JP2002265921A - Water-based mastic adhesive composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-VOC-type water-based mastic adhesive composition which is perfectly nonproblematic in hazards and environmental problems occasioned by organic solvents and exhibits excellent adhesiveness and water resistance without detriment to initial hold (broadly defined as the ability of an adhesive composition to resist the slide of an adherend on a substrate in the initial stage of application) comparable to that of a solvent-based mastic adhesive. SOLUTION: This composition is a water-based mastic adhesive composition prepared by adding (B) an inorganic powdery filler containing 50-100 wt.% silicon dioxide to (A) an aqueous dispersion of a polymer containing glycidyl groups in the molecule, wherein the content of nonvolatiles is in the range of 60-90 wt.%, the viscosity is in the range of 200-1,000 Pa.s, and the structural viscosity index is in the range of 1.5-8.0.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aqueous mastic type adhesive having an initial setting property, water resistance and a wide range of adhesiveness. The present invention is suitable as a so-called non-VOC type aqueous mastic type adhesive containing no volatile organic compound.

[0002]

2. Description of the Related Art It has high viscosity and paste-like rheological properties, and has an initial settability (in general, a property that does not cause displacement or sagging at the time of initial bonding of an adherend. The mastic type adhesive excellent in (2) refers to a solvent-based adhesive. If this is used as an aqueous adhesive, excellent initial settability cannot be obtained, and the properties of the solvent-based mastic adhesive, such as a decrease in water resistance and a limited range of adhesion, will be significantly reduced in adhesive performance. However, since the solvent mastic type adhesive has the danger and harmfulness derived from the organic solvent while having excellent properties, there is a strong demand from the industry for aqueous conversion.
Furthermore, from the viewpoint of healthy housing, such as reducing environmental problems and sick house problems, volatile organic compounds (Volatile Organic Compounds)
Reduction of compounds is an important issue in the adhesive industry, but mastic adhesives that provide this excellent workability have not been water-based. Furthermore, since a water-based mastic type adhesive has not been realized, it must be said that a water-based mastic type adhesive containing no volatile organic compound such as an organic solvent and a plasticizer is a very difficult subject.

[0003]

The solvent-based mastic type adhesive has good workability, which is the working characteristic, does not cause sagging, and does not cause misalignment or sagging at the time of initial bonding of the adherend, that is, the initial fit. Is to develop a water-based mastic type adhesive that exhibits a wide range of adhesiveness to a wide range of adherends of the solvent-based mastic type adhesive and water resistance while maintaining the property, and contains volatile organic compounds. The object of the present invention is to provide a so-called non-VOC type water-based mastic type adhesive.

[0004]

Means for Solving the Problems The present inventors selected a backbone polymer for an adhesive, searched for an aqueous dispersion of a polymer by using the aqueous solution technology, selected a filler that interacts with the aqueous polymer dispersion, Through a multifaceted and comprehensive research and development of viscosity imparting technology, it was discovered that a certain specific range of blending technology could make this possible. Further studies have shown that the product of the present invention is an excellent aqueous mastic without the addition of a small amount of an organic solvent or a volatile organic compound such as a plasticizer that has been routinely used in a multipurpose aqueous adhesive. Mold adhesive, that is, so-called non-VO
We developed a C-type water-based mastic type adhesive and completed the present invention.

Hereinafter, the technical means of the present invention will be specifically described. The invention of claim 1 is an aqueous mastic type comprising (A) an aqueous polymer dispersion containing a glycidyl group in a molecule and (B) an inorganic powder filler containing 50 to 100% by weight of silicon dioxide. An adhesive composition having a nonvolatile content of 60 to 90% by weight and a viscosity of 200 to 1000 Pa
* S, It relates to an aqueous mastic type adhesive composition characterized by having a structural viscosity index in the range of 1.5 to 3.0.
By defining the composition of the constituents and defining the rheological properties, it is possible to obtain a water-based mastic adhesive having basic initial settability and water resistance. The aqueous mastic type adhesive composition of the present invention can be obtained as long as the nonvolatile content, viscosity and structural viscosity index are within the above ranges only by the combination of (A) and (B).

