JPH09295880A - Composition for impregnation and primer composition for resin concrete, its coating method and composite body using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water and/or carbon dioxide from penetrating into a concrete body due to its solidified surface and to improve the adhesive strength between a cement concrete surface and a resin concrete in coating the resin concrete on the cement concrete surface by coating the cement concrete surface. SOLUTION: These composition for impregnation and primer composition for resin concrete contain (a) a polyfunctional (meth)acrylate in which two or more ethylenic unsaturated double bonds are contained in one molecule, (b) mono- and/or poly-functional (meth)acrylate in which two or more ethylenic unsaturated double bonds are not contained in one molecule, (c) a polymerization imitate and (d) a decomposition promoter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impregnating composition which, when applied to the surface of cement concrete, densifies the surface of the concrete skeleton and prevents water and carbon dioxide from penetrating into the interior. The present invention also relates to a primer composition for resin concrete, which improves the adhesive strength between the cement concrete ground surface and the resin concrete when the resin concrete is applied to the cement concrete ground surface. In particular, it relates to a primer composition for resin concrete which improves the adhesive strength with a cement concrete substrate in a wet state. The cement concrete referred to in the present invention means an inorganic concrete or mortar.

[0002]

Cement concrete is widely used in the field of civil engineering and construction such as floors of buildings and pavement of roads because of its excellent durability. However, since cement concrete is easily corroded by rain wind, sewage, carbon dioxide, chemicals, etc., it is desirable to protect the cement concrete by impregnating or covering the cement concrete base surface with a resin composition. Examples of methods for protecting cement concrete include a method using an impregnating composition and a method using resin concrete.

The method of using the impregnating composition is a method of impregnating voids in cement concrete with the impregnating composition so as to have corrosion resistance against water and carbon dioxide. Examples of the impregnating composition include epoxy resin type and acrylic resin type.

Examples of the method of using resin concrete include a method of coating or applying the cement concrete base surface with resin concrete so as to have corrosion resistance and abrasion resistance to chemicals. In particular, resin concrete is rapidly becoming popular in recent years by taking advantage of its excellent chemical resistance and high strength. Of these, epoxy resin-based, urethane resin-based, unsaturated polyester resin-based, and acrylic resin-based resin concrete are often used. These various resin concretes have various characteristics depending on the properties of the resin as the main component. have. Among these resin concretes, radically polymerizable resin concretes such as unsaturated polyester resin-based and acrylic resin-based resin concretes are attracting attention because of their good low-temperature workability.

[0005]

However, these impregnating compositions have a problem that they do not react at room temperature or have a high viscosity and must be polymerized by heating, resulting in complicated work. there were. Further, as an impregnating composition to be impregnated at room temperature, an impregnating composition containing a monofunctional (meth) acrylate having a dicyclopentadiene structure in one molecule has been proposed (see JP-A-5-254960). However, this impregnating composition must be impregnated under pressure, which causes a problem that the work becomes complicated.

[0006] On the other hand, these resin concretes also have the drawback that the adhesive strength is insufficient for a wet surface substrate such as cement concrete wet with water. There is a problem that the work becomes complicated if it is dried sufficiently. Further, a primer containing a monofunctional (meth) acrylate having a dicyclopentadiene structure in one molecule is proposed as a primer which is applied to a cement concrete base surface to improve the adhesive strength between the base surface and resin concrete. (Japanese Patent Laid-Open No. 4-224
184). However, this primer also has a problem that the adhesive strength between the wet base surface and the resin concrete is still insufficient, and the cured product of the primer is brittle and poor in durability.

The inventor of the present invention aims to improve these problems.
As a result of diligent examination of a composition for impregnation that can be impregnated at normal pressure and a primer composition for resin concrete showing sufficient adhesiveness even to a wet surface of cement concrete, impregnation with a polymerizable compound having a specific structure added It has been found that the composition for use is applied to the surface of the substrate to show sufficient impregnating property and adhesiveness to the surface of the substrate which is wet.

