JP2000256646A - Repair grout and repair injection method for concrete construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repair grout for concrete constructions which has a good storage stability and, when injected, cures rapidly by compounding a polyepoxy compound with a heterocyclic compound. SOLUTION: This grout comprises a polyepoxy compound and a heterocyclic compound having at least two heterocyclic groups represented by the formula (wherein R is a 2-10C linear or branched alkylene group optionally having -O and/or -S-; R1 and R2 are each independently H, a 1-6C linear or branched alkyl or alkenyl group or a 6-8C aryl group provided they may conbine with each other to form, together with carbon atoms to which they are bonded, a 5-7C cycloalkyl ring: and R3 is a 1-10C alkylene group). An example of the heterocyclic compound is a compound having at least one kind of a main chain selected from among a hydrocarbon, a polyether, a polyvinyl, a polyester, a polyamide, a polycarbonate, etc., optionally having hydroxyl groups on the side chains.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injectable agent for repairing concrete structures, and more particularly, to injecting or injecting an injectable agent into concrete or mortar of buildings or structures, or reinforcing soft soil. The present invention relates to a novel epoxy resin-based injection agent which can be rapidly cured at room temperature by moisture and a repair injection method using the same.

[0002]

2. Description of the Related Art Cracks in concrete or mortar or defects in floating parts may cause secondary disasters such as rainwater intrusion or peeling off. There is a one-pack type epoxy resin-based repair injection agent that uses a reactive curing agent.

[Problems to be solved by the invention]

However, a repair injection using ketimine has insufficient storage stability and a low curing rate,
There is a problem that it is difficult to reuse the unused epoxy resin remaining in the substantial cartridge in terms of workability and physical properties of the cured product.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, by using an epoxy resin-based repairing filler using a heterocyclic-containing compound as a latent curing agent, The inventors have found that the above problem can be solved, and have completed the present invention. That is, the present invention
Injection for repairing concrete construction and repair using the same, comprising a heterocyclic group-containing compound (A) having two or more heterocyclic groups (Z) represented by the following general formula (1) and a polyepoxy compound. This is an injection method.

[0005]

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(Wherein R is a linear or branched alkylene group having 2 to 10 carbon atoms which may contain -O- and / or -S-, R ¹ and R ² are the same and And may represent a hydrogen atom, a linear or branched alkyl or alkenyl group having 1 to 6 carbon atoms, or an aryl group having 6 to 8 carbon atoms, or R ¹ and together with the carbon atom to which R ² is attached, .R ³ representing a cycloalkyl ring having 5 to 7 carbon atoms, 1 to carbon atoms
Represents 10 alkylene groups. )

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The heterocyclic-containing compound of the present invention is not particularly limited as long as it has two or more Zs represented by the above general formula (1). , Polyvinyl, polyester, polyamide, polycarbonate, and novolak, and at least one selected from the group consisting of hydrocarbons optionally having a hydroxyl group.
Heterocycle-containing compounds having a different main chain and having at least two Z's at the terminal or side chains are included.

In the general formula (1), R¹And R^Twoage
Specifically, for example, for example, a hydrogen atom;
, N- and i-propyl, n-, i-, s- and t-
Butyl, n-, i- and t-pentyl, neopentyl,
n- and i-hexyl groups; and vinyl, allyl, pro
Phenyl, butenyl and hexenyl groups; phenyl, tri
, Xylyl, benzyl and phenylethyl groups.
Can be R¹, R^TwoAnd R ¹And R^TwoTo which the carbon is attached
As a cycloalkyl ring in which atoms are joined together,
For example, cyclopentyl, cyclohexyl and cyclohepti
And the like. Of these, in terms of cure speed
R¹And R^TwoAt least one of them is a hydrogen atom,
Or a linear or branched alkyl having 1 to 3 carbon atoms
Group (especially a methyl or ethyl group)
No. R^ThreeSpecifically, for example, methylene, ethyl
Len, 1,2- and 1,3-propylene, tetramethyl
1,2-ethylethylene, pentamethylene, hexa
Examples include methylene, heptamethylene, octamethylene, etc.
Is done. Of these, ethylene,
1,2- and 1,3-propylene, tetramethylene and
Pentamethylene groups are preferred. R is -O- and / or-
C2-C10 linear or branched which may have S-
Alkylene group, for example, ethylene, 1-methyl
Methylene, 1,1-dimethylmethylene, 1-ethylmethyl
Len, 1,2- and 1,3-propylene, tetramethyl
1,1-dimethylethylene, 1-methyltrimethylene
Hexamethylene, 1-methylhexamethylene, octane
A straight or branched chain having 2 to 10 carbon atoms such as a tamethylene group.
Alkylene group, -CH_TwoCH_TwoOCH_TwoCH_Two-, -CH_TwoC
H_TwoCH_TwoOCH_TwoCH_Two-, -C (CH_Three) HCH_TwoOCH
_TwoCH (CH_Three)-, -CH_TwoCH_TwoSCH_TwoCH_Two-, -C
H_TwoCH_TwoCH_TwoSCH_TwoCH_Two-O- having a structure such as-,
Linear or branched alkyl having 2 to 10 carbon atoms having -S-
And a kylene group. Among them, carbon number 2-10
Are preferred, particularly 1-methyl
Tylene groups are preferred.

In the repair injection of the present invention, the heterocyclic-containing compound is a heterocyclic group (Z) represented by the general formula (1):
2 to 50 or more in the side chain and / or the terminal. Preferably, the number is 2 to 20, particularly preferably 2
~ 7. If the number of the heterocyclic groups is less than 2, the curing of the epoxy resin is insufficient, so that the range is limited to the above range. As the heterocyclic-containing compound having a main chain structure composed of a hydrocarbon which may have a hydroxyl group, polyether, polyvinyl, polyester, polyamide, polycarbonate and novolak, the following general formula (2):
(3) having a structure shown in (4), (5) and (6), (7) and (8), (9) and (10),
Those having 2 to 50 or more -XZ groups are exemplified. Those having 2 to 7 -XZ groups are particularly preferable from the viewpoint of hardness and flexibility of the cured product. It does not prevent these main chain structures from being mixed with each other in a random or block manner. Of these main chain structures, (3) to (1)
The main chain structure of (0) is the same as that described in detail in JP-A-09-188744 or US Pat. No. 5,837,785.

