JPS63156879A - Impregnating-coating composition - Google Patents

Abstract

PURPOSE:To provide the titled composition outstanding in infiltrativity and curability, small in postcure shrinkage, suitable for the crack repair for structures, comprising an active hydrogen component with an amine equivalent falling within a specific range consisting mainly of aromatic polyamine and NCO component containing non-aromatic polyisocyanate. CONSTITUTION:The objective composition can be obtained by combining two organic solvent solutions of (A) an active hydrogen-contg. component with an amine equivalent <=500 consisting mainly of aromatic polyamine (e.g., 1- methyl-3,5-diethyl-2,4-diaminobenzene) and (B) an organic polyisocyanate component containing pref. 10-60wt% of a non-aromatic polyisocyanate (e.g., hexamethylene diisocyanate), respectively, so as to be 100cps for the viscosity when mixed and <30min for the gelling time. The equivalent ratio of the NCO group (in the component B) to the active hydrogen group (in the component A) is pref. 0.9-1.2, whereas the content of said organic solvent is pref. such as to be 10-40wt% of the total weight of the components A and B.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to impregnating and coating compositions, particularly impregnating and/or coating compositions for interstitial structures.

[Prior Art] Conventionally, a method is known in which a chemical solution (-corrugated) made of polyisocyanate or urethane prepolymer is introduced into the gap in a structure such as concrete and hardened by moisture (Tokuko Sho et al. 49-31029゜Special Publication 1986-37
Publication No. 270). It is also known that a chemical solution (two-component type) consisting of a urethane prepolymer and a curing agent (polyol) can be used in coating film waterproofing construction methods, waterproof water-blocking wall construction methods, shield construction methods, etc. (Japanese Patent Publication No. 52-39788. Kosho 50-2
5261, Japanese Patent Publication No. 47-23447).

[Problems to be Solved by the Invention] The curing speed of the gap filling using polyisocyanate or urethane prepolymer varies depending on the construction conditions (temperature during construction, amount of water present in each gap, etc.).

There are drawbacks such as the strength of the cured product is significantly affected and reproducibility is poor. In addition, when using a two-component urethane consisting of a urethane prepolymer and a curing agent to fill gaps, it is difficult to penetrate deep into the gap as it is, so it is necessary to drill a 7-shaped groove or a U-shaped groove in advance. It requires a complicated process, and if it is diluted with a solvent to lower its viscosity, it will shrink significantly after hardening and drying, causing cracks.

"Means for Solving the Problems" The present inventors have conducted intensive studies to find an impregnating/coating composition for the gaps in structures that can be easily applied, cures in a short time, and does not cause large shrinkage after curing, and as a result, the present invention has been developed. reached.

That is, the present invention: [A] An aromatic polyamine (a
) and an active hydrogen atom-containing component consisting of an organic solvent solution of [
B1 non-aromatic polyisocyanate or organic polyisocyanate consisting of this and other polyisocyanates (b
) with an isocyanate component consisting of an organic solvent solution, and the viscosity of the mixture of [A] and [B] is 100
This is an impregnating/coating composition for interstices in structures, which is characterized by having a gelation time of less than CpS and less than 30 minutes.

In the present invention, the aromatic polyamine used as an essential component in the active hydrogen atom-containing component [1] includes those represented by the following general formulas (1) to (4).

In the formula, R is H, an alkyl group (e.g. methyl, ethyl,
01-C4 alkyl groups such as n- and i-propyl, butyl) or/and electron-withdrawing groups (e.g. Cu2.
Halogens such as Br, I, and F; alkoxy groups such as methoxy and ethoxy; nitro groups, etc.); n is 1 to 3;
Divalent groups such as C1-C4 alkylene groups such as 2-, CH3I C- CH3), thio groups, polythio groups, seleno groups, polyseleno groups, telluro groups, and polytelluro groups: m is O or a positive number (e.g. Average 0
．． 1 to 1 or more>; Y represents a trivalent aliphatic hydrocarbon group (for example,>CH); A plurality of R's may be the same or different.

Specific examples of such polyamines include the following.

(1) Aromatic polyamine having a nuclear-substituted alkyl group: 1
．． 3-dimethyl-2,4-diaminobenzene, 1,3-
Diethyl-2,4-diaminobenzene, 1,3-dimethyl-2,6-diaminobenzene, 1,4-diethyl-2
, 5-diaminebenzene, 1,4-diisopropyl-2
, 5-diaminobenzene, 1,4-dibutyl-2,5-
Diaminobenzene, 2,4-diaminomesitylene, 1
, 3,5-triethyl-2,4-diaminobenzene,
1,3.5-triisopropyl-2,4-diaminobenzene, 1-methyl-3,5-diethyl-2,4-diaminobenzene.

1-methyl-3,5-diethyl-2,6-diaminobenzene (and mixtures of these isomers in various proportions),
and analogs; 2,3-dimethyl-1,4-diaminonaphthalene, 2,6-dimethyl-1,5-diaminonaphthalene, 2,6-diisopropyl-1,5-diaminonaphthalene, 2,6-cyptyl-1,5 -diaminonaphthalene and analogs; 3,3°, 5,5-tetramethyl-benzidine, 3,3', 5,5"-tetraisopropyl-benzidine, and analogs: 3,3°, 5,5'- Tetramethyl-4,4°-diaminodiphenylmethane.