According to a second aspect of the present invention, in the adhesive composition, the compounding weight ratio of (A) the polymer component / (B) the inorganic powder filler is in the range of 100/20 to 100/200. The water-based mastic type adhesive composition according to claim 1, which is characterized in that: This blending ratio is the range where the initial settability and water resistance are the best. According to a third aspect of the present invention, in the adhesive composition, the polymer component (A) comprises a glycidyl group-containing polymerizable monomer / styrene monomer, C1
Weight ratio of one or more polymerizable monomers selected from (meth) acrylates and fatty acid vinyl esters of
The aqueous mastic type adhesive composition according to claim 1 or 2, wherein the polymer is in the range of / 500 to 150/500.

(A) When the polymer of the aqueous dispersion of a polymer containing a glycidyl group in the molecule is in this range, it has a high degree of water resistance and excellent adhesion to a wide range of adherends such as metals, plastics, cement materials, and wood. Imparts properties. According to a fourth aspect of the present invention, in the adhesive composition, the inorganic powder filler of (B) has a particle size distribution of 270 mesh through 70 to 1
The water-based mastic type adhesive composition according to any one of claims 1 to 3, wherein silica sand (silica powder) is used in an amount of 00% by weight. (B) When the inorganic powder filler containing 50 to 100% by weight of silicon dioxide uses silica sand in this range, the initial settability and water resistance are the best.

[0008] The invention of claim 5 is characterized in that in the adhesive composition, at least one selected from hydroxyethylcellulose (HEC), methylcellulose (MC) and carboxycellulose (CMC) is used as a viscosity improver. The aqueous mastic type adhesive composition according to any one of claims 1 to 4. Claim 1
When the above viscosity improver is used in the inventions of (1) to (4), the initial settability is the best. This technical means has a nonvolatile content of 60 to 80% by weight and a viscosity of 200 to 1000 Pa ·
s, the best way to obtain rheological properties with a structural viscosity index in the range of 1.5 to 3.0.

The invention according to claim 6 is the aqueous mastic type adhesive composition according to any one of claims 1 to 5, wherein the adhesive composition does not contain a volatile organic compound. About things. In other words, the aqueous mastic type adhesive composition according to any one of claims 1 to 5 basically has no initial volatile organic compound, and is as good as a solvent type mastic type adhesive. Gives water repellency and water resistance. In particular, when the polymer according to the third aspect of the present invention is used, it does not contain a volatile organic compound and has excellent water resistance and excellent adhesiveness to a wide range of adherends such as metals, plastics, cement materials, and woods. Can be provided.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a method of blending (A) an aqueous polymer dispersion containing a glycidyl group in a molecule with (B) an inorganic powder filler containing 50 to 100% by weight of silicon dioxide. An aqueous mastic type adhesive composition having a non-volatile content of 60 to
90% by weight, preferably 70 to 85% by weight, more preferably 70 to 80% by weight, having a viscosity of 200 to 1000 Pa · s
, Preferably 200 to 500 Pa · s, more preferably 2 Pa
50-400 Pa · s, structural viscosity index 1.5-3.0,
Preferably 1.7 to 2.7, more preferably 1.5 to
It is characterized by being in the range of 2.5.

First, an aqueous polymer dispersion containing a glycidyl group in the molecule (A) according to the present invention will be described.
(A) A polymer aqueous dispersion containing a glycidyl group in the molecule is usually an unsaturated monomer having a glycidyl group in the molecule (monomer) and another polymerizable unsaturated monomer (monomer).
Can be obtained by means of emulsion copolymerization. Usually, 50 to 100% by weight of (B) silicon dioxide is added to the aqueous polymer dispersion obtained by such emulsion copolymerization,
Preferably 70 to 100% by weight, more preferably 90 to 100% by weight.
After blending an inorganic powder filler containing 100% by weight, kneading is performed.

In this case, an aqueous polymer dispersion may be obtained using a polymerization kettle, and an inorganic powder filler may be directly added to the kettle. The obtained aqueous polymer dispersion is transferred to an aqueous processing kettle. After blending the inorganic powder filler, kneading may be performed. Further, after blending the inorganic powder filler with the aqueous emulsion solution for polymerization, emulsion copolymerization may be performed. Among these methods, since the present invention has a high viscosity, a method in which the obtained polymer aqueous dispersion is transferred to an aqueous processing pot, an inorganic powder filler is blended, and then kneading is performed, has a high production efficiency. preferable.

