KR19980076355A - Silicone emulsion for waterproof concrete sealing and waterproof construction method using the same - Google Patents

Abstract

The present invention is a silicone emulsion containing 100 parts by weight of silane represented by the following formula 1, 2 to 20 parts by weight of colloidal silica, 2 to 40 parts by weight of emulsifier, 80 to 150 parts by weight of alcohol on the surface of the concrete or mortar of the waterproof layer The present invention relates to waterproofing concrete by forming a waterproofing sealing layer (Sealing layer) inside the surface of the mother, and forming a waterproofing layer by cement-based compound on the surface of the concrete, the waterproofing sealing layer is formed.

[Equation 1]

(Wherein R is a hydrocarboxyl group having 2 to 17 carbon atoms, R 'is a hydrolyzable group and n is 1 or 2)

According to this method, the silicone emulsion sprayed and applied to the surface of concrete or mortar penetrates inside to form a waterproof sealing layer. When the cement compound is applied thereon, even if the surface of the waterproof layer is not sufficiently dried or the smoothness is poor. Poor construction, that is, adhesion failure between the waterproof layers does not occur, as well as the waterproof construction method is simple, it can be easily waterproof construction with a small number of people.

Description

Silicone emulsion for waterproof waterproofing of concrete and waterproof construction method using the same

The present invention relates to a silicone emulsion for concrete waterproof sealing and a method for waterproofing concrete using the same, and more specifically, to the inside of a concrete matrix surface such as a basement floor, a rooftop, a veranda, a bathroom, a swimming pool, a water tank reservoir, a wastewater treatment plant, etc. It relates to a method of waterproofing concrete by forming a waterproof sealing layer (Sealing layer) in.

Waterproofing method of concrete or mortar can be classified into dry method and wet method. On the other hand, the dry method is a method of applying urethane, sheet, asphalt, etc. to the surface of concrete or mortar. If the cleaning condition, smoothness, and dry condition of the waterproofed concrete or mortar surface are poor, the concrete or mortar surface and the waterproof layer after waterproofing Poor phenomena due to the poor adhesion of the, and the durability is weak when there is a problem that is easily aging when installed outdoors.

In addition, the wet method includes cement liquid waterproofing, mortar waterproofing, water-soluble resin or rubber emulsion coating waterproofing, but it has a lot of poor adhesion at the interface after construction, and the water channel is formed at the surface of the waterproofing layer and the waterproofing layer due to the exponential defect of the waterproofing layer. Not only has the disadvantage of rapidly corroding the waterproofing layer as the water moves through the interface, it is difficult to find the source of the leak, and the repair and construction also has a very difficult disadvantage.

The present invention is to solve such a conventional problem, the object of the present invention is to provide a silicone emulsion which is easy to waterproof construction and penetrates into the interior of the surface of the mortar or concrete that is the waterproof layer to form a waterproof sealing layer. .

In addition, another object of the present invention to provide a waterproof sealing construction method of concrete using the silicone emulsion.

1 is a cross-sectional view showing a waterproof structure of the concrete according to the present invention.

Explanation of symbols on the main parts of the drawings

10: concrete matrix 12: waterproof sealing layer

20: coating waterproof layer

Silicone emulsion for waterproofing concrete seals for achieving the object of the present invention, 100 parts by weight of the silane represented by the following formula 1, 5 to 10 parts by weight of colloidal silica, 2 to 40 parts by weight of emulsifier, 80 to 150 parts by weight of alcohol It is characterized by including wealth.

[Equation 1]

In Formula 1, R is a hydrocarboxyl group having 2 to 17 carbon atoms, R 'is a hydrolyzable group, and n is 1 or 2.

In the present invention, as the silane, ethyltriethoxysilane, ethyltrimethoxysilane, ethyltri-n-propoxysilane, propyltriethoxysilane, propyltridimethylaminosilane, butyltriethoxysilane, and butyltrimethoxy Silane, isobutylethoxysilane, isobutyltrimethoxysilane, isobutyltriacetoxysilane, n-hexyltrimethoxysilane, 6-chlorotriethoxysilane, cyclohexyltriethoxysilane, benzyltriethoxysilane , Phenyltriethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, octyltriethoxysilane, octylmethyldiisopropoxysilane, lauryltrimethoxysilane, 2-ethylhexyltrimethoxysilane, decyl Triethoxysilane, dodecyltribromosilane, tetradecyltrimethoxysilane, hexadecyltriethoxysilane, octadecyltriethoxysilane, dimers and trimers thereof, and oligomers thereof are mixed and used. . It is preferable to use the thing whose molecular weight of a silane monomer is 150-450 preferably.