3.3°,5,5°-tetraethyl-4,4°-diaminodiphenylmethane l 3+3'+515-tetraisopropyl-4,4-diaminodiphenylmethane, 3,3
°, 5,5'-tetrabutyl-4,4°-diaminodiphenylmethane.

3.5-diethyl-3-methyl-2°, 4-diaminodiphenylmethane, 3.5-diisopropyl-3°-methyl-2', 4-diaminodiphenylmethane, 3.3
'-Diethyl-2,2-diamino-diphenylmethane.

4.4"-diamino-3,3°-dimethyl-diphenylmethane, and similar, 3.3',5.5'-tetraethyl-4,4'-diaminobenzophenone, 3,3°
, 5,5°-tetraisopropyl-4,4′-diaminobenzophenone, 3,3°,5.5′-tetraethyl-
4,4"-diaminodiphenyl ether, 3.3',
5,5°-tetraisopropyl-4,4-diaminodiphenylsulfone, and the like.

(!1) Unsubstituted aromatic polyamine: 2,4- and 2,6-diamittoluene, i,2-,
1,3- and 1,4-phenylenediamine; naphthylene-1,5-diamine; 2,4''- and 4,4''-diaminodiphenylmethane, polyphenylpolymethylene polyamine [aniline-formaldehyde condensate.

In formula (3), 2m is 0.1 to 0.7. X is a methylene group, R
is H]; and triphenylmethane-4゜4',
4°°-triamine, etc.

(iii) Aromatic polyamines having nuclear-substituted electron-withdrawing groups: 2-chloro-1,4-phenylenediamine, 3-amino-4-chloroaniline, 4-bromo-1,3-phenylenediamine, 2,5-dichloro -1,4-phenylenediamine, 5-nitro-1,3-phenylenediamine.

3-dimethoxy-4-aminoaniline; 4,4°-diamino-3,3′-dimethyl-5,5″-dibromo-diphenylmethane, 4,4°-methylenebis(0-chloroaniline [commonly known as HOCA]), 3, 3°-Dichlorobenzidine.

3.3'-dimethoxybenzidine, bis(4-amino-
3-chlorophenyl)oxide, bis(4-amino-2
-chlorophenyl)propane, bis(4-amino-2-
chlorophenyl) sulfone, bis(4-amino-3-methoxyphenyl)decane, bis(4-aminophenyl)
Sulfide, bis(4-aminophenyl)telluride, bis(4-aminophenyl)selenide, bis(4-amino-3-methoxyphenyl)disulfide, 4,4°-methylenebis(2-iodoaniline), 4,4° -methylenebis(2-bromoaniline), 4,4°-methylenebis(2-fluoroaniline), 4-aminophenyl-2
-Chloroaniline, etc.

In addition, an aromatic polyamine having a secondary amine group [a part or all of -NH2 in the above aromatic polyamine is -NH-
R' (where R' is an alkyl group, for example, a lower alkyl group such as methyl or ethyl)] For example, 4,
4°-di(methylamine)-diphenylmethane, 1-
Methyl-2-methyl-amino-4-aminebenzene can be used.

These aromatic polyamines can be used alone or in combination of two or more.

Among these aromatic polyamines, l)
, (li+), for these Ii, and for these [(
1) and/or (iii)] in combination with (11) (
The weight ratio is, for example, 100:O to 20:80, preferably 100:O to 50:50.

Among (1), preferred are at least one alkyl substituent ortho to the first amine group and two alkyl substituents having 1 to 3 carbon atoms ortho to the second amine group. a liquid or dissolved aromatic diamine containing an alkyl substituent, for example 1,3-diethyl-2,4-
Diaminobenzene, 2,4-diaminomesitylene, 1-
Methyl-3,5-diethyl-2゜4-diaminobenzene, 1-methyl-3,5-diethyl-2,6-diaminobenzene, 1,3.5-triethyl-2,6-diaminobenzene, 3,5 ,3°,5-tetraethyl-4°4
“-diaminodiphenylmethane, 3,5,3°,5°
-tetraisopropyl-4,4'-diaminodiphenylmethane.

Most preferred are: ■ 1-methyl-3,5-diethyl-2,4-diamino isomers and 1-methyl-3,5-diethyl-2,6-diaminobenzene (diethyltoluenediamine) and their use in various proportions; In a mixture, in particular about 80% by weight of the 2,4-diamino isomer and 20%
A mixture containing the 2,6-isomer of and about 65% by weight of 2
, 4-isomer and a mixture containing about 35% of the 2,6-isomer, and ■ 3,3°, 5,5°-tetrinepropyl-
4,4'-diaminodiphenylmethane.

Among (11), preferred are 2,4- and/or 2,6-diamino-1-toluene, 4,4°-diamino-
diphenylmethane and 1,3- or 1,4-phenylenediamine.

(Example) is preferably 2-chloro-1,4-
It is phenylenediamine.

