KR100921676B1 - Method and structure for complex sheet waterproof using rubber asphalt sheet coated with non-solvent type urethane - Google Patents

Abstract

PURPOSE: A waterproofing sheet structure using a rubber asphalt sheet and a constructing method thereof are provided to get rid of peeling phenomena between waterproofing layers. CONSTITUTION: A waterproofing sheet structure comprises a rubber asphalt sheet, nonwoven layer, and solvent-less urethane waterproof coating layer. A method for constructing the waterproofing sheet structure comprises the following steps of: laminating the nonwoven layer(120) on the rubber asphalt sheet; laminating the rubber asphalt sheet(110) on it; and drying the laminate for complete adhesion.

Description

{Method and structure for complex sheet waterproof using rubber asphalt sheet coated with non-solvent type urethane}

The present invention relates to a waterproof sheet structure and a composite sheet waterproofing method, and more particularly, to a composite waterproof sheet structure and a composite sheet waterproofing method in which the upper portion of the rubberized asphalt sheet is coated with a solvent-free urethane waterproofing agent.

Inorganic film waterproofing or urethane waterproofing, which is a typical waterproofing method, is a method of repeatedly applying a waterproofing agent to a construction surface with rollers, sprays, brushes, etc., to form a double-layer waterproof structure. The labor cost is high, the number of processes is high, the process management is complicated and uncertain, and the adhesion between the waterproof layers is weak, so that the peeling accident is frequent, and the waterproof layer may be ruptured due to slight impact even after construction.

As a dry waterproofing method to compensate for these drawbacks, a sheet waterproofing method for forming a waterproof layer by attaching a thin sheet of plastic or synthetic rubber with an adhesive has been proposed, but it is inconvenient to install because the waterproof construction surface must be stopped in advance. If there is moisture, it is impossible to bond the waterproof sheet to the construction surface, and the seams between the sheets are easily lifted, and the seams between the sheets are not good in appearance, and the seams are excited or discolored as time passes. There is a problem.

Therefore, there is a request for a new waterproofing method and waterproof sheet that can compensate for the above disadvantages.

The present invention, in order to solve the problems of the prior art, can be constructed in a short period of time, can be installed in a minimum process step, is formed in a structure that does not occur inherently peeling accident between the waterproof layer, by the impact after construction It is an object of the present invention to provide a composite waterproof sheet structure and a composite sheet waterproofing method in which the waterproof layer is not ruptured.

In addition, the present invention does not require precise pre-stopping of the waterproof construction surface, and the composite waterproof sheet structure and composite which can prevent the occurrence of defects due to the seam by coating the joints between the sheets with a solvent-free urethane waterproofing agent. It is an object to provide a sheet waterproofing method.

In addition, the present invention provides a composite waterproof sheet structure and a composite sheet waterproofing method that does not break the waterproof layer even when the concrete sphere on the construction surface is not broken because the insulating surface is not in close contact with the construction surface and the waterproof sheet. It aims to do it.

In addition, the present invention does not require construction skills due to the factory-standard dry composite sheet waterproofing material, it is possible to shorten the air and reduce construction costs, and because there is no seam in appearance, defects such as discoloration or lifting of the joint part after construction It is an object to provide a composite waterproof sheet structure and a composite sheet waterproofing method without any.

In addition, the present invention is coated with a solvent-free urethane waterproofing agent having an elongation rate and strength that can sufficiently cope with the natural deformation of the rubberized asphalt sheet according to the temperature change, the deformation does not occur in the waterproof sheet structure after construction, it is resistant to ultraviolet rays, waterproof It is an object to provide a composite waterproof sheet structure and a composite sheet waterproofing method which are excellent in performance.

In addition, the present invention is an environmentally friendly product that does not use harmful organic solvents to the human body, there is no material that can melt the asphalt sheet because the organic solvent is not used, there is no room for problems in the process, excellent tensile strength, durable In addition, the object of the present invention is to provide a composite waterproof sheet structure and a composite sheet waterproofing method that can be easily constructed using a composite sheet waterproofing material having excellent elasticity after construction because of its excellent walkability.

Composite waterproof sheet structure according to the present invention for achieving the above object, the rubberized asphalt layer; Nonwoven layer; It is characterized by comprising a solvent-free urethane waterproof coating layer.

In addition, the nonwoven fabric layer is characterized in that formed of a polypropylene nonwoven fabric, polyethylene terephthalate nonwoven fabric, polyethylene foam sheet, acrylic foam sheet or cotton cloth.

