KR100394365B1 - A pressure sensitive adhesives, that was not added emulsifer, and the manufacturing method of it - Google Patents

Abstract

The present invention relates to a pressure-sensitive adhesive that is not added to the emulsifier and to a method for manufacturing the same, and more particularly, the essential oil composition constituting the pressure-sensitive adhesive harmless to the human body and made of environmentally friendly ethyl alcohol or ethyl alcohol and isopropyl alcohol. Soluble sol and water as a solvent to induce alcohol polymerization, it is harmless to human body and environment while maintaining the adhesiveness and water resistance of adhesive prepared by solution polymerization. The present invention relates to a pressure-sensitive adhesive and a method of manufacturing the same, wherein the emulsifier is not added so that the explosive exclusion and the production cost of the pressure-sensitive adhesive can be reduced and the productivity and profitability can be increased.

The pressure-sensitive adhesive without addition of the emulsifier of the present invention is a composition of 2-ethyl hexyl acrylate, butyl acrylate, methyl methacrylate, vinyl acrylate, acrylic acid, azobisisobutyronitrile, 65% ethyl alcohol and isopropyl alcohol It is characterized in that it is prepared by alcohol polymerization using 35% mostolol and water as a solvent.

Description

A pressure sensitive adhesives, that was not added emulsifer, and the manufacturing method of it}

The present invention relates to a pressure-sensitive adhesive that is not added to the emulsifier and to a method for manufacturing the same, and more particularly, the essential oil composition constituting the pressure-sensitive adhesive harmless to the human body and made of environmentally friendly ethyl alcohol or ethyl alcohol and isopropyl alcohol. Soluble sol and water as a solvent to induce alcohol polymerization, it is harmless to human body and environment while maintaining the adhesiveness and water resistance of adhesive prepared by solution polymerization. The present invention relates to a pressure-sensitive adhesive and a method for manufacturing the same, in which an emulsifier is added so that explosive exclusion and cost reduction of the pressure-sensitive adhesive can be reduced and the productivity and profitability can be increased.

In general, the pressure-sensitive adhesive (粘着 劑) refers to a composition that can temporarily adhere between a specific material, and can easily separate the two adhered materials, it is used in many parts of the industry. As an example, in the shoe manufacturing process, an adhesive is used when the sticker work is performed in advance so that the shoe upper and the insole do not fall off before sewing.

In addition, the adhesive is applied to one side of the tape to repair documents, books, etc.In addition to reinforcement, for industrial use for packaging and electrical insulation, as well as for stickers and instant coated paper used for applying the adhesive to one side of paper for memo It is also used in automobile interiors, such as the scope of application of the adhesive is very wide.

Such pressure sensitive adhesives are typically produced by reacting monomers and catalysts using organic solvents harmful to the human body, such as toluene (C ₇ H ₈ ), methanol (CH ₃ OH), and ethyl acetate, as main raw materials.

That is, the conventional pressure-sensitive adhesive is prepared by the method of solution polymerization and emulsion polymerization, in the case of solution polymerization, 35% by weight of toluene, 20% by weight of methanol, and butyl acrylate (butyl acrylate: CH ₂ = CHCOOC ₄ H ₉ ) 30% by weight, methyl methacrylate (CH ₂ = C (CH ₃ ) COOCH ₃ ) 5% by weight, vinyl acetate (CH ₂ = CHOCOCH ₃ ) 5% by weight, acrylic acid (acrylicacid) : 3% by weight of CHCOOH, 2% by weight of acrylamide (CH ₂ = CHCONH ₂ ), and in the case of emulsion polymerization, 28% by weight of butyl acrylate, 5% by weight of methyl methacrylate, 5% by weight of vinyl acetate, 5% by weight of acrylic acid, 1.8% by weight of acrylamide, 0.2% by weight of ammonium persulfate (NH ₄ ) ₂ S ₂ O ₈ ), and 3% by weight of other organic solvents , 2 wt% post-additive, and 50 wt% water.

