KR101284615B1 - Method for complex waterproofing using by polyurethane composition - Google Patents

Abstract

PURPOSE: A complex waterproofing construction method using polyurethane composite is provided to allow a user to conveniently perform waterproofing construction and to improve waterproofing performance by using the polyurethane composite in a rubberized asphalt waterproof sheet. CONSTITUTION: A polyurethane waterproof layer (110) is constructed on a corner in which a wall and a horizontal unit meet, and urethane sealant (130) is constructed. A rubberized asphalt waterproof sheet (120) is constructed in order to be overlapped with the polyurethane waterproof layer. A tape is attached to a connection unit of the rubberized asphalt waterproof sheet.

Description

Method for complex waterproofing using by polyurethane composition

The present invention relates to a composite waterproof construction method using a polyurethane composition, and more particularly to a composite waterproof construction method using a polyurethane composition that does not affect the physical properties of rubberized asphalt.

Due to the development of building technology and civil engineering technology, various kinds of waterproofing techniques and technologies such as sheet waterproofing, concrete waterproofing, coating waterproofing, asphalt waterproofing, metal sheet waterproofing and improved asphalt sheet waterproofing have been developed. However, according to the construction method, there are problems of each feature and specification.

These problems include differences in effects after construction, labor costs during reconstruction, ease of construction, aging and deterioration due to ultraviolet rays, absorbency and water repellency problems, and adhesion problems with adhesives. Convenience and economy are emerging as problems in the building repair industry and the waterproof industry.

On the other hand, the sheet waterproofing method of the waterproofing method is a method of manufacturing a material having a waterproof performance in the form of a sheet having a certain thickness and width to adhere to the waterproof surface at the construction site to form a waterproof layer.

Sheet waterproofing method is easy to implement the necessary physical properties through the various laminated structure in the manufacture of the sheet, there is a convenient construction, but it is difficult to construct a complex part, difficult to repair the part, it is difficult to achieve a full water tightness in the seam between sheets, There is a problem that the sealing work of the seams between sheets is done manually by hand, so that various sheets and methods using the same have been researched and developed to overcome them.

And there is a variety of methods depending on the type of coating waterproof method, the most widely used polyurethane waterproof method.

Polyurethane waterproofing method is to clean the floor to be installed, apply a primer to the floor enough to penetrate and dry, then apply a liquid polyurethane resin on the floor to dry and harden to form a polyurethane coating film of a certain thickness It is a way to waterproof.

The polyurethane waterproofing method is excellent in elasticity, so it can maintain a certain degree of waterproof performance against cracks in the lower limbs, and is relatively easy to install in a narrow place or a complicated part, and can be seamlessly repaired and relatively easy to repair. There is an advantage.

However, since the close contact method is in close contact with the ground surface such as concrete surface, it is difficult to fundamentally solve the crack of the ground, and when the crack occurs, the polyurethane coating film is damaged, and there is a problem that it is continuously lifted up.

In addition, since the coating is applied in a liquid phase in the working phenomenon is good flowability can be uneven thickness due to the bending of the bottom surface, the thickness of the coating film should be formed sufficiently, but there is a problem that is not easy in the field construction.

Meanwhile, in recent years, in order to maximize the advantages of the sheet waterproofing method and the polyurethane waterproofing method and supplement the disadvantages, various waterproof construction methods using the sheet waterproofing method and the polyurethane waterproofing method have been developed and applied.

However, when the rubberized asphalt waterproof sheet, which is widely used in the sheet waterproofing method, is applied together with the polyurethane waterproofing method to construct the composite waterproofing method, the rubberized asphalt waterproofing sheet is dissolved by the plasticizer or solvent component contained in the polyurethane to be waterproofed. There is a problem that does not perform performance.

In order to solve the conventional problems as described above, the present invention proposes a composite waterproof construction method using a polyurethane composition that can also be used for rubberized asphalt waterproof sheet.

In addition, it is also possible to use a rubberized asphalt waterproof sheet to propose a composite waterproof construction method using a polyurethane composition to enable the construction of a composite waterproof to apply a rubberized asphalt waterproof sheet and a polyurethane coating waterproof.

Still other objects of the present invention will be readily understood through the following description of the embodiments.

In order to achieve the above object, according to an aspect of the present invention there is provided a composite waterproof construction method using a polyurethane composition.

