JPH0335351B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a water-based pressure-sensitive adhesive that is applied to walls of structures for mortar finishing. More specifically, the new and
We have further improved the water-based pressure-sensitive adhesive (Japanese Patent Application Laid-Open No. 58-40377), which has adhesive properties with raw mortar that does not change over time, is waterproof, and shortens the process, and has been further improved while maintaining the above functions. The present invention relates to a new adhesive that has a termite- and house-mite-proofing function that has not been seen before. Furthermore, by applying the present invention to the wall base material of a structure, it not only has a waterproof function and an adhesion function to both the wall base material and green mortar, but also provides excellent termite and mite protection for the wall base material. The present invention relates to a water-based pressure-sensitive adhesive that can simultaneously satisfy the following functions in one construction step. Conventionally, mortar painting on the exterior or interior walls of structures has been done by pasting lath paper, rubber or resin sheets on the base material, mechanically fixing wood or lath wire mesh, and spraying green mortar on top of it. It is finished with a trowel. In this method, the woodwork and lath wire mesh are usually fixed with nails and staples, so water often leaks from the nail holes and staple holes to the back side. Various types of adhesives have been used to bond green mortar and walls together, and these have solved these shortcomings and succeeded in saving labor at the same time.However, these also require a short period of time from the time the adhesive is applied to the wall until the time the green mortar is placed. It has the disadvantage of being limited. In other words, if the adhesive is exposed outdoors after being applied to a wall surface, it will undergo changes over time, UV deterioration, heat resistance deterioration, etc., and the adhesion with raw mortar will be significantly reduced, which is a fatal drawback of this type of adhesive. . In reality, the process of placing green mortar is covered with black polyethylene sheets, etc., but this requires a lot of labor and is often peeled off or damaged by wind and rain, making the effort unrewarding in many cases. Recently, in order to solve this problem, a water-based pressure-sensitive adhesive has appeared, and the above-mentioned drawbacks have been solved and it has become almost satisfactory in terms of green mortar adhesion that does not change over time, waterproofness, and labor saving. I came. However, in this conventional way of thinking, although the adhesion performance as an adhesive is sufficient and it is durable, problems arise when considering the use as a whole, that is, as a structure. In other words, the housing situation in recent years has seen advances in air-conditioning, air-tightness, etc. due to the desire for greater comfort between homes.
As a reaction to this, the walls of the structure are inevitably made into an environment with suitable temperature and humidity for harmful organisms such as microorganisms due to condensation water and the like. Such pests include mites, wood-decaying fungi, wood-boring insects, and wood-boring pests, but the damage caused by termites and mites is particularly severe. Therefore, in recent years, an insect repellent treatment process has been purposefully set up, and insect repellent measures have been taken at a cost and time. However, for water-based pressure-sensitive adhesives, measures have been taken in the past to prevent corrosion of the water-based pressure-sensitive adhesive itself and to prevent deterioration after forming the adhesive layer; As a countermeasure, the present invention departs from the protection of the adhesive itself and takes insect repellent measures for the adhesive base itself. In other words, by adding an insect repellent function to a water-based adhesive that exhibits excellent durable adhesion and waterproof properties, including the conventional function of adhesion to raw mortar after aging, it is possible to prevent dust mites from forming on the wall base materials of structures. It not only prevents damage from termites and termites, eliminates the traditional insect repellent treatment process such as spraying and roll bag application, reduces occupational safety and health problems during the treatment process, and also helps reduce costs. , a water-based pressure-sensitive adhesive that provides a function that cannot be found in conventional water-based pressure-sensitive adhesives, such as ensuring comfortable living, and improves the adhesion with raw mortar without impairing it. As a result of intensive research aimed at obtaining the above object, it was confirmed that the present invention meets the above object, and the present invention was completed. That is, the present invention provides an acrylic resin emulsion in which an acrylic resin with a molecular weight of 300,000 or more containing 30% by weight or less of styrene, vinyl acetate, or styrene and vinyl acetate in the form of a copolymer is dispersed in water with a nonionic surfactant. and the softening temperature is 100~150℃
A terpene resin emulsion prepared by dispersing a terpene resin in water with a nonionic surfactant, and a weight ratio of the acrylic resin and the terpene resin is 1:0.5 to 1:0.5.