Thus, the pressure-sensitive adhesive prepared by conventional solution polymerization has a specific gravity of 50% by weight or more of toluene, methanol and ethyl acetate, which are toxic and highly volatile organic solvents. And, due to the toxicity of the organic solvent contained there is a problem that not only pollute the environment, but also cause harmful effects on the human body of the worker.

In addition, the pressure-sensitive adhesive prepared by emulsion polymerization is an aqueous pressure-sensitive adhesive (Republic of Korea Patent Publication No. 1997-42907, 1993-13374) that uses a solvent as water, and reacts an organic solvent with a monomer and a catalyst. It has the advantage, but because it contains a large amount of moisture, not only has to be a separate adhesive device for drying this moisture, but also a significant difference in adhesive strength occurs depending on the type of adhesion, there is a limit to using only aqueous, There is a problem that contains a small amount of harmful organic solvents, defoamers.

That is, in the case of solution polymerization, the continuous film is formed in a uniform solution according to the evaporation of the oily organic solvent, whereas the emulsion polymerization is formed by the drying of an aqueous solvent (water). The composition contains a low molecular weight component that does not help the adhesive performance, and these phenomena are somewhat different depending on the method of forming and forming the coating, but the moisture and water resistance is poor when compared to solution polymerization. It is pointed out.

Therefore, when the pressure-sensitive adhesive is used in a production factory that manufactures shoe products, the adhesive force is remarkably different depending on the type of fabric of the shoe upper, so that the aqueous pressure-sensitive adhesive prepared by emulsion polymerization has a limitation. Used adhesives should be used simultaneously.

In this case, since the mechanical equipment using the pressure-sensitive adhesive prepared by solution polymerization and emulsion polymerization must be provided at the same time, the purpose of improving the original environmental problems cannot be achieved. In order to prepare the reaction, it is necessary to wash off the reactants attached to the inner wall of the reactor, and in this process, a large amount of waste water is generated to contaminate the environment, and the effect of the organic solvent and the post-additive on the lowering of the adhesive force is reduced. There is a problem that can not be obtained to the desired physical properties.

In particular, in recent years, countries have restricted the use of pressure-sensitive adhesives using organic solvents that are harmful to humans, and have restrictions on imports. Therefore, the pressure-sensitive adhesives do not affect environmental pollution, are harmless to humans, and adhesive strength. And the development of pressure-sensitive adhesive that can be replaced by water resistance or more than solution polymerization is urgently required.

The present invention is to meet the above requirements, such as 2-ethyl hexyl acrylate, butyl acrylate, methyl methacrylate, vinyl acrylate, acrylic acid, azobisisobutyronitrile, etc. The composition is prepared by solution polymerization by inducing alcohol polymerization by accommodating the pressure-sensitive adhesive composition according to the use of a composition which is harmless to the human body and is environmentally friendly with ethyl alcohol or ethyl alcohol and isopropyl alcohol. It is harmless to human body and environment while maintaining physical properties such as adhesive strength and water resistance, and it is possible to eliminate explosiveness and reduce manufacturing cost by using inexpensive mosthanol and water compared to organic solvent, thereby increasing productivity and profitability. It is technical problem to make it possible.

In the pressure-sensitive adhesive to which the emulsifier of the present invention is not added, in the pressure-sensitive adhesive containing 2-ethyl hexyl acrylate, butyl acrylate, vinyl acrylate, methyl methacrylate, acrylic acid, azobisisobutyronitrile, the 2-ethyl hexyl Using a composition of acrylate, butyl acrylate, methyl methacrylate, vinyl acrylate, acrylic acid, azobisisobutyronitrile, using a mosstanol and water consisting of 65% ethyl alcohol and 35% isopropyl alcohol as solvents It is characterized by what is manufactured by alcohol polymerization.

