JP2915360B2 - Method for forming composite coating and composite coating structure - Google Patents

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. And a composite coating structure having the composite coating.

[0002]

2. Description of the Related Art Conventionally, anticorrosion and waterproofness are applied to the surface of concrete, cement mortar, polymer cement, or other cement products constituting the floor, walls, ceiling, etc. of a concrete structure, or steel, etc. of a steel structure. For the purpose, various protective films are formed or various processes are performed. In addition, for the purpose of waterproofing the exterior wall of a building, the exterior wall is formed with mortar after waterproofing with a waterproof sheet or the like.

Various materials have been used to form this protective film. For example, as the anticorrosion material, epoxy resin type, urethane resin type, reactive curable resin such as vinyl ester resin type is frequently 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, 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 waterproofing material, a method of forming a waterproofing layer by laminating or bonding sheets of polyethylene, soft polyvinyl chloride, ethylene-vinyl acetate copolymer, synthetic rubber, or the like, or by heating and melting asphalt, In addition, it is also used as a structure.

[0004]

However, depending on the conventional waterproofing material, anticorrosive material, or method, there were cases where the performance required for the film could not be sufficiently satisfied. For example, it has been extremely difficult to form a coating on the surface of a concrete structure, a steel structure, or the like, and then integrate concrete or asphalt on the coating. Further, 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 satisfy the requirements. In addition, a coating made of an epoxy resin-based material can be integrated with concrete or asphalt. However, with this epoxy resin-based coating alone, the material has insufficient elongation properties against cracks generated in a structure. There is a possibility that cracks may occur and the waterproof and anticorrosion functions may not be sufficiently exhibited. Therefore, it is conceivable to use an epoxy resin-based or urethane resin-based material in which elongation characteristics are given to the material, but a coating made of such a material generally has a problem of low mechanical strength. Furthermore, asphalt-based materials and sheet waterproof materials have a problem in that adhesion to concrete, asphalt or metal is extremely low. Further, the sheet waterproofing material has a problem that defects are easily generated in a joint portion of the sheet and the waterproof function is impaired.

Accordingly, a first object of the present invention is to provide 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 excellent in acid resistance, alkali resistance and mechanical strength.

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

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

[0008]

According to a first aspect of the present invention, a coating (A) made of a polyurea resin is formed by a spraying method, and the coating (A) is formed on the coating (A). To form a film (B) by applying a primer made of a urethane resin to form a film (C) by applying an epoxy resin on the film (B). At least one selected from cement mortar, cement concrete and asphalt for paving
It is an object of the present invention to provide a method for forming a composite coating, comprising a step of casting a seed to form a layer (D).

In a second aspect of the present invention, a coating (A) made of a polyurea resin is formed on the surface of the structure (E) by a spray method, and a urethane resin is formed on the coating (A). After forming a coating (B) by applying a primer comprising, a coating (C) is formed by applying an epoxy resin on the coating (B), and a cement mortar is further formed on the coating (C). And at least one selected from cement concrete and asphalt for paving, and forming a layer (D)
And a method for forming a composite coating film.

[0010] Further, a third aspect of the present invention is a method for forming a film (F) by applying at least one kind of primer selected from an epoxy resin and a urethane resin to the surface of a structure (E). Coating made of urea resin (A)
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 an epoxy resin is applied on the coating (B) to form a coating ( Forming a layer (D) by forming at least one selected from cement mortar, cement concrete and asphalt for paving on the film (C). The present invention provides a forming method.

Further, 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 a urethane resin and a vinyl resin is formed on the coating (A). A method for forming a composite film, comprising: forming a film (G) by applying one kind of primer, and then forming a film (A) made of a polyurea resin on the film (G) by a spray method. To provide.

The present invention provides, as a structure including the composite coating of the first aspect, a coating (A) made of a polyurea resin on the surface and a coating made of a urethane resin formed on the coating (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:

Further, the present invention provides, as a structure including the coating of the second aspect, a coating (A) made of a polyurea resin on the surface and a urethane resin formed on the coating (A). A coating (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) The present invention provides a composite coated structure having a seed layer (D).

