, It is preferably used for forming structures such as jetty. When this formwork panel is used, in the step of forming the coating film (A) without adhering it, the surface of the frame panel is coated with a release agent such as a silicone-based or fluorine-based compound,
Alternatively, it is preferable to perform a treatment such as sticking a film having good releasability such as polyethylene or polypropylene.

In the step of forming the coating film (A) on the surface of the structure in the method of the present invention, a primer made of at least one resin selected from epoxy resin and urethane resin is applied prior to the formation of the coating film (A). It is preferable to form the coating film (F) in order to reinforce the surface of the structure and increase the adhesive force between the structure and the coating film (A). In particular, when the coating (A) is formed on the surface of a structure such as a cement or steel structure,
It is suitable. Examples of the primer composed of at least one resin selected from the epoxy resin and the urethane resin include organic solvent type epoxy resin type primer, organic solvent type urethane resin type primer and emulsion type epoxy primer.

The epoxy resin used as the primer is a resin having two or more epoxy groups in one molecule, a reactive diluent having one or more epoxy groups in one molecule, and a modifier added if necessary. A main agent consisting of
It is composed of a composition containing a curing agent as a basic component.

Examples of the resin having two or more epoxy groups in one molecule include condensation products of bisphenols such as bisphenol A, bisphenol AD and bisphenol F with epichlorohydrin, and novolaks obtained from phenols and formalin. And an epichlorohydrin condensation product, an addition reaction product of the condensation product with an amine having a polyethylene glycol chain and having a molecular weight of 700 to 1500, and the like.

As the reactive diluent having one or more epoxy groups in one molecule, for example, monoglycidyl ether such as n-butyl glycidyl ether produced from alcohols having 4 or more carbon atoms, 1,6 -Polyfunctional glycidyl ethers such as hexanediol diglycidyl ether, phenyl glycidyl ether produced from phenols and γ-glycidoxypropyltrimethoxysilane, and the like. These are used to reduce viscosity and impart flexibility. It is added as needed for the purpose.

Further, examples of the modifier include a material for emulsifying a resin such as chroman, indene, and dicyclopentadiene, and a polyoxyalkylene amine composed of ethylene oxide and propylene oxide.

Further, as the curing agent, for example, a chain aliphatic polyamine such as polyethylene polyamine, polyoxyalkylene polyamine or polymethylene diamine,
Alicyclic polyamines such as menthenediamine, norbornenediamine and isophoronediamine, aliphatic aromatic amines such as xylylenediamine, and monoglycidyl such as n-butyl glycidyl ether produced from these polyamines and alcohols having 4 or more carbon atoms. Synthesized by addition reaction with ether, polyfunctional glycidyl ether such as 1,6-hexanediol diglycidyl ether, phenyl glycidyl ether produced from phenols, or epoxy resin such as diglycidyl ether produced from bisphenols Or a derivative synthesized by an addition reaction with acrylonitrile, or a Mannich reaction from formalin and phenol, or a condensation reaction with a fatty acid. And the like. These may be used alone or in combination of two or more.

Particularly, in view of excellent workability in coating work for forming the coating (F), the above-mentioned resin having two or more epoxy groups in one molecule and one or more epoxy groups in one molecule. A coating solution prepared by diluting an epoxy resin composition having a base component consisting of a reactive diluent having it and a modifier added if necessary, and a curing agent with a solvent, and an emulsifier for the epoxy resin composition. Or a coating solution obtained by mixing a polyamine with an epoxy group-containing self-emulsifying resin obtained by adding polyoxyalkyleneamine to a condensation product of bisphenols and epichlorohydrin, and a coating solution obtained by mixing with a polyamine. Is effective. Examples of the epoxy group-containing self-emulsifying resin include polyoxyalkylene amine 1 having a molecular weight of 900 to 1100 per 100 parts by weight of a condensation product of a bisphenol and epichlorohydrin.
The thing which added 0 weight part etc. is mentioned. Further, as the polyamine, a polyamine having a water concentration of 10 to 80% by weight, and preferably 20 to 60% by weight when turbidity occurs when mixed with water, is useful.

In the present invention, the composition used as a primer for forming the coating (F) is an epoxy resin composition diluted with a solvent in the range of 70% or less when the structure is a steel structure. When the structure is a concrete product, a water-dispersed epoxy resin is suitable.

The urethane resin used as a primer for forming the coating film (F) is a polyisocyanate and a polyol having two or more hydroxyl groups in one molecule.
It is made by reacting with Le. These are prepolymers, which are reaction products of polyisocyanate and one or more kinds of polyols, and are moisture-curing one-component urethane resins containing isocyanate residues, or polyisocyanates and polyols. It is used as an organic solvent type primer which is a reaction product of a two-liquid type urethane resin of a prepolymer having one or more isocyanate groups in one molecule and a polyol.

Examples of the polyisocyanate include isophorone diisocyanate, 1,6,11-undecane triisocyanate, xylylene diisocyanate, cyclohexane 1,4-diisocyanate and 4.4. '-Dicyclohexyl methane diisocyanate, 1,8-diisocyanate-4-isocyanate tetramethylxylene diisocyanate, 3,3'-dimethyl-4,4'-
Dicyclohexylmethane diisocyanate, 1,6-hexamethylene diisocyanate, 4,4'-diphenylmethane diisocyanate, tetramethylxylylene diisocyanate, tolylene diisocyanate and the like can be mentioned. These may be used alone or in combination of two or more.

Examples of the polyol include polyethylene ether glycol, polypropylene ether glycol, polytetramethylene ether glycol, and other polyether polyols, and polyethylene adipate glycol.
Polyesterpolyol such as polyethylene propylene adipate glycol, polybutylene adipate glycol, polyhexamethylene adipate glycol, polycaprolactone glycol, acrylic polyol, as a chain extender , Low molecular weight glycols such as aliphatic, aromatic and heterocyclic compounds, triols such as trimethylolpropane, amino alcohols such as ethanolamine,
Other examples include polyols having a high OH value such as sucrose, and these may be used alone or in combination of two or more.

