KR102008980B1 - Adhesive flexible type waterproof agent - Google Patents

Abstract

An object of the present invention is to improve the progress of solidification caused by deoiling phenomenon in the joint wall section of the underground structure, and to prevent the peeling phenomenon of the underground structure caused by the oil film phenomenon and the loss of waterproof performance due to the peeling phenomenon. To provide a waterproofing agent. Adhesive flexible waterproofing agent according to an embodiment of the present invention, the content of the rubber component, including butyl rubber, recycled butyl rubber and liquid rubber 30 to 55% by weight, carbon black and calcium carbonate, aluminum hydroxide, inorganic filler And 20 to 30% by weight of the at least one reinforcing filler selected from talc, 1 to 5% by weight of asphalt, and 20 to 35% by weight of a softener based on polybutene.

Description

Adhesive Flexible Waterproofing Agent {ADHESIVE FLEXIBLE TYPE WATERPROOF AGENT}

The present invention relates to an adhesive flexible waterproofing agent, and more particularly, to an adhesive flexible waterproofing agent which is a main material of butyl rubber, rubber asphalt, and adhesive flexible waterproofing sheet.

As is known, waterproofing agents can be classified in various ways depending on their materials. Among them, the self-supporting waterproof sheet may be divided into a butyl rubber waterproof sheet, a natural rubber waterproof sheet, a rubber asphalt waterproof sheet, and the like. The rubber asphalt waterproof sheet has been strengthened in consideration of the change in thickness due to impact, pressing layer load and long-term deoiling during the upper work.

Waterproof sheets contain a large amount of low-molecular materials and asphalt, which are inevitably used to secure self-adhesion performance. Therefore, low molecular weight materials or low molecular weight materials contained in asphalt cause deoiling and film formation. A fundamental solution is needed. Deoiling is also a major factor in loss of thickness and loss of waterproofing performance.

The crosslinking type waterproof sheet in which the rubber mixture is crosslinked in advance using a crosslinking compound is difficult to install due to its lack of self-adhesive performance, and may suffer from problems in joints and small holes during construction. To solve this, increasing the rubber content improves the waterproof performance or durability of the material. However, the adhesion strength that the material should have is reduced, making it unusable.

More specifically, the utilization of underground spaces has several difficulties in terms of architecture and civil engineering. The biggest difficulty among them is the groundwater treatment and securing waterproofing performance for underground structures.

Underground structures need to take countermeasures because they are continuously subjected to groundwater pressure and various underground chemical erosions. That is, when the groundwater penetrates into the underground structure to corrode the steel, the long-term durability of the underground structure is degraded. In addition, the comfort and usability of the underground user's internal user environment is degraded, resulting in a decrease in value.

In order to solve this problem, an external waterproofing method for constructing an adhesive or self-adhesive waterproof sheet or waterproofing agent to the outside of an underground structure is being actively applied. However, the external waterproofing method can only be applied in open cut construction where a waterproofing layer is installed on the outside of underground structures.

Building construction in dense areas such as urban areas is required for slurry wall or CIP (cast in place) in order to reduce the amount of construction space for underground work and to reduce construction cost and reduce civil complaints. A lot of earthquakes such as pile are used.

Moreover, the plywood construction method is activated. Plywood construction method after the construction of some structures (reinforcement and formwork), after the concrete is poured into the remaining method of the structure, and there is no separate space it is impossible to install a waterproof layer on the outside of the underground structure.

Due to this problem, there is a line waterproofing method that pre-installs the waterproof layer before the structure (reinforcement and formwork). The wire waterproofing method is a method in which a waterproof layer is attached to a plywood wall and maintains an insulation state in which a waterproof layer is not attached to a main structure (underground structure) requiring waterproofing. Therefore, when a leak occurs, the water penetrating the underground structure is spread all over.

Due to this problem, there is a composite sheet that induces direct attachment to the underground structure, and the adhesive flexible or sealing waterproofing agent based on asphalt. When a composite sheet having an asphalt content of about 40% or more is installed in an underground structure, deoiling occurs in which oil components in the asphalt are eluted with the passage of time. When de-oiling occurs, the flexibility and adhesion of the composite sheet are gradually lowered and solidified. Therefore, the waterproof performance is lost.

