阅读说明：本技术 聚合物胶乳组合物及其用途 (Polymer latex composition and use thereof ) 是由 清藤涯斗 小林直纪 萩原尚吾 阿部靖 于 2018-06-20 设计创作，主要内容包括：提供一种聚合物胶乳组合物,其能够用于对混凝土、砂浆等硬质的被粘物的粘接强度良好的双组分型粘接剂。提供一种聚合物胶乳组合物,其用于包含聚合物胶乳组合物和具有异氰酸酯基作为官能团的固化剂组合物的混合胶乳组合物,相对于聚合物100质量份,含有：表面活性剂成分以固体成分计15～100质量份、和金属氢氧化物30～600质量份。(Provided is a polymer latex composition which can be used for a two-component adhesive having good adhesive strength to a hard adherend such as concrete or mortar. Provided is a polymer latex composition for a hybrid latex composition comprising a polymer latex composition and a curing agent composition having an isocyanate group as a functional group, the polymer latex composition containing, per 100 parts by mass of a polymer: 15 to 100 parts by mass of a surfactant component and 30 to 600 parts by mass of a metal hydroxide, based on the solid content.)

1. A polymer latex composition for a hybrid latex composition comprising a polymer latex composition and a curing agent composition having an isocyanate group as a functional group,

contains, per 100 parts by mass of the polymer:

15 to 100 parts by mass of a surfactant component in terms of solid content, and

30 to 600 parts by mass of a metal hydroxide.

2. The polymer latex composition according to claim 1, wherein the concentration of the nonionic emulsifier in the surfactant component is 20 to 100 mass% in terms of solid content.

3. The polymer latex composition according to claim 2, wherein the nonionic emulsifier is polyvinyl alcohol having a degree of saponification of 70.0 to 96.5 mol%.

4. The polymer latex composition according to any one of claims 1 to 3, wherein the metal hydroxide is aluminum hydroxide.

5. The polymer latex composition according to any one of claims 1 to 4, wherein the polymer is a chloroprene type polymer.

6. A mixed latex composition comprising 100 parts by mass of the polymer latex composition according to any one of claims 1 to 5, and

10 to 200 parts by mass of a curing agent composition having an isocyanate group as a functional group.

7. An adhesive composition using the mixed latex composition according to claim 6.

8. A cured product of the adhesive composition according to claim 7.

9. A civil repairing/reinforcing material using the cured product according to claim 8.

10. A water-stopping material comprising the cured product according to claim 8.

11. An exfoliation material using the cured product according to claim 8.

12. A surface coating material comprising the cured product according to claim 8.

13. A method for repairing/reinforcing a civil engineering structure, comprising the steps of:

a step of applying or injecting or blowing the adhesive composition according to claim 7 to an adherend, and

and curing the adhesive composition.

14. A water stop construction method, wherein the following steps are performed:

a step of applying or injecting or blowing the adhesive composition according to claim 7 to an adherend, and

and curing the adhesive composition.

15. An anti-peeling construction method, wherein the following steps are performed:

a step of applying or injecting or blowing the adhesive composition according to claim 7 to an adherend, and

and curing the adhesive composition.

16. A surface coating method, wherein the following steps are performed:

a step of applying or injecting or blowing the adhesive composition according to claim 7 to an adherend, and

and curing the adhesive composition.

Technical Field

The present technology relates to polymer latex compositions. More specifically, the present invention relates to a polymer latex composition used for a mixed latex composition containing a polymer latex composition and a curing agent composition having an isocyanate group as a functional group, a mixed latex composition containing the polymer latex composition and the curing agent composition, an adhesive composition using the mixed latex composition, a cured product using the adhesive composition, use of the cured product, and a civil engineering repair/reinforcement construction method using the adhesive composition.

Background

In the field of adhesives, studies have been made on two-component adhesives as a technique for improving adhesive strength. For example, patent document 1 discloses an adhesive composition containing a main agent in an emulsion state composed of a polymer emulsion containing a polyol having two or more hydroxyl groups reactive with isocyanate groups, and a curing agent containing a polyisocyanate compound, and patent document 2 discloses a two-component adhesive containing an emulsion-type aqueous adhesive and an adhesion promoter having water absorption, a phase inversion action and/or a thickening action with respect to the adhesive.