Colloidal silica is used having a pH of 8 to 11, it is particularly preferable to use a silica sol having a content of SiO ₂ 2-20%. Commercially available alternatives include Nalco Chemical's Nalcock 1115, Niacol's Nyacol 215, Nissan Chemical's Snowtex 20, and Monsanto's Seaton W 15.

Emulsifiers are nonionic emulsifiers such as polyoxypropylene manitol dioleate, polyoxyethylene sorbitol oleate, polyoxyethylene monooleate, polyoxyethylene stearate, sorbitan monostearate, sorbitan monooleate, glycerol monostea Sorbitan fatty acid esters such as latex, polyoxyethylene sorbitol hexastearate, sorbitan tristearate, sorbitan trioleate, fatty acid glycerides, polyoxyethylene alcohols and polyoxyethylene sorbitan fatty acid esters Use at least one kind.

Such emulsifiers may be selected according to the type of silane, and usually 2 to 40 parts by weight, preferably 10 to 30 parts by weight based on 100 parts by weight of silane. In particular, the emulsifier may be more preferably used together or mixed with a polyhydroxy compound.

Alcohols are methanol, ethanol, n-butanol, isopropanol, 2-ethoxyethanol, t-butanol, 2-ethylhexanol, isoamyl alcohol, n-octyl alcohol, 2-ethylbutanol, n-hexanol, 2-amyl Alcohol, cyclohexanol, n-propanol, benzyl alcohol is selected and used. In particular, it is preferable to use those having strong hydrogen bonding strength and having solubility parameter values of 9 to 16.

In addition, water may be used as rain water, tap water, distilled water, etc., in particular, it is preferable to use distilled water because the storage stability of the silicone emulsion is easily lowered by impurities contained in the water.

Using the silicone emulsion described above, a method for waterproofing concrete or mortar as a waterproof layer will be described in detail.

That is, the waterproof construction method of the concrete using a silicone emulsion, the step of forming a waterproof sealing layer (Sealing layer) using the silicone emulsion of the present invention inside the surface of the concrete or mortar that is the waterproof layer, and the concrete with a waterproof sealing layer It is characterized in that it comprises the step of forming a waterproof coating layer by applying a cement compound on the surface of the.

In the above cement compound, the water is mixed with an acrylic emulsion alone or mixed with rubber latex at a weight ratio of 1: 0.1-5, and stirring and mixing the sawo seal (trade name, Soro Systems Co., Ltd.) at a ratio of 5-50: 100 parts by weight. It is made by adding a certain amount, or by using an acrylic emulsion alone or a mixture of rubber latex with a weight ratio of 1: 0.1 to 5, and by adding a certain amount of water while mixing and stirring Portland cement or lime in a ratio of 10 to 30: 100 parts by weight. use.

In the waterproof construction method of the present invention, the silicone emulsion penetrates into the concrete or mortar to dry and forms a network structure bond between the pores in the concrete matrix to discharge the remaining moisture to the outside, but from the outside It provides a membrane function to block water from entering. When the waterproof sealing layer is formed, it is excellent in resistance to acid rain, salt, various chemicals, air pollution gas, ozone, etc., and can fundamentally prevent corrosion and weathering of the mother body itself.

Cement compound is composed of cement, slaked lime, plasticizer, acrylic emulsion as an adhesive agent, water-soluble rubber emulsion as an emulsifier, etc., and it has excellent adhesion performance with concrete matrix surface as adherend and firmly bonds with uneven surface pores of the mother surface. The role is to give. In addition, the amount of acrylic emulsion and water-soluble rubber emulsion may be adjusted to form a highly elastic inorganic coating waterproof layer on the surface of the concrete matrix.

More simply, products processed by mixing cement, slaked lime, plasticizer, and surfactant are commercially available, and a typical product is Soror Seal (product of Sor Systems). Therefore, the cement compound may be arbitrarily selected and applied to each compounding agent and its amount so as to meet the requirements of the waterproof surface to be constructed and the overall structural characteristics of the building. It is preferable to mix and use 25 kg of sawo seals, 2 kgs of acrylic emulsions, 2 kgs of water-soluble rubber emulsions, and 8 kgs of water by standard formulation. However, in the summer, the solidification rate of the saw sealant is fast, so the cementation rate can be controlled by mixing 20 to 50% by weight of cement in consideration of workability.

