KR101132367B1 - Composition of emulsion for adhesive and manufacturing method for the same - Google Patents

Abstract

PURPOSE: An emulsion composition for adhesive is provided to have adhesion and strength similar to jointed cement, and excellent stain resistance at the same time, and to be conveniently used by being stored in a cartridge. CONSTITUTION: An emulsion composition comprises an acrylic resin, wax, silica and a non-ionic surfactant. A manufacturing method of the adhesive comprises: a step of forming a suspension by mixing water, acrylic resin, wax and a non-ionic surfactant; a step of mixing a thickener to the suspension; a step of dispersing by putting silica, titanium dioxide, plasticizer and calcium carbonate into the suspension; and a step of dispersing by adding a cold-resisting agent into the mixture formed through the dispersion step.

Description

Emulsion composition for adhesives and method for preparing the same {Composition of emulsion for adhesive and manufacturing method for the same}

The present invention relates to an emulsion composition for adhesives used in tiles and marble and the like and a method for producing the same.

Joint adhesive is a filler that fills a narrow space (about 1 to 20 mm) between tiles or marble. Tiles are used in bathrooms and are always used in high humidity, and frequent exposure to washing and bathing is frequently exposed to various sources of pollution. In addition, marble is installed in places where people have a lot of traffic outdoors, and it is easily polluted, and is often exposed to environmental changes. Thus, joints filling the seams of tiles or marble are also easily contaminated, and their lifetime is also short.

In order to fill the joints of tiles or marbles, water is added to the tile cement as a joint agent currently used in Korea and kneaded. However, if the seam is filled in this way, it will be easily polluted and broken over time.

The problem to be solved by the present invention is to provide an adhesive emulsion composition that is excellent in fouling resistance and can be conveniently used by filling in a cartridge while showing similar adhesive strength and strength as that of a joint cement.

Another object of the present invention is to provide a method for producing an adhesive for joints, which is excellent in stain resistance and excellent in adhesive strength and strength.

Problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

One aspect of the adhesive emulsion composition of the present invention for solving the above problems includes acrylic resins, waxes, silicas and nonionic surfactants.

One aspect of the method for producing an adhesive emulsion of the present invention for solving the other problem is a step of forming a suspension by mixing water, acrylic resin, wax and nonionic surfactant, mixing the thickener in the suspension to increase the viscosity , A dispersion step of dispersing silica, fat sugar and calcium carbonate into the suspension mixed with the thickener, and adding and dispersing a cold-resistant agent to the mixture formed in the dispersion step.

Other specific details of the invention are included in the detailed description and drawings.

Using the adhesive emulsion composition according to the present invention, it is possible to obtain a level of adhesion and strength similar to that used by adding water to the joint cement currently being used, but also shows better fouling resistance than the current joint cement. Therefore, it is economical because the joint cement, which is contaminated over time, can be removed at a certain time and reconstructed. In addition, the present invention provides an adhesive emulsion composition that can be conveniently used by filling a cartridge.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, “comprises” and / or “comprising” refers to the presence of one or more other components, steps, operations and / or elements. Or does not exclude additions.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. In addition, the terms defined in the commonly used dictionaries are not ideally or excessively interpreted unless they are specifically defined clearly.

Hereinafter, the adhesive emulsion composition according to the embodiments of the present invention will be described.

The adhesive emulsion composition may include acrylic resin (A), wax (B), silica (C), nonionic surfactant (D), and water (E). In addition, a thickener, calcium carbonate (CaCO ₃ ), fat sugar (TiO ₂ ), a plasticizer and cold-resistant may further include.

Specifically, acrylic resin (A) may be used, for example, in the form of an acrylic emulsion. The acrylic emulsion may be an emulsion polymer formed by emulsion polymerization of an acrylic monomer, an emulsifier, and a polymerization initiator. In the following description of the adhesive emulsion composition according to the embodiment of the present invention, the acrylic resin comprises an acrylic emulsion. Specifically, the acrylic monomer may be methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, 2-ethyl hexyl methacrylate, and the like, but is not limited thereto.

