KR102059640B1 - Aqueous acryl waterproof material and method for constructing waterproof structure using the same - Google Patents

Abstract

Disclosed by the present invention is an aqueous acrylic waterproof material which includes: 40 to 55 wt% of water-soluble acrylic copolymer; 1 to 3 wt% of 2,2,4-trimethyl-1,3-pentanediol; 10 to 25 wt% of calcium carbonate; 5 to 10 wt% of iron oxide particles; 5 to 15 wt% of titanium dioxide particles; 5 to 15 wt% of a heat conduction resistance material; 0.1 to 3 wt% of a light reflective material which has a plate shape, includes at least one selected from a group consisting of gold, silver, platinum, aluminum, copper, nickel, zeolite, and kaolin, has a ratio of an area to a thickness to be 50 or more, has a ratio of a long axis to a short axis to be 0.7 to 1.5, and has a length of the long axis to be 1 to 50 μm; and 0.01 to 3 wt% of a metal-based corrosion inhibitor which has a wire shape having the length of 1 to 500 μm and the diameter of 0.02 to 0.1 μm. The present invention provides excellent waterproof properties and is environmentally friendly.

Description

Aqueous acrylic waterproofing material and waterproof construction method using same {AQUEOUS ACRYL WATERPROOF MATERIAL AND METHOD FOR CONSTRUCTING WATERPROOF STRUCTURE USING THE SAME}

The present invention relates to a waterproof material, and more particularly, to an aqueous acrylic waterproof material and a waterproof construction method using the same.

In general, as the summer and winter are repeated every year, freezing or corrosion of permeated water due to temperature changes, and deterioration due to air and light are necessary, so that waterproof construction for moisture and heat shielding is essential.

In addition, in the maintenance of the building, the waterproofing work should be repaired after removing the existing waterproofing layer, and the liquid waterproofing is as much as the permeation depth of the permeate in the process of repeating the thawing from the frozen state because the permeate is permeated from the surface layer to 1-3mm. Since the exterior is corroded, work should be done after removing rust or corrosion.

Waterproofing works for this purpose include asphalt waterproofing method, sheet waterproofing method, coating film waterproofing method, urethane waterproofing method, and composite waterproofing method in which each of them is laminated according to the building part, constituent material or waterproofing material according to the situation. .

Asphalt waterproofing method has been used for the longest time, waterproof, but the use of sand or sheet paper to prevent the flow of asphalt oil, and goes through a complicated process of applying heat, there is a problem that the construction is complicated, inconvenient and expensive construction costs.

Sheet waterproofing method is to form a waterproof layer by manufacturing a synthetic rubber and the like to a sheet having a certain thickness and width to adhere to the waterproof surface at the construction site. The manufacturing of the sheet is easy to implement the necessary properties through the various laminated structure, there is an advantage that the construction is convenient, but the construction is difficult to complex parts, there is a problem that the water tightness in the joint between the sheets is inferior, and manual work for watertightness is required.

Coating waterproofing method mainly uses epoxy, urethane, acrylic resin or asphalt as a main material, the organic solvent is mixed as a diluent. However, volatile organic solvents such as VOC and formaldehyde are used, which is harmful to the human body, has a bad smell, is not environmentally friendly, and is flammable, which is dangerous.

The urethane waterproofing method is to arrange the bottom of the part to be constructed, apply a primer to it, sufficiently penetrate and dry it, and then apply a liquid urethane resin to the bottom to form a urethane coating to obtain a waterproofing effect. It has good adhesion with concrete surface and has excellent elasticity, so it has the advantage of maintaining waterproofness to some extent.However, it is difficult to solve the fundamental problem when crack occurs due to the method of close contact with the floor surface, severe temperature change, moisture evaporation of concrete, floor In the case of cracking of concrete, swelling may occur or the constructed urethane coating film may be damaged, and a continuous lifting phenomenon may occur, thereby deteriorating waterproofness and durability of the building.

In the related art, Patent Document 1 has a thermal insulation effect of about 3 to 5 ° C. by preparing water, a dispersant, a synthetic resin, iron oxide, a lightweight ceramic, a mica, and a thickener in order to prepare a one-component elastic thermal insulation waterproofing material. The present invention discloses a composition of an elastic thermal insulation waterproof material and a method of producing the same, which are well-permeable, have no water, and have no odor and no mold.

