KR20090072479A - Aqueous adhesive and preparation method thereof - Google Patents

Abstract

Aqueous adhesives comprising acrylic silica hybrid emulsion resins and methods for their preparation are disclosed. The aqueous adhesive has a pH of 6 to 9, 40 to 60% by weight of an acrylic silica hybrid emulsion resin obtained after preparing an acrylic silica hybrid emulsion resin having a glass transition temperature of 40 to 60 ° C, and a film forming agent of 0.2 to 1% by weight. , Pigment 5 to 10% by weight and excess water can be prepared by mixing. The water-based adhesive is an adhesive for short fibers used in manufacturing automobile parts and interior materials, and has excellent adhesiveness, strength, flock processing, and scratch resistance when applied.

Description

Aqueous Adhesive Composition and Method of Preparing the Same

The present invention relates to an aqueous adhesive and a method for producing an aqueous adhesive, and to a method for producing an aqueous adhesive for short fibers and an aqueous adhesive using an acrylic silica hybrid emulsion resin.

Currently, organic solvent-type sealants and adhesives are used as adhesives for short fibers, which are causing problems in terms of environment for workers and end users due to volatile organic compounds released, and changes are being made to aqueous and water-soluble adhesives. In addition, recently used water-based adhesives are acrylic emulsions composed mainly of emulsion polymerization of vinyl monomers, which have advantages in terms of the environment, but have high coating film strength, adhesion to plastic materials, flock processability, and resistance to water. Scratchability and the like do not show more than the physical properties of the organic solvent type adhesives.

Accordingly, it is an object of the present invention to provide an aqueous adhesive comprising an acrylic silica hybrid emulsion resin excellent in coating film strength, plastic body adhesion, and floc workability.

Still another object of the present invention is to provide a method of preparing an aqueous adhesive including the acrylic silica hybrid emulsion resin.

An aqueous adhesive according to an embodiment of the present invention for achieving the above object can be prepared by the following method. In order to prepare the aqueous adhesive, the acrylic silica hybrid emulsion resin may include 40 to 60 parts by weight of water, 45 to 70 parts by weight of acrylic ester monomer, 4 to 9 parts by weight of aromatic vinyl monomer, and 3 to 3 nitrile-containing vinyl monomers. To prepare an emulsion monomer mixture comprising 8 parts by weight, 2.5 to 4.5 parts by weight of surfactant. Subsequently, 100 to 150 parts by weight of the obtained emulsion monomer mixture and 0.4 to 1 part by weight of radical polymerization initiation catalyst are added to 25 to 40 parts by weight of colloidal silica, followed by addition polymerization using a Coasel method to prepare a polymerization reaction product; And then, the pH of the polymerization reactant is adjusted to 6 to 9 to prepare an acrylic silica hybrid emulsion resin. Then, 40 to 60% by weight of the acrylic emulsion resin composition, 0.2 to 1% by weight of the film forming agent, 5 to 10% by weight of the pigment and excess water are mixed. Thus, the aqueous adhesive of the present invention can be produced.

The aqueous adhesive according to an embodiment of the present invention for achieving the above another object is pH 6 to 9, 40 to 60% by weight acrylic silica hybrid emulsion resin, characterized in that the glass transition temperature is 40 to 60 ℃, film forming agent 0.2 to 1 weight percent, pigment 5 to 10 weight percent and excess water.

According to embodiments of the present invention, the acrylic ester monomer is methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, normal butyl methacrylate, isobutyl methacrylate, lauryl methacrylate, ste Aryl methacrylate, butyl acrylate, hydroxybutyl methacrylate. Diethylene glycol dimonomethacrylate, and the like, the aromatic vinyl monomers include styrene, alpha-methylstyrene, trans-beta-methylstyrene, beta-methylstyrene, 4-methylstyrene, and the like. The monomer may include acrylonitrile.

According to embodiments of the present invention, the colloidal silica may have a particle size of 15 to 50nm, and may include ion stable colloidal silica, nonionic stable colloidal silica, and the like.

According to embodiments of the present invention, the surfactant includes sodium dodecylbenzenesulfonate, sodium lauryl sulfate, and the like, and the radical polymerization catalyst may be ammonium persulfate, sodium persulfate, potassium persulfate, water-soluble acetic acid, or the like. Ancestry, redox system and the like.

According to embodiments of the present invention, the step of adjusting the pH of the addition polymerization mixture to 6 to 10 is ammonia water, monoethanolamine, diethanolamine, triethanolamine, 1-amino-2-methylpropane, 2-amino- It may be carried out using a pH adjuster including 2-methylpropane, triethylamine and the like.

