KR102473366B1 - Adhesive composition - Google Patents

Abstract

The present invention relates to an adhesive composition, and relates to a composition having excellent physical properties, being environmentally friendly, and having an improved antibacterial effect.
Since the adhesive composition according to the present invention has high reactivity with a compound having an active hydrogen group, low surface tension, and excellent water and oil repellency, it has an effect of extending curing time after mixing. In addition, it is possible to further improve work efficiency by improving antibacterial and deodorizing power.

Description

Adhesive composition {ADHESIVE COMPOSITION}

The present invention relates to an adhesive composition, and relates to a composition having excellent physical properties, being environmentally friendly, and having an improved antibacterial effect.

In general, an epoxy resin is used as the main component of the adhesive composition, and the adhesive can be classified into a one-component type and a two-component type in which two types of a mixture of a main agent and a crosslinking additive are used.

Existing two-component adhesives have a disadvantage in that they are cured and gelled within 20 to 30 minutes, up to 60 minutes after mixing. In addition, it is known that when an epoxy resin is used, it emits volatile organic compounds such as benzene and toluene, which adversely affect the environment and human body. In addition, environmental problems due to volatilization of unreacted monomeric substances inside the adhesive composition are also emerging, and these environmental substances not only cause environmental problems but also cause chronic problems such as skin diseases in the human body.

Efforts are being made to minimize the generation of volatile organic compounds in order to improve these problems.

However, conventionally developed environmentally friendly adhesive compositions have a problem in that, instead of using a solvent, adhesive properties, which are an essential requirement of an adhesive composition, or physical properties are simultaneously deteriorated.

Therefore, it is required to develop an environmentally friendly and human body friendly adhesive composition that does not contain an epoxy resin and a volatile organic solvent.

An object of the present invention is to provide an environmentally friendly and human body friendly adhesive composition.

In order to solve the above problems, the present invention,

In the two-component adhesive composition,

As a main ingredient, 30 to 60 parts by weight of vinyl acetate-ethylene copolymer, 0.1 to 30 parts by weight of water, 0.1 to 1.5 parts by weight of surfactant, 5 to 10 parts by weight of antimony oxide, 5 to 10 parts by weight of zirconium oxide, 3 to 3 parts by weight of sodium silicate 7 parts by weight, 1 to 5 parts by weight of molybdenum disulfide, 1 to 5 parts by weight of a flame retardant and 5 to 10 parts by weight of aluminum hydroxide;

As a crosslinking additive, hexamethylene diisocyanate;

As a plasticizer, one or more of terephthalic acid-based, polypropylene glycol-based, polyethylene glycol-based, glycerin-based, propylene glycol-based, tributyl citrate, and ethylene glycol-based;

As a filler, at least one of calcium carbonate, hard carbon, heavy carbon, clay, diatomaceous earth, and silica fume;

as an antifoaming agent, at least one of mineral oil and polyether siloxane;

As a thixotropic additive, at least one of polyvinyl alcohols, polyvinyl acetates, bentonites, celluloses, and hydroxyethyl cellulose; and

An adhesive composition comprising a bacteriocin as an antibacterial additive is provided.

According to one embodiment, the present invention,

diethyl hexyl cyclohexane-1,4-dicarboxylate as a plasticizer;

calcium carbonate as a filler;

Modified silicone as an antifoaming agent;

A thixotropic additive may include hydroxy ethyl cellulose.

According to one embodiment, the present invention relates to 100 parts by weight of the subject,

0.1 to 20 parts by weight of a crosslinking additive;

1 to 20 parts by weight of a plasticizer;

10 to 70 parts by weight of a filler;

0.1 to 5 parts by weight of an antifoaming agent;

1 to 20 parts by weight of thixotropic additive; and

Antimicrobial additives may include 0.1 to 10 parts by weight.

According to another embodiment of the present invention, in the method for producing a two-component adhesive composition,

As a main ingredient, 30 to 60 parts by weight of vinyl acetate-ethylene copolymer, 0.1 to 30 parts by weight of water, 0.1 to 1.5 parts by weight of surfactant, 5 to 10 parts by weight of antimony oxide, 5 to 10 parts by weight of zirconium oxide, 3 to 3 parts by weight of sodium silicate 7 parts by weight, 1 to 5 parts by weight of molybdenum disulfide, 1 to 5 parts by weight of a flame retardant and 5 to 10 parts by weight of aluminum hydroxide;

As a crosslinking additive, hexamethylene diisocyanate;

As a plasticizer, one or more of terephthalic acid-based, polypropylene glycol-based, polyethylene glycol-based, glycerin-based, propylene glycol-based, and ethylene glycol-based;

As a filler, at least one of calcium carbonate, hard carbon, heavy carbon, clay, diatomaceous earth, and silica fume;

as an antifoaming agent, at least one of mineral oil and polyether siloxane;

As a thixotropic additive, at least one of polyvinyl alcohols, polyvinyl acetates, bentonites, celluloses, and hydroxyethyl cellulose; and

As an antibacterial additive, it provides a method for producing an adhesive composition comprising the step of mixing bacteriocin.

