WO2011105734A2 - Polymer-based film waterproofing agent mixed with cement, and preparation method thereof - Google Patents

Abstract

The present invention relates to a polymer-based film waterproofing agent mixed with cement which is coated on a structure requiring waterproofing and water leakage prevention so as to show excellent chemical resistance, weather resistance, crack resistance and impact resistance and high tensile strength in addition to waterproofness by preventing penetration of water into the structure, and a preparation method thereof. The polymer-based film waterproofing agent mixed with cement of the present invention comprises: 65-75 wt% of an acrylic emulsion; 12-20 wt% of micro-cement; 10-18 wt% of quicklime; 0.02-0.2 wt% of a superplasticizer; 0.02-0.2 wt% of an antifoaming agent; and 0.02-0.2 wt% of an expansion agent. The preparation method comprises: the first step of preparing 65-75 wt% of an acrylic emulsion in a liquid state in a first circular container; the second step of preparing 12-20 wt% of micro-cement in a powder state, 10-18 wt% of quicklime, 0.02-0.2 wt% of a superplasticizer, 0.02-0.2 wt% of an antifoaming agent, and 0.02-0.2 wt% of an expansion agent in a second circular container; and the third step of pouring the contents prepared in the second circular container into the first circular container to dilute the same with an electric mixer.

Description

Cement-containing polymer coating waterproofing agent and method of manufacturing the same

The present invention relates to a cement-based polymer coating waterproofing agent and a method of manufacturing the same, and more particularly, by applying to a structure that requires waterproofing and leakage prevention, as well as a waterproof function that prevents water from penetrating the structure, as well as excellent chemical and weather resistance The present invention relates to a cement-containing polymer coating waterproofing agent having high cracking resistance, impact resistance, hydrophilicity and high tensile strength, and a method of manufacturing the same.

The cement-based polymer coating waterproofing agent according to the present invention can be used for waterproofing exposed areas of a concrete structure such as a roof or a parking lot of a building and an inner and outer walls of a building, a bridge, a dam, and the like. Steel structures, wood structures, Fiber Reinforced Plastics (FRP) structures, styrofoam, tiles and stones can be used for the same purpose.

In the following description will be described by taking the case of being applied to the concrete structure as an example.

In general, concrete has a weak waterproofing ability, so a waterproofing agent is used to prevent water penetration and leakage of most buildings. As a result of concrete construction surface or material used, asphalt waterproofing, sheet waterproofing, mortar waterproofing, sealing agent waterproofing, coating film Its main components are waterproof, and the main components are asphalt, calcium chloride, fatty acid soap, synthetic rubber, natural rubber, vinyl acetate, vinyl chloride, acrylic ester, etc. mixed in cement to increase the watertightness according to chemical changes and paint waterproofing agent. It is used as a method to prevent the penetration of water into concrete, and its functional role is to enhance the waterproofing effect, while not adversely affecting other properties of concrete, and to prevent the behavior of buildings or microcracks that may be caused by temperature changes and vibrations. You should be able to.

In addition, there is a method in which a liquid coating film is applied by mixing or mixing a material to which a heating, hydrosetting, or two-liquid curing chemical substance is added in situ.

The above-described materials (mainly heated asphalt, room temperature asphalt, chloroprene, polyurethane, etc.) are cured at the same time as curing and form a smooth surface. Such a material is excellent in elasticity and may be used as a function of protecting it by being installed at a crack or a joint part.

In addition, under the conditions of use and exposure conditions, the elongation capacity of a particular material or system may vary depending on the elongation of the material, the thickness of the coating formed, the length of the coating material between the unattached portions of both cracks and gaps.