The aqueous adhesive comprising the acrylic silica hybrid emulsion resin formed by the method of the present invention is excellent in adhesion and strength, flock processing, scratch resistance, and the like, which is used for manufacturing automotive parts and interior materials. Easy to use as an adhesive for textiles

Hereinafter, an aqueous adhesive including a hybrid emulsion resin and a method of manufacturing the same according to various aspects of the present invention will be described in detail. However, the present invention is not limited to the following embodiments and may be implemented in other forms. The embodiments introduced herein are provided to make the disclosure more complete and to fully convey the spirit and features of the invention to those skilled in the art.

Water-based adhesive

An aqueous adhesive according to an embodiment of the present invention includes an acrylic silica hybrid emulsion resin, a pigment and a film forming agent, and water. It may also further comprise an additive.

Specifically, the aqueous adhesive comprises 40 to 60% by weight of the acrylic silica hybrid emulsion resin, 0.2 to 1% by weight of the film forming agent, 5 to 10% by weight of the pigment and excess water. At this time, the acrylic silica hybrid emulsion resin has a pH of 6 to 9, the glass transition temperature is 40 to 60 ℃.

When the content of the acrylic silica hybrid emulsion resin is less than about 40% by weight based on 100% by weight of the aqueous adhesive, adhesion to the coating is lowered, and when the content of the acrylic silica hybrid emulsion is greater than about 60% by weight, the gloss is increased and economical when applying the final product. It is also not preferable in terms of phosphorus. Thus, the aqueous adhesive preferably comprises 40 to 60 weight percent acrylic silica hybrid emulsion resin.

The pigment is provided to impart color to the paint, and examples of the pigment include organic azo pigments and talc, titanium dioxide and the like as extender pigments. These can be used individually or in mixture. When the content of the pigment is less than about 5% by weight relative to 100% by weight of the aqueous adhesive, the hiding power becomes poor, and when the content of the pigment exceeds about 10% by weight, the adhesion of the dry coating film and the scratch resistance of the final application are poor. Thus, the aqueous adhesive preferably comprises 5 to 10% by weight of pigment.

The film forming agent is used to secure the forming ability and adhesion of the coating film. Examples of the film forming agent include trimethyl pentanediol monoisobutyrate, propylene glycol monooleate, and the like. These may be used alone or in combination. If the amount of the film forming agent is less than about 0.2% by weight relative to 100% by weight of the aqueous adhesive, or if the amount of the film forming agent is more than 5% by weight, the adhesion becomes poor. Therefore, it is preferable to include 0.2 to 5% by weight of the film forming agent with respect to 100% by weight of the aqueous adhesive composition.

The water is used as a solvent for dissolving the viscosity of the aqueous adhesive and the acrylic silica hybrid emulsion resin. That is, the water is not intended to limit the present invention because the water-based adhesive is formed to have the optimum workability and the amount of the water varies depending on the use of the acrylic silica hybrid emulsion resin, pigment and film forming agent.

In addition, the aqueous adhesive may further include additives such as cryoprotectants, antifoams, thickeners, and preservatives. The additives are also intended to ensure that the aqueous adhesive has optimal workability and is not a limiting factor of the present invention.

Method of producing an aqueous adhesive

The aqueous adhesive of the present invention may be prepared by mixing 40 to 60% by weight of acrylic silica hybrid emulsion resin, 0.2 to 1% by weight of a film forming agent, 5 to 10% by weight of pigment and excess water after preparing the acrylic silica hybrid emulsion resin. have. Hereinafter, a method of manufacturing an aqueous adhesive according to an embodiment of the present invention.

First, an acrylic silica hybrid emulsion resin having a pH of 6 to 9 and a glass transition temperature of 40 to 60 ° C. is prepared. The acrylic silica hybrid emulsion resin may be formed by polymerizing an emulsion monomer mixture and colloidal silica in the presence of a surfactant and a radical polymerization initiator catalyst, and then neutralizing it.

In detail, first, an emulsion monomer mixture is prepared. The emulsion monomer mixture is 40 to 60 parts by weight of water, 45 to 70 parts by weight of acrylic ester monomer, 4 to 9 parts by weight of aromatic vinyl monomer, 3 to 8 parts by weight of nitrile-containing vinyl monomer, 2.5 to 4.5 parts by weight of surfactant Include.