In addition, the solvent-free urethane waterproofing coating layer is formed of a two-component reaction curable waterproofing agent consisting of a main agent and a curing agent, the main branch is a branched polyether-polyester polyol, filler (filler), diluent (diluent) And a leveling agent, a humidity scavenger, an air release agent, and an ultraviolet shielding agent, wherein the curing agent is 50 to 100 parts by weight of diisocyanate based on 100 parts by weight of the main ingredient. It is characterized by consisting of a curing agent of the compound.

In addition, the subject is 35 to 70 parts by weight of the branched polyether-polyester polyol, 35 to 60 parts by weight of the filler, 1 to 10 parts by weight of fatty acid ester as the diluent, acrylic as the leveling agent 0.1 to 3 parts by weight of copolymer (acrylate), 1 to 5 parts by weight of zeolite (zeolite powder) as the dehumidifying agent, 0.1 to 2 parts by weight of silicone oil (silicone oil) as the antifoaming agent, tinubin as the sunscreen 0.1 to 3 parts by weight, and the filler is characterized in that at least one selected from talc (quartz powder), quartz (quartz powder), calcium carbonate (CaCO ₃ ), barium sulfate (barium sulfate).

On the other hand, composite sheet waterproofing method according to the present invention for achieving the above object, the step of laminating a nonwoven layer on the rubberized asphalt sheet; Stacking the rubberized asphalt sheet on a construction surface; And performing dry drying using a heating means for complete adhesion between the construction surface and the rubberized asphalt sheet, and forming a solvent-free urethane waterproofing coating layer on the nonwoven fabric layer.

In addition, the rubberized asphalt sheet is laminated to a thickness of 2 ~ 3mm, the nonwoven fabric is a density of 50 ~ 150g / m ² , the solvent-free urethane waterproof coating layer is characterized in that the laminated to a thickness of 2-3mm.

In addition, the composite sheet waterproofing method according to the invention is characterized in that the dry waterproofing method does not apply a primer.

According to the present invention, it can be constructed in a short period of time, can be installed in a minimum process step, formed in a structure that does not occur inherently peeling accident between the waterproof layer, composite after the construction does not have to worry about bursting the waterproof layer by impact Waterproof sheet structures and composite sheet waterproofing methods are provided.

In addition, according to the present invention, it is unnecessary to precisely stop the waterproof construction surface, and the composite waterproof sheet structure which can prevent the occurrence of defects due to the seam by coating the joints between the sheets with a solvent-free urethane waterproofing agent. And a composite sheet waterproofing method.

In addition, according to the present invention, since the construction surface and the waterproof sheet is not in close contact with each other, the waterproof layer does not break even when the concrete sphere on the construction surface cracks, and the composite waterproof sheet structure and the composite sheet waterproofing method do not cause swelling of the sheet waterproofing material. This is provided.

In addition, according to the present invention, since the factory-standard composite sheet waterproofing material is used, the construction skill is not required, and the air shortening and construction cost can be reduced, and since there is no seam in appearance, such as discoloration or lifting of the joint part after construction. There is provided a composite waterproof sheet structure having no defects and a composite sheet waterproofing method.

In addition, according to the present invention, by coating a solvent-free urethane waterproofing agent having an elongation rate and strength that can sufficiently cope with the natural deformation of the rubberized asphalt sheet due to ultraviolet rays, it is resistant to ultraviolet rays without deformation in the waterproof sheet structure after construction, A composite waterproof sheet structure and a composite sheet waterproofing method having excellent waterproof performance are provided.

In addition, according to the present invention, since there is no material that can melt the asphalt sheet because no organic solvent is used as an environmentally friendly dry waterproofing method that does not use harmful organic solvents to the human body, there is no problem in the process, excellent tensile strength and There is provided a composite waterproof sheet structure and a composite sheet waterproofing method which can be easily constructed by using a composite sheet waterproofing material having high durability and elasticity and having excellent walkability after construction.

Hereinafter, with reference to the accompanying drawings showing a preferred embodiment of the present invention will be described in more detail.

1 is a structural diagram of a composite waterproof sheet structure using a solvent-free urethane waterproof coated rubberized asphalt sheet according to an embodiment of the present invention.

The rubberized asphalt sheet 110 to which the nonwoven fabric 120 is adhered on the construction surface 100 and the solventless urethane waterproofing agent 130 are sequentially stacked.

