KR20110038410A - Fast-curing polyurea complex sheets for water-proofing and water-proofing/anti-root and coating method using the same - Google Patents

Abstract

PURPOSE: Fast-curing polyurea complex sheets are provided to realize waterproofing thin film less than 1mm using various polymeric films and fast-curing polyurea and to reduce the load applied to a structure by anti-root polymeric films. CONSTITUTION: A fast-curing polyurea complex sheet comprises a first polymeric film layer and a fast-curing polyurea coating layer(30) formed on the first polymeric film layer. Both sides of the first polymeric film layer is corona-treated, wherein the both sides are a side applied with polyurea and an end part of the film layer.

Description

Waterproof and waterproof / waterproof super hard polyurea composite sheet and waterproof and waterproof / waterproof construction method using the same. {Fast-curing Polyurea Complex Sheets for Water-proofing and Water-proofing / Anti-root and Coating Method Using The Same}

The present invention relates to a waterproof and waterproof / anti-root ultrafast polyurea composite sheet, and a waterproof and waterproof / rootproof construction method using the same, and more particularly, to polymers such as PP or PETE films. Regarding the construction method of the composite sheet for imparting waterproofing and waterproofing / waterproofing performance to the waterproofing and waterproofing / waterproofing super fast carbide polyurea composite sheet and structure comprising a film layer and a superfine polyurea coating layer formed on the film layer will be.

Ultrasonic carbide polyurea resin has high mechanical strength, elasticity, acid resistance, alkali resistance, chemical resistance, etc., and because of its fast curing speed, it can be installed in a short period of time and can be constructed even in winter. It is widely used as waterproofing / reinforcing materials for structures exposed to environmental conditions.

However, the superhard polyurea resin is very expensive raw material itself, and the construction by the normal high pressure spray method causes problems such as pinholes due to eddy currents and the presence of fine obstacles or dust when colliding with the structure. do. On the other hand, in order to solve this problem, the construction of excessive thickness is inevitable, and the average cost of 30-35% or more of the loss of the construction is limited due to the high construction price.

In order to overcome this limitation, the Republic of Korea Patent No. 10-0324364 discloses a technique for producing a sheet using a polyurea, nonwoven fabric, reinforcing fiber and using it in a waterproofing method. However, this technology has a limitation of polyurea coating due to the presence of non-woven fabric or reinforcing fiber. Therefore, it has limitation in controlling thickness of polyurea coating, possibility of poor adhesion between layers, and rising sheet manufacturing cost due to complicated production process. . In addition, by forming a fine pinhole in the coating film as a method of removing the bubbles generated from the bottom in forming the coating layer of the polyurea, water tightness is inhibited in the harsh conditions such as continuous exposure to moisture during rooftop greening Can cause.

      In recent years, the waterproofing method of the structure, in particular, the waterproofing method of the rooftop, has greatly increased the importance of the rooting function associated with the rooftop recording. As the interest increases, a lot of research is being conducted on waterproof / corrosive materials and construction methods. Among them, a representative waterproof / corrosion method currently used is more commonly applied in Japan or Europe, and the asphalt or rubber-modified asphalt waterproof layer as described in Korean Patent No. 10-0872127 and 2003-0028286 is disclosed. For the purpose of providing the anti-corrosion properties, a method of utilizing a PVC sheet or a PETE sheet is typically used. Separately, a method of manufacturing a sheet using a polyurethane, PVC, and inorganic waterproofing agents as a waterproofing layer, and using a copper sheet or a polymer sheet made of aluminum or copper as a waterproofing layer has been introduced. There is also a method of manufacturing the waterproof layer and the waterproof layer into one sheet.

However, this technique of techniques for construction additionally the waterproof layer and the discharge mp are, in the case of the asphalt waterproof 80 ~ 130kg / m ^3, when the synthetic resin film resistant 50 ~ 80kg / m ³ in a waterproof construction itself load per unit area applied to the rooftop It is very high and is a factor to increase the load of the structure.

