KR20000032229A - Ultra-quick curing aqueous coating film water-proofing agent and preparing method and use of it - Google Patents

Abstract

PURPOSE: A water proofing agent useful in aqueous paint, concrete, ready mixed concrete and mortar is prepared by using alcohol compound and polymer cement together. CONSTITUTION: 100 weight parts of pre-crosslinked natural rubber latex, 2- 5 weight parts of nonionic emulsifier, 10-30 weight parts of asphalt and 20-50 weight parts of vinyl acetate resin are mixed to give first blending solution. 100 weight parts of styrene-butadiene rubber, 1-3 weight parts of oleic acid and its salt and 30-50 weight parts of acryl resin are mixed to give second blending solution. 10-15 Weight parts of alcohol compound, 10-20 weight parts of ethylene-vinyl laurate-vinyl chloride ternary copolymer, 5-10 weight parts of ultra-curing cement and 20-30 weight parts of sand are mixed to give polymer cement. 100 weight parts of coating film water-proofing agent containing 100 weight parts of first blending solution and 50-70 weight parts of second blending solution are mixed with 20-30 weight parts of polymer cement to give the title water proofing agent.

Description

Ultrasonic Carbide Water-Resistant Coatings, Manufacturing Methods And Uses

The present invention relates to a super fast-water-soluble coating film waterproofing agent, a method for manufacturing the same, and a use thereof. More specifically, the present invention relates to a waterproofing function that prevents water from penetrating into a basement or a rooftop, as well as resistance to corrosion and cracking of building and civil structural materials. The present invention relates to a coating film waterproofing agent using natural rubber latex, alcohol mixture and polymer cement, which can be applied to a copper-based mirror, and a method of preparing the same, and an aqueous paint, concrete, ready-mixed concrete and mortar containing the same.

The waterproofing agent is an emulsion type mainly composed of rubber asphalt, acrylic rubber or acrylic resin, and the reactive type mainly containing solution urethane or epoxy resin containing chloroprene or chlorosulfonated polyethylene, among which the rubber asphalt type and urethane type waterproofing agent are It is used a lot.

Rubber asphalt waterproofing agent is prepared by mixing the synthetic rubber and various resins in asphalt and using the thermosetting method to rapidly cure the thermoplastic properties of the polymer, and by the cold method of emulsifying the asphalt in synthetic latex and then natural curing by evaporation of moisture. In general, asphalt is mixed with a styrene polymer, atactic polypropylene, styrene-butadiene latex, and the like.

In addition, Korean Patent Publication No. 76-371 discloses a method for preparing a polystyrene-based asphalt coating waterproofing agent having a styrene rate of 10 to 30% by polymerization under a catalyst after mixing a styrene monomer and asphalt without using a styrene-based polymer. have.

On the other hand, the urethane-based waterproofing agent is a solvent type urethane type is commonly used, and recently, in consideration of the environmental safety and work safety against toxicity, developed and used a water-soluble urethane-based waterproofing agent in the form of polyurethane emulsion, polyurethane colloidal dispersion, polyurethane aqueous solution, etc. However, in terms of durability, all of the physical properties, such as the existing solvent-type urethane-based waterproofing agent remains much less.

In addition to the basic functions as a waterproofing agent to prevent water leakage in buildings and civil structures, the coating film waterproofing agents listed above have prevented the corrosion of buildings and civil structures, the habitat of weeds and pests, and the construction of flower beds on the roof of buildings. There is a problem in the plastering ability of planting trees and the resistance to cracks caused by sudden changes in external temperature. In particular, even in the case of the conventional rubber asphalt waterproofing agent, there is little rubber component and has little function to prevent cracking of buildings.

In order to solve this problem, the present inventors have prepared a mixture of 2 to 5 parts by weight of a nonionic emulsifier, 10 to 30 parts by weight of asphalt, and 20 to 50 parts by weight of vinyl acetate resin in 100 parts by weight of a natural rubber latex composition in a precrosslinked state. 100 parts by weight of blending liquid; Patent application for a coating film waterproofing agent comprising 50 to 70 parts by weight of a second blending liquid in which 1 to 3 parts by weight of oleic acid or its salt and 30 to 50 parts by weight of an acrylic resin are mixed and formed in 100 parts by weight of styrene-butadiene rubber (Korean Patent Application No. 95-11794) has already been granted a patent (Patent No. 153864).