In addition to the aromatic polyamine (a), other polyamines can be used in combination with the active hydrogen atom-containing component [A], if necessary. Other polyamines include polyamide polyamines [for example, polycarboxylic acids (dicarboxylic acids such as dimer acid) and excess (2 moles or more per 1 mole of acid) polyamines [the above aromatic polyamines; alkylene diamines (ethylene diamine, hexamethylene diamine, ,
aliphatic polyamines such as trimethylhexamethylene diamine, etc.), polyalkylene polyamines (diethylene triamine, triethylene tetramine, etc.); alicyclic polyamines such as cyclohexylene diamine, dicyclohexylmethane diamine, isophorone diamine; piperazine, N-aminoethyl Examples include low molecular weight polyamide polyamines obtained by condensation with heterocyclic polyamines such as piperazine;

The ratio (weight ratio) of aromatic polyamine (a) to other active hydrogen atom-containing compounds is usually 100:O to 50:50, preferably 100:O to 70:30, particularly preferably 1
00:0 to 90:10. If the amount of aromatic polyamine is less than the above range, the reaction will be too fast and it will gel instantly, making it impossible to mix two components, or the viscosity of the polyamine will be high, making it difficult to dilute (keep the viscosity below 100 CF). The amount of solvent required is excessive, and as a result, the cured material to be boned shrinks significantly, which is undesirable.

Equivalent of the entire active hydrogen atom-containing compound [aromatic polyamine (a) and other polyamines as necessary] in [A] (
The molecular weight per amino group is usually 500 or less, preferably 90 to 200. If the amino group equivalent exceeds 500, the cured product will shrink significantly, which is not preferable.

The organic solvent to be included in the active hydrogen atom-containing component [A] includes inert solvents that do not have active hydrogen atoms, such as: aromatic hydrocarbon solvents such as toluene, xylene, and sorbetine: n-hexane, mineral spirits, and cyclohexane. Aliphatic or cycloaliphatic hydrocarbon solvents such as methylene dichloride.

Chlorinated solvents such as trichloroethylene and perchlorethylene; Ester or ester ether solvents such as ethyl acetate, butyl acetate, methoxybutyl acetate, and methyl cellosolve acetate; Ether solvents such as tetrahydrofuran and dioxane: Methyl ethyl ketone,
Examples include ketone solvents such as methyl isobutyl ketone; and mixed solvents of two or more of these solvents. Among these, preferred are chlorinated solvents, particularly trichlorethylene and perchlorethylene.

In the present invention, the content of the line-specific solvent in the active hydrogen atom-containing component [A] is usually 50% by weight or less, preferably 10 to 10% by weight.
It is 40% by weight. If the amount of the organic solvent exceeds 50% by weight, the cured product will shrink significantly and the strength of the cured product will decrease, which is not preferable.

Aromatic polyamine (a) in active hydrogen atom-containing component [A]
) content is usually 20 to 90% by weight, preferably 30 to 9% by weight.
It is 0% by weight. 20% by weight of aromatic polyamine (a)
If it is less than this, problems such as slow curing and increased shrinkage of the cured product occur, which is not preferable.

The content of other polyamines in [A] is usually O to 20% by weight.
, preferably 0 to 10% by weight. The content of polyamine [aromatic polyamine (a) and other polyamines as necessary] in [A] is usually 20 to 90% by weight.

Preferably it is 30 to 90% by weight.

The viscosity (25°C) of the active hydrogen atom-containing component [A] is usually 10 to 100 cpS, preferably 10 to 50 cpS.
It is S.

In the present invention, as the non-aromatic polyisocyanate used as at least a part of the organic polyisocyanate (b) in the isocyanate component [B], for example,
Aliphatic polyisocyanate having 2 to 18 carbon atoms (excluding carbon in the NCO group) [e.g. hexamethylene diisocyanate, lysine diisocyanate, etc.], 4 to 1 carbon number
5 alicyclic polyisocyanates [e.g. dicyclohexylmethane diisocyanate (hydrogenated MDI), isophorone diisocyanate, etc.], aromatic aliphatic polyisocyanates having 8 to 15 carbon atoms [non-aromatic polyisocyanates such as xylylene diisocyanate, etc.] Non-yellowing type) polyisocyanates; modified polyisocyanates derived from these non-aromatic polyisocyanates [urethane group, carbodiimide group, allophanate group, urea group, biuret group, uretdione group, uretimino group, isocyanurate group .

Polyisocyanate modified to contain oxazolidone groups
98゜Special Publication No. 54-33'597, JP-A-59-
199160, etc.), water-crosslinked polyisocyanates such as Sumidur N-75 (manufactured by Sumitomo Bayer Urethane), Duranate 24A-100 (manufactured by Fukaisei), Duranate D-201 (manufactured by Fukaisei) Polyol-crosslinked NCO-terminated urethane prepolymers of up to 200 molecules]: and mixtures of two or more thereof. Preferred among these are aliphatic and cycloaliphatic polyisocyanates, and poly-16=ol crosslinked NCO-terminated urethane prepolymers derived therefrom.