      In addition, as a method of bonding between sheets for waterproofing or waterproofing / proofing, a heat fusion method and an adhesive and a tape adhesion method are used. However, these methods frequently cause poor adhesion problems. The problem of damaging the waterproofing layer due to the penetration of plant roots remains as a cause of defects, such as several research papers. In addition, in the production of waterproof / corrosive sheets, methods of adhering heterogeneous materials with adhesives are used, but they also have problems of coating damage due to poor adhesion.

In addition, the adhesives used for the construction of these waterproofing agents or for attaching various sheets to the structure are used as a cause of environmental pollution because they use a large amount of organic solvents. It is becoming.

The present invention is to solve the problems of the prior art, one object of the present invention by using a variety of polymer-based film and super-speed polyurea to realize a thin coating film thickness of less than 1mm, and also excellent polyurea waterproof By using specially treated waterproof polymer-based film, it is possible to reduce the load on the structure as much as possible, to give economical and convenience in construction, and to minimize the causes of rapid construction and defects. It is to provide a composite sheet.

Another object of the present invention is to use the composite sheet as described above, by using an environmentally friendly adhesive as an adhesive, having an acid resistance, alkali resistance, chemical resistance, high adhesion and mechanical strength, the weather resistance, excellent waterproof and waterproof performance and economical It is to provide a waterproof and waterproof / waterproof construction method without the problem of environmental pollution.

One aspect of the present invention for achieving the above object, comprises a first polymeric film layer and a super-speed polyurea coating layer formed on the first polymeric film layer, the first polymeric film layer The present invention relates to a waterproof ultra-high speed polyurea composite sheet in which both sides of a polyurea are coated and both sides of a predetermined portion of a film layer end are corona treated.

According to another aspect of the present invention for achieving the above object, a second polymer film layer is further laminated on the first polymer film layer, and a polyurea coating layer is formed on the second polymer film layer. The polymer-based film layers are formed on the surface on which the polyurea is applied and on both sides of the end portion of the film layer in a corona-treated waterproof / pervious superhard polyurea composite sheet.

The second polymer film layer according to an embodiment of the present invention is PP, PVA, HDPE, LDPE, PVC, LLDPE, PETE or oxidation-treated aluminum and polyvinyl, which have enhanced antibacterial, antioxidant and hydrolysis resistance. Characterized in that it comprises one or more of the composite film of alcohol.

Another aspect of the present invention for achieving the above object is to install the waterproof composite sheet or waterproof / waterproof composite sheet on the bottom surface, between the composite sheet and the composite sheet and between the composite sheet and the bottom surface It relates to a waterproof and waterproof / waterproof construction method characterized in that the adhesive with a polyurea adhesive.

The slow-drying polyurea adhesive according to one embodiment of the present invention is characterized in that it comprises a moisture-reactive latent curing agent of at least one of oxazolidines and aldimines.

The waterproof and waterproof / waterproof composite sheet according to the present invention can significantly reduce the load applied to the structure by light weight by thin coating construction, and has excellent toughness to light weight thin film to prevent damage to the film due to deformation of the structure It is possible to reduce the occurrence of defects, it is possible to effectively exhibit the waterproofing and waterproofing characteristics without deterioration of the coating film properties due to constant moisture and various microorganisms and the resulting poor durability.

In addition, the waterproofing and waterproofing / corrosion construction method according to the present invention exhibits excellent performance even in the inter-sheet adhesion sites that are structurally vulnerable to the expression of rooting performance. The problem of environmental pollution that may be caused by the solution is also solved, and there is an effect of obtaining excellent environmental friendliness.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known general functions or configurations will be omitted.

1 is a cross-sectional view of a waterproof super hard cloth polyurea composite sheet according to an embodiment of the present invention, Figure 2 is a cross-sectional view of a waterproof / waterproof super hard carbide polyurea composite sheet according to an embodiment of the present invention.