In addition, in order for the composite sheet to be directly attached to the underground structure, the adhesive layer of the composite sheet must be firmly attached to the underground structure even after curing of the poured concrete structure. However, the oil of the asphalt component is eluted to the adhesive layer to form an oil film on the adhesive layer surface, thereby preventing the adhesion to the concrete poured underground structure.

These prior arts, due to material limitations, it is difficult to secure watertightness in the joining section due to lack of long-term durability, lack of adhesion with the concrete structure in the field. Therefore, water leaks are generated in the sump section of the underground structure.

The object of the present invention is to improve the progress of solidification (loss of sealing function) caused by deoiling in the cement wall section of the underground structure, and to peel off the concrete structure of the underground structure caused by the oil film phenomenon, and to lose the waterproofing performance due to the peeling phenomenon. It is to provide an adhesive flexible waterproofing agent.

Adhesive flexible waterproofing agent according to an embodiment of the present invention, the content of the rubber component, including butyl rubber, recycled butyl rubber and liquid rubber 30 to 55% by weight, carbon black and calcium carbonate, aluminum hydroxide, inorganic filler And 20 to 30% by weight of the at least one reinforcing filler selected from talc, 1 to 5% by weight of asphalt, and 20 to 35% by weight of a softener based on polybutene.

When the total content of the rubber component is 100, the total content of butyl rubber and regenerated butyl rubber may be 60% by weight or more, and the content ratio of butyl rubber / regenerated butyl rubber may be 0.4 or more.

The butyl rubber may have a viscosity of 45 or less, and the liquid rubber may be a liquid isoprene rubber having a weight average molecular weight of 20000 to 30000.

The content of the rubber component may be 20 to 50% by weight of butyl rubber, 20 to 60% by weight of recycled butyl rubber, and 10 to 30% by weight of liquid rubber.

The polybutene may have a weight average molecular weight of 1000 to 2400, and the polybutene may be 60 wt% or more in the softener.

The remaining process oil in the softener may be within 5% by weight of the carbon black content and within 30% by weight of the butyl rubber and liquid rubber content in the rubber component.

The carbon black may account for at least 50% by weight of the total amount of the reinforcing filler.

The total amount of the carbon black and the reinforcing filler may be 0.7 to 1.3 times the total amount of the softener.

Adhesive flexible waterproofing agent according to an embodiment of the present invention may further include a homogenizer of 1 to 5% by weight of the rubber component content, and a tackifier of 1 to 5% by weight of the rubber component content.

The homogeneous agent includes an aromatic hydrocarbon and an aritic hydrocarbon, wherein the aromatic hydrocarbon and the aritic hydrocarbon are present in a range of 30:70 to 70:30, and 1 to 10% by weight of the total content of the rubber component. Can be.

The tackifier includes one of C5, C9 and phenolic, and may be 1 to 5% by weight of the total content of the rubber component.

Thus, according to one embodiment of the present invention, the content of butyl rubber, recycled butyl rubber and liquid rubber is 30 to 55% by weight, one selected from carbon black and calcium carbonate, aluminum hydroxide, inorganic fillers and talc 20 to 30% by weight, 1 to 5% by weight of asphalt, and 20 to 35% by weight of polybutene-based softener, thereby improving the solidification progress caused by deoiling in the lap wall section. It is possible to prevent the peeling phenomenon of the underground structure generated from the concrete ground and the loss of waterproof performance due to the peeling phenomenon.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like elements throughout the specification.

Underground structures should be protected from various deterioration factors in the underground environment to ensure durability in the long term. To this end, an external waterproofing method of directly applying or attaching a waterproofing agent to an underground structure has been applied.

In the case of urban construction and various infrastructure facilities in which underground wall sections are installed among underground structures, there are few wire waterproofing methods that can directly attach a waterproof layer to the structure, and there are many construction methods of insulation method.

In addition, even when the line waterproofing method is applied, asphalt series that generates deoiling and an upper oil film on the adhesive surface are frequently used. Therefore, it is difficult to secure watertightness even in the line waterproofing method.