According to one embodiment, the antibacterial additive may include a bacteriocin produced from Enterococcus faecium strain.

According to another embodiment of the present invention, an adhesive sheet comprising the adhesive composition as described above is provided.

Other specific details of implementations according to the present invention are included in the detailed description below.

Since the adhesive composition according to the present invention has high reactivity with a compound having an active hydrogen group, low surface tension, and excellent water and oil repellency, it has an effect of extending curing time after mixing.

Since the present invention can apply various transformations and have various embodiments, specific embodiments will be exemplified and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all conversions, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of related known technologies may obscure the gist of the present invention, the detailed description will be omitted.

Hereinafter, the stripper composition according to the present invention will be described in detail.

The present invention relates to an adhesive composition, and specifically to an adhesive composition having improved curing properties while excluding or minimizing the use of volatile organic solvents.

The present invention is a composition comprising a main agent and a crosslinking additive, and is a water-soluble two-component adhesive composition. The present invention can manufacture an adhesive sheet or adhesive by a method including application and curing steps.

Specifically, the present invention is a two-component adhesive composition,

As a main ingredient, 30 to 60 parts by weight of vinyl acetate-ethylene copolymer, 0.1 to 30 parts by weight of water, 0.1 to 1.5 parts by weight of surfactant, 5 to 10 parts by weight of antimony oxide, 5 to 10 parts by weight of zirconium oxide, 3 to 3 parts by weight of sodium silicate 7 parts by weight, 1 to 5 parts by weight of molybdenum disulfide, 1 to 5 parts by weight of a flame retardant and 5 to 10 parts by weight of aluminum hydroxide;

As a crosslinking additive, hexamethylene diisocyanate;

As a plasticizer, one or more of terephthalic acid-based, polypropylene glycol-based, polyethylene glycol-based, glycerin-based, propylene glycol-based, and ethylene glycol-based;

As a filler, at least one of calcium carbonate, hard carbons, heavy carbons, clays, and diatomaceous earths;

as an antifoaming agent, at least one of mineral oil and polyether siloxane;

As a thixotropic additive, at least one of polyvinyl alcohols, polyvinyl acetates, bentonites, celluloses, and hydroxyethyl cellulose; and

An adhesive composition comprising a bacteriocin as an antibacterial additive is provided.

30 to 60 parts by weight, for example, 35 to 55 parts by weight, for example, 35 to 45 parts by weight of the vinyl acetate-ethylene copolymer, based on 100 parts by weight of the main agent, and the adhesive sheet or adhesive produced by strong cohesive force It can play a role in maintaining the strength of the constant.

Conventionally, an epoxy resin has been used as a main component of an adhesive sheet or adhesive, but when an epoxy resin is used, volatile organic compounds such as benzene and toluene may be released, which may have a harmful effect on the environment and human body. In the present invention, in order to solve these problems, the use of epoxy resin was excluded to solve problems such as environmental problems and human toxicity.

Water is used as the subject solvent. Unlike conventional adhesive sheets or adhesives, the present invention can solve environmental pollution and toxicity problems by using water instead of volatile organic solvents. Water may be included in 0.1 to 30 parts by weight, for example 0.1 to 20 parts by weight, for example 10 to 30 parts by weight, for example 10 to 20 parts by weight, based on 30 to 60 parts by weight of the vinyl acetate-ethylene copolymer. . When the water content in the composition is less than 0.1 parts by weight, it is difficult to sufficiently dissolve the vinyl acetate-ethylene copolymer, etc., and when it exceeds 30 parts by weight, the viscosity of the composition is excessively low, so adhesive properties may be deteriorated. .

The surfactant may play a role of reducing surface tension and improving application properties during mixing of the adhesive composition. The content of the surfactant may include 0.1 to 1.5 parts by weight, for example, 0.1 to 1 part by weight, for example, 0.2 to 0.6 parts by weight, based on 30 to 60 parts by weight of the vinyl acetate-ethylene copolymer.