Further, the present invention provides, as a structure including the coating according to the third aspect, a coating (F) made of at least one selected from an epoxy resin and a urethane resin on the surface; (A) formed of a polyurea resin, a film (B) formed of a urethane resin formed on the film (A), and a film formed of an epoxy resin formed on the film (B) An object of the present invention is to provide a composite coating structure having (C) and a layer (D) formed on the coating (C) and made of at least one selected from cement mortar, cement concrete and asphalt for paving.

Further, the present invention provides, as a structure including the coating of the fourth aspect, a coating (A) made of a polyurea resin on the surface, a urethane resin formed on the coating (A), The present invention provides a composite coating structure having a coating (G) composed of at least one kind of 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 of the present invention (hereinafter referred to as "method of the present invention") and the composite coated structure (hereinafter referred to as "structure of the present invention") will be described in detail below. explain.

The method of the present invention basically includes a step of forming a coating (A) made of a polyurea resin on the surface of a structure, and forming a composite coating containing the coating (A) as an essential element. 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 resistance to shearing force applied to the structure and followability of the structure to cracks. Is 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 film (A) is a structure required to have anticorrosion, waterproof, chemical resistance, etc., as long as the film can be formed. Not done. For example, bridge viaducts, piers, bridge decks,
Underground structures such as buildings and apartments, rooftops and outer walls, bottoms and inner and outer walls of excavated tunnels such as subways and roads, floors of factories and station passages, etc., water reservoirs, drainage ponds, waterways, water and wastewater treatment tanks, seawalls Concrete, cement mortar, polymer cement, and other cement-made or steel-made or plastic-made structures such as walls and piers.

Further, in the present invention, a method for forming a composite coating on the surface of a concrete molded product by a method of the present invention using a form panel for concrete molding or the like is as follows.
Underpasses, bridge piers, bridge decks, underground structures and outer walls of buildings and apartment buildings, inner and outer walls of open tunnels such as subways and roads, drinking water ponds, drainage ponds, waterways, water and sewage treatment tanks, seawalls, It is suitably used for forming structures such as piers. In the case of using this form panel, in the step of forming the coating (A) without bonding, the surface of the form 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 pasting a film having good releasability such as polyethylene or polypropylene.

In the step of forming a coating (A) on the surface of the structure in the method of the present invention, prior to forming the coating (A), a primer comprising at least one resin selected from an epoxy resin and a urethane resin is applied. It is preferable to form the film (F) in advance, since the surface of the structure can be reinforced and the adhesive force between the structure and the film (A) can be increased. 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 primers such as an organic solvent type epoxy resin primer, an organic solvent type urethane resin primer, and an 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 modifying agent added as necessary. And 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 condensation products of epichlorohydrin and addition products of the condensation products with amines having a polyethylene glycol chain and a molecular weight of 700 to 1500.

Examples of the reactive diluent having one or more epoxy groups in one molecule include monoglycidyl ethers such as n-butyl glycidyl ether produced from alcohols having 4 or more carbon atoms; Polyfunctional glycidyl ethers such as -hexanediol diglycidyl ether, phenyl glycidyl ether produced from phenols, and γ-glycidoxypropyltrimethoxysilane, and the like, which reduce viscosity and impart flexibility. It is added as needed for the purpose.

Further, examples of the modifying agent include a material for emulsifying a resin such as chroman, indene and dicyclopentadiene, and a polyoxyalkyleneamine comprising ethylene oxide and propylene oxide.

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

In particular, the resin having two or more epoxy groups in one molecule and the one or more epoxy group in one molecule are excellent in workability in coating operation for forming the film (F). A coating liquid obtained by diluting an epoxy resin composition containing a reactive diluent, a main agent comprising a modifier added as necessary, and a curing agent with a solvent, and an emulsifier in the epoxy resin composition. Or a coating solution in which water is mixed with a polyamine and an epoxy group-containing self-emulsifying resin in which a polyoxyalkyleneamine is added to a condensation product of bisphenols and epichlorohydrin, and water. Is valid. Examples of the epoxy group-containing self-emulsifying resin include polyoxyalkyleneamine having a molecular weight of 900 to 1100 per 100 parts by weight of a condensation product of a bisphenol and epichlorohydrin.
Those to which 0 parts by weight are added are exemplified. As the polyamine, a polyamine having a water concentration of 10 to 80% by weight, preferably 20 to 60% by weight when turbidity occurs in mixing with water is useful.

