KR100778230B1 - Water-soluble coating waterproof composition - Google Patents

Abstract

The present invention relates to a water-soluble coating waterproofing agent consisting of a liquid rubberized asphalt emulsion. The present invention is 5 to 20 parts by weight of acrylic monomer, 10 to 40 parts by weight of asphalt, methyl methacrylate 5 to 20 parts by weight, 5 to 40 parts by weight of isopropyl alcohol, ethylene vinyl 5-30 parts by weight of ethylene vinyl acetate and butadiene were added with butyl rubber and tristyrene phenol, followed by triethylamine to neutralize to pH 6-7, It provides a water-soluble coating waterproofing agent consisting of a liquid rubberized asphalt emulsion containing 10 to 40 parts by weight of the synthesized elastomer. Coating waterproofing agent according to the present invention has a strong adhesion to the adherend, excellent elasticity, strength and flexibility, non-toxic and odorless environment-friendly and well with temperature changes, and has the effect of having a strong resistance to ozone or ultraviolet rays.

Architectural, Civil, Waterproof, Coating, Coating

Description

Water-soluble coating waterproofing agent {WATER-SOLUBLE COATING WATERPROOF COMPOSITION}

The present invention relates to a water-soluble coating waterproofing agent, which has a strong adhesion to the adherend, excellent elasticity and flexibility, non-toxic and odorless environment-friendly, withstands temperature changes, and has a strong resistance to ozone or ultraviolet rays. It is about.

In general, a coating film is formed on the surface of concrete, wood, metal, etc. in various industries such as construction, civil engineering, automobile, etc. for the purpose of waterproofing, rust prevention, corrosion prevention, protection, and increasing the surface strength. In particular, the surface of the adherend such as concrete is coated with a coating waterproofing agent on the concrete ground for the purpose of waterproofing, deterioration or deterioration, and protection, or rubber-based waterproof sheet is bonded using an adhesive.

When the rubber-based waterproof sheet is bonded to the concrete ground, as a seam is generated between the waterproof sheets, it is common to spray-coating a liquid coating waterproofing agent mainly on the concrete ground.

Coating waterproofing agents require water resistance as well as durability, weather resistance, elasticity, strength, flexibility and good adhesion to the adherend. After the film is formed, there should be no cracking, lifting, and whitening over time.

Conventionally, a coating film waterproofing agent mainly uses epoxy, urethane, acrylic resin, or asphalt, but it is common that an organic solvent is mixed and mixed as a diluent here.

Korean Patent Registration No. 0445844 discloses a waterproof primer composition comprising a methacryl monomer, an epoxy resin, a volatile solvent, a curing agent, and a curing aid in an appropriate amount.

As set forth in the prior patent, the conventional coating film waterproofing agent is mainly composed of an acrylic resin or a urethane resin having an adhesive force, and a volatile organic solvent (VOC'S) such as acetone, methyl ethyl ketone, toluene, and xylene as a diluent is mixed therein. It is being created.

However, the conventional coating film waterproofing agent is toxic and odor is severe because the volatile organic solvent is used to cause a fatal damage to the human body in the mixing and handling process, it is flammable, there is a problem that requires serious care and environmentally friendly.

In addition, the conventional coating film waterproofing agent has a problem that the adhesive strength to the adherend is poor as well as the strength, elasticity and flexibility, and the durability is poor due to the lack of resistance to temperature changes and ozone and ultraviolet rays.

The present invention has been invented to solve the conventional problems as described above, by appropriately formulating an adhesive component including acrylic and a modified elastomer, thereby providing a strong adhesion to the adherend, excellent strength, elasticity and flexibility Its purpose is to provide a water-soluble coating waterproofing agent that is non-toxic and odorless, environmentally friendly, resistant to temperature changes, and resistant to ozone or ultraviolet rays.