Further, this urethane resin is used in combination with an appropriate amount of a catalyst for controlling the dry curing reaction. As the catalyst to be used, for example, one or more selected from tertiary amines such as triethylenediamine, triethylamine and tetramethylbutanediamine, metal compounds such as dibutyltin dilaurate and tin octate, and the like are used.

In the present invention, the coating amount of the coating (F) is
50-200g / m as a dry film ^TwoDegree and preferred
50 to 150 g / m^TwoIt is a degree. Also, the film
(F) is a pin when the foundation of the structure is concrete.
In order to prevent defects such as holes in advance, divide into 2 or more times
It is preferable to form the layers by coating. Furthermore, epoxy tree
Apply a primer made of grease and / or urethane resin
After coating, form a coating (A) made of polyurea resin
It takes a long time to secure the strength between the coating (F) and the coating (A)
It is important to adhere to the
From the dry-to-touch state defined in JIS K5400
Form the film (B) before the dry and cured state
Is preferred. Epoxy resin and / or Ure
After the tongue resin is completely cured, the reaction point with polyurea
May be lacking and cause problems with integrity (adhesion)
Is not preferable.

In the present invention, the coating film (F), if necessary, zinc white, ultramarine, carbon black, cadmium red, cobalt green, cobalt violet, cobalt blue, chromium oxide green, titanium oxide, cerulean blue, Coloring pigments such as titanium yellow, Prussian blue, Mars violet, red iron oxide, permanent red, Hansa yellow, phthalocyanine green, phthalocyanine blue, benzidine yellow, lake red, alumina, kaolin, activated carbon,
Activated clay, glass balloon, glass beads, glass flakes, glass powder, graphite, diatomaceous earth, acid clay,
An extender pigment such as silica, zirconia, aluminum hydroxide, slag, zeolite, talc, calcium carbonate, magnesium carbonate, titania, dolomite, bentonite, mica, magnesia, montmorillonite, barium sulfate can be blended.

In the present invention, the coating (F) is formed by applying an organic solvent type primer comprising at least one resin selected from the above epoxy resin and urethane resin by using a brush, roller brush or the like, or by spraying. It can be carried out by applying it to the surface of the structure by a method such as applying it by painting and drying and curing.

Film (A) of the composite film formed by the present invention
As the polyurea resin forming the, a first component comprising the following component (1) and / or (2), a catalyst used as necessary, and a second component comprising the component (3): A polyurea elastomer obtained by mixing and reacting (1) 100 to 500 parts by weight of amine-terminated polyether polyamine in which an amino group is bonded to a secondary carbon atom with respect to 100 parts by weight of amine-terminated chain extender (2) primary alcohol and / or secondary alcohol-terminated polyamine 0 to 500 parts by weight of ether polyol and 0 to 3 parts by weight of catalyst (3) Isocyanate prepolymer

Examples of the amine terminal chain extender (1) include 1-methyl-3,5-diethyl-2,4-
Diaminobenzene, 1-methyl-3,5-diethyl-
2,6-diaminobenzene, 1,3,5-triethyl-
2,6-diaminobenzene, 3,3 ', 5,5'-tetraethyl-4,4'-diaminodiphenyl-methane,
Examples thereof include N, N'-bis (t-butyl) ethylenediamine and di (methylthio) toluenediamine. These amine terminal chain extenders may be used alone or in combination of two or more.

The amine-terminated polyether polyamine (1) is, for example, a polyether obtained by reacting a lower alkylene oxide such as ethylene oxide, propylene oxide, butylene oxide or a mixture thereof with a suitable polymerization initiator. It is obtained by substituting an amino group by reacting a hydroxyl group present at the terminal of the group with ammonia. For example, it is obtained by a reductive amination reaction of a hydroxyl group bonded to a terminal secondary carbon of polypropylene glycol having ethylene glycol as a nucleus. As a specific example of this amine-terminated polyether polyamine, a molecular weight of 400 to 5 obtained by reductive amination of a hydroxyl group bonded to a terminal secondary carbon of polypropylene triol having a diamine having an average molecular weight of 200 to 4100, trimethylolpropane or glycerin as a nucleus
Examples include 500 triamines and the like, and these may be used alone or in combination of two or more.

(2) Examples of the polyether polyol having a primary alcohol and / or secondary alcohol terminal include ethylene glycol, propylene glycol, glycerin, hexanetriol, trimethylolpropane, polyethylene ether glycol, polypropylene ether glycol. Polyether polyol such as polytetramethylene ether glycol, polyethylene adipate glycol, polyethylene propylene adipate glycol, polybutylene adipate glycol, polyhexamethylene adipate glycol, polyester polyol such as polycaprolactone glycol, acrylic polyol, phenol resin polyol, epoxy polyol, Butadiene polyol, polyester-polyether Polyols, polycarbonate polyols, include vegetable oils, which are also used in combination of two or more species.

The isocyanate prepolymer (3) is a prepolymer having one or more isocyanate groups in one molecule, which is a reaction product of a polyisocyanate and an active hydrogen compound. Further, the isocyanate prepolymer may contain a polyisocyanate monomer that has not reacted with the active hydrogen compound. The active hydrogen compound is, but not limited to, a polyol, a polyamine, or a mixture thereof. For example, a reaction product of a polyisocyanate and a polyol and / or an amine-terminated polyether, wherein one isocyanate group of the polyisocyanate and 0.02 to 0.3 hydroxyl groups of the polyol or one of the amine-terminated polyethers A reaction product having a composition of 0.02 to 0.3 amino groups, or a total of 0.02 to 0.3 amino groups of a hydroxyl group of a polyol and an amino group of an amine-terminated polyether;
The viscosity at ℃ is 6000 mPa · S or less, preferably 3000 mPa · S or less. Examples of the polyisocyanate and the polyol include the same ones as exemplified for the urethane resin used as the component of the coating film (F).