Referring to FIG. 1, the waterproof cemented carbide polyurea composite sheet according to an embodiment of the present invention may be formed of a superhard polyurea formed on a first polymer film layer 10 and the first polymer film layer 10. Including the coating layer 30, the first polymer film layer 10 has a surface coated with polyurea and both sides 20 of a predetermined section of the end of the film layer is corona treated.

Referring to Figure 2, the waterproof / waterproof super hard mirror polyurea composite sheet according to an embodiment of the present invention, the second polymer film layer 40 is further laminated on the first polymer film layer 10. And a polyurea coating layer 30 is formed on the second polymer film layer 40, and the polymer film layers 10 and 40 are formed on the surface and the end of the film layer where the polyurea is applied. Both sides of the section 20 are corona treated.

Hereinafter, the configuration of the superhard polyurea composite sheet will be described in more detail.

A) Polymer film

In the composite sheet according to the embodiment of the present invention, the first polymer film layer 10 for waterproofing purposes may use a universal polymer film such as polypropylene film without limitation in thickness. The polymer-based film layer 10 is corona-treated on both sides of the polyurea coated surface and a predetermined section of both ends of the film layer.

On the other hand, the second polymer-based film layer 40 for the purpose of rooting is specifically made of polyvinyl alcohol (PVA), polyethylene terephthalate (PETE), high-density polyethylene ( HDPE), low density polyethylene (LDPE), ultra low density polyethylene (LLDPE), polyvinyl chloride (PVC), polypropylene (PP) film and one or more of a composite film of oxidized aluminum and polyvinyl alcohol.

Preferably, the second polymer film layer 40 has a thickness of about 150 to 450 μm. When the thickness of the film layer 40 is 150㎛ or less, the weather-proof property is greatly reduced, the film may be damaged during corona treatment, and when the thickness is 450㎛ or more, workability in manufacturing a film may be poor.

Referring to FIG. 2 again, the polymer film layers 10 and 40 are preferably formed of a PETE, HDPE, LDPE or polyvinyl alcohol film 40 having a thickness of about 150 to 450 μm, and a PP film having a thickness of about 50 μm or less ( 10) It is good to use in combination with. The final manufactured film layers 10 and 40 are preferably subjected to corona treatment on both sides of the surface 20 to which the superfine polyurea is applied and both ends of the film 20 to 200 mm.

Corona treatment of the polymer film is carried out in two steps as follows. First, the film of the state rolled up on a roll is unwound, it puts into a corona treatment apparatus, and cross section corona treatment is performed with respect to a large area. Subsequently, a partial double-sided corona treatment is performed on the 20-200 mm edge of the film. However, the corona treatment of the film is not limited to the above method, and various methods known in the art may be used. The film subjected to the corona treatment in this way is immediately coated with a superhard polyurea to produce a composite sheet of the present invention.

B) Carbide Polyurea

In the composite sheet according to the embodiment of the present invention, the superhard polyurea may be one of pure polyurea and a soft, hard and hard polyurethane-urea hybrid type polyurea. The super hard polyurea is preferably 0.5 to 2% by weight of a hydrolysis inhibitor and an antimicrobial agent. In the absence of hydrolysis inhibitors and antimicrobial agents, durability may be degraded by continued contact with moisture and degradation by soil microorganisms.

The above-mentioned superhard polyurea is applied by using a special spray device of instant impact method in mixing and applying. At this time, in consideration of the reaction rate and flowability, the temperature of each composition should be maintained uniformly at 50 ~ 70 ℃, the discharge pressure is applied to adjust to 500 ~ 2500 psi. When the temperature of the composition is too low, the productivity due to the delay of curing time is poor, and when too high, the smoothness of the sheet due to blistering and curing shrinkage becomes poor.