In addition, studies have been made on a two-component adhesive using a chloroprene type polymer as a main agent, which is known to be excellent in heat resistance, weather resistance, ozone resistance, chemical resistance and the like and to have balanced properties as compared with natural rubber, other synthetic resins and the like. For example, patent document 3 discloses a two-pack type adhesive composition comprising a main component containing 1 to 100 parts by weight of an acrylic or/and SBR latex solid content and 0.01 to 10 parts by weight of a nonionic and/or anionic surfactant in 100 parts by weight of the solid content of an anionic polymer latex composition, and a polyvalent metal salt as a curing agent, and patent document 4 discloses a two-pack type aqueous polychloroprene adhesive comprising a main component containing a polymer latex composition obtained by emulsion-copolymerizing chloroprene and at least 2, 3-dichloro-1, 3-butadiene and a tackifier resin, and a curing agent containing an aqueous dispersion type isocyanate compound.

However, the two-component adhesives described in patent documents 1 to 4 do not provide sufficient adhesive strength to hard adherends such as concrete and mortar. Further, since the stability of the latex as the main agent is insufficient and aggregates are generated when the main agent and the curing agent are mixed in advance, the use thereof is limited to a two-component separation type, and there is a problem in terms of practicality. Further, there is a problem that sufficient adhesive strength cannot be obtained even for an adherend in a wet state.

Disclosure of Invention

Problems to be solved by the invention

A main object of the present technology is to provide a polymer latex composition that can be used for a two-component adhesive having good adhesive strength to a hard adherend such as concrete or mortar.

Means for solving the problems

As a result of intensive studies on components for improving the adhesive strength in order to solve the above problems, the inventors of the present application have unexpectedly found that metal hydroxides, which have been conventionally used for improving flame retardancy, also contribute to the improvement of the adhesive strength. However, when an attempt is made to blend a metal hydroxide in a specific amount or more in order to improve the adhesive strength, it is found that there is a problem that the metal hydroxide is precipitated in the latex. As a result of further studies, it has been found that the precipitation of the metal hydroxide in the latex can be prevented by blending a specific amount of the surfactant, and that the adhesive strength can be further improved by the synergistic effect of the surfactant and the metal hydroxide, and the present technology has been completed.

That is, the present technology first provides a polymer latex composition for a hybrid latex composition comprising a polymer latex composition and a curing agent composition having an isocyanate group as a functional group,

contains, per 100 parts by mass of the polymer:

15 to 100 parts by mass of a surfactant component in terms of solid content, and

30 to 600 parts by mass of a metal hydroxide.

In the polymer latex composition of the present technology, the concentration of the nonionic emulsifier in the surfactant component may be set to 20 to 100 mass% based on the solid content.

In this case, polyvinyl alcohol having a saponification degree of 70.0 to 96.5 mol% can be used as the nonionic emulsifier.

In the polymer latex composition of the present technology, aluminum hydroxide can be used as the metal hydroxide.

In the polymer latex composition of the present technology, a chloroprene type polymer latex can be used as the polymer latex.

The present technology next provides a hybrid latex composition comprising:

100 parts by mass of the above-mentioned polymer latex composition of the present technology, and

10 to 200 parts by mass of a curing agent composition having an isocyanate group as a functional group.

The hybrid latex composition of the present technology can be used in an adhesive composition.

The present technology further provides a cured product obtained by curing the adhesive composition of the present technology.

The cured product of the present technology can be used for civil engineering repair/reinforcement materials such as water-stop materials, peeling-preventing materials, surface-coating materials and the like.

The present technology also provides a civil engineering repair/reinforcement construction method such as a water stop construction method, a peeling prevention construction method, a surface coating construction method, and the like, wherein the following steps are performed:

a step of applying or injecting or blowing the above adhesive composition of the present technology to an adherend, and

and curing the adhesive composition.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present technology, a polymer latex composition which can be used for a two-component adhesive having good adhesive strength to a hard adherend such as concrete or mortar can be provided.