A water-based pressure-sensitive adhesive consisting of a composition mixed in a ratio of 1:2 and further added with an inorganic filler, a thickener, and an antifoaming agent, and applied to walls for mortar finishing of the walls of structures. In, tetrachloroisophthalonitrile, 2-(4-thiozolyl)benzimidazole, 1,2,4,5,6,7,
8,8-octachlor-4,7-methano-3a,
4,7,7a-tetrahydroindane, 2,4,
6-tribromophenol, nitrates, and quaternary
The active ingredient amount of one or more selected from the group consisting of class ammonium salts is 0.005 to 0.005 to 100 parts by weight of the water-based pressure-sensitive adhesive composition.
When applied to the wall base material of a structure, it has a waterproof function and an adhesion function to both the wall base material and raw mortar, as well as an excellent termite-proofing property for the wall base material. It is characterized by being able to simultaneously fulfill the function of protecting against house mites in one construction process. Further, as the antifoaming agent, one or more selected from polyglycol surfactants, polyether surfactants, and nonionic surfactants are added in an amount of 0.2 to 6 parts by weight per 100 parts by weight of the acrylic resin. It is characterized in that it is blended within a range of 50%. Further, as the thickener, one or more selected from ammonium salts of polymeric organic acids, sodium cellulose glycolate, bentonite, and precipitated calcium carbonate, based on 100 parts by weight of the acrylic resin, It is characterized by being blended in a range of 2 to 20 parts by weight. Further, as the inorganic filler, one or more selected from calcium carbonate, clay, talc, silica, asbestos, barium sulfate, and silica sand is added in an amount of 200 to 600 parts per 100 parts by weight of the acrylic resin.
It is characterized by being blended within a range of parts by weight. An acrylic resin emulsion in which an acrylic resin with a molecular weight of 300,000 or more is dispersed in water with a nonionic surfactant, and a terpene resin emulsion in which a terpene resin with a softening temperature of 100 to 150°C is dispersed in water with a nonionic surfactant are used. To a composition in which the acrylic resin and the terpene resin are mixed in a weight ratio of 1:0.5 to 1:2, 0.2 to 6 parts by weight of an antifoaming agent and a foaming agent are added to 100 parts by weight of the acrylic resin. It is characterized in that it contains 2 to 20 parts by weight and an inorganic filler in a range of 200 to 600 parts by weight. In addition, one or more insect repellents may be added in an active ingredient amount of 0.005 to 100 parts by weight of the water-based pressure-sensitive adhesive composition.
~1.000 parts by weight are mixed. Next, the constituent components of the present invention will be described. The acrylic resin of the present invention is a copolymer having the following structural formula (referred to as basic acrylic resin in the present invention). It also includes a copolymer in which at least one of styrene and vinyl acetate is copolymerized with methacrylic acid ester and acrylic acid ester, which are monomers constituting the above copolymer. The molecular weight of acrylic resin must be 300,000 or more; if the molecular weight is less than 300,000, it will not have sufficient cohesive force and will cause problems when used in water-based pressure-sensitive adhesives because the adhesive force will be low. . In the case of acrylic resins copolymerized with styrene, if the styrene content exceeds 30% by weight, there will be problems with weather resistance.