Specific examples of the polyisocyanate include isophorone diisocyanate (IPDI), 1,6,11.
-Undecane triisocyanate, m-xylylene diisocyanate (MXDI), 1,8-diisocyanate-4-isocyanatomethyloctane, bis (4-isocyanatocyclohexyl) methane (hydrogenated MDI), hexamethylene-1,6- Diisocyanate (HDI),
4,4'-diphenylmethane diisocyanate (MD
I), tetramethylxylylene diisocyanate (TM)
XDI), 2,4-tolylene diisocyanate (TD
I), norbonene diisocyanate and their carbodiimide-modified products, buret-modified products, uretonimine-modified products, and the like. These may be used alone or in combination of two or more.

In this polyurea elastomer, the first
When the component is a polyamine, the reaction between the amine and the isocyanate is generally very quick, and it is not necessary to use a catalyst. Since this reaction is extremely fast, it is necessary to select an efficient high-speed mixing method and a component system having a reaction rate suitable for sprayability and film-forming properties. The two components are moisture,
The polyurea elastomer that is not affected by moisture and cures even at a low temperature of 0 ° C. or lower has the characteristics of being tough and elastic, and having excellent chemical resistance, heat resistance, and water resistance. Also, when used in an environment that is not exposed to high temperature and high humidity without being affected by moisture or moisture, particularly when high strength is not required and low cost is required,
A combination in which the first component contains the component (B) and a catalyst is advantageous. (2) primary alcohol in the first component and /
Alternatively, when a secondary alcohol-terminated polyether polyol is contained, its content is 0 to 500 parts by weight, preferably 1 part by weight based on 100 parts by weight of the amine-terminated chain extender.
It is a proportion of 0 to 300 parts by weight. If it exceeds 500 parts by weight, the elongation at break is improved, but the strength is remarkably reduced, which is not preferable. Further, as a catalyst which is used as necessary and accelerates the curing reaction of the polyurea elastomer, for example, known triethylenediamine, N, N, N ', N'
Tertiary amines such as tetramethylhexamethylenediamine, metal compounds such as dibutyltin dilaurate, dibutyltin diacetate and / or mixtures thereof.

In the method of the present invention, the coating (A)
US Patent No. 4 as a polyurea resin used for the formation of
No. 379729, No. 443,067 and No. 44
Amine-terminated polyethers described in US Pat.
Aromatic diamine chain extenders, polyisocyanates made from polyisocyanates and polyols may be quasi-prepolymers in which some of the isocyanate groups remain unreacted, using polyurea elastomers made using aromatic polyisocyanates May be.

In the present invention, the coating film (A) may optionally contain conventionally known ultraviolet absorbers, radical scavengers, colorants, extender pigments, plasticizers, flame retardants, additives and the like. It can be blended.

As the ultraviolet absorber, for example, RUVA
-93 (Otsuka Chemical Co., Ltd.), Tinuvin P, Tinuvin 14
4, Tinuvin 320 (manufactured by Ciba-Geigy), HCB (manufactured by Dow), and Sumisorb 100 (manufactured by Sumitomo Chemical).

Examples of the radical scavenger include Simasolve 622, Simasolve 944 and Irganox 101.
0, Irganox 245 (manufactured by Ciba Geigy).

Examples of colorants include zinc white, ultramarine, carbon black, cadmium red, cobalt green, cobalt violet, cobalt blue, chromium oxide green, titanium oxide, cerulean blue, titanium yellow, Prussian blue, and mars violet. , Red iron oxide, permanent red, hansa yellow, phthalocyanine green, phthalocyanine blue, benzidine yellow, lake red.

Examples of extender pigments include alumina, kaolin, activated carbon, activated clay, glass balloons, glass beads, glass flakes, glass powder, graphite, diatomaceous earth, acid clay, silica, zirconia, aluminum hydroxide, slag, zeolite, Talc, calcium carbonate,
Examples thereof include magnesium carbonate, titania, dolomite, bentonite, mica, magnesia, montmorillonite, and barium sulfate. Further, examples of the plasticizer include dioctyl phthalate and dibutyl phthalate, and examples of the flame retardant include tris-dichloropropyl phosphate (manufactured by Daihachi Chemical Co., Ltd.).

These compounding agents which are compounded as necessary are used by being contained in the first component or the second component for forming the polyurea resin.

In the method of the present invention, the step of forming the coating film (A) by the spray method is not particularly limited as long as it is a method in which the polyurea resin material can be spray-coated. For example, when forming a coating film made of a polyurea elastomer composed of the first component and the second component, the proportion of the first component and the second component is measured by a proportioner.
It is formed by adjusting the pressure and heating, supplying it to the inside of the spray gun, directly colliding it inside the spray gun, and spraying it on the surface of the structure or the like while reacting. When the component (2) is contained in the first component and the reaction rate is relatively slow, it is also possible to carry out mixing with a stirring mixer or a static mixer before supplying to the spray gun.

In the method of the present invention, when a layer (D) comprising at least one selected from cement mortar, cement concrete and asphalt for paving is formed on the coating film (A), it is formed on the coating film (A). Is coated with an organic solvent type primer composed of at least one resin selected from urethane resin and vinyl resin to form a film (B), and then a primer composed of an epoxy resin is applied on the film (B). When the layer (D) is formed after the coating (C) is formed by the coating, the cured coating (A) and the coating (B), the coating (B) and the coating (C), and the coating (C) and the layer (D). Since the adhesiveness between the two is good, the coating (A) and the layer (D) can be directly integrated indirectly via the coating (B) and the coating (C).
In particular, as the coating (B), a coating formed by applying a primer made of urethane resin is preferable because the adhesiveness with the polyurea resin is particularly good.

The vinyl resin used as a primer for forming the coating (B) is, for example, polyvinyl chloride,
Examples thereof include polyvinyl acetate and copolymers thereof.