[0010]

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The -XZ group is a group represented by -XZ [formula
In the formula, X represents a direct bond or a divalent organic group. Z is above
Represents a heterocyclic group represented by the general formula (1). ].
Examples of the organic group represented by X include, for example, an ether group,
Oether group, carbonate group, ester group, imino
Group, amide group, urethane group, urea group and sulfide group
May have one or more groups selected from the group consisting of
A divalent hydrocarbon group having 1 to 30 or more carbon atoms
Illustrative and specific examples include, for example, -CH_Two-, -C
H_TwoCH_Two-, -CH_TwoOCH_TwoCH_Two-, -CH_TwoS
CH_TwoCH_Two -, -CHO-CO-OCH_Two-, -NH
CONH-, -NH-CO-O-, -CH_TwoNHCH_Two
CH_Two-, -CH_TwoNHCONH (CH_Two)₆NHCO
-O- and -CH_TwoS (CH_Two)_TwoC (= O) O (CH
_Two)_Two-,-(OA^o)_p[OCH_TwoCH (OH) CH_Two]
_r-[A in the formula^o, P and r are the same as in the general formula (11).
Yes] and other groups having such a structure.

Hereinafter, these will be described in detail. The heterocyclic-containing compound (A) having a structure represented by the general formula (2) has a hydrocarbon main chain structure which may have a hydroxyl group in a side chain. In the formula (2), a is 1 to 5
It is an integer of 0. From the viewpoint of the viscosity of the repair injection agent and the hardness of the cured resin, it is preferably 1 to 25, and particularly preferably 1 to 10. A ¹ is a linear or branched alkylene group having 2 to 15 carbon atoms, which may contain a hydroxyl group, or an arylene group having 6 to 50 carbon atoms, and the number of hydroxyl groups represents 0 to 8; The linear or branched alkylene group having 2 to 15 carbon atoms of A ¹ or the arylene group having 6 to 50 carbon atoms is represented by -XZ
A group is substituted or unsubstituted, and when a is 1, A ¹ must contain two -XZ groups.

In the general formulas (3) to (10), b to i are 2 to
It is an integer of 200. From the viewpoint of the viscosity of the repair injection agent and the hardness of the cured resin, b to i are preferably 2 to 100. In the general formula (3), A ² represents an alkylene group having 2 to 30 carbon atoms, which is substituted or unsubstituted with an -XZ group, an arylene group, an arylalkylene group, a haloalkylene group, or glycidyl ether. It represents the residue after ring-opening polymerization. At least two of the b A ^{2 in} the general formula (3) represent an alkylene group substituted with a —XZ group. In terms of hardness of the cured product, ² out of b A 2
Preferably, up to 7 represent an alkylene group substituted with a -XZ group. Specific examples of A ^{2 in} the general formula (3) include methylene, ethylene, trimethylene, 1,
A hydrogen atom of an alkylene group exemplified by 2-propylene, tetramethylene, pentamethylene, hexamethylene, octamethylene, or the like is substituted with an -XZ group (the substitution position is not limited) or substituted. No group ;;
Arylene groups such as phenylene and naphthylene groups; groups in which hydrogen atoms of arylalkylene groups such as phenylethylene and tolylethylene groups are substituted or unsubstituted by -XZ groups; halo groups such as chloroethylene and chloromethylethylene groups A group in which a hydrogen atom of an alkylene group is substituted or unsubstituted by an -XZ group; butyl glycidyl ether, phenyl glycidyl ether, allyl glycidyl ether, 2-ethylhexyl glycidyl ether,
Monoglycidyl ether such as cresyl glycidyl ether, diglycidyl ether, (poly) ethylene glycol (polymerization degree: 2 to 100) diglycidyl ether, (poly) propylene glycol (polymerization degree: 2 to 100) diglycidyl ether, butanediol Diglycidyl ethers such as diglycidyl ether; tri- to 6-functional or higher polyglycidyl ethers such as trimethylolpropane triglycidyl ether;
A residue obtained by ring-opening polymerization of 1 to 6 or more epoxy groups of glycidyl ethers of No. 00; and a hydrogen atom such as a glycidyl ester having a functional group similar to that of glycidyl ether is an -XZ group. Substituted or unsubstituted groups are included.

In the general formula (4), Q ¹ represents a hydrogen atom; an alkyl group having 1 to 30 carbon atoms, an aryl group, a haloalkyl group, a haloaryl group, an alkoxycarbonyl group, an acyloxy group, or an -XZ group. . At least two of the c Q ^{1 in} the general formula (3) represent a —XZ group. From the viewpoint of the hardness of the cured product, 2 to 7 of the c-number for Q ¹ is -
Preferably it represents an XZ group. Specific examples of Q ^{1 in} the general formula (4) include a hydrogen atom; an alkyl group such as methyl and ethyl; an aryl group such as phenyl and tolyl;
Halogen number of 1 to 61 such as chloromethyl and chloroethyl groups
Haloalkyl group; chloromethylphenyl, chloroethylphenyl, 2,4,6-trichlorophenyl, 2,
A haloaryl group such as a 4,6-tribromophenyl group; an alkoxycarbonyl group having 1 to 6 carbon atoms such as a methoxycarbonyl, ethoxycarbonyl, butoxycarbonyl group;
An acyloxy group having 1 to 6 carbon atoms such as an acetoxy group and -X
—Z group and the like.

In the general formulas (5) to (9), A ³ , A ⁴ ,
A ⁵ , A ⁶ , A ⁷ , A ⁸ and A ⁹ are the same or different and are each an alkylene group having 1 to 30 carbon atoms, which is substituted or unsubstituted by an -XZ group, or an -XZ group. Represents a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, an aralkylene group, or a haloalkylene group having 1 to 30 carbon atoms. Specific examples of the above A ^{3 to} A ⁹ include:
A group in which a hydrogen atom of an alkylene group such as methylene, ethylene, propylene, tetramethylene, ethylethylene, hexamethylene, heptamethylene, octamethylene or the like is substituted or unsubstituted by an -XZ group; a phenylene group, a tolylene group Hydrogen atom of the arylene group such as -XZ
A group substituted or unsubstituted with a group; an aralkylene group such as a benzylidene group and an ethylenephenylene group;
Examples include groups in which a hydrogen atom such as a haloalkylene group such as a chloroethylene group, a bromoethylene group, a chloromethylethylene group, or a 1,2-dichloroethylene group is substituted or unsubstituted by an -XZ group. In the general formula (10),
Ar represents an aromatic hydrocarbon group, for example, an alkyl-substituted benzene ring represented by the general formula (12), a substituted phenylene group which is a residue of a phenol novolak resin, a substituted tolylene group which is a residue of a cresol novolak resin. At least two of i in the general formula (10) represent a -XZ group.