The discharge pressure is preferably discharged at a low pressure of 500 to 1500 psi in order to prevent loss due to scattering after the composition impinges on the film and to minimize adsorption to portions other than the intended portion. In addition, the discharge pressure can be appropriately adjusted to maintain the properties of wettability, smoothness, etc. according to the type of film used.

Composite sheet according to an embodiment of the present invention may be formed with a total thickness of about 800㎛ ~ 3,000㎛, it can be produced by appropriately adjusted according to the type of planting material used for roofing greening.

Another aspect of the present invention relates to a method for waterproofing and waterproofing / rooting construction using the composite sheet according to the present invention. The construction method according to an embodiment of the present invention, the waterproof or waterproof / waterproof super hard diameter polyurea composite resin is installed on the bottom surface, between the composite sheet and the composite sheet and between the composite sheet and the bottom surface polyvinyl chloride It is characterized by bonding with urea adhesive.

3 is a cross-sectional view of the waterproof construction constructed in accordance with the method of the present invention. Referring to Figure 3 between the composite sheet and the composite sheet and the coating layer by the waterproof composite sheet comprising a waterproof polymer-based film layer 10 and a super-speed polyurea coating layer 30 on the concrete floor 50 A waterproof, dry-drying polyurea adhesive layer 60 is formed which does not contain copper powder applied between the sheet and the concrete floor. In addition, a general yellowing-free polyurethane-based top coat layer 70 is formed thereon.

Figure 4 is a cross-sectional view of the waterproof / waterproof construction constructed in accordance with the method of the present invention. Referring to Figure 4 and the coating layer by the waterproof / waterproof composite sheet comprising a waterproof / waterproof polymer-based film layer (10, 40) and a super-speed polyurea coating layer 30 on the concrete floor surface 50 and the A waterproof / proof dry-dry polyurea adhesive coating layer 60 including copper powder applied between the composite sheet and the composite sheet and between the composite sheet and the concrete floor is formed.

The construction method according to an embodiment of the present invention, first remove the impurities of the concrete bottom surface 50, and after laying the composite sheet according to the present invention on the bottom surface 50, the slow-drying polyurea adhesive It is made by applying (60) between the composite sheet and the composite sheet to a thickness of 500 ~ 1500㎛ between the composite sheet and the bottom surface (50).

The step of removing the impurities is a step of cleanly treating the latency or foreign matter in the concrete of the construction part of the structure, and repairing and reinforcing the cracked part. At this time, repair or reinforcement can be carried out using commercially available repair and reinforcement.

It is preferable that the thickness of the composite sheet is 1,300-1,800 µm thick when planting herbs, and 800-1,000 µm when planting herbs. In addition, the thickness of the slow-drying polyurea adhesive 60 is preferably applied to a thickness of 500 ~ 1,500㎛, preferably 1,000 ~ 1,500㎛.

Hereinafter will be described in more detail with respect to each composition of the slow-drying polyurea adhesive according to an embodiment of the present invention. The slow-drying polyurea adhesive may comprise a slow-drying polyurea base, a hardener and a powder. The slow-drying polyurea base, the curing agent, and the powder may be mixed in a weight ratio of 0.5 to 3.0: 1: 0.1 to 1.0. The ratio may be appropriately adjusted in consideration of economicality and workability according to the generality of the material or the treatment process, the expression properties of the waterproof / corrugated construction, and the discharge of environmental pollutants in the disposal process after use.

(1) slow dry polyurea motif

According to one embodiment of the present invention, the topic of the slow-drying polyurea includes various additives such as a slow-drying polyamine, a moisture-reactive latent curing agent, a coloring pigment, a filler, an antioxidant, a UV stabilizer, a hydrolysis inhibitor, an antibacterial agent, and an antifoaming agent. Include.

The polyurea main material, 50 to 80% by weight of the moisture-reactive latent curing agent, 5 to 30% by weight pigment, 5 to 20% by weight filler, 0.5 to 2% by weight antioxidant, UV stabilizer 0.5 to 2% by weight, 0.5 to 2% by weight hydrolysis inhibitor and 0.5 to 2% by weight of the antimicrobial agent.