In addition to the non-aromatic polyisocyanate, other polyisocyanates that may be used as necessary include those having 6 to 2 carbon atoms.
0 aromatic polyisocyanates, such as 2,4- and/or 2,6-tolylene diisocyanate (TD
I), 4,4"- and/or 2,4°-diphenylmethane diisocyanate (MDT).

naphthylene diisocyanate, etc.; crude products of these aromatic polyisocyanates, such as crude MDI, crude T
DI: Modified polyisocyanate derived from these aromatic polyisocyanates [urethane group, carbodiimide group, allophanate group, urea group, biuret group,
Uretdione group, uretimino group, isocyanurate 1~
to polyisocyanate 1 modified to contain oxazolidone groups (Japanese Patent Publication No. 39-8968.
27098. Japanese Patent Publication No. 54-33597, Japanese Patent Application Publication No. 1973
9-199160), for example, Isonate 143 [(manufactured by Kasei Upjohn), Millionone-1~MTL (manufactured by Hodogaya Chemical), Sumidur PF
, modified MD1 such as CD (manufactured by Sumitomo Bayer Urethane)
．． Polyol-crosslinked NCO-terminated urethane prepolymers derived therefrom]; and mixtures of two or more thereof. Among other polyisocyanates, preferred is crude IJ MDI.
Obtained by phosgenation of crude diaminodiphenylmethane [a mixture of diaminodiphenylmethane, a condensation product of formaldehyde and an aromatic amine or a mixture thereof, and a small amount (for example, 5 to 20% by weight) of a trifunctional or higher functional polyamine], and the following general A mixture of polyisocyanates having about 2 to 5 NCO groups represented by formula (5); specific examples include Millionate IR-100, MR-200
, I・1R-300 (manufactured by Nippon Polyurethane Industries),
MDI-CR (manufactured by Sankata Nichiwa Urethane).

PAPI, PAPI-135, PAPI-901, Isonate-580 (manufactured by Kasei Upjohn), and Sumidur 44V-10, 44V-20 (manufactured by Sumitomo Bayer Urethane).

[In the formula, Ar represents a benzene ring, and n is 0,1,2°3. ..., and the average value of n is usually larger than O and smaller than 3. ] NCO of polyisocyanate (b) [non-aromatic polyinsyanate and other polyinsyanates as necessary]
The content is usually 5-40%, preferably 10-35%.

As the organic solvent used in isocyanate component [B1, those listed above as the organic solvent in [Al] can be used. Among these, aromatic hydrocarbon solvents (especially xylene, Tsurupez) and chlorine solvents (especially trichloroethylene) are preferred.

perchlorethylene). The organic solvent used in [B] may be the same as or different from that used in [Al.

In the present invention, the content of the organic solvent in the incyanate component [B] is usually 50% by weight or less, preferably 10 to 4% by weight.
It is 0% by weight. If the amount of organic solvent exceeds 50% by weight, the cured product will shrink and its strength will decrease.

Undesirable.

Isocyanate component [The content of non-aromatic polyisocyanate in B1 is usually 1 to 70% by weight, preferably 10 to 6% by weight.
It is 0% by weight. If the non-aromatic polyamine content is less than 1% by weight, the open time (the time period during which the topcoat material can be applied) becomes short, which is not preferable.

The content of other polyisocyanates in [B] is usually 0 to 6
0% by weight, preferably 0 to 50% by weight.

[The content of polyisocyanate (b) [non-aromatic polyisocyanate and other polyisocyanates as necessary] in Bl is usually 20 to 70% by weight, preferably 30 to 8% by weight.
It is 0% by weight.

The viscosity (25°C) of the isocyanate component [B1 is usually 10 to ioo cpS, preferably 10 to 50 cp
It is S.

In the present invention, active hydrogen atom-containing components [Al and/or
Or is there something in the isocyanate component [B] to promote the reaction between the two? A catalyst may be included if necessary. Such catalysts include metal catalysts such as tin-based catalysts [trimethyltin laurate, trimethyltin hydroxide, dimethyltin dilaurate, dibutyltin dilaurate.

[Stannas octate, etc.], lead-based catalysts [lead oleate, lead 2-ethylhexanoate, lead naphthenate, etc.], other metal catalysts [metal naphthenate salts, such as cobalt naphthenate]: and amine catalysts. For example, triethylenediamine, tetramethylethylenediamine, tetramethylhexylenediamine, diazabicycloalkenes [D
BU C Sanab'(K""141, 8-diaza-bicyclo[5,4,Ol undecene-7], etc.) Nidialkylaminoalkylamines [dimethylaminoethylamine, dimethylaminepropylamine, diethylaminepropylamine, dibutylaminoethylamine , dimethylaminooctylamine, dipropylaminopropylamine, etc.] or heterocyclic aminoalkylamines [2-(1-aziridinyl)ethylamine, 4-(1-
carbonates and organic acid salts (formates, etc.) of piperidinyl)-2-hexylamine, etc.; N-methylmorpholine, N-ethylmorpholine, triethylamine, diethylethanolamine, dimethylethanolamine, etc.; and two or more of these Examples include combination systems.