If the acrylic ester monomer is less than about 45 parts by weight relative to the total weight of the emulsion monomer mixture, the mechanical properties such as the required hardness is lowered, and when the acrylic acid monomer exceeds about 70 parts by weight, the resin is less reactive in the synthetic process of the resin, so Difficult to synthesize Therefore, the monomer mixture preferably contains 45 to 70 parts by weight of the acrylic ester monomer. Examples of the acrylic ester monomers include methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, normal butyl methacrylate, isobutyl methacrylate, lauryl methacrylate, stearyl methacrylate and butyl acryl. Elate, hydroxybutyl methacrylate, diethylene glycol dimonomethacrylate, etc. are mentioned. These can be used individually or in mixture.

If the aromatic vinyl monomer is less than about 4 parts by weight relative to the total weight of the monomer mixture, it is difficult to obtain a resin having the required adhesion. On the other hand, if it exceeds about 9 parts by weight, there is a problem that the weather resistance is poor when applying the adhesive. Therefore, it is preferable that the said monomer mixture contains 4-9 weight part of aromatic vinylic monomers. Examples of the aromatic vinyl monomers include styrene, α-methylstyrene, trans-β-methylstyrene, β-methylstyrene, 4-methylstyrene, and the like. These can be used individually or in mixture.

The nitrile vinyl monomer is less than about 3 parts by weight relative to the total weight of the emulsion monomer mixture, it is difficult to obtain a resin having the required flexibility. On the other hand, if it exceeds about 8 parts by weight, there is a problem of generating deposits inside the reactor during synthesis of the mixture. Accordingly, the monomer mixture preferably contains 3 to 8 parts by weight of nitrile vinyl monomer. Acrylonitrile may be used as the nitrile vinyl monomer.

Surfactants are not used in view of the required particle size and the viscosity of the resin when used in less than about 2.5 parts by weight or in excess of 4.5 parts by weight relative to the total weight of the emulsified monomer mixture. Therefore, the amount of the surfactant is preferably 2.5 to 4.5 parts by weight. Examples of the surfactant used in the preparation of the emulsified monomer mixture include sodium dodecylbenzenesulfonate, sodium lauryl sulfate, sodium isooctylbenzenesulfonate, ammonium poly oxyalkylene alkenyl ether sulfate, aryl polyalkylene glycol ether sulfate Etc. can be mentioned. These may be used alone or in combination.

Subsequently, 100 to 150 parts by weight of the obtained emulsion monomer mixture and 0.4 to 1 part by weight of the radical polymerization initiator catalyst were added to 25 to 40 parts by weight of the colloidal silica based on the total weight of the polymerization reactant to be obtained, followed by addition polymerization using a Coasel method. Prepare the polymerization reactant.

At this time, when the emulsion monomer mixture is used in less than 100 parts by weight based on the total weight of the polymerization reactant, there is a problem that the adhesiveness is lowered when the adhesive is applied. On the other hand, if it exceeds 150 parts by weight, the reactivity decreases with increasing solid content. Accordingly, the amount of the monomer mixture used is 100 to 150 parts by weight, preferably 110 to 140 parts by weight based on the total weight of the polymerization reactant.

In addition, when the colloidal silica is used in less than 25 parts by weight or in excess of 40 parts by weight based on the total weight of the polymerization reactant, it is not preferable because problems of coating film strength, resin storage ability, and coating film forming ability are deteriorated. Therefore, the amount of the colloidal silica is preferably 25 to 40 parts by weight based on the total weight of the polymerization reactant. The colloidal silica may include an ion stable colloidal silica, a nonionic stable colloidal silica, and the like, and examples thereof include Grace's LUDOX HS (trade name), LUDOX SM (trade name), LUDOX SK (trade name), LUDOX TM (trade name), and LUDOX FM. (Brand name) etc. are mentioned. These can be used individually or in mixture. If the particle size of the colloidal silica is less than about 15 nm, due to the increase in viscosity of the hybrid emulsion resin, it is difficult to synthesize the resin, and if the particle size exceeds about 50 nm, there is a problem that the fouling resistance is lowered. Therefore, the particle size of the colloidal silica preferably has 15 to 50nm.

In addition, when the radical polymerization catalyst is used in an amount less than 0.4 part by weight or in excess of 1.0 part by weight based on the total weight of the polymerization reactant, it is not preferable in view of reactivity and molecular weight control. Therefore, the amount of the radical polymerization initiating catalyst is preferably 0.4 to 1.0 parts by weight based on the total weight of the polymerization reactant. Examples of the radical polymerization initiation catalyst include ammonium persulfate, sodium persulfate, potassium persulfate, water-soluble azo, redox and the like. These can be used individually or in mixture.