In particular, considering the high water pressure of the rainy season during the construction of the basement layer, the cement-based compound is placed on the mother sealing layer, and if it is dried, additionally, urethane, rubber sheet, and asphalt waterproofing are added to the top layer. Can be.

That is, the present invention is to form a waterproof sealing layer 12 in the interior of the concrete or mortar base 10, which is a waterproof layer, as shown in Figure 1, so that the coating film waterproof layer 20 excellent in interfacial adhesion capacity thereon Defects are not generated due to poor interfacial adhesion and index defects, and the surface itself is prevented from corroding and weathering after construction.

The acrylic emulsion used in the present invention will be described.

An acrylic emulsion is prepared by mixing 0.6 to 30 parts by weight of a nonionic emulsifier and 0.1 to 1 part by weight of a reaction initiator with 100 parts by weight of an acrylate monomer, followed by polymerization reaction at room temperature to 200 ° C. for 30 minutes to 24 hours.

As acrylate monomer, methyl methacrylate, ethyl methacrylate, ethyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, n-hexyl methacrylate, lauryl methacrylate 1 type from acrylate, 2-hydroxyethyl methacrylate, hydroxypropyl methacrylate, glycidyl methacrylate, ethyl acrylate, isopropyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate Select and use the above.

As an emulsifier, a nonionic emulsifier is preferable. For this, at least one selected from dodecylmethylammonium bromide, hexadecyltrimethylammonium bromide, dodecylpyridium chloride, dodecyl hydrochloride, and the like is used.

Reaction initiators include 2,2-azobis (2-amidinopropane) dihydrochloride, 2,2-azobisisobutyronitrile, 2-tert-butyl azo-2-cyanopropane, 2-tert-butyl 1 or more types of azo-2-cyanobutane, 2-tert-butyl azo-2-cyano-4-methyl pentene, cumyl peroxide neodecanoate, tert-butyl peroxy-2-ethylhexanoate, etc. Select and use.

Hereinafter, a method of preparing a silicone emulsion and a cement compound will be described in detail.

Preparation of Silicone Emulsions

Preparation Example 1

5 g of 2-ethoxyethanol and n-butanol are mixed together with 7 g of colloidal silica (product name: Nalcock 1115, manufactured by Nalco Chemical Co., Ltd.), and 100 g of 2-ethylhexyltriethoxysilane is added thereto over 30 minutes. After stirring slowly, 18 g of polyoxyethylene sorbitol oleate was further added and stirred as an emulsifier, and 365 g of distilled water was added and stirred to obtain a milky silicone emulsion (A-1).

Preparation Example 2

15 g of polyoxyethylene monooleate and 365 g of water were added to 100 g of octyl triethoxysilane and emulsified and dispersed, and 5 g of n-butanol and n-octyl alcohol were added and mixed, followed by colloidal silica (product name: Niacol 215, nia). Kohl's product) was added to 10 g to obtain a stable milky silicone emulsion (A-2).

Preparation of Cement Compounds

Preparation Example 3

60 g of ethyl methacrylate, 40 g of 2-hydroxyethyl methacrylate, and 2.7 g of dodecylmethylammonium bromide, an emulsifier, were mixed and emulsified and dispersed by adding 200 g of water, and then 2,2-azobis (as a reaction initiator) 0.08 g of 2-amidinopropane) dihydrochloride was added and then polymerized for 3 hours to give a milky acrylic emulsion. Next, 120 g of the acrylic emulsion prepared above and 360 g of water were added and stirred to 1 kg of a soro seal (product manufactured by Soro Systems Co., Ltd., cement and slaked powder) to prepare a cement compound (B-1).

Preparation Example 4

870 g of Portland cement, 130 g of slaked lime, 145 g of the acrylic emulsion prepared in Preparation Example 3, and 360 g of water were mixed and stirred to prepare a cement compound (B-2).

Preparation Example 5

A cement compound (B-3) was prepared by mixing and stirring 60 g of the acrylic emulsion prepared in Preparation Example 3, SBR latex 2108 (manufactured by JSR Japan), and 340 g of water in 1 kg of a sawo seal.