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

The urethane resin used as a primer for forming the coating (F) is a polyisocyanate and a poly-isocyanate having two or more hydroxyl groups in one molecule.
And reacting them. These are prepolymers which are reactants of polyisocyanate and one or more types of polyols, and are moisture-curable one-part urethane resins containing isocyanate residues, or polyisocyanates and polyols. Used as an organic solvent-type primer composed of a two-component mixed type urethane resin of a prepolymer having at least one isocyanate group in one molecule, which is a reaction product of the above, and a polyol.

Examples of the polyisocyanate include isophorone diisocyanate, 1,6,11-undecane triisocyanate, xylylene diisocyanate, cyclohexane 1,4-diisocyanate and 4.4. '-Dicyclohexylmethane 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. These may be used alone or in combination of two or more.

Examples of the polyol include polyether polyols such as polyethylene ether glycol, polypropylene ether glycol and polytetramethylene ether glycol, and polyethylene adipate glycol.
Polyester polyols such as polyethylene propylene adipate glycol, polybutylene adipate glycol, polyhexamethylene adipate glycol, polycaprolactone glycol, acrylic polyols, and chain extenders. Glycols such as low molecular weight aliphatic, aromatic and heterocyclic groups; triols such as trimethylolpropane; amino alcohols such as ethanolamine;
Other examples include polyols having a high OH value, such as sucrose, and these can be used alone or in combination of two or more.

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

In the present invention, the coating amount of the coating (F) is
50 to 200 g / m2 as a dry film ^TwoAbout and preferred
Or 50-150 g / m^TwoIt is about. Also, coating
(F) shows the case where the base material of the structure is concrete
Divide into two or more times to prevent defects such as holes
It is preferable to form the layers by coating. In addition, epoxy tree
Apply a primer consisting of oil and / or urethane resin.
After the cloth is formed, a coating (A) made of polyurea resin is formed.
The time required for the coating to remain firm between the coating (F) and the coating (A)
It is important to adhere to the coating, and is usually applied to the coating (F).
From the dry-to-touch state defined in JIS K5400
Form a film (B) before the film is dried and cured.
Is preferred. Epoxy resin and / or urethane
After the tin resin has completely cured, the reaction point with polyurea
Can cause problems with integrity (adhesion) due to lack of
Is not preferred.

In the present invention, the coating (F) may include zinc white, ultramarine, carbon black, cadmium red, cobalt green, cobalt violet, cobalt blue, chromium oxide green, titanium oxide, cerulean blue, if necessary. Colored pigments such as titanium yellow, pushan blue, mars violet, bengala, permanent red, hanza 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, and 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 epoxy resins and urethane resins using a brush, a roller brush or the like, or by spraying. The method can be performed by applying to the surface of the structure by a method such as application by painting, and then drying and curing.

The composite coating film (A) formed by the present invention
As a polyurea resin forming the following, a first component composed of the following component (1) and / or component (2) and a catalyst used as required, and a second component composed of component (3) Are mixed and reacted. (1) 100 to 500 parts by weight of an amine-terminated polyether polyamine having an amino group bonded to a secondary carbon atom per 100 parts by weight of an amine-terminated chain extender (2) Primary alcohol and / or secondary alcohol-terminated polyether 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,
N, N'-bis (t-butyl) ethylenediamine, di (methylthio) toluenediamine and the like can be mentioned. 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 or butylene oxide or a mixture thereof with an appropriate polymerization initiator. Is obtained by reacting a hydroxyl group present at the terminal of the compound with ammonia to substitute an amino group. 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 core. Specific examples of the amine-terminated polyether polyamine include a diamine having an average molecular weight of 200 to 4100, 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 nucleus of trimethylolpropane or glycerin.
And 500 of these triamines. 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, and polypropylene ether glycol. , Polyether polyols such as polytetramethylene ether glycol, polyethylene adipate glycol, polyethylene propylene adipate glycol, polybutylene adipate glycol, polyhexamethylene adipate glycol, polyester polyols such as polycaprolactone glycol, acrylic polyol, phenolic resin polyol, epoxy polyol, Butadiene polyol, polyester-polyate Polyols, polycarbonate polyols, include vegetable oils, which are also used in combination of two or more species.