The compounding weight ratio of the polymer component (A) / (B) is 100/20 to 100/200, preferably 100/20.
30-100 / 100, more preferably 100 / 40-
The range of 100/70 is good for the balance of blending stability, adhesion performance, and economy. When the blending ratio by weight of (B) is less than 20, it is difficult to obtain a desired non-volatile content, it is difficult to maintain the initial settling property, and it is economically disadvantageous because the weight ratio of the filler is reduced. Become. On the other hand, if the weight ratio exceeds 200, it becomes difficult to mix the filler, and the amount of the filler becomes excessive, which affects the adhesive performance.

Next, the content of the glycidyl group of the present invention will be described. When the aqueous polymer dispersion containing a glycidyl group in the molecule (A) of the present invention is obtained, the content of the glycidyl group in the copolymer is 1 to 20% by weight, preferably 1 to 10% by weight, per polymer. Preferably 3 to
It is preferable to design at 7% by weight in order to obtain water resistance and blending stability. If the amount is less than 1% by weight, water resistance and adhesion to a wide range of adherends are inferior. If the amount is more than 20% by weight, the stability of the polymer dispersion is impaired and coarse particles are generated or abnormal thickening is caused. Easier to do. The unsaturated monomer having a glycidyl group (monomer) is a polymerizable compound having a glycidyl group in a molecule. Specific examples include glycidyl acrylate, glycidyl methacrylate, glycidyl vinyl ether, and allyl glycidyl ether.

Examples of the monomer copolymerizable with the unsaturated monomer having a glycidyl group include alkyl acrylates having an alkyl group having 1 to 20 carbon atoms (eg, ethyl acrylate, butyl acrylate, acryl acrylate). Acid 2-ethylhexyl), alkyl group having 1 to 2 carbon atoms
Alkyl methacrylates up to 0 (eg, methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, etc.),
Fatty acids having 1 to 10 carbon atoms such as vinyl fatty acid (eg, vinyl acetate, vinyl propionate, vinyl versatate, etc.), styrene, diene-based monomers (eg, chloroprene, butadiene, isoprene, etc.), vinyl chloride, vinylidene chloride, Acrylic acid, methacrylic acid, maleic acid monoester, maleic acid diester and the like are used.

Examples of a polymerization initiator for emulsion polymerization of a monomer copolymerizable with an unsaturated monomer having a glycidyl group include organic peroxides such as hydrogen peroxide and benzoyl peroxide, ammonium persulfate, and peroxides. Potassium sulfate, sodium persulfate, azobisisobutyronitrile and the like can be used. These initiators can also be used as redox initiators in combination with reducing agents such as tartaric acid, Rongalit, sodium bisulfite, ascorbic acid and the like. The amount of the polymerization initiator to be used is, for example, 0.1 part by weight based on 100 parts by weight of the total amount of the monomers (the unsaturated monomer having a glycidyl group and the polymerizable unsaturated monomer other than the unsaturated monomer). It is about 0.5 to 2 parts by weight. The amount of the reducing agent used when using the redox initiator can be appropriately set according to the type of the initiator and the like. As a chain transfer agent, dodecyl mercaptan or the like may be added to the system.

As the emulsifier used in the emulsion polymerization of the present invention, one or more kinds of nonionic surfactants and anionic surfactants are selected and used in relation to (B). In the above, use of a reactive surfactant represented by sodium styrene sulfonate is preferable because of excellent water resistance and adhesiveness. The amount of the emulsifier is 0.1 to 10% by weight based on the total amount of the monomers. When the amount is less than 0.1% by weight, generation of coarse particles, abnormal thickening, and sometimes gelation are caused due to insufficient emulsifier, and when it exceeds 10% by weight, water resistance and adhesiveness decrease.

Of these, when performing emulsion polymerization,
The polymer component (A) has a weight ratio of at least one polymerizable monomer selected from glycidyl group-containing polymerizable monomer / styrene monomer, C1-20 (meth) acrylate, and fatty acid vinyl ester in a range of 5/500 to 150 /. 50
It is preferable to make the polymer in the range of 0, preferably 10/500 to 100/500, more preferably 20/500 to 50/500, for the reason of balance of adhesive performance, water resistance and economy. (B) The inorganic powder filler refers to silicon dioxide in an amount of 50 to 100% by weight, preferably 70 to 100% by weight.
%, More preferably 90 to 100% by weight. Specific examples thereof include white carbon, silica, silica sand (silica powder), aerosil, and diatomaceous earth. One or more of these are selected and blended. be able to.