Acrylic resin is a binder used in order to improve adhesive force. The acrylic resin may be included in an amount of 1 to 50% by weight, and more specifically 4 to 20% by weight, based on the composition. When the acrylic resin is included in the above range, the compatibility with the wax is excellent, the strength of the adhesive is increased to reduce the occurrence of cracks, the adhesion can also be increased. The glass transition temperature (Tg) of the acrylic resin may be -60 ° C to 80 ° C, and more specifically, it is preferable to use an acrylic resin having a glass transition temperature of 10 ° C to 20 ° C. When the acrylic resin has a glass transition temperature in the above range, not only the adhesive strength of the adhesive composition according to one embodiment of the present invention is increased, but also the deformation after adhesion is small and the weather resistance is increased.

Water (E) serves as a solvent to allow the compounds constituting the composition to be mixed. Water may be used in an amount of 1 to 10% by weight based on the composition.

Wax (B) can be used, for example, in the form of a wax emulsion. Waxes, for example, have a gloss, lubricating and waterproofing effect, and wax emulsions are made by mixing the wax with water to form a suspension. Hereinafter, in the description of the adhesive emulsion composition according to the embodiment of the present invention, wax is used as a term including a wax emulsion. When wax is added to the adhesive emulsion composition, the adhesive emulsion composition promotes film formation and curing. In addition, when the adhesive emulsion composition is cured, the wax has a strength against external impact, excellent water repellency, and improves the stain resistance of the adhesive emulsion.

Wax (B) may be included in the composition 1 to 70% by weight, preferably 10 to 50% by weight. When the wax is included in the above range, the adhesion of the composition is increased, the water repellency is excellent, and the stain resistance is improved. In addition, by promoting the curing of the emulsion composition for adhesion, it can be used within a short time after construction. The wax may include, but is not limited to, paraffin wax, polyethylene wax, and the like. The paraffin wax may have a melting point of 50 ° C. to 150 ° C., but preferably 50 ° C. to 70 ° C. The softening temperature of the polyethylene wax may be 80 ° C. to 160 ° C., but preferably 120 ° C. to 140 ° C. When the wax having the above temperature range is included, the composition is excellent in water repellency and stain resistance is improved.

Silica (C) may be included in the adhesive emulsion and used as a filler for reinforcement. Fillers for reinforcement are to prevent the adhesive emulsion from excessive shrinkage and to increase the rigidity of the cured adhesive emulsion. In other words, when the adhesive emulsion is cured, volume contraction is performed to lower the overall energy. Thus, the silica can maintain the adhesion by preventing the adhesive emulsion from being deformed through excessive shrinkage. In addition, even when the external environment is exposed, the cured adhesive emulsion is not easily broken. The average diameter of the silica included in the adhesive emulsion may be from several hundred nm to several hundred um, but preferably the average diameter of the silica may be between 1um and 100um. When the average diameter of the silica is 1um to 100um, when the adhesive emulsion composition is cured, it is excellent in resistance to volume shrinkage. In addition, the silica may be included in the composition 10 to 70% by weight, preferably 10 to 50% by weight. When silica is included in the above range, no cracking occurs after the composition is cured, and also excellent resistance to volume shrinkage.

Surfactant is a substance that dissolves in a liquid and significantly lowers the surface tension. The surfactant is a substance that helps to mix acrylic emulsion, wax emulsion, silica and the like well. The surfactant may preferably be a nonionic surfactant (D). The nonionic surfactant (D) has a high oil absorption, improves shelf life, and improves mechanical stability. The oil absorption amount is a measure of how well two or more substances are not mixed well, and represents the amount of two or more substances per unit weight mixed with each other and the phases are not separated. That is, in the adhesive emulsion composition, the amount of acrylic resin, wax, and silica is uniformly dispersed without agglomeration per unit nonionic surfactant weight. Comparing nonionic surfactants with anionic surfactants, the oil absorption shows at least 10 times. In addition, when the adhesive emulsion using a nonionic surfactant is compared with the adhesive emulsion using an anionic surfactant, even if it is stored for a long time, the change in the degree to which the adhesive emulsion is uniformly mixed is small, and the adhesive emulsion is prepared. In order to achieve this, even in the case of agitation, wear of silica or the like during agitation is reduced, so that mechanical stability can be obtained.