The rubberized asphalt sheet 110 may be manufactured as a standard product in the manufacturing plant to have a length and width of about 10 m x 1 m per roll. The rubberized asphalt sheet 110 provides a moisture proof, dustproof, and anticorrosive function between the concrete layer constituting the construction surface 100 and the upper solventless urethane waterproofing coating layer 130. The rubberized asphalt sheet 110 is provided in a thickness of about 2-3 mm, preferably about 2.5 mm.

The nonwoven fabric 120 is laminated on the rubberized asphalt sheet 110 in advance, and the nonwoven fabric 120 improves the bonding force between the rubberized asphalt sheet 110 and the solventless urethane waterproofing coating layer 130 and at the same time a solventless urethane waterproofing coating layer ( 130) provides a function of increasing the tensile strength, the nonwoven fabric 120 is used a weight of about 50 ~ 150g / m ² .

In addition, the nonwoven fabric 120 is provided in a thickness of about 2 to 3mm, preferably about 2.5mm. In addition, the nonwoven fabric 120 uses a polypropylene (PP) nonwoven fabric, a polyethylene terephthalate (PET) nonwoven fabric, a polyethylene foam sheet, an acrylic foam sheet, and a cotton cloth.

Although it is stably adhered to the concrete layer constituting the construction surface 100 by the adhesive force of the rubberized asphalt sheet 110, but because it is not a completely close structure, the solvent-free urethane waterproof coating layer 130 even in the crack of the construction surface 100 The layer does not break, and swelling or peeling may be prevented. In addition, it is not necessary to apply a primer on the construction surface 100, not only shortens the air, but also environmentally friendly construction is possible.

On the other hand, the non-woven fabric 120 is laminated on the rubberized asphalt sheet 110, the solvent-free urethane waterproof coating layer 130 is formed, the solvent-free urethane waterproofing agent has excellent adhesion to the rubberized asphalt sheet 110, water resistance, gloss Not only is it excellent in resistance to abrasion, chemicals, etc., but also exposed to outdoor sunlight, it has good UV resistance, and has adequate resistance to other salts, chemical vapors (acid or alkali), dust, and moisture. .

In addition, the solvent-free urethane waterproofing agent has properties similar to solvent-based paints without using heavy metals such as dioctylphthalate (DOP) and lead (Pb) and organic solvents (Xylene, thinner, etc.), which are limited in use due to environmental hormone problems. There is an advantage to having.

The solvent-free urethane waterproofing agent is a two-component reaction curing type waterproofing agent consisting of a main agent and a curing agent, and a branched polyether-polyester polyol, a filler, a diluent, a leveling agent, It is characterized by consisting of a main body including a humectant (humidity scavenger), an anti-foaming agent (air release), an ultraviolet shielding (ultraviolet shielding), and a curing agent of 50 to 100 parts by weight of the diisocyanate compound relative to 100 parts by weight of the subject.

The following table is a table briefly showing the solvent-free urethane waterproofing composition and the content as configured above.

Table 1

division Composition content Suzy Branched Polyether-Polyester Polyols 35 to 70 parts by weight Filler Talc, silica sand, calcium carbonate, barium sulfate 35 to 60 parts by weight diluent Fatty acid ester compound 1 to 10 parts by weight Antifoam Silicone oil 0.1 to 2 parts by weight Leveling agent Acrylic Copolymer 0.1 to 3 parts by weight Dehumidifier Zeolite 1 to 10 parts by weight Sunscreen Tinuvin 0.1 ~ 3

Looking at the composition of the composition as described above, first, the main resin (resin) is a branched polyether-polyester polyol (branched polyether) environmentally friendly and lower viscosity than the conventional polyurethane resin containing the environmentally hazardous substance DOP -polyester polyol) is preferable to use 35 ~ 70 parts by weight.

Next, fillers are added to supplement the properties of the raw materials or products and to reduce the material cost. As fillers, talc, quartz powder, calcium carbonate (CaCO ₃ ) and barium sulfate are used. Either optionally add one or more.

As described above, even if one or more selected fillers are added, there is no big problem in the physical properties, and the content of the filler is preferably 35 to 60 parts by weight. This is because the physical properties may be lowered when added above the content, and the production cost of the product increases when the amount of the branched polyether-polyester polyol is added when added below the content. It is expensive and some deterioration of properties such as wear resistance may occur.