[0016]

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(Wherein R ⁰ is a hydrogen atom or a carbon atom 1)
An alkyl group) Q ² of 30 represents a hydrogen atom, a glycidyl group, or -X-Z group. Of these main chain structures, preferably represented by general formulas (2), (3), (4), (6),
It is a main chain structure represented by (9) and (10), more preferably a main chain structure represented by general formulas (2), (3) and (4), and particularly preferably a main chain structure represented by general formula (2) It is the main chain structure shown. In the heterocycle-containing compound having a structure represented by any of the general formulas (2) to (10), the ratio of the group having the -XZ group to the other group, the type of the other group,
By changing the type of the X group and the values of a to i, the viscosity of the heterocyclic compound, the compatibility with the polyepoxy compound,
The hardness of the epoxy resin after curing with the heterocyclic compound,
Physical properties such as flexibility, weather resistance and chemical resistance can be controlled.

The heterocyclic group (Z) of the heterocyclic-containing compound (A) is (i) a compound having at least two secondary amino groups bonded to a hydroxyalkyl group in the molecule [general formulas (2) to ( 10)] and an aldehyde (b1) or a ketone (b
(Ii) a dehydration-condensation reaction of (b) or (b2) with an alkanolamine Michael-added to (meth) acrylic acid ester, and then the product is converted to a hydroxyl group and / or A direct esterification or transesterification reaction with a compound having a glycidyl group [this compound corresponds to a compound represented by formulas (2) to (10) or a monomer] (if the compound is a monomer, it may be further used alone or Copolymerization with a monomer having a functional group capable of reacting with a).
About these manufacturing methods, the same method as the method described in JP-A-9-188744 can be mentioned. Hereinafter, the heterocyclic-containing compound (AA) containing a heterocyclic group (Z) having a structure of the general formula (2), which is a particularly preferable main chain of the general formulas (2) to (10), in the side chain. This will be described in detail. (AA) is represented by the following general formula (11). This is the case where i = 1 in the general formula (11). General formula

[0019]

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[In the formula, A ¹⁰ is a residue obtained by removing a hydroxyl group from k-valent polyhydric alcohols and k-valent polyhydric phenols. A ^o is a linear or branched alkylene group having 2 to 4 carbon atoms, and p and q are 0 or 1 to 1
It is an integer of 0 and may be the same or different.
r is 0 or 1. Z ¹ represents OH or Z. Q ³ is a hydrogen atom or a glycidyl group. m is 1 or an integer of 2 to 10, k is an integer of 2 to 10, and k ≧ m. When m + r ≧ 2 and m = 1, Z ¹ is Z. p,
q, r, A _o, may be different even if the same case where Z ¹ and Q ³ have multiple. In the heterocyclic-containing compound (AA) represented by the general formula (11), A ¹⁰ represents an aliphatic polyhydric alcohol having 2 to 15 carbon atoms or 6 to 15 carbon atoms.
It is a residue obtained by removing a hydroxyl group from 50 or more divalent to 10-valent phenols.

The aliphatic polyhydric alcohols having 2 to 15 carbon atoms include (poly) alkylene glycols having 2 to 15 carbon atoms, for example, ethylene glycol, propylene glycol, 1,3-butylene glycol, 1,4-butyl glycol. Butanediol, 1,6-hexanediol, 3-methylpentanediol, diethylene glycol, neopentyl glycol and the like; an alicyclic diol having 6 to 15 carbon atoms, for example, 1,4-bis (hydroxymethyl) cyclohexane, 2,2 ′ -Bis (4,4'-hydroxycyclohexyl) propane and the like; an aliphatic trihydric alcohol having 3 to 15 carbon atoms, for example, a trihydric alcohol such as glycerin and trimethylolpropane; a 4 to 8 alcohol having 4 to 15 carbon atoms; For example, pentaerythritol, diglycerin, α-
Examples thereof include 4- to 8-hydric alcohols such as methylglucoside, sorbitol, xylitol, mannitol, dipentaerythritol, glucose, fructose, and sucrose. Examples of the divalent to octavalent phenols having 6 to 50 or more carbon atoms (excluding novolaks) include bisphenols such as bisphenol A, bisphenol F and bisphenol S, and monocyclic compounds such as pyrogallol, catechol and hydroquinone. And polyhydric phenols.

In the general formula (11), A ^o is a linear or branched alkylene group having 2 to 4 carbon atoms, and specific examples thereof include ethylene, propylene, isobutylene and tert-butyl.
-Butylene group, preferably propylene, isobutylene, t
An ert-butylene group, particularly preferably a propylene or isobutylene group is mentioned. p or q is 0 or an integer of 1 to 10, and p and q may be the same or different.
Q ³ is a hydrogen atom or a glycidyl group. r is 0 or 1
It is. The heterocycle-containing compound (AA) has a pKa of 7 or less.
A compound represented by the general formula (14) in which an alkanolamine (a2) represented by the formula NH ₂ —R ³ —OH is Michael-added to a methacrylic ester compound (a1) represented by the following general formula (13) having ad) and the formula R ¹ -C
(B) a compound obtained by subjecting a compound (b) represented by (＝ O) —R ² to a cyclization reaction or a Michael addition of (a2) to a methacrylate (a3) represented by the general formula (15);
After cyclization by reacting with a compound having a hydroxyl group and / or a glycidyl group represented by the general formula (16). The latter method is preferred. General formula

[0023]

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[0024] The same as in the general formula (11), R ⁴ is an organic group. n is 0 or an integer of 1 to m, and m ≧ n ≧ 0. ]