However, in the case of such a film waterproofing agent can solve the above problems, but because it is water-soluble it can not be used below 0 ℃, there is a lot of problems, such as a long curing time delayed the subsequent process. As a result, there was a problem that cannot be used when the construction is carried out regardless of the winter as in these days.

The present invention is to solve the above problems of the water-soluble coating waterproofing agent, it can be used even at low temperature below 0 ℃ by using the alcohol mixture and polymer cement together, shorten the curing time after coating to solve the problem of the delay of the subsequent process It is to provide a film waterproofing agent that can be solved.

In addition, another object of the present invention to provide a preferred method for producing a coating waterproofing agent using the natural rubber latex.

In addition, the present invention has an object to provide a water-soluble paint, concrete, ready-mixed concrete and mortar using such a coating waterproofing agent.

The coating film waterproofing agent for achieving the object of the present invention is mixed with 2 to 5 parts by weight of nonionic emulsifier, 10 to 30 parts by weight of asphalt, 20 to 50 parts by weight of vinyl acetate resin to 100 parts by weight of the natural rubber latex composition in a precrosslinked state 100 parts by weight of the first blending liquid composition; A coating film waterproofing agent comprising 50 to 70 parts by weight of a second blending liquid obtained by mixing and forming 1 to 3 parts by weight of oleic acid or a salt thereof and 30 to 50 parts by weight of an acrylic resin to 100 parts by weight of styrene-butadiene rubber, wherein 100 parts by weight of the coating film waterproofing agent 10 to 15 parts by weight of the alcohol mixture, 10 to 20 parts by weight of ethylene vinyl laurate vinyl chloride terpolymer, 5 to 10 parts by weight of superhard cement, and 20 to 30 parts by weight of polymer cement prepared by adding 20 to 30 parts by weight of sand. It is characterized by what was added.

The present invention will be described in more detail as follows.

The coating film waterproofing agent according to the present invention is pre-vulcanized natural rubber latex and then emulsified in asphalt and mixed with vinyl acetate resin, acrylic resin, styrene-butadiene rubber, and an alcohol mixture and polymer cement are added thereto. Ball mill together with 100 parts by weight of natural rubber latex (based on solids) 3 to 8 parts by weight of crosslinking agent at 20 to 50 ° C, 7 to 11 parts by weight of heat aging inhibitor, 4 to 8 parts by weight of ozone inhibitor and 36 to 72 parts by weight of water. 2 to 5 parts by weight of nonionic emulsifier, 10 to 30 parts by weight of asphalt, and 20 to 50 parts by weight of vinyl acetate resin were mixed with 100 parts by weight of the natural rubber latex composition in a precrosslinked state, which was stirred and reacted for 20 to 30 hours. 100 parts by weight of the first blending liquid; 1 to 3 parts by weight of oleic acid or its salt is added to 100 parts by weight of styrene-butadiene rubber and reacted for 15 to 20 hours, and then 50 to 70 parts by weight of a second blending solution mixed with 30 to 60 parts by weight of acrylic resin is mixed to obtain 7 to Third blending liquid which was stirred and reacted for 12 hours; And 10 to 15 parts by weight of the alcohol mixture and 20 to 30 parts by weight of the polymer cement in 100 parts by weight of the third blending liquid.

In the present invention, the first blending liquid is first mixed with a nonionic emulsifier esterified with gum rosin while stirring the natural rubber latex composition in a precrosslinked state at a speed of 80 to 150 rpm at 40 to 60 ℃ and melt the asphalt · Add and disperse uniformly, cool to room temperature and add and mix vinyl acetate resin.