In addition, the topic of the slow-drying polyurea may further include 0.1 to 3 parts by weight of antifoaming agents, precipitation inhibitors, wetting and dispersing agents that can be commonly predicted in the art.

(a) moisture-reactive latent curing agent

The moisture-reactive latent curing agent according to one embodiment of the present invention may use one or more of oxazolidines and aldimines. It is preferable to use the said latent hardening | curing agent whose active hydrogen equivalent weight is 150-2000, an acid value is 0.3 or less, and the average number of nitrogen functional groups is 2-3. More preferably, an acid value is 0.1 or less and it is good to use the thing of two nitrogen functional groups.

In addition, it is advantageous for the curing rate and the mechanical strength and elongation of the cured product to mix the latent curing agent in the range of 800 to 1200 with the latent curing agent in the range of 150 to 450.

(b) pigmented pigments

It is preferable that the pigment contains 5 to 30% by weight in the main material, titanium dioxide, sulfur oxides, iron oxides and the like can be used. However, it is preferable not to use heavy metal pigments known to be toxic.

(c) fillers

The filler may include hydrophobic amorphous silica and one or more selected from the group consisting of calcium carbonate, quicklime, calcium hydrogen carbonate, talc, and silica.

The filler may be used in 5 to 20% by weight of the subject, of which the content of the hydrophobic amorphous silica is preferably 0.5 to 2% by weight and other fillers 1 to 20% by weight.

(d) Stabilizers

The stabilizers include antioxidants, UV stabilizers, hydrolysis inhibitors and antibacterial agents, each stabilizer is preferably used within 0.5 to 2% by weight.

(2) slow-drying polyurea curing agent

The polyurea curing agent includes isocyanates and latent curing agents. Wherein the isocyanates are diphenylmethane diisocyanate (MDI) or prepolymers thereof, toluene diisocyanate (TDI) or prepolymers thereof, hexamethylene diiso cyanate (HDI) or prepolymers thereof and isophorone diisocyanate (IPDI) or its One or more of the prepolymers can be used.

The diphenylmethane diisocyanate (4,4`-diphenylmethane diisocyanate, MDI) may be a monomer MDI and polymerized MDI or MDI prepolymer, NCO% is 20 ~ 33%, the average number of functional groups is 2.3 ~ 3.0 It can be used as possible.

Toluene diisocyanate (TDI) or its prepolymer, hexamethylene diiso cyanate (HDI) or its prepolymer, and isophorone diisocyanate (IPDI) or its prepolymer or dimers or trimers thereof can also be used, in which case NCO% is used in the range of 4.5 to 15% average functional groups in the range of 2 to 3, and preferably used alone is advantageous in terms of mechanical strength and reaction rate control.

In the present invention, a latent curing agent may be used for controlling workability and crosslinking density of the product. As a latent curing agent, latent curing agents such as ethylene carbonate (EC) and propylene carbonate (PC) may be used alone or in combination. Can be used.

The polyurea curing agent may include 90 to 99.1 wt% of isocyanates and 0.1 to 10 wt% of a latent curing agent. The latent curing agent is preferably used in 0.1 to 5% by weight. If the latent curing agent is out of 0.1 to 10% by weight may cause problems of rapid hardening, poor smoothness and foaming of the final cured product.

(3) Powder for Slow Dry Polyurea Adhesive

      The above-mentioned dry-drying polyurea adhesive powder is prepared by including 100% by weight of copper powder, which is used in the final blending process to add the dry-proof property to the dry-drying polyurea adhesive by using the property of inhibiting the growth point of the plant. Mix.

      The powder is preferably used in 10 to 100 parts by weight based on the curing agent. When the powder is less than 10 parts by weight, the appearance performance of the weather is weak, and when it exceeds 100 parts by weight, the workability is poor and the hardness of the final cured product is difficult to cope with stretching of the structure appropriately.