The nonionic surfactant may contain 0.1 to 10% by weight based on the composition. For example, the nonionic surfactant may be, for example, polyethylene glycol octylphenyl ether, but is not limited thereto.

Thickeners may be included to adjust the viscosity of the adhesive emulsion. The thickener may be, for example, an acrylic acid compound. The thickener may be included in an amount of 0.1 to 10 wt% based on the composition, and the amount of the thickener may be selected in consideration of the place of use of the adhesive emulsion.

Calcium carbonate can be used as a filler for reinforcement. Calcium carbonate may be included from 10 to 70% by weight based on the composition. It can be used together with silica as a filler for reinforcing, calcium carbonate is less dissolved in the adhesive emulsion than silica, and water absorption after water absorption is longer than silica. Therefore, the amount of calcium carbonate may be limited.

The land sugar is chemical name titanium dioxide. Lactose is widely used in white paints because it has a large bleeding power and is heat stable. In the adhesive emulsion composition according to an embodiment of the present invention, the composition is used to give a white color, and may be included in an amount of 1 to 20% by weight based on the composition.

The plasticizer is added to the adhesive emulsion composition to lower the elastic modulus and the glass temperature so as to have a moderate flexibility at room temperature and to reduce the melt viscosity to increase the processability. In addition, the plasticizer improves properties such as heat resistance, cold resistance and flame resistance. The plasticizer may be, for example, but not limited to dioctyl phthalate (DOP). The plasticizer may comprise 0.1 to 10% by weight of the composition.

Cold-resistance is a material included in order to improve the cold resistance of the adhesive emulsion composition. When the use temperature of the adhesive emulsion composition is lowered, the adhesive strength of the adhesive emulsion may be lowered, which may cause difficulty in use. By using cold-resistance, it imparts fluidity in use even at low temperatures, promotes post-use curing and improves adhesion. The cold-resistant agent may be, for example, but not limited to, texanol (Texanol, 2,2,4-Trimethyl-1,3-pentanediol Monoisobutyrate). Cold-resistance may be included in the amount of 0.1 to 10% by weight based on the composition.

Hereinafter, a method for preparing an emulsion for adhesion according to an embodiment of the present invention will be described.

Adhesive emulsion production method according to an embodiment of the present invention by mixing the water, acrylic resin, wax and nonionic surfactant to form a uniformly mixed suspension. Thereafter, the thickener is mixed while stirring the mixed suspension to increase the viscosity of the adhesive emulsion. The thickener is mixed with silica, fat sugar, plasticizer and calcium carbonate in a suspension having increased viscosity to give a first dispersion. Thereafter, a second dispersion is included by adding a cold-resistant agent to the mixture made by primary dispersion. The above procedure is only a description according to another adhesive emulsion production method in one embodiment of the present invention, but is not limited thereto, and may be stirred while adding each of the materials included in the adhesive emulsion one by one.

The temperature at which water, acrylic resin, wax and nonionic surfactant are mixed to form a suspension is sufficient as the temperature at which acrylic resin and wax do not solidify, so that the temperature for preparing the adhesive emulsion composition is not limited.

Adhesive emulsion production method according to another embodiment of the present invention by mixing water, acrylic resin, wax and nonionic surfactant to form a uniformly mixed suspension. Subsequently, a thickening agent, silica, a sugar, a plasticizer, a calcium carbonate and a cold-resistant agent may be added simultaneously while stirring the mixed suspension to prepare an adhesive emulsion.

Water, acrylic resins, waxes, and nonionic surfactants serve as solvents for other materials included in the adhesive emulsion, so they must first be mixed to form a suspension, but other materials are additives to improve the properties of the adhesive emulsion. It can be added and stirred once.

Hereinafter, the present invention will be described in more detail with reference to Examples. This is for illustrative purposes only and does not limit the protection scope of the invention by the appended claims.

<Examples 1 to 55>

In the above-described method of the present invention, an emulsion composition for adhesion was prepared by the composition of Table 1 below. The unit of Table 1 below is g.