Drawings

Fig. 1 is a plan view (reference character a), a front view (reference character B), and a side view (reference character C) showing a concrete body used in a water stopping performance test.

Fig. 2 is a perspective view showing the concrete body 1 used in the water stopping performance test.

Detailed Description

Preferred embodiments for carrying out the present technology will be described below. The embodiments described below are merely examples of representative embodiments of the present technology, and the scope of the present technology is not narrowly construed.

< Polymer latex composition >

The polymer latex composition of the present embodiment is used for a hybrid latex composition containing the polymer latex composition and a curing agent composition having an isocyanate group as a functional group, and contains at least a polymer as a base, a surfactant component, and a metal hydroxide. The components used in the polymer latex composition of the present embodiment will be described in detail below.

(1) Polymer and method of making same

As the polymer used in the polymer latex composition of the present embodiment, one or two or more known polymers can be freely selected and used as long as they can be used in addition to the main component of the two-component type adhesive. Examples thereof include butadiene polymers, styrene-butadiene copolymers, styrene-methyl methacrylate-butadiene copolymers, acrylonitrile-butadiene copolymers, chloroprene polymers, vinyl chloride polymers, vinylidene chloride polymers, ethylene-vinyl acetate copolymers, acrylate-methyl methacrylate copolymers, acrylate-styrene copolymers, acrylate-ethylene copolymers, silicone-acrylate copolymers, isoprene polymers, natural rubbers, olefin polymers, and urethane polymers.

Among these, in the present embodiment, a chloroprene type polymer is preferably used as the polymer. The chloroprene-based polymer is a homopolymer of 2-chloro-1, 3-butadiene (hereinafter, simply referred to as "chloroprene") or a copolymer obtained by copolymerizing chloroprene and one or more copolymerizable monomers.

Examples of the monomer copolymerizable with chloroprene include 2, 3-dichloro-1, 3-butadiene, 1-chloro-1, 3-butadiene, isoprene, styrene, acrylonitrile, acrylic acid and esters thereof, methacrylic acid and esters thereof, and two or more of them may be used as necessary.

On the other hand, chloroprene polymers are broadly classified into sulfur-modified chloroprene polymers and non-sulfur-modified chloroprene polymers depending on the polymerization method, and non-sulfur-modified chloroprene polymers are further classified into thiol-modified chloroprene polymers and xanthogen-modified chloroprene polymers depending on the kind of the molecular weight modifier. The sulfur-modified chloroprene type polymer is obtained by copolymerizing a raw material monomer containing chloroprene as a main component with sulfur, plasticizing the obtained copolymer with thiuram disulfide, and adjusting the plasticized copolymer to a predetermined mooney viscosity.

On the other hand, the mercaptan-modified chloroprene type polymer can be obtained by using an alkyl mercaptan such as n-dodecyl mercaptan, t-dodecyl mercaptan, or octyl mercaptan as a molecular weight modifier. The xanthogen-modified chloroprene type polymer can be obtained by using an alkylxanthogen compound as a molecular weight modifier. The chloroprene type polymer that can be used in the present embodiment may be any of the various chloroprene type polymers described above.

The chloroprene type polymer can be classified into, for example, a type having a low crystallization rate, a type having an intermediate crystallization rate, and a type having a high crystallization rate, based on the crystallization rate. In the present embodiment, any of the above-described types of chloroprene type polymers can be used, and can be appropriately selected and used depending on the application and the like.

The method for producing the chloroprene type polymer is not particularly limited, and the raw material monomers may be polymerized by a generally used emulsion polymerization method in the presence of a surfactant, a polymerization initiator, a molecular weight modifier, and the like.

As the polymerization initiator, for example, a known polymerization initiator generally used for emulsion polymerization of chloroprene, such as organic peroxides, e.g., potassium persulfate, ammonium persulfate, sodium persulfate, hydrogen peroxide, and t-butyl hydroperoxide, can be used.

