KR100452120B1 - Waterproofing Elastomeric Membrane Material Using Recycle Tire Rubber Power And The Construction Work Method - Google Patents

Abstract

The present invention relates to a water dispersible elastic coating waterproofing agent using waste tire powder and a construction method thereof, wherein the acrylic acid ester repeating unit (A), the methacrylic acid ester repeating unit (B), and a polar group represented by the following general formula (1) (C) is characterized in that the acrylic emulsion polymer consisting of the waste tire powder, waste glass powder and cement mixed with a waterproofing agent and a construction method using the same.

Formula 1

In Formula 1, R1 is any one selected from an alkyl group having 0 to 8 carbon atoms, R2 is any one selected from an alkyl group having 0 to 16 carbon atoms, R3 is OH, NH2, C = N, NHCH ₂ OH, CH2 = CH, And COOH having a terminal selected from the group consisting of n is a positive integer.

Description

Water-dispersible elastic coating waterproofing agent using waste tire powder and construction method {Waterproofing Elastomeric Membrane Material Using Recycle Tire Rubber Power And The Construction Work Method}

The present invention relates to a water-dispersible elastic coating waterproofing agent using the waste tire powder and its construction method, and more particularly, excellent in the weatherability, cold resistance and wettability, as well as excellent adhesion strength, tensile strength and water permeability. It relates to a waterproofing agent having excellent fatigue resistance, abrasion resistance, impact resistance and breathability, and a construction method using the same.

In general, waterproofing is applied to the roof, roof, underground, inner and outer walls of buildings. The waterproofing agent using waste tire powder includes the inorganic elastic coating waterproofing agent and the polyurethane elastic coating waterproofing agent.

The inorganic elastic coating waterproofing agent is composed of inorganic powder and thermoplastic EVA emulsion, and the polyurethane elastic coating waterproofing agent is divided into a thermoplastic one-part coating waterproofing agent and a thermosetting two-part coating waterproofing agent.

Such conventional elastic coating waterproofing agents have a problem that they are embrittled by ultraviolet rays when exposed to sunlight for a long time, has a weak heat resistance cold resistance, in particular, the elastic coating waterproofing agents are toluene or xylene (see Korean Patent Publication No. 2000-0009304) and Because it contains the same organic solvents, there is a problem that is harmful to the health of workers, as well as environmental pollution due to solvent evaporation during construction.

In addition, the work in a high humidity environment has a problem of causing bubbles due to the adhesion strength is reduced, there was a problem of permeability and breathability.

The present invention has been made to solve the above problems, the object of the present invention is excellent weather resistance and cold resistance, good tensile strength and elongation, even if cracks, expansion or shrinkage of the substrate on which the waterproofing agent is deposited It is possible to prevent breakage or lifting of the deposited elastic coating waterproof layer. Especially, since it has water dispersibility, it is possible to solve environmental pollution and fire risk due to solvent evaporation during construction, and at the same time, it uses waste tire powder having excellent workability in wet conditions. It is to provide a water-dispersible elastic coating waterproofing agent.

Another object of the present invention to provide a method for constructing a water-dispersible elastic coating waterproofing agent using the waste tire powder.

In order to achieve the above object, the present invention provides an acrylic emulsion polymer consisting of acrylic acid ester, methacrylic acid ester and polar group, and a waterproofing agent consisting of waste tire powder and hydraulic cement, and using the same, a method of construction under certain conditions It is done.

When explaining the structure of the present invention for achieving the above object, an acrylic emulsion polymer consisting of a repeating unit (A) having a acrylate ester repeating unit (A), a methacrylic ester ester (B) and a polar group represented by the formula (1) Waste tire powder and waste glass powder are added and constituted, and hydraulic cement is added and blended therein.

Formula 1

In Formula 1, R1 is any one selected from an alkyl group having 0 to 8 carbon atoms, R2 is any one selected from an alkyl group having 0 to 16 carbon atoms, R3 is OH, NH2, C = N, NHCH ₂ OH, CH2 = CH, And a polar group having a terminal selected from the group consisting of COOH, N is a positive integer.

The acrylic emulsion polymer of the present invention is 5 to 95 parts by weight of the acrylic ester repeating unit (A), 5 to 95 parts by weight of the methacrylic acid ester repeating unit (B) and 1 to 20 parts by weight of the repeating unit (C) having a polar group. It is preferable to use 45 to 55% by weight of the total weight, and the weight average molecular weight of the acrylic emulsion polymer is preferably used to 100,000 to 500,000.