When used as a water-based pressure-sensitive adhesive, there is a problem with adhesion to green mortar after outdoor exposure. In the case of acrylic resin copolymerized with vinyl acetate, if the content of vinyl acetate exceeds 30% by weight, there will be problems with water resistance, and when used as a water-based pressure-sensitive adhesive, this adhesive layer will not function as a waterproof coating. There is a problem in performing the function. As described above, it is preferable for the acrylic resin of the present invention to have good weather resistance and water resistance, high cohesive force and high film strength, and, since it is a pressure-sensitive adhesive, surface tack. Types of resins used with acrylic resins include coumaron indene resin, tenpenphenol resin, P-tert-butylphenol acetylene resin, phenol formaldehyde resin, petroleum hydrocarbon resin, hydrogenated hydrocarbon resin, rosin derivative, There are terpene resins, but terpene resins are the best because of problems such as weather resistance, heat resistance, water resistance, cost, compatibility with various base materials, and compatibility with acrylic resins. In addition, in terms of the softening temperature of terpene resin, it is estimated that the maximum temperature is around 80℃ because it is used as a base material for mortar, so the softening temperature is 100℃.
is necessary. Further, when a water-based pressure-sensitive adhesive is prepared using a resin having a temperature of 100° C. or lower, the cohesive force of the adhesive layer decreases. When a water-based pressure-sensitive adhesive is prepared using a resin with a softening temperature of 150°C or higher, interfacial peeling occurs between the adhesive layers or between the adhesive layer and the base layer. Considering the above points, a terpene resin having a softening temperature of 100 to 150°C is preferable as the resin for the water-based pressure-sensitive adhesive. Both the acrylic resin and terpene resin of the present invention are used in the form of an emulsion that is water-dispersed with a nonionic surfactant. The concentration of each resin in the acrylic resin emulsion and terpene resin emulsion is appropriately selected depending on the conditions when used as a water-based pressure-sensitive adhesive, and is usually 35 to 55% by weight. is used in an amount of 50% by weight, but the present invention is of course not limited to this. A water-based pressure-sensitive adhesive is prepared by mixing an acrylic resin emulsion and a terpene resin emulsion at a weight ratio of 1:0.5 to 1:2. Furthermore, a water-based pressure-sensitive adhesive in which an antifoaming agent, a thickener, and an inorganic filler are uniformly mixed and dispersed as necessary is also preferable as a water-based pressure-sensitive adhesive. As the surfactant, it is preferable to use a nonionic surfactant in terms of water resistance, dispersibility, compatibility, and viscosity stability. As the nonionic surfactant, polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenol ethers, polyoxyethylene alkyl esters, sorbitan alkyl esters, or polyoxyethylene sorbitan alkyls are used. The amount of surfactant used is 100 parts by weight for 100 parts by weight of acrylic resin or terpene resin.
An appropriate amount of parts by weight or less is used. As the insect repellent, various kinds of chemicals can be used as shown below. For example, oxidative phosphorylation inhibitors include halogenated phenols, nitrophenols, isothiocyanates, 4,5,6,7.tetrachloro-2-trifluoromethylbenzimidazole, and electron transport system inhibitors include nitrosilanes, Carboxin, tributyltin compound, 3-
(2,4-Dichlorophenyl)-1,1-dimethylurea, 4-chloropropioanilide, -SH group or/and -NH ₂ group-containing compounds as inhibitors, tetrachloroisophthalonitrile, tetrachloroisophthalonitrile, Methylthiuram disulfide, dialkyldithiocarbamates, tributyltin compounds, isothiocyanates, copper compounds, arsenic compounds, 10,10'-oxybisphenoxyarsine, 2-benzimidazolecarbamate as a DNA synthesis inhibitor Methyl, 1-(butylcarbamoyl)-2-benzimidazolecarbamate, 1,2-bis-(3-methoxycarbonyl-2-thioureido)benzene, 2-
(4-thiazolyl)benzimidazole, salicylanilides as inhibitors of cytoplasmic membrane function,
class ammonium compounds, aliphatic amines, isothiocyanates, imidazoliniums, borates,
Chelate-forming agents include 8-oxyquinolines and dithiocarbamates, and lipid metabolism inhibitors include clotriazole, which are used alone or in combination of two or more. Among these, preferred are tetrachloroisophthalonitrile, 2-(4-thiozolyl)benzimidazole, 1,2,4,5,
6,7,8,8-octachloro-4,7-methano-3a,4,7,7a-tetrahydroindane,2,
4,6-tribromophenol, borates, quaternary
ammonium salts. These chemicals can be used either by mixing and dispersing them in the basic acrylic resin in advance and then adding other compounding agents, or by mixing and dispersing them after making them into a water-based pressure-sensitive adhesive. does not change. In addition, since the amount of the drug used is small, it is preferable from the viewpoint of dispersion efficiency and the safety and health of the working environment to dissolve or disperse the active ingredient in a solvent or water, and then add and mix it, rather than directly adding the active ingredient. To explain further, in terms of green mortar adhesion, it is necessary to adsorb it on a thickener before use. In general, termites tend to gather on materials that have been attacked by decaying fungi, so the insect repellent effect is
Even one type of insect repellent is effective enough, but
It is more effective to use two or more types in combination in terms of durability and activity. In addition, the amount used is 0.005 parts by weight of the active ingredient per 100 parts by weight of the water-based pressure-sensitive adhesive.
