KR102271100B1 - Primer composition for improvement of adhesion between waterproofing sheet by synthetic resin and waterproofing material and complex waterproofing method to concrete constructions using the same - Google Patents

Abstract

The present invention relates to a primer composition for improving adhesion between a synthetic resin-based waterproof sheet and a coating film waterproof agent, and a composite waterproof construction method for concrete structure using same, the primer composition including: 100 parts by weight of an acrylic modified chlorinated polyolefin resin; 30-40 parts by weight of an aliphatic polyester-based polymeric carrier; 10-20 parts by weight of sorbiloxyalkylsilane; 12-18 parts by weight of octocinol; and 100-350 parts by weight of an organic solvent, wherein the aliphatic polyester polyester-based polymeric carrier, which includes isosobide and has an average diameter of 50-120 μm, and in which the average diameter of voids is 20-30 μm, is used, whereby the primer composition can provide not only adhesion between the synthetic resin-based waterproof sheet and polyurethane or polyurea coating film waterproof agent, but also coating film waterproof performance and durability performance.

Description

Primer composition for improving adhesion of synthetic resin waterproofing sheet and coating film waterproofing material, and composite waterproofing construction method of concrete structure using the same

The present invention provides a synthetic resin-based waterproof sheet and a polyurethane or polyurea coating film waterproofing material, as well as adhesion and compatibility, as well as coating film waterproofing performance and durability, a synthetic resin-based waterproofing sheet and a primer composition for improving adhesion of a coating film waterproofing material And it relates to a composite waterproofing construction method of a concrete structure using the same.

Recently, efforts have been made to improve materials and construction quality for waterproofing construction in order to secure and maintain safety and durability of waterproofing between floors, rooftops or basements of concrete structures. In general, the waterproofing methods mainly used in Korea are the asphalt waterproofing method, which has the longest history, the liquid waterproofing method that is applied or infiltrated into the base surface of the concrete structure, and the coating waterproofing using polyurethane, polyurea and acrylic rubber manufactured for waterproofing. A waterproofing method using a waterproofing sheet, such as waterproofing using a synthetic polymer-based sheet using a synthetic resin as a raw material, and the like are known.

The above-mentioned waterproofing methods have advantages and disadvantages according to each construction method, and the asphalt waterproofing method has construction inconveniences (fire, burns, etc.) due to the work that requires melting asphalt on the roof of a building, etc., and the size of the construction site is small and the cross-section is small. It is suitable for a short case, but in a large structure and a long span, if a crack occurs in the structure, the waterproofing layer is also damaged. Therefore, there is a problem that only a highly skilled worker must be depended on.

In addition, polyurethane or polyurea coating film waterproofing, which is the most widely used among coating film waterproofing methods, has elasticity against minor cracks, so it is possible to expose waterproofing, is easy to repair, and has relatively excellent chemical resistance such as chemical resistance and solvent resistance. , free coating thickness, etc., but polyurethane or polyurea waterproofing method is not suitable for wet conditions, insufficient primer application, poor latitude of concrete and poor surface treatment (lack of cleaning, damage, lack of drying), etc. As a result, swelling, lifting, peeling, etc. occur, resulting in a water leak, so there is a problem in that the life of the waterproof construction is shortened.

In addition, in the waterproofing method using the waterproofing sheet, the waterproofing or composite waterproofing method using a synthetic resin sheet has superior tensile strength, elongation, and tearing strength compared to coating film waterproofing, and has excellent response to structure behavior, crack followability and external impact. However, in the waterproofing method using the above-mentioned synthetic resin sheet, the connecting part between the two sheets is joined by an adhesive, heat welding, or solvent welding, etc., and the bonding method by adhesive or solvent welding is instantaneous. However, due to the high possibility of air entering the edges during the process, the sheet may be lifted, and after the lapse of time due to the repeated contraction and expansion of the waterproofing sheet due to the change in temperature during the construction process or after construction is completed. The adhesive strength is weakened, and there is a problem that detachment or lifting occurs at the joint of the waterproof sheet. The thermal fusion bonding method is limited by the ambient temperature and the working speed is not fast, and partial contact failure occurs due to long-time adhesion, There was a disadvantage that the work of a skilled person was required.

Therefore, by using the advantages of waterproofing polyurethane or polyurea coating films and the advantages of waterproofing synthetic resin sheets as described above, a synthetic resin-based waterproofing sheet is installed first, and then polyurethane or polyurea is applied on the installed synthetic resin-based waterproofing sheet. A composite waterproofing method of forming a polyurethane or polyurea waterproofing layer was used. However, synthetic resin films such as polyethylene (HDPE, LDPE, and LLDPE), polypropylene, PVC, and PET are mainly used as the synthetic resin-based waterproofing sheet. In particular, polyethylene (HDPE, LDPE and LLDPE) and polypropylene are polar groups. Since it is extremely inert because it does not have a primer, there was a problem of poor adhesion or compatibility with a waterproofing material for a polyurethane or polyurea coating film. Therefore, in the composite waterproofing method as described above, the airtightness of the connection part of the waterproofing sheet is not maintained, and not only the overall waterproofing performance is lowered, but also it is not attached to the bottom surface and a lifting phenomenon occurs, or wrinkles occur while drying. There was a problem.

Therefore, while providing the adhesiveness or compatibility between the synthetic resin-based waterproofing sheet and the polyurethane or polyurea coating waterproofing material as described above, a method that can provide coating film waterproofing performance and durable performance is emerging.