Thereafter, the pH of the polymerization reactant is adjusted to 6-9 using a pH adjuster. Examples of the pH regulator include ammonia water, monoethanolamine, diethanolamine, triethanolamine, 1-amino-2-methylpropane, 2-amino-2-methylpropane, triethylamine and the like. These can be used individually or in mixture. When the pH of the acrylic silica hybrid emulsion resin prepared by the above method is less than about 6, when the paint is applied, the storage property of the paint is lowered, and when the pH is above about 9, due to excessive use, the toxicity of the pH regulator is volatilized. May cause environmental pollution. Therefore, it is preferable that the pH of the said acrylic silica hybrid emulsion resin has a range of 6-9. In addition, when the glass transition temperature of the obtained acrylic silica hybrid emulsion resin is less than 40 ℃, there is a problem that the processing surface is not smooth during the flocculation of short fibers when applying the adhesive using the same. On the other hand, if the glass transition temperature exceeds 60 ℃, the film forming ability is poor, causing a crack when applying the adhesive, there is a problem in that an excessive amount of the film forming agent is used to form a uniform adhesive surface and adhesion.

Then, 30 to 60% by weight of the obtained acrylic silica hybrid emulsion resin composition, 0.2 to 5% by weight of a film forming agent and 5 to 10% by weight of pigment and excess water are mixed with respect to 100% by weight of the aqueous adhesive to be obtained. Accordingly, the aqueous adhesive of the present invention can be formed to be used as an adhesive for short fibers used in the manufacture of plastics and interior materials for automobile parts. Here, the detailed description of the components constituting the aqueous adhesive is omitted because it is as described above.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the following examples are provided to illustrate the present invention, and the present invention is not limited to the following examples and may be variously modified and changed. In the following examples, the content means parts by weight.

Aqueous adhesive manufacturers

Example 1

A 2-liter five-necked glass flask was attached with a thermometer, a condenser, a stirrer, a temperature raising device, and a nitrogen input device. Under nitrogen injection, 320 g of colloidal silica (LUDOX TMA, solid content: 34%) was added thereto, and the temperature was increased to 60 ° C. In a separate container, 54 g of deionized water, 6.8 g of sodium laurylsulfonate, and 2.2 g of ammonium persulfate were mixed, added to a flask at 60 ° C, and heated to 80 ° C. 30 g of sodium lauryl sulfonate was dissolved in 495 g of deionized water, and 368 g of methyl methacrylate, 160 g of butyl acrylate, 57.6 g of styrene, 38.4 g of acrylonitrile, and 16 g of methacrylic acid were added thereto, followed by stirring to emulsify. Subsequently, 23.3 g of the prepared emulsion was added to the flask to synthesize seed polymer, and 4.2 g of ammonium persulfate was dissolved in 120 g of deionized water, and emulsion polymerization was performed by dropping the remaining emulsion into the flask uniformly for 4 hours. Ammonia water was added to the synthesized emulsion to adjust the pH of the reaction to 7.5. The nonvolatile content of the emulsion resin thus synthesized was 47%, the viscosity was 250 cps, and the glass transition temperature was 48 ° C. Subsequently, an aqueous adhesive having a composition ratio shown in Table 1 was prepared using the obtained acrylic emulsion resin composition.

Example 2

A 2-liter five-necked glass flask was attached with a thermometer, a condenser, a stirrer, a temperature raising device, and a nitrogen input device. Under nitrogen injection, 320 g of colloidal silica (LUDOX TMA, solid content: 34%) was added thereto, and the temperature was increased to 60 ° C. 54 g of deionized water, 6.8 g of sodium lauryl sulfonate, and 2.2 g of ammonium persulfate were mixed in a separate container, and charged into a flask at 60 ° C. and heated to 80 ° C. 30 g of sodium lauryl sulfonate, dissolved in 495 g of deionized water, 400 g of methyl methacrylate, 128 g of butyl acrylate, 32 g of styrene, 64 g of acrylonitrile, and 16 g of methacrylic acid were added and stirred to emulsify. 23.3 g of the prepared emulsion was added to the flask, and the seed polymer was synthesized, and 4.2 g of ammonium persulfate was dissolved in 120 g of deionized water, and emulsion polymerization was performed by dropping the remaining emulsion into the flask uniformly for 4 hours. Ammonia water was added to the synthesized emulsion to adjust the pH of the reaction to 7.5. The non-volatile content of the emulsion resin thus synthesized is 47%, viscosity is 320 cps, glass transition temperature is 58 ℃. Subsequently, an aqueous adhesive having a composition ratio shown in Table 1 was prepared using the obtained acrylic emulsion resin composition.