Moreover, the adhesive manufacturing method to which the emulsifier of this invention is not added is 28-36 weight% of 2-ethylhexyl acrylate, 17-6 weight% of butyl acrylate, 1.5-2.8 weight% of methyl methacrylate, and vinyl acrylic 30 to 5% by weight of mosstanol consisting of 0.05 to 1.7% by weight, 1.4 to 2.2% by weight of acrylic acid, 0.05 to 0.3% by weight of azobisisobutyronitrile, 65% of ethyl alcohol and 35% of isopropyl alcohol Into the stirrer, the first polymerization reaction step of mixing and obtaining a polymerization reaction product, and the reaction product of the polymerization reaction product obtained in the first polymerization process is introduced into the reaction tank, the temperature of the reaction tank is raised to about 80 ℃ and the initial reaction for 1 hour And a second polymerization reaction step of dropping and mixing the remaining polymerization reactant into the reaction vessel for about 3 hours so that the polymerization reaction is performed again between the reactants and the second polymerization reaction step. Aging process of maintaining the temperature of the reaction tank in a state in which all the reaction mixture is added in the range of 83 ~ 87 ℃ constant for 2 to 4 hours, 65% ethyl alcohol and isopropyl alcohol in the polymerization reaction aged through the aging process 10 to 5% by weight of moistol comprising 35% and 2 to 1% by weight of a solubilizer are added and mixed with each other to induce the coupling of the lipophilic and hydrophilic substances, and the alcohol polymerization reaction process. 10 to 40% by weight of water is added to the polymerization reaction. The mixture is characterized in that it is prepared by a viscosity control process to adjust the viscosity to 20,000 ~ 25,000 CPS / 25 ℃.

1 is a manufacturing process of the pressure-sensitive adhesive is not added according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: first polymerization reaction step 2: second polymerization reaction step

3: aging step 4: alcohol polymerization reaction step

5: viscosity control process

Hereinafter, the configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.

1 is a manufacturing process chart of the pressure-sensitive adhesive according to the present invention, which is not toxic to humans and does not cause environmental pollution ethyl alcohol (CH ₂ CH ₂ OH) or ethyl alcohol and isopropyl alcohol (isopropylalcohol: (CH ₃ ) Emulsifier that is harmless to human body and environment by inducing polymerization by accommodating oily adhesive composition which is insoluble in water by using mosthanol "L" (MOSSTANOL "L") mixed with ₂ CHOH) as a solvent The pressure-sensitive adhesive is not prepared.

That is, as shown in Fig. 1, 28 to 36% by weight of 2-hexyl ethyl acrylate having adhesive properties, 17 to 6% by weight of butyl acrylate having adhesive properties, and methyl methacrylate 1.5 ~ 2.8% by weight, 0.05-1.7% by weight of vinyl acrylate having adhesive properties, 1.4-2.2% by weight of acrylic acid having adhesive properties and reaction activating functions, and azobisisobutyronitrile having a reaction initiating function (catalyst) (Azobisisobutyronitrile: C ₈ H ₁₂ N ₄ ) 0.05 ~ 0.3% by weight, mosthanol 30 ~ 5 consisting of 35% by weight of isopropyl alcohol and 65% by weight of ethyl alcohol having a reaction inducing function and one of aliphatic saturated alcohols The first polymerization reaction step (1) is carried out in which a weight% is added to the reaction tank and mixed evenly to cause a polymerization reaction to obtain a polymerization reaction product.

The reaction mixture of the polymerization reactant obtained in the first polymerization reaction step (1) was introduced into the reaction tank, and the reaction was performed for one hour while the temperature of the reaction vessel was raised to about 80 ° C. A second polymerization reaction step (2) is performed in which the reaction mixture is mixed evenly while dropping for about 3 hours so that the polymerization reaction is performed again between the reactants.

Thereafter, in the state where all the polymerization reactants are added to the reaction tank through the second polymerization reaction step (2), the temperature of the reaction tank is kept constant in the range of 83 to 87 ° C., and the aging step (3) is aged for 2 to 4 hours. Proceed.

And 10 ~ 5% by weight of moistol consisting of 35% by weight of isopropyl alcohol and 65% by weight of ethyl alcohol having a reaction-inducing function to the polymerization reactants aged through the aging process (3), Separation between two substances is induced by incorporating 2 ~ 1% by weight of an amine-based solubilizer in which the hydrogen atom of ammonia (NH ₃ ) is substituted with a hydrocarbon residue alkyl group and evenly mixing to induce the binding of the lipophilic and hydrophilic substances. The alcohol polymerization reaction step (4) is carried out so as not to occur.