Republic of Korea Patent No. 10-1120785 Republic of Korea Patent No. 10-1236733 Republic of Korea Patent Registration No. 10-1275151 Republic of Korea Patent No. 10-1714473

The present invention has been devised to solve the above problems, and one embodiment of the present invention provides not only adhesion and compatibility between a synthetic resin-based waterproof sheet and a polyurethane or polyurea coating waterproofing material, but also coating film waterproofing performance and durability. An object of the present invention is to provide a primer composition for improving the adhesion of a synthetic resin-based waterproofing sheet and coating film waterproofing material that can provide up to

In addition, another embodiment of the present invention is to provide a composite waterproofing construction method of a concrete structure using the primer composition for improving the adhesion of the synthetic resin-based waterproofing sheet and the coating film waterproofing material.

Various problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

One embodiment of the present invention is 100 parts by weight of acryl-modified chlorinated polyolefin resin, 30 to 40 parts by weight of an aliphatic polyester-based polymer carrier, 10 to 20 parts by weight of sorbyloxyalkylsilane, 12 to 18 parts by weight of octocinol, and an organic solvent 100 to 350 parts by weight; The aliphatic polyester-based polymer carrier is one comprising child carbide; having an average diameter of 50 to 120 μm; the pores having an average diameter of 20 to 30 μm; Provided is a primer composition for improving adhesion of a synthetic resin-based waterproofing sheet and a coating waterproofing material having a porosity of 80 to 99%.

The aliphatic polyester-based polymer carrier comprises 1 to 10% by weight of an aliphatic polyester-based polymer, 0.5 to 7% by weight of child carbide, and 50 to 80% by volume of an organic phase containing the remaining amount of an organic solvent; 5 to 30% by weight of an effervescent salt of ammonium (bi)carbonate or sodium carbonate and 20 to 50% by volume of the first aqueous phase containing the remaining amount of distilled water; mixing to obtain a uniform W/O emulsion; and mixing the W / O emulsion with a second aqueous phase containing 0.1 to 0.5% by weight of a hydrophilic surfactant and the remaining amount of distilled water in a ratio of 1:10 to 20 by volume, and emulsifying it. can be used to be

The aliphatic polyester-based polymer is at least one selected from the group consisting of poly (caprolactone), poly (valerolactone), poly (hydroxy butyrate), poly (hydroxy valerate) and mixtures thereof; The organic solvent is a mixture of methylene chloride and cyclohexyl chloride in a weight ratio of 2: 1; The hydrophilic surfactant may be a mixture of polyvinylpyrrolidone and polyvinyl alcohol in a 1: 1 weight ratio.

The acrylic-modified chlorinated polyolefin resin has an acid value of 5 to 10 mg KOH/g-resin, and 100 parts by weight of an acid anhydride-modified chlorinated polyolefin resin having a chlorine content of 5 to 40 mass%, and 1 to 30 parts by weight of a hydroxyl monomer and (meta ) modified with 30 to 60 parts by weight of an acrylic acid ester monomer; The sorbyloxyalkylsilane may be γ-sorbyloxypropyltrimethoxysilane.

In addition, another embodiment of the present invention is a composite waterproofing construction method of a concrete structure using the primer composition for improving the adhesion of the synthetic resin-based waterproofing sheet and the coating film waterproofing material, the step of removing the deteriorated portion and foreign substances of the construction target of the concrete structure ; washing the surface of the construction object from which the deteriorated part and foreign substances are removed; Drying the surface of the construction target, and attaching a synthetic resin-based waterproofing sheet made of polyethylene, polypropylene, polyvinyl chloride (PVC) or polyethylene terephthalate (PET) according to the construction target; applying a primer composition for improving adhesion of the synthetic resin-based waterproofing sheet and the coating film waterproofing material to the surface of the attached synthetic resin-based waterproofing sheet; And coating and drying the polyurethane-based or polyurea-based coating waterproofing material on the upper surface of the primer composition for improving the adhesion of the applied synthetic resin-based waterproofing sheet and the coating film waterproofing material; provides a composite waterproofing construction method of a concrete structure comprising a.

According to the primer composition for improving the adhesion of the synthetic resin waterproof sheet and the coating film waterproofing material according to an embodiment of the present invention, and the composite waterproofing construction method of a concrete structure using the same, the synthetic resin waterproof sheet and the polyurethane or polyurea coating film waterproofing material It is possible to provide properties and compatibility, and there is an effect of improving adhesive properties such as initial adhesion, state adhesion, heat resistance adhesion, and water resistance adhesion. In addition, there is an effect of providing durability such as waterproof performance and impact resistance.

1 shows an actual image of an aliphatic polyester-based polymer carrier that can be used in the present invention.
Figure 2 shows a construction flow chart of the composite waterproof construction method of a concrete structure according to an embodiment of the present invention.
3 is a schematic cross-sectional view of a construction example constructed according to a method for constructing a composite waterproofing of a concrete structure according to an embodiment of the present invention.
Figure 4 shows a schematic cross-sectional view of a construction example constructed according to the composite waterproofing construction method of a concrete structure according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, this is provided as an example, and the present invention is not limited thereto, and the present invention is only defined by the scope of the claims to be described later.