The slow-drying polyurea adhesive is a mixture of the dry-drying polyurea resin and the powder by mixing the powder and then mixing the powder so that the dry-drying polyurea main ingredient and the slow-drying polyurea curing agent are sufficiently mixed. Stir as much as possible.

Hereinafter, the present invention will be described in more detail with reference to preferred examples and test examples of the present invention. However, the scope of the present invention is not limited to the examples.

Example 1; Preparation of Waterproof Composite Sheet

(1) production and surface treatment of polymer films for the manufacture of waterproof sheets

LDPE resin was extruded to prepare a film having a thickness of 50 μm, passed through a cooling roll, and passed through a wide corona treatment apparatus having a high frequency voltage of 42 dyne to prepare a film.

(2) Preparation of waterproof composite sheets of superhard polyurea / polymer films

Using a Gardura E-XP2 sprayer, SUPERTEX ^TM PU-100 (Ahae), a pure polyurea-based product in the superhard polyurea, was corona-treated LDPE film using a Gardura E-XP2 sprayer and a pressure of 1000 psi and a reactant temperature of 60 ° C. By using an MP gun (Mechanical purge gun) by spraying continuous film spraying to an average of 950㎛ to prepare a sheet having an average thickness of 1,000㎛.

Example 2; Manufacture of composite sheet for waterproof / waterproof

(1) production and surface treatment of polymer films

PETE resin having improved antimicrobial and hydrolysis resistance was extruded to prepare a film having a thickness of 150 μm, and they were extruded by corona treatment at a high frequency voltage of 45 dyne to prepare a film having a thickness of 300 μm. Then, a 50 μm-thick film made of PP resin was extruded and laminated in the same manner as above to prepare a polymer film for waterproof / pervious sheet production. Finally, the film was passed through a wide corona treatment device having a high frequency voltage of 42 dyne. Prepared.

(2) Production of composite sheets for waterproofing and waterproofing

Using a Gardura E-XP2 sprayer, SUPERTEX ^TM PU-100 (Ahae), a pure polyurea-based product in the superhard polyurea, was coated on a corona-treated PE-PETE triple film to a pressure of 1000psi. A composite sheet having an average thickness of 1,000 to 1,500 µm was prepared by spraying the film to an average of 650 to 1150 µm on a continuous viscous spray method with an MP gun (Mechanical purge gun) at a reaction temperature of 60 ° C.

Example 3; Preparation of Slow Dry Polyurea Adhesive

(1) Production of the subject for dry-drying polyurea adhesive

5% by weight of polyoxyethylenediamine (Jeffamine D-2000, product of Basf), 81% by weight of polyamine (JEFFLINK 754, product of Huntsman), 3% by weight of TiO ₂ as pigment, 1% by weight of dispersant, 2% by weight of antifoaming agent, As a filler, 1 wt% amorphous silica (Aerosil 200, Degussa), 3 wt% CaCO3, 1 wt% antioxidant, 1 wt% UV stabilizer, 1 wt% antibacterial agent, 1 wt% hydrolysis inhibitor were mixed.

(2) Production of curing agents for dry-drying polyurea adhesives

As the curing agent, hexamethylene diisocyanate (HMDI) and polyoxypropylene glycol (PP-2000, PP-3000 were mixed at a weight ratio of 50:50, respectively, polyol korea) and TMP (trimethylol propane, Bayer) The reaction was carried out to react NCO% to 13%, and 5% by weight of PC was used as a latent curing agent.

(3) powders for dry-drying polyurea adhesives

Copper powder (Shin Chemical Co., Ltd.) 100% by weight was used as the powder.

   The formulation of the slow-drying polyurea adhesive was 1: 1: 0.3 in a weight ratio of main body: curing agent: powder, and the main body and the curing agent were mixed first, and then the powder was mixed to form the adhesive composition of the present invention.