As the urethane resin used for forming the coating (B), for example, (a) a primary alcohol and / or a secondary alcohol-terminated polyol, and a molecular end formed by reacting polyisocyanate A one-component organic solvent type urethane resin composition which is cured by moisture and which contains a main component comprising a polyurethane prepolymer having an isocyanate residue and (b) an organic solvent, or a first component liquid comprising a polyol, a catalyst and an organic solvent. And a second component liquid composed of polyisocyanate and an organic solvent in a predetermined ratio before use, such as a two-component urethane resin composition.

The one-component organic solvent-type urethane resin composition is, for example, a reaction product of a polyether polyol and 4,4'-diphenylmethane diisocyanate in the presence of a dibutyltin dilaurate catalyst and has an isocyanate residue. A composition in which a polyurethane prepolymer is dissolved in an organic solvent may be mentioned.

As the two-component urethane resin composition, for example, as the first component liquid, a solution of an acrylic polyol which is a reaction product of methyl acrylate, styrene and 2-hydroxy methacrylate, a solution of polycaprolactone polyol, or A solution of a polyester polyol which is a reaction product of neopentyl glycol, adipic acid and isophthalic acid, and an adduct of trimethylolpropane such as toluene diisocyanate, m-xylylene diisocyanate and hexamethylene-1,6-diisocyanate as a second component liquid. , A burette, or a solution of isocyanurate.

The organic solvent for urethane resin is not particularly limited as long as it dissolves the urethane resin. For example, an organic solvent containing at least one selected from ethyl acetate, butyl acetate, methyl ethyl ketone, methyl isobutyl ketone, toluene, and xylene is preferable because it enhances the adhesion between the urethane resin and the coating (A).

In the present invention, these urethane resin primers may be used alone or in combination of two or more as an organic solvent type primer.

In the present invention, when a structure having a layer (D) selected from cement mortar, concrete or asphalt for paving on the coating (A) made of a polyurea elastomer is produced, After forming a coating film (B) by applying a primer made of at least one selected from urethane resin and vinyl resin, and further forming a coating film (C) by applying a primer made of epoxy resin on the upper layer, the upper layer It is preferable to form a layer (D) made of cement mortar, concrete or asphalt for paving on the above because the adhesion between the formed layers becomes stronger.

In the present invention, the epoxy resin used as a primer for forming the coating film (C) includes an epoxy resin having one or more epoxy groups in one molecule and an epoxy resin curing agent. The epoxy resin has an epoxy equivalent (g / epoxy group: hereinafter the same) of 165 to 5
50 bisphenol A type epoxy resin, bisphenol AD type epoxy resin, bisphenol F type epoxy resin, epoxy equivalent 170-250 novolac type epoxy resin, epoxy equivalent 160-350 phthalic acid diglycidyl ester, epoxy equivalent Is 100
At least one selected from glycidylamines of about 250 can be used. Among these, bisphenol A type epoxy resin and bisphenol A which are liquid at 25 ° C.
D-type epoxy resin and bisphenol F-type epoxy resin are suitable.

The epoxy resin has 11 carbon atoms.
To 14 kinds of low viscosity epoxy resins having one or more epoxy groups in one molecule, such as glycidyl ether of alcohol, 1,6-hexanediol diglycidyl ether, and trimethylolpropane triglycidyl ether.
It can be used together for the purpose of adjusting the viscosity of the epoxy resin or imparting flexibility.

Examples of the epoxy resin curing agent include chain aliphatic polyamines such as polyethylene polyamine, polyalkylene ether polyamine and polymethylene polyamine, cyclic aliphatic polyamines such as N-aminoethylpiperazine and isophoronediamine, and xylylenediamine. Of the polyaromatic amine, the amidoamine composed of the polyamine and the fatty acid, the polyamidoamine composed of the polyamine and the dimer acid, and the polyamine composed of at least one modified polyamine derived from the polyamine are room temperature curable. preferable. In particular, a curing agent containing 20% or more, preferably 50% or more, of a polyamidoamine obtained by dehydration condensation of polyethylene polyamine and dimer acid is preferable because it has excellent adhesiveness between the coating (B) and the layer (D). is there.

In the present invention, the coating film (C) may be mixed with conventionally known colorants, extender pigments, additives and the like, if necessary.

Examples of the colorant include zinc white, ultramarine, carbon black, cadmium red, cobalt green, cobalt violet, cobalt blue, chromium oxide green, titanium oxide, cerulean blue, titanium yellow, Prussian blue, and mars violet. , Red iron oxide, permanent red, hansa yellow, phthalocyanine green, phthalocyanine blue, benzidine yellow, lake red.

Examples of extender pigments include alumina, kaolin, activated carbon, activated clay, glass balloon, glass beads, glass flakes, glass powder, graphite, diatomaceous earth, acid clay, silica, zirconia, aluminum hydroxide, slag, zeolite, Talc, calcium carbonate,
Examples thereof include magnesium carbonate, titania, dolomite, bentonite, mica, magnesia, montmorillonite, and barium sulfate.

In the present invention, the epoxy resin primer is used as a solventless primer, an organic solvent primer or an aqueous primer.

At the time of forming the coating (C), a method of mixing aggregates such as sand and silica sand with a primer made of epoxy resin, or applying these aggregates when the epoxy resin primer is applied. By forming irregularities on the surface of the coating film (C) by such a method, the adhesion area with cement mortar, cement concrete, asphalt for paving, etc. can be increased, and at the same time, the adhesion strength due to the anchoring effect can be improved.

The coating amount of the coating (C) is usually 10
0 to 500 g / m ² or so, preferably 150 to 3
It is about 00 g / m ² .

In the cement mortar, the layer (D) made of cement mortar, concrete or asphalt for paving is, for example, applied to protect the coating (A) from molten iron such as welding during construction or falling objects. In the case of concrete, it is, for example, a structural frame, and in the case of asphalt, it is, for example, the pavement of a bridge floor or an elevated road.