As the type of surfactant, known nonionic surfactants, anionic surfactants, and the like can be used. For example, in order to effectively reduce surface tension, a gemini-type anionic surfactant containing an alkyl chain of 8 to 14 carbon atoms may be included. In general, two hydrocarbon chains and two ionic groups in one molecule, and one As a compound with a linkage, it is a conventional surfactant such as a very low critical micelle concentration (cmc), high surface tension lowering ability, good solubility in water, very good foaming and emulsifying power, and low Kraft point. It has been reported to have unique properties different from those of Specifically, for example, a Gemini surfactant having 8 to 12 carbon atoms and 8 to 10 carbon atoms may be included.

Genimi surfactants can be synthesized by the reaction of diamines and halogenated alkanes. Specifically, for example, tetramethyl diaminopropane (tetramethyl diaminopropane) and bromo octane (bromo octane) can be prepared by adding and reacting a solvent, then going through a recrystallization step, and then removing impurities and residual solvent. .

Nonionic surfactants are generally surfactants with non-dissociable hydrophilic groups, and in particular, surfactants with polyoxyethylene chains are dissolved by attaching about 2 moles of water molecules to the oxygen of ether at low temperatures. Because it produces larger micelles than ionic surfactants, many oils can be solubilized in the core. In addition, because it has excellent emulsifying power, it dissolves well in oil and water phases. In addition, it is less irritating than anionic surfactants, and protein denaturation, which is an indicator of skin irritation, is small.

Antimony oxide and zirconium oxide serve to improve and supplement the functionality of the vinyl acetate-ethylene copolymer when the present invention is used for flooring and the like, and specifically, can improve the heat resistance of the product. Antimony oxide and zirconium oxide may be included in 5 to 10 parts by weight, for example, 6 to 8 parts by weight, each independently, based on 30 to 60 parts by weight of the vinyl acetate-ethylene copolymer. When the range of antimony oxide or zirconium oxide is less than 5 parts by weight, the effect of improving heat resistance is insignificant, and when it exceeds 10 parts by weight, it is not economical.

Sodium silicate does not cause pollution, is environment-friendly and human-friendly, and has excellent adhesive strength. Based on the solid content, it may be included in 3 to 7 parts by weight, for example, 3 to 5 parts by weight, based on 30 to 60 parts by weight of the vinyl acetate-ethylene copolymer. If the content is less than 3 parts by weight, the degree of improvement in adhesive performance is insignificant, and if it exceeds 7 parts by weight, mixability with other components may deteriorate.

Molybdenum disulfide (MoS2) serves to improve wear resistance. Molybdenum disulfide is found in thin veins in granite and is used as a lubricant component. It has the unique characteristics of a hexagonal crystal structure that is prone to shear like graphite, but its lubricating action is superior to that of graphite. Molybdenum disulfide may be included in an amount of 1 to 5 parts by weight, for example, 1 to 3 parts by weight, based on solid content, based on 30 to 60 parts by weight of the vinyl acetate-ethylene copolymer. When the content of molybdenum disulfide is less than 1 part by weight, it is difficult to effectively improve wear resistance, and when it exceeds 5 parts by weight, adhesive strength may be rather deteriorated. At this time, copper powder may be mixed and used together with molybdenum disulfide.

The flame retardant serves to improve the flame retardancy of the product. The content may be 1 to 5 parts by weight, for example, 2 to 4 parts by weight, based on 30 to 60 parts by weight of the vinyl acetate-ethylene copolymer. When the content of the flame retardant is less than 1 part by weight, the degree of improvement in flame retardancy is insignificant, and when it exceeds 5 parts by weight, it is uneconomical and there is a possibility that the mixing property with other components is deteriorated. As the flame retardant, for example, alum powder can be used. Specifically, for example, potassium alum (potassium aluminum sulfate, KAl(SO4)2·12H2O) can be used and can be obtained from natural alumite. The flame retardant of the present invention may be used, for example, obtained by dissolving alum in water, filtering, heating and cooling, forming irregular crystals, and drying them.

Aluminum hydroxide serves to improve antibacterial properties of products, and may include, for example, Boehmite (AlO(OH)). Boehmite may include at least one of γ-boehmite, α-boehmite, and pseudo-boehmite. γ-boehmite has excellent crystallinity, excellent thermal stability and chemical stability, is structurally neutral, and has excellent antibacterial properties. In addition, γ-boehmite can be produced by a supercritical synthesis method of only water (pure water) and aluminum (Al). The amount of aluminum hydroxide may be 5 to 10 parts by weight, for example 6 to 8 parts by weight, based on 30 to 60 parts by weight of the vinyl acetate-ethylene copolymer. When the content is less than 5 parts by weight, the antibacterial effect is insignificant, and when it exceeds 10 parts by weight, there is a concern that mixing with other components is impaired.