One embodiment of the present invention is 100 parts by weight of acryl-modified chlorinated polyolefin resin, 30 to 40 parts by weight of an aliphatic polyester-based polymer carrier, 10 to 20 parts by weight of sorbyloxyalkylsilane, 12 to 18 parts by weight of octocinol, and an organic solvent 100 to 350 parts by weight; The aliphatic polyester-based polymer carrier is one comprising child carbide; having an average diameter of 50 to 120 μm; the pores having an average diameter of 20 to 30 μm; Provided is a primer composition for improving adhesion of a synthetic resin-based waterproofing sheet and a coating film waterproofing material having a porosity of 80 to 99%.

According to the primer composition for improving the adhesion of the synthetic resin waterproof sheet and the coating film waterproofing material according to an embodiment of the present invention, and the composite waterproofing construction method of a concrete structure using the same, the synthetic resin waterproof sheet and the polyurethane or polyurea coating film waterproofing material It is possible to provide properties and compatibility, and there is an effect of improving adhesive properties such as initial adhesion, state adhesion, heat resistance adhesion, and water resistance adhesion. In addition, there is an effect of providing durability such as waterproof performance and impact resistance.

The primer composition for improving the adhesion of the synthetic resin-based waterproofing sheet and coating film waterproofing material according to an embodiment of the present invention is 100 parts by weight of an acrylic-modified chlorinated polyolefin resin, 30 to 40 parts by weight of an aliphatic polyester-based polymer carrier, and 10 to 40 parts by weight of sorbyloxyalkylsilane. By including 20 parts by weight, 12 to 18 parts by weight of octocinol, and 100 to 350 parts by weight of an organic solvent, the above-described effect can be realized.

More specifically, the acrylic-modified chlorinated polyolefin resin functions to provide excellent adhesive properties to the synthetic resin-based waterproofing sheet and the polyurethane or polyurea coating waterproofing material.

This acrylic-modified chlorinated polyolefin resin has an acid value of 5 to 10 mg KOH/g-resin, and 100 parts by weight of an acid anhydride-modified chlorinated polyolefin resin having a chlorine content of 5 to 40 mass%, and 1 to 30 parts by weight of a hydroxyl monomer and (meta ) By using the acrylic acid ester monomer modified with 30 to 60 parts by weight, the above-described effect can be further improved.

At this time, the acid anhydride-modified chlorinated polyolefin resin is obtained by graft polymerization of an acid anhydride to one or more selected from the group consisting of polyethylene, polypropylene, propylene-α-olefin copolymer, and mixtures thereof. have.

The propylene-α-olefin copolymer is obtained by copolymerizing α-olefin with a propylene main chain. Non-limiting examples of the α-olefin include at least one selected from the group consisting of ethylene, 1-butene, 1-heptene, 1-octene, 4-methyl-1-pentene, vinyl acetate, and mixtures thereof. Can be used. As the more preferable α-olefin, ethylene or 1-butene may be used. The ratio of the propylene component to the α-olefin component of the propylene-α-olefin copolymer is not particularly limited, but it is more preferable that the propylene component is 50 to 70 mol% and the α-olefin component is 50 to 30 mol%. can be used

In addition, non-limiting examples of the acid anhydride include itaconic anhydride, glutaric anhydride, citraconic anhydride, phthalic anhydride, methylnadic anhydride, succinic anhydride, maleic anhydride, pyromellitic anhydride, 1, At least one selected from the group consisting of 2-dicyclohexanedicarboxylic acid and mixtures thereof may be used. As the more preferable acid anhydride, maleic anhydride or itaconic anhydride may be used.

The acid anhydride-modified chlorinated polyolefin resin has an acid value of 5 to 10 mg KOH/g-resin, and a chlorine content of 5 to 40 mass% can be preferably used. If the acid value of the acid anhydride-modified chlorinated polyolefin resin is too low, adhesive strength may not be sufficiently expressed or crosslinking density may be lowered, and if the acid value of the acid anhydride-modified chlorinated polyolefin resin is too high There is a problem that the viscosity or stability of the primer composition for improving the adhesion of the synthetic resin-based waterproofing sheet and the coating film waterproofing material according to an embodiment of the present invention may be reduced. When the chlorine content of the acid anhydride-modified chlorinated polyolefin resin is too low, there is a problem that adhesive strength may not be sufficiently expressed, and when the chlorine content of the acid anhydride-modified chlorinated polyolefin resin is too high, additional adhesive strength improvement effect There is a problem that cannot be expected.

In addition, non-limiting examples of the hydroxyl monomer include 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate ( At least one selected from the group consisting of 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, or 4-hydroxybutyl acrylate and mixtures thereof may be used. have.

The hydroxyl monomer is preferably included in an amount of 1 to 30 parts by weight based on 100 parts by weight of the acid anhydride-modified chlorinated polyolefin resin. If the content of the hydroxyl monomer is too small, there is a problem that the adhesive strength may not be sufficiently expressed. If the content of the hydroxyl monomer is too large, an additional effect of improving the adhesive strength cannot be expected, and storage stability and weather resistance may be reduced. There are possible problems.

In addition, non-limiting examples of the (meth)acrylic acid ester, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate, isobutyl acrylate, isobutyl Methacrylate, ethylhexyl acrylate, ethylhexyl methacrylate, methoxyethyl acrylate, methoxyethyl methacrylate, butoxyethyl acrylate, butoxyethyl methacrylate, cyclohexyl methacrylate, cyclohexyl acrylic At least one selected from the group consisting of lactate, isobornyl acrylate, isobornyl methacrylate, isodecyl acrylate, isodecyl methacrylate, and mixtures thereof may be used.