The waste tire powder of the present invention is preferably 40 to 50 mesh, which is 22 to 30% by weight of the total weight, and waste glass powder is optionally added, but preferably 5 to 10% by weight or less of the total weight.

The cement of the present invention described above is hydraulic, and it is preferable that it is 20 to 25% by weight of the total weight.

The acrylic emulsion polymer used in the waterproofing agent according to the present invention includes an acrylic ester repeating unit (A) and a methacrylic acid ester repeating unit (B) in the main chain. Such an acrylic emulsion polymer not only has good adhesion but also has excellent UV resistance (weather resistance), acid resistance, alkali resistance, and heat resistance and cold resistance, but it has poor compatibility with waste tire powder, thus making an elastic coating waterproofing agent. Poor dispersion

Therefore, in the present invention, as shown in Formula 1, OH, NH 2, C = N, NHCH ₂ OH, CH 2 = CH, And a repeating unit (C) having, as side chains, at least one polar group having a terminal selected from the group consisting of COOH to improve dispersibility with the waste tire rubber powder.

The repeating unit (C) having the OH polar group includes 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, and the like. The repeating unit (C) having a dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, acrylamide and the like, and the repeating unit (C) having a C = N polar group include acrylonitrile and the like, NHCH ₂ OH Examples of the repeating unit (C) having a polar group include N-metholacrylamide, and examples of the repeating unit (C) having a CH 2 = CH polar group include dibutyl amyl methacrylate and the like. Examples of the repeating unit (C) having a polar group include glycidyl methacrylate and glycidyl acrylate. Examples of the repeating unit (C) having a COOH polar group include acrylic acid, methacrylic acid, itaconic acid and maleic acid.

The acrylic emulsion polymer incorporating the repeating unit (C) having the polar group has good water dispersibility, which eliminates the necessity of using an organic solvent during construction, thereby preventing the risk of environmental pollution and fire, etc., as well as excellent adhesion in a wet state. Do.

The waste tire powder used in the water-dispersible elastic coating waterproofing agent of the present invention grinds the waste tire with a grinder. The average particle diameter of the rubber powder is preferably 40 to 50 mesh, and the content of the waste tire rubber powder is based on the acrylic emulsion polymer. It is preferable to use in the range of 22 to 78% by weight, and may be optionally used in the range of 5 to 10% by weight of waste glass powder depending on the waterproof use.

In addition, a filler may be further added when preparing the water-dispersible elastic coating waterproofing agent of the present invention, and a surfactant, a dispersant, etc. may be further added to improve the dispersibility of the acrylic emulsion polymer and the waste tire rubber powder.

In the application of the above blended and mixed waterproofing agent, apply roller or spray treatment so that the dry film thickness becomes 1 mm, and repeat the treatment at least twice by drying at room temperature for 4 to 8 hours after drying at room temperature. do. Such construction may differ in the conditions and the number of times of the repeating process depending on the part of the construction site.

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

Example 1

81.2 parts by weight of ion-exchanged water was used as a reaction solvent while nitrogen gas was gradually passed through a 1000 ml reactor equipped with a stirrer, a temperature controller, a catalyst injection device, a dropping funnel, and a cooler, and 1 part by weight of catalyst KPS was dissolved.

Subsequently, in a separate high speed stirrer, 110.3 parts by weight of ion-exchanged water, 8.42 parts by weight of nonylphenol (EO 40 mol) serving as a surfactant, 114.2 parts by weight of butyl acrylate monomer, and 142.3 parts by weight of methyl methacrylate monomer were added and emulsified. Then, 2.0 parts by weight of the acrylic acid monomer and 12.8 parts by weight of the acrylonitrile monomer were added to stabilize the emulsion.

Then, 0.69 parts by weight of KPS catalyst was added while the temperature of the reactor was increased to 75 ° C, polymerization was carried out for 5 hours, and aged for 3 hours to obtain an acrylic emulsion polymer having a weight average molecular weight of 250,000.

At this time, the concentration of the solid content of the polymerization reaction was fixed to 50 to 60% by weight, the reaction temperature was not to exceed ± 2 ℃.

After completion of the reaction, 25 parts by weight of calcium carbonate, 0.5 parts by weight of nonylphenol (8 moles), 1.0 part by weight of NOPCO NXZ, 0.3 part by weight of SHMP, and an average particle diameter of 45 mesh to 3 parts by weight of the acrylic emulsion polymer 32.5 Part by weight and 21 parts by weight of cement were respectively added at high speed to prepare a water-dispersible elastic coating waterproofing agent.