In order to achieve the above object, the present invention is an acrylic monomer of 5 to 20 parts by weight, asphalt (asphalt) 10 to 40 parts by weight, methyl methacrylate (methyl ethyl) 5 to 20 parts by weight, isopropyl alcohol (Isopropyl alcohol) 5 ~ 40 parts by weight, 5 to 30 parts by weight of ethylene vinyl acetate (EVA), and butadiene were added with butyl rubber and tristyrene phenol, and then triethylamine was added to pH 6 ~. It provides a water-soluble coating waterproofing agent consisting of a liquid rubberized asphalt emulsion containing 10 to 40 parts by weight of the elastomer neutralized and synthesized with 7.

At this time, the acrylic monomer, preferably ethyl acrylate (Ethyl acrylate), butyl acrylate (Butyl acrylate) and the like can be used.

In addition, the coating film waterproofing agent according to the present invention is composed of silica (SiO ₂ ), aluminum oxide (Al ₂ O ₃ ), calcium carbonate CaCO ₃ and calcium oxide (CaO) in the liquid rubberized asphalt emulsion to have excellent strength. The inorganic powder selected from the group may be made of one kind or two or more kinds.

Hereinafter, the present invention will be described in more detail.

The coating film waterproofing agent according to the present invention is composed of the liquid rubberized asphalt emulsion described below, or the inorganic rubberized asphalt emulsion further contains an inorganic powder as a strength enhancer and is dispersed.

The liquid rubberized asphalt emulsion has an acrylic monomer, asphalt (asphalt), methyl methacrylate (Methyl methacrylate), isopropyl alcohol (Isopropyl alcohol), ethylene vinyl acetate (EVA) and elasticity of pH 6-7 It is a water-soluble one-component type in which the polymer is mixed and dispersed. If necessary, such liquid rubberized asphalt emulsion may be further mixed with emulsifiers such as alkyl amines, carboxylic acid amides, aminocarboxylates and sodium citrate salts during the mixing and dispersion production processes.

The acrylic monomer is preferably ethyl acrylate (Ethyl acrylate), butyl acrylate (Butyl acrylate) and the like, which is used for the purpose of enhancing the adhesion. Acrylic monomer is contained in 5 to 20 parts by weight of the total 100 parts by weight of the liquid rubberized asphalt emulsion, the adhesive strength may fall or the elasticity and flexibility may fall if out of this range.

Asphalt is in the form of a solid or semi-solid pitch, which is used to give excellent water resistance. Asphalt is contained in an amount of 10 to 40 parts by weight in the total 100 parts by weight of the liquid rubberized asphalt emulsion, it is not waterproof if too little contained outside this range, it is difficult to spray coating if too much contained , Adhesion and surface strength may be degraded.

The methyl methacrylate (Methyl methacrylate) is used for the purpose of improving the surface hardness and strength as well as adhesion, which is preferably contained in 5 to 20 parts by weight in 100 parts by weight of the total liquid rubberized asphalt emulsion.

The isopropyl alcohol is used for storage stability at a low temperature with a solvent, which is preferably contained in an amount of 5 to 40 parts by weight in 100 parts by weight of the total liquid rubberized asphalt emulsion.

The ethylene vinyl acetate (EVA) is used to have excellent flexibility as well as adhesive strength, which is preferably contained in an amount of 5 to 30 parts by weight in 100 parts by weight of the total liquid rubberized asphalt emulsion.

In addition, the elastomer is used to have excellent elasticity and flexibility, which is contained in 10 to 40 parts by weight in 100 parts by weight of the total liquid rubberized asphalt emulsion. In this case, when the elastic polymer is contained in less than 10 parts by weight, the elasticity and flexibility is inferior, and when it is contained in excess of 40 parts by weight, physical properties such as strength may be inferior. The elastomer is a polymer having a network structure in which butadiene, butyl rubber, and tristyrene phenol are polymerized, and it is preferable to have a pH of 6 to 7 so as to be particularly permeable to an adherend such as concrete. Specifically, the elastomer is butyl rubber in butadiene, mixed and stirred at 120 to 125 ° C. for 2 hours to 3 hours, cooled to about 100 ° C., and tristyrene phenol is added thereto. After further mixing and stirring at 110 to 115 ° C. for about 1 hour, the mixture was cooled to about 80 ° C., and then neutralized to pH 6-7 by adding triethylamine (TEA) as a neutralizing agent.