Example 4; Construction of waterproof and waterproof / waterproof composite sheet

(1) Construction of waterproof composite sheet

First, the waterproof sheet was applied to protrude the polyurea coating layer to the top, cut to fit, and then installed. Then, the adhesive sheet was bonded between the bottom of the connecting portion and the sheet and between the sheet and the sheet to form an integrated waterproof sheet. . After 3 hours, the general waterproof coating was completed by coating a general polyurethane-based coating. At this time, the formulation of the slow-drying polyurea adhesive to form the adhesive composition of the present invention with the main agent and the curing agent in a weight ratio of 1: 1.

(2) Construction of composite sheet for waterproofing / waterproofing

First, the waterproof / proof sheet is applied to protrude the polymer film to the upper part, cut to fit the size, and installed.Then, it is adhered using the adhesive composition between the bottom of the connection part and the sheet and between the sheet and the sheet. Sheet construction was formed. At this time, the formulation of the slow-drying polyurea adhesive is a weight ratio of 1: 1: 0.3 in a weight ratio of a main agent, a curing agent, and a main agent and a curing agent, and then powders are mixed to form an adhesive composition of the present invention.

Example 5

Preparation of the polymer-based film and the composite sheet and waterproof and waterproof / corrosion construction were carried out in the same manner as in Examples 1 to 4, except that the superhard polyurea used in the manufacture of the composite sheet was a hard polyurethane-urea hybrid product. Composite sheets were prepared using SUPERTEX ^™ 003 (Ahae).

Example 6

Preparation of the polymer-based film and composite sheet and waterproof and waterproof / corrosion construction were performed in the same manner as in Examples 1 to 4, except that the superhard polyurea used in the manufacture of the composite sheet was a soft polyurethane-urea hybrid product. Composite sheets were prepared using SUPERTEX ^™ 003-KS (Ahae).

Comparative Examples 1-7

Currently exposed urethane-based waterproofing agent (Comparative Example 1), non-exposed urethane-based waterproofing agent (Comparative Example 2), PVC waterproofing sheet (Comparative Example 3), improved Alast waterproof sheet B (Comparative Example 4) , EVA waterproof sheet (Comparative Example 5), ECB-based waterproof sheet (Comparative Example) 6), EPDM rubber waterproof sheet (Comparative Example 7) was used as a waterproof material.

Comparative Examples 8-11

PE / EVA composite sheet (comparative example 8), PVC / polyester fabric sheet (comparative example 9), aluminum / asphalt composite sheet (comparative example 10), PVC / PET composite sheet which are currently generally used as rooftop waterproof / corrosion materials (Comparative Example 11) was used as a waterproof / proof material.

Test Example 1 Curing and Physical Property Tests of Polymeric Film / Ultrafine Polyurea Composite Sheet and Composition of Each Example

      The physical properties of the composite sheet composed of the composition exemplified above were tested as follows.

1) Contact drying time (25 ℃):

2) Property test of PP film / Ultrahard Polyurea composite sheet (waterproof sheet) (1mm)

    3) Property test (1mm) of PP-PETE film / Ultra-speed polyurea composite sheet (waterproof / waterproof sheet)

4) Physical testing of the slow-dry polyurea adhesive and its composite sheet (1mm)

Test Example 2 Comparative Experiment of Physical Properties of Waterproofing Material and Waterproofing Sheet

The results of KS F 3211 or KS F 4911 physical property test on existing representative waterproofing materials and waterproof sheets (Comparative Examples 1 to 8) are as follows.

Test Example 3. Waterproofing / Waterproofing Test

The results of the weather resistance test on the existing representative waterproof / proof construction (Comparative Examples 8-11) are as follows.

The test vessel was made by installing an inner container (700 X 700 X 200; punched iron plate) and an outer container (800 X 800 X 250; regular iron plate), and the Pleioblastus pygmaeus was used as the herb and the Pyracanta was used as the wood. Pyracantha angustifolia was selected and tested in each of two test groups.