The polymerization temperature in the emulsion polymerization is not particularly limited, but is preferably 0 to 50 ℃ and more preferably 20 to 50 ℃ from the viewpoint of productivity and polymerization stability. The final conversion of the monomer is also not particularly limited, and is preferably in the range of 60 to 100% from the viewpoint of productivity.

Then, a small amount of a polymerization inhibitor is added to the polymerization solution at a point in time when the final conversion rate reaches a predetermined range to terminate the polymerization reaction, whereby a chloroprene-based polymer can be produced.

In this case, as the polymerization inhibitor, for example, a commonly used polymerization inhibitor such as thiodiphenylamine, 4-tert-butylcatechol, or 2, 2-methylenebis-4-methyl-6-tert-butylphenol can be used.

The chloroprene type polymer after the polymerization reaction may be subjected to a stripping process or the like to remove unreacted monomers, and the pH of the latex may be adjusted.

Although the chloroprene type polymer in the present technology is not particularly limited, the toluene-insoluble content of the chloroprene (co) polymer is preferably 20 to 99%.

(2) Surface active agent

The polymer latex composition of the present embodiment contains a surfactant component in an amount of 15 to 100 parts by mass, particularly preferably 20 to 95 parts by mass, based on 100 parts by mass of the polymer, in terms of solid content.

When the content of the surfactant is less than 15 parts by mass, aggregation and precipitation of rubber may occur immediately upon mixing with a curing agent composition having an isocyanate group as a functional group (hereinafter, also simply referred to as "isocyanate compound") described later, and a uniform cured product may not be obtained, or the obtained cured product may have poor adhesive strength to a hard adherend such as concrete or mortar. Further, by setting the content of the surfactant to 15 parts by mass or more, the sedimentation of the metal hydroxide described later in the polymer latex can be suppressed. On the other hand, if the surfactant is contained in an amount of more than 100 parts by mass, excessive bubbles are observed, and operations such as compounding and coating may be hindered.

The polymer latex composition of the present embodiment contains a surfactant used in the production of a polymer, but a surfactant may be added after polymerization. That is, the amount of the surfactant contained in the polymer latex composition can be appropriately adjusted.

Here, the surfactant means an emulsifier which forms micelles (aggregates of the surfactant) in an aqueous medium. The surfactant used in the present embodiment is not particularly limited, and one or two or more kinds of known surfactants can be freely selected and used, and examples thereof include: anionic emulsifiers such as salts of rosin acid, salts of fatty acid, alkylsulfonic acid salts such as sodium alkylbenzenesulfonate, alkylsulfuric acid ester salts such as sodium lauryl sulfate, nonionic emulsifiers such as polyoxyethylene alkyl ether, cellulose derivatives, polyoxyethylene alkylaryl ether, polyoxyethylene styrylphenyl ether, polyoxyalkylphenyl ether, polyoxyalkylene alkyl ether, polyoxyethylene-acetylene glycol ether, polyoxyethylene sorbitan fatty acid ester, higher fatty acid alkanolamide, and polyvinyl alcohol; cationic emulsifiers such as alkylamine salts and quaternary ammonium salts.

[ nonionic emulsifiers ]

In the polymer latex composition of the present embodiment, the concentration of the nonionic emulsifier in the surfactant may be set to 20 to 100% by mass in terms of solid content, as required. This provides a stable polymer latex composition which contributes to stable curing when an isocyanate compound described later is mixed therewith, and as a result, the cured product exhibits good adhesive strength to a hard adherend such as concrete or mortar. By setting the concentration of the nonionic emulsifier in the surfactant to 20% by mass or more, the stability of the polymer latex composition can be further improved, and it becomes unnecessary to suppress the blending amount of the isocyanate compound described later, and the adhesive strength of the obtained cured product to a hard adherend such as concrete or mortar can be further improved.

[ polyvinyl alcohol ]

In the polymer latex composition of the present embodiment, a part or all of the nonionic emulsifier may be polyvinyl alcohol.