The (3) isocyanate prepolymer is a prepolymer having at least one isocyanate group 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 a component of the coating (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 carbodiimide modified products thereof, 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. In the first component, (2) a primary alcohol and / or
Alternatively, when the secondary alcohol-terminated polyether polyol is contained, the content thereof is 0 to 500 parts by weight, preferably 1 to 100 parts by weight of the amine-terminal chain extender.
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. Examples of the catalyst that is used as needed and accelerates the curing reaction of the polyurea elastomer include, for example, known triethylenediamine, N, N, N ′, and 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 film (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 extender, a quasi-prepolymer in which part of the isocyanate groups produced from polyisocyanate and polyol may remain unreacted, using a polyurea elastomer produced using aromatic polyisocyanate You may.

In the present invention, the film (A) may contain, if necessary, a conventionally known ultraviolet absorber, radical scavenger, coloring agent, extender, plasticizer, flame retardant, additive and the like. Can be blended.

As the UV 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).

As the radical scavenger, for example, Shimasolve 622, Shimasolve 944, Irganox 101
0, Irganox 245 (manufactured by Ciba Geigy).

Examples of the coloring agent include zinc white, ultramarine, carbon black, cadmium red, cobalt green, cobalt violet, cobalt blue, chromium oxide green, titanium oxide, cerulean blue, titanium yellow, plush blue, and mars violet. , Bengala, permanent red, Hansa Yellow, phthalocyanine green, phthalocyanine blue, benzidine yellow, and lake red.

Examples of the extender include alumina, kaolin, activated carbon, activated clay, glass balloon, glass beads, glass flake, glass powder, graphite, diatomaceous earth, acid clay, silica, zirconia, aluminum hydroxide, slag, zeolite, and the like. 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 added as required, are used in the first or second component for forming the polyurea resin.

In the method of the present invention, the step of forming the coating (A) by the spray method is not particularly limited as long as the method can spray-coat the polyurea resin material. For example, when forming a coating made of a polyurea elastomer composed of the first component and the second component, the first component and the second component are measured and measured by a proportioner.
It is formed by controlling the pressure, heating, supplying the spray gun inside the spray gun, directly colliding inside the spray gun, and spraying the surface of the structure or the like while reacting. When the first component contains the component (2) and the reaction speed is relatively slow, it is possible to perform mixing by a stirring mixer or a static mixer before supplying the mixture to the spray gun.

In the method of the present invention, when a layer (D) composed of at least one selected from cement mortar, cement concrete and asphalt for paving is formed on the film (A), An organic solvent type primer comprising at least one resin selected from a urethane resin and a vinyl resin to form a coating (B), and further applying a primer comprising an epoxy resin on the coating (B). After the coating (C) is formed by coating, the layer (D) is formed. The cured coating (A) and the coating (B), the coating (B) and the coating (C), and the coating (C) and the coating (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, the coating (B) formed by applying a primer made of a urethane resin is preferable in that the adhesion to the polyurea resin is particularly good.

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

Examples of the urethane resin used for forming the film (B) include, for example, (a) a reaction between a primary alcohol and / or a secondary alcohol-terminated polyol and a polyisocyanate, and a molecular terminal. One-component organic solvent type urethane resin composition curable by moisture containing 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 comprising a polyisocyanate and an organic solvent at a predetermined ratio before use.

The one-part 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, which has an isocyanate residue. A composition in which a polyurethane prepolymer is dissolved in an organic solvent may be used.

Examples of the two-pack type urethane resin composition include, as a 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 a 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, hexamethylene-1,6-diisocyanate as a second component liquid , Burette, or a solution of isocyanurate.

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

In the present invention, these primers composed of a urethane resin may be used alone or in combination of two or more.

In the present invention, when producing a structure having a layer (D) selected from cement mortar, concrete or asphalt for paving on a coating (A) comprising a polyurea elastomer, A primer comprising at least one selected from a urethane resin and a vinyl resin is applied to form a film (B), and a primer composed of an epoxy resin is further applied thereon to form a film (C). It is particularly preferable to form a layer (D) made of cement mortar, concrete or asphalt for paving, since 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: the same applies hereinafter) of 165 to 5
Bisphenol A type epoxy resin, bisphenol AD type epoxy resin, bisphenol F type epoxy resin, novolak type epoxy resin having an epoxy equivalent of 170 to 250, diglycidyl phthalate having an epoxy equivalent of 160 to 350, epoxy equivalent having a range of 50 Is 100
At least one selected from glycidylamines of 250 may be used. Among these, bisphenol A type epoxy resin which is liquid at 25 ° C., bisphenol A
D-type epoxy resins and bisphenol F-type epoxy resins are preferred.