Comparative Example 1

A thermometer, a condenser, a stirrer, and a temperature raising device were attached to a 2-liter 5-neck glass flask. 320 g of deionized water, 0.6 g of sodium carbonate, and 6.8 g of sodium lauryl sulfonate were added thereto, and the temperature was increased to 80 ° C. In a separate vessel, 565 g of deionized water, 30 g of sodium laurylsulfonate, 192 g of methyl methacrylate, 240 g of butyl acrylate, 304 g of styrene, and 16 g of methacrylic acid were added and stirred to emulsify. 40.4 g of the prepared emulsion was added to the flask, 4.2 g of ammonium persulfate was dissolved in 50 g of deionized water, added to the reactor to synthesize a seed polymer, and the remaining emulsion was added dropwise to the flask for 4 hours to perform emulsion polymerization. Ammonia water was added to the synthesized emulsion to adjust the pH of the reactants to 9. The non-volatile content of the emulsion resin thus synthesized is 45%, viscosity is 420 cps, glass transition temperature is 32 ℃. Subsequently, an aqueous adhesive having a composition ratio shown in Table 1 was prepared using the obtained acrylic emulsion resin composition.

Comparative Example 2

A 2-liter five-necked glass flask was attached with a thermometer, a condenser, a stirrer, a temperature raising device, and a nitrogen input device. Under nitrogen injection, 560 g of colloidal silica (LUDOX TMA, solid content: 34%) was added thereto, and the temperature was increased to 60 ° C. In a separate container, 54 g of deionized water, 6.8 g of sodium laurylsulfonate, and 2.2 g of ammonium persulfate were mixed, added to a flask at 60 ° C, and heated to 80 ° C. 30 g of sodium lauryl sulfonate was dissolved in 219.2 g of deionized water, and 368 g of methyl methacrylate, 160 g of butyl acrylate, 57.6 g of styrene, 38.4 g of acrylonitrile, and 16 g of methacrylic acid were added to the mixture, followed by emulsification. 17.8 g of the prepared emulsion was added to the flask, and the seed polymer was synthesized, and 4.2 g of ammonium persulfate was dissolved in 120 g of deionized water, and emulsion polymerization was performed by dropping the remaining emulsion into the flask uniformly for 4 hours. Ammonia water was added to the synthesized emulsion to adjust the pH of the reaction to 7.5. The nonvolatile content of the emulsion resin thus synthesized was 52%, the viscosity was 260 cps, and the glass transition temperature was 48 ° C. Then, an aqueous adhesive having a composition ratio shown in Table 1 was prepared using the obtained acrylic emulsion resin composition.

Raw material name Example 1 Example 2 Comparative Example 1 Comparative Example 2 Resin in Example 1 50.0 - - - Resin in Example 2 - 50.0 - - Resin in Comparative Example 1 - - 50.0 Resin in Comparative Example 2 - - 50.0 Deionized water 36.7 36.6 37.0 36.7 Preservative ⁽¹⁾ 0.3 0.3 0.3 0.3 Cryoprotectants ⁽²⁾ 1.0 1.0 1.0 1.0 Titanium dioxide 8.0 8.0 8.0 8.0 Silica 2.0 2.0 2.0 2.0 Repellent ⁽³⁾ 1.5 1.6 1.2 1.5 Thickeners ⁽⁴⁾ 0.2 0.2 0.2 0.2 Antifoam ⁽⁵⁾ 0.3 0.3 0.3 0.3 Sum 100 100 100 100

(week)

(1) Preservative: Sunkyung B-95

(2) Cryoprevents: Propylene Glycol from Dow Chemical

(3) Preparation of film: Texanol of Eastman Chemical Company

(4) Thickener: Rohm & Hass RM-7

(5) Defoamer: TEGO Foamex 810 from degussa., Germany

Characterization of Water-based Adhesives

Physical properties of the aqueous adhesives of Examples 1 and 2 and Comparative Examples 1 and 2 having the composition of Table 1 were measured in the following manner, and the results are shown in Table 2 below.