In the former production method, the compound represented by the general formula (16) is obtained by adding (i) an alkylene oxide having 2 to 4 carbon atoms to the above-mentioned polyhydric alcohols and polyphenols, (ii) It is obtained by glycidylation with epichlorohydrin, or (iii) by performing (ii) after the above (i). Among the compounds (AA) having the structure represented by the general formula (11), those having m of 2 to 10 and those having m of 1, Z ¹ and Z are useful as epoxy resin curing agents. Preferably, m is 3 to 8. When m is greater than 2, the physical properties of the cured epoxy resin are good, and when m is less than 10, the viscosity does not increase, and the workability when a one-pack epoxy resin composition is used is good. Also, (A
In the case of A), from the viewpoint of the curing rate, at least one of R ¹ and R ² in the general formula (1) is a hydrogen atom or a linear or branched alkyl group having 1 to 3 (particularly 1 to 2) carbon atoms. It is preferred that there be. If heterocyclic ring-containing compound has a formula (1) (Z), has the ester group in the molecular structure, R is -CH (CH ₃₎ CH ₂ -
Is preferred because it has a methacrylic structure and therefore has better hydrolysis resistance and the like than an acrylic structure of —CH ₂ CH ₂ —. Therefore, by setting the carbon atom bonded to Z to a secondary or higher carbon represented by the following general formula (17),
Hydrolysis resistance is dramatically improved. General formula

[0026]

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[Wherein, R ⁵ and R ⁶ are any of a hydrogen atom, a methyl group, an ethyl group, and —CH ₂ —Z, which may be the same or different. However, when the carbon numbers of R ⁵ and R ⁶ are C ⁵ and C ⁶ respectively,
1 ≦ C ⁵ + C ⁶ ≦ 3. This is presumed to be due to the steric hindrance of the ester group on both sides, which limits nucleophilic attack on the ester bond. The above structure may be, for example, (1) an aliphatic polyhydric alcohol having 2 to 15 carbon atoms, or a polyhydric phenol having 6 to 50 or more carbon atoms and 2 to 10 valences, or 1,2 having 3 to 4 carbon atoms. -Or a few
-Reaction with methacrylic acid ester or methacrylic acid after addition of alkylene oxide, (2) secondary reaction of OH of secondary carbon with methacrylic acid (ester) after reacting glycidyl group (introduced by addition of epichlorohydrin) and methacrylic acid. Can be introduced. Therefore, (A) as a component of the repair injection of the present invention
Is part or all of the carbon bonded to Z
If it is manufactured using a (poly) hydroxyl compound or a (poly) epoxy compound such that it becomes carbon of a class or higher, when mixed with a polyepoxy compound and cured,
An epoxy resin cured product having high hydrolysis resistance can be obtained.

As described above, (A) has an ester group in the molecular structure, which has an HLB value (an index indicating hydrophilicity) of about 10 and a functional group having relatively high hydrophilicity. Also known as Further, although it depends on the HLB value of other functional groups contained in the molecular structure, the HL of the heterocyclic group
The B value is about 7.5. Accordingly, the HLB value of (A) used in the repair injection of the present invention is preferably 4 to 15, particularly preferably 6 to 12. When the HLB value of (A) is 4 or more, the hydrolysis rate of the heterocyclic group is increased, and when it is 15 or less, the cured product has good water resistance. This HLB value is based on the Oda method. Since (A) has such an HLB value, it is mixed with a bisphenol-based or novolak-based epoxy resin having a low HLB value, which is usually used as a main agent, to form an epoxy resin-based repairing injectable resin to form three or more. , Preferably having an HLB value of 4 or more.
In addition, since (A) has good compatibility with the polyepoxy compound, the epoxy resin-based filler easily penetrates moisture,
It is presumed to have the feature that the curing speed is very fast. For this reason, the HLB value is one factor that causes the heterocyclic-containing compound to cure faster than the ketimine compound which has been conventionally used as the amine component of the one-pack moisture-curable epoxy resin-based filler. That is, since the HLB value of the heterocyclic group is about 7.5, which is higher than the ketimine group having a value of 1.0 or less, it is estimated that the heterocyclic-containing compound takes in moisture more easily than the ketimine compound, and the curing rate is higher.

In (A), the number average molecular weight is usually 40
0 to 20,000, preferably 600 to 2,000. The number average molecular weight is measured by a gel permeation (GPC) method. TSKge as an example of measurement conditions
1 column (super H4000 + H30 manufactured by Tosoh Corporation)
00 + H2000), GPC-8120 (manufactured by Tosoh Corporation)
Is used. The viscosity at 25 ° C. is usually 200 to 200,000 cp, preferably 400 to 50,000 cp. The molecular weight per one heterocyclic group is usually from 150 to 2,000.
0, and preferably 200 to 500. (A)
Reacts with moisture to form a secondary amine and a corresponding ketone or aldehyde readily bonded to a hydroxyalkyl group. Since the secondary amine bonded to the hydroxyalkyl group easily reacts with the epoxy group, (A) is useful as an epoxy resin curing agent. Since (A) is stable even in a system mixed with an epoxy resin unless water is mixed in from the outside, the repair injection of the present invention can be used as a one-pack type and is very useful. is there.

In the repair injection of the present invention, the compounding amount of the epoxy resin curing agent comprising the heterocyclic compound (A) to the polyepoxy compound is equivalent to the heterocyclic group equivalent (A) represented by the general formula (1). It is preferable that the ratio of the polyepoxy compound to the epoxy equivalent is 0.4 to 2.5, particularly 0.5 to 2.0. By blending within this range, the number of active hydrogens in the secondary amine generated by hydrolysis of the heterocyclic group represented by the general formula (1) per one epoxy group of the polyepoxy compound is reduced. The number may be 0.5 to 2.0, preferably 0.9 to 1.1. When the number of active hydrogen is 0.5
As described above, when the ratio is 2.0 or less, the cured product shows good physical properties without a decrease in water resistance and mechanical strength without a decrease in the curability.