The viscosity of 20,000 to 25,000 CPS / 25 ℃ to be used in an optimal state by adding and mixing evenly 10 ~ 40% by weight of water to the polymerization reactant that can function as an adhesive through the alcohol polymerization reaction step (4) By going through the viscosity control step (5) to adjust the production of the pressure-sensitive adhesive is not added.

The pressure-sensitive adhesive according to the present invention prepared by the above process is harmless and environmentally friendly 65% of ethyl alcohol and isopropyl alcohol introduced in the first polymerization reaction step (1) and the alcohol polymerization reaction step (4). The use of 35% mostolol and water as a solvent makes the 2-ethanhexyl acrylate, butyl acrylate and methyl methacrylate lipophilic substances insoluble in water due to chemical interactions. The polymerization of the pressure-sensitive adhesive composition, such as the rate, vinyl acrylate, acrylic acid, azobisisobutyronitrile is to be made of alcohol polymerization.

In this case, when the acrylic acid having the adhesive property and the reaction activating function is added at 1.4 wt% or less, the adhesive strength is lowered and the reactivity is weak, resulting in the generation of unreacted residual monomer. It is most preferable to add in the range of 1.4 to 2.2 wt% by having excessive adhesive strength.

In addition, when a soluble agent that induces the binding of a lipophilic substance and a hydrophilic substance is added at 1 wt% or less, the lipophilic component is separated from the hydrophilic component. When 2 wt% or more of the soluble agent is added, it is water resistant. It is most preferable to inject | pour within 2 to 1 weight% because) drop off and adhesive fall occurs.

In addition, when the content of 2-ethylhexyl acrylate, butyl acrylate, and methyl methacrylate having an adhesive property in an amount of 28% by weight, 6% by weight, or 1.5% by weight or less, respectively, the material becomes hard when the sticker work is performed. When more than 36% by weight, 17% by weight, 2.8% by weight is more than the adhesive strength is lowered 28 to 36% by weight, 17 to 6% by weight, it is most preferably added within the range of 1.5 to 2.8% by weight.

And when the vinyl acrylate having an adhesive property is less than 0.05% by weight, the polymerization degree is low and the viscosity is low, and when it is 1.7% or more, the degree of polymerization is too high and the gel (GEL) phenomenon of the adhesive occurs, which ranges from 0.05 to 1.7% by weight. It is most preferable to inject | pour in.

In addition, when azobisisobutyronitrile, which is a reaction catalyst, is added in an amount of 0.05 wt% or less, the reactivity is weak and residual monomer is generated, resulting in a decrease in viscosity stability. When 0.3 wt% or more is added, a decrease in adhesion due to overpolymerization is shown. Most preferably, it is added within the range of 0.3 wt%.

And when the amount of mosthanol consisting of 65% of ethyl alcohol and 35% of isopropyl alcohol that causes alcohol polymerization is added below 10% by weight, the polymerization of alcohol does not occur. It is most preferable to add in 10 to 40weight% of a range by causing a fall.

In addition, when 40 wt% or more of water causing alcohol polymerization reaction with viscosity control and mosthanol is added, the adhesive force is lost, and when 10 wt% or less is added, 40 ~ 10 wt% of alcohol polymerization does not occur. Most preferably, it is added in the range of%.

When explaining the embodiment of the pressure-sensitive adhesive is not added according to the present invention made of the above composition as follows.

(Example 1)

Azo having 35% by weight of 2-ethylhexyl acrylate, 6% by weight of butyl acrylate, 2.5% by weight of methyl methacrylate, 1.5% by weight of vinyl acrylate, 2.2% by weight of acrylic acid, and a reaction initiating function (catalyst) 0.25% by weight of bisisobutyronitrile and 30% by weight of mostolol consisting of 65% of ethyl alcohol and 35% of isopropyl alcohol are added to a stirrer and mixed to cause a polymerization reaction to obtain a reaction product.