The above-mentioned waterproof coatings are a method of forming a film having a specific thickness of non-specificity through crosslinking of urethane and polyisocyanate in the form of a polymer-based organic sole, and a cement-containing polymer coating waterproofing agent having a mixed form of inorganic and organic. The system is composed of cement as a main component, and the organic system is a mixture of water-soluble emulsions in which an oily liquid is emulsified in water (O / W) or water is emulsified in an oily liquid (W / O) using various emulsifiers. Cement hydration reaction by moisture, the method of bonding cement particles and spherical polymer to form a continuous coating to form a solid non-specific coating, and also to transfer the liquid or solid form of asphalt (rubber-based asphalt, emulsified asphalt) in the field Structure coating from external moisture and various physical actions by treatment and coating on the surface To protect the

As described above, various coating waterproofing agents have been developed and used to protect concrete structures or structures, and have strong adhesion to concrete, excellent waterproofness and weather resistance, and do not have neutral chemical reactions. There is an alkaline polymer cement-based inorganic coating waterproofing agent.

The polymer cement-based inorganic film waterproofing agent is close to the paint waterproofing agent, but may be classified as a waterproofing agent having a chemical reaction due to the addition of cement, thereby increasing the watertightness.

The polymer cement-based inorganic film waterproofing agent is composed of cement, acrylic sand, ceramic minerals, etc., which is a powder component, and cement-compatible acrylic emulsion polymers, which are mixed with the above-mentioned materials. There is a problem that the composition should be prepared, but the mixing ratio of the materials is not constant, and the stirring and mixing are neglected, resulting in a non-uniform composition.

Korean Utility Model Model No. 20-0175730 proposed as a solution for such a problem is 20 to 50 parts by weight of water-dispersible acrylic emulsion having 10 to 30 parts by weight of Portland cement or blast furnace cement and 40 to 50 parts by weight of solid content. , 30-60 parts by weight of silica siliceous sand of 160 mesh or less, sodium fluoride as a curing retardant, oxycarboxylic acid and its salt, sodium gluconate, sucrose, polysaccharide, sugar alcohol 0.5-1.5 parts by weight, water 1 ~ 10 parts by weight, color additives and thickeners, preservatives, heat aging inhibitors, ozone inhibitors, UV stabilizers are 0.5 to 5 by weight ratio, but the disadvantage of the prior art is the various types of curing delays that inhibit the hydration reaction In terms of the use of a chemical agent and consequently in the field of mixing and stirring the admixture (emulsion polymer) and powder (inorganic powder) in the field, The abuse of unnecessary materials has the disadvantage of increasing cost.

In addition, domestic patent registration No. 10-0406212, 35-55 parts by weight of water is heated to 40-50 ℃, emulsified and dispersed by adding 5-10 parts by weight of nonionic surfactant and 40-60 parts by weight of calcium stearate Preparing a emulsion A agent by mixing with 180 to 200 parts by weight of an acrylic emulsion resin copolymer;

And B agent prepared by mixing 50 to 70 parts by weight of No. 7 silica sand, 5 to 9 parts by weight of chromium oxide, and 0.1 to 0.5 parts by weight of polyoxyethylene lauryl ether, in 100 parts by weight of white portant cement. Mixing in a 0.25 weight ratio is suggested, but this prior art is the same as the prior art in that it is difficult for the user to make the emulsion A agent directly, and consequently, mixing and stirring in the field is performed.

 In addition, Korean Patent Registration No. 10-0661210 is composed of a liquid binder mainly composed of a silicone emulsion, and a powder containing cement and aggregate; The content of the silicone emulsion is an active content of 4 to 17% by weight relative to the cement weight, the mixing ratio of the cement and aggregate is 1: 0.5 ~ 1: 5 by weight ratio, stabilizing the matrix structure of the cement It is suggested that the co-binder is added in the range of 6 to 16% by weight relative to the cement.

Therefore, according to the above prior art, acrylic or silicone emulsion is used as a admixture, and various additives are added to improve the performance of cement-based powder (inorganic powder) and various hydration reactions and water repellency, chemical resistance, tensile strength, and the like. It can be said that they are the same in that they are used for mixing and stirring the products at the construction site.

The present invention has been made on the basis of the contents of the prior art described above, the object of which is to prepare the liquid material and other materials in the powder state in a separate circular barrel more simply to mix the contents of the two circular cylinders in use The present invention provides a cement-containing polymer-based coating waterproofing agent and a method of manufacturing the same, by improving the user's convenience so that anyone can use it by mixing and diluting.