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

Examples of the epoxy resin curing agent include linear aliphatic polyamines such as polyethylene polyamine, polyalkylene ether polyamine and polymethylene polyamine, cyclic aliphatic polyamines such as N-aminoethylpiperazine and isophorone diamine, and xylylenediamine. Polyamines composed of at least one of aliphatic aromatic amines, amidoamines composed of the polyamines and fatty acids, polyamideamines composed of the polyamines and dimer acid, and other modified polyamines derived from the polyamines, 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 a polyethylene polyamine and a dimer acid is preferable because of excellent adhesion between the film (B) and the layer (D). is there.

In the present invention, conventionally known coloring agents, extenders, additives and the like can be added to the film (C), if necessary.

Examples of the coloring agent include zinc white, ultramarine, carbon black, cadmium red, cobalt green, cobalt violet, cobalt blue, chromium oxide green, titanium oxide, cerulean blue, titanium yellow, pushhan blue, and mars violet. , Bengala, permanent red, Hansa Yellow, phthalocyanine green, phthalocyanine blue, benzidine yellow, and lake red.

Examples of the extender include alumina, kaolin, activated carbon, activated clay, glass balloon, glass beads, glass flake, glass powder, graphite, diatomaceous earth, acid clay, silica, zirconia, aluminum hydroxide, slag, zeolite, and the like. 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.

In forming the coating (C), a method of mixing and applying an aggregate such as sand or silica sand to a primer made of an epoxy resin, or dispersing these aggregates at the time of applying an epoxy resin primer. By forming irregularities on the surface of the film (C) by such a method as described above, it is possible to increase the bonding area with cement mortar, cement concrete, asphalt for paving, and the like, and at the same time, to improve the bonding force by the anchoring effect.

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

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

In the present invention, when a coating (A) made of a polyurea resin or a coating made of a polyurethane resin or the like is further formed on the coating (A), the polyurea resin or the polyurethane resin is simply laminated. When applied, at room temperature, if the time in between is less than 3 hours, sufficient integrity can be developed between the two films. Coating with a urea resin may cause insufficient integration and delamination. Then, in order to sufficiently bond the films (A) made of polyurea resin together to make them integral, the lower film (A) is made of at least one resin selected from urethane resin and vinyl resin on the lower film (A). It is preferable to form a coating (A) made of a polyurea resin after forming a coating (G) by applying a primer.

Examples of the urethane resin or vinyl resin used as a primer for forming the coating (G) include the same resins as those used for forming the coating (B). In particular, as the vinyl resin, polyvinyl chloride resin 1
A resin obtained by dissolving a resin in which 5 to 30 parts by weight of phthalic acid ester is added to 00 parts by weight in a mixed solvent consisting of methyl isobutyl ketone, xylene and butyl acetate is coated (A).
This is preferable because they can be firmly bonded to each other.

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

Further, in the present invention, a film made of a polyurea resin or polyurethane is provided on an upper layer such as a film (A) made of a polyurea resin or a film made of a polyurethane resin to protect the film from sunlight and improve weather resistance. It is preferable that a light-shielding paint is applied to form a film. Examples of the light-shielding paint used include oil-based paints, alkyd resin paints, unsaturated polyester resin paints, urethane resin paints, acrylic resin paints, vinyl resin paints, and among others, appearance stability, adhesion to polyurethane resin From the viewpoint of properties, a vinyl resin paint and a non-yellowing urethane resin paint are preferred.

As a light-shielding paint, 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. And a paint containing an ultraviolet absorber and the like are particularly preferred.