According to a preferred embodiment of the present invention, in the composite waterproof construction method, comprising: constructing a polyurethane waterproof layer; Constructing a rubberized asphalt waterproof sheet to overlap at least a portion of the polyurethane waterproof layer; And attaching a tape to the connection portion of the rubberized asphalt waterproof sheet, wherein the polyurethane waterproof layer formed includes 10 to 50% by weight of isocyanate compound and 50 to 90% by weight of polymer polyol. Provided is a composite waterproof construction method, which is constructed using a polyurethane composition comprising a subject matter and a curing agent comprising a polymer polyol, a chain extender, and a filler.

In the step of constructing the polyurethane waterproofing layer, the polyurethane waterproofing layer may be constructed only at the corner portion where the wall and the horizontal portion where the waterproofing layer is constructed meet.

In addition, the urethane sealant may be further constructed after the polyurethane waterproof layer is applied to the corner portion where the wall and the horizontal portion where the waterproof layer is constructed meet the polyurethane waterproof layer.

The tape may be to form a membrane (membrane) in the form of a film and to include an adhesive layer on at least one surface.

After performing the step of constructing the rubberized asphalt waterproof sheet to overlap at least a portion of the polyurethane waterproof layer may be further constructed a protective layer on top of the rubberized asphalt sheet.

As described above, according to the composite waterproof construction method using the polyurethane composition according to the present invention, the rubberized asphalt waterproof sheet also has the advantage that the composite waterproof construction can be used by using the polyurethane composition.

In addition, the polyurethane can also be used in the rubberized asphalt waterproof sheet, the rubberized asphalt waterproof sheet and the polyurethane coating is applied to the waterproof together has the advantage of excellent waterproof performance and easy construction.

1 is a cross-sectional view of a structure constructed a composite waterproof construction method using a polyurethane composition according to an embodiment of the present invention.
Figure 2 is a flow chart showing the sequence of performing a composite waterproof construction method using a polyurethane composition according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and a duplicate description thereof will be omitted.

First, the polyurethane composition used in the composite waterproof construction method according to the present invention will be described.

The polyurethane composition used in the composite waterproof construction method according to the present invention may be a two-component type composed of a main agent and a curing agent.

The subject consists mainly of isocyanate compounds, polymer polyols.

Isocyanate compounds include 2,4-toluene diisocyanate, toluene diisocyanate (TDI) such as 2,6-toluene diisocyanate, and methylene diphenyl di-isocyanate (MDI). , Hexa Methylene Di-isocyanate (HDI), Isophorone Di-isocyanate (IPDI), and the like, may be used alone or in combination thereof.

Generally considering the commerciality and the like, it may be preferable to use toluene diisocyanate (TDI), methylene diphenyl diisocyanate, methylene diphenyl diisocyanate is modified as well as pure methylene diphenyl diisocyanate (pure-MDI) Methylene diphenyl diisocyanate (modified-MDI) or methylene diphenyl diisocyanate polymer (polymer-MDI) may be used, but is not limited thereto.

The polymer polyol may be a polyether polyol, a polyester polyol, or the like, and more preferably, a polyether polyol having a molecular weight of 1,000 to 4,000 having good water resistance, excellent elasticity, and excellent wear resistance. .

In addition, polybutadiene diol, polytetramethylene ether diol, polypropylene oxide diol and triol, polybutylene oxide diol and triol Etc. can be used.

On the other hand, the conventional waterproof polyurethane composition includes a plasticizer (plasticizer) to give the flexibility and elasticity of the polyurethane.

Commonly used plasticizers include dioctyl phthalate (DOP), diisononyl phthalate (DINP), dioctyl adipate (DOA), and trioctyl tridecyl trimellitate (TOTM). ), Dibutyl phthalate (DBP), diisodecyl phthalate (DIDP: diisodecyl phthalate), dioctyl malate (DOM), diisononyl adipate (DINA) and the like are used.

In addition, as a diluent for adjusting the viscosity of polyurethane, benzene, toluene, xylene, and the like, commonly referred to as BTX, are used alone or in combination.

However, these plasticizers and diluents such as benzene, toluene, and xylene were found to dissolve the rubberized asphalt waterproof sheet when used in the rubberized asphalt waterproof sheet.

Therefore, the plasticizer and the diluent are not used in the polyurethane composition for the composite waterproof construction method according to the present invention.

On the other hand, without including the plastic material and diluent, it should be able to exhibit the same waterproof performance or more than the conventional waterproof performance compared to the conventional.

For this purpose, the polyurethane is used in the composite waterproof construction method according to the present invention by blending the isocyanate compound and the polymer polyol in an amount of 10 to 50% by weight and 50 to 90% by weight of the polymer polyol based on the total weight of the main part, respectively. Synthesize the subject of the composition.