In the present invention, when the coating (A) made of polyurea resin or the coating made of polyurethane resin or the like is further formed on the coating (A), the polyurea resin or polyurethane resin is simply overlaid. When applied, at room temperature, if the time between them is 3 hours or less, sufficient integrity can be exhibited between both coatings, but more than that, that is, a new polyurea resin coating is newly added to the coating. Covering with a urea resin may result in insufficient integrity and delamination. Therefore, in order to sufficiently adhere the coatings (A) made of the polyurea resin to each other and integrate them, at least one resin selected from urethane resin and vinyl resin is formed on the lower coating (A). It is preferable to apply a primer to form the coating (G) and then form the coating (A) made of a polyurea resin.

The urethane resin or vinyl resin used as a primer for forming the coating film (G) may be the same as those used for forming the coating film (B). In particular, as the vinyl resin, polyvinyl chloride resin 1
A resin obtained by adding 5 to 30 parts by weight of a phthalic acid ester to 00 parts by weight is dissolved in a mixed solvent of methyl isobutyl ketone, xylene and butyl acetate to form a film (A).
This is preferable because they can firmly adhere to each other.

The thickness of this coating (G) is usually 10 to 1
The thickness is about 00 μm, preferably about 20 to 50 μm.

Further, in the present invention, in order to protect the coating film made of polyurea resin or polyurethane from sunlight on the upper layer such as the coating film (A) made of polyurea resin or the coating film made of polyurethane resin, to improve weather resistance. It is preferable to apply a light-shielding paint to the above to form a film. Examples of light-shielding paints used include oil paints, alkyd resin paints, unsaturated polyester resin paints, urethane resin paints, acrylic resin paints, vinyl resin paints, etc. Among them, appearance stability, adhesion with polyurethane resin From the viewpoint of properties, vinyl resin paints and non-yellowing urethane resin paints are preferable.

As the light-shielding coating material, powders of aluminum, zinc, iron, stainless steel, etc., carbon black, chromium oxide green, titanium oxide, red iron oxide, etc., having a particle size of 0.1 to 500 μm, for imparting light-shielding properties. Particularly preferred is a coating material containing the above powder or an ultraviolet absorber.

The coating amount of the light-shielding coating material for forming the coating (C) is usually about 100 to 300 g / m ² ,
It is preferably about 150 to 250 g / m ² .

[0075]

In the present invention, a specific organic solvent type primer is applied to a coating (A) formed of a polyurea elastomer formed by adhering or not adhering to a structure or the like to form a coating (B) or a coating. (G), and by coating an epoxy resin-based primer on the coating (B) to form the coating (C), the concrete or asphalt layer (D) to be placed later and the waterproofness and corrosion resistance Coated film (A)
By firmly adhering and to be integrated, a structure having excellent durability can be obtained. In addition, when the coating (A) is spliced, repaired, or repeatedly coated to increase the thickness of the coating (A), the coating (G) is formed on the coating (A) so that the coating (A) and the coating are spliced together. Alternatively, it is possible to obtain a waterproof and anticorrosive coating in which the overcoated coating (A) is firmly adhered and integrated.

Further, in a structure used in an environment where a coating film made of polyurea resin or polyurethane resin is exposed to sunlight, a coating film-forming resin coating material containing a light-shielding material is applied to form a coating film. As a result, the durability of the coating film made of polyurea resin or polyurethane resin can be maintained for a long time.

[0077]

EXAMPLES Hereinafter, according to Examples and Comparative Examples of the present invention,
The present invention will be described more specifically. However, the present invention is not limited to the examples and comparative examples.

(Example 1) A 300 x 300 x 60 mm concrete flat plate was cut with a diamond cutter, and the upper surface of a test concrete plate (100 x 100 x 60 mm) was roughened by sandblasting. Next, 100 parts by weight of bisphenol A type epoxy resin (epoxy equivalent: 189 g / eq) was added to the surface of this test concrete plate, and methoxypoly (oxyethylene / oxypropylene) -2-propylamine (average molecular weight: 1000) 1
Resin added with 0 parts by weight (epoxy equivalent: 216) 10
0 parts by weight and epoxy-modified m-XDA (active hydrogen equivalent:
95g / eq, solubility in water: 32g / 100g)
A two-liquid mixed emulsion primer prepared by mixing 43 parts by weight and 143 parts by weight of ion-exchanged water was applied twice with a brush to form a film (F).

Then, an amine-terminated polyether triamine prepared by reductive amination of a polyol (average molecular weight: 5000, trade name: Jeffamine T-500).
0) An amine-terminated polyetherdiamine prepared by reductive amination of a polyol with respect to 100 parts by weight (average molecular weight: 2000, trade name: Jeffamine D-20)
00) 66.7 parts by weight, diethyltoluenediamine 64.6 parts by weight, and N, N′-diethylaminodiphenylmethane 27.1 parts by weight are added and mixed with stirring, and 5 parts by weight of rutile type titanium oxide is kneaded into this white. A first component liquid colored in was prepared. Further, polypropylene glycol (average molecular weight: 200) was added to 100 parts by weight of carbodiimide-modified methylenediphenyldiisocyanate.
0) 66.7 parts by weight was reacted, and 0.1 part by weight of phthalocyanine blue was kneaded into this to prepare a second component liquid colored blue.

Each of these undiluted solutions of polyurea elastomer consisting of the first component liquid and the second component liquid was supplied to a spray gun connected to a high-pressure supply device (H-2000; manufactured by GUSMER), and concrete plates for test were supplied. Was spray applied to form a coating (A) having a thickness of 1 mm.