[0008]

Means for Solving the Problems That is, the present invention provides (a) 1
Containing a polyfunctional (meth) acrylate having two or more ethylenically unsaturated double bonds in the molecule, (b) monofunctional (meth) acrylate, (c) polymerization initiator and (d) decomposition accelerator The composition for impregnation comprises:
Further, (a) a polyfunctional (meth) acrylate having two or more ethylenically unsaturated double bonds in one molecule, (b) a monofunctional (meth) acrylate, (c) a polymerization initiator and (d).
A primer composition for resin concrete, comprising a decomposition accelerator, (a) a polyfunctional (meth) acrylate having two or more ethylenically unsaturated double bonds in one molecule, (b) Monofunctional (meth) acrylate, (c) polymerization initiator, (d) decomposition accelerator and (e) 1
A primer composition for resin concrete, comprising a polyfunctional (meth) acrylate having no two or more ethylenically unsaturated double bonds in the molecule, wherein the decomposition accelerator is a metal salt of an organic acid. And / or an organometallic chelate compound, which is a primer composition for resin concrete. A method for applying the primer composition for resin concrete, which is a cured product of the primer composition for resin concrete, and is obtained by applying the primer composition for resin concrete to cement concrete. Further, a composite body of cement concrete and resin concrete, characterized in that the resin concrete primer composition is applied to the surface of the cement concrete, and the resin concrete is applied to the surface. The resin concrete is radical-polymerized. Is a composite body of cement concrete and resin concrete, which is a resin resin concrete, the surface of the resin concrete primer composition is applied to the cement concrete,
A method for producing a composite skeleton of cement concrete and resin concrete, which is characterized in that resin concrete is applied, wherein the cement concrete and the resin concrete are characterized in that the resin concrete is a radical-polymerizable resin concrete. It is a manufacturing method of a composite skeleton.

[0009]

The present invention will be described in more detail below. In the present invention, (a) a polyfunctional (meth) acrylate having two or more ethylenically unsaturated double bonds in one molecule means two or more ethylenically unsaturated double bonds in one molecule. And having two or more methacryloyl groups or acryloyl groups in one molecule. The term “ethylenically unsaturated double bond” as used herein means one having an ethylenically unsaturated double bond that is not adjacent (conjugated) to a carbonyl group, and does not mean a so-called α, β-unsaturated carbonyl group.
The component (a) has the effect of obtaining strong adhesive strength when applied to wet cement concrete.

For example, as (a) a polyfunctional (meth) acrylate having two or more ethylenically unsaturated double bonds in one molecule, methacryl-modified liquid polybutadiene having both terminals "TE-2000" (manufactured by Nippon Soda Co., Ltd.) , Both ends acrylic modified liquid polyacrylonitrile butadiene "Hycar
"VTBNX" (manufactured by Ube Industries, Ltd.), methacryl-modified liquid partially hydrogenated polybutadiene at both ends "TEAI-100"
0 "(manufactured by Nippon Soda Co., Ltd.) and liquid polybutadiene having both ends modified with acrylic resin" BAC-45 "(manufactured by Osaka Organic Co., Ltd.).

The amount of the component (a) used is preferably 1 to 90 parts by weight in a total of 100 parts by weight of the components (a) and (b) in consideration of adhesiveness and curability.
~ 80 parts by weight is more preferred. If it is less than 1 part by weight, the impregnating property and the adhesive property may deteriorate. If it exceeds 90% by weight, the impregnating property into cement concrete and the adhesive property may deteriorate.

The (b) monofunctional (meth) acrylate in the present invention has one methacryloyl group or acryloyl group in one molecule. The component (b) can be well impregnated and adhered to cement concrete, and has an effect of improving impregnability and adhesiveness.

For example, monofunctional (meth) acrylates include (meth) acrylic acid and methyl (meth) acrylate.
, Ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth)
Acrylate, isodecyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, phenyl (meth) acrylate, cyclohexyl (meth) acrylate, dicyclopentanyl (meth )
Acrylate, isobornyl (meth) acrylate, methoxylated cyclodecatriene (meth) acrylate, 2
-Hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, polyethylene glycol mono (meth) Acrylate, polypropylene glycol mono (meth) acrylate, alkyloxypolyethylene glycol mono (meth) acrylate, alkyloxy polypropylene glycol mono (meth) acrylate, phenoxypolyethylene glycol mono (meth) acrylate -, Phenoxy polypropylene glycol mono (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, glycidyl (meth) acrylate
, Caprolactone-modified tetrahydrofurfuryl (meth) acrylate, 3-chloro-2-hydroxypropyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate, N, N-diethylaminoethyl ( (Meth) acrylate, t-butylaminoethyl (meth) acrylate, morpholine (meth) acrylate,
Ethoxycarbonylmethyl (meth) acrylate, ethylene oxide-modified phthalic acid (meth) acrylate, ethylene oxide-modified succinic acid (meth) acrylate, trifluoroethyl (meth) acrylate, tetrafluoropropyl (meth) acrylate And 2-hydroxy-3-
A monofunctional (meth) acrylate having no ethylenically unsaturated double bond in one molecule such as (meth) acryloyloxypropyltrimethylammonium chloride is preferably used.