The polyvinyl alcohol is not particularly limited in kind, and preferably contains a polyvinyl alcohol having a saponification degree of 70.0 to 96.5 mol% from the viewpoint of further improving the stability of the polymer latex composition. By using polyvinyl alcohol having a saponification degree of 70.0 mol% or more and 96.5 mol% or less, the stability of the polymer latex composition can be further improved, and the restriction of the blending amount of the isocyanate compound described later can be eliminated, whereby the adhesive strength of the obtained cured product to a hard adherend such as concrete and mortar can be further improved.

The polymerization degree of the polyvinyl alcohol is not particularly limited, and from the viewpoint of further improving the stability of the polymer latex composition, it is preferable to contain a polyvinyl alcohol having a polymerization degree of 200 to 4500. By using a polyvinyl alcohol having a polymerization degree of 200 to 4500, the restriction of the isocyanate compound described later is eliminated, and the adhesive strength of the obtained cured product to a hard adherend such as concrete or mortar can be improved.

Here, the polyvinyl alcohol is a polymer obtained by saponifying a homopolymer of a vinyl ester monomer or a copolymer of a vinyl ester monomer and a monomer copolymerizable therewith.

The vinyl ester monomer is not particularly limited, and examples thereof include vinyl formate, vinyl acetate, vinyl propionate, vinyl valerate, vinyl caprate, vinyl laurate, vinyl stearate, vinyl benzoate, vinyl pivalate, and vinyl versatate. Among these, vinyl acetate excellent in stability during polymerization is particularly preferably used.

In the production of polyvinyl alcohol, other monomers copolymerizable with the above-mentioned monomers may be copolymerized as necessary. In this case, the copolymerizable monomer is not particularly limited, and examples thereof include: olefins such as ethylene, propylene, 1-butene and isobutylene; unsaturated acids such as acrylic acid, methacrylic acid, crotonic acid, phthalic acid, maleic acid, and itaconic acid, and salts thereof; acrylamides, C1-18N-alkylacrylamides, N-dialkylacrylamides, diacetoneacrylamides, 2-acrylamidopropanesulfonic acid and salts thereof, acrylamidopropyldimethylamine and salts thereof or quaternary salts thereof, methacrylamides, C1-18N-alkylmethacrylamides, N-dialkylmethacrylamides, diacetone methacrylamide, 2-methacrylamidopropanesulfonic acid and salts thereof; methacrylamides such as 3, 4-diacetoxy-1-butene, glycerol monoallyl ether, methacrylamidopropyldimethylamine and salts or quaternary salts thereof; vinyl ethers such as alkyl vinyl ether, hydroxyalkyl vinyl ether and alkoxyalkyl vinyl ether having an alkyl chain length of 1 to 18 carbon atoms; n-vinylamides such as N-vinylpyrrolidone, N-vinylformamide and N-vinylacetamide; vinyl cyanides such as acrylonitrile and methacrylonitrile; halogenated ethylenes such as vinyl chloride, vinylidene chloride, vinyl fluoride, vinylidene fluoride, vinyl bromide, and vinylidene bromide; vinylsilanes such as trimethoxyvinylsilane; allyl compounds such as allyl acetate, allyl chloride, allyl alcohol, and dimethylallyl alcohol; vinyl silyl compounds such as vinyltrimethoxysilane, and isopropenyl acetate.

The amount of the other copolymerizable monomer is not particularly limited, but is preferably 0.001 mol% or more and less than 20 mol% based on the total amount of the monomers.

The method for polymerizing these monomers is not particularly limited, and a known radical polymerization method can be used. In general, the polymer can be produced by solution polymerization using an alcohol such as methanol, ethanol, or isopropyl alcohol as a solvent, or can be produced by bulk polymerization, emulsion polymerization, suspension polymerization, or the like. In the case of bulk polymerization or solution polymerization, the polymerization may be carried out continuously or in a batch manner. The monomer may be fed at one time, may be fed in several times, or may be continuously or intermittently added.