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

[0075]

According to the present invention, a specific organic solvent type primer is applied to the coating (A) formed of a polyurea elastomer with or without bonding to a structure or the like to form a coating (B) or a coating. (G), an epoxy resin-based primer is applied on this coating (B) to form a coating (C), which is waterproof and corrosion-proof with the concrete or asphalt layer (D) to be cast later. Coated film (A)
By firmly adhering and integrating, a structure having excellent durability can be obtained. In addition, when the coating (A) is spliced, repaired, or overcoated to increase the thickness of the coating (A), the coating (A) is coated with the coating (G) to form a coating (G). Alternatively, it is possible to obtain a waterproof and anticorrosive coating which is firmly bonded to the overcoated coating (A) and integrated.

Further, in a structure used in an environment where a film made of a polyurea resin or a polyurethane resin is exposed to sunlight, a film is formed by applying a film-forming resin paint containing a light-shielding material. This makes it possible to maintain the durability of the coating made of polyurea resin or polyurethane resin for a long period of time.

[0077]

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

Example 1 The upper surface of a test concrete plate (100 × 100 × 60 mm) obtained by cutting a 300 × 300 × 60 mm concrete plate with a diamond cutter 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 the test concrete plate and methoxypoly (oxyethylene / oxypropylene) -2-propylamine (average molecular weight: 1000) 1 was added.
Resin with 0 parts by weight (epoxy equivalent: 216) 10
0 parts by weight and epoxy-modified m-XDA (active hydrogen equivalent:
95 g / eq, solubility in water: 32 g / 100 g)
43 parts by weight and 143 parts by weight of ion-exchanged water were further mixed, and a two-part mixed type emulsion primer was applied twice with a brush to form a film (F).

Thereafter, 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, 64.6 parts by weight of diethyltoluenediamine, and 27.1 parts by weight of N, N'-diethylaminodiphenylmethane were added and mixed by stirring, and 5 parts by weight of rutile-type titanium oxide was kneaded and mixed with white. A first component liquid was prepared. Also, 100 parts by weight of carbodiimide-modified methylene diphenyl diisocyanate was added to polypropylene glycol (average molecular weight: 200
0) 66.7 parts by weight were reacted, and 0.1 part by weight of phthalocyanine blue was kneaded to prepare a second component liquid colored blue.

Each of the stock solutions of the polyurea elastomer composed of the first component solution and the second component solution was supplied to a spray gun connected to a high-pressure supply device (H-2000; manufactured by GUSMER), and the test concrete plate was supplied. Was spray-coated to form a coating (A) having a thickness of 1 mm.

Next, a urethane prepolymer obtained by reacting TDI with polypropylene glycol (average molecular weight: 2,000) on the surface of the coating (A) in the presence of dibutyltin dilaurate, toluene, methyl ethyl ketone and ethyl acetate. A film (B) was formed by applying 200 g / m ^{2 of a} moisture-curable urethane primer (non-volatile content: 35%, NCO content: 3.5%). After drying, an epoxy resin comprising a bisphenol A type epoxy resin and 1,6-hexanediol diglycidyl ether (epoxy equivalent: 180, viscosity 950 mPa · s / 2)
5 ° C.) 100 parts by weight of a two-part 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 polyamidoamine (trade name: Versamide 140) are mixed by a predetermined method. Then, 200 g / m ^{2 was} applied on the film (B) to form a film (C).

Next, a part of the coating (C) was 70 m long.
A mortar (portland cement: Toyoura sand: water = 20 parts by weight: 4 parts by weight) is placed in a mold with a mold having a size of mx 70 mm wide x 60 mm high placed in a state where the contact portion with the coating film is sealed.
(0 parts by weight: 13 parts by weight) and cured for 7 days. After curing, the mold was removed to obtain a specimen of a composite coated structure in which a cement mortar layer (D) was formed on the coatings (A), (B) and (C).

The adhesive strength between the coating (A) and the layer (D) was measured by a compression shear adhesion test. In the test, a test specimen was set up and the concrete plate containing the coating (A) was fixed to a jig,
Block (wood: 50 mm x 60 mm) on the upper surface of layer (D)
× 70 mm), and the measurement was performed in accordance with the method of JIS K 6852.

Separately, a stainless steel plate (500 mm × 500 mm) whose surface has been release-treated with a fluorine compound
× 4 mm), and a film (A) having a thickness of 1 mm was formed on the surface by the above-described method. This coating was removed from the stainless steel plate to obtain a released coating (A).
The tensile strength of the coating (A) was measured according to the above. Table 1 shows the results. The properties of this coating (A) alone were determined by JI
Tested according to SA6021 (coating waterproofing material for roof).
Table 2 shows the results.