And anti-foaming (air release) is to suppress the generation of bubbles and to remove the bubbles inside and outside the formed film is used silicone oil (silicone oil) and the ratio is preferably added 0.1 to 2 parts by weight because It is because there exists a possibility that adhesive force may fall when it adds more than the said ratio.

And as a leveling agent (levelling agent) added to maintain the self-leveling of the solvent-free urethane waterproofing agent is used an acrylic copolymer (copolymer acrylate) is preferably added in an amount of 0.1 to 3 parts by weight. This is because when the additive is not added, the marks of the roller or the brush may remain on the construction surface during construction.

In the present invention, the fatty acid ester compound obtained by esterifying the fatty acid extracted from the vegetable raw material so as to supplement the problems of the conventional solvent-type urethane waterproofing agent to which DOP and solvent are added, and have similar properties as the conventional solvent-type urethane waterproofing agent. Was added as diluent. The fatty acid ester compound serves to lower the viscosity as a vegetable fatty acid, the ratio is preferably added to 1 to 10 parts by weight.

In addition, 1 to 10 parts by weight of zeolite (zeolite powder) is added as a humidity scavenger to remove moisture of the main ingredient. The reason why the dehumidifying agent is added is that when the dehumidifying agent is not added, moisture in the product may react with the curing agent, thereby causing a problem in construction due to a faster gel time.

Meanwhile, since the top coat is directly affected by the surrounding environment, that is, the color may change when directly exposed to outdoor sunlight, 0.1 to 3 parts by weight of tinubin, which is an ultraviolet shielding agent, is added.

1-10 parts by weight of a pigment powder having green, white, or the like as a pigment may be added to the main ingredient, which is formed as described above, and the color may be freely performed according to a user's arbitrary choice.

When the main component is composed of the two-component reaction curable waterproofing agent as described above, diisocyanate compound diisocyanate methylbenzene (TDI), diphenylmethane diisocyanate (MDI), hexamethylene diisocyanate (HDI), isophorone diisocyanate as a curing agent Any one or more selected from (IPDI) can be used.

Among the curing agents, diisocyanate methylbenzene (TDI) and diphenylmethane diisocyanate (MDI) have fast reactivity, and pot life is within 30 minutes, and hexamethylene diisocyanate (HDI) and isophorone diisocyanate (IPDI) have low reactivity. Housework may take a day or two or more. Therefore, it is preferable to adjust the pot life by appropriately mixing the pot life is fast and slow to suit the working environment of the curing agent.

The curing agent mixed as described above is used by adding 50 to 100 parts by weight based on 100 parts by weight of the main ingredient to the main ingredient.

Figure 2 is a flow chart illustrating a composite sheet waterproofing method using a solvent-free urethane waterproof coating rubberized asphalt sheet according to the present invention.

First, the nonwoven fabric 120 is laminated on one surface of the rubberized asphalt sheet 110 (S10). In practice, the rubberized asphalt sheet 110 is preferably shipped from the factory in the state of the rubberized asphalt composite sheet in which the nonwoven fabric 120 is laminated. At this time, the other surface of the rubberized asphalt sheet 110, the non-woven fabric 120 is not laminated is preferably given the adhesive force in a known manner for zero adhesive strength with the construction surface (100).

Subsequently, the rubberized asphalt sheet 110 or rubberized asphalt composite sheet on which the nonwoven fabric 120 is laminated is constructed on the construction surface 100 (S20), the rubberized asphalt sheet 110 and the construction surface 100, and Dry drying is performed using heating means (not shown) for complete adhesion between the nonwoven fabrics 120 (S30).

Finally, a solvent-free urethane waterproofing agent is coated on the rubberized asphalt composite sheet to form a solvent-free urethane waterproofing coating layer 130 (S40).

On the other hand, the solvent-free urethane waterproofing agent is prepared by blending the main ingredient, the blended main ingredient and the curing agent, and then mixing the main ingredient and the curing agent well using an electric stirrer (rpm 800 ~ 1000).

Thus, the finished solvent-free urethane waterproofing agent is applied to the upper portion of the rubberized asphalt composite sheet constructed so as not to overlap each other to form a coating layer, and the coating method of the solvent-free urethane waterproofing agent may be a roll or spray method.

On the other hand, after forming the solvent-free urethane waterproofing coating layer, it is preferable to dry naturally for about 24 hours for complete curing.