The polymerization initiator used in the radical polymerization is not particularly limited, and azo compounds such as azobisisobutyronitrile, azobis-2, 4-dimethylvaleronitrile and azobis (4-methoxy-2, 4-dimethylvaleronitrile), peroxides such as acetyl peroxide, benzoyl peroxide, lauroyl peroxide, acetylcyclohexylsulfonyl peroxide and 2,4, 4-trimethylpentyl-2-peroxyphenoxyacetate, percarbonate compounds such as diisopropyl peroxydicarbonate, di-2-ethylhexyl peroxydicarbonate and diethoxyethyl peroxydicarbonate, peroxy ester compounds such as tert-butyl peroxyneodecanoate, α -cumyl peroxyneodecanoate and tert-butyl peroxyneodecanoate, and known radical polymerization initiators such as azobisdimethylvaleronitrile and azobismethoxyvaleronitrile can be used.

The saponification conditions in the production of polyvinyl alcohol are also not particularly limited, and the polymer obtained by the above-mentioned method may be saponified by a known method. Generally, this can be performed by hydrolyzing an ester portion in the molecule in the presence of a base catalyst or an acid catalyst. In this case, the concentration of the copolymer in the alcohol as the polymerization solvent is not particularly limited, and is preferably 10 to 80% by mass.

As the alkali catalyst used in this case, for example, hydroxides and alkoxides of alkali metals such as sodium hydroxide, potassium hydroxide, sodium methoxide, sodium ethoxide, and potassium methoxide can be used. As the acid catalyst, for example, an aqueous solution of an inorganic acid such as hydrochloric acid or sulfuric acid, or an organic acid such as p-toluenesulfonic acid can be used, and sodium hydroxide is particularly preferably used.

The temperature of the saponification reaction is also not particularly limited, but is preferably in the range of 10 to 70 ℃. The reaction time is not particularly limited, and is preferably in the range of 30 minutes to 3 hours.

(3) Metal hydroxides

The polymer latex composition of the present embodiment is characterized by containing the metal hydroxide in an amount of 30 to 600 parts by mass, preferably 50 to 600 parts by mass, and more preferably 100 to 600 parts by mass, based on 100 parts by mass of the polymer. The polymer latex composition of the present embodiment has extremely high adhesive strength when made into an adhesive due to the synergistic effect of the surfactant component and the metal hydroxide. Further, by blending a metal hydroxide, flame retardancy can be improved when the polymer latex composition of the present embodiment is used as an adhesive.

When the content of the metal hydroxide is less than 30 parts by mass per 100 parts by mass of the polymer, sufficient adhesive strength may not be obtained when the polymer latex composition of the present embodiment is used as an adhesive. When the amount exceeds 600 parts by mass, the metal hydroxide may not be uniformly dispersed, and a uniform adhesive composition may not be formed, and sufficient adhesive strength may not be obtained.

As the present embodimentThe metal hydroxide used in the polymer latex composition of formula (iii) is not particularly limited as long as the effect of the present technology is not impaired, and one or two or more kinds of known metal hydroxides can be freely selected and used. Examples thereof include magnesium hydroxide (Mg (OH)₂) Aluminum hydroxide (Al (OH)₃) Copper hydroxide (Cu (OH)₂) Nickel hydroxide (Ni (OH))₂) Iron (II) hydroxide (Fe (OH)₂) Iron (III) hydroxide (Fe (OH))₃) Tin hydroxide (Sn (OH))₂) Chromium (III) hydroxide (Cr (OH)₃) Manganese hydroxide (Mn (OH))₂) Cadmium hydroxide (Cd (OH)₂) And the like. Among these, aluminum hydroxide is particularly preferable in the present embodiment from the viewpoint of having a high effect of providing flame retardancy.

(4) Other ingredients

The polymer latex composition of the present embodiment may contain a tackifier resin, a pH adjuster, a metal oxide, a plasticizer, an antioxidant, a thickener, a reducing agent, an antifoaming agent, and a filler in addition to the above components, and these other components may be additionally blended in the polymer latex composition after polymerization.