Of these, a monofunctional (meth) acrylate ester having no ethylenically unsaturated double bond in one molecule is preferable because it has good compatibility with the component (a), and has 1 to 12 carbon atoms. More preferred are alkyl mono (meth) acrylates and / or hydroxyalkyl mono (meth) acrylates having 1 to 12 carbon atoms.

In addition to the above, dicyclopentenyl acrylate, dicyclopentenyl methacrylate, dicyclopentenyloxyethyl acrylate, dicyclopentenyloxyethyl methacrylate and the like have a single ethylenically unsaturated double bond in one molecule. A functional (meth) acrylate may be used to such an extent that the object of the present invention is not impaired.

The amount of the component (b) used is preferably 10 to 99 parts by weight in the total 100 parts by weight of the components (a) and (b) in consideration of adhesiveness and curability.
20 to 97 parts by weight is more preferable. If the amount is less than 10 parts by weight, the impregnating property and the adhesive property to cement concrete are deteriorated, and 9
If it exceeds 9 parts by weight, the impregnating property and the adhesive property may deteriorate.

The (c) polymerization initiator in the present invention functions as a so-called radical polymerization initiator, and examples thereof include the following organic peroxides.

(1) Ketone peroxides: methyl ethyl ketone peroxide, cyclohexanone peroxide, 3,3,5-trimethylcyclohexanone peroxide, methylcyclohexanone peroxide,
Methyl acetoacetate peroxide, acetylacetone peroxide and the like.

(2) Peroxyketals: 1,1-bis (tert-butylperoxy) -3,3,5-trimethylcyclohexane, 1,1-bis (tert-butylperoxy) cyclohexane, 2,2 -Bis (tert-butylperoxy) octane, normal butyl-4,4-bis (tert-butylperoxy) valerate and 2,2-bis (tert-butylperoxy) butane.

(3) Hydroperoxides: tertiary butyl hydroperoxide, cumene hydroperoxide, diisopropylbenzene hydroperoxide, paramenthane hydroperoxide,
2,5-dimethylhexane-2,5-dihydroperoxide and 1,1,3,3-tetramethylbutyl hydroperoxide.

(4) Dialkyl peroxides: ditertiary butyl peroxide, tertiary butyl cumyl peroxide, dicumyl peroxide, α,
α'-bis (tert-butylperoxy-meta-isopropyl) benzene, 2,5-dimethyl-2,5-di (tert-butylperoxy) hexane and 2,5
-Dimethyl-2,5-di (tert-butylperoxy) hexyne-3 and the like.

(5) Diacyl peroxides: acetyl peroxide, isobutyl peroxide, octanoyl peroxide, decanoyl peroxide, laurinoyl peroxide, 3,3,5-trimethylhexanoyl peroxide, succinic acid peroxide Oxide, benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, meta-toluoyl peroxide and the like.

(6) Peroxydicarbonates: diisopropyl peroxydicarbonate, di-2-ethylhexyl peroxydicarbonate, dinormal propyl peroxydicarbonate, bis (4-tert-butylcyclohexyl) peroxydicarbonate, Di-2-ethoxyethyl peroxydicarbonate, dimethoxyisopropyl peroxydicarbonate, di (3
-Methyl-3-methoxybutyl) peroxydicarbonate and diallylperoxydicarbonate.

(7) Peroxyesters: tert-butyl peroxyacetate, tert-butyl peroxyisobutyrate, tert-butyl peroxypivalate, tert-butyl peroxyneodecanoate, cumylperoxyneo Decanoate, tert-butylperoxy-2-ethylhexanoate, tert-butylperoxy-3,3,5-trimethylhexanoate, tert-butylperoxylaurate, tert-butylperoxybenzoate, diter Shary butyl peroxyisophthalate,
2,5-Dimethyl-2,5-di (benzoylperoxy) hexane, tertiary butyl peroxy maleic acid, tertiary butyl peroxy isopropyl carbonate, cumyl peroxy octoate, tertiary hexyl peroxy neodecanoate , Tertiary hexyl peroxypivalate, tertiary butyl peroxy neohexanoate, tertiary hexyl peroxy neohexanoate, cumylperoxy neohexanoate and the like.