On the other hand, Table 2 below is an experimental result of a comparative analysis of a solvent-free urethane waterproofing coating layer according to the present invention and the aqueous acrylic top coat which is a conventional waterproof coating for a top coat.

Table 2

 Test Items  Conventional Acrylic Topcoat  The present invention Shore hardness after 2 days at 80 ℃ 50 65 Tensile strength in MPa 10 20 Elongation (% Elongation in%) 40 64 Tear resistance in N / mm 25 52 Glass transition temperature in ℃ -10 -23/30

As shown in the test results, the solvent-free urethane waterproofing coating layer according to the present invention has excellent shear hardness, tensile strength and elongation, and tear strength as compared to the conventional aqueous acrylic top coat waterproofing agent.

Although the present invention has been described above with reference to a preferred embodiment of the present invention, the scope of the present invention is not limited to the above-described embodiment, but should be defined by the appended claims, and the scope of the claims All changes or modifications derived from the description and the equivalent concepts should be construed as being included in the scope of the present invention.

1 is a structural diagram of a waterproof sheet structure according to an embodiment of the present invention.

2 is a flow chart of the composite sheet waterproofing method according to an embodiment of the present invention.

Figure 3a to 3c is a construction photo applying the composite sheet waterproofing method according to an embodiment of the present invention, Figure 3a is a state before construction, Figure 3b is a state of constructing a rubberized asphalt sheet, Figure 3c is a solvent-free urethane The waterproof coating layer was constructed.

Claims (6)

delete delete Rubberized asphalt layer; Nonwoven layer; And Including a solvent-free urethane waterproof coating layer, The nonwoven layer is formed of a polypropylene nonwoven fabric, polyethylene terephthalate nonwoven fabric, polyethylene foam sheet, acrylic foam sheet or cotton cloth, The solvent-free urethane waterproofing coating layer is formed of a two-component reaction curing type waterproofing agent consisting of a main agent and a curing agent, and the main agent is a branched polyether-polyester polyol, a filler, a diluent, a leveling agent. The curing agent comprises a leveling agent, a humidity scavenger, an air release agent, and an ultraviolet shielding agent, and the curing agent is a curing agent of 50 to 100 parts by weight of a diisocyanate compound based on 100 parts by weight of the main ingredient. Waterproof sheet structure, characterized in that consisting of. The method of claim 3, wherein The subject is 35 to 70 parts by weight of the branched polyether-polyester polyol, 35 to 60 parts by weight of the filler, 1 to 10 parts by weight of fatty acid ester as the diluent, acrylic copolymer as the leveling agent (copolymer acrylate) 0.1 to 3 parts by weight, 1 to 5 parts by weight of zeolite (zeolite powder) as the dehumidifying agent, 0.1 to 2 parts by weight of silicone oil (silicone oil) as the antifoaming agent, 0.1 to tinubin as the sunscreen (tinubin) 3 parts by weight, wherein the filler is at least one selected from talc, quartz powder, calcium carbonate (CaCO 3), barium sulfate, waterproof sheet structure. Laminating a nonwoven layer formed of a polypropylene nonwoven fabric, a polyethylene terephthalate nonwoven fabric, a polyethylene foam sheet, an acrylic foam sheet, or a cotton cloth on a rubberized asphalt sheet; Stacking the rubberized asphalt sheet on a construction surface; Performing dry drying using heating means for complete adhesion between the construction surface and the rubberized asphalt sheet on which the nonwoven layer is laminated; And It is formed of a two-part reaction curable waterproofing agent consisting of a base and a curing agent, wherein the main body is a branched polyether-polyester polyol, a filler, a diluent, a leveling agent, A solvent-free urethane waterproofing agent comprising a dehumidifying agent (humidity scavenger), an anti-foaming agent (air release), a sunscreen (ultravilolet shielding), wherein the curing agent is composed of 50 to 100 parts by weight of a diisocyanate-based compound based on 100 parts by weight of the main ingredient. Forming a coating layer on the rubberized asphalt sheet on which the nonwoven fabric layer is laminated, composite sheet waterproofing method. The method of claim 5, wherein The rubberized asphalt sheet is laminated to a thickness of 2-3mm, The nonwoven fabric has a density of 50 ~ 150g / m ² , The solvent-free urethane waterproof coating layer is a composite sheet waterproofing method, characterized in that laminated to a thickness of 2 ~ 3mm.

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