The (meth)acrylic acid ester is preferably included in an amount of 30 to 60 parts by weight based on 100 parts by weight of the acid anhydride-modified chlorinated polyolefin resin. When the content of the (meth)acrylic acid ester is too small, there is a problem that the adhesive strength may not be sufficiently expressed, and when the content of the (meth)acrylic acid ester is too large, an additional adhesive strength improvement effect cannot be expected, and the synthetic resin There is a problem that the compatibility of the waterproofing sheet and the polyurethane or polyurea coating waterproofing material may be reduced.

On the other hand, the aliphatic polyester-based polymer carrier supports the other components of the primer composition for improving the adhesion of the synthetic resin-based waterproofing sheet and the coating film waterproofing material according to an embodiment of the present invention, thereby providing a synthetic resin-based waterproofing sheet and a polyurethane or polyurea coating film. It functions to provide very good adhesion and compatibility with waterproofing materials. Accordingly, not only the improvement of adhesive properties such as initial adhesion, state adhesion, heat-resistance adhesion, water-resistance adhesion, etc., but also the integrity of the synthetic resin-based waterproof sheet and the polyurethane or polyurea coating film waterproofing material is improved, so that the coating film waterproofing performance, mechanical strength, and water resistance , there is an effect that can improve the durability performance such as weather resistance, heat resistance, impact resistance.

The aliphatic polyester-based polymer carrier is a stable spherical microcarrier, which includes child carbide; having an average diameter of 50 to 120 μm; the pores having an average diameter of 20 to 30 μm; By using a porosity of 80 to 99%, the above-described effect can be further improved. An actual image of the aliphatic polyester-based polymer carrier that can be used in the present invention is shown in FIG. 1 .

More specifically, the aliphatic polyester-based polymer carrier comprises 1 to 10% by weight of an aliphatic polyester-based polymer, 0.5 to 7% by weight of child carbide, and 50 to 80% by volume of an organic phase containing the remaining amount of an organic solvent; 5 to 30% by weight of an effervescent salt of ammonium (bi)carbonate or sodium carbonate and 20 to 50% by volume of the first aqueous phase containing the remaining amount of distilled water; mixing to obtain a uniform W/O emulsion; and mixing the W / O emulsion with a second aqueous phase containing 0.1 to 0.5% by weight of a hydrophilic surfactant and the remaining amount of distilled water in a ratio of 1:10 to 20 by volume, and emulsifying it. can be used to be

In this case, non-limiting examples of the aliphatic polyester-based polymer include poly (caprolactone), poly (valerolactone), poly (hydroxy butyrate), poly (hydroxy valerate) and mixtures thereof. One or more types selected from may be used. In addition, the aliphatic polyester-based polymer may preferably have a mass average molecular weight of 1,000 to 200,000. When the mass average molecular weight of the aliphatic polyester-based polymer is too small, the strength of the aliphatic polyester-based polymer carrier is lowered, so that the above-described improvement effect may be insufficient, and the mass average molecular weight of the aliphatic polyester-based polymer is When it is too large, the porosity of the aliphatic polyester-based polymer carrier is small, and the other components of the primer composition for improving the adhesion of the synthetic resin-based waterproofing sheet and the coating waterproofing material according to an embodiment of the present invention cannot be sufficiently supported. There is a problem that the effect may be reduced.

In addition, the child carbide is an anhydrosugar _{alcohol in the form of a diol obtained by dehydrating sorbitol, a C 6} sugar alcohol, and is a child carbide derived from a plant (that is, a child carbide obtained by dehydrating sorbitol derived from starch). can be preferably used.

In addition, as the organic solvent, an organic chloride compound can be preferably used. Non-limiting examples of the organic solvent include n-propyl chloride, cyclohexyl chloride, methyl chloride. ), methylene chloride, benzyl chloride, and at least one selected from the group consisting of mixtures thereof may be used. In particular, by using a mixture of methylene chloride and cyclohexyl chloride in a weight ratio of 2: 1 as the organic solvent, excellent durability can be imparted even to a high porosity.

In addition, the effervescent salt of ammonium (bi) carbonate or sodium carbonate has a function that the aliphatic polyester-based polymer carrier has a high porosity, excellent inter-pore connectivity, and open pores to the outside, and a stable spherical microcarrier can be formed. do

In addition, when forming the uniform W / O emulsion, when the effervescent salt dissolved in water is added to the organic phase and stirred at a high speed of 5000 to 8000 rpm for 2 to 3 minutes, ammonia and carbon dioxide from the first aqueous solution phase as a dispersoid The gas is bubbled into the organic phase to surround the dispersed water droplets, and to prevent aggregation of the water droplets to obtain a W/O emulsion in which the first aqueous phase is uniformly dispersed.

At this time, the volume of the added first aqueous phase cannot exceed the volume of the organic phase, and in order to obtain a stable spherical microcarrier, the ratio of the first aqueous phase is preferably in the range of 20 to 50% by volume. If the content of the first aqueous phase is too large, it is difficult to obtain a stable emulsion, and there is a problem that the shape of the final prepared microcarrier may be very non-uniform. According to the concentration of the effervescent salt and the volume of the aqueous phase to be added, the concentration of the gas produced can be adjusted, thereby controlling the structure of the pores.