The reaction product obtained in the above process was added to a reaction tank, and the reaction was initially performed for 1 hour while the temperature of the reaction temperature was raised to about 80 ° C., and the reaction product was added dropwise to the reaction vessel for about 3 hours. The mixture is mixed evenly while dropping to allow polymerization to occur again between the reactants.

In the state where all the reactants obtained through the above process were added, the temperature of the reaction tank was kept constant in the range of 83 to 87 ° C., and aged for 2 to 4 hours, followed by mosstanol consisting of 65% ethyl alcohol and 35% isopropyl alcohol. 10% by weight and 0.55% by weight of a solubilizer are added and mixed to induce binding of the lipophilic and hydrophilic materials, and 12% by weight of water is adjusted to adjust the viscosity to 22,000 CPS / 25 ° C for optimum use. This completes the manufacture of the pressure-sensitive adhesive.

(Example 2)

Example 2 below is to vary the mixing ratio of the composition in Example 1. That is, 33 wt% of 2-ethylhexyl acrylate, 17 wt% of butyl acrylate, 1.7 wt% of methyl methacrylate, 1.5 wt% of vinyl acrylate, 1.7 wt% of acrylic acid, and a reaction start function (catalyst) 0.1% by weight of azobisisobutyronitrile having 14% by weight of moistol consisting of 65% of ethyl alcohol and 35% of isopropyl alcohol was added to the stirrer. The polymerization reaction was carried out to obtain a reaction product.

The reaction product obtained in the above process was added to a reaction tank, and the reaction was initially performed for 1 hour while the temperature of the reaction temperature was raised to about 80 ° C., and the reaction product was added dropwise to the reaction vessel for about 3 hours. The mixture is mixed evenly while dropping to allow polymerization to occur again between the reactants.

In the state where all the reactants obtained through the above process were added, the temperature of the reaction tank was kept constant in the range of 83 to 87 ° C., and aged for 2 to 4 hours, followed by mosstanol consisting of 65% ethyl alcohol and 35% isopropyl alcohol. 10% by weight and 1% by weight of a solubilizer are added and mixed to induce binding of lipophilic and hydrophilic materials, and 20% by weight of water is added to adjust the viscosity to 22,000 CPS / 25 ° C for optimum use. This completes the manufacture of the pressure-sensitive adhesive.

(Example 3)

Example 3 below is substituted with styrene (styrene: C ₈ H ₈ ) which is one of aromatic hydrocarbons in place of the vinyl acrylate having an adhesive and cohesive component in Example 1.

That is, it has 35 weight% of 2-ethylhexyl acrylate, 6 weight% of butyl acrylate, 2.5 weight% of methyl methacrylate, 1.5 weight% of styrene, 2.2 weight% of acrylic acid, and reaction start function (catalyst) 0.25% by weight of azobisisobutyronitrile and 30% by weight of mostanol consisting of 65% of ethyl alcohol and 35% of isopropyl alcohol are added to a stirrer and mixed to cause a polymerization reaction to obtain a reaction product.

The reaction product obtained in the above process was added to a reaction tank, and the reaction was initially performed for 1 hour while the temperature of the reaction temperature was raised to about 80 ° C., and the reaction product was added dropwise to the reaction vessel for about 3 hours. The mixture is mixed evenly while dropping to allow polymerization to occur again between the reactants.

In the state where all the reactants obtained through the above process were added, the temperature of the reaction tank was kept constant in the range of 83 to 87 ° C., and aged for 2 to 4 hours, followed by mosstanol consisting of 65% ethyl alcohol and 35% isopropyl alcohol. 10% by weight and 0.55% by weight of a solubilizer are added and mixed to induce binding of the lipophilic and hydrophilic materials, and 12% by weight of water is adjusted to adjust the viscosity to 22,000 CPS / 25 ° C for optimum use. This completes the manufacture of the pressure-sensitive adhesive.