(Example 2) The polyurea elastomer of Example 1 was replaced with an alcohol-terminated polyether triol and an alcohol-terminated polyether diol, respectively, in which the amine-terminated polyether in the first component was replaced by dibutyltin. A test specimen of a composite coated structure was obtained in the same manner as in Example 1 except that the polyurea elastomer was added, and a compression shear adhesion test was performed.
The bond strength between the coating (A) and the layer (D) was measured. Further, in the same manner as in Example 1, a single film (A) was formed, and its tensile strength was measured. Table 1 shows the results.

Example 3 A composite coated 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 bond strength between was measured. Table 1 shows the results.

Comparative Example 1 As in Example 1, a coating (A) was formed on the surface of a test concrete plate. Then
In the same manner as in Example 1, a mold was placed on a part of the coating (A), and 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). Table 1 shows the results.

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. Next, in the same manner as in Example 1, a mold was placed on a part of the coating (A), and 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). Table 1 shows the results.

Comparative Example 3 An asphalt roofing sheet (tensile strength: 2.9 MPa, JISA6013; commercial product) was fused to a test concrete plate treated in the same manner as in Example 1 to form a coating. Then, Example 1
In the same manner as in Example 1, a mold was placed on a part of this coating, and a cement mortar was directly poured and cured to obtain a test piece in which a layer (D) was formed. The adhesive strength between the coating (A) and the layer (D) was measured. Table 1 shows the results.

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

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

Comparative Example 4 In the same manner as in Example 4, a 1 mm thick coating (A) made of a polyurea elastomer was formed inside a wooden frame. Next, asphalt for surface pavement having a thickness of about 70 mm is directly laid on the surface of the coating (A) and pressed with a loader to produce a composite coating structure having an asphalt layer (D) having a thickness of about 50 mm. did.
The obtained composite coated structure was subjected to a compression shear adhesion test in the same manner as in Example 4 to measure the adhesion strength between the coating (A) and the layer (D). Table 3 shows the results.

(Example 5) A cement mortar plate (70 × 70 ×
A film (F) and a film (A) were formed on one surface of a 20 mm (manufactured by Japan Test Panel) in the same manner as in Example 1. The adhesion of the obtained coating (A) was examined by preparing the following test pieces 1 to 5. (Test piece 1) Two hours after the production of the coating (A), a portion of 40 mm on one side of the coating (A) was covered with a 50 μm-thick polyester film (Lumirror, manufactured by Toray Industries, Inc.), and the coating (A) was formed again. The entire surface was formed with a thickness of 1 mm. (Specimen 2) With respect to one of the other specimens, three days after the preparation of the coating (A), a portion of 40 mm on one side was covered with a polyester film in the same manner as the specimen 1, and the coating (A) was again applied to the entire surface. It was formed with a thickness of 1 mm. (Test piece 3) For one of the other test pieces, three days after the preparation of the coating (A), a portion of one side of the coating (A) of 40 mm was covered with a polyester film, and the remaining portion of the coating (A) was 200 g / m ^{2 of} a moisture-curable urethane primer was applied to the surface in the same manner as in Example 1, and the film was dried by touch to form a film (B). Then, the film (A) was formed again to a thickness of 1 mm on the entire surface. . (Test piece 4) Three days after the preparation of the coating (A), another test piece was covered with a polyester film in the same manner as the test piece 1, and the surface of the remaining coating (A) was covered with polycaprolactone. A polyester polyol in which a polyol is dissolved in a mixed solvent of toluene, ethyl acetate, butyl acetate, and xylene, and a toluene diisocyanate reacted with trimethylolpropane to form a trinuclear product having a terminal isocyanate residue in an ethyl acetate solution (non-volatile Min: 75%), and dried by touching to form a film (B). Then, the film (A) was formed again with a thickness of 1 mm on the entire surface. (Test piece 5)
Three days after the preparation of the coating (A), one of the other test pieces was covered with a polyester film in the same manner as in Test Piece 1,
A vinyl resin solution obtained by plasticizing 100 parts by weight of 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 the formation of the coating (B), the coating (A) was formed again to a thickness of 1 mm on the entire surface.