In emulsifying and polymerizing the liquid rubberized asphalt emulsion as described above, the polymerization reaction of the elastomer and the emulsification reaction can be carried out separately, but preferably proceed simultaneously. Specifically, each component, that is, the acrylic monomer constituting the liquid rubberized asphalt emulsion, asphalt (asphalt), methyl methacrylate (Methyl methacrylate), isopropyl alcohol (Isopropyl alcohol), ethylene vinyl acetate (EVA; Ethylene vinyl acetate), butadiene (butadiene), butyl rubber, tristyrene phenol and triethyl amine (TEA) is preferably neutralized and dispersed at the same time.

As described above, the coating waterproofing agent according to the present invention may be made of the above-mentioned liquid rubberized asphalt emulsion, or may be made by further containing an inorganic powder as a strength reinforcing agent in the liquid rubberized asphalt emulsion, wherein the inorganic powder Silver preferably has a particle size of 50 mesh to 400 mesh. The inorganic powder may be selected from silica (SiO ₂ ), aluminum oxide (Al ₂ O ₃ ), calcium carbonate CaCO ₃ ) and calcium oxide (CaO), which is not particularly limited, but the liquid rubberized asphalt emulsion in weight ratio. It can be mixed with 0.2 to 2.0 compared (ie, liquid rubberized asphalt emulsion in weight ratio: inorganic powder = 1: 0.2 to 2.0).

The coating film waterproofing agent according to the present invention can be used in combination with water, and has excellent adhesion in water as well as when there is water in the adherend.

In addition, the coating film waterproofing agent according to the present invention is used for the purpose of waterproofing, rust prevention, corrosion prevention, protection, etc. to the adherends such as concrete, wood, metal. Specifically, various building materials may be coated for the purpose of rust prevention, corrosion prevention, surface protection, etc., or may be coated for the purpose of waterproofing or sectional repair of buildings, reservoirs, tank floors, sewers, roofs, or automobiles. The lower body or the net can be coated for the purpose of noise, vibration, and the like. In this case, spray coating is preferable when coated on concrete ground. In addition, the coating film waterproofing agent according to the present invention is thinly extruded onto a sheet can be used for waterproof sheet and other purposes in construction, civil engineering.

Hereinafter, embodiments of the present invention will be described. The following examples are merely provided to explain the present invention in more detail, whereby the technical scope of the present invention is not limited.

Example 1

First, 150 g of ethyl acrylate, asphalt 325 g, methyl methacrylate 150 g, 280 g isopropyl alcohol, ethylene vinyl acetate (EVA) in a reactor purged with nitrogen gas ) 250g, butadiene (butadien) 150g was mixed, and 120g of butyl rubber was added thereto and stirred at 120 ° C for 2 hours 30 minutes.

After the reactor was cooled to 100 ° C., 70 g of tristyrene phenol was added thereto, stirred at 110 ° C. for 1 hour, and then cooled to 80 ° C., and 80 g of triethylamine (TEA) was added as a neutralizing agent to pH 6 Neutralized to ˜7.

Next, the neutralized reactant was further stirred at 50 rpm for 1 hour and 30 minutes at 150 rpm to obtain a non-toxic, odorless liquid rubberized asphalt emulsion. Thus, using the obtained liquid rubberized asphalt emulsion as a waterproofing specimen of this embodiment, the physical properties such as lifting phenomenon, surface strength, elasticity, adhesive strength and the like were evaluated, and the results are shown in the following [Table 1].