The natural rubber latex composition of the pre-crosslinked state is pre-vulcanized by adding a crosslinking agent, a heat-resistant anti-aging agent, an ozone-resistant agent and an appropriate amount of water to the natural rubber latex, and then slowly ball-milling with the addition of a subcomponent, and then at a speed of 30 to 50 rpm. It is made by stirring and reacting for 24 to 30 hours. Natural rubber latex is the main ingredient here is a kind of pre-vulcanization is continued during storage, it is not preferable to add a crosslinking agent in more than 8% by weight of the composition. Tetramethylchiuram disulfide, diphenylmethane diisocyanate or zinc carbonate may be used as a crosslinking agent for promoting vulcanization. As the anti-aging agent, normal-phenyl-normal-isopropyl-para-phenylenediamine and zinc butyl xanthate are used, and as the ozone-resistant agent, 6-ethoxy-2.2.4-trimethyl-1.2-dihydro-quinoline Or 2-mercaptobenzoimidazole can be used.

In addition, as the nonionic emulsifier, potassium rosin, sodium rosin, sodium oleate, and the like may be used. As asphalt, natural asphalt, straight asphalt, blown asphalt, asphalt compound, etc. may be used, but the penetration degree is 60 to. The use of straight asphalt of 80 is most preferable in terms of the physical properties of the waterproofing agent. As the vinyl acetate resin, both a thermoplastic resin having a vinyl acetate group of 8.5 to 33% and a thermoplastic rubber of 40 to 45% can be used. In order to improve the tensile strength and heat resistance of the rubber, a thermoplastic resin having a vinyl acetate group of 8.5 to 33% is used.

In the present invention, the second blending liquid is obtained by adding and reacting oleic acid or its salt to styrene-butadiene rubber and then mixing and stirring the acrylic resin.

The styrene-butadiene rubber is used to prevent adhesion to aggregates and bubbles during construction, and it is preferable to use a material having a high rubber content and low surface tension, specifically, a solid having a total solid content of 69% and a viscosity of 800 cps. desirable. The reason is that the more rubber components, the greater the resistance to building cracks of the coating waterproofing agent.

In addition, acrylic resins are used to impart water resistance, hardness and flexibility of the coating waterproofing agent, such as methyl methacrylate, acrylamide, methacrylamide, ethyl acrylate, 2-ethylhexyl acrylate and lauryl methacryl. Homopolymers and copolymers such as late.

In the present invention, the first and second blending liquids are separately prepared and mixed. This is the biggest feature of the present invention. The reason is that when the styrene-butadiene rubber and the acrylic resin are directly added to the first blending liquid, the viscosity changes rapidly or flocculates. Because this happens.

In the present invention, a low molecular weight polymer was used for effective blending of the coating waterproofing agent. The reason is that the glass transition temperature of each material is -65 to 105 DEG C, which is so diverse that it does not affect the state of the coating film even at very low and high temperatures.

The coating film waterproofing agent of the present invention prepared as described above is applied to the moist mortar or concrete using a pot or a rubber spatula directly, and is applied at a thickness of 1.5 to 2 mm at a time because of excellent tensile strength, elongation and restoring force. Road cracks do not occur at the corners of underground or rooftop structures.

Meanwhile, in order to enable the water-soluble coating waterproofing agent to be used at a low temperature in the present invention, the alcohol mixture and the polymer cement are added to 100 parts by weight of the composite mixture of the first blending liquid and the second blending liquid as described above. The mixture is used by mixing two or more kinds of ethyl alcohol, methyl alcohol, isopropyl alcohol and ethylene glycol.

Specifically, ethyl alcohol has a purity of 95%, molecular weight 47, specific gravity 0.78, methyl alcohol has a purity of 95%, molecular weight 33, specific gravity 0.81, isopropyl alcohol has a purity of 94%, molecular weight 60, specific gravity 0.78, and ethylene glycol has a purity of 93 %, Molecular weight 62, specific gravity 1.10, and a boiling point of 196 ° C.

Preferably, 100 parts by weight of ethyl alcohol, 5 to 10 parts by weight of methyl alcohol, 20 to 30 parts by weight of isopropyl alcohol, and 10 to 20 parts by weight of ethylene glycol are mixed.

This alcohol mixture is added in an amount of 10 to 15 parts by weight based on 100 parts by weight of the mixture of the first blend and the second blend.

If the content of the alcohol mixture is less than 10 parts by weight, the effect of improving the low temperature stability and cold resistance is less. If the content of the alcohol mixture exceeds 15 parts by weight, it causes a problem in forming thickness during construction due to the rapid decrease in viscosity of the waterproofing agent and cracking due to the deterioration of the properties of the waterproofing agent Is generated.