An isocyanate compound can be used as a crosslinking additive. The isocyanate compound has excellent solubility in water, and the crosslinking additive is uniformly mixed with the main material to maintain appropriate viscosity and hardness. Accordingly, the curing time can be adjusted, and workability can be improved by extending the pot life when mixing the main agent and the crosslinking additive. An isocyanate compound may have, for example, two or more isocyanate groups in one molecule in its structure.

Conventional isocyanate compounds known to be used in the art include toluene-diisocyanate (TDI), hydrogenated TDI, trimethyl propane-TDI, triphenyl methane-triisocyanate triisocyanate (TTI), diphenylmethane-4,4-diisocyanate (MDI), hydrogenated MDI, 2,6-diisopropyl phenyl isocyanate, etc. . However, all of the above compounds are known to be toxic substances that exhibit toxicity at high temperatures or when sprayed.

It is preferable to use non-toxic hexamethylene diisocyanate (HDI) as the cross-linking additive of the present invention. The content of the crosslinking additive may be 0.1 to 20 parts by weight, for example 0.1 to 15 parts by weight, for example 0.5 to 10 parts by weight, for example 2 to 15 parts by weight, based on 100 parts by weight of the main agent.

Plasticizers of the present invention may include glycerin-based plasticizers, glycol-based plasticizers, and combinations thereof. For example, it may have non-volatile properties, and the non-volatile plasticizer may include highly volatile components, particularly materials that exhibit minimal evaporation loss, such as less than about 10% under the conditions used to remove water. In general, a volatile component is a substance that exhibits substantial losses due to evaporation under conditions in which water evaporates. Specific examples of the plasticizer include one of terephthalic acid, dipropylene glycol, polypropylene glycol, polyethylene glycol, glycerin, propylene glycol, tributyl citrate and ethylene glycol. may contain more than Further, specifically, for example, diethyl hexyl cyclohexane-1,4-dicarboxylate may be included. The amount of the plasticizer may be included in, for example, 1 to 20 parts by weight, for example, 2 to 10 parts by weight, for example, 1 to 3 parts by weight, based on 100 parts by weight of the main material.

The filler serves to adjust the viscosity of the adhesive, and may include, for example, one or more of calcium carbonate, hard carbon, heavy carbon, clay (including loess), diatomaceous earth, and silica fume, for example, calcium carbonate. . Calcium carbonate may play a role in controlling the viscosity of the adhesive composition and suppressing shrinkage during a curing reaction. The content of the filler may be 10 to 70 parts by weight, for example, 25 to 40 parts by weight, for example, 15 to 45 parts by weight, based on 100 parts by weight of the main material. If the content of the filler is less than 10 parts by weight, the adhesive hardness may be poor because shrinkage does not occur sufficiently during the curing reaction, and if it exceeds 70 parts by weight, the viscosity may increase excessively and productivity may decrease. In the present invention, for example, calcium carbonate may be used as a filler, and various materials such as hard coals and clays may be used as substitute materials thereof, for example, dolomite, talc, or Combinations of these may be used. Specifically, for example, dolomite and talc may be mixed in a weight ratio of 1:1 to improve mechanical properties of the composition. In addition, it can be used in the form of a powder having a particle size of 150 to 200 mesh in order to improve mixing with other components in the composition.

The antifoaming agent of the present invention may include at least one of mineral oil and polyether siloxane, for example, a general purpose mineral oil type or a modified silicone type. The content may include 0.1 to 5 parts by weight, for example, 0.2 to 1 part by weight, based on 100 parts by weight of the main agent.

The thixotropic additive of the present invention may include at least one of polyvinyl alcohols, polyvinyl acetates, bentonites, celluloses, and hydroxyethyl cellulose, and specifically, for example, a modified alkali expandable emulsion thickener (Modified Alkali Swellable Emulsion Thickeners) or hydroxyethyl cellulose. Polyvinyl alcohol (PVA) serves to improve heat resistance, water resistance and adhesiveness of products. The content of the thixotropy additive may include 1 to 20 parts by weight, for example, 5 to 20 parts by weight, for example, 3 to 10 parts by weight, based on 100 parts by weight of the main agent.