However, the above-described prior art has a certain degree of waterproof performance, but the corrosion resistance and durability is inferior, and the heat shielding and heat insulating performance is not good, so that the inside of the building of the external heat and the outside of the building of the internal heat is easily discharged, and energy is wasted There is a problem that the efficiency is lowered, the heat island effect in the city is intensified.

In addition, various materials such as concrete, metal, asphalt shingles, roof tiles, and slate are used for the roof and floor materials of the building, and heat and moisture can be controlled to ensure long-term durability of the building by securing the life and waterproof performance of these materials. It should be possible.

Conventional concrete floor finishing method is to maintain the surface of the concrete floor without any finishing, or polish the surface to grind and smooth the surface after applying a predetermined reinforcement, polish, and then polish again Or the method of apply | coating a functional coating agent to the surface of a floor was used.

At present, the method of reinforcing the surface of the building floor by applying a functional coating agent (surface reinforcing agent) on the floor is presented by various methods due to the development of reinforcing agents having functions such as heat insulation, water resistance, heat resistance, flame resistance, chemical resistance and weather resistance in addition to the basic reinforcement. It is becoming.

Patent Document No. 2 relates to a natural stone pattern-forming coating composition, and is a natural stone pattern-forming coating composition formed by mixing a primary composition, a secondary composition, a film forming aid, a thickener, a preservative, a dispersant, and an antifoaming agent, and the primary composition is It is composed of acrylic resin emulsion, water, 80-140 mesh natural silica, sieving pigment and colorant, and the secondary composition is a natural stone pattern forming paint composed of acrylic resin emulsion, water, 80-140 mesh natural silica and glass fiber. The composition is disclosed.

Although the prior art realizes the effect of imparting a natural stone pattern on the surface of the floor, there are some problems in which functionality, such as heat insulation, water resistance, heat resistance, flame retardancy, chemical resistance, and weather resistance, is somewhat weak.

In addition, Patent Literature 3 discloses an aqueous coating composition having excellent fouling resistance and elasticity, and Patent Literature 4 discloses a matter regarding an aqueous coating composition for building insulation. However, these paints do not have excellent waterproof performance, and does not show excellent performance in durability.

Currently, in Korea, a coating film waterproofing method using heat shielding and reflection performance is used for waterproofing roofs of some buildings, but this is a concept supplemented by additionally applying a functional coating on top of the waterproofing agent.

In addition, the urethane waterproofing agent has no water vapor permeability, so the expansion and contraction caused by heat of the building material is large in the region where the temperature difference is large according to the season, and there is a limit to maintaining the waterproofing performance in the long term by internal and external chemical reactions. It is a difficult situation.

Therefore, by improving the environmental conditions of the roof of the building through heat shielding and reflection, energy saving and continuous waterproof performance are ensured. In the long term, the new insulation, heat shielding, reflective waterproofing method, which is efficient and economical to maintain and manage, and accordingly A composition is needed.

(1) Korean Unexamined Patent Publication No. 10-2013-0137324 (2) Korean Patent Registration No. 10-1036311 (3) Korean Patent Registration No. 10-0610457 (4) Korean Unexamined Patent Publication No. 10-1999-014598

One object of the present invention is excellent in waterproofness to the adherend, environmentally friendly and the coating layer is well maintained after construction, can effectively block the sunlight and heat moving inside and outside the building to save energy and increase the heating and cooling efficiency It is to provide an aqueous acrylic waterproof material having excellent corrosion resistance and durability, and can be installed even in the presence of moisture and excellent adhesion.

Another object of the present invention is to provide a construction method of the waterproof material.

However, the problem to be solved by the present invention is not limited to the above-mentioned problem, and may be variously expanded within a range without departing from the spirit and scope of the present invention.