When the underground structure or the waterproof layer and the underground structure that are kept insulated do not secure the adhesion firmly, the waterproof layer may be damaged by various physical and chemical deterioration factors.

In this case, inflow water such as groundwater is widely spread between the underground structure and the waterproofing layer in a short time with high water pressure, thereby deteriorating the concrete base forming the underground structure or corroding reinforcing steel present therein. As a result, durability of the underground structure is lowered, and safety is lowered structurally.

Therefore, an embodiment provides an adhesive flexible waterproof agent which minimizes the asphalt-based content and maximizes the rubber component having excellent mechanical properties. Adhesive flexible waterproofing agent may be applied to the line waterproofing method by forming a waterproof sheet.

The adhesive flexible waterproof sheet of the comparative example has a rubber content of about 10% and has a high content of asphalt series. Therefore, the waterproof sheet of the comparative example can not secure the adhesion with the pour concrete by forming the oil film by the elution of the oil on the adhesive surface when deterioration of the material due to the deoiling phenomenon and applying the line waterproofing method, it can cause various leakage defects.

Therefore, the embodiment minimizes the asphalt-based content and replaces it with rubber to fundamentally block the deoiling of the material itself, and solves the change in physical properties of the material due to the deoiling and the deterioration of adhesion with the poured concrete.

However, when the rubber component increases, the flexibility at room temperature or low temperature is relatively excellent, but when the asphalt-based waterproof sheet is heated to a high temperature during construction, it does not secure the adhesiveness.

In order to secure such tackiness, the butyl rubber waterproof sheet whose rubber component is the core uses a large amount of a low molecular softener or a tackifier. When the low molecular weight softener or tackifier is above the limit concentration, the butyl rubber waterproof sheet is accompanied by a phenomenon of contamination by a certain level of deoiling even though the adhesiveness is maintained.

That is, the butyl rubber waterproof sheet contains a lot of materials that can cause deoiling, although it is superior to asphalt-based waterproof sheets, but also causes deoiling.

However, the simple substitution of the asphalt-based content with the rubber content may improve the deoiling phenomenon, but may not satisfy even the basic performance of the waterproof sheet or the waterproofing agent. This simple replacement therefore makes it impossible to use the waterproof sheet. In other words, if the asphalt content is lowered and the rubber content is increased, the adhesion strength is significantly lowered.

As such, it is substantially very difficult to satisfy the trade-off balance of maintaining adhesion strength while preventing deoiling and film formation. One embodiment includes materials selected for many purposes from many rubber types and materials that can be used, such as rubber, and includes an optimal combination of selected materials.

In one embodiment, the adhesive flexible waterproofing agent has a rubber content of 30 to 55% by weight, a reinforcing filler content of 20 to 30% by weight, asphalt content of 1 to 5% by weight, and a softener content of 20 to 35% by weight. It includes, and further comprises a homogenizer and tackifier. Adhesive flexible waterproofing agent has an adhesive strength of 1.8 ~ 2.3 (N / m).

30 to 55% by weight of the rubber component allows to maintain the adhesiveness while increasing the content of the rubber component in the waterproofing agent. For example, the rubber component includes butyl rubber, recycled butyl rubber and liquid rubber (eg LIR 30).

When the rubber component is less than 30% by weight, the elastic force and mechanical properties are lowered, and when the rubber component is more than 55% by weight, the viscosity is too high, the formulation is difficult, and as the material is not dispersed, the overall physical properties are lowered.

Butyl rubber, recycled butyl rubber and liquid rubber included in the rubber component of one embodiment are different from the rubber components of the synthetic rubber, thermoplastic rubber, waste rubber powder applied to the conventional adhesive composite waterproof sheet.

Rubbers generally have viscoelastic properties over a fairly wide temperature range (eg -100 to 200 ° C) between solid and liquid phases. However, even if these basic properties are similar, the properties of the rubber are very different for each type of rubber, and there are hundreds of types of rubber.

Molecular weight, molecular weight distribution, and denaturation may result in different product properties for hundreds of rubbers. Rubber products with different characteristics are produced and sold even in the same series of rubbers.