As the polyepoxy compound, 2
It is not particularly limited as long as it has 10 to 10 epoxy groups,
It can be appropriately selected according to the use and purpose. Preferred are those having 2 to 6 epoxy groups in the molecule, and the epoxy equivalent (epoxy group 1) of the polyepoxy compound.
Molecular weight per unit) is usually 65 to 1,000,
Preferred is 90-500. Epoxy equivalent is 1,
When the molecular weight is not more than 000, the crosslinked structure does not become loose and the cured product has good physical properties such as water resistance, chemical resistance and mechanical strength. On the other hand, those having an epoxy equivalent of 65 or more can be easily synthesized. Examples of the polyepoxy compound include the following 1) to 7). 1) Glycidyl ether type (i) Diglycidyl ether of dihydric phenols Diglycidyl ether of dihydric phenols having 6 to 30 carbon atoms, for example, bisphenol F diglycidyl ether,
Bisphenol A diglycidyl ether, bishalogenated bisphenol A diglycidyl ether, tetrachlorobisphenol A diglycidyl ether, catechin diglycidyl ether, resorcinol diglycidyl ether, tetramethylbiphenyl diglycidyl ether,
Diglycidyl ether obtained from the reaction of 2 mol of bisphenol A with 3 mol of epichlorohydrin, etc .;

(Ii) trifunctional to hexafunctional or more,
Polyglycidyl ether of polyhydric phenols having 6 to 50 or more carbon atoms and a molecular weight of 250 to 3000
Polyglycidyl ethers of polyhydric phenols of 3 to 6 or more, such as pyrogallol triglycidyl ether, dihydroxynaphthyl cresol triglycidyl ether, tris (hydroxyphenyl) methane triglycidyl ether, dinaphthyltriol triglycidyl ether, tetrakis ( 4-hydroxyphenyl)
Ethanetetraglycidyl ether, p-glycidylphenyldimethyltolyl bisphenol A glycidyl ether, trismethyl-tert-butyl-butylhydroxymethanetriglycidyl ether, glycidyl ether of phenol or cresol novolak resin, glycidyl ether of limonene phenol novolak resin, resorcinol and acetone The polyglycidyl ether of a polyphenol having a molecular weight of 400 to 5000 obtained by the condensation reaction is exemplified. (Iii) Diglycidyl ether of an aliphatic alcohol Diglycidyl ether of a diol having 2 to 100 carbon atoms and a molecular weight of 150 to 5000, for example, ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, tetramethylene glycol diglycidyl ether, 1,6 -Hexanediol diglycidyl ether, polyethylene glycol (molecular weight 150 to 400
0) Diglycidyl ether, polypropylene glycol (molecular weight: 180-5000) diglycidyl ether, polytetramethylene glycol (molecular weight: 200-500)
0) Diglycidyl ether, neopentyl glycol diglycidyl ether, alkylene oxide of bisphenol A [ethylene oxide or propylene oxide (1
(Vi) a polyglycidyl ether of a trifunctional to hexafunctional or higher aliphatic alcohol having 6 to 50 or more carbon atoms and a molecular weight of 290 to 1000.
Glycidyl ethers of trihydric to hexahydric or higher polyhydric alcohols of 0, for example, trimethylolpropane triglycidyl ether, glycerol triglycidyl ether, pentaerythritol tetraglycidyl ether;
Sorbitol hexaglycidyl ether, poly (n = 2
To 5) glycerol polyglycidyl ether and the like.

1) Glycidyl ester type: A glycidyl ester of an aromatic mono- or polycarboxylic acid having 6 to 20 or more carbon atoms and having 1 to 6 or more functional groups, and 6 to 20 or more carbon atoms And glycidyl esters of aliphatic or alicyclic mono- or polycarboxylic acids having a monovalent to hexavalent or higher functional group number, such as glycidyl esters of fatty acids. (I) glycidyl esters of phthalic acids include diglycidyl phthalate, diglycidyl isophthalate, diglycidyl terephthalate, and the like; (II) glycidyl esters of aliphatic or alicyclic mono- or polycarboxylic acids include Aromatic nucleated water additive of the phenolic glycidyl ester, dimer acid diglycidyl ester, diglycidyl oxalate, diglycidyl malate, diglycidyl succinate, diglycidyl glutarate, diglycidyl adipate, diglycidyl pimerate, Glycidyl (meth) acrylate (co)
Polymers.

3) Glycidylamine type Glycidylamine of aromatic amines having 6 to 20 or more carbon atoms and having 1 to 10 or more functional groups and glycidylamine of aliphatic amines are exemplified. Glycidylamines of aromatic amines include N,
N-diglycidylaniline, N, N-diglycidyltoluidine, N, N, N ', N'-tetraglycidyldiaminodiphenylmethane, N, N, N', N'-tetraglycidyldiaminodiphenylsulfone, N, N, N ',
N′-tetraglycidyldiethyldiphenylmethane,
N, N, O-triglycidylaminophenol and the like can be mentioned. As the glycidylamine of the aliphatic amine, N,
N, N ', N'-tetraglycidylxylylenediamine and its aromatic nuclei hydrogenated compound, N, N, N', N'-
Tetraglycidylhexamethylenediamine, trisglycidylmelamine and the like can be mentioned.

4) Chain aliphatic epoxides Epoxidized polybutadiene, epoxidized soybean oil and the like. 5) Alicyclic epoxides having 6 to 50 or more carbon atoms and a molecular weight of 90 to 250
0, an alicyclic epoxide having 1 to 4 or more epoxy groups, for example, vinylcyclohexene dioxide, limonene dioxide, dicyclopentadiene dioxide, bis (2,3-epoxycyclopentyl) ether, ethylene glycol bisepoxydioxide Cyclopentyl ether, 3,4 epoxy-6-methylcyclohexylmethyl 3 ', 4'-epoxy-6'-methylcyclohexanecarboxylate, bis (3,4-epoxy-6-methylcyclohexylmethyl) adipate, and bis (3
4-epoxy-6-methylcyclohexylmethyl) butylamine and the like. It also includes a nuclear hydrogenated product of the phenolic epoxy compound. 6) A urethane-modified polyepoxy compound having a urethane bond in the structure; 7) A polyepoxy compound in which NBR, CTBN, silicone rubber, or the like is dispersed in a resin matrix. Other than 1) to 7), any epoxy resin having a glycidyl group capable of reacting with active hydrogen of an amine can be used. Preferred are glycidyl ethers, and particularly preferred are diglycidyl ethers of dihydric phenols and diglycidyl ethers of aliphatic alcohols. In addition, two or more of these polyepoxy compounds can be used in combination.

The injection for repair of the present invention further includes a dehydrating agent, a flexibility-imparting agent, an adhesion-imparting agent, a curing accelerator, a filler, a plasticizer, a coloring inhibitor, a leveling agent, an antioxidant,
Pigments, dispersants, reactive diluents, solvents, water retention agents, wetting agents,
And one or more selected from the group consisting of surfactants and surfactants. The compounding amount is 50% by weight or less, preferably 30% by weight or less, particularly preferably 20% by weight or less based on the total weight. The dehydrating agent is for preventing the water mixed in the repair injection of the present invention for any reason from reacting with the heterocycle and improving the one-pack storage stability.
Examples of the dehydrating agent include a silane coupling agent, a monoisocyanate compound, a carbodiimide compound, and a zeolite. Specifically, vinyl trimethoxysilane,
Trimethyl orthoformate, 2,2-dimethoxypropane,
Synthetic zeolites and the like are mentioned, and vinyltrimethoxysilane and 2,2-dimethoxypropane are preferred. The compounding amount is 20% by weight or less, preferably 10% by weight or less, based on the amount of the injection material for repair.