If the amount is less than 50% by weight, it is difficult to mix with a polymer aqueous dispersion containing a glycidyl group in the molecule, and it is difficult to obtain the rheological properties of the present invention. In this case, the nonvolatile components of the present invention cannot be obtained. Further, the higher the content of silicon dioxide, the more excellent the chemical stability and the higher the water resistance, the lower the water resistance is, the lower the water resistance becomes. In particular, in the case of (B), when silica sand (silica powder) having a particle size distribution of 270 mesh and 70 to 100% by weight is selected, homogeneous mixing becomes easy, and coarse particles are not generated even in a state of high nonvolatile content. The rheological properties of the present invention can be easily obtained, and the water resistance is the most excellent.

The rheological properties of the present invention refer to viscosity values and structural viscosities. The viscosity of the present invention refers to a viscosity at 23 ° C. of 10 using a Brookfield viscometer (B-type viscometer).
Indicated by rotation value. Structural viscosity index (TI) of the present invention
The term "meaning" means that a 10-rotation value and a 4-rotation value are measured using a B-type viscometer, and a value obtained by rounding the ratio of the 4-rotation value / 10-rotation value to two decimal places is used as an index. JIS
It is an index showing the weight loss / original weight after standing at 105 ° C. for 1 hour in percentage according to K6828. These rheological properties are such that the non-volatile content is 60 to 90% by weight and the viscosity is 200 to 1000 by mixing (A) / (B).
It is sufficient if the Pa · s and the structural viscosity index can be in the range of 1.5 to 3.0, but it is preferable to add a viscosity improver to further improve the initial settability.

As these viscosity improvers, it is preferable to use one or more selected from hydroxyethylcellulose (HEC), methylcellulose (MC) and carboxycellulose (CMC) in order to give a good initial settability. The amount is preferably from 0.3 to 5 parts by weight, preferably from 0.5 to 3 parts by weight, more preferably from 0.5 to 1 part by weight, based on 100 parts by weight of the aqueous polymer dispersion. Good for a reason. If it is less than 0.3 parts by weight, the initial settability tends to decrease, and if it exceeds 5 parts by weight, the water-resistant adhesiveness due to the addition of a large amount of water-soluble polymer tends to decrease. This viscosity improver may be dissolved in the aqueous phase during the emulsion polymerization.

Since the adhesive composition of the present invention aims at a non-VOC type aqueous mastic type adhesive composition, it is not necessary to blend an organic solvent, a high boiling point organic solvent and a plasticizer generally used in an emulsion. In some cases, VOC is unintentionally contained as a diluent for various modifiers. Therefore, they do not hinder the blending. Other ingredients, depending on the purpose, pigments, dyes, preservatives, defoamers, rust inhibitors, flour,
Corn starch and the like can be appropriately blended.

Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples. In addition, the following examples, "the initial settability", "water resistance", "adhesion", "mixing stability" of the aqueous mastic type adhesive composition obtained in the comparative examples were evaluated by the following methods. Was. "Initial Settability" JIS A5537 JI for Wood Brick
The test was performed based on the S shift test. After applying the adhesive to the wooden bricks, a spacer (0.8 mm steel wire) is placed and adhered to the slate while moving back and forth. Immediately fix it vertically and measure the length of the wood brick that has fallen off after 72 hours. The quality of the initial settling was evaluated based on the occurrence of deviation. ：: 0 mm △: Greater than 0 mm and smaller than 5 mm ×: 5 mm or more Above, the practical range of the present invention is 以上 or more. "Water resistance" A birch (hardwood material) with a thickness of 10 mm cut into 2.5 cm x 4 cm and a slate with a thickness of 5 mm cut into 6 cm x 6 cm are prepared. After applying the adhesive to the cover, a spacer (a 0.8 mm steel wire) is placed, and adheres to the slate while moving back and forth. After bonding and curing for 5 days, immerse in water for 24 hours. With this test piece wet, a tensile test was performed using a digital force gauge to measure the adhesive strength by a uniaxial tensile test (tensile speed: 5 mm / min, n = 5, unit: N / mm ² )