Adhesive flexible waterproof agent of one embodiment maintains the adhesiveness while increasing the content of the rubber component. One embodiment includes an adhesive flexible composite waterproof sheet prepared by combining butyl rubber, recycled butyl rubber, and liquid rubber in a set ratio.

Butyl rubber is used as a waterproofing agent, and has excellent water and moisture permeability, and because of the low double bond, it has excellent waterproofing performance even in aging. However, when butyl rubber is used alone as a rubber component, the content of organic matter in the rubber component and the waterproofing agent may increase, or conversely, when the content of the organic matter is reduced, adhesiveness and sealing property may be greatly reduced.

Tackiness and sealing properties vary depending on the type and amount of the other additives added, but since the purpose and amount of the mixtures are set, it is necessary to appropriately combine the contents of the rubber components.

One embodiment has an optimum combination ratio of butyl rubber, butyl reclaimed rubber and liquid rubber through numerous tests. Liquid rubber has a rubbery property, but can significantly reduce the amount of material that causes deoiling in the past. For example, there are various types of liquid rubber, but in order to maintain adhesiveness and flexibility, it is preferable to use liquid isopran rubber, and it has excellent properties in terms of adhesion and compatibility.

As an example, when the total content of the rubber component is 100, the sum of the contents of butyl rubber and recycled butyl rubber is 60% by weight or more. If the sum of the contents of butyl rubber and recycled butyl rubber is less than 60% by weight of the rubber component, the permeability and durability of the butyl rubber are drastically lowered. And most of the liquid rubber is because of the relatively large double bonds or poor compatibility.

In addition, butyl reclaimed rubber is advantageous over butyl rubber in terms of cost and flexibility characteristics, but the content ratio of butyl rubber and butyl reclaimed rubber should be appropriately set because it is significantly lowered in terms of rubber stiffness. As an example, the content ratio of butyl rubber / regenerated butyl rubber is 0.4 or more, allowing cost and flexibility to be maintained while maintaining the rigidity of the rubber.

In addition, when the total content of the rubber component is 100, the content of the liquid rubber is 10 to 30% by weight, the content of the butyl rubber is 20 to 50% by weight, and the regenerated butyl rubber is 20 to 60%. In addition, it is necessary to carefully determine the type of butyl rubber and liquid rubber for flexibility of material usage and stability of performance.

Of the total content of the rubber component, the content of the liquid rubber of 10 to 30% by weight allows the rubber to have flexibility and mechanical properties. In other words, when the content of the liquid rubber is less than 10% by weight, the flexibility of the rubber is lowered, when more than 30% by weight mechanical properties are lowered and the economic efficiency is significantly reduced.

In addition, among the total content of the rubber component, the liquid rubber content of the lowest viscosity is 10 to 20% by weight, the most viscous butyl rubber is maintained at 30 to 40% by weight, and the remaining recycled butyl rubber is 40 to 60% It can be applied in weight percent. In this case, adhesion flexibility can be secured with economical efficiency.

Among the total content of the rubber component, the content of 20 to 50% by weight of butyl rubber may have the elasticity and mechanical properties of the rubber. That is, when the content of the butyl rubber is less than 20% by weight, the rubber itself does not sufficiently secure the same properties, the elasticity and mechanical properties are lowered, when the content of more than 50% by weight, the economic efficiency is lowered.

Among the total content of rubber components, the content of recycled butyl rubber 20 to 60% by weight can ensure the elasticity and physical properties of the rubber. When the content of the recycled butyl rubber is less than 20% by weight, the economic efficiency is significantly lowered. When the content of the recycled butyl rubber is more than 60% by weight, the quality of the rubber is deteriorated, it is difficult to secure the required quality, and the elasticity and physical properties are significantly reduced.

Butyl rubber enables the use of various butyl rubbers, but when the amount of liquid rubber used is relatively low, or when reinforcing fillers are used more, butyl rubber viscosity (125 ℃, Use low viscosity butyl rubber with less than 45). Low viscosity butyl rubber has a significant increase in its available width in terms of flexibility in the use of the material. As a result, it is possible to obtain a waterproofing agent of the desired physical properties while reducing the use of relatively expensive liquid rubber 10 to 15%. Therefore, it is easy to secure economic feasibility.