When tested by various compounding ratios, it is impossible to provide the required physical properties as a waterproofing material when it is out of such a compounding amount, and the reaction rate may be too fast to cause problems in the field. It is preferable to mix | blend.

Next, look at the curing agent constituting the polyurethane composition used in the composite waterproof construction method according to the present invention with the subject.

The curing agent may be synthesized by blending a chain extender, a filler, a pigment, a catalyst, an additive, and the like with the polymer polyol.

First, the polymer polyol may be a polyether polyol, a polyester polyol, or the like. Preferably, a polyether polyol having a molecular weight of 1,000 to 4,000 having good water resistance, excellent elasticity, and excellent wear resistance may be used.

In addition, polybutadiene diol, polytetramethylene ether diol, polypropylene oxide diol and triol, polybutylene oxide diol, triol and the like can be used.

The chain extender may use an aliphatic diol or diamine having a molecular weight of about 50 to 300 in order to increase the bondability of each component to provide excellent physical properties such as wear resistance and hardness.

Specifically for aliphatic diols, for example, ethylenediol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,2-propanediol, 1,3 -Butanediol, 2,3-butanediol, 1,3-pentanediol, 1,2-hexanediol, 3-methylenepentane-1,5-diol, 1,9-nonanediol, 2-methyloctane-1 Diols, such as 8-diol and 1, 4- cyclohexane dimethanol, can be used.

In the case of diamine, isophoronediamine, ethylenediamine, 1,2-propylenediamine, 1,3-propylenediamine, N-methylpropylene-1,3-diamine, N, N'-dimethylethylene diamine, 4,4- Methylene-bis-2-chloroaniline, isobutyl-3,5-diamino-4-chlorobenzoate, trimethylene glycol-di-P-aminobenzoate, 4,4-methylene-bis-3-chloro- Diamines, such as 2, 6- diethyl aniline, 3, 5- dimethylsio-2, 4-toluenediamine, and 3, 5- diethyl toluene-2, 4-diamine, can be used.

On the other hand, it is preferable to use a diamine chain extender because it can relatively increase the reaction rate and improve the physical properties, but is not limited thereto.

As the filler, calcium carbonate which provides elasticity suitable for use in the waterproofing material may be used as the filler.

On the other hand, when the polyurethane composition used in the composite waterproof construction method according to the present invention is applied to the vertical surface construction site may be used a thixotropy reinforced filler to prevent flow.

As such thixotropic reinforcing fillers, powders obtained from amorphous silicon dioxide, bentonite or dimethyldioctadecyl ammonium salts can be used or calcium carbonate treated with fatty acid metal salts can be used.

In particular, calcium carbonate treated with a fatty acid metal salt is preferable for the flow preventing action to be applied to the vertical construction site, but is not limited thereto.

Pigments may be used to select a pigment of a suitable color according to the use of the flooring, according to the needs of the consumer, to produce the color of the product.

Particularly, in the present invention, a pigment having a suitable color may be selected and used among inorganic pigments having low price and excellent weatherability.

As the catalyst, acid catalysts, metal catalysts, and the like generally used in polyurethane flooring compositions can be used.

Moreover, a dispersing agent, an ultraviolet stabilizer, an antifoamer, a sedimentation inhibitor, a water absorbing agent, etc. can be used as an additive.

Particularly, it is preferable to use a defoaming agent to suppress foaming.

As the antifoaming agent, a silicone antifoaming agent suitable for polyurethane is preferable. For example, Airex931 (Tego chemie), BYK-066N (BYK chemie), EFKA2020 (EFKA) can be used.

On the other hand, each component constituting the curing agent is 10 to 50% by weight of polymer polyol, 0 to 5% by weight of chain extender, 40 to 80% by weight of filler and 1 to 5% by weight, respectively, based on the total weight of the curing agent. , 0.1 to 1% by weight of additives and 0.1 to 2.0% by weight of catalyst.

In addition, a mixed polyurethane composition may be used as the waterproofing material by mixing the main material and the curing agent in a weight ratio in the range of 1: 1 to 1: 8.

According to the polyurethane composition used in the composite waterproof construction method according to the present invention, unlike the conventional polyurethane composition for waterproofing, it does not contain a plastic material and a diluent and does not react at all with rubberized asphalt.

Therefore, it is possible to apply the polyurethane waterproofing to the rubberized asphalt waterproof sheet that is currently widely used as a waterproof sheet in the composite waterproof construction method according to the present invention.

Hereinafter, a composite waterproof construction method according to a preferred embodiment of the present invention will be described with reference to FIGS. 1 and 2.