As described above in detail, since the polymer latex composition of the present embodiment contains a specific amount of the surfactant, the latex can be stably subjected to curing without lowering the stability of the latex. In addition, the cured product exhibits good adhesive strength to a hard adherend such as concrete or mortar due to a synergistic effect of a specific amount of a surfactant and a specific amount of a metal hydroxide. In addition, the polymer latex composition of the present embodiment can further improve the above-mentioned effects by containing a nonionic emulsifier at a specific concentration in the surfactant component or by using a specific polyvinyl alcohol as the nonionic emulsifier.

< adhesive composition and cured product thereof >

The adhesive composition of the present embodiment is a mixed latex composition obtained by mixing the polymer latex composition of the present embodiment with a curing agent composition having an isocyanate group as a functional group, and the cured product is obtained by applying or injecting the adhesive composition and curing the adhesive composition.

The amount of the isocyanate compound to be mixed is not limited, and is preferably 10 to 200 parts by mass per 100 parts by mass of the polymer latex composition. When the adhesive composition using the mixed latex composition in which the isocyanate compound is mixed is applied or injected and cured by setting the amount of the isocyanate compound to 10 parts by mass or more, curing is sufficiently performed. Further, by setting the amount to 200 parts by mass or less, generation of aggregates at the time of mixing the isocyanate compound can be prevented, a uniform cured product can be obtained, and the adhesive strength of the obtained cured product to a hard adherend such as concrete or mortar can be further improved.

The isocyanate compound in the present technology is not particularly limited, and there may be mentioned one or two or more kinds of diisocyanate compounds other than diisocyanate compounds, water-curable polyurethane resins, and the like, and there may be mentioned, for example, phenylene diisocyanate, toluene diisocyanate, xylylene diisocyanate, tetramethylxylylene diisocyanate, 4 '-biphenyldiisocyanate, 3' -dimethyl-4, 4 '-diphenylmethane diisocyanate, triphenylmethane diisocyanate, 3' -dimethyl-4, 4 '-biphenyldiisocyanate, 4' -diphenylmethane diisocyanate, naphthalene diisocyanate, isophorone diisocyanate, cyclohexylene diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated xylylene diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, and other diisocyanate compounds, such as, for example, diisocyanate compounds such as, bisphenol triisocyanate, diphenylmethane triisocyanate, triphenylmethane triisocyanate, naphthalene triisocyanate, and other polyol compounds such as, for example, a polyol compound obtained by polymerizing a polyhydric alcohol compound having a cyanate group in addition to a polyhydric alcohol monomer such as the above-ethylene diamine monomer, a polyhydric alcohol compound such as, a bisphenol diamine monomer, a bisphenol polyol compound having a urethane group, a urethane monomer, a carboxyl group, a glycidyl ester, a polyol compound having a carboxyl group, a polyol compound such as a polyol, a polyol compound having a carboxyl group, a polyol such as a polyol, a polyol compound having a polyol such as a polyol compound, a polyol such as a polyol ester, a polyol compound, a polyol ester, a polyol compound, a polyol ester, a polyol compound, a polyol such as a polyol ester, a polyol compound, a polyol ester, a polyol compound, a polyol ester, a polyol compound, a polyol ester.

The cured product of the present embodiment has good adhesive strength to a hard adherend such as concrete or mortar because of using the polymer latex composition. More specifically, the adhesive exhibits good adhesive strength to a hard adherend such as concrete, mortar, wood, glass, ceramics, metals such as iron, zinc, and copper, and plastics such as polypropylene and polyethylene. In particular, as shown in examples described later, sufficient adhesive strength can be obtained even for an adherend in a wet state. Therefore, the cured product can be used for filling a cavity of a foundation, a surface coating material for concrete or mortar, an application to a crack or a back surface, a water-stopping material, a waterproof material, a peeling-preventing material, a joint portion, a filler for a joint portion, and an application to civil engineering repair and reinforcement for the purpose of absorbing vibration, and an application to a building.