These catalysts are generally preferably added to [81], but metal catalysts may be added to [B]. The amount of catalyst added can be varied within the range that gelation occurs within 30 minutes after mixing [Al and [B1]. Generally based on the amount of [Al and [B] polymerized phase, usually 1% or less, preferably 0.01 to 0
．． It is 5%.

In the present invention, active hydrogen atom-containing components [Al and/or
Alternatively, various additives such as a plasticizer, an antioxidant, a stabilizer such as an ultraviolet absorber, a fungicide, a coloring agent (dye, pigment), etc. can be blended into the isocyanate component [Bl], if necessary.

Examples of plasticizers include ester plasticizers [dibutyl phthalate, dioctyl phthalate, dioctyl adipate, polyethylene glycol (molecular weight = 200 > diadibate, etc.); tar-based plasticizers [tar, asphalt, etc.]
Petroleum resin plasticizers [Fukol [manufactured by Fuji Kosan ■], soft resin [manufactured by Tokyo Jushi Kogyo II], Shintalon (manufactured by Tokyo Jushi Kogyo ■), etc.] are included. These are preferably blended into [A]. The amount of plasticizer blended is usually 50% or less, preferably 0 to 30%, based on the weight of [A].
It is. The total amount of plasticizer and organic solvent is usually 10 to 60%, preferably 10 to 50%, based on the weight of [A].
It is.

Examples of antioxidants include hindered phenol antioxidants [Irganox 1010 (manufactured by Ciba Geigy), etc.], hindered amine antioxidants [Zanol LS, etc.]
7.70 (manufactured by Ciba Geigy)]; as a UV absorber, a triazole UV absorber [Tinuvin 32
0 (manufactured by Ciba Geigy), etc.].

Benzophenone UV absorber [Ciasorb UV 9
(manufactured by Cyanamid)].

These are preferably blended into [A]. The blending amount of these stabilizers is usually 2% or less, preferably 0.1 to 1%, based on the weight of [A].

9 The colorant may be added to either [A] and/or [B]. Mix different dyes to [A] and [B] to make them different colors (for example, make [A] yellow and [B]
] by coloring Aomura), the two can be distinguished by color,
The uniform miscibility of the two liquids can be visually determined based on the color of the two liquids (green in the above example). In this case, the amount of dye added is as follows for each of [A] and [B]:
It is usually 0.1% by weight or less.

In the present invention, active hydrogen atom-containing component [A].

The specific gravity of the isocyanate component [B] and the mixture thereof is preferably greater than 1. By using a material with a specific gravity greater than 1, even if water or the like exists in the gaps of the structure to which it is applied, it can penetrate underneath and firmly adhere to the structure.

In the composition of the present invention, the inocyanate component [B] and the active hydrogen atom-containing component [A] are the former isocyanate 1
The ratio of ~ group to the latter active hydrogen atom-containing group (amine group, etc.) is usually O15-1.5, preferably 0.9-1.2.

The content of organic solvent in the composition of the present invention (mixture of [A1 and 181) (total amount of organic solvent in [A] and organic solvent in [B]) is usually 50% or less, preferably 10% or less. ~40%
It is. When the amount of organic solvent exceeds 50%, the curing time becomes longer and the strength of the cured product decreases.

The composition of the present invention has a viscosity of a mixture of [A] and [B1 (
[A], [Viscosity (25°C) immediately after mixing B1] is usually 100 cpS or less, preferably 50 cpS or less.

Because the composition of the present invention has such a low viscosity, [A
], [B] The two liquids can be mixed by any method, and there is no need to use a mixing device such as a hand mixer or two-liquid mixing/dispensing machine, and the mixing can be easily done manually. . For example, [A] on one side (a) of two plastic buckets.
, take [B] in the other bucket (b) so as to have the proper liquid ratio, and put [B] in the bucket (b) into the packet (a) containing [A].
), then pour the entire amount of [A] and [B1 into (a
) to (b) and from (b) to (a) several times (for example, 2.3 times), the two liquids can be easily and uniformly mixed.

The mixture of the two liquids [A] and [B] thus obtained starts to generate heat after several tens of seconds to several minutes (you can feel the heat when you touch the side of the plastic bucket), and after several tens of seconds to several minutes after generating heat. Since the gelation occurs within 30 minutes after mixing the two components, impregnation and coating are performed immediately after mixing the two components.

To apply (impregnate/coat) the composition of the present invention to the interstices of a structure, any application means such as a brush, roller, rake, or trowel can be used. In some cases, a funnel may be used to inject and coat wide joints.

Cement structures such as concrete and mortar are particularly useful as objects to which the 'tl''j pickle gap impregnation/coating composition of the present invention is applied; structures, metals.

It can also be applied to various construction or architectural structures such as plastic, synthetic building materials, wood and stone.

The composition of the present invention can be applied to such concrete.

Cracks or cracks in structures such as mortar, especially minute gaps such as hair cracks, joints,
It is used to fill various gaps such as the gap between different materials such as the one place where the concrete frame and finishing mortar are peeled, and the gap between the structure and the ground such as concrete. (Especially lightweight concrete) 2 It can also be used to strengthen the surface by impregnating and coating minute gaps in porous (porous to microporous) surfaces of structures such as mortar.