Then, in the second emulsification step, the W / O emulsion stabilized by the foaming is dispersed and emulsified in an aqueous solution containing 10 to 20 times the volume of the hydrophilic surfactant as the second aqueous phase. At this time, the stirring speed is applicable in the range of 100 to 300 rpm, but the selection of the stirring speed depends on the size of the reaction vessel. A porous particulate carrier having pores open to the outside is formed through the process in which the gas inside the dispersed W/O emulsion is released into the second aqueous solution phase and the polyester-based polymer is cured as the organic solvent is evaporated/removed . It is naturally precipitated to remove the surfactant with excess secondary distilled water, and after freezing at -70°C, the particulate carrier can be collected by vacuum drying.

In this case, non-limiting examples of the hydrophilic surfactant include polyvinyl pyrrolidone, polyvinyl methyl ether, polyethyleneimine, polyacrylic acid, polyvinyl alcohol, vinyl acetate copolymer, C1 to C5 alkyl cellulose, hydroxypropyl At least one selected from the group consisting of cellulose, cetyltrimethyl ammonium bromide, sodium dodecyl sulfate, polyoxyethylene sorbitan monooleate, and mixtures thereof may be used. In particular, the hydrophilic surfactant is a mixture of polyvinylpyrrolidone and polyvinyl alcohol in a 1: 1 weight ratio, and has an effect of providing excellent durability even with a high porosity.

The aliphatic polyester-based polymer carrier is preferably included in an amount of 30 to 40 parts by weight based on 100 parts by weight of the acrylic-modified chlorinated polyolefin resin. When the content of the aliphatic polyester-based polymer carrier is too small, the compatibility between the synthetic resin-based waterproof sheet and the polyurethane or polyurea coating film waterproofing material is lowered, so that adhesive strength and durability may not be sufficiently expressed. When the content of the polyester-based polymer carrier is too large, there is a problem that an additional adhesive strength improvement effect cannot be expected, and price competitiveness may be lowered.

In addition, the sorbyloxyalkylsilane has an effect of improving durability such as excellent adhesion performance, mechanical strength, weather resistance, and impact resistance. The sorbyloxyalkylsilane may be more preferably γ-sorbyloxypropyltrimethoxysilane.

The sorbyloxyalkylsilane is preferably included in an amount of 10 to 20 parts by weight based on 100 parts by weight of the acrylic-modified chlorinated polyolefin resin. When the content of the sorbyloxyalkylsilane is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the sorbyloxyalkylsilane is too large, an additional adhesive strength improvement effect cannot be expected, and the price There is a problem that may reduce competitiveness.

In addition, the octocinol functions to provide very good compatibility between the synthetic resin-based waterproofing sheet and the polyurethane or polyurea coating film waterproofing material. In addition, the octocinol is a synthetic resin-based waterproofing sheet by allowing other components of the primer composition for improving the adhesion of the synthetic resin-based waterproofing sheet and the coating film waterproofing material according to an embodiment of the present invention to be easily loaded on the aliphatic polyester-based polymer carrier. It has the effect of greatly improving the durability of the coating film waterproofing performance, mechanical strength, water resistance, weather resistance, heat resistance, and impact resistance by improving the integrity with the polyurethane or polyurea coating film waterproofing material.

The octocinol is preferably included in an amount of 12 to 18 parts by weight based on 100 parts by weight of the acrylic-modified chlorinated polyolefin resin. When the content of octocinol is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of octocinol is too large, an additional effect of improving adhesive strength cannot be expected, and mechanical strength is rather reduced. Or there is a problem that may lower price competitiveness.

In addition, the organic solvent contained in the primer composition for improving the adhesion of the synthetic resin-based waterproofing sheet and the coating film waterproofing material functions to improve the solution viscosity or viscosity stability of the composition. The organic solvent is at least one selected from the group consisting of methylcyclohexane, methylethylketone, cyclohexane, acetone, ethyl acetate, cyclohexanol, isopropanol, n-propanol, ethanol, and mixtures thereof; The above-described effect can be further improved by using a mixture of an aromatic hydrocarbon organic solvent in a ratio of 1: 5 to 10 by weight. In this case, non-limiting examples of the aromatic hydrocarbon organic solvent may be at least one selected from the group consisting of toluene, xylene, cocosol, and mixtures thereof.

The organic solvent is preferably included in an amount of 100 to 350 parts by weight based on 100 parts by weight of the acrylic-modified chlorinated polyolefin resin. When the content of the organic solvent is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the organic solvent is too large, there is a problem that adhesive strength and mechanical strength may be lowered.

On the other hand, another embodiment of the present invention is a composite waterproofing construction method of a concrete structure using the primer composition for improving the adhesion of the synthetic resin-based waterproofing sheet and the coating film waterproofing material. removing; washing the surface of the construction object from which the deteriorated part and foreign substances are removed; Drying the surface of the construction target, and attaching a synthetic resin-based waterproofing sheet 200 made of polyethylene, polypropylene, polyvinyl chloride (PVC) or polyethylene terephthalate (PET) according to the construction target step; applying a primer composition 100 for improving adhesion between the synthetic resin-based waterproofing sheet and the coating film waterproofing material on the surface of the attached synthetic resin-based waterproofing sheet; And coating and drying the polyurethane-based or polyurea-based coating waterproofing material 300 on the upper surface of the primer composition for improving the adhesion of the applied synthetic resin-based waterproofing sheet and the coating film waterproofing material; providing a composite waterproofing construction method of a concrete structure comprising a do. The construction flowchart of the composite waterproofing construction method of a concrete structure according to an embodiment of the present invention is shown in FIG. 2 .