(Example 4)

In Example 4 below, only ethyl alcohol was added instead of mosstanol consisting of 65% ethyl alcohol and 35% isopropyl alcohol in Example 1, 35% by weight of 2-ethylhexyl acrylate, and butyl acrylate 6 Wt%, methyl methacrylate 2.5 wt%, vinyl acrylate 1.5 wt%, acrylic acid 2.2 wt%, azobisisobutyronitrile 0.25 wt% having a reaction initiation function (catalyst), ethyl alcohol 30 wt% % Is added to the stirrer and mixed to give a polymerization reaction to obtain a reaction product.

The reaction product obtained in the above process was added to a reaction tank, and the reaction was initially performed for 1 hour while the temperature of the reaction temperature was raised to about 80 ° C., and the reaction product was added dropwise to the reaction vessel for about 3 hours. The mixture is mixed evenly while dropping to allow polymerization to occur again between the reactants.

In the state where all of the reactants obtained through the above process was added, the temperature of the reaction tank was kept constant in the range of 83 to 87 ° C., and aged for 2 to 4 hours. Then, 10% by weight of ethyl alcohol and 0.55% by weight of a solubilizer were added. By mixing the lipophilic material and the hydrophilic material to induce a combination, and by adjusting the viscosity to 22,000 CPS / 25 ℃ to be used in an optimal state by adding 12% by weight of water to complete the preparation of the pressure-sensitive adhesive.

According to the Korean adhesive standard (KS A 1107) after three days at 40 ~ 50 ℃ by preparing a specimen of the alcohol polymerization adhesive prepared by the embodiment of the present invention, the conventional solution polymerization adhesive, and emulsion polymerization adhesive Test results are shown in Table 1 for each measurement item.

Here, the measuring method of adhesive force is applied to the product and left for 20 minutes at room temperature, and then measured at 25 ° C., and the unit is gf / 25 mm, and the holding force (heat resistance) measuring method is performed using a test specimen of 25 mm × 25 mm size at room temperature. After leaving for 1 minute, the adhesive holding time and creep after 1 hour were measured at 1 kg and 80 ° C. for 1 hour, and the unit was Creep. Mm / hr (at 80 ° C.).

And Ball Tack is measured at NO.1 (Ø: 1 / 32inch) ~ No.32 (Ø / 32inch) at24 ℃, inclination angle: 26 °, at room temperature for 1 hour of toluene washing. J. DOW law.

Table 1

Kinds Viscosity Solid content adhesiveness Holding force (heat resistant) Ball tack Humidity Emulsified Polymeric Adhesive 30,000 60.13 1.500 20 minutes 25 or more 77-85% Solution Polymeric Adhesive 3,600 46.26 2,150 0.1mm creep 21 Alcohol polymerization adhesive 10,000 50.28 2,010 0.1mm creep 21 Coating amount 60㎛ (Dry) Double Side Equipment used SUS 304 plate, Art paper, PET film. L-75 (00518)

As shown in Table 1, the emulsion polymerization pressure-sensitive adhesive using water as a solvent has low adhesive strength, whereas the alcohol polymerization pressure-sensitive adhesive prepared by the present invention has the same adhesive strength and holding strength as the conventional solution polymerization pressure-sensitive adhesive. .

As described above, the present invention uses a pressure-sensitive adhesive composition such as 2-ethyl hexyl acrylate, butyl acrylate, methyl methacrylate, vinyl acrylate, acrylic acid, azobisisobutyronitrile, etc., which are essential oil-based compositions constituting the pressure-sensitive adhesive. The adhesive and water resistance of the pressure-sensitive adhesive prepared by solution polymerization by inducing alcohol polymerization by accommodating the pressure-sensitive adhesive composition by using water as a solvent and using mosethanol and water, which are harmless and environmentally friendly, ethyl alcohol and isopropyl alcohol. It is harmless to human body and environment while maintaining physical properties, and it is possible to eliminate explosiveness and reduce manufacturing cost when reacting with low-cost mosthanol and water compared to organic solvent, which can increase productivity and profitability. It is.