Antibacterial additives of the present invention may include bacteriocins.

Bacteriocins may include, for example, those produced from Enterococcus faecium strains. The strain can be isolated from plants as lactic acid bacteria that promote the growth of beneficial bacteria in the intestine, inhibit the growth of harmful bacteria and spoilage bacteria in the intestine, produce antibacterial substances, and enhance immunity. The method for producing bacteriocin can be specifically, for example, cultured for 10 to 40 hours, for example, 20 to 30 hours, and after 5 to 12 hours of fermentation, for example, after 8 to 10 hours, a carbon source is added. Batch cultivation may be included.

The composition of the present invention can improve the deodorizing effect by including an antibacterial additive, and improve the antibacterial effect against strains such as Staphylococcus aureus (S.aureus) and Escherichia coli. The amount of the antimicrobial additive may be included in an amount of 0.1 to 10 parts by weight, for example, 1 to 5 parts by weight, for example, 0.5 to 3 parts by weight, based on 100 parts by weight of the main agent.

According to another embodiment of the present invention, an adhesive sheet comprising the adhesive composition as described above is provided.

According to the adhesive composition prepared by the method described above, toxicity is prevented by minimizing the use of volatile organic solvents, and physical properties such as adhesiveness, heat resistance, and curing properties can be improved at the same time without polluting the environment. . Therefore, it can be easily applied to adhesives, wooden boards such as plywood, inorganic boards such as magnesium boards, and sheets of various plastic materials such as PVC.

Hereinafter, the configuration of the present invention and its effects will be described in more detail through specific examples and comparative examples. However, these examples are for explaining the present invention in more detail, and the scope of the present invention is not limited to these examples.

Example 1: Preparation of adhesive composition

Based on 55 parts by weight of vinyl acetate-ethylene copolymer,

20 parts by weight of water, 0.5 parts by weight of surfactant, 7 parts by weight of antimony oxide, 7 parts by weight of zirconium oxide, 5 parts by weight of sodium silicate, 3 parts by weight of molybdenum disulfide, 3 parts by weight of flame retardant and 7 parts by weight of γ-boehmite as aluminum hydroxide The subject was prepared by mixing. Here, based on 100 parts by weight of the main subject, 8 parts by weight of hexamethylene diisocyanate (HDI) as a crosslinking additive and diethyl hexyl cyclohexane-1,4-dicarboxylate (diethyl hexyl cyclohexane-1,4-dicarboxylate) as a plasticizer 1,4-dicarboxylate, DEHCH, ECO-DEHCH Plasticizer, Hanwha Chemical) 5 parts by weight, calcium carbonate (Omyacarb® 1, Omya) and ocher (e-beneficial ocher GA-325, Gaia ocher) 35 parts by weight as a filler, defoamer An adhesive composition was prepared by mixing 0.3 parts by weight of furnace-modified silicone (SN-Defoamer 399), 2 parts by weight of hydroxyethyl cellulose (alkali swellable associative thickeners, HISOL 501, HANKUK LATICES) as a thixotropic additive, and 10 parts by weight of an antibacterial additive.

As the antibacterial additive, bacteriocin was used. Bacteriocin was prepared by culturing an Enterococcus faecium strain using a 7 L jar fermenter (Korea Fermentor Co. Ltd. Korea) and culturing it using Lactobacili MRS medium (Difco Lab. USA) medium. At this time, the culture condition was maintained at 7.0 by adding ammonium hydroxide while stirring at 30 ° C. and 300 rpm. The working volume of the fermenter was 3 L, and after 9 hours of fermentation, 75 g of glucose was added to feed-batch culture, and fermentation was carried out for a total of 24 hours. After completion of fermentation, the culture medium was centrifuged at 8,500 rpm and 4 ° C for 10 minutes to remove cells, and filtered through a 0.22 μM pore size filter.

Experimental Example 1: Curing time

After applying the composition according to Example 1 to a substrate and exposing it to an environment of room temperature and 40% humidity, the degree of gelling was confirmed. As a result, it was confirmed that the composition did not gel even after 24 hours.

Experimental Example 2: Adhesion Strength

For Example 1, adhesive strength was measured by a method according to Korean Industrial Standards KS F 4715. As a result, it was confirmed that the adhesive strength was 2.0 (N/m2) on the first day, 2.6 (N/m2) on the third day, and 2.4 (N/m2) on the 7th day. Since these results are about 3 times stronger than the 0.8 N/m2, which is the LH Corporation's adhesive strength acceptance criterion, it can be seen that the adhesive strength is excellent. The results of the test request for the adhesion test are summarized in Table 1.