It is preferable to contain up to 1.000 parts by weight. If the amount of the active ingredient is less than 0.005 parts by weight per 100 parts by weight of the water-based pressure-sensitive adhesive, it will not be able to exhibit sufficient effects and will not have sufficient sustainability. Also, conversely
If more than 1,000 parts by weight is used, there is a problem in terms of cost, and it not only unnecessarily worsens the working environment in the manufacturing and application process of water-based pressure-sensitive adhesives, but also has a negative impact on environmental pollution. give. In this case, the antifoaming agent is preferably a non-silicon type rather than being used as an adhesive, and examples include polyglycol type surfactants, polyether type surfactants, and nonionic type surfactants. The amount of antifoaming agent used is usually 0.2 to 6 parts by weight per 100 parts by weight of acrylic resin. Thickeners include ammonium salts of polymeric organic acids, sodium cellulose glycolate, and bentonite. The amount of thickener used is usually acrylic resin.
The amount is 2 to 20 parts by weight per 100 parts by weight. Calcium carbonate, clay,
These include talc, silica, asbestos, barium sulfate, and silica sand. The amount of inorganic filler used is usually 200 to 600 parts by weight per 100 parts by weight of acrylic resin.
By using an inorganic filler, drying can be made faster. That is, although water-based pressure-sensitive adhesives are normally dried at room temperature for a long time, the introduction of a filler makes it possible to dry them at a temperature of 50 to 80°C for a short time. At the same time, water-based pressure-sensitive adhesives form an adhesive layer with few glue gaps even when applied thickly. The water-based pressure-sensitive adhesive obtained by mixing the above materials not only adheres well to green mortar, but also has a long bonding period during which the green mortar is cast after the water-based pressure-sensitive adhesive is applied to the adherend and dries. It has the advantage of not being affected by the period of outdoor exposure before placing the mortar, and after placing the green mortar, the mortar and the adherend are completely integrated, and the adhesive layer forms a waterproof layer with appropriate moisture permeability. Furthermore, it is possible to impart an insect repellent function to the wall base material, omit the insect repellent treatment process for the wall base material, and reduce occupational safety and health problems in the treatment process. The present invention will be explained in detail below using Examples and Comparative Examples. Among the materials and chemicals used in these Examples and Comparative Examples, the following were used unless otherwise specified. For acrylic resin emulsions, the molecular weight of the acrylic resin in the emulsion is then shown in parentheses, and the line below that shows the type of acrylic resin and the type of surfactant used in the emulsion. As the acrylic resin, the emulsion using basic acrylic resin is Acronal 81DP (manufactured by Yuka Vadeishu Co., Ltd., trade name), and the emulsion using acrylic resin copolymerized with styrene is Acronal 295D (manufactured by Yuka Vadeishu Co., Ltd.). (product name)
The emulsion using an acrylic resin copolymerized with vinyl acetate was Ricabond PS-8000A (trade name, manufactured by Chuo Rika Kogyo Co., Ltd.). The concentration of acrylic resin in the acrylic resin emulsion is approximately 50% by weight unless otherwise specified. Terpene resin emulsion indicates the softening temperature of the terpene resin in parentheses below the name, and the chemical structural formula of the resin is as shown in the following formula (). This is a water-dispersed emulsion using a nonionic surfactant, T-130 (manufactured by Yasushi Oil Industries Co., Ltd., trade name). The concentration of terpene resin in the terpene resin emulsion is about 50% by weight unless otherwise specified. The insect repellent is Synthol M-100 (active ingredient: 2-