Further, a catalyst may be added as needed to increase the curing speed. Examples of the catalyst for the hydrolysis reaction of the heterocycle (Z) include a phosphoric ester, p-toluenesulfonic acid, formic acid, acetic acid, propionic acid, dibutyltin dilaurate and the like. 2 generated by hydrolysis of heterocycle
Examples of the catalyst for the reaction between the tertiary amine and the epoxy group include tertiary amines, phenols, and triphenylphosphine. Of these, tertiary amines and phenols are preferred, and N, N-dimethylpropylamine, N, N,
Aliphatic tertiary amines such as N ', N'-tetramethylhexamethylenediamine; N-methylpyrrolidine, N, N'
-Alicyclic tertiary amines such as -dimethylpiperazine; aromatic tertiary amines such as benzyldimethylamine and dimethylaminomethylphenol are particularly preferred.

The adhesiveness-imparting agent is used not only at the time of application under normal conditions, but also to improve the adhesiveness at the time of application under water-containing concrete or high humidity. As the adhesion imparting agent, a silane coupling agent,
Examples thereof include a titanium coupling agent and an aluminum coupling agent, and preferably include a silane compound having a hydrolyzable silyl group. Examples of such a silane compound include vinylalkyl (1 to 4 carbon atoms) alkoxy (1 to 4 carbon atoms) silane [for example, vinyltrimethoxysilane,
Vinyltriethoxysilane, etc.), (meth) acryloyloxyalkyl (C1-4) alkoxy (C1
4) silane [for example, γ-methacryloxypropyltrimethoxysilane and the like], alkyl (1 to 4 carbon atoms) alkoxy (1 to 4 carbon) silane [for example, methyltrimethoxysilane, methyltriethoxysilane and the like], amino (molecule) 1 to 4) alkyl (2 to 15 carbon atoms) alkoxy (1 to 4 carbon atoms) silane [for example, γ- (2-aminoethyl) aminopropyltrimethoxysilane, aminopropyltrimethoxysilane, N-phenylamino Propylmethyldimethoxysilane, etc.), epoxy (1 to 4 per molecule)
Alkyl (C1-4) Alkoxy (C1-4)
4) silane [for example, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, etc.], mercapto (1 to 4 in the molecule) alkyl (1 to 4 carbon atoms) alkoxy (1 to 4 carbon atoms) To 4) silanes [for example, γ-mercaptopropyltrimethoxysilane and the like] and the like. Of these, preferred are vinylalkylalkoxysilane, (meth) acryloyloxyalkylalkoxysilane, and epoxyalkylalkoxysilane, and particularly preferred are vinyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-glycidoxy. Propyltrimethoxysilane. The amount of these silane compounds to be used is 0.1 to 50 parts by weight, preferably 1 to 10 parts by weight, based on the epoxy resin. When the amount is 0.1 part by weight or more, adhesion (particularly, adhesion on a wet surface) is improved, and when the amount is 50 parts by weight or less, it reacts with moisture during use and does not hinder ring opening of the heterocyclic group.
These silane compounds may be used in combination of two or more.

The filler is usually a finely pulverized solid, and the main purposes of the compounding are represented by functions such as strength, elastic modulus, etc., durability such as weather resistance, conductivity, and thermal conductivity. This is an improvement in physical properties, an improvement in molding processability such as fluidity and shrinkage, or an improvement in economic aspects such as an increase in amount and resource saving. Examples of the filler include calcium carbonate, carbon black, clay, talc, titanium oxide, quicklime, kaolin, zeolite, diatomaceous earth, vinyl chloride paste resin, vinylidene chloride resin balloon, and the like, and used alone or in combination. be able to. As the reactive diluent, a polyfunctional acrylate can be used in addition to a normal low-molecular epoxy compound.

Further, a polyalkylene ether having a hydrolyzable silyl group at a molecular chain terminal, which is called a modified silicone resin, may be added as a flexibility-imparting agent. More specifically, poly (methyldimethoxysilyl ether) and the like are exemplified, and commercially available ones can be used. Polyalkylene (C2-6) ether (weight average molecular weight; 30)
0 to 10000) or those obtained by linking 2 to 5 of them (for example, linked by a methylene group) to the terminal of which a 1 to 3 functional (preferably 2 functional) hydrolyzable silyl group is bonded. As the hydrolyzable silyl group, the following general formula (1)
7).

[0041]

Embedded image

(Where D is -O-, -S-, -NHCO
—, —OCO—, —NH—, —ON <, and R ⁷ , R ⁸
Represents hydrogen, halogen, an alkyl group having 1 to 10 carbon atoms, an aryl group, or an arylalkyl group, and n represents 0 or 1 to 3
Represents an integer. Specific examples include a halogenosilyl group, an acyloxysilyl group, an amidosilyl group, an aminoxysilyl group, an alkenyloxysilyl group, an aminosilyl group, an oximesilyl group, an alkoxysilyl group, and a thioalkoxysilyl group.
Preferred are alkoxysilyl groups. The weight average molecular weight of the modified silicone resin is 400 to 600,000.
It is. These polyalkylene ethers may be used alone or in a combination of two or more. The amount of modified silicone resin used is epoxy resin 1
10 to 500 parts by weight, preferably 5 to 100 parts by weight
0 to 200 parts by weight. When the amount is less than 500 parts by weight, the adhesiveness does not deteriorate, and when the amount is more than 10 parts by weight, the flexibility of the cured epoxy resin is good.

Such a modified silicone resin is cured by moisture in the air in the presence of a catalyst for the modified silicone resin when the repairing filler is used. Examples of the catalyst for the modified silicone resin include tin compounds such as dibutyltin oxide, metal salts of carboxylic acids such as lead octylate, and dibutylamine.
Examples thereof include amine salts such as 2-ethylhexoate, and the amount used is 0.1 to 10 parts by weight based on 100 parts by weight of the modified silicone resin. These additives need to be sufficiently dehydrated before addition.