(8) Other organic peroxides: acetylcyclohexyl sulfonyl peroxide, tertiary butyl peroxyallyl carbonate, etc.

Examples of polymerization initiators other than organic peroxides include the following azo compounds.

(9) Azonitrile compounds: azobisisobutyronitrile, 2,2'-azobis (4-methoxy-2,4-dimethylvaleronitrile), 1,1'-azobis (cyclohexane-1-carbo) Nitrile), 1-
[(1-Cyano-1-methylethyl) azo] formamide, 2-phenylazo-4-methoxy-2,4-dimethylvaleronitrile and the like.

(10) Azoamidine compounds: 2,2 '
-Azobis (2-methylpropionamidine) dihydrochloride and the like.

(11) Cyclic azoamidine compounds: 2,2'-azobis [2- (2-imidazoline-2)
-Yl) propane] etc.

(12) Azoamide compounds: 2,2'-azobis {2-methyl-normal- [1,1-bis (hydroxymethyl) -2-hydroxyethyl] propionamide} and 2,2'-azobis {2 -Methyl-normal- [1,1-bis (hydroxymethyl) ethyl] propionamide} and the like.

(13) Alkylazo compounds: 2,2 '
-Azobis (2,4,4-trimethylpentane) and the like. One or more of these can be used. Among the polymerization initiators, organic peroxides are preferred from the viewpoint of curability.

The amount of (c) used is 1 in total of the (a) component, the (b) component, and the (e) component, which will be described later, which is optionally used.
0.2 to 10 parts by weight is preferable with respect to 00 parts by weight.
If it is less than 0.2 parts by weight, the curing will be slow, and if it exceeds 10 parts by weight, the curing rate or the like will not be improved, and the adhesiveness may be deteriorated.

The decomposition promoter (d) in the present invention is a compound that promotes the decomposition of the polymerization initiator, and examples thereof include the following.

(1) Thiourea derivative: diethylthiourea, dibutylthiourea, ethylenethiourea, tetramethylthiourea, mercaptobenzimidazole, benzoylthiourea and the like.

(2) Amines: N, N-diethyl-p-
Toluidine, N, N-dimethyl-p-toluidine, N,
N-diisopropanol-p-toluidine, triethylamine, tripropylamine, ethyldiethanolamine, N, N-dimethylaniline, ethylenediamine, triethanolamine and aldehyde-amine condensation reaction products.

(3) Organic acid metal salts: cobalt naphthenate, copper naphthenate, zinc naphthenate, cobalt octylate, copper octylate, zinc octylate and the like.

(4) Organometallic chelates: copper acetylacetonate, titanium acetylacetonate, manganese acetylacetonate, chromium acetylacetonate, iron acetylacetonate, vanadinyl acetylacetonate, cobalt acetylacetonate and the like. One or more of these can be used.

Of these, thiourea derivatives, organic acid metal salts and organic metal chelate compounds are preferred from the viewpoints of impregnation, adhesiveness and curability, and in particular, the improvement of adhesiveness on a wet cement concrete substrate surface. More preferred are organic acid metal salts and / or organic metal chelate compounds.

The amount of the component (d) used is as follows:
The amount is preferably 0.1 to 10 parts by weight based on 100 parts by weight of the total of the component (b) and the below-described component (e) which is optionally used. If the amount is less than 0.1 parts by weight, the curing will be slow, and if the amount exceeds 10 parts by weight, the curing rate or the like will not be improved, and rather impregnation property or adhesive property may be deteriorated.

Furthermore, in the present invention, it is preferable to use (e) a polyfunctional (meth) acrylate having no two or more ethylenically unsaturated double bonds in one molecule. (E) 1
By using a polyfunctional (meth) acrylate that does not have two or more ethylenically unsaturated double bonds in the molecule,
It has the effect of facilitating the adjustment of the curing speed and the physical properties of the resin.