As an example, the liquid rubber includes a liquid isoprene rubber having a weight average molecular weight of 2000 to 30000. The weight average molecular weights 2000 to 30000 of the liquid rubber provide the blendability of the material according to the viscosity. When the weight average molecular weight of the liquid rubber is less than 2000, the viscosity becomes too low, and the effect as rubber is almost eliminated. When the weight average molecular weight is more than 30000, the mixing of the liquid rubber lowers the viscosity of the entire rubber component to ensure ease of blending. The effect is lowered and the economy is lowered.

If the weight average molecular weight of the liquid rubber is 10000 ~ 30000, leaching can be completely blocked, but the construction may be delayed because of the lack of flexibility. Therefore, in case of cold or low temperature, liquid rubber having a weight average molecular weight of 2000 to 5000 is used, and in the case of the tropics or outdoors, liquid rubber having a weight average molecular weight of 5000 to 10000 is used.

On the other hand, the content of 20 ~ 30% by weight of the reinforcing filler enables the dispersion of the material while maintaining the strength physical properties of the material in the waterproofing agent. For example, the reinforcing filler is selected from one or more of carbon black (eg, N660), calcium carbonate, aluminum hydroxide, inorganic fillers, and talc. Softeners are based on polybutenes.

If the content of the reinforcing filler is less than 20% by weight, the reinforcement to the mechanical properties of the material may not be made, so that the physical properties may be lowered. If the content of the reinforcing filler is more than 30% by weight, the dispersion of the material may be difficult and the adhesion may be significantly reduced. .

The content of reinforcing fillers and softeners mixed together with the rubber components have a mutual relationship with each other. Softeners that cause deoiling include materials having high stability and high compatibility with rubber for processability, adhesion and sealing properties.

The polybutene-based softener content of 20 to 35% by weight keeps the elasticity and mechanical strength of the material while ensuring the formulation and elongation of the material.

When the content of the softening agent is less than 20% by weight, the softening degree of the rubber component becomes difficult to mix the material and it is difficult to secure the elongation. When the content of the softening agent is greater than 35% by weight, the elasticity of the material may be lowered and the mechanical strength may be lowered. have.

As an example, polybutene has a weight average molecular weight of 1000-2400, and is used in processed distillate aromatic extracted (TDAE), residual aromatic extracted (RAE), mild extracted sorbate (MES), nattanic oil, and paraffin oil, which are widely used as rubber process oils. It includes one more. The weight average molecular weights 1000-2400 of the polybutenes provide blendability with viscosity. When the weight average molecular weight of polybutene is less than 1000, it becomes difficult to mix | blend suitably as viscosity falls, and when it exceeds 2400, a viscosity rises and it becomes difficult to mix | blend suitably.

The softener, ie, the sum of polybutene and process oil, can control the mechanical properties depending on the amount of reinforcing filler, but should be limited to control deoiling. As an example, the total content of the softener is limited as in Equation 1 and Equation 2.

[Equation 1]

Rubber Usage Index (RW) = butyl rubber content + 0.5 * recycled butyl rubber content + 0.3 * liquid rubber content

[Equation 2]

Total content of softener used = 0.7 ~ 1.1 * RW

Of these, polybutene has a relatively high weight average molecular weight, which is advantageous in deoiling and relatively excellent in adhesive performance. All other process oils are compatible with rubber to facilitate dispersion of reinforcing fillers, but the weight average molecular weight is relatively low, resulting in deoiling when used in excess (greater than 60% by weight).

Thus, the double polybutene in the softener is at least 60% by weight. The remaining process oils of the softeners have the property of making the homogeneous mixing of the rubber component and the reinforcing filler easy, so it is limited to 5% by weight of the carbon black content which is the most difficult to disperse within 30% by weight of the total content of butyl rubber and liquid rubber. As such, the process oil may be applied to a case where carbon black is mixed and used as a reinforcing filler.

Also, in the cold region, the weight average molecular weight of polybutene is 1500-2400, and the weight average molecular weight of polybutene is 1000-400 when relatively high in the tropics or where there is a high risk of sinking, and when the remaining process oil is used a lot. May be 1300.