In order to improve the storage stability of the repair injection of the present invention, together with the epoxy resin curing agent, the polyepoxy compound has no active hydrogen or has no active hydrogen. In this case, those having an active hydrogen equivalent of 4,000 or more are preferred. The active hydrogen equivalent of the repair injection of the present invention is usually 2,000 or more, preferably 20,000 or more, and more preferably 40,000 or more. If the active hydrogen equivalent is less than 2,000, the storage stability of the repair injection will be insufficient. If it has active hydrogen, deactivate the group having active hydrogen to a group that does not react with the epoxy resin to make it have no active hydrogen, or make the active hydrogen equivalent within a required range. It can be. The inactivation of the active hydrogen group can be performed by monoisocyanate compounds (ethyl isocyanate, n-butyl isocyanate, phenyl isocyanate, etc.), acid anhydrides (acetic anhydride, succinic anhydride), acid halides (benzoyl chloride, etc.) or alkyl halides (Methyl chloride, methyl bromide, ethyl chloride, etc.). The storage stability of the repair injection of the present invention is particularly excellent, and it is also suitable as a one-pack repair injection.

The actual curing reaction using the repair injection of the present invention starts with the reaction between the moisture in the air and the heterocyclic compound. That is, since the curing reaction proceeds only from the surface in contact with air, when the ratio of the contact area with air to the volume is small, such as when the injectant is in a container, the curing speed is extremely slow. Become. Conversely, when the ratio of the surface area to the volume is increased by pouring or thinly coating concrete, the curing speed is greatly increased to a practical level. Therefore, when the injection is in the container, the pot life is several tens to several hundred times longer than that of the conventional two-liquid type, and the unused injection is repeatedly used. It is possible to do
Quantitative constraints are greatly reduced. The curing temperature of the repair injection of the present invention is usually 5 ° C. or higher, preferably 10 to 10 ° C.
The temperature is 0 ° C, particularly preferably 15 to 40 ° C. The humidity conditions are preferably 20-100% R.F. H. And particularly preferably 30 to 80% R.I. H. It is. The curing time is a few minutes to 100 hours.

The repairing and pouring method of the concrete structure using the repairing and pouring agent of the present invention can be carried out according to a conventional method. Concrete structures include, for example, houses, buildings, bridges, dams, tunnels, and the like. The repair injection of the present invention is used to repair such defects such as cracks and floating of reinforced concrete and mortar. For example, cracks in concrete, mortar, etc. can be cleaned with a brush or the like, an injection opening for an injection agent can be provided, and a commercially available automatic or manual repair material injection cartridge can be easily injected into the opening. The cartridge for repair material injecting agent of the present invention is not particularly limited as long as it has a nozzle for repair material injecting at one end and has a press-fitting portion such as a gun mounting portion at the other end. It is necessary that the nozzle part can be removed and replaced, and the length of the nozzle part is 0.5 to 20 c
m, particularly preferably 0.5 to 10 cm. When it is 0.5 cm or more, there is almost no influence on unused injecting agent due to mixing of water, and 20 cm
In the following cases, the workability of mounting and removing the cartridge is good. In addition, when replenishing an appropriate amount of the one-pack type epoxy resin-based injecting agent, it is preferable to perform the treatment under an inert gas atmosphere in order to avoid mixing of moisture. There is no problem in performance even if replenishment is performed.

[0047]

The present invention will be further described with reference to the following examples.
The present invention is not limited to this. In addition, a part shows a mass part below. 1) Production of Heterocycle-Containing Compound In a reaction vessel equipped with a stirrer, a heating device, a cooling pipe and a reflux pipe equipped with a water separator, 1,000 parts of methyl methacrylate, 200 parts of monoethanolamine, and 2.4 parts of hydroquinone were charged. After reacting at 20 ° C. for 40 hours while passing air through the liquid, 3.6 parts of hydroquinone was added, and excess methyl methacrylate was removed at 20 ° C. under reduced pressure. Next, 390 parts of acetone and 9.2 parts of paratoluenesulfonic acid were placed in a container,
Charged 400 parts of synthetic zeolite, sealed after nitrogen replacement,
A dehydration reaction was performed at room temperature for 10 hours while stirring. After the completion of the reaction, an acid adsorbent (KW-1000, manufactured by Kyowa Chemical Industry Co., Ltd.)
20 parts were charged and stirred at 20 ° C. for 3 hours. After cooling, diatomaceous earth A (manufactured by Showa Chemical Industry Co., Ltd .; Celite # 600) 10
The mixture was filtered as a filter aid, and acetone remaining in the filtrate was distilled off by heating to obtain an intermediate. The intermediate had a number average molecular weight of 201 and a viscosity (25 ° C .; B-type viscometer) of 320 cP. In a similar reactor, 500 parts of intermediate M-1 and propylene oxide 6 mol adduct of sorbitol 310
And 24 parts of sodium methylate, and the mixture was purged with nitrogen, heated to 100 ° C., and transesterified. After neutralization, an acid adsorbent (KW-100 manufactured by Kyowa Chemical Industry Co., Ltd.)
0) 20 parts were charged and further stirred for 1 hour. Next, 10 parts of diatomaceous earth A was filtered at 70 ° C. as a filter aid to obtain heterocycle-containing compound A. HC-1 has a number average molecular weight of 1
725, molecular weight 297 per one heterocyclic group, viscosity (2
5 ° C .; B-type viscometer) It was a tan liquid of 40,000 cP.

2) Production of one-pack type epoxy resin injection agent Bisphenol F type epoxy resin (manufactured by Yuka Shell Epoxy Co .; trade name: Epicoat 828) and a heterocycle were previously dehydrated at 80 ° C. and 20 mmHg at the ratios shown in Table 1. Compound A
Are stirred under reduced pressure, and then vinyltrimethoxysilane (manufactured by Dow Corning Toray Silicone Co., Ltd.) as a dehydrating agent, γ-glycoxypropyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd.) as an adhesion promoter, and silyl as a modified silicone resin. SAT-030 (manufactured by Kanegafuchi Chemical Co., Ltd.), dioctyl phthalate solution of dibutyltin oxide as a catalyst for a modified silicone resin, and calcium carbonate as a filler were added, followed by stirring under reduced pressure again to produce a one-pack type epoxy resin-based filler. did. The viscosity of the injectant is 20 ° C. and nitrogen atmosphere.
It was measured with an H-type rotary viscometer. The touch drying time is about 0.1 mm with a one-part epoxy resin
After applying at 20 ° C, cured at 65% humidity,
It is indicated by the time at which the surface of the coating film hardens. The storage stability was determined by visually observing the state of the injecting agent when the injecting agent having the composition shown in Table 1 was placed in an airtight container purged with nitrogen and allowed to stand at 50 ° C. in an atmosphere for 3 months. Those that maintain fluidity are ○,
The gelled product was evaluated as x. Adhesion is JISA602
According to 4 above, the above-mentioned injection was applied to one side of each of two 40 × 40 × 80 mm mortar specimens, and the mixture was heated at 20 ° C. and 65%
3 at humidity (standard time) and 85% humidity (wet)
After standing for two hours, the two were laminated at a thickness of 1 mm and cured under the same conditions for 7 days, and then the adhesive strength was measured.