Aqueous acrylic waterproofing material according to exemplary embodiments of the present invention for achieving the above object of the present invention, 40 to 55% by weight of water-soluble acrylic copolymer, 2,2,4-trimethyl-1,3-pentanediol 1-3 wt%, calcium carbonate 10-25 wt%, iron oxide particles 5-10 wt%, titanium dioxide particles 5-15 wt%, thermal conductivity material 5-15 wt%, plate-like, gold, silver, At least one selected from the group consisting of platinum, aluminum, copper, nickel, zeolite and kaolin, the area-to-thickness ratio is 50 or more, the ratio of the major axis to the minor axis is 0.7 to 1.5, and the length of the major axis is 1 to 50 µm. 0.1 to 3% by weight of the light reflection material and 0.01 to 3% by weight of the metal-based corrosion inhibitor having a wire shape having a length of 1 to 500 µm and a diameter of 0.02 to 0.1 µm.

According to one embodiment, the heat conductive material includes an organic polymer hollow body or an inorganic hollow body having a diameter of 0.5 to 100㎛.

According to one embodiment, the metal-based corrosion inhibitor comprises at least one selected from the group consisting of lithium, barium, magnesium, zinc, aluminum, copper, iron and alloys thereof.

According to one embodiment, graphite flakes are bonded to the surface of the metal-based corrosion inhibitor.

According to one embodiment, the organic ligand is bonded to the surface of the metal-based corrosion inhibitor.

Waterproofing method according to an embodiment of the present invention, the step of arranging the base surface of the substrate, the step of repairing by filling the protective mortar in the pores or damaged parts exposed from the cleaned base surface, the repaired base surface The method of claim 1, further comprising applying the aqueous acrylic waterproofing material of any one of claims 1 to 5, and drying the aqueous acrylic waterproofing material to form a waterproof coating film.

According to exemplary embodiments of the present invention as described above, it is excellent in waterproof and durable to the adherend, environmentally friendly, can reflect sunlight, effectively block heat to save energy, moisture It is possible to install even where there is, and waterproof construction with excellent adhesion is possible.

1 is a flowchart illustrating a waterproof construction method according to an embodiment of the present invention.
2A and 2B are SEM photographs of the corrosion inhibitors used in Examples 1 and 2. FIG.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, operation, component, or a combination thereof described in the specification, but one or more other features or numbers. It is to be understood that the present invention does not exclude in advance the possibility of the presence or the addition of steps, actions, components or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Water-based acrylic waterproofing material according to an embodiment of the present invention can be coated for the purpose of waterproofing, rust prevention, corrosion protection, surface protection, etc. by forming a coating layer on the adherend made of concrete, wood, metal, etc. of the building, specifically It may be coated for the purpose of waterproofing, heat shielding, insulation and section repair of roofs, exterior walls, bottoms of reservoirs or tanks, sewers, etc. of buildings.

For example, the roof of a building may be made of materials such as concrete, slate, metal, roof tiles, and asphalt shingles, and most of the buildings are exposed to the external environment, and leakage occurs frequently due to breakage. Therefore, it is necessary to control heat and moisture in order to secure the waterproofness and durability of the components of the building and to save energy to increase the heating and cooling efficiency.

Aqueous acrylic waterproofing material according to an embodiment of the present invention is a water-soluble acrylic copolymer, 2,2,4-trimethyl-1,3-pentanediol (hereafter texanol), calcium carbonate, iron oxide, titanium dioxide, heat conductive material, light Reflective materials and corrosion inhibitors. In addition, the aqueous acrylic waterproofing material may further include a dispersant, antifoaming agent, antiseptic (antibacterial), thickener and color pigment.

According to one embodiment, the aqueous acrylic waterproofing material, 40 to 55% by weight of water-soluble acrylic copolymer, 1 to 3% by weight of texanol, 0.05 to 0.3% by weight of dispersant, 0.05 to 0.3% by weight of antifoaming agent, and 0.05 to 0.3% by weight of antiseptic (antibacterial) 0.3 wt%, thickener 0.05-0.3 wt%, calcium carbonate 10-25 wt%, iron oxide particles 5-10 wt%, titanium dioxide particles 5-15 wt%, color pigment 0.1-1.0 wt%, heat conductive material 5-15 It may include a weight percent, 0.1 to 3% by weight of the light reflection material, 0.01 to 3% by weight of the metal-based corrosion inhibitor.