Acrylic resin Paraffin wax Acrylic resin Paraffin wax Example 1 5 5 Example 29 12 15 Example 2 5 10 Example 30 12 18 Example 3 5 15 Example 31 12 21 Example 4 5 20 Example 32 12 24 Example 5 5 25 Example 33 12 27 Example 6 5 30 Example 34 12 30 Example 7 5 35 Example 35 15 15 Example 8 5 40 Example 36 15 18 Example 9 5 45 Example 37 15 21 Example 10 5 50 Example 38 15 24 Example 11 5 5 Example 39 15 27 Example 12 5 7.5 Example 40 15 30 Example 13 5 10 Example 41 18 18 Example 14 5 12.5 Example 42 18 21 Example 15 5 15 Example 43 18 24 Example 16 5 17.5 Example 44 18 27 Example 17 5 20 Example 45 18 30 Example 18 5 22.5 Example 46 21 21 Example 19 5 25 Example 47 21 24 Example 20 9 9 Example 48 21 27 Example 21 9 12 Example 49 21 30 Example 22 9 15 Example 50 24 24 Example 23 9 18 Example 51 24 27 Example 24 9 21 Example 52 24 30 Example 25 9 24 Example 53 27 27 Example 26 9 27 Example 54 27 30 Example 27 9 30 Example 55 30 30 Example 28 12 12

Evaluation Example 1 Cracks

After curing the adhesive composition for the adhesive of Examples 1 to 50 after the construction, it is shown in Table 2 by observing whether cracks occur after 3 days at room temperature. Cracking was observed visually to see if cracks occurred in the peeling of the tile or in the cured adhesive emulsion.

The joint adhesive currently used is used by adding water to the joint cement. Therefore, since the wax is not included in the joint adhesive currently used, a comparative example that can be compared with the examples is not described.

Paraffin wax One 2 3 4 5 6 7 8 9 10 Acrylic resin 10 U 9 U U 8 U U U 7 U U U U 6 U U U U U 5 U U U U U U 4 U U U U U U radish 3 U U U U U radish radish radish 2 U U U U radish radish radish radish radish One U U U U radish radish radish radish radish radish

When the weight ratio of acrylic resin to paraffin wax is less than 1: 2.5, that is, the paraffin wax weight is less than 2.5 times the weight of the acrylic resin, cracks occur in all the experimental examples. This is because when the adhesive emulsion composition for construction is cured, cracks occur in the joint adhesive, which is not used for a long time, and thus the durability of the adhesive emulsion composition is lowered.

When the weight ratio of acrylic resin to paraffin wax is 1: 2.5, two experimental examples exist in Table 2, and cracks are divided. When the weight of the acrylic resin was 5 and the weight of the paraffin wax was 12.5, cracks occurred in the constructed composition. However, when the acrylic resin was 12 and the paraffin wax was 30, no crack was generated in the constructed composition. Through such experiments, even if the weight ratio of the acrylic resin to the paraffin wax has a constant value, it can be seen that increasing the weight of the paraffin wax does not cause cracks in the constructed composition. In other words, it can be seen that the wax has more influence on the crack generation of the constructed composition than the acrylic resin.

When the weight ratio of acrylic resin to paraffin wax exceeds 1: 2.5, all the experimental examples in Table 2 did not crack. Through this, when preparing the adhesive emulsion composition, it can be seen that if the weight ratio of acrylic resin to wax is made to be greater than 1: 2.5, cracks will not occur in the constructed composition. In Table 2, the weight ratio of acrylic resin to paraffin wax is described up to 1: 10, but judging from the experimental results, the weight ratio of acrylic resin to paraffin wax is not limited to 1: 10, and cracks even if the weight ratio is higher than that. You can expect this not to happen.

Evaluation Example 2 Pollution Resistance Evaluation

Through Examples 1 to 10, fouling resistance of the adhesive emulsion composition for evaluation was evaluated. Table 3 compares the stain resistance according to the dosage of paraffin wax in the emulsion composition for adhesion. For evaluation of Table 3, the weight of the acrylic resin was fixed at 5, and only the amount of paraffin wax was changed.