3) When the injection obtained in 2) was directly injected without a primer, good results were obtained as shown in Table 1. The following test was conducted to examine the reusability by the method using the repairing filler of the present invention. A commercially available cartridge was charged with the repair injection having the composition shown in Table 1, and this was attached to a concrete plate and kept at 20 ° C and 6 ° C.
2 at 5% humidity (standard time) and 85% humidity (wet)
Cured for 4 hours. Next, the injection agent in the cartridge was taken out, and the viscosity, touch dry time, and adhesive strength were measured in the same manner as described above. Table 1 shows the results.

(Comparative Examples 1 to 3) As in Examples 1 to 3,
A repair injection was prepared using Ketimine H (product name: Epicure H-3, manufactured by Yuka Shell Epoxy Co., Ltd.) according to the formulation shown in Table 1, and the same test was conducted. The results are shown in Table 1.

[0051]

[Table 1]

From Examples 1 to 3 and Comparative Examples 1 to 3, the repair injection using a heterocyclic compound has excellent storage stability as compared with the case using ketimine. It can be seen that the touch drying time and the adhesive strength hardly decrease.

[0053]

Therefore, the repair injection of the present invention has the following effects. (1) The curing speed after injection is high. (2) Excellent storage stability. Therefore, it is very useful as a repair injection. It is also suitable as a one-pack repair injection. Therefore, an unused repair injection can be repeatedly used two or more times, and the waste can be greatly reduced. In addition, when using a one-part type, the disadvantages of the two-part type, such as a quantitative error when mixing the main agent and the curing agent, poor mixing, poor adhesion due to excess pot life, and a change in pot life due to temperature changes in the workplace. Deterioration of injectability due to variation can be eliminated.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E176 AA01 BB14 4H017 AA04 AB08 AB13 AB15 AB17 AC01 AC05 AD05 AD06 AE03 4J036 AB01 AB02 AB03 AB10 AC01 AC02 AC03 AC05 AD08 AD09 AF06 AF07 AG04 AG06 AG07 AH01 AH02 AH05 AH03 AJ09 AK03 FB02 FB03 FB06 FB08 FB11 FB12 FB13 FB16 JA06 JA13

Claims (11)

[Claims] An injectable agent for repairing a concrete structure, comprising a heterocyclic group-containing compound (A) having two or more heterocyclic groups (Z) represented by the following general formula (1) and a polyepoxy compound. . Embedded image (Wherein, R represents a linear or branched alkylene group having 2 to 10 carbon atoms which may contain -O- and / or -S-, R
¹ and R ² may be the same or different, and may be a hydrogen atom, a linear or branched C 1-6
An alkyl or alkenyl group of the formula
Represents an aryl group having 8 to 8 carbon atoms, or represents a cycloalkyl ring having 5 to 7 carbon atoms together with the carbon atom to which R ¹ and R ² are bonded. R ³ represents an alkylene group having 1 to 10 carbon atoms. ) 2. (A) has at least one main chain selected from the group consisting of hydrocarbons which may have a hydroxyl group in a side chain, polyether, polyvinyl, polyester, polyamide, polycarbonate and novolak. The repair injection according to claim 1. 3. The method according to claim 1, wherein (A) is a compound represented by the following general formula (2) to
The repair injection according to claim 1 or 2, which is a compound having a main chain structure represented by at least one selected from the group consisting of: Embedded image 4. The method according to claim 1, wherein (A) is a compound represented by the above general formula (2) or (3).
The repair injection according to claim 3, which is a compound having a main chain structure represented by at least one selected from the group consisting of (4) and (4). 5. The repair injection according to claim 3, wherein (A) is a compound having a main chain structure represented by the above general formula (2). 6. The repair injection according to claim 1, wherein (A) is a compound represented by the following general formula (11). Embedded image [In the formula, A ¹⁰ is a residue obtained by removing a hydroxyl group from k-valent polyhydric alcohols and k-valent polyhydric phenols.
A ^o is a linear or branched alkylene group having 2 to 4 carbon atoms, p and q are 0 or an integer of 1 to 10, and may be the same or different. r is 0 or 1
It is. Z ¹ represents OH or Z. Q ³ is a hydrogen atom or a glycidyl group. m is 1 or an integer of 2 to 10, k is 2
Is an integer of 10 to 10 and k ≧ m. m + r ≧ 2. When m = 1, Z ¹ is Z. p, q, r, A ^o , Z ¹
And when there are a plurality of Q ^{3 s} , they may be the same or different. ] 7. In the repair injection, the heterocyclic group (Z) is added to 1 equivalent of an epoxy group of the polyepoxy compound.
The amount of active hydrogen generated by decomposition of water
The repair injection according to any one of claims 1 to 6, comprising a heterocyclic-containing compound in an amount equivalent to 2.0 equivalents. 8. The repair injection composition further comprises a dehydrating agent, a flexibility-imparting agent, an adhesion-imparting agent, a filler, a curing accelerating catalyst, a plasticizer, a coloring inhibitor, a leveling agent, an antioxidant, a pigment,
The repair injection according to any one of claims 1 to 7, further comprising at least one additive selected from the group consisting of a dispersant, a reactive diluent, a solvent, a water retention agent, a wetting agent, and a surfactant. . 9. The repair injection according to claim 8, wherein the additive is a flexibility imparting agent and / or an adhesion imparting agent. 10. The repair injection according to claim 1, wherein the flexibility-imparting agent is a modified silicone resin, and the adhesion-imparting agent is a silane coupling agent. 11. A method for repairing and injecting a concrete structure, comprising using the repairing injectant according to claim 1.