More preferably, the aqueous acrylic waterproofing material, 45 to 55% by weight of water-soluble acrylic copolymer, 1 to 3% by weight of texanol, 0.05 to 0.3% by weight of dispersant, 0.05 to 0.3% by weight of antifoaming agent, 0.05 to 0.3% by weight of antiseptic or antibacterial agent , 0.05 to 0.3% by weight of thickener, 10 to 25% by weight of calcium carbonate, 5 to 10% by weight of iron oxide particles, 5 to 15% by weight of titanium dioxide particles, 0.1 to 1.0% by weight of color pigments, 5 to 15% by weight of thermally conductive material, It may include 0.1 to 3% by weight of the light reflection material, 0.1 to 1% by weight of the metal-based corrosion inhibitor.

The said water-soluble acrylic copolymer has the characteristic of large adhesive force and excellent waterproof and moisture proof effect. When the content of the water-soluble acrylic copolymer is excessive or excessive, the adhesive force may be lowered, or the elasticity of the coating film may be lowered.

The water-soluble acrylic copolymer may be obtained by polymerization of an acrylic monomer or a vinyl monomer having an unsaturated bond. For example, the water-soluble acrylic copolymer is butyl acrylate (Butylacrylate), ethyl acrylate (Ethylacrylate), methyl acrylate (Methylacrylate), 2-ethylhexyl acrylate (2-Ethylhexyl Acrylate), methacrylate (Methacrylates) ), 2-chloroethyl vinyl ether, (2-Chloroethyl vinyl ether), hydroxyethyl methacrylate (Hydroxyethyl methacrylate) and TMPTA (Trimethylolpropane triacrylate) can be obtained by the polymerization of at least two or more monomers.

The texanol may be included in a waterproof material to improve characteristics such as adsorption, scrub resistance, washability, color, and thermal flexibility. It can also be used with an appropriate amount of thickener to improve the thickening efficiency. Texanol is also environmentally friendly with low toxicity and biodegradability and no VOCs. In particular, in the present invention, the texanol may soften the coating film to prevent cracking caused by expansion pressure due to freezing, thereby increasing freeze-thawing stability and coating and protecting solid particles.

According to one embodiment, the content of the texanol may be 1 to 3% by weight. When the content of the texanol is less than 1% by weight, aggregation of the metal-based corrosion inhibitor may occur, and the low temperature stability of the coating film may be lowered.

Dispersants disperse solid particles and prevent agglomeration. As the dispersant, a surfactant, an emulsifier, a peptizer, or the like may be used. For example, polyvinyl acetate resin (PVAC), polyvinylpyrrolidone (PVD), or the like may be used as the polymer surfactant.

For example, the dispersant may include polyvinylpyrrolidone. Polyvinylpyrrolidone interacts with the surface of the metal-based corrosion inhibitor and is effective in dispersing the metal-based corrosion inhibitor.

The antifoaming agent can suppress generation of bubbles, bubbles, and pinholes.

The preservative may prevent contamination of the coating and maintain aesthetics by imparting antibacterial properties to the waterproofing material and the coating.

The thickener can improve the workability by increasing the viscosity of the waterproofing material to impart thixotropy properties. According to one embodiment, the thickener may include a urethane-based thickener.

Iron oxide can reinforce the strength of the coating film and can prevent rust and corrosion of the adherend. For example, the iron oxide may be particles having a diameter of 20 ~ 500㎛. For example, the iron oxide may include iron dioxide (Fe 2 O 3), iron trioxide (Fe 3 O 4), or a combination thereof.

Calcium carbonate can improve the strength of the waterproofing material and prevent cracking of the coating film. In addition, the unit surface area is large, the thickening effect can be increased.

Titanium dioxide can improve the light shielding / insulation performance by improving the strength of the waterproof material and forming an oxide film to reflect or scatter sunlight and ultraviolet rays.

For example, the thermally conductive material may include an organic polymer hollow body or an inorganic hollow body having a diameter of 0.5 to 100 μm. Preferably, the heat conductive material may have a micro hollow tool shape having a diameter of 0.5 to 5㎛.

For example, the organic polymer hollow body may include PVA, PVC, latex, carbon, and the like, and the inorganic hollow body may include glass, silica, zinc oxide, and the like.