First, Figure 1 is a cross-sectional view of the structure of the composite waterproof construction method according to an embodiment of the present invention.

As shown in Figure 1, the cross-section of the structure of the composite waterproof construction method according to an embodiment of the present invention is composed of a polyurethane waterproof layer and rubberized asphalt sheet using the polyurethane composition used in the present invention largely do.

In particular, as shown in Figure 1, at the corner portion where the wall and the slab meet, the polyurethane waterproof layer using the polyurethane composition according to the present invention is first formed, and the horizontal portion attaches a self-adhesive rubberized asphalt sheet to form a waterproof layer.

In addition, it is possible to reinforce the polyurethane composition according to the present invention at the portion where the corner portion and the rubberized asphalt sheet overlap.

On the other hand, in the corner portion, it is also possible to additionally install the urethane sealant after the polyurethane waterproofing layer construction for the reinforcement of the waterproofing layer and to partially overlap the rubberized asphalt sheet.

In addition, the reinforcement of the overlapped corner portion and the rubberized asphalt sheet can be used not only the polyurethane composition used in the present invention but also a tape in which a membrane is formed in the form of a film or sheet and an adhesive layer is formed on at least one surface thereof. Do.

Meanwhile, in FIG. 1, the polyurethane waterproofing is applied only to the corner portion and only the rubberized asphalt sheet is applied to the corner portion for reinforcement of the corner portion. However, the polyurethane waterproofing layer is also applied to the horizontal portion and rubberized on the upper portion thereof. It is also possible to attach asphalt waterproof sheets.

In addition, although it is shown that the rubberized asphalt waterproof sheet is not installed in the corner portion or the vertical portion, it is obvious that it is possible to construct the rubberized asphalt waterproof sheet in such a portion.

In addition, after the rubberized asphalt waterproof sheet is first constructed, it is also possible to construct a polyurethane waterproof layer using the polyurethane composition used in the present invention thereon.

On the other hand, the rubberized asphalt waterproof sheet is preferably a sheet in which rubberized asphalt adheres to a high density polyethylene film (HDPE) that is overlapped in two directions and overlapped in two directions. Material having physical properties such as].

[Table 1]

In addition, the polyurethane composition used in the present invention is preferably a composition satisfying the specifications of the coating film waterproofing agent according to KS F4910 may be a material having physical properties as shown in Table 2 below.

[Table 2]

Meanwhile, although not shown in FIG. 1, a protective layer may be additionally installed to protect the rubberized asphalt waterproof sheet.

This protective layer combines improved bitumen and special aggregates between two layers of strong asphalt for civil engineering, depending on the application. By compressing a waterproof protective plate manufactured to have a weight of 7.8 kg in a size of 1.0m x 2.0m in 3mm thickness or construction of cement mortar of 35mm or more, in the case of construction can be cement mortar of 20mm or more in thickness, but is not limited thereto.

Hereinafter, the order in which the composite waterproof construction method according to the preferred embodiment of the present invention will be described with reference to FIG. 2.

Figure 2 is a flow chart illustrating a sequence performed by the composite waterproof construction method according to an embodiment of the present invention.

On the other hand, the composite waterproof construction according to an embodiment of the present invention shown in Figure 2 illustrates the case where the composite waterproof construction is present while the wall and the horizontal portion is present together and reinforce the waterproof performance, such as the corner portion.

Composite waterproof construction according to an embodiment of the present invention shown in Figure 2 first performs a surface treatment of the base surface to form a waterproof layer (S200).

Surface treatment of the base surface can be carried out according to standard specifications and the like.

For example, the surface should be firm and free of voids and protrusions, in accordance with standard specifications. oil. Dust and dirt should be removed before installation.

Do not install the concrete until it has been properly cured and dried for at least seven days. Tie-rod holes are filled with concrete and the surface around them is smooth.

In addition, pores of at least 13 mm in the longitudinal direction or at least 6 mm in the depth direction should be filled and trimmed.

And the concrete is removed from the outer surface and removed with a solid exposed layer, and the irregular surface generated from the expansion joint makes a suitable surface.

On the other hand, joints and corners, such as construction joints can be carried out by filling with the polyurethane composition used in the present invention.

When such a surface treatment is completed, first construct a waterproof layer using the polyurethane composition used in the present invention (S202).

The construction of the waterproof layer using the polyurethane composition may be preferably applied only to a part of the wall and the floor as shown in FIG. 1.

On the other hand, the construction of the polyurethane waterproof layer to be constructed on the wall can be constructed in accordance with the following specifications.