On the other hand, the polymer cement added together with the alcohol mixture to exert the super-speed mirror is 10 to 20 parts by weight of ethylene vinyl laurate vinyl chloride terpolymer, 5 to 10 parts by weight of ultra-fast cement and 20 to 30 parts by weight of cement It is prepared by adding parts.

The cement used in the manufacture of polymer cement can be used general portland cement, sand is used as the standard sieve of 600㎛, alumina cement is used as the super hard cement, ethylene vinyl laurate vinyl chloride terpolymer It has a particle size of 400㎛ or less, a solid content of 99%, and a product using polyvinyl alcohol as a protective colloid.

The polymer cement is added in an amount of 20 to 30 parts by weight based on 100 parts by weight of the mixture of the first blended material and the second blended material. If it is less than 30 parts by weight, the curing time is accelerated due to the excessive input, but the rapid hydration reaction may cause cracking of the coating film and decrease of the elongation rate.

When the alcohol mixture and the polymer cement are added to the water-soluble coating waterproofing agent as described above, the operation may be performed at a low temperature of 0 ° C. or less, and the curing speed may be faster to perform the subsequent process smoothly.

Such a film waterproofing agent can be used for the manufacture of water-soluble paint, concrete, ready-mixed concrete and mortar as well as simply used for waterproofing of buildings or civil structures.

Hereinafter, the present invention will be described in more detail with reference to Examples. These examples are intended to illustrate the present invention in more detail and do not limit the scope of the invention.

Example 1

To 100 parts by weight of the natural rubber latex composition of the pre-crosslinked state, 3.5 parts by weight of potassium rosinate was added while maintaining 20 ° C of straight asphalt having a penetration of 60 to 80, and gradually added to prepare an emulsion dispersion. After cooling to room temperature, a first blending solution was prepared by mixing 35 parts by weight of vinyl acetate resin having a vinyl acetate group of 8.5 to 33%.

Next, 2 parts by weight of oleic acid was mixed with 100 parts by weight of styrene-butadiene rubber, reacted and aged at 40 ° C. for 20 hours, and then 50 parts by weight of methyl methacrylate was added to form a second blending solution.

10 parts by weight of the alcohol mixture and 20 parts by weight of the polymer cement were mixed with 100 parts by weight of the mixture which was stirred and reacted at a speed of 150 rpm for 10 hours while gradually adding 60 parts by weight of the second blending solution to 100 parts by weight of the first blending liquid. Was prepared.

Here, the polymer cement is prepared by mixing 10 parts by weight of ethylene vinyl laurate vinyl chloride terpolymer, 6 parts by weight of ultrafast cement and 20 parts by weight of sand.

The alcohol mixture is a mixture of 100 parts by weight of ethyl alcohol, 5 to 10 parts by weight of methyl alcohol, 20 to 30 parts by weight of isopropyl alcohol and 10 to 20 parts by weight of ethylene glycol.

Examples 2-6

A coating film waterproofing agent was prepared in the same composition and method as in Example 1, except that the content of the polymer cement and the alcohol mixture were changed as shown in Table 1 below.

(Unit: parts by weight) Example 2 Example 3 Example 4 Example 5 Example 6 Alcohol mixture 10 10 15 15 15 Polymer Cement 10 30 10 20 30

Comparative Example 1

A coating film waterproofing agent was prepared in the same composition and method as in Example 1, except that the polymer cement and the alcohol mixture were not added.

Experimental Example

In order to evaluate the performance of the coating waterproofing agent made in each of the above examples, the coating was applied to the specimen using a brush in a standard state according to the KS standard, emulsion type on KSF3211, and then cured at room temperature for 24 hours and 120 hours at 40 ° C. After demolding and left at room temperature for 48 hours, performance test was performed. In addition, the specimens were prepared in the same manner using commercial products, and then the physical properties thereof were measured. The results are shown in Table 2 below.

Here, the heat resistance and cold resistance were marked as a state where sagging or cracking did not occur, and the sagging phenomenon was little and there was little cracking, but the hardened state was referred to as bad, and the extreme state of sagging and cracking was described as extremely bad.