More specifically, the step of removing the deteriorated part and foreign substances of the construction target of the concrete structure physically removes the foreign substances attached to the surface of the construction target of the concrete structure, smooths the surface to adjust the base, and the surface is cracked. If there is a damaged part, the surface of the concrete structure is cleaned up by V-cutting or grinding and then filling with a sealing agent. At this time, when the construction target of the concrete structure is a floor, the floor is arranged neatly and sufficiently dried to achieve a good water gradient, and foreign substances such as oil and rust are removed and cleaned.

In addition, the surface of the construction target is dried, and a synthetic resin-based waterproofing sheet 200 made of polyethylene, polypropylene, polyvinyl chloride (PVC) or polyethylene terephthalate (PET) according to the construction target is prepared. In the attaching step, the one or more synthetic resin-based waterproof sheets 200 are in contact with each other to form the same plane, and are in contact with the surface of the construction target. At this time, a minute gap is formed in the contact portion of the one or more synthetic resin-based waterproof sheets 200 in contact with each other. The minute gap may be sealed and waterproofed so as not to be exposed to the external environment by the steps to be described later.

In addition, the primer composition 100 for improving the adhesion of the synthetic resin-based waterproofing sheet and the coating film waterproofing material is applied to the surface of the attached synthetic resin-based waterproofing sheet.

Thereafter, the polyurethane-based or polyurea-based coating waterproofing material 300 is applied to the upper surface of the primer composition for improving the adhesion of the applied synthetic resin-based waterproofing sheet and the coating film waterproofing material.

At this time, the primer composition 100 for improving the adhesion of the synthetic resin-based waterproofing sheet and the coating film waterproofing material comprises: the synthetic resin-based waterproofing sheet; This is to protect the concrete structure from the external environment by improving the adhesion of the polyurethane-based or polyurea-based coating film waterproofing material 300 . Accordingly, the primer composition 100 for improving the adhesion of the synthetic resin-based waterproofing sheet and the coating film waterproofing material and the polyurethane-based or polyurea-based coating film waterproofing material 300 are formed on all surfaces of the construction target of the concrete structure, as shown in FIG. 3 . can do. In addition, as shown in FIG. 4, for the purpose of sealing and waterproofing only the minute gap between the one or more synthetic resin-based waterproof sheets 200, it may be formed only on some surfaces of the construction target of the concrete structure. have.

According to the primer composition for improving the adhesion of the synthetic resin waterproof sheet and the coating film waterproofing material according to an embodiment of the present invention, and the composite waterproofing construction method of a concrete structure using the same, the synthetic resin waterproof sheet and the polyurethane or polyurea coating film waterproofing material It is possible to provide properties and compatibility, and there is an effect of improving adhesive properties such as initial adhesion, state adhesion, heat resistance adhesion, and water resistance adhesion. In addition, there is an effect of providing durability such as waterproof performance and impact resistance.

As mentioned above, although preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various modifications can be made by those skilled in the art within the scope of the technical spirit of the present invention. This is possible.

<Preparation Example 1-1>

Preparation of acrylic modified chlorinated polyolefin resin

100 parts by weight of maleic anhydride-modified chlorinated polyolefin resin having an acid value of 7 mg KOH/g-resin and a chlorine content of 20% by mass and toluene in a 2L round reaction vessel equipped with a cooling tube, nitrogen introduction tube, thermometer, and stirrer A weight part was added and the temperature was raised to 100 °C.

In addition, in a separate dropping tank, 5 parts by weight of 2-hydroxyethyl acrylate, 9 parts by weight of cyclohexyl methacrylate, 0.6 parts by weight of t-butyl methacrylate, 21 parts by weight of isobornyl acrylate, and 2-ethylhexyl acrylic After mixing 7.5 parts by weight of the rate with 0.3 parts by weight of benzoyl peroxide, the mixture was uniformly added dropwise to the reaction vessel over 4 hours. Upon completion of the dropping, the mixture was aged for 2 hours, cooled, and the reaction was terminated by adding toluene.

The viscosity of the thus obtained acrylic-modified chlorinated polyolefin resin was Gardner's viscosity Z1 and solid content of 40.6%.

<Preparation Example 1-2>

Preparation of acrylic modified chlorinated polyolefin resin

In a separate dropping tank, 21 parts by weight of 2-hydroxyethyl acrylate, 7 parts by weight of cyclohexyl methacrylate, 5 parts by weight of t-butyl methacrylate, 15 parts by weight of isobornyl acrylate, 18 parts by weight of 2-ethylhexyl acrylate After mixing parts by weight with 0.3 parts by weight of benzoyl peroxide, a krill-modified chlorinated polyolefin resin was prepared in the same manner as in Preparation Example 1-1, except that the mixture was uniformly dropped into the reaction vessel over 4 hours.

The viscosity of the thus obtained acrylic-modified chlorinated polyolefin resin was Gardner's viscosity Z2 and solid content of 40.9%.

<Preparation Example 2-1>

Preparation of aliphatic polyester-based polymer carrier

8% by weight of poly(caprolactone) (mass average molecular weight: 17,000), 5% by weight of child carbide and the remaining amount of an organic solvent (a mixture of methylene chloride and cyclohexyl chloride in a 2: 1 weight ratio) were mixed, and the organic phase was prepared.

Separately, a first aqueous phase comprising 9% by weight of ammonium (bi)carbonate effervescent salt and the remainder of distilled water was prepared.