Civil repairing/strengthening construction method

The adhesive composition of the present embodiment can be used in a civil engineering repair/reinforcement construction method by utilizing its high adhesive strength and flame retardancy. Examples of the civil engineering repair/reinforcement construction method include a water stop construction method, a peeling prevention construction method, a surface coating construction method, a fracture repair construction method, a surface impregnation construction method, a pre-filled aggregate construction method, a crack injection construction method, an RC coating construction method, a steel plate coating construction method, a carbon fiber reinforcement construction method, a carbon fiber sheet on-site bonding construction method, an aramid fiber sheet bonding construction method, a water guide construction method, a steel plate bonding construction method, a stringer addition construction method, a backfill injection construction method, a buried joint construction method, porous concrete pavement, and open early traffic concrete pavement.

The adhesive composition of the present embodiment is preferably used in the water stopping construction method in the above-described civil engineering repair/reinforcement construction method. The water stopping construction method comprises the following steps: a construction method for stopping water leakage caused by a crack or a gap in a piping, a corrugated pipe, a concrete structure, or the like of an agricultural waterway. For example, there are a back injection water-stopping construction method in which water is stopped by solidifying a water-stopping material between the back surface of a concrete structure and a covered soil in contact with the back surface as in japanese patent application laid-open No. 2014-208970, and a high-pressure injection water-stopping construction method in which a water-stopping material is injected under pressure into a water leakage crack of a concrete structure as in japanese patent application laid-open No. 2004-251007. The adhesive composition of the present embodiment can be used as a water-stopping material for the water-stopping application method without particular limitation.

The adhesive composition of the present embodiment is preferably used in the above-described method of anti-peeling application in the civil engineering repair/reinforcement application method. The anti-stripping construction method comprises the following steps: a method of construction which prevents defects such as cracks generated during the construction of a concrete structure, cracks, damages such as peeling caused by earthquakes or impacts, and the peeling of a concrete block caused by deterioration caused by neutralization, salinization, an alkalization reaction of an aggregate, etc. Examples of the method include a method of applying a resin composition to a concrete surface in a single layer as disclosed in Japanese patent application laid-open Nos. 2014-77287 and a method of using a laminate by using one or two types of primers as disclosed in Japanese patent application laid-open Nos. 2004-18719 and 2011-52457. The method of applying the adhesive composition of the present embodiment for peeling prevention is not particularly limited, and the adhesive composition can be used as a peeling prevention material in these methods for peeling prevention.

In the method of applying the adhesive composition of the present embodiment for peeling prevention, short fibers, a mesh sheet, and a primer may be used in combination as necessary.

The adhesive composition of the present embodiment is preferably used in the surface coating application method in the civil engineering repair/reinforcement application method described above. The surface coating construction method comprises the following steps: as a method of applying the coating for the purpose of protecting the corrosion phenomenon of steel materials in concrete and the purpose of protecting concrete from the outside, for example, there is a method of applying polymer cement mortar as a surface coating material as disclosed in japanese patent laid-open No. 2012-207449. The method of applying the surface coating of the adhesive composition of the present embodiment is not particularly limited, and the adhesive composition can be used as a surface coating material in such a method of applying the surface coating. The adhesive composition may be used as a single layer, or may be used in a construction method in which a laminate is produced by combining with another material.

The civil engineering repair/reinforcement work method of the present embodiment is a method for performing at least the following steps: a step of applying, injecting or blowing the adhesive composition onto an adherend; and a step of curing the mixed latex composition. In addition, various known processes specific to each construction method may be freely selected and performed in addition to these processes as long as the effects of the present technology are not impaired.

The method for applying or injecting the adhesive composition to the adherend is not particularly limited as long as the effects of the present technology are not impaired, and a known method can be freely employed. Examples thereof include a method of coating with bristles and a method of injecting with a caulking gun.

The method of curing the adhesive composition is not particularly limited as long as the effects of the present technology are not impaired, and a known method can be freely employed, and the adhesive composition of the present embodiment can be cured, for example, by: the coating or injection is applied to an adherend, molding or application is performed, and then the adherend is left in this state for a predetermined time.