"Adhesiveness" A stainless steel plate with poor adhesion was selected as the adherend. A test for tensile split adhesive strength was performed according to JAI 11 Metal Non-Slip Adhesive. After applying an adhesive to SUS304, a spacer (0.8 mm steel wire) was placed, adhered to the slate while moving back and forth, and after curing for 5 days, a tensile split test was performed. The adhesive strength is the maximum strength at the initial stage of splitting (tensile speed: 5 mm / min, n = 5, unit: N / 25 mm). "Blending stability" The blending stability was evaluated for the possibility of homogeneous mixing. ：: Adhesive compounding can be performed without generating coarse particles, etc. △: Coatable adhesive can be obtained although some coarse particles are generated. ×: Coarse particle generation, rapid increase during compounding of adhesive The practical range of the present invention is set to 以上 or more, because of the stickiness and the inability to obtain an applicable adhesive.

Example 1 Water in a flask equipped with a reflux tube
25.4 parts by weight, anionic surfactant (sodium alkyldiphenyl ether disulfonate, active ingredient = 30
%) 0.1 part by weight and 0.01 part by weight of potassium persulfate are charged 8
Adjust to 0 ° C. In a separate flask with stirring blades, 19.5 parts by weight of water, anionic surfactant (sodium alkyl diphenyl ether disulfonate, active ingredient = 30%) 1
Parts by weight, 1 part by weight of sodium styrene sulfonate, nonionic surfactant (polyoxyethylene alkyl ether,
(HLB = 16.0) 0.5 part by weight is charged and dissolved by stirring to prepare an emulsifier aqueous solution.

Glycidyl methacrylate (GM)
A) A mixture of 3 parts by weight, 30 parts by weight of iso-butyl methacrylate (i-BMA), and 20 parts by weight of 2-ethyl-hexyl acrylate (2EHA) was gradually added to the emulsifier aqueous solution. Make a monomer emulsion. This monomer emulsion is dropped into a flask equipped with a reflux tube over 2 hours to carry out polymerization. At that time, potassium persulfate was used as the polymerization initiator.
Use 1 part by weight (10% aqueous solution). The emulsion thus obtained had a non-volatile content of 55.9% and a pH of 5.8.
To 100 parts by weight of this emulsion, 1.5 parts by weight of an anionic surfactant as a mixing aid, 1.5 parts by weight of a POE-POP condensate, 0.65 parts by weight of methylcellulose (MC) as a viscosity improver, and a particle size distribution of 70 50 parts by weight of １００100% by weight of silica sand was blended. The aqueous mastic type adhesive composition thus obtained has a nonvolatile content of 71.0% and a viscosity of 29%.
The structural viscosity index was 6 Pa · s and the structural viscosity index was 2.2. With respect to this aqueous mastic type adhesive composition, the above-mentioned "initial setting property", "water-resistant adhesive property", "adhesive property" and "formulation stability" were evaluated, and the results shown in Table 1 below were obtained. The “water-resistant adhesiveness” and “adhesiveness” are shown in parentheses “kgf
/ Cm ² ”unit and“ kgf / 2.5 cm ”number. (The same applies to the following examples and comparative examples.)

Example 2 The monomer composition of Example 1 was changed to 3 parts by weight of glycidyl methacrylate (GMA) and styrene (St) 25.
The same procedure as in Example 1 was carried out except that the weight part was changed to 25 parts by weight of 2-ethyl-hexyl acrylate (2EHA), and the results shown in Table 1 below were obtained. Example 3 The monomer composition of Example 1 was changed to 3 parts by weight of glycidyl methacrylate (GMA), 22 parts by weight of styrene (St), vinyl versatate (trade name: Veo, manufactured by Shell Chemicals)
Va9 :) 3 parts by weight, 2-ethyl hexyl acrylate (2EHA) 25
Except that the amount was changed to parts by weight, the same procedure as in Example 1 was performed, and the results shown in Table 1 below were obtained. Example 4 The procedure of Example 1 was repeated except that methylcellulose (MC) was changed to 1 part by weight of hydroxyethyl cellulose (HEC), and the results shown in Table 1 below were obtained. (Example 5) The same procedure as in Example 1 was carried out except that the filler of Example 1 was changed to 50 parts by weight of clay (82.0% by weight of silicon dioxide), and the results shown in Table 1 below were obtained. (Example 6) The procedure of Example 1 was repeated except that the filler used in Example 1 was changed to 50 parts by weight of talc (60.0% by weight of silicon dioxide), and the results shown in Table 1 below were obtained.