Then, on the surface of the coating (A), a urethane prepolymer obtained by reacting TDI with polypropylene glycol (average molecular weight: 2000) in the presence of dibutyltin dilaurate, toluene, methyl ethyl ketone and ethyl acetate. A moisture-curable urethane primer (nonvolatile content: 35%, NCO content: 3.5%) was applied at 200 g / m ² to form a film (B). After drying, an epoxy resin composed of a bisphenol A type epoxy resin and 1,6-hexanediol diglycidyl ether (epoxy equivalent: 180, viscosity 950 mPa · s / 2
5 parts by weight and 100 parts by weight of polyamine amine (trade name: Versamide 140) and a two-component mixed epoxy composed of a curing agent consisting of 60 parts by weight of a mixed solution of isopropyl alcohol and toluene containing 75% of polyamide amine (trade name: Versamide 140) are mixed by a predetermined method. Then, 200 g / m ^{2 was} applied onto the coating (B) to form a coating (C).

Then, a length of 70 m is applied to a part of the film (C).
Cement mortar (Portland Cement: Toyoura sand: water = 20 parts by weight): 4 with a mold of m × width 70 mm × height 60 mm placed and sealing the contact with the coating
(0 parts by weight: 13 parts by weight) was cast and cured for 7 days. After curing, the mold was removed to obtain a test sample of the composite coating structure in which the cement mortar layer (D) was formed on the coatings (A), (B) and (C).

The bond strength between the coating (A) and the layer (D) was measured by the compression shear adhesion test. In the test, a test piece is set up, a concrete plate containing the coating (A) is fixed to a jig,
Block (wooden: 50 mm x 60 mm) on top of layer (D)
(× 70 mm) was placed and the measurement was carried out according to the method of JISK6852.

Separately, a stainless steel plate (500 mm × 500 mm) whose surface is release-treated with a fluorine-based compound is used.
X 4 mm) was prepared, and a coating (A) having a thickness of 1 mm was formed on the surface by the above method. This film was removed from the stainless steel plate to obtain a free film (A), and JISK6301 was used.
The tensile strength of the coating film (A) was measured in accordance with. The results are shown in Table 1. In addition, the characteristics of this coating (A) alone are
Tested according to SA6021 (Roof coating waterproof material).
Table 2 shows the results.

(Example 2) The polyurea elastomer of Example 1 was replaced by dibutyltin by replacing the amine-terminated polyether in the first component with an alcohol-terminated polyether triol and an alcohol-terminated polyether diol each having an approximately equal average molecular weight. A composite coated structure test body was obtained in the same manner as in Example 1 except that the polyurea elastomer to which was added was changed to a polyurea elastomer.
The adhesion strength between the coating (A) and the layer (D) was measured. Further, in the same manner as in Example 1, a single coating film (A) was prepared and its tensile strength was measured. The results are shown in Table 1.

Example 3 A composite coating covering structure was obtained in the same manner as in Example 1 except that the primer coating (F) was not formed on the surface of the test concrete plate, and compression shearing was performed. Coating (A) and layer (D) by adhesion test
The adhesive strength between and was measured. The results are shown in Table 1.

(Comparative Example 1) In the same manner as in Example 1, a coating (A) was formed on the surface of the test concrete plate. Then
In the same manner as in Example 1, a mold was placed on a part of the coating film (A), cement mortar was directly cast, and cured to obtain a test piece in which the layer (D) was formed. Similarly, a compression shear adhesion test was performed to measure the adhesive strength between the coating (A) and the layer (D). The results are shown in Table 1.

Comparative Example 2 In the same manner as in Example 2, the coating (A) was formed directly on the surface of the test concrete plate. Then, in the same manner as in Example 1, a mold was placed on a part of this coating (A), cement mortar was directly cast and cured to obtain a test piece in which a layer (D) was formed. Similarly, a compression shear adhesion test was performed to measure the adhesion strength between the coating (A) and the layer (D). The results are shown in Table 1.

Comparative Example 3 An asphalt roofing sheet (tensile strength of 2.9 MPa, JISA 6013; commercially available product) was fused to a test concrete plate treated in the same manner as in Example 1 to form a film. Then, Example 1
Similarly to the above, a mold is placed on a part of this coating, cement mortar is directly cast and cured to obtain a test piece on which a layer (D) is formed, and a compression shear adhesion test is performed as in Example 1. The adhesive strength between the coating (A) and the layer (D) was measured. The results are shown in Table 1.

Example 4 A wooden frame (inside dimension: 800 × 1700 × 50 mm) was prepared by using plywood having a thickness of about 25 mm. A 1 mm thick coating (A) made of polyurea elastomer was formed on the inside of the wooden frame in the same manner as in Example 1. Then, a film (B) made of moisture-curable urethane was formed on the surface of this film, and a film (C) made of an epoxy resin and polyamidoamine was formed on the film (B) in the same manner as in Example 1. An asphalt for surface pavement having a thickness of about 70 mm is laid on the composite coating composed of the coatings (A), (B) and (C), and is compacted with a loader to form an asphalt layer (D) having a thickness of about 70 mm. A composite coating structure having was prepared.

The obtained composite coated structure was cut out with a cutter along with a wooden frame to obtain a test piece having dimensions of 100 × 100 × about 75 mm (bonding area of 10,000 mm 2). Next, the test piece was subjected to a compression shear adhesion test, and the adhesive strength between the coating (A) and the layer (D) was measured. Table 3 shows the results
Shown in

(Comparative Example 4) In the same manner as in Example 4, a coating (A) of polyurea elastomer having a thickness of 1 mm was formed on the inner side of the wooden frame. Then, a surface pavement asphalt having a thickness of about 70 mm is directly laid on the surface of the coating film (A) and pressed by a loader to produce a composite coating structure having an asphalt layer (D) having a thickness of about 50 mm. did.
The resulting composite coated structure was subjected to a compression shear adhesion test in the same manner as in Example 4 to measure the adhesive strength between the coating (A) and the layer (D). The results are shown in Table 3.