In addition, another object of the present invention is to prevent water from penetrating the structure by mixing acrylic emulsion, cement and other materials in the construction site of the structure that needs waterproof and leak prevention, as well as excellent chemical resistance To provide a cement-containing polymer coating waterproofing agent having a weather resistance, crack resistance, impact resistance and hydrophilicity and high tensile strength and a method of manufacturing the same.

In addition, another object of the present invention is to comply with the test items specified in the Korea Industrial Standard (KSF4919-"cement-containing polymer coating film waterproofing agent"), in particular in terms of the construction of concrete structures by greatly improving the tensile strength and elongation rate It is to provide a cement-containing polymer coating film waterproofing agent having a superior performance that is not separated or separated and a method of manufacturing the same.

In addition, another object of the present invention is to use the cement-based inorganic powder shrinkage and expansion with the concrete, it is possible to easily prevent the corrosion of the concrete by discharging the moisture of the concrete to the outside to extend the life of the building It is to provide a cement-containing polymer coating film waterproofing agent and a method for manufacturing the same that can be extended.

According to a feature of the present invention for achieving the above object,

65 to 75 weight percent of an acrylic emulsion;

12 to 20 wt% microcement;

10-18% by weight of quicklime;

Glidant from 0.02 to 0.2 wt%;

Antifoam 0.02 to 0.2 wt%; And

It provides a cement-containing polymer coating film waterproofing agent consisting of;

At this time, according to an additional feature of the present invention, the acrylic emulsion is 70% by weight; The microcement is 16% by weight; The quicklime is 13.8 wt%; The glidant was 0.06% by weight; The antifoaming agent is 0.1% by weight; And 0.04% by weight of the expanding agent.

On the other hand, according to another feature of the present invention for achieving the above object,

A first step of preparing 65 to 75% by weight of an acrylic emulsion in a liquid state in a first round cylinder;

A second to prepare 12 to 20% by weight of the microcement in powder form, 10 to 18% by weight of quicklime, 0.02 to 0.2% by weight of glidant, 0.02 to 0.2% by weight of antifoam, and 0.02 to 0.2% by weight of expanding agent step; And

The third step of diluting the contents prepared in the second circular barrel by pouring in the first circular cylinder with an electric mixer; provides a method of producing a cement-based polymer coating waterproofing, characterized in that consisting of.

At this time, according to an additional feature of the present invention, the acrylic emulsion prepared in the first step is 70% by weight; The microcement prepared in the second step is 16% by weight, quicklime is 13.8% by weight, fluidizing agent is 0.06% by weight, antifoaming agent is 0.1% by weight, it is preferable that the expanding agent is 0.04% by weight.

The present invention as described above is to dilute by adding the contents of the powder form, weighed and packaged in advance to the acrylic emulsion so that they can be immediately used at the construction site, the problem of the change of physical properties or the function of the waterproofing agent by the addition or decrease of the mixing ratio. Since it does not have, inexperienced workers or anyone with an advantage that can be easily used has the effect of diluting the same coating film waterproofing agent of excellent quality regardless of the environment or skilled workers of the work site.

* In addition, the above-described cement-containing polymer coating waterproofing agent of the present invention has superior tensile strength and elongation rate than the standard of tensile strength and elongation rate set by the Korean Industrial Standard, thereby preventing water from penetrating perfectly even in the behavior of concrete structures. Of course, there is an effect having excellent chemical resistance, weather resistance, crack resistance, impact resistance, and hydrophilicity and high tensile strength.

In addition, the above-described cement-incorporated polymer-based waterproofing agent of the present invention uses a cement-based inorganic powder, so that it shrinks and expands with the concrete, and can easily prevent the corrosion of the concrete by easily discharging the moisture of the concrete to the outside. Therefore, there is an effect that can extend the life of the building.

Hereinafter, described in detail by way of examples for achieving the object of the present invention.

However, the scope of the present invention is not limited by the experiments and the examples presented in the specification of the present invention, and those skilled in the art to which the present invention pertains will be described below. It should be understood that various modifications and variations can be made within the scope of the claims.