After being impregnated and coated with the composition of the present invention, a top coat material may be applied as it is or in a cured state. Examples of topcoating materials include floor coating materials (urethane-based, epoxy-based, etc.), paint film waterproofing materials (urethane-based, epoxy-based, asphalt-based, etc.), and wall decorative materials (spraying materials, finishing paints, etc.).

[Examples] Hereinafter, the present invention will be specifically explained with reference to Examples, but the present invention is not limited thereto. In addition, parts and %
represent parts by weight and % by weight, respectively.

The raw materials used below are as follows.

(1) Aromatic polyamine Polyamine: diethyltoluenediamine.

Polyamine ■: Iharakyuamine ML 100 [manufactured by Ihara Chemical 0, Ltd.] Liquid polyamine made by dissolving IOCA in an ester plasticizer (polyamine content: approx. 35
%, amine value = 142-148°3 Age: Approx. 40
0 cpS/30℃).

Polyamine amount: methylenebis(2-methyl-6-inpropylaniline).

Polyamine ■v: Isophorone diamine.

(2) Polyisocyanate Isocyanate ■: Duranate D-201 [Asahi Kasei (
Made by Kiki, Bojnool cross-linked hexamethylene diisocyanate-based NCO-terminated urethane prepolymer (NCO content: 1
6%, viscosity: approximately 2800 cpS/25°C)].

Isocyanate component PAPI 135 [manufactured by Kasei Upjohn Kai◇, crude MDI (contains NCO!: approx. 31%).

Viscosity: approximately 200 cpS/25°C)].

Isocyanate ■: Polypropylene glycol (molecule f
f12000) and crude MDI from Nco-terminated 1-cretane prepolymer (NCO content M: 16%, viscosity: approx. 5000
cpS/25°C)].

] Isocyanate ■: Polypropylene glycol (molecular weight 1000) and NCO-terminated urethane prepolymer from TDI (NCO content, 5%, viscosity: approximately 10000 ps)
/25℃)].

Isocyanate ■: Isophorone diisocyanate Isocyanate ■: Polypropylene glycol (molecular weight 1500) and NCO-terminated urethane prepolymer from Ding DI (NCO content: 4.9%, viscosity: approximately 7000 cp)
S/20'C)].

(To B3 plasticizer: polyoxyethylene polyoxypropylene glycol (molecular weight 200) benzoic acid diester 9 Example 1 Part of polyamine Hioo and 25 parts of perchlorethylene were placed in a mixing pot, stirred for 15 minutes, and the viscosity was 40 cpS/
An active hydrogen atom-containing component A1 having a temperature of 20'C and a specific gravity of 1.14 was prepared.

Also, 0295 parts of isocyanate and 295 parts of xylene
of the mixture into a mixing pot and stirred for 15 minutes until the viscosity was 10 C1.
) S// 20'C, isocyanate component B1 having a specific gravity of 0.98 was prepared.

Next, we weighed 1.25 ffy of active hydrogen atom-containing component A1 into a 10 ffl poly bucket (a), and weighed 9 to 5.90 ffy of isocyanate component B7 into another 101-bottle bucket (b). A bucket containing (b
), immediately poured the entire amount of A1 and B1 back from (b) to (a), and by repeating this operation once again, the two liquids could be mixed uniformly.

The viscosity of the obtained homogeneous mixture (immediately after mixing) is 15C1)S
/20'C, specific gravity was 1.02.

Regarding the impregnating/coating composition for structure gaps of the present invention thus obtained, gelation time,
Shrinkage properties and water displacement curing properties were tested, and the above composition was used to impregnate gaps in concrete structures (PC boards for sidewalks) to test its impregnation properties. It was used to coat surfaces and was tested for foamability and open time.

The results of these tests are shown in Table 1.

Example 2 100 parts of polyamine ■, 10 parts of perchlorethylene and 50 parts of methoxybutyl acetate were charged into a blending pot.
The mixture was stirred for 15 minutes to prepare an active hydrogen atom-containing component A2 having a viscosity of 20 CI) S/20'C and a specific gravity of 1.02.

Also, incyanate ■100 parts, isocyanate ■10
1, 35 parts of perchlorethylene, and 50 parts of methoxybutyl acetate were placed in a blending kettle and stirred for 15 minutes to prepare incyanate component B2 having a viscosity of 35 cpS/20'C and a specific gravity of 1.05.

Next, 3 kg of active hydrogen atom-containing component A2 was added to the 101 poly bucket (a), and 2.5 kg of incyanate component B2 was added to the other 101 poly bucket (b)! j, and the two liquids were able to be mixed uniformly by the same operation as in Example 1.

The viscosity of the obtained homogeneous mixture (immediately after mixing) is 25CpS
/20°C, and the specific gravity was 1.03.

The thus obtained impregnation/coating composition for gaps in structures of the present invention was tested for gelation time, shrinkage, and water displacement curing properties in the same manner as in Example 1. It was used to coat the surface of impregnated mortar and the surface of PC board for sidewalks, and its impregnated property 9 foamability and open time were tested.