After mixing 75% by volume of each prepared organic phase and 25% by volume of the first aqueous phase, emulsification was performed at 5,700 rpm for 2 minutes using a homogenizer, thereby obtaining a uniform W/O emulsion.

The W / O emulsion was mixed with a second aqueous phase containing 0.5 wt% of a hydrophilic surfactant mixed with polyvinylpyrrolidone and polyvinyl alcohol in a 1: 1 weight ratio and the remainder of distilled water in a 1: 17 volume ratio. Then, it was emulsified at 200 rpm for 4 hours using a propeller-type stirrer.

After the organic solvent was evaporated, the fine carrier was precipitated, washed three times with secondary distilled water, and then frozen at -70°C and vacuum dried to collect the aliphatic polyester-based polymer fine carrier.

The aliphatic polyester-based polymer carrier thus prepared had an average diameter of 113 μm; the mean diameter of the pores is 22 μm; The porosity was 87%.

<Preparation Example 2-2>

Preparation of aliphatic polyester-based polymer carrier

Poly(caprolactone) 3% by weight (mass average molecular weight: 17,000), poly(valerolactone) 5% by weight (mass average molecular weight: 23,000), isosorbide 0.9% by weight and the balance of the organic solvent (methylene chloride and cyclohexyl) Chloride was mixed in a 2: 1 weight ratio) to prepare an aliphatic polyester-based polymer microcarrier in the same manner as in Preparation Example 2-1, except that an organic phase was prepared.

The aliphatic polyester-based polymer carrier thus prepared had an average diameter of 88 μm; The average diameter of the pores is 26 μm; The porosity was 93%.

<Examples 1 to 3>

As shown in Table 1 below, acrylic modified chlorinated polyolefin resin, aliphatic polyester-based polymer carrier, γ-sorbyloxypropyltrimethoxysilane, octocinol, and cyclohexane, isopropanol and toluene were mixed with 10: 3: 87 weight. By mixing the organic solvent mixed in the ratio, a primer composition for improving the adhesion of the synthetic resin-based waterproofing sheet and the coating film waterproofing material was prepared.

<Comparative Example 1>

As shown in Table 1 below, a comparative primer composition was prepared by mixing the acrylic-modified chlorinated polyolefin resin with an organic solvent in which cyclohexane, isopropanol and toluene were mixed in a weight ratio of 10: 3: 87.

(parts by weight) Example 1 Example 2 Example 3 Comparative Example 1 Acrylic Modified Chlorinated Polyolefin Resin 100
(Preparation Example 1-1) 100
(Preparation Example 1-2) 100
(Preparation Example 1-2) 100
(Preparation Example 1-1) Aliphatic polyester-based polymer carrier 32
(Preparation Example 2-1) 32
(Preparation Example 2-1) 38
(Preparation Example 2-2) 0 γ-Sorbyloxypropyltrimethoxysilane 15 17 11 0 octocinol 12 15 18 0 organic solvent 290 290 290 250

<Test Example>

test specimen preparation

On each separately prepared PVC substrate, the primer composition for improving the adhesion of the synthetic resin waterproof sheet and the coating film waterproofing material prepared in Examples 1 to 3 and the comparative primer composition prepared in Comparative Example 1 were respectively applied and dried naturally for 5 minutes. , by coating and drying a separately prepared polyurethane-based coating film waterproofing material thereon, a test body for physical property evaluation was prepared.

Evaluation items and methods

end. Initial Adhesion Evaluation: Based on ASTM D3359 (Cross-hatch test), adhesive strength was evaluated for the prepared test body.

I. State adhesion evaluation: After the prepared test body was left at room temperature for 24 hours, adhesion was evaluated according to ASTM D3359 (Cross-hatch test).

All. Evaluation of Heat Resistance Adhesion: After the prepared test body was left at 80° C. for 168 hours, adhesive strength was evaluated according to ASTM D3359 (Cross-hatch test).

la. Water-resistant adhesive strength evaluation: After leaving the prepared test body at 50° C. and 95% humidity for 168 hours, the adhesive strength was evaluated according to ASTM D3359 (Cross-hatch test).

hemp. Abrasion resistance evaluation: Using a Taber abraser (manufacturer: Gardoco, device name: 5135), the prepared specimen was abraded 500 times with a CS-10F abrasion wheel and a load of 500 g. The haze difference (ΔHaze, unit: %) before and after abrasion was measured using a haze meter (Haze-meter, manufactured by Nippon Denshoku, device name: NDH 5000) to evaluate the abrasion resistance.

bar. Weatherability evaluation: After storing the prepared test specimen under SAE J1960 standard conditions for 1,000 hours using a weatherometer (weatherometer, manufacturer: Atlas Corporation, device name: Ci4000), appearance evaluation and yellow index change (ΔYI) were measured. In the appearance evaluation, it was determined that the case where delamination or cracking did not occur at all on the entire surface of the specimen was OK, and the case where even a little occurred was found to be a crack. In addition, the yellow index change is measured using a Spectrophotometer (manufacturer: Konica-Minolta, device name: CM-3600d) to measure the yellow index (YI) value of the specimen before and after the light resistance test, and calculate the difference in the yellow index before and after the light resistance test got it

four. Storage stability evaluation: After leaving the primer composition for improving adhesion of the synthetic resin waterproof sheet and coating film waterproofing material prepared in Examples 1 to 3 and the comparative primer composition prepared in Comparative Example 1 at 60° C. for 168 hours, a Gardner viscometer was used to measure the viscosity, and the storage stability was evaluated.