Cement-containing polymer coating waterproofing agent of the present invention, 65 to 75% by weight acrylic emulsion, 12 to 20% by weight microcement, 10 to 18% by weight quicklime, 0.02 to 0.2% by weight fluidizing agent, 0.02 to 0.2% by weight antifoaming agent, and From 0.02 to 0.2% by weight of expanding agent.

The cement-containing polymer coating waterproofing agent as described above is a first step of preparing a 65 to 75% by weight of the acrylic emulsion in the liquid state in the first round cylinder; A second to prepare 12 to 20% by weight of the microcement in powder form, 10 to 18% by weight of quicklime, 0.02 to 0.2% by weight of glidant, 0.02 to 0.2% by weight of antifoam, and 0.02 to 0.2% by weight of expanding agent step; And a third step of diluting the contents prepared in the second round barrel to the first round barrel for 3 to 5 minutes with an electric high speed mixer.

The acrylic emulsion is commonly used as a mixture of water, a surfactant and an acrylic resin copolymer, and agitated. Such an acrylic emulsion is known to have excellent wear resistance, weather resistance, crack resistance, impact resistance and strength.

In addition, in order to maximize the watertightness and permeability, and to increase the durability and strength, the microcement preferably uses a microcement (aka: Misem 8000) having a powder degree of 8000 cm 2 / g or more. Of course, if it is recognized that the performance is partially reduced, portland cement or blast furnace cement of 3000 cm 2 / g may be used as the powder, and microcement (aka: Misem 6000) of 6000 cm 2 / g may also be used as the powder. .

In addition, the quicklime is used for a smooth hydration reaction.

In addition, the superplasticizer is used to disperse the cement particles as a blending agent to soften the concrete. A lubricating film is formed between the particles to reduce the mutual adhesion between the components, thereby improving the quality of the blended or hardened concrete. The liquidity is greatly improved without changing.

Applicant has confirmed through experiments that various fluidizing agents including commonly known CMC-PC, Peramin SMF30, Peramin Conpac 149S and the like can be used. In addition to the fluidizing agents of the kind set forth above, the use of other fluidizing agents is also possible. The use of such a fluidizing agent is chemically stable, making it easy to manufacture high-strength concrete, and there is an effect of almost no slump loss.

In addition, the antifoaming agent is used to suppress the foaming to control the amount of air and to reduce the function of bubbles. This makes it possible to ensure the stability of the quality, there is an effect to enhance the strength.

Applicant has confirmed through experiments that a variety of antifoaming agents including commonly known Agitan 295, Agitan P803, Agitan P833 and the like can be used. It is of course possible to use other antifoaming agents as well as the above-mentioned antifoaming agents.

In addition, the expanding agent is used to expand the cement as a material to inflate bubbles. In the present invention, various types of expanding agents generally known may be used.

EXAMPLE

Referring to the embodiment for achieving the object of the present invention.

First, commercially available liquid acrylic emulsions are prepared.

In addition, microcement (Mysem 8000) and quicklime, which do not mutually react with each other, are prepared in a small package in advance, and the respective additives (fluidizing agent, antifoaming agent, expanding agent) are also packaged together.

Weigh each of the above materials to prepare 70% by weight of the acrylic emulsion, 16% by weight of microcement, 13.8% by weight of quicklime, 0.06% by weight of glidant, 0.1% by weight of antifoaming agent, 0.04% by weight of expanding agent, and then the acrylic emulsion in the liquid state. In the first round barrel, the microcement, quicklime, glidant, antifoaming agent and expanding agent in the remaining powder form are placed in a second round barrel and closed and stored. At this time, it is preferable that each circular cylinder is sealed, and it is preferable that a 1st circular cylinder has a volume 2 times or more than a 2nd circular cylinder. The reason for using the circular cylinder in the above is to ensure a smooth dilution in the dilution process using an electric mixer.

In addition, when the antifoaming agent and the expanding agent is in a liquid state rather than a powder state, it should be stored in a first round cylinder.