The results of these tests are shown in Table 1.

Example 3 100 parts of polyamine I, 100 parts of plasticizer A and 80 parts of perchlorethylene were placed in a blending pot and heated at 100°C.
The mixture was stirred and mixed for 1 hour to dissolve it, and 100 parts of methoxybutyl acetate was added thereto and stirred and diluted for 30 minutes. 50
After cooling to ℃, 80 parts of perchlorethylene was added and diluted with stirring for 30 minutes to give a viscosity of 15 CpS/20'C and a specific gravity of 1.
Active hydrogen atom-containing component A3 of No. 05 was prepared.

In addition, 0100 parts of isocyanate, 1 part of isocyanate
0 parts, 20 parts of perchlorethylene, and 40 parts of methoxybutyl acetate were placed in a mixing pot, stirred for 15 minutes,
Isocyanate component B3 having a viscosity of 20 cpS/20'C and a specific gravity of 1.05 was prepared.

Next, 3.0 kg of active hydrogen atom-containing component A3 was placed in a 101 poly bucket (a), and the other 10 f! 3.0 kg of isocyanate component B3 was weighed in a poly bucket (b), and Example 1
The two liquids could be mixed uniformly using the same procedure.

The viscosity of the obtained homogeneous mixture (immediately after mixing) is 18C1)S
/20'C, specific gravity was 1.06.

The thus obtained impregnation/coating composition for gaps in structures of the present invention was tested for gelation time, shrinkage, and water displacement curing properties in the same manner as in Example 1. Impregnation 1 It was used to coat mortar surfaces and sidewalk PC board surfaces, and its impregnation 2 foamability and open time were tested.

The results of these tests are shown in Table 1.

Comparative Example 1 80 parts of polyamine IV and 20 parts of perchlorethylene
of the mixture into a mixing pot and stirred for 15 minutes until the viscosity was 12CpS.
/20'C, active hydrogen atom-containing component a with specific gravity 1.39
1 was prepared.

Further, 050 parts of isocyanate and 50 parts of xylene were charged into a mixing pot, stirred for 15 minutes, and the viscosity reached 25. Cps
/20'C and a specific gravity of 0.97, an isocyanate component b1 was prepared.

Next, 580 g of the active hydrogen atom-containing component a1 was weighed in the 11 poly bucket (a), and 1.6 Ky of the isocyanate component b2 was weighed in the other 11 poly bucket (b). When poured into (b), it instantly reacted and gelled, making it impossible to mix the two liquids at all.

Comparative Example 2 3 OKg of the same active hydrogen atom-containing component △2 as in Example 2 was added to the 101 poly bucket (a), and 4 kg of isocyanate ■ (specific gravity 1.03) was added to the other 101 poly bucket (b).
．． 3 kg was weighed and an attempt was made to mix the two liquids in the same manner as in Example 1, but the two liquids could not be mixed uniformly, so the two liquids were mixed using a hand mixer.

The viscosity of the obtained homogeneous mixture (immediately after mixing) is 3500C1
)S/'20'C, specific gravity was 1.02.

The thus obtained impregnating/coating composition for gaps in structures was tested for gelation time, shrinkage, and water displacement curing properties in the same manner as in Example 1. It was used to coat the surface of a PC board for sidewalks, and its impregnation, foaming properties, and open time were tested.

The results of these tests are shown in Table 1.

Table 1 [Note 1 Each test method is as follows.

*1: Active hydrogen atom-containing component [AI and isocyanate component [B] are mixed manually according to the procedure described in Example 1. If it is difficult to mix uniformly by hand, mix with a hand mixer.

○: Can be mixed uniformly by hand.

×: It was difficult to mix uniformly by hand, but it was possible to mix uniformly with a hand mixer.

*2: Mix active hydrogen atom-containing component [AI and isocyanate component [B], put 100 g of the mixture into a polycup, and measure the time until the fluidity of the two-component mixture completely disappears (liquid temperature, ambient temperature 20'C).

*3: Shrinkability: Active hydrogen atom-containing component [AI and isocyanate component [B] are mixed, 100 g of the mixture is placed in a polycup, left to harden at 20'C for 3 hours, and demolded. Draw a circle on the top surface of the cured product with a marker and measure its diameter with a caliper. Next, the cured product was cured at 20'C.
After applying the device, its diameter is measured again using calipers, and the shrinkage rate is calculated using the following formula.

Q: Shrinkage rate ≦5%.

X: Shrinkage rate>5%.

*4: Water displacement curability: Coarse aggregate (maximum particle size 20 mm, specific gravity 2.6 to 2.7) containing active hydrogen atoms at 20'C into a 11 plastic container containing approximately 1 kg and 500 d of water. Mixture 5009 of component [AI and isocyanate component [B] was slowly poured in, left to stand for 3 hours, the cured product was removed from the mold, and the state of entrapment of the coarse aggregate by the cured product was observed.

○: The two-component mixture sinks into the water, Hardened by incorporating coarse aggregate.

X: Two-component mixture floats on the water surface, coarse aggregate Hardened without incorporating.