(4-thiazolyl)-benzimidazole, manufactured by Shinto Paint Co., Ltd., trade name), Fine Side D-75 (active ingredient: tetrachloroisophthalonitrile, manufactured by Tokyo Fine Chemical Co., Ltd., trade name), Fine Wood D
(Active ingredient: Contains 40% chlordane, manufactured by Tokyo Fine Chemical Co., Ltd., trade name). Antifoaming agent is Nopco
NXZ (manufactured by San Nopco Co., Ltd., trade name) was used, and Gelton-50 (manufactured by Shiraishi Kogyo Co., Ltd., trade name) was used as the thickener. Nonionic surfactants include polyoxyethylene monostearate (Nonion S-6, NOF Corporation) as polyoxyethylene alkyl esters.
Polyoxyethylene nonyl phenol ether (Nonion NS-206, manufactured by NOF Corporation, trade name) is a polyoxyethylene alkyl phenol ether, and polyoxyethylene stearyl is a polyoxyethylene alkyl ether. Ether (Nonion S-215, NOF Corporation)
product, product name) are used in the same way. Also, examples,
All amounts used in the comparative examples are expressed in parts by weight. Next, examples and comparative examples will be shown.

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[Front] Scattered emulsion. The concentration of the resin is approximately 50%.

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[Table] The formulations of the above Examples and Comparative Examples were stirred at high speed to obtain a uniform paste-like water-based pressure-sensitive adhesive. The adhesive obtained in this manner was tested according to the following test methods for adhesive strength over time, water-resistant adhesive strength, heat-resistant adhesive strength, moisture permeability, insecticidal test effect against termites, insecticidal test effect against mites, and persistence of insect repellent effect. The following tests were conducted and are listed in Table 1. Test method [1] Adhesive strength over time 1-1 Preparation of specimen A water-based pressure-sensitive adhesive was applied at a rate of 1 kg/m ² to 9 mm thick plywood and gypsum board, and dried indoors overnight. This is then exposed outdoors for a predetermined period of time. After that, green mortar was poured to a thickness of 10 mm and cured indoors for two days, covered with polyethylene film. Thereafter, the polyethylene film was removed, and measurements were taken after curing for 8 days indoors. 1-2 Measurement method Make a cut in the mortar surface so that the sample area is 16 cm ² (4 cm x 4 cm). Next, attach the attachment with epoxy resin glue,
Measure at a tensile speed of 200mm/mm. Three samples shall be used, and the numerical value shall be the average value of the three samples. [2] Water-resistant adhesive strength 2-1 Preparation of specimen Apply a water-based pressure-sensitive adhesive at a rate of 1 kg/m ² to 9 mm thick plywood and plasterboard, and after drying overnight, pour green mortar to a thickness of 10 mm. . After curing the fresh mortar in the same manner as in 1-1, cover the exposed parts of the plywood and plaster board with a low-viscosity type epoxy resin adhesive. After the epoxy resin adhesive has hardened, it is immersed in water at room temperature. At the time of measurement, take it out of the water and measure it 2 hours later. 2-2 Same as measurement method 1-2 [3] Heat-resistant adhesive strength 3-1 Preparation of specimen A water-based pressure-sensitive adhesive was applied to 9 mm thick plywood and plasterboard at a rate of 1 kg/m ² and dried for a day and night. Place mortar to a thickness of 10mm. After curing the fresh mortar in the same manner as in 1-1, it is cured in a constant temperature bath at 80°C. When measuring, take it out from the constant temperature bath.