As described above, the first and second circular barrels containing the prepared contents are transported to the site to be constructed, and cleaned using a high pressure sprayer to remove foreign substances from the construction surface of the concrete structure to be constructed.

Thereafter, the contents contained in the second round barrel are poured into the first round barrel, and then diluted with an electric mixer of RPM 600 or more for 3 minutes to 5 minutes to prepare a cement-incorporated polymer coating waterproofing agent so that there is no lumped powder.

The cement-containing polymer coating waterproofing agent may be applied to a construction surface of a concrete structure by using a brush, roller, or a nozzle to a thickness of about 2 to 4 mm and dried at room temperature for 3 to 4 hours to complete waterproof construction.

In addition, if necessary, a separate coating may be further applied to the surface of the dried coating waterproofing agent.

On the other hand, the applicant of the present invention was made in the same manner as the cement-containing polymer coating film waterproofing agent in the same manner as the embodiment was applied to the concrete surface and dried at room temperature to measure the properties thereof. The measurement was commissioned by the Institute of Construction Technology, Seoul National University of Technology for objectivity of the results.

The resulting quality test report is shown in Table 1 below.

[Revision 22.04.2011 under Rule 26]
Table 1

The above measurement results of the present invention were measured based on KSF4919.

Looking at the results in Table 1, in terms of adhesion strength, it was found that the standard and the result of 0.9 and 0.8 after immersion to meet the quality criteria that should be more than 0.8, and also obtained a result of no abnormality in the resistance to cross-linking In addition, it was found that satisfies the quality standard that the result should be 0.4 or less in terms of absorption amount.

In particular, in terms of tensile performance, it was found to meet the quality standard of obtaining a result of tensile strength 1.4 and above 1.0, and to meet a quality standard of obtaining a result of elongation of 323 and above 50. As a result, it can be seen that the tensile strength and the elongation rate are superior to the quality standards.

In terms of water permeability, it has been shown to meet the quality standard that it should not be permeable, and in terms of moisture permeability, it has been found to meet the quality standard of 0.73 or less, and in terms of crack resistance, it is below 10 ° C. The result of the measurement at 20 ° C. was found to satisfy the quality standard of obtaining no abnormality and not to break, and to meet the quality standard of obtaining no abnormality in terms of alkali resistance.

Accordingly, the present invention is a cement-containing polymer system having excellent chemical resistance, weather resistance, crack resistance, impact resistance and hydrophilicity and high tensile strength as well as a waterproof function that prevents water from penetrating perfectly without cracking and behavior of concrete structures. It can provide a film waterproofing agent.

Claims (4)

1. 65 to 75 weight percent of an acrylic emulsion;

   12 to 20 wt% microcement;

   10-18% by weight of quicklime;

   Glidant from 0.02 to 0.2 wt%;

   Antifoam 0.02 to 0.2 wt%; And

   0.02 to 0.2 wt% expanding agent;

   Cement-containing polymer coating waterproofing agent, characterized in that consisting of.
2. The method of claim 1,

   The acrylic emulsion is 70% by weight;

   The microcement is 16% by weight;

   The quicklime is 13.8 wt%;

   The glidant was 0.06% by weight;

   The antifoaming agent is 0.1% by weight; And

   The expansion agent is 0.04% by weight; Cement-containing polymer coating waterproofing agent, characterized in that consisting of.
3. A first step of preparing 65 to 75% by weight of an acrylic emulsion in a liquid state in a first round cylinder;

   A second to prepare 12 to 20% by weight of the microcement in powder form, 10 to 18% by weight of quicklime, 0.02 to 0.2% by weight of glidant, 0.02 to 0.2% by weight of antifoam, and 0.02 to 0.2% by weight of expanding agent step; And

   And diluting the contents prepared in the second round barrel into the first round barrel and diluting them with an electric mixer. 2.
4. The method of claim 3, wherein

   The acrylic emulsion prepared in the first step is 70% by weight;

   The microcement prepared in the second step is 16% by weight, quicklime is 13.8% by weight, fluidizing agent is 0.06% by weight, antifoaming agent is 0.1% by weight, expanding agent is 0.04% by weight Manufacturing method.