Experimental Example 3: Antibacterial activity

For Example 1, the antibacterial activity was measured according to the antibacterial test method JIS Z 2801 standard. Antibacterial activity was expressed as an antibacterial activity value. The antibacterial activity value is a value evaluated by comparing the number of strains after culturing the strain for a specific time. Specific formulas are shown in Equations 1 and 2.

[Equation 1]

[Equation 2]

Antibacterial activity = Log (the number of bacteria on the general surface reacted for 24 hours) - Log (the number of bacteria on the antibacterial surface that reacted for 24 hours)

Most of JIS Z 2801 comes out as a log value, and when the antibacterial activity value is 1 or more, it means that more than 90% of the strains are killed. In addition, 2 or more means that 99% or more strains are killed, 3 or more means that 99.9% or more strains, 4 or more 99.99% of these strains, and 5 or more means that 99.999% or more strains are killed. The results are shown in Table 2.

Experimental Example 4: Deodorization

Off-flavor evaluation was performed on the composition according to Example 1 using ammonia gas. After measuring the initial concentration, the concentration after 5 minutes was measured to evaluate the deodorization rate. The result confirmed that the deodorizing effect was excellent at 70%.

As described above, it was confirmed that the composition according to the present invention prolongs the time required for the curing reaction, has excellent adhesive properties, and has excellent antibacterial and deodorizing power. Therefore, by applying the present invention, it is possible to efficiently work using an environmentally friendly and human body friendly composition.

Having described specific parts of the present invention in detail above, it is clear that these specific techniques are only preferred embodiments for those skilled in the art, and the scope of the present invention is not limited thereto. do. Those skilled in the art to which the present invention pertains will be able to make various applications and modifications within the scope of the present invention based on the above information. Accordingly, the substantial scope of the present invention will be defined by the appended claims and equivalents thereof.

Claims (6)

In the method for producing a two-component adhesive composition,
As a main ingredient, 30 to 60 parts by weight of vinyl acetate-ethylene copolymer, 0.1 to 30 parts by weight of water, 0.1 to 1.5 parts by weight of surfactant, 5 to 10 parts by weight of antimony oxide, 5 to 10 parts by weight of zirconium oxide, 3 to 3 parts by weight of sodium silicate 7 parts by weight, 1 to 5 parts by weight of molybdenum disulfide, 1 to 5 parts by weight of a flame retardant and 5 to 10 parts by weight of aluminum hydroxide;
As a crosslinking additive, hexamethylene diisocyanate;
As a plasticizer, one or more of terephthalic acid, polypropylene glycol, polyethylene glycol, glycerin, propylene glycol, tributyl citrate and ethylene glycol;
As a filler, at least one of calcium carbonate, hard carbon, heavy carbon, clay, diatomaceous earth, and silica fume;
as an antifoaming agent, at least one of mineral oil and polyether siloxane;
As the thixotropic additive, at least one of polyvinyl alcohol, polyvinyl acetate, bentonite, cellulose, and hydroxyethyl cellulose; and
As an antibacterial additive, including the step of mixing bacteriocin,
The manufacturing method of the antibacterial additive,
Stirring at 300 rpm at 30 ° C. by inoculating the Enterococcus faecium strain into the medium;
maintaining the pH of the culture solution at 7.0 by adding ammonium hydroxide; and
After 5 to 12 hours of fermentation, adding glucose to fed-batch culture; including, and a total fermentation time of 10 to 40 hours in the preparation of antibacterial additives, a method for producing an adhesive composition. According to claim 1,
As a plasticizer, diethyl hexyl cyclohexane-1,4-dicarboxylate;
As a filler, calcium carbonate;
As an antifoaming agent, modified silicone; and
As a thixotropic additive, a method for producing an adhesive composition comprising the step of mixing hydroxyethyl cellulose. The method of claim 1, based on 100 parts by weight of the subject,
0.1 to 20 parts by weight of the crosslinking additive;
1 to 20 parts by weight of the plasticizer;
10 to 70 parts by weight of the filler;
0.1 to 5 parts by weight of the antifoaming agent;
1 to 20 parts by weight of the thixotropic additive; and
A method for producing an adhesive composition comprising the step of mixing 0.1 to 10 parts by weight of the antimicrobial additive. An adhesive composition prepared by the method according to claim 1. delete An adhesive sheet comprising the adhesive composition according to claim 4.