As can be seen in the table, the waterproof and waterproof / waterproof composite sheet according to the present invention has excellent mechanical strength compared to the waterproof or waterproof / waterproof composite sheet of other materials, so as to shrink and expand or warp the structure, etc. It has excellent durability, and is excellent in acid resistance, alkali resistance and resistance to various organic materials, and can show excellent performance even when roofing greening construction in which various substances such as moisture and fertilizer are present in excess. Due to this, it is possible to construct a thin thickness, which reduces the load on the roof during green roofing, and provides a more stable waterproofing and waterproofing / proofing construction by providing a method of lamination between sheets that can minimize the occurrence of defects quickly. To provide.

      In addition, in the case of other sheets, various plasticizers or high boiling point solvents are applied to increase the flexibility of the sheet. However, the polyurea of the present invention does not use such plasticizers, thereby preventing environmental pollution from the eluted materials. It is possible to improve, and provides a waterproof and waterproof / waterproof construction that does not have to worry about changes in the properties of the sheet over time due to elution of such plasticizers.

1 is a cross-sectional view of a waterproof composite sheet formed by one embodiment of the present invention.

Figure 2 is a cross-sectional view of a waterproof / waterproof composite sheet formed by one embodiment of the present invention.

3 is a cross-sectional view of the waterproof construction results by the construction method according to an embodiment of the present invention.

Figure 4 is a cross-sectional view of the waterproof / waterproof construction results by the construction method according to an embodiment of the present invention.

Explanation of symbols for the main parts of the drawings

10: polymer film (thin film)

20: corona treatment

30: superhard polyurea coating layer

40 polymer film (thick film; for rooting)

50: concrete floor

60: slow-drying polyurea adhesive coating layer

70: yellowing-free polyurethane-based top coat layer

Claims (10)

It comprises a first polymeric film layer and a super-speed polyurea coating layer formed on the first polymeric film layer, The first polymer-based film layer is a super-speed polyurea composite sheet in which both sides of a predetermined section of the surface and the end of the film layer is coated with polyurea. The method of claim 1, wherein the composite sheet further comprises a second polymer film layer between the first polymer film layer and the polyurea coating layer, The polymer-based film layer is a super-speed polyurea composite sheet in which both sides of the polyurea is applied and a predetermined portion of the end of the film layer is corona treated. The method of claim 2, wherein the second polymer film layer is PP, PVA, HDPE, LDPE, PVC, LLDPE, PETE or the oxidation-treated aluminum and polyvinyl alcohol of enhanced antibacterial, antioxidant and hydrolysis resistance A superhard polyurea composite sheet comprising at least one of the composite films. According to claim 2, wherein the second polymer-based film layer is a super-speed polyurea composite sheet having a thickness of 150 ~ 450㎛. The superhard polyurea composite sheet according to claim 1 or 2, wherein the superhard polyurea is one of pure polyurea and a soft, hard or hard polyurethane-urea hybrid polyurea. A method of waterproofing and waterproofing / proofing construction, wherein the composite sheet of claim 1 is installed on a bottom surface, and the composite sheet and the composite sheet are bonded to each other and between the composite sheet and the bottom surface with a dry-dry polyurea adhesive. The method of claim 6, wherein the construction method further comprises applying a polyurea top coat on the polyurea coating layer with the polyurea coating layer facing the upper surface in the case of waterproof construction. . The method of claim 6, wherein the construction method is waterproof and waterproof / waterproof / waterproof construction method characterized in that the polyurea coating layer facing the bottom surface. 7. The method of claim 6, wherein the slow-drying polyurea adhesive comprises at least one moisture-reactive latent curing agent of oxazolidines and aldimines.  The method of claim 6, wherein the slow-drying polyurea adhesive includes 10 to 100 parts / resin of copper in the case of waterproof / proofing construction.

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