For example, a polyfunctional (meth) acrylate not having two or more ethylenically unsaturated double bonds in one molecule is polyethylene glycol di (meth) acrylate.
, Polyglyceryl di (meth) acrylate, polypropylene glycol di (meth) acrylate, polybutylene glycol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1 , 6-hexanediol-di- (meth) acrylate, neopentylglycol-di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythrate Lithol hexa (meth) acrylate, tris (meth) acryloyloxyethyl isocyanurate, 2,2-bis (4-
(Meth) acryloxyphenyl) propane, 2,2-bis (4- (meth) acryloxyethoxyphenyl) propane, 2,2-bis (4- (meth) acryloxydiethoxyphenyl) propane, 2,2- Bis (4- (meta)
Acryloxypropoxyphenyl) propane, 2,2-
Bis (4- (meth) acryloxytetraethoxyphenyl) propane, epoxy acrylate "biscoat # 5
40 "(made by Osaka Organic Chemical Industry Co., Ltd.), epoxy acrylate" epoxy ester 3000M "(made by Kyoeisha Chemical Co., Ltd.)
And urethane acrylate "Aronix M-110
0 "(manufactured by Toagosei Kagaku Co., Ltd.) and the like. These one
Species or two or more can be used.

The amounts of these components (e) used are such that
Taking the adhesiveness and curability into consideration, the component (a),
50 out of 100 parts by weight of the total of the components (b) and (e)
It is preferably not more than 1 part by weight, more preferably not more than 1 to 30 parts by weight. If it exceeds 50 parts by weight, the impregnating property or the adhesive property on the wet base surface may be deteriorated.

Further, in the present invention, it is preferable to use the coupling agent (f). (F) Since the coupling agent reacts with the water contained in the cement concrete ground surface, it has the effect of improving the impregnability and adhesiveness between the cement concrete ground surface and the impregnating composition or resin concrete primer composition. . Examples of the coupling agent include silane coupling agents and titanate coupling agents.

Examples of the silane coupling agent include γ-chloropropyltrimethoxysilane, vinyltrimethoxysilane, vinyltrichlorosilane, vinyltriethoxysilane, vinyl-tris (β-methoxyethoxy) silane, γ-methacryloxypropyltrimethoxy. Silane,
γ-acryloxypropyltrimethoxysilane, β-
(3,4-epoxycyclohexyl) ethyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-
Aminopropyltriethoxysilane, N-β- (aminoethyl) -γ-aminopropyltrimethoxysilane, N
Examples include -β- (aminoethyl) -γ-aminopropylmethyldimethoxysilane and γ-ureidopropyltriethoxysilane.

Examples of titanate coupling agents include isopropyltriisostearoyl titanate, isopropyltridodecylbenzenesulfonyl titanate, isopropyl tris (dioctylvirophosphate) titanate, tetraisopropylbis (dioctylphosphite) titanate, tetraoctylbis (ditridecylphosphite). ) Titanate, tetra (2,2-diallyloxy-1-butyl) bis (ditridecyl phosphite)
Titanate, bis (dioctylbairophosphate) oxyacetate titanate, bis (dioctylbairophosphate) ethylene titanate, isopropyl trioctanoyl titanate, isopropyl dimethacryl isostearoyl titanate, isopropyl isostearoyl diacrylic titanate, isopropyl isotri (dioctyl phosphate) titanate, Examples thereof include isopropyl tricumyl phenyl titanate, isopropyl tri (N-aminoethyl-aminoethyl) titanate, dicumyl phenyloxyacetate titanate and diisostearoyl ethylene titanate.

Among these coupling agents, the silane coupling agent is preferable because of its great effect, and (a)
Γ in that it can be copolymerized with the component, component (b) and component (e)
-Mercaptosilane-based silane coupling such as mercaptopropyltrimethoxysilane, vinylsilane-based such as vinyltriethoxysilane and vinyl-tris (β-methoxyethoxy) silane, and (meth) allylsilane-based silane coupling such as γ-mercaptopropyltrimethoxysilane Agents are more preferred.

The amount of these components (f) used depends on the impregnating property,
Taking the adhesiveness and curability into consideration, the component (a),
0.001 to 5 parts by weight is preferable with respect to 100 parts by weight of the total of the component (b) and the component (e) used as necessary. If it is less than 0.001 part by weight, the effect is not obtained, and if it exceeds 5 parts by weight, the adhesiveness and impregnation property may be deteriorated.