The low temperature stability was marked as good when the stored product remained unchanged and the same state, and the state in which agglomeration occurred and agglomerations was bad, and the state completely frozen was marked as extremely poor.

Invention (Example) Commercial product (comparative example) One 2 3 4 5 6 Comparative Example 1 Water soluble asphalt system Water Soluble Urethane Tensile strength (kgf / ㎠) 40 39 41 39 38 40 40 5 20 Elongation (%) 800 800 810 820 820 820 800 700 450 Tear strength (kgf / cm) 28 28 29 29 29 30 28 3 15 Curing time (hours) (1mm thickness coating) 10 12 7 10 12 7 18 60 24 Heat resistance (70 ℃, 168 hours) Good Good Good Good Good Good Good Extremely poor Bad Cold resistance (solid, -30 ℃, 168 hours) Good Good Good Good Good Good Good Extremely poor Bad Low Temperature Stability (Liquid, -15 ℃, 60 Days) Good Good Good Good Good Good Bad Extremely poor Extremely poor

As can be seen from Table 1, the product of the present invention was not only excellent in tensile strength and tear strength compared to the conventional water-soluble coating waterproofing agent, it was found that the curing time is short, particularly cold resistance and low temperature stability at low temperatures.

As described in detail above, the water-soluble coating waterproofing agent prepared by adding the alcohol mixture and the polymer cement according to the present invention not only has excellent tensile strength, heat resistance, elongation rate, etc., but also has excellent cold resistance and low temperature stability, even at severe low temperatures such as winter. The work is easy and the curing time is short, so that not only the progress of the subsequent process can be easily performed, but also the coating film waterproofing agent is a one-component type, so that the construction is simple and the working time can be shortened.

Claims (8)

100 parts by weight of the first blending liquid formed by mixing 2 to 5 parts by weight of a nonionic emulsifier, 10 to 30 parts by weight of asphalt, and 20 to 50 parts by weight of vinyl acetate resin to 100 parts by weight of the natural rubber latex composition in a precrosslinked state; In the coating film waterproofing agent which consists of 50-70 weight part of 2nd blending liquids which mixed and prepared 1-3 weight part of oleic acid or its salt, and 30-50 weight part of acrylic resin with 100 weight part of styrene-butadiene rubbers, Polymer prepared by adding 10 to 15 parts by weight of alcohol mixture, 10 to 20 parts by weight of ethylene vinyl laurate vinyl chloride terpolymer, 5 to 10 parts by weight of ultrafast cement and 20 to 30 parts by weight of sand, to 100 parts by weight of the coating waterproofing agent. Ultra-fast mirror water-soluble coating waterproofing agent characterized by adding 20 to 30 parts by weight of cement. According to claim 1, wherein the alcohol mixture is an ultra-light-speed water-soluble coating film waterproofing agent, characterized in that the mixture of two or more selected from ethyl alcohol, methyl alcohol, isopropyl alcohol and ethylene glycol. According to claim 1 or 2, wherein the alcohol mixture is characterized by consisting of 100 parts by weight of ethyl alcohol, 5 to 10 parts by weight of methyl alcohol, 20 to 30 parts by weight of isopropyl alcohol and 10 to 20 parts by weight of ethylene glycol. Water-soluble coating waterproofing agent. A step of mixing the natural rubber latex with a crosslinking agent, an anti-aging agent, an anti-ozone agent, and water, followed by a ball mill, followed by stirring and reaction; Step 2 of mixing the non-ionic emulsifier, asphalt, vinyl acetate resin to the treated material of the first step; Adding oleic acid or a salt thereof to the styrene-butadiene rubber to react for 15 to 20 hours and then mixing the acrylic resin; 4 steps of reacting the treated material of the second step and the processed material of the three steps by reacting for 7 to 12 hours; And Method for producing an ultra-light-speed water-soluble coating waterproofing agent comprising five steps of mixing the alcohol mixture and polymer cement to 100 parts by weight of the four-step mixture. Water-soluble paint containing the coating film waterproofing agent of Claim 1. Concrete containing the film waterproofing agent of claim 1. The ready-mixed concrete containing the coating film waterproofing agent of Claim 1. Mortar containing the coating film waterproofing agent of Claim 1.