Example 2

Silica (SiO ₂ ) powder and calcium carbonate (CaCO ₃ ) powder were further added in a weight ratio of 1: 0.8: 0.6 to the rubberized asphalt emulsion of the liquid state obtained in Example 1, and the mixture was stirred to be sufficiently dispersed. Thus obtained dispersion was used as a waterproofing specimen of this embodiment to evaluate the physical properties, the results are shown in the following [Table 1].

Comparative Example 1

At present, by applying the asphalt-based waterproofing agent commercially available in this comparative example, the physical properties were evaluated in the same manner as in Example 1, the results are shown in the following [Table 1].

Comparative Example 2

At present, by applying a urethane-based coating waterproofing agent commercially available in this comparative example, the physical properties were evaluated in the same manner as in Example 1, the results are shown in the following [Table 1].

Item Example 1 Example 2 Comparative Example 1 Comparative Example 2 Test Methods Lifting phenomenon none none greatness littleness Note 1 Strength (N / ㎠) 62.1 67.4 54.4 51.2 According to KSF 3211 elasticity(%) 1350 1280 230 840 According to ASTM D412 Adhesive strength (psi) 330 315 147 264 According to ASTM C907 Resistance to temperature changes Strong Strong weakness usually Note 2 Resistance to ozone Strong Strong weakness usually Note 3 UV resistance Strong Strong weakness usually Note 3

In Table 1 above,

Note 1) After the specimen is coated with plywood of about 2 mm, the test is allowed to stand at -10 ° C for 1 day and at 40 ° C for 1 day.The test is repeated three times in succession. Observations were made to evaluate the relatively large spaced specimens as 'large', the smaller spaced specimens as 'small', and the non-lifted specimens as 'nothing'.

Note 2) After the specimens were coated and dried on the plywood to about 2mm, the surface cracks and whitening phenomena were observed by changing the temperature up to 150 ℃ by starting the temperature from -40 ℃ to 10 ℃. At this time, after increasing the temperature by 10 ℃ was maintained for 1 hour. The specimens with relatively severe cracks or whitening were evaluated as 'weak', the smaller specimens were 'normal', and the specimens without cracks or whitening or 'small' were rated as 'strong'.

Note 3) After drying the specimen on the plywood with a thickness of about 2mm, it was put in a closed space, and ozone was injected into the ozone generator (or ultraviolet irradiation), and then left for 3 days. In addition, relatively weak cracks or whitenings were evaluated as 'weak', smaller specimens were 'normal', and no cracks or whitenings were found as 'strong'.

As shown in [Table 1], it can be seen that the embodiment of the present invention is superior in all physical properties than the conventional comparative example, and in particular, the adhesive strength and elasticity are excellent. In addition, it was found that the elasticity was slightly lower than that of Example 1, which did not contain Example 2 containing the inorganic powder, but the strength was excellent.

In addition, it can be seen that the embodiment of the present invention has stronger resistance to temperature change, ozone and ultraviolet rays than the conventional comparative example.

As described above, the coating film waterproofing agent according to the present invention has a strong adhesion to the adherend, excellent elasticity, strength and flexibility, non-toxic and odorless environment-friendly and resistant to temperature changes, strong resistance to ozone or ultraviolet rays Branches are effective.

Claims (2)

In water-soluble coating waterproofing agent, 5-20 parts by weight of acrylic monomer, 10-40 parts by weight of asphalt, methyl methacrylate 5-20 parts by weight, 5-40 parts by weight of isopropyl alcohol, ethylene vinyl acetate 5-30 parts by weight of vinyl acetate, and butadiene was added with butyl rubber and tristyrene phenol, and triethylamine was added to neutralize and synthesized at pH 6-7. A water-soluble coating waterproofing agent comprising a liquid rubberized asphalt emulsion containing 10 to 40 parts by weight of a polymer. The method of claim 1, The acrylic monomer is water-soluble coating waterproofing agent, characterized in that ethyl acrylate (Ethyl acrylate).