According to one embodiment, the heat conductive resistance material may include porous silica surface modified with a silane coupling agent. Porous silica surface-modified with the silane coupling agent is excellent in dispersibility.

The light reflection material is intended to prevent transmission by reflecting or scattering sunlight or ultraviolet rays, and may include gold, silver, platinum, aluminum, copper, nickel, zeolite, kaolin, or a combination thereof. In addition, the light reflection material may be particles having a plate shape. For example, the area ratio of the light reflecting particles to the thickness may be 50 or more, the ratio of the major axis to the minor axis is 0.7 to 1.5, and the major axis may have a length of 1 to 50 μm.

The corrosion inhibitor is included in the waterproofing component in the form of a wire. Therefore, when a crack occurs in the coating film or an oxidation reaction of the metal deposit occurs by the fixing member and the penetrating water, the corrosion inhibitor loses electrons and oxidizes instead of the deposit, thereby significantly reducing the oxidation and rust occurrence of the deposit.

The corrosion inhibitor may comprise a metal having a lower ionization potential than the metal of the adherend. For example, the corrosion inhibitor may include lithium, barium, magnesium, zinc, aluminum, iron, chromium, nickel, silicon, lead, calcium, copper, tungsten, and the like. According to one embodiment, the corrosion inhibitor may include lithium, barium, magnesium, zinc, aluminum, iron, copper and the like. In addition, the corrosion inhibitor may include an alloy such as a zinc-copper alloy, an aluminum-copper alloy, a copper-aluminum-zinc alloy, or the like. Specifically, the corrosion inhibitor may include a galvanized copper wire, an aluminum plated copper wire, and the like. Zinc and aluminum have a lower ionization potential than iron and, when oxidized, may serve to absorb light.

According to an embodiment, the corrosion inhibitor may have a wire or rod shape having a length of 1 to 500 μm and a diameter of 0.02 to 0.1 μm.

According to one embodiment, the content of the corrosion inhibitor may be 0.01 to 3% by weight, preferably 0.01 to 0.5% by weight. When the content of the corrosion inhibitor is excessive, agglomeration of particles may occur, cracking of the coating film may occur, and smoothness may be reduced.

According to one embodiment, the corrosion inhibitor may be surface modified to improve dispersibility. For example, graphite flakes may be bonded to the surface of the corrosion inhibitor.

In another embodiment, an organic ligand may be bound to the surface of the corrosion inhibitor. For example, an oleate ligand formed by the reaction with oleic acid may be bound to the surface of the corrosion inhibitor.

1 is a flowchart illustrating a waterproof construction method according to an embodiment of the present invention.

Referring to FIG. 1, first, the base surface of the substrate is arranged (S10). The substrate may be a concrete structure such as a building rooftop or the like. The concrete structure may include a metal substrate exposed on the base surface. Next, the protective mortar is filled and repaired in the pores or damaged parts exposed from the clean up surface (S20). Next, the aqueous acrylic waterproofing material is applied to the base surface (S30). Next, the aqueous acrylic waterproofing material is dried to form a waterproof coating film (S40).

Hereinafter, through the specific examples and experiments, the effect of the waterproofing material according to the present invention will be described in detail.

Example

According to the composition of Table 1 below, a water-soluble acrylic consisting of polymethyl methacrylate, butyl acrylate, butycrylic acid, 2-ethylhexyl acrylate The copolymer is added and stirred at 700 rpm using a high speed impeller stirrer. After adding and stirring texanol, a dispersant (commercial), an antifoaming agent (commercial), a preservative (commercial), and a urethane thickener (commercial) are added and then stirred. Then, calcium carbonate, iron oxide and titanium dioxide are added and stirred, followed by coloring pigment (commercial), heat conductive material (glass hollow sphere with a diameter of 10 μm), light reflecting material (plate aluminum particles), and corrosion inhibitor (copper wire ), The aqueous acrylic waterproofing materials of Examples 1, 2 and Comparative Example 1 were prepared while stirring and dispersing.

In addition, Table 1 shows the results of the characteristics of the waterproofing material of the aqueous acrylic waterproofing material coated on the metal slave substrate for the inclined roof pretreated (foreign materials / rust removal).