Measurement is performed after leaving it indoors for 4 hours. 3-2 Measurement method Same as 1-2 [4] Measurement of moisture permeability (according to JIS-Z-0208) 4-1 Preparation of specimen Apply 1 kg/m of water-based pressure-sensitive adhesive to a 5.5 mm thick waterproof plywood board. The sample was coated at a ratio of ² :2 and dried at room temperature for one week. 4-2 Measurement method Cut the specimen to 70 mm diameter and fill an aluminum cup with anhydrous calcium chloride. The sample is then mounted with the adhesive layer facing up and sealed with wax.
Place this in a constant temperature and humidity chamber at 40℃ and humidity 90±10%.
Let it stand for 24 hours and calculate the moisture permeability using the following formula. Moisture permeability (g/ ^m2・24H)=240×m/t・s where s: Moisture permeable area ( ^m2 ) t: Total time of two weighing intervals (h) where the test was conducted m: Test Total increase in mass (mg) during the two weighing intervals conducted The formulation of the mortar used in the above tests [1] to [3] is as follows. Portland cement 100 parts by weight standard Sand 200 〃Water 60 〃Total 360 〃 [5] Insecticidal effect test against house termites and house dust mites Water system at a rate of 1 kg/m ² on the surface of 9 mm thick plywood (7 cm x 7 cm x 0.9 cm) After applying pressure-sensitive adhesive and drying indoors for 7 days, place the plywood in a Petri dish with a diameter of 90 mm and a height of 20 mm, place 50 individuals of each of house dust mites or house dust mites on top, and heat at 28°C. The number of days elapsed and the number of surviving insects were investigated under conditions of ±2°C and 75% humidity, and the mortality rate was calculated from the number of dead insects in the untreated area. Mortality rate (%) = Total number of dead insects over the number of days - Total number of dead insects in untreated area / Number of initial inoculations × 100 [6] Insect repellent effect duration test Surface of 9 mm thick plywood (10 cm x 10 cm x 0.9 cm) A water-based pressure-sensitive adhesive was applied to the surface at a rate of 1 kg/ ^m2 , and after drying indoors for 7 days, the specimen was heated to a temperature of
It was stored in a constant temperature and humidity chamber at 25°C and 75% humidity. A specimen was taken out every day that had passed, and house termites and house dust mites were placed on the specimen for 1 hour, the number of surviving insects was investigated, and the mortality rate was calculated from the number of surviving insects in the untreated area.

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[Table] The following things were found from the above examples and comparative examples. The type of acrylic resin is preferably a basic acrylic resin or an acrylic resin copolymerized with 30% by weight or less of styrene or vinyl acetate. styrene,
If the total content of vinyl acetate or both exceeds 30% by weight, problems will arise in weather resistance and water resistance. In other words, when a water-based pressure-sensitive adhesive is made using an acrylic resin copolymerized with styrene in an amount exceeding 30% by weight, the adhesive strength with green mortar decreases as the outdoor exposure period after the adhesive is applied and dries becomes longer. descend. When a water-based pressure-sensitive adhesive is made using an acrylic resin copolymerized with vinyl acetate in excess of 30% by weight,
Poor water resistance. If the molecular weight of the acrylic resin is less than 300,000, the cohesive force after application of the water-based pressure-sensitive adhesive will be low. There is no problem if the molecular weight is 300,000 or more. When comparing surfactants that disperse acrylic resin in water, nonionic surfactants have better water resistance. When using a cationic surfactant, the dispersibility and compatibility with other formulations and the viscosity stability of water-based pressure-sensitive adhesives are poor, so a nonionic surfactant is considered to be better. When comparing terpene resins and petroleum-based hydrocarbon resins, terpene resins are preferable because they have higher adhesive strength values.