Good (◎): Viscosity increase rate within 10%

Normal (○): Viscosity increase rate within 20%

Defect (×): Viscosity increase rate over 20%

Evaluation results

Results according to the evaluation items and evaluation methods are shown in Table 2 below.

division Example 1 Example 2 Example 3 Comparative Example 1 initial adhesion 5B 5B 5B 4B state adhesion 5B 5B 5B 5B heat-resistant adhesion 5B 5B 5B 3B water resistance 5B 5B 5B 3B wear resistance
(ΔHaze) 1.7 2.1 1.9 4.1 weather resistance
(Appearance/ △ YI) OK/
0.4 OK/
0.8 OK/
0.7 Crack/
4.4 storage stability ◎ ◎ ◎ ○

As can be seen in Table 2, in the case of the test body using the primer composition for improving the adhesion of the synthetic resin waterproof sheet and the coating film waterproofing material prepared in Examples 1 to 3, the test body using the comparative primer composition prepared in Comparative Example 1 Compared with , it was confirmed that the adhesive properties of initial adhesion, state adhesion, heat-resistance adhesion, and water-resistance adhesion were excellent.

In addition, in the case of the test body using the primer composition for improving the adhesion of the synthetic resin waterproof sheet and the coating film waterproofing material prepared in Examples 1 to 3, compared to the test body using the comparative primer composition prepared in Comparative Example 1, excellent abrasion resistance, It was confirmed that it has weather resistance and storage stability.

As described above, those skilled in the art to which the present invention pertains will understand that the present invention may be implemented in other specific forms without changing the technical spirit or essential characteristics thereof. Therefore, it should be understood that all of the embodiments described above are illustrative and not restrictive. The scope of the present invention should be construed as being included in the scope of the present invention, rather than the above detailed description, all changes or modifications derived from the meaning and scope of the claims described below and their equivalents.

100: Primer composition for improving adhesion of synthetic resin-based waterproofing sheets and coating film waterproofing materials
200: synthetic resin waterproof sheet
300: polyurethane-based or polyurea-based coating film waterproofing material
400: concrete structure

Claims (5)

100 parts by weight of acryl-modified chlorinated polyolefin resin, 30 to 40 parts by weight of an aliphatic polyester-based polymer carrier, 10 to 20 parts by weight of sorbyloxyalkylsilane, 12 to 18 parts by weight of octocinol, and 100 to 350 parts by weight of an organic solvent ;
The aliphatic polyester-based polymer carrier is one comprising child carbide; having an average diameter of 50 to 120 μm; the pores having an average diameter of 20 to 30 μm; a porosity of 80 to 99%;
The aliphatic polyester-based polymer carrier is
Poly(caprolactone), poly(valerolactone), and at least one selected from the group consisting of mixtures thereof, and 1 to 10% by weight of an aliphatic polyester-based polymer having a mass average molecular weight of 1,000 to 200,000, child carbide 0.5 50 to 80% by volume of an organic phase containing 7% to 7% by weight and the remaining amount of an organic solvent; 5 to 30% by weight of an effervescent salt of ammonium (bi)carbonate or sodium carbonate and 20 to 50% by volume of the first aqueous phase containing the remaining amount of distilled water; mixing to obtain a uniform W/O emulsion; and mixing the W / O emulsion with a second aqueous phase containing 0.1 to 0.5% by weight of a hydrophilic surfactant and the remaining amount of distilled water in a volume ratio of 1: 10 to 20, and emulsifying it. A primer composition for improving adhesion of a synthetic resin-based waterproofing sheet and a coating film waterproofing material, characterized in that it is
delete According to claim 1,
The organic solvent is a mixture of methylene chloride and cyclohexyl chloride in a weight ratio of 2: 1;
The hydrophilic surfactant is polyvinylpyrrolidone and polyvinyl alcohol in a 1: 1 weight ratio of a synthetic resin-based waterproof sheet and a primer composition for improving adhesion of a waterproofing coating film.
According to claim 1,
The acrylic modified chlorinated polyolefin resin is
100 parts by weight of an acid anhydride-modified chlorinated polyolefin resin having an acid value of 5 to 10 mg KOH/g-resin and a chlorine content of 5 to 40 mass%, 1 to 30 parts by weight of a hydroxyl group monomer and 30 to 60 parts by weight of a (meth)acrylic acid ester monomer modified in parts by weight;
The sorbyloxyalkylsilane is γ-sorbyloxypropyltrimethoxysilane, a synthetic resin-based waterproofing sheet and a primer composition for improving adhesion of a coating waterproofing material.
As a composite waterproofing construction method of a concrete structure using the primer composition for improving the adhesion of the synthetic resin-based waterproofing sheet and the coating film waterproofing material according to any one of claims 1, 3 and 4,
removing the deteriorated part and foreign substances of the construction target of the concrete structure; washing the surface of the construction object from which the deteriorated part and foreign substances are removed; Drying the surface of the construction target, and attaching a synthetic resin-based waterproofing sheet made of polyethylene, polypropylene, polyvinyl chloride (PVC) or polyethylene terephthalate (PET) according to the construction target; applying a primer composition for improving adhesion of the synthetic resin-based waterproofing sheet and the coating film waterproofing material to the surface of the attached synthetic resin-based waterproofing sheet; and coating and drying a polyurethane-based or polyurea-based coating waterproofing material on the upper surface of the primer composition for improving the adhesion of the applied synthetic resin-based waterproofing sheet and the coating film waterproofing material.

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