Example 5 A cement mortar board (70 × 70 ×) in which the surface relatance was removed by polishing with a wire brush
A coating (F) and a coating (A) were formed on one side of a test piece (20 mm; manufactured by Nippon Test Panel) in the same manner as in Example 1. The adhesive properties of the obtained coating film (A) were examined by preparing the following test pieces 1 to 5. (Test piece 1) After 2 hours from the production of the coating film (A), a 40 mm portion on one side of the coating film (A) was covered with a polyester film (manufactured by Toray; Lumirror) having a thickness of 50 μm, and the coating film (A) was coated again. The entire surface was formed with a thickness of 1 mm. (Test piece 2) About one of the other test pieces, after 3 days from the production of the coating film (A), a part of 40 mm on one side was covered with a polyester film in the same manner as in the test piece 1, and the coating film (A) was entirely overlaid again. It was formed with a thickness of 1 mm. (Test piece 3) Regarding one of the other test pieces, after 3 days from the production of the coating (A), a 40 mm portion on one side of the coating (A) was covered with a polyester film, and the remaining portion of the coating (A) was covered. A moisture-curable urethane primer was applied on the surface in the same manner as in Example 1 at 200 g / m ² and dried by touch with a finger to form a coating (B), and then the coating (A) was formed again with a thickness of 1 mm on the entire surface. . (Test piece 4) About one of the other test pieces, 3 days after the production of the coating film (A), the test piece was covered with a polyester film in the same manner as the test piece 1, and the remaining portion of the coating film (A) was coated with polycaprolactone. A polyester polyol prepared by dissolving a polyol in a mixed solvent of toluene, ethyl acetate, butyl acetate, and xylene, and toluene diisocyanate are reacted with trimethylolpropane to form a trinuclear product of a reaction product having a terminal isocyanate residue in an ethyl acetate solution (non-volatile). Min: 75%), a two-component mixed urethane was applied and dried by touch with a finger to form a film (B), and then a film (A) was formed again with a thickness of 1 mm on the entire surface. (Test piece 5)
About one of the other test pieces, after 3 days from the production of the coating film (A), it was covered with a polyester film in the same manner as the test piece 1,
A vinyl resin solution prepared by plasticizing 100 parts by weight of a polyvinyl chloride resin with 20 parts by weight of dioctyl phthalate and dissolving it in a mixed solvent of xylene and methyl isobutyl ketone is applied to the surface of the remaining coating (A) and dried by touch. After forming the coating film (B), the coating film (A) was formed again with a thickness of 1 mm on the entire surface.

Next, the test pieces 1 to 5 were left to stand for 3 days to be cured, and then the polyester film was removed from the coating formed on the upper layer thereof, and a free coating (A) was formed on a portion of 40 mm on one side and the other. Five kinds of test pieces including a coating in which the upper and lower coatings (A) were adhered to each other in a 30 mm portion were obtained.
For each of the test pieces 1 to 5, the free coating film (A) was bent 180 degrees, fixed to a jig, and tightened.
The first layer coating (A) and cement mortar are fixed to the other jig and tightened, and the upper and lower coatings (A) are used together with a tester (Tensilon; manufactured by Toyo Baldwin) for 180
The peeling test was performed to evaluate the adhesion state. Table 4 shows the results of evaluation based on the criteria shown below Table 3.

Example 6 A cement mortar plate (70 × 70 ×) in which the surface latance was removed by polishing with a wire brush
20 mm; manufactured by Nippon Test Panel Co., Ltd.) except that a polyurea elastomer material was used on one side in the same manner as in Example 2.
Test pieces 1 to 5 were prepared in exactly the same manner as in Example 5, and the adhesion state between the upper and lower coating films (A) was evaluated. The results are shown in Table 4.

(Embodiment 7) A cement mortar plate (150 × 70) in which the surface relatance was removed by polishing with a wire brush
× 20 mm: 100 parts by weight of an epoxy resin (epoxy equivalent: 180, viscosity 950 mPa · s / 25 ° C.) consisting of bisphenol A type epoxy and 1,6-hexanediol diglycidyl ether on the entire surface of (20 mm) manufactured by Nippon Test Panel Co., Ltd. A primer prepared by mixing 130 parts by weight of a 50% aqueous solution of modified polyamidoamine (trade name: Ancamide 360), 90 parts by weight of isopropyl alcohol, and 30 parts by weight of ion-exchanged water was applied to form a film (F). Thereafter, a coating film (A) having a thickness of 2 mm was further formed on the coating film (F) in the same manner as in Example 1 and a concrete plate was coated and wrapped around the coating film (F) to prepare a test body for an alkali resistance test and an acid resistance test. Obtained.

This test body was aged for 3 days and immersed in a 10% sulfuric acid aqueous solution and a saturated calcium hydroxide aqueous solution for three days each for 60 days to measure the adhesive strength. The adhesive strength is measured using a Kkenken adhesion tester after adhering a jig having an area of 40 mm x 40 mm to the coating (A), cutting off the coating (A) around the jig with an electric cutter did. Table 5 shows the results.

(Embodiment 8) A stainless steel plate (500 mm × 500 mm × 4 m) which has been release-treated with a fluorine compound.
A film (A) having a thickness of 2 mm was formed on the surface of m) in the same manner as in Example 1. This coating (A) was detached from the stainless steel plate to give a free coating (A), which was 150 mm x 7
It was cut to 0 mm. On the surface of the cut film (A),
In the same manner as in Example 1, the same moisture-curable urethane primer was applied at 200 g / m ² to form a coating (B), and then a two-component mixed epoxy was applied at 200 g / m ² to form a coating (C). After that, the coating (A) is molded into a mold (inner dimension 150
mm × 70 mm × height 25 mm), and then the coating (A) is set in the mold with the surface treated with the primer facing up, and cement mortar is placed on the coating (A) to make it 2
After curing for 1 day and demolding, a composite coating structure was obtained.