Claims (5)

( delete ) In the pressure-sensitive adhesive containing 2-ethyl hexyl acrylate, butyl acrylate, methyl methacrylate, vinyl acrylate, acrylic acid, azobisisobutyronitrile composition, 28-36 weight% of said 2-ethylhexyl acrylates, 17-6 weight% of butyl acrylates, 1.5-2.8 weight% of methyl methacrylates, 0.05-1.7 weight% of vinyl acrylates, 1.4-2.2 weights of acrylic acid %, Azobisisobutyronitrile 0.05 to 0.3% by weight, 2 to 1% by weight solubilizer, 40 to 10% by weight of mosthanol consisting of 65% ethyl alcohol and 35% isopropyl alcohol, and 10 to water The pressure-sensitive adhesive is not added, characterized in that consisting of 40% by weight. In the pressure-sensitive adhesive containing 2-ethylhexyl acrylate, butyl acrylate, methyl methacrylate, vinyl acrylate, acrylic acid, azobisisobutyronitrile composition, 28-36 weight% of said 2-ethylhexyl acrylates, 17-6 weight% of butyl acrylates, 1.5-2.8 weight% of methyl methacrylates, 0.05-1.7 weight% of vinyl acrylates, 1.4-2.2 weights of acrylic acid %, Azobisisobutyronitrile 0.05 to 0.3% by weight, 2 to 1% by weight solubilizer, 40 to 10% by weight ethyl alcohol, 10 to 40% by weight of water is not added Do not have adhesive. In the pressure-sensitive adhesive containing 2-ethylhexyl acrylate, butyl acrylate, methyl methacrylate, vinyl acrylate, acrylic acid, azobisisobutyronitrile composition, 28-36 weight% of said 2-ethylhexyl acrylate, 17-6 weight% of butyl acrylate, 1.5-2.8 weight% of methyl methacrylate, 0.05-1.7 weight% of styrene, 1.4-2.2 weight% of acrylic acid, , 40 to 10% by weight of azobisisobutyronitrile, 0.05 to 0.3% by weight, 2 to 1% by weight of a solubilizer, 65% of ethyl alcohol and 35% of isopropyl alcohol, and 10 to 40% by weight of water Pressure-sensitive adhesive, characterized in that consisting of%. In the pressure-sensitive adhesive production method comprising 2-ethyl hexyl acrylate, butyl acrylate, methyl methacrylate, vinyl acrylate, acrylic acid, azobisisobutyronitrile composition, 28-36 weight% of said 2-ethylhexyl acrylates, 17-6 weight% of butyl acrylates, 1.5-2.8 weight% of methyl methacrylates, 0.05-1.7 weight% of vinyl acrylates, 1.4-2.2 weights of acrylic acid %, 30 to 5% by weight of azobisisobutyronitrile and 0.05 to 0.3% by weight of mostolol comprising 65% of ethyl alcohol and 35% of isopropyl alcohol are mixed in a stirrer to obtain a polymerization reaction. Reaction step (1), ⅓ of the polymerization reactant obtained in the first polymerization process (1) was added to the reaction tank, the temperature of the reaction tank was raised to about 80 ° C. for initial reaction for 1 hour, and ⅔ of the remaining polymerization reactant was reacted in the reaction tank for about 3 hours. A second polymerization reaction step (2), in which the polymerization reaction is performed again between the reactants by dropping and mixing over a period of time; Aging step (3) to maintain a constant temperature of the reaction tank in the range 83 ~ 87 ℃ in the state in which all the polymerization reactants are added to the reaction tank through the second polymerization reaction step (2) for 2 to 4 hours, and 10-5% by weight of moistol consisting of 65% ethyl alcohol and 35% isopropyl alcohol and 2-1% by weight of a solubilizer are added to the polymerization reaction aged through the aging process (3). Alcohol polymerization reaction process (4) to induce the binding of the hydrophilic substance, Emulsifier, characterized in that prepared by the viscosity control step (5) to adjust the viscosity to 20,000 ~ 25,000 CPS / 25 ℃ by mixing 10 ~ 40% by weight of water to the polymerization reaction product after the alcohol polymerization reaction step (4). The pressure-sensitive adhesive manufacturing method is not added.