The stain resistance test method of the emulsion composition for adhesion is as follows. The adhesive emulsion composition is applied to cure. Thereafter, after the 0.5% carbon black solution was prepared, the solution was dropped onto the surface, and was heated at 80 ° C. for 24 hours, washed with water, and then the color difference was measured.

Paraffin Wax Dosage result 5 incongruity 10 Inadequate 15 Good 20 Good 25 Good 30 Good 35 Good 40 Good 45 Good 50 Good

Comparative example result Joint cement + water incongruity

In Table 3, paraffin wax is mixed with the adhesive emulsion composition by 5, and it is hardened by the construction. Subsequently, in a fouling resistance test, contaminants absorbed in the cured composition (carbon black solution) are not discharged out but remain stains. In Table 4, Comparative Example, water was added to the joint cement, and the difference was not shown. Therefore, the experimental results were inadequate.

 Paraffin wax is mixed with the adhesive emulsion composition by 10, and it hardens | cures by a construction. Subsequently, when conducting a fouling resistance test, it was confirmed that the stain (carbon black solution) absorbed in the cured composition was partially discharged and the stain was soft. Therefore, in Table 4, Comparative Example showed better fouling resistance properties than the case where water was added to the joint cement and used as an adhesive, but the results were insufficient.

Paraffin wax is mixed with the adhesive emulsion composition for 15 to 50 or less, and it coats and hardens | cures. Subsequently, when conducting a stain resistance test, it was confirmed that most of the contaminants absorbed in the cured composition (carbon black solution) were discharged outward and stains disappeared. It appears that due to the excellent water repellency of the wax, contaminants (carbon black solutions) were released out of the cured composition. The experimental results show good stain resistance. When paraffin wax is mixed into the emulsion composition for adhesion by a certain weight or more, it may improve fouling resistance. However, the results shown in Table 3 are not absolute experimental results, and by optimizing the ratio of the components added in addition to the paraffin wax emulsion, even if less than 15 paraffin wax may be added to improve the stain resistance of the adhesive emulsion composition.

Although the embodiments of the present invention have been described above, it will be understood by those skilled in the art that the present invention may be implemented in other specific forms without changing the technical spirit or essential features thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

Claims (10)

Acrylic resins;
Wax;
Joint adhesive comprising silica and nonionic surfactant. The method according to claim 1,
The acrylic resin and the wax is a joint adhesive for adding in a ratio of 1: 2.5-1: 10. The method according to claim 1,
The wax is a joint adhesive of one of the paraffin wax and polyethylene wax. The method according to claim 1,
The average adhesive of the silica is 1 to 100 um joint adhesive. The method according to claim 1,
Said nonionic surfactant is octylphenyl-based adhesive for joints. The method according to claim 1,
Include more water,
The wax is a paraffin wax with a melting point of 50-110 ° C.,
The water comprises 1-10% by weight, the acrylic resin is 1-50% by weight, the wax is 1-70% by weight, the silica is 10-70% by weight and the nonionic surfactant comprises 0.1-5% by weight. Joint glue made. The method according to claim 1,
A joint adhesive further comprising at least one of calcium carbonate, fat sugar, plasticizer, and cold-resistant agent and a thickener. The method of claim 7, wherein
The thickener is 0.1-10% by weight, the plasticizer is 0.1-10% by weight, the cold-resistant agent is 0.1-10% by weight, the calcium carbonate is 10-70% by weight and the fat sugar for 1 to 20% by weight glue. Mixing water, acrylic resin, wax and nonionic surfactant to form a suspension;
Mixing a thickener into the suspension;
A dispersion step of dispersing silica, fat sugar, plasticizer and calcium carbonate in the suspension in which the thickener is mixed; And
Method for producing a joint adhesive comprising dispersing by adding a cold-resistant to the mixture formed in the dispersing step. 10. The method of claim 9,
After forming the suspension,
Method for producing a joint adhesive for mixing and dispersing the thickener, silica, fat sugar, calcium carbonate and cold-resistant at the same time.