Furthermore, if the softening temperature of the terpene resin is lower than 100°C, the adhesive force value will be low. On the other hand, the softening temperature
If the temperature is higher than 150°C, the adhesive layer after coating and drying of the water-based pressure-sensitive adhesive becomes brittle, causing interfacial peeling between the adhesive layer and mortar. The weight ratio of acrylic resin and terpene resin is 1:
When it is larger than 0.5, interfacial peeling between the base material and adhesive layer occurs. When the weight ratio of acrylic resin and terpene resin is less than 1:2, water resistance and heat resistance are poor. In particular, water resistance shows an extreme decrease. In addition, the influence on the adhesiveness of insect repellents is due to changes in the compounding materials, such as the ratio of styrene and vinyl acetate in the acrylic resin, differences in molecular weight, differences in surfactants, and differences in the softening temperature of terpene resins. There was almost no effect of the difference between the resin and the petroleum-based hydrocarbon resin or the weight ratio of the acrylic resin and the terpene resin, and on the contrary, an improvement trend was observed. Based on the above, acrylic resins are basic acrylic resins, styrene, vinyl acetate, or acrylic resins with a total content of up to 30% by weight, with a molecular weight of 30%.
Preferred is an acrylic resin emulsion in which at least 1,000 yen is dispersed in water using a nonionic surfactant. As the terpene resin, a terpene resin emulsion having a softening temperature of 100 to 150°C and water-dispersed with a nonionic surfactant is preferable. Regarding the insect repellent function, the presence and amount of styrene and vinyl acetate copolymerized in acrylic resin, molecular weight, type of surfactant, softening temperature of terpene resin, difference between terpene resin and petroleum hydrocarbon resin, acrylic resin and terpene It is not affected at all by the weight ratio of the resin, but is affected by the amount of active ingredient contained in the water-based adhesive. In addition, although the medicinal efficacy of one type of insect repellent was sufficient, when one or more types were used in combination, active and long-lasting medicinal efficacy was observed even at low concentrations. The water-based pressure-sensitive adhesive obtained in this way adheres well to green mortar regardless of the curing conditions and curing days after application and drying, and has excellent water resistance, heat resistance, and appropriate moisture permeability. Not only does it form a waterproof layer, but it also acts as an insect repellent for wall base materials.
It has characteristics that help increase the durability of structures. Furthermore, organic or inorganic plywood as an adherend,
It can be used in a wide range of materials such as metal plates, gypsum plates, cement plates, etc., and has the characteristic of imparting not only insect repellent functions but also antiseptic, antifouling, and insect repellent functions to the water-based adhesive layer itself and the wall base material of structures. Therefore, by applying the water-based adhesive of the present invention to the wall base material of a structure, it fulfills the waterproof function, the adhesive function to both the wall base material and raw mortar, and the function of preventing termites and house mites in one step. , which plays a major role in industrial development.

Claims (1)

[Claims] 1. An acrylic resin in which an acrylic resin with a molecular weight of 300,000 or more containing up to 30% by weight of styrene, vinyl acetate, or styrene and vinyl acetate in the form of copolymerization is dispersed in water with a nonionic surfactant. An emulsion and a terpene resin emulsion in which a terpene resin with a softening temperature of 100 to 150°C is dispersed in water using a nonionic surfactant are mixed in a weight ratio of 1:0.5 to 1:2 between the acrylic resin and the terpene resin. mix into range,
In a water-based pressure-sensitive adhesive which is made of a composition further containing an inorganic filler, a thickener, and an antifoaming agent and is applied to a wall surface for mortar finishing of the wall surface of a structure, tetrachloroisophthalonitrile, 2 -(4-
Thiozolyl)benzimidazole, 1,2,4,
5,6,7,8,8-octachloro-4,7-methano-3a,4,7,7a-tetrahydroindane,
2,4,6-tribromophenol, nitrates,
and quaternary ammonium salts, as an active ingredient amount per 100 parts by weight of the water-based pressure-sensitive adhesive composition.
It is a mixture of 0.005 to 1.000 parts by weight, and when applied to the wall base material of a structure, it has a waterproof function and an adhesive function to both the wall base material and raw mortar.
Excellent termite and mite-proofing properties for wall base materials.
A water-based pressure-sensitive adhesive that can be applied in one step.