In the present invention, the thixotropy may be adjusted by using an inorganic filler or an organic filler. Examples of the inorganic filler include crystalline silica powder, fused silica powder, silica powder such as spherical silica powder and fumed silica, silica sand, carbon black, forastonite, clay, titanium oxide, magnesium oxide, iron oxide, bentonite. , Mica, lead chromate, nickel slag, aluminum hydroxide, spherical alumina powder, stainless powder, silicon carbide powder, silicon nitride powder, boron nitride powder, talc powder, calcium carbonate powder, glass beads, shirasu balloon , Aluminum powder, and titanium powder. Examples of the organic filler include polyethylene powder, corta, urethane resin powder, (meth) acrylic resin powder, silicone resin powder, fluororesin powder, phenol resin powder, wood powder and recycled rubber powder.

The amount of these inorganic fillers and organic fillers used is, considering the impregnating property, adhesive property and curability,
3 to 150 parts by weight is preferable with respect to 100 parts by weight of the total of the component (a), the component (b), and the component (e) used as necessary. If it is less than 3 parts by weight, no effect is obtained, and if it exceeds 150 parts by weight, impregnation property and adhesiveness may be deteriorated.

A small amount of a polymerization inhibitor may be used in the impregnating composition and the resin concrete primer composition of the present invention in order to improve the storage stability thereof. For example, as a polymerization inhibitor, methyl hydroquinone, hydroquinone, catechol, hydroquinone monomethyl ether,
Monotertiary butyl hydroquinone, 2,5-ditertiary butyl hydroquinone, p-benzoquinone,
2,5-Diphenyl-p-benzoquinone, 2,5-ditertiarybutyl-p-benzoquinone, picric acid, phenothiazine, tertiary butylcatechol, 2-butyl-4-hydroxyanisole and 2,6-ditertiarybutyl-p. -Cresol and the like.

The amount of these polymerization inhibitors to be used is preferably 0.001 to 3 parts by weight per 100 parts by weight of the total of the components (a), (b) and optionally (e). , 0.01 to 2 parts by weight is more preferable. 0.001
If it is less than 1 part by weight, the storage stability will be lowered, and if it exceeds 3 parts by weight, the impregnability and the adhesiveness will tend to be lowered, and the curing time may be prolonged.

In the impregnating composition and the resin primer primer composition of the present invention, various commonly used elastomers, solvents, extenders, reinforcing materials, plasticizers, and extenders are used as long as the object of the present invention is not impaired. Additives such as a sticky agent, a thixotropy-imparting agent, a chelating agent, a dye, a pigment, a flame retardant and a surfactant may be used.

In the present invention, a cement concrete having corrosion resistance can be obtained by impregnating the cement concrete with the impregnating composition. Moreover, after the primer composition for resin concrete is applied to the cement concrete, the resin concrete is further applied to form a composite body of the cement concrete and the resin concrete to protect the surface of the cement concrete. By using the primer for resin concrete, the resin concrete can exhibit sufficient adhesiveness to the wet foundation surface of cement concrete.

Resin concrete is characterized by excellent chemical resistance and high strength, and can be used in resin compositions such as epoxy resins, urethane resins, unsaturated polyester resins and acrylic resins in addition to sand, gravel and the aforementioned inorganic fillers. It is obtained by mixing the aggregate with a concrete mixer or a hand mixer. The mixing ratio of the resin composition and the aggregate is 100 parts by weight of the resin composition and the aggregate, and the resin composition: the aggregate =
5 to 95 parts by weight: 95 to 5 parts by weight is preferable, and resin composition: aggregate = 8 to 30 parts by weight: 92 to 70 parts by weight is more preferable. If the resin composition is less than 5 parts by weight or the aggregate exceeds 95 parts by weight, the adhesive strength may decrease. If the resin composition exceeds 95 parts by weight or the aggregate is less than 5 parts by weight, the viscosity is high. As a result, the workability is deteriorated, and the cost is increased because a large amount of the resin composition is used.

Among these resin concretes, the radical-polymerizable unsaturated polyester resin system and acrylic resin system are preferable because they have good low-temperature workability and have the same radical polymerizability as the primer composition for resin concrete of the present invention. Resin concrete is preferable, and acrylic resin-based resin concrete is more preferable.

The method for impregnating the impregnating composition of the present invention is as follows: (a) component, (b) component, (c) component, (d) component and (e) component and (f) which are optionally used. A method of impregnating the composition for impregnation prepared by mixing the components all at once onto the surface of the cement concrete substrate may be mentioned. The impregnating composition of the present invention can be impregnated at room temperature and atmospheric pressure, and has easy workability. The amount of the impregnating composition used is not particularly limited, but is usually 10 to 30 parts by weight, and preferably 15 to 20 parts by weight, relative to the cement concrete before impregnation.