In addition, to evaluate the corrosion characteristics, a specimen prepared by uniformly coating a waterproof material on one side of a 5cm X 10cm X 0.1cm iron plate using a 30㎛ Bar coater was prepared, and half of the specimen was immersed in 5% saline (NaCl) solution. After the half was exposed to air and stored in a 65 degree constant temperature and humidity oven, the corrosion of the iron plate was observed and the results are shown in Table 2.

In the rust generation evaluation, the rust generation date was confirmed by observing the occurrence of rust in the point or line shape of 10 μm or more at the interface between the air and the brine on the iron plate surface where the waterproofing material was not applied.

The amount of rust was measured by optical microscope and naked eye after 100 days and 200 days of exposed parts in air and part immersed in brine on the surface of steel plate which is not coated with waterproofing material.

In addition, in order to evaluate the corrosion characteristics, a specimen of Comparative Example 2 was prepared using the same method as in Example 1 except that spherical copper particles having a diameter of 20 μm were used as corrosion inhibitors.

Table 1

TABLE 2

2A and 2B are SEM photographs of the corrosion inhibitors used in Examples 1 and 2. FIG. 2A and 2B, it can be seen that the corrosion inhibitor has a wire or rod shape having a length of 1 to 500 μm and a diameter of 0.02 to 0.1 μm.

Referring to Table 1, Examples 1 and 2 were excellent in light reflection characteristics. However, in Example 2, where the addition amount of the acrylic copolymer was small and the content of the light reflection particles was high, the adhesion between the coating film and the substrate was slightly reduced. In addition, in Comparative Example 1 that does not include a light reflecting material, the diffuse reflectance was greatly reduced to 41%.

Referring to Table 2, it can be seen that in the case of using the spherical anti-corrosion particles, the improvement of the anti-corrosion performance is insignificant, but by adding an appropriate amount of the wire-shaped anti-corrosion particles, the anti-corrosion performance of the coating film can be greatly improved. have.

Although described with reference to exemplary embodiments of the present invention as described above, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below It will be understood that modifications and changes can be made.

Waterproofing material and waterproof construction method according to an exemplary embodiment of the present invention can be used, such as waterproofing of building exterior materials of various materials.

Claims (6)

40 to 55% by weight of water-soluble acrylic copolymer;
1-3 weight percent of 2,2,4-trimethyl-1,3-pentanediol;
10-25 wt% calcium carbonate;
Iron oxide particles 5-10 wt%;
Titanium dioxide particles 5 to 15% by weight;
5 to 15% by weight of the thermally conductive material;
It has a plate-like shape, and comprises at least one selected from the group consisting of gold, silver, platinum, aluminum, copper, nickel, zeolite and kaolin, the ratio of the area to the thickness is 50 or more, the ratio of the major axis and minor axis is 0.7 to 1.5 0.1 to 3% by weight of the light reflecting material having a long axis of 1 to 50 μm in length; And
0.01 to 0.5% by weight of a metal-based corrosion inhibitor having a wire shape having a length of 1 to 500 µm and a diameter of 0.02 to 0.1 µm,
An aqueous acrylic waterproofing material, characterized in that the graphite flakes are bonded to the surface of the metal-based corrosion inhibitor. The aqueous acrylic waterproofing material according to claim 1, wherein the thermally conductive resistance material comprises an organic polymer hollow body or an inorganic hollow body having a diameter of 0.5 to 100 µm. The aqueous acrylic waterproofing material of claim 1, wherein the metal-based corrosion inhibitor comprises at least one selected from the group consisting of lithium, barium, magnesium, zinc, aluminum, copper, iron, and alloys thereof. delete The water-based acrylic waterproofing material of claim 1, wherein an organic ligand is bonded to the surface of the metal-based corrosion inhibitor. Arranging the base surface of the substrate;
Repairing and filling the protective mortar with the voids or the damaged parts exposed from the clean surface;
Applying the water-based acrylic waterproofing material of any one of claims 1 to 3 and 5 to the repaired base surface; And
Waterproofing method comprising the step of drying the aqueous acrylic waterproofing material to form a waterproof coating.

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