Comparative Example 1 Example 1 was repeated except that the monomer composition of Example 1 was changed to 30 parts by weight of i-butyl methacrylate (i-BMA) and 20 parts by weight of 2-ethyl-hexyl acrylate (2EHA).
And the results shown in Table 1 below were obtained. (Comparative Example 2) The filler of Example 1 was replaced with heavy calcium carbonate (
The procedure was the same as in Example 1, except that the weight was changed to 50 parts by weight. The results shown in Table 1 below were obtained.

Comparative Example 3 Methylcellulose of Example 1
(MC) is an alkali swelling type thickener (manufactured by Rohm and Haas Japan KK, trade name: Primal ASE60)
Except that the amount was changed to 1 part by weight (in terms of non-volatile content), the procedure was the same as in Example 1. The resulting mixture contained large coarse particles and had a significant increase in viscosity, making it difficult to measure the viscosity and the structural viscosity index. In addition, application to the adherend was difficult from that state, and various measurements were not performed. (Comparative Example 4) Except that methyl cellulose in Example 1 was changed to 1 part by weight (in terms of non-volatile components) of a urethane associative thickener (trade name: Adecanol UH420, manufactured by Asahi Denka Kogyo Co., Ltd.). The results shown in Table 1 below were obtained. In the above, the practical range of the present invention is ○ or more.

[0030]

[Table 1]

[0031]

According to the present invention, all the dangers and environmental problems derived from organic solvents are solved, and excellent adhesiveness is maintained while maintaining the initial settling property comparable to that of the solvent-based mastic type adhesive. Since it is possible to provide a non-VOC type water-based mastic type adhesive exhibiting water resistance, it will play an extremely important role in society in the future.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C09J 103/18 C09J 103/18 125/08 125/08 131/00 131/00 133/04 133/04 F Term (reference) 4J040 BA082 DB041 DE001 DF041 DF051 GA11 HA306 JA03 JB09 KA03 KA25 KA42 LA06 LA07 4J100 AB02P AC03P AC04P AE09Q AE18Q AG02P AG04P AJ02P AL03P AL04P AL04R AL05P AL10PAP03 AS03 FA03 AS03P

Claims (6)

[Claims] 1. An aqueous dispersion of a polymer containing a glycidyl group in a molecule, wherein (B) silicon dioxide is added in an amount of 50 to 50%.
An aqueous mastic type adhesive composition comprising an inorganic powder filler containing 100% by weight, having a nonvolatile content of 60 to 90% by weight, a viscosity of 200 to 1000 Pa · s, and a structural viscosity index of 1.5. Aqueous mastic type adhesive composition characterized by being in the range of -3.0. 2. In the above adhesive composition, the compounding weight ratio of (A) the polymer component / (B) the inorganic powder filler is 10%.
The aqueous mastic type adhesive composition according to claim 1, wherein the composition is in the range of 0/20 to 100/200. 3. The adhesive composition according to claim 1, wherein the polymer component (A) is at least one polymer selected from glycidyl group-containing polymerizable monomer / styrene monomer, C1-20 (meth) acrylate, and fatty acid vinyl ester. The aqueous mastic type adhesive composition according to claim 1 or 2, wherein the weight ratio of the hydrophilic monomer is a polymer in the range of 5/500 to 150/500. 4. The adhesive composition as claimed in claim 1, wherein the inorganic powder filler (B) has a particle size distribution of 270 mesh passing
The aqueous mastic type adhesive composition according to any one of claims 1 to 3, wherein silica sand (silica powder) is used in an amount of 0 to 100% by weight. 5. The adhesive composition according to claim 1, wherein hydroxyethyl cellulose (HEC), methyl cellulose (MC), carboxy cellulose (CMC) are used as viscosity improvers.
The aqueous mastic type adhesive composition according to any one of claims 1 to 4, wherein at least one selected from the group consisting of: 6. The aqueous mastic type adhesive composition according to claim 1, wherein the adhesive composition does not contain a volatile organic compound.