Example 2

A water-dispersible elastic coating waterproofing agent was prepared in the same manner as in Example 1 except that 25.6 parts by weight of acrylonitrile monomer was added.

Example 3

A water-dispersible elastic coating waterproofing agent was prepared in the same manner as in Example 1 except that 38.4 parts by weight of acrylonitrile monomer was added.

Example 4

A water dispersible elastic coating waterproofing agent was prepared in the same manner as in Example 1 except that 25.6 parts by weight of acrylonitrile monomer was added and 22.5 parts by weight of waste tire rubber powder was used based on 100 parts by weight of the acrylic emulsion polymer.

Example 5

A water dispersible elastic coating waterproofing agent was prepared in the same manner as in Example 1 except that 25.6 parts by weight of acrylonitrile monomer was added and 52.5 parts by weight of waste tire rubber powder was used based on 100 parts by weight of the acrylic emulsion polymer.

Example 6

A water dispersible elastic coating waterproofing agent was prepared in the same manner as in Example 1 except that 25.6 parts by weight of acrylonitrile monomer was added and 77.5 parts by weight of waste tire rubber powder was used based on 100 parts by weight of the acrylic emulsion polymer.

The water-dispersible elastic coating waterproofing agent prepared according to the above embodiment was applied on a glass plate by roller or spray treatment to have a dry coating thickness of 2 mm, dried at room temperature, and then dried at 60 ° C. for 6 hours, and then at room temperature. After standing for 24 hours, the physical properties were measured and shown in Table 1 below.

Tensile Strength (㎏f / ㎠) % Elongation Example 1 18.2 385.4 Example 2 20.8 375.8 Example 3 16.4 420.3 Example 4 14.2 186.4 Example 5 17.1 195.1 Example 6 15.4 161.4

The coating film formed by using the waterproofing agent of the present invention referring to Table 1 has a high tensile strength and elongation, and even if a crack, expansion, or shrinkage of the substrate on which the waterproofing agent is deposited occurs, the coated elastic coating waterproof layer was not affected.

In addition, the coating results of the coating film formed by the waterproofing agent of the present invention are shown in Table 2, the test results for each test item of the Institute of Construction Technology, Seoul National University of Technology.

The coating film constructed and formed by the water-dispersible elastic coating waterproofing agent of the present invention has excellent weather resistance and cold resistance, and has good tensile strength and elongation, so that even when cracking, expansion or contraction of the substrate on which the waterproofing agent is applied occurs, In particular, the present invention has the effect of preventing the lifting and lifting, in particular, the present invention has an excellent dispersibility in the wet state because it has a water dispersibility, and therefore, during the civil works, such as asphalt road construction or waterproofing and repairing the interior and exterior walls of buildings Useful for

Claims (6)

In the waterproofing agent using waste tire powder, an acrylic emulsion polymer comprising an acrylic ester repeating unit (A) represented by the following formula (1), a methacrylic acid ester repeating unit (B) and a repeating unit (C) having a polar group and the waste tire Water-dispersible elastic coating waterproofing agent using waste tire powder, characterized in that consisting of powder, waste glass powder and cement mixed. Formula 1 In Formula 1, R1 is any one selected from an alkyl group having 0 to 8 carbon atoms, R2 is any one selected from an alkyl group having 0 to 16 carbon atoms, R3 is OH, NH2, C = N, NHCH ₂ OH, CH2 = CH, And COOH having a terminal selected from the group consisting of n is a positive integer. delete The method of claim 1, The acrylic emulsion polymer is characterized in that consisting of 5 to 95 parts by weight of the acrylic acid ester repeating unit (A), 5 to 95 parts by weight of the methacrylic acid ester repeating unit (B) and 1 to 20 parts by weight of the repeating unit (C) having a polar group. Water-dispersible elastic coating waterproofing agent using waste tire powder. The method of claim 1, Moisture using waste tire powder, characterized in that the content of the waste tire powder 22 to 78% by weight, the content of the waste glass powder 5 to 10% by weight, cement 20 to 25% by weight based on the acrylic emulsion polymer Acidic elastic film waterproofing agent. The method of claim 1, The waste tire rubber powder is a water-dispersible elastic coating waterproofing agent using the waste tire powder, characterized in that the particle size of 40 to 50 mesh. The method of repeating two or more times in a process of roller or spray treatment of the waterproofing agent mixed with the physical properties of claim 1 to have a dry coating thickness of 1 mm, drying at room temperature, and then drying at 40 to 70 ° C. for 4 to 8 hours. Construction method of the water-dispersible elastic coating waterproofing agent using the waste tire powder characterized in that.