The method for applying the primer composition for resin concrete of the present invention includes (a) component, (b) component,
A composition for impregnation and a primer composition for resin concrete, which are prepared by mixing the components (c), (d) and (e) and (f), which are added as necessary, together on a cement concrete base surface. A method for producing a composite skeleton of cement concrete and resin concrete by applying it to a thickness of about 0.1 to 0.5 mm and then applying resin concrete on the surface thereof can be mentioned. If possible, it is preferable to apply the resin concrete to the surface of the cured body of the applied primer composition for resin concrete.

The impregnating composition of the present invention, the primer composition for resin concrete, and the resin concrete can be applied by a method of applying an ordinary coating material such as spraying or brushing. In addition, the mixture of the component (a), the component (b), and the components (e) and (f), which is used as necessary, is divided into two liquids, one liquid containing the (c) polymerization initiator and the other liquid. It is also possible to separately add (d) the decomposition accelerator and to mix both solutions on site.

[0059]

EXAMPLES The present invention will be specifically described below with reference to examples. JIS A5 for cement concrete base
The concrete sidewalk board specified in 304 was used.

As the surface of the cement concrete in a dry state, the surface of the concrete sidewalk board was sanded with sandpaper No. AA-80 (manufactured by Bellstar Co.) to obtain 20.
The one left for 1 week in an atmosphere of ° C and relative humidity of 65% was used. As the wet cement-concrete base surface, the surface of the concrete sidewalk board is sanded with sandpaper No. AA-80, and the surface of the concrete sidewalk is kept at 20 ° C in water in a constant temperature bath.
It was immersed for a day, and then part of the water in the constant temperature bath was drained off, and it was used while being exposed to an atmosphere of 20 ° C. and 80% relative humidity up to 5 mm below the surface of the sidewalk board.

The following resin concretes were used. Polymethylmethacrylate resin 30 parts by weight, methylmethacrylate 64.5 parts by weight, trimethylolpropane trimethacrylate 5 parts by weight and N, N-
A resin solution for resin concrete was prepared by adding 1.5 parts by weight of benzoyl peroxide to 100 parts by weight of a uniform mixture of 0.5 parts by weight of dimethyl-p-toluidine. On the other hand, the aggregate used was a mixture of 80 parts by weight of sand and 20 parts by weight of silica fume. 20 parts by weight of the resin solution for resin concrete thus obtained and 80 parts by weight of aggregate were mixed to obtain resin concrete.

(Materials used) Sand: River sand from Oigawa, particle size 5 mm or less Silica fume: Commercially available silica fume, specific surface area 14
m ² / g (Examples and Comparative Examples) Commercially available products were used to prepare primer compositions for resin concrete having the compositions shown in Tables 1 to 6. However, in Comparative Example 3, the primer composition for resin concrete was not used, and in Comparative Example 4, as a primer composition for resin concrete, "Bond E8" manufactured by Konishi Co., Ltd.
10 "(aliphatic epoxy, polyamine curing agent system)
In Comparative Example 5, Tonensha's "FP-NS" (aliphatic epoxy, polyamine curing agent type) was used.

Next, a primer composition for resin concrete mixed with the composition shown in Tables 1 to 6 was applied to the surface of the cement concrete in a dry state by brushing to a thickness of about 0.3 mm and applied at 20 ° C. and 65%. It was left to cure in an atmosphere of relative humidity for 5 hours. After that, a mold having a width of 40 mm × 40 mm and a thickness of 30 mm is arranged on the cured product of the resin composition for primer, and the resin concrete is poured into the mold to apply the composition, and an atmosphere of 20 ° C. and a relative humidity of 65% is provided. Cured under for 3 days.

On the other hand, for a wet cement concrete substrate surface, a primer composition for resin concrete is applied and cured in an atmosphere of 20 ° C. and a relative humidity of 80%,
Then, a test was performed in the same manner as the cement concrete base surface in a dry state except that the acrylic resin-based resin concrete was cured and cured in the same atmosphere.

Then, the width of the resin concrete surface is reduced to 4 mm.
Bond a 0mm x 40mm, 25mm thick steel jig with epoxy resin and pull the steel jig using a Kenken-type adhesion tester to measure the adhesive strength between the cement concrete base surface and resin concrete. Then, the destruction state was observed. The results are shown in Tables 1 to 6.