The composite coating structure thus obtained was subjected to an adhesion test, an acid resistance test and an alkali resistance test in accordance with the test method of the concrete corrosion protection guideline (draft) (June 1993: edited by the Japan Sewerage Agency). went. Table 6 shows the results. The adhesion test and the alkali resistance test were carried out using the composite coating structure body itself as a test body. In the acid resistance test, the side surface of the composite coating structure and the cement mortar surface were ground to adjust the base material, and 200 g of the above moisture-curable urethane primer was applied to these surfaces and the end of the coating film (A) of about 10 mm. / m ² was applied to obtain a test body coating (a) on the site coated with the primer and a thickness of 2 mm. Furthermore, as a reference, a test body was prepared in which a moisture-curable urethane primer and a coating (A) having a thickness of 2 mm were formed on one surface of a flexible plate, and a water permeability test was conducted. Table 6 shows the results.

[0100]

[0101]

[Table 1]

[0102]

[0103] Explanation of symbols ◎ ・ ・ ・ ・ Cohesive failure of coating (A) and / or coating (B) × ・ ・ ・ ・ Peeling of interface between coating (A) and coating (B) ○ ・ ・ ・ ・ Mixed with ◎ and ×

[0104]

[0105]

[0106]

According to the method of forming a coating film of the present invention, a composite coating film having excellent adhesion, acid resistance, alkali resistance, water permeability and the like can be obtained. In particular, a coating composed of a tough polyurea resin having corrosion resistance and waterproofness, and a concrete to be cast on it, because it can be an anticorrosion waterproof membrane coating structure firmly adhered as asphalt for paving, It is possible to obtain a structure having excellent durability.

The composite coating structure of the present invention is useful because it has the composite coating having the above-mentioned excellent properties.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kakutaro Kauchi 4-5-14 Nihonbashihonmachi, Chuo-ku, Tokyo San Techno Chemical Co., Ltd.

Claims (10)

[Claims] 1. A coating (A) made of a polyurea resin is formed by a spray method, a primer made of a urethane resin is applied on the coating (A) to form a coating (B), and then the coating is formed. An epoxy resin is applied onto (B) to form a coating (C), and at least one selected from cement mortar, cement concrete and asphalt for paving is placed on the coating (C). A method for forming a composite coating, comprising the step of forming layer (D). 2. A coating (A) made of polyurea resin is formed on the surface of the structure (E) by a spray method, and a primer made of urethane resin is applied onto the coating (A) to form a coating ( After forming B), an epoxy resin is applied on the coating (B) to form a coating (C), and further selected from cement mortar, cement concrete and asphalt for paving on the coating (C). At least 1
A method for forming a composite coating, which comprises a step of casting a seed to form a layer (D). 3. The surface of the structure (E) is coated with at least one primer selected from an epoxy resin and a urethane resin to form a film (F), and then a film (A) made of a polyurea resin is formed. It is formed by a spray method, a primer made of urethane resin is applied on the coating (A) to form a coating (B), and then an epoxy resin is applied on the coating (B) to form a coating (C And at least one selected from cement mortar, cement concrete and paving asphalt on the coating (C).
A method for forming a composite coating, which comprises a step of casting a seed to form a layer (D). 4. A coating (A) made of a polyurea resin is formed by a spray method, and at least one primer selected from urethane resin and vinyl resin is applied onto the coating (A) to form the coating (G). ) Is formed, the coating (G) is formed.
A method for forming a composite coating film, which comprises a step of forming a coating film (A) made of a polyurea resin on the above by a spray method. 5. A coating (A) comprising the polyurea resin,
2 of the combination of the first component consisting of the following (1) and the second component consisting of (3), or the combination of the first component consisting of the following (1) and (2) and the second component consisting of (3) 5. A mixture obtained by mixing and reacting seed components.
A method for forming a composite coating film according to any one of 1. (1) 100 to 500 parts by weight of amine-terminated polyether polyamine in which an amino group is bonded to a secondary carbon atom with respect to 100 parts by weight of amine-terminated chain extender (2) primary alcohol and / or secondary alcohol-terminated polyamine 0 to 500 parts by weight of ether polyol and 0 to 3 parts by weight of catalyst (3) Isocyanate prepolymer 6. A coating film (A) made of polyurea resin on the surface.
A coating (B) made of a urethane resin formed on the coating (A), a coating (C) made of an epoxy resin formed on the coating (B), and formed on the coating (C) And a layer (D) composed of at least one selected from cement mortar, cement concrete and asphalt for paving. 7. A coating film (A) made of polyurea resin on the surface.
A coating (B) made of a urethane resin formed on the coating (A), a coating (C) made of an epoxy resin formed on the coating (B), and formed on the coating (C) And a layer (D) comprising at least one selected from cement mortar, cement concrete and asphalt for paving. 8. A coating (F) made of at least one selected from an epoxy resin and a urethane resin on the surface, a coating (A) made of a polyurea resin formed on the coating (F), and the coating. A urethane resin coating (B) formed on (A), an epoxy resin coating (C) formed on the coating (B), and a cement mortar formed on the coating (C) , A composite coated structure having a layer (D) comprising at least one selected from cement concrete and asphalt for paving. 9. A coating film (A) made of polyurea resin on the surface.
A coating (G) formed on the coating (A) and containing at least one primer selected from urethane resin and vinyl resin; and a coating formed on the coating (G) and containing a polyurea resin. A composite coating structure having (A). 10. A coating (A) comprising the polyurea resin
Is a combination of a first component consisting of (1) below and a second component consisting of (3), or a combination of a first component consisting of (1) and (2) below and a second component consisting of (3) Of 2
7. A composition obtained by mixing and reacting various components.
10. The composite coating structure according to any one of 9 to 10. (1) 100 to 500 parts by weight of amine-terminated polyether polyamine in which an amino group is bonded to a secondary carbon atom with respect to 100 parts by weight of amine-terminated chain extender (2) primary alcohol and / or secondary alcohol-terminated polyamine 0 to 500 parts by weight of ether polyol and 0 to 3 parts by weight of catalyst (3) Isocyanate prepolymer