KU viscosity: maintained at 25 ° C. in aqueous adhesive composition and measured with a Krebs-Stormer viscometer. -Flock processability: After spraying 80 microns to plastic specimens using a spray device, nylon fibers of voltage 35kv, pole 10cm, 1.5 denier, and 0.5mm were implanted using an electric mosquito. After weaving, we grasped the hair condition after baking for 1 hour in 80 ℃ drying furnace and carried out a tactile test. -The adhesion test was carried out by the NCCA-II-20 method.-The scratch resistance was carried out by the nail scratch test.

Test Items Example 1 Example 2 Comparative Example 1 Comparative Example 2 Viscosity (KU) 80 82 80 83 Flock Machinability  Good  Good  Good  Good Hypotability (60 ℃ × 7days) Very good Very good Very good Gelled Cross-cut 100/100 100/100 25/100 100/100 Scratch resistance Very good Very good Defective Very good

As can be seen in Table 2, the water-based adhesives obtained in Examples 1 to 1 have excellent adhesion and scratch resistance due to the firmness and airtightness of the uniformly dispersed silica particles, while being obtained in Comparative Example 1 One aqueous adhesive composition does not contain colloidal silica particles, and thus poor adhesion to the body. The aqueous adhesive obtained in Comparative Example 2 has too much content of colloidal silica and thus poor storage properties of the resin and the adhesive composition.

As described above, the aqueous adhesive including the acrylic silica hybrid emulsion resin formed by the method of the present invention is an adhesive for short fibers used in the manufacture of automotive parts and interior materials. Because of its excellent scratch resistance and the like, it can be applied as an industrial aqueous adhesive.

Claims (9)

preparing an acrylic silica hybrid emulsion resin having a pH of 6 to 9 and a glass transition temperature of 40 to 60 ° C; And 40 to 60% by weight of the acrylic silica hybrid emulsion resin, 0.2 to 1% by weight of the film forming agent, 5 to 10% by weight of the pigment and extra water, The acrylic silica hybrid emulsion resin is 40 to 60 parts by weight of water, 45 to 70 parts by weight of acrylic ester monomer, 4 to 9 parts by weight of aromatic vinyl monomer, 3 to 8 parts by weight of nitrile-containing vinyl monomer, 2.5 to surfactant Preparing an emulsion monomer mixture comprising 4.5 parts by weight; Preparing a polymerization reactant by adding 100 to 150 parts by weight of the obtained emulsion monomer mixture and 0.4 to 1 part by weight of the radical polymerization initiation catalyst to the colloidal silica by addition and polymerization using a Coacell method; And Method for producing an aqueous adhesive, characterized in that the step of titrating the pH of the polymerization reaction to 6 to 9. The method of claim 1, wherein the acrylic ester monomer is methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, normal butyl methacrylate, isobutyl methacrylate, lauryl methacrylate, stearyl methacrylate At least one selected from the group consisting of latex, butyl acrylate, hydroxybutyl methacrylate and diethylene glycol dimonomethacrylate, wherein the aromatic vinyl monomers are styrene, alpha-methylstyrene, and trans-beta-methyl. At least one selected from the group consisting of styrene, beta-methylstyrene and 4-methylstyrene, wherein the nitrile vinyl monomer is acrylonitrile. The method of claim 1, wherein the colloidal silica has a particle size of 15 to 50 nm, and comprises an ion stable colloidal silica, a nonionic stable colloidal silica, or a mixture thereof. The method of claim 1, wherein the surfactant comprises sodium dodecylbenzenesulfonate, sodium lauryl sulfate or a mixture thereof. The method of claim 1, wherein the radical polymerization initiator catalyst is at least one selected from the group consisting of ammonium persulfate, sodium persulfate, potassium persulfate, water-soluble azo and redox. The method of claim 1, wherein the titration of the pH of the addition polymerization mixture to 6 to 9 is ammonia water, monoethanolamine, diethanolamine, triethanolamine, 1-amino-2-methylpropane, 2-amino-2-methyl Process for producing an aqueous adhesive, characterized in that carried out using at least one pH adjuster in the group consisting of propane and triethylamine. The method of claim 1, wherein the film forming agent is trimethyl pentanediol monoisobutyrate, propylene glycol monooleate, or a mixture thereof. The acrylic silica hybrid emulsion resin has a pH of 6 to 9 and an acrylic emulsion resin composition having a glass transition temperature of 40 to 60 ° C. 40 to 60 wt%, a film forming agent 0.2 to 1 wt%, a pigment 5 to 10 wt%, and excess water Aqueous adhesive comprising a. The method according to claim 8, wherein the aqueous adhesive is used as an adhesive for short fibers used in the manufacture of plastics and interior materials for automobile parts.