Next, after the test pieces 1 to 5 were left to cure for 3 days, the polyester film was removed from the film formed on the upper layer, and a free film (A) was provided at a portion of 40 mm on one side, and Five types of test pieces were obtained, each including a coating in which the upper and lower coatings (A) were adhered to each other at a portion of 30 mm.
For each of the test pieces 1 to 5, the released coating (A) was bent at 180 degrees, fixed to a jig, and tightened.
The first coat (A) and the cement mortar are fixed to the other jig and tightened, and the upper and lower coats (A) are separated from each other using a testing machine (Tensilon; manufactured by Toyo Baldwin) by 180.
It was subjected to a peel test 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 ×
20 mm; manufactured by Nippon Test Panel Co., Ltd.), except that a polyurea elastomer material was used 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 between the upper and lower coatings (A) was evaluated. Table 4 shows the results.

Example 7 A cement mortar plate (150 × 70) in which the latence on the surface was polished and removed with a wire brush was used.
× 20 mm: 100 parts by weight of an epoxy resin (epoxy equivalent: 180, viscosity: 950 mPa · s / 25 ° C.) composed of bisphenol A type epoxy and 1,6-hexanediol diglycidyl ether on the entire surface of a test panel manufactured by Japan Test Panel; A primer obtained by mixing 130 parts by weight of a 50% aqueous solution of a modified polyamidoamine (trade name: Ankamide 360), 90 parts by weight of isopropyl alcohol, and 30 parts by weight of ion-exchanged water was applied to form a coating (F). Thereafter, a coating (A) having a thickness of 2 mm was formed on the coating (F) in the same manner as in Example 1 to cover the concrete plate, and a test specimen for an alkali resistance test and an acid resistance test was prepared. Obtained.

The test specimens were cured for 3 days, immersed in a 10% aqueous sulfuric acid solution and a saturated aqueous calcium hydroxide solution for 3 days each, and the adhesive strength was measured. Adhesion strength is measured using a Kenken-type adhesion tester after bonding 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.

Example 8 A stainless steel plate (500 mm × 500 mm × 4 m
A film (A) having a thickness of 2 mm was formed on the surface of m) in the same manner as in Example 1. The coating (A) was detached from the stainless steel plate to obtain a released coating (A), which was 150 mm × 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-part mixed epoxy was applied at 200 g / m ² to form a coating (C). After that, the coating (A) is molded (with an inner dimension of 150 mm).
mm × 70 mm × 25 mm in height), the coating (A) is fitted into the mold with the primer-treated side up, and a cement mortar is poured over the coating (A) to form a coating 2.
After curing and demolding for one day, a composite coated structure was obtained.

The obtained composite coated structure 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 Guidelines (draft) (June 1993, edited by Japan Sewerage Corporation). went. Table 6 shows the results. In addition, the adhesion test and the alkali resistance test were performed using the composite coated structure itself as a test body. In the acid resistance test, the side surface of the composite coated structure and the cement mortar surface were polished to adjust the base material, and 200 g of the moisture-curable urethane primer was applied to these surfaces and the end of the coating (A) at 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. Further, as a reference, a test body 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 was prepared, and a water permeability test was performed. Table 6 shows the results.

[0100]

[0101]

[Table 1]

[0102]

[0103] Note Explanation of symbols ◎ ・ ・ ・ ・ ・ ・ Cohesive failure of film (A) and / or film (B) × ・ ・ ・ ・ Interfacial peeling of film (A) and film (B) ○ ・ ・ ・ ・ ・ ・ ◎ and × mixed

[0104]

[0105]

[0106]

According to the method for forming a coating of the present invention, a composite coating having excellent adhesiveness, acid resistance, alkali resistance, water permeability and the like can be obtained. In particular, since a coating made of a tough polyurea resin having anticorrosion properties and waterproofness, and a concrete to be cast thereon, asphalt for pavement, etc., can be provided as an anticorrosion waterproofing film-coated structure, A structure having excellent durability can be obtained.

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

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kakutaro Kauchi 4-5-14 Nihonbashi Honcho, Chuo-ku, Tokyo Inside San Techno Chemical Co., Ltd. (56) References JP-A-4-202073 (JP, A) JP-A-56-91079 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B32B 1/00-35/00

Claims (10)

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