Preparation Example 6

70 g of ethyl methacrylate, 15 g of 2-ethylhexylethylene monooleate, and 2.5 g of hexadecyltriammonium bromide, which are emulsifiers, were mixed and emulsified and dispersed by adding 220 g of water. 0.1 g of 2-cyanopropane was added and then polymerized for 3 hours to give a milky acrylic emulsion. Next, 120 g of the acrylic emulsion prepared above and 360 g of water were added and stirred to 1 kg of a soro seal (product of Soro Systems Co., Ltd., cement and slaked powder) to prepare a cement compound (B-4).

Preparation Example 7

A cement compound (B-5) was prepared by mixing 800 g of Portland cement, 200 g of slaked lime, 160 g of the acrylic emulsion prepared in Preparation Example 6, and 380 g of water.

Hereinafter, the present invention will be described in more detail with reference to the following examples.

Example 1

Make cement bricks (190 mm x 90 mm x 55 mm) and concrete samples of this size, apply silicone emulsion (A-1) to all six sides of each sample, and use the brush immediately after the milk color disappears. The cement compound (B-1) was applied twice so as to have a thickness of 1 mm, and then dried at room temperature for 72 hours.

Next, one of the two samples was cut to measure the depth of penetration of the silicone emulsion, that is, the thickness of the waterproof sealing layer. The thickness of the brick was 12 mm, and in the case of concrete, 3 mm. In addition, two samples, each of which was cut on one side, were immersed in water for 72 hours and then taken out, and the other side of the sample was cut again and observed. Where the waterproof sealing layer was formed it could be confirmed that water did not penetrate.

Example 2

The same conditions and methods as in Example 1 were conducted except that B-2 was used as the cement compound. The result was also no different from Example 1.

Example 3

The same conditions and methods as in Example 1 were conducted except that B-3 was used as the cement compound. The results were also similar to those of Example 1, it was confirmed that the workability and self-leveling properties of the cement compound more improved.

Example 4

The silicone emulsion was tested under the same conditions and methods as in Example 1 except that A-2 and B-4 were used as cement compounds. At this time, the thickness of the waterproof sealing layer was 10 mm for bricks and 2.5 mm for concrete.

Example 5

The same conditions and methods as in Example 4 were conducted except that B-5 was used as the cement compound. The result was similar to Example 4.

As described through the above embodiment, according to the present invention it can be seen that when the silicone emulsion is applied to the surface of the parent brick or concrete to be waterproof, a waterproof sealing layer is formed deep in the matrix.

As described in detail above, in the present invention, when the silicone emulsion is sprayed and applied to the surface of concrete or mortar to be waterproofed, the silicone emulsion is adsorbed and penetrated therein, and the cement compound is spray-coated or brush-coated thereon to be waterproof. In the construction, even if the surface of the waterproof layer is not sufficiently dried or the smoothness is poor, poor construction and poor adhesion between the waterproof layers (lack of interfacial adhesion, lifting and breakage of the waterproof layer) will not occur. In addition, the waterproof construction method is not only easy to waterproof waterproof construction with a small number of people, but also waterproof construction is possible even without skilled workers, and also has an excellent waterproof effect.

Claims (20)