(Materials used) Bisphenol A diglycidyl ether-dimethacrylate: epoxy ester 3000M (manufactured by Kyoeisha Chemical Co., Ltd.) Liquid polybutadiene modified at both ends with methacryl: TE-20
00 (manufactured by Nippon Soda Co., Ltd.) Both ends acrylic modified liquid polyacrylonitrile butadiene: Hycar VTBNX (manufactured by Ube Industries) Both ends methacryl modified liquid partially hydrogenated polybutadiene: TEAI-1000 (manufactured by Nippon Soda Co.) Both ends acrylic modified polybutadiene: BAC- 45 (Osaka Organic Co., Ltd.)

[0067]

[Table 1]

[0068]

[Table 2]

[0069]

[Table 3]

[0070]

[Table 4]

[0071]

[Table 5]

[0072]

[Table 6]

Example 22 The same procedure as in Example 8 was carried out except that a commercially available unsaturated polyester resin was used as the resin solution for resin concrete. The results are shown in Table 7.

Comparative Example 6 Comparative Example 4 was repeated except that a commercially available unsaturated polyester resin was used as the resin solution for resin concrete. The results are shown in Table 7.

[0075]

[Table 7]

(Example 23) The primer composition for resin concrete having the composition of Example 8 was used as an impregnating composition. JIS R 5201 10.4 (1992)
The surface of the dried mortar sample prepared in step 1 above was impregnated with the impregnating composition by brushing at 300 g per 1 m ² ,
Cured. Then, the mortar specimen coated with the impregnating composition was immersed in water at 20 ° C. for a predetermined period, and the weight difference between before and after immersion was taken as the water absorption amount. The results are shown in Table 8.

[0077]

[Table 8]

Comparative Example 7 The procedure of Example 23 was repeated except that the impregnating composition was not used. The results are shown in Table 8.

[0079]

As described above, by using the impregnating composition of the present invention, the cement is excellent in workability because it can be applied at room temperature and normal pressure, and has excellent durability against water and carbon dioxide. Concrete is obtained. Further, by using a resin composition for resin concrete,
It is possible to obtain excellent adhesion between the resin concrete and the lower surface of the cement concrete under the wet condition as well as under the dry condition. In particular, when reinforcing or repairing a civil engineering structure with resin concrete, or when manufacturing a composite skeleton of cement concrete and resin concrete, the resin composition primer composition of the present invention can exhibit excellent properties that are not available in the past. .

Claims (10)

[Claims] 1. (a) A polyfunctional (meth) acrylate having two or more ethylenically unsaturated double bonds in one molecule,
An impregnating composition comprising (b) a monofunctional (meth) acrylate, (c) a polymerization initiator, and (d) a decomposition accelerator. 2. (a) A polyfunctional (meth) acrylate having two or more ethylenically unsaturated double bonds in one molecule,
A primer composition for resin concrete, which comprises (b) a monofunctional (meth) acrylate, (c) a polymerization initiator, and (d) a decomposition accelerator. 3. A polyfunctional (meth) acrylate having (a) two or more ethylenically unsaturated double bonds in one molecule,
(B) monofunctional (meth) acrylate, (c) polymerization initiator, (d) decomposition accelerator, and (e) polyfunctional (meth) having no two or more ethylenically unsaturated double bonds in one molecule. A primer composition for resin concrete, comprising an acrylate. 4. A primer composition for resin concrete, wherein the decomposition accelerator according to claim 2 or 3 contains a metal salt of an organic acid and / or an organometallic chelate compound. 5. A cured product of the primer composition for resin concrete according to claim 2, claim 3 or claim 4. 6. A method for applying a primer composition for resin concrete, which comprises applying the primer composition for resin concrete according to claim 2, 3 or 4 to cement concrete. 7. Cement concrete, characterized in that resin concrete is applied to the surface obtained by applying the primer composition for resin concrete according to claim 2, 3 or 4 to cement concrete. Composite frame with resin concrete. 8. A composite skeleton of cement concrete and resin concrete, wherein the resin concrete according to claim 7 is a radical-polymerizable resin concrete. 9. Cement concrete, characterized in that resin concrete is applied to the surface obtained by applying the primer composition for resin concrete according to claim 2, 3 or 4 to cement concrete. A method for manufacturing a composite skeleton with resin concrete. 10. The method for producing a composite skeleton of cement concrete and resin concrete, wherein the resin concrete according to claim 9 is a radical-polymerizable resin concrete.