*5: PC board for walking (300s x 300mm x 5
0 mm) sides (300 mm x 50 mm) are brought together, and putty is applied to the bottom and both sides where they meet. Mixture 209 of active hydrogen atom-containing component [AI and isocyanate component [B] was slowly heated to 20° C.
Pour the mixture onto the top surfaces of two PC boards and leave to harden for 3 hours. Next, the two PC boards were separated to their original appearance, and the state of the cured material that had penetrated the sides of the PC boards was observed with the naked eye.

0: 80% or more of the cured product was attached to the side surface of the PC board.

X: Less than 80% of the cured product was attached to the side surface of the PC board.

East 6: Mix 1R12 mortar and pour into a plastic container to a thickness of approximately 3cm. The surface is smoothed using a mirror. After curing at room temperature for 4 hours, a mixture of an active hydrogen atom-containing component [AI and an isocyanate component [B] was quickly applied to the surface with a brush, and the mixture was cured at room temperature. After 24 hours, the surface condition of the cured product (presence or absence of foaming) is observed with the naked eye.

Q: Almost no foaming is observed on the surface.

×: Clear foaming is observed on the surface.

*7: Apply a mixture of active hydrogen atom-containing components [AI and isocyanes 1 to 1 to 2 components [B] to a PC board for pedestrian use. -600 (Sanyo Chemical Industries (body made, main material/curing agent weight ratio 4/1, pot life 1 minute, hardness (Shore D) 8.5)
After 1 day, 3 days, 5 days, and 7 days, apply with a two-component mixing spray device (manufactured by Toshi Engineering 0 Shu),
Measure the adhesive strength (juice type tensile test). The open time is defined as the application interval that can maintain an adhesive strength reduction rate of 60%.

[Effects of the Invention] The impregnation/coating composition for structural gaps of the present invention has the following effects.

(1) Due to its excellent permeability, it penetrates deep into cracks in structures such as concrete and mortar, especially very narrow microscopic gaps such as hair cracks, forming a hardened product that strengthens these cracks. Can be combined and repaired.

(2) Since the solvent content is low, there is less shrinkage after curing.
The gap can be reliably sealed.

(3) It has quick hardening properties and gels within 30 minutes even in winter, so it has the great advantage of completing repair treatments in a short time.

(4) It does not require complicated equipment such as a hand mixer or a two-liquid mixing and discharging machine, and can be easily mixed by hand using a plastic bucket or the like, making the operation very simple. [Generally, a two-component mixing and dispensing machine with a static mixer is used to apply a two-component fast-curing coating composition with gelation time of 30 minutes or less, but this dispensing machine is a heavy item that is difficult to carry by one person. .

The work is very troublesome because it usually requires a 200 volt power supply and requires considerable skill from the operator; on the other hand, the composition of the present invention does not require such complicated equipment and operations. The operator does not need to be particularly skilled. ] (5) Since it has rapid curing properties and can be cured even in water, it can be effectively applied to gaps where water leaks, and can achieve water leakage prevention and water stoppage effects. Particularly, those having a specific gravity higher than 1 can penetrate under water and replace water to form a cured product, thereby firmly fixing and sealing gaps in structures.

(6) Almost no foaming occurs during curing, and gaps can be firmly filled. Moreover, the curing speed, strength of the cured product, etc. are not affected by the presence or absence of water present in the gap and the amount of water, and curing can be achieved with good reproducibility.

(7) Since it has a long open time before topcoating, it is also effective as a fast-curing primer.

(8) Even in cold regions, the composition has a small increase in viscosity, is workable, and hardens smoothly.

Because it has the above-mentioned effects, the composition of the present invention can be used to impregnate and impregnate gaps in structures such as concrete and mortar.
It is useful as a coating, especially as a crack repair material for these structures, a joint filling/repair material 2 surface impregnation/coating strength improving material, etc.

Claims (1)

[Scope of Claims] 1. [A] an active hydrogen atom-containing component consisting of an organic solvent solution of aromatic polyamine (a) having an amine equivalent of 500 or less, and [B] a non-aromatic polyisocyanate or other components thereof. Organic polyisocyanate consisting of polyisocyanate (
It consists of two components, including the isocyanate component consisting of an organic solvent solution of b), and the viscosity of the mixture of [A] and [B] is 10
An impregnation/coating composition for interstices in structures, characterized by having a gelation time of 0 cpS or less and within 30 minutes. 2. The composition according to claim 1, wherein the aromatic polyamine has a halogen, alkoxy or alkyl substituent at the ortho position of the amino group. 3. The composition according to claim 1 or 2, wherein [A] and [B] are used in a ratio such that the NCO/active hydrogen atom-containing group ratio is 0.5 to 1.5. 4. The composition according to claim 1, 2 or 3, wherein the mixture of [A] and [B] has a specific gravity of 1 or more. 5. The composition according to any one of claims 1 to 4, wherein the content of the organic solvent is 50% or less based on the total weight of [A] and [B]. 6. Claims 1 to 5, wherein the structure gap is a crack or cracked part of a concrete or mortar structure
A composition according to any of paragraphs.