A silicone emulsion for waterproofing concrete sealants comprising 100 parts by weight of silane represented by the following formula, 2 to 20 parts by weight of colloidal silica, 2 to 40 parts by weight of emulsifier, and 80 to 150 parts by weight of alcohol. [expression] (Wherein R is a hydrocarboxyl group having 2 to 17 carbon atoms, R 'is a hydrolyzable group and n is 1 or 2) The method of claim 1, wherein the silane is ethyltriethoxysilane, ethyltrimethoxysilane, ethyltri-n-propoxysilane, isobutylethoxysilane, isobutyltrimethoxysilane, isobutyltriacetoxysilane, n-hexyltrimethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, octyltriethoxysilane, octylmethylniisopropoxysilane, lauryltrimethoxysilane, 2-ethylhexyltrimethoxysilane, At least one selected from octyltriethoxysilane, dodecyltribromosilane, tetradecyltrimethoxysilane, hexadecyltriethoxysilane, octadecyltriethoxysilane, dimers and trimers thereof and oligomers thereof Silicone emulsion for sealing concrete waterproofing. 3. The silicone emulsion of claim 2, wherein the silane has a molecular weight of 150 to 450. According to claim 1, wherein the colloidal silica has a pH of 8 to 11 silicone emulsion for sealing concrete waterproof. The silicone emulsion of claim 1, wherein the colloidal silica is a silica sol having a content of SiO ₂ of 20% or less. The method of claim 1, wherein the emulsifier is polyoxypropylene manitol dioleate, polyoxyethylene sorbitol oleate, polyoxyethylene monooleate, polyoxyethylene stearate, sorbitan monostearate, sorbitan monooleate, glycerol Silicone emulsion for waterproof waterproofing concrete, characterized in that at least one selected from nonionic emulsifiers consisting of monostearate, polyoxyethylene sorbitol hexastearate, sorbitan tristearate, sorbitan trioleate. The method of claim 1, wherein the alcohol is methanol, ethanol, n-butanol, isopropanol, 2-ethoxyethanol, t-butanol, 2-ethylhexanol, isoamyl alcohol, n-octyl alcohol, 2-amyl alcohol, cyclo Waterproofing silicone emulsion, characterized in that at least one selected from hexanol, n-propanol, benzyl alcohol. 8. The silicone emulsion for waterproofing concrete according to claim 7, wherein the alcohol has a solubility parameter of 9 to 16. The silicone emulsion of claim 1, wherein the water is distilled water. Forming a sealing layer in the interior of the mother body by applying the silicone emulsion of claim 1 to the mother surface of the concrete or mortar (mother body) as the waterproof layer; Waterproofing construction method of the concrete comprising the step of forming a waterproof coating layer by applying a cement-based compound on the surface of the concrete on which the waterproof sealing layer is formed. The method of claim 10, wherein the cement compound is made of water by adding at least one rubber-based latex, cement, calcined lime, and sawo seal to the acrylic emulsion by mixing and stirring one or more kinds thereof. The method of claim 11, wherein the cement compound is made by adding a certain amount of water while mixing and stirring an acrylic emulsion, at least one rubber-based latex, and a sawo seal in a ratio of 5 to 50 parts by weight. The method of claim 12, wherein the cement compound is a mixture of acrylic emulsion and rubber latex in a weight ratio of 1: 0.1 to 5, followed by mixing and stirring with a sawo seal. 12. The waterproofing method according to claim 11, wherein the cement compound is made by adding a certain amount of water while mixing and stirring at least one acrylic emulsion, at least one rubber latex, and portland cement or slaked lime at a ratio of 10 to 30: 100 parts by weight. Construction method. 15. The method of claim 14, wherein the cement compound is a mixture of acrylic emulsion and rubber latex in a weight ratio of 1: 0.1 to 5, and then mixed and stirred with Portland cement alone or slaked lime. 12. The method of claim 11, wherein the acrylic emulsion is polymerized by mixing 0.6-30 parts by weight of a nonionic emulsifier and 0.1-1 part by weight of a reaction initiator with 100 parts by weight of an acrylate monomer. The method of claim 16, wherein the acrylate monomer is methyl methacrylate, ethyl methacrylate, ethyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, n-hexyl methacrylate Acrylate, lauryl methacrylate, 2-hydroxyethyl methacrylate, hydroxypropyl methacrylate, glycidyl methacrylate, ethyl acrylate, isopropyl acrylate, n-butyl acrylate, 2-ethyl Waterproof construction method of concrete, characterized in that at least one selected from hexyl acrylate. The method of claim 16, wherein the nonionic emulsifier is at least one selected from dodecylmethylammonium bromide, hexadecyltrimethylammonium bromide, dodecylpyridium chloride, and dodecyl hydrochloride. The method of claim 16, wherein the reaction initiator is 2,2-azobis (2-amidinopropane) dihydrochloride, 2,2-azobisisobutyronitrile, 2-tert-butyl azo-2-cyanopropane , 2-tert-butyl azo-2-cyanobutane, 2-tert-butyl azo-2-cyano-4-methylpentene, cumyl peroxide neodecanoate, tert-butyl peroxy-2-ethylhexano Waterproof construction method of concrete, characterized in that at least one selected from Eight. 11. The method of waterproofing concrete according to claim 10, wherein the coating is further applied on the top of the waterproof layer by using any one of urethane, rubber sheet, asphalt and epoxy.