First, since the polyurethane composition according to the present invention is a two-component type, it is used as a principle for mixing the main body and the curing agent in a separate container in a quantitative manner and mixing the same evenly for about 2 minutes.

It is preferable to pour the subject first in a separate container and then mix by pouring the curing agent over it.

As wall construction is difficult to form the coating film thickness, it should be applied at least twice to ensure minimum coating film thickness of 2mm or more.

Walls are constructed and at least 200mm from the walls to the floor to create rubberized asphalt sheets and joints.

When the construction of the polyurethane waterproofing layer is completed, the rubberized asphalt waterproof sheet is constructed after the primer applied to the bottom surface is completely dried (S204).

The construction of the rubberized asphalt waterproof sheet may be preferably applied only to the bottom portion, but is not limited thereto.

On the other hand, the construction of the rubberized asphalt waterproof sheet to be installed on the floor can be constructed in accordance with the following specifications.

When waterproofing the floor, it can be constructed according to the specification as follows.

The horizontal part is installed from the low part to the high part. The long side joint part of the sheet is installed by overlapping at least 50mm, and the overlap part is compacted with a roller or the like.

And the short side direction joint portion of the sheet is overlapped with at least 150mm construction and reinforce the connecting portion with a polyurethane composition or a separate sheet used in the present invention.

If the rainy season or the concrete curing time is less than a week, use a wet primer.

The seat attachment end and the T-joint are reinforced with the polyurethane composition, urethane sealant or the like according to the present invention.

After installation of rubberized asphalt waterproof sheet is completed, install a 100mm wide one-piece tape around the joint.

After constructing the rubberized asphalt waterproof sheet to the corners of the wall and the bottom surface on the polyurethane waterproof layer which is constructed at least 200 mm from the vertical portion to the horizontal surface, the finish is treated using the polyurethane composition according to the present invention.

On the other hand, when the construction of the waterproof layer by the rubberized asphalt waterproof sheet is completed as described above it can be additionally constructed a protective layer (S206).

According to the composite waterproof construction method according to the present invention, unlike the conventional polyurethane composition for waterproofing, the polyurethane composition according to the present invention does not contain a plastic material and diluent does not react with the rubberized asphalt waterproof sheet at all.

Therefore, by using a rubberized asphalt waterproof sheet which is widely used as a waterproof sheet, the polyurethane waterproof layer is also formed to form a composite waterproof construction to form a waterproof layer.

In addition, when the self-adhesive rubberized asphalt waterproof sheet, which can be directly attached to the rubberized asphalt waterproof sheet, is used for the composite waterproof construction by the so-called cold method, which does not require a separate heat treatment work for waterproofing in the field. It becomes possible.

In addition, due to the behavior and vibration response of the rubberized asphalt sheet and the performance of the HDPE film included in the rubberized asphalt sheet, the chemical resistance and the gas barrier can be exhibited.

In addition, while utilizing the advantages of such rubberized asphalt waterproof sheet, the construction of complex areas, which is a disadvantage of the conventional rubberized asphalt sheet, is difficult, partial repair is difficult, and the problem of achieving complete water tightness at the joints between sheets is polyurethane waterproof Complementary through, it shows excellent waterproof performance and workability.

It will be apparent to those skilled in the relevant art that various modifications, additions and substitutions are possible, without departing from the spirit and scope of the invention as defined by the appended claims. The appended claims are to be considered as falling within the scope of the following claims.

100: base surface 110: polyurethane waterproof layer
120: rubberized asphalt sheet 130: urethane sealant

Claims (5)

In the composite waterproof construction method,
Constructing a polyurethane waterproof layer at a corner portion where the wall and the horizontal portion meet, and further constructing a urethane sealant;
Constructing a rubberized asphalt waterproof sheet to overlap at least a portion of the polyurethane waterproof layer; And
Attaching a tape to a connection of the rubberized asphalt waterproof sheet,
The polyurethane waterproof layer formed is a poly-containing material comprising 10-50% by weight of an isocyanate compound and 50-90% by weight of a polymer polyol and a curing agent comprising a polymer polyol, a chain extender and a filler. Composite waterproof construction method characterized in that the construction using the urethane composition.
delete delete The method of claim 1,
The tape is a composite waterproof construction method characterized in that to form a membrane (membrane) in the form of a film and comprises an adhesive layer on at least one side.
The method of claim 1,
After constructing the rubberized asphalt waterproof sheet so as to overlap at least a portion of the polyurethane waterproof layer, the composite waterproof construction method further comprising a protective layer on top of the rubberized asphalt sheet.

Images