Reinforcing fillers increase the strength of rubber products, improve the flatness of waterproof sheets, improve the processability by lowering the elasticity of rubber, and lower the cost. Almost all rubber products contain reinforcing agents and fillers. However, there are many different types and grades of reinforcing fillers, and these properties are also very different, making it difficult to determine the type and amount of use.

In one embodiment, the determination of the type and grade of the reinforcing filler should satisfy the trade off balance. For the stiffness and cost of rubber, the reinforcing fillers include at least one of carbon black, aluminum hydroxide, calcium carbonate, inorganic fillers and talc.

Carbon black accounts for at least 50% by weight of the total amount of the reinforcing fillers. Carbon black with too much reinforcement deteriorates adhesiveness, so carbon black has a nitrogen adsorption surface area (N ₂ SA; Nitrogen Surface Area) of 50 m ² / g or less and dibutyl phthalate (DBP) of 130 or less. Limited. Among the commonly used carbon blacks, the corresponding grades are N550, N660 and N774.

The total amount of carbon black and guaranteed filler is 0.7 ~ 1.3 times the amount of softener used. If the total amount of the carbon black and the guaranteed filler is more than 1.3 times, the flexibility and adhesiveness is lowered, which can not act as a sealing agent, and if it is less than 0.7 times, the rigidity is lowered and the smoothness and dimensional stability are lowered.

In addition, the amount of softener used may be set to the nitrogen adsorption area and dibutyl phthalate (DBP) value of the carbon black used. When the nitrogen adsorption area and the dibutyl phthalate (DBP) value of carbon black are large, the total amount of carbon black and the guaranteed filler is 1.0 to 1.3 of the amount of softener used.

When the nitrogen adsorption area and dibutyl phthalate (DBP) value are relatively small, the total amount of carbon black and guaranteed filler is 0.9 to 1.0 of the softener usage, and when the nitrogen adsorption area and dibutyl phthalate (DBP) value are intermediate, carbon The total amount of black and guaranteed filler is preferably 0.8 to 1.1 of the amount of softener used.

As such, the content of rubber components, softeners and reinforcing fillers can be controlled within a set range depending on the use environment, i.e., local temperature conditions, seasonal factors, degree of wet exposure, desired stiffness, potential damage to the work area, and the like.

Although rubber products have some degree of properties, their properties are further improved depending on the degree of mixing and compatibility between materials. Therefore, even if the base material can be used to implement the characteristics, in order to improve the characteristics, the following materials can be additionally used. Of course they do not limit the conditions of use of the material.

The adhesive flexible waterproofing agent of one embodiment may further include a homogeneous agent and a tackifier to easily and homogeneously mix each rubber component.

As an example, the homogeneous agent includes an aromatic hydrocarbon and an aritic hydrocarbon, and the carbon content (aromatic hydrocarbon: aritic hydrocarbon) is present in a weight ratio of 30:70 to 70:30. Homogenizers are necessarily used when more than 20% by weight of liquid isofran rubber is used in the rubber component. Homogenizers are used in amounts of 1 to 10% by weight of the sum of the rubber components. When the homogeneous agent is less than 1% by weight, it may inhibit the mixing homogeneity of the rubber component, and when it is more than 10% by weight, the flexibility may be inhibited.

The tackifier includes one of C5, C9 and phenolic, and is used at 1 to 5% by weight of the total content of the rubber component. If the tackifier is less than 1% by weight, the improvement in adhesion may be insignificant, and in the case of more than 5% by weight, the improvement in adhesion may be excessive.

Table 1 discloses the waterproofing agent compositions of Examples 1 to 4 and the conventional waterproof sheet composition of the present invention (unit weight percent).

Conventional
Butyl Rubber Waterproof Sheet Conventional rubber asphalt waterproof sheet Example 1 Example 2 Example 3 Example 4 Butyl Rubber 1 15 15 10 - - Butyl Rubber 2 - - 15 15 Recycled Butyl Rubber 25 21 16 17 AP3 (Water Soluble Rubberized Asphalt) 19 45 5 4 4 3 SBS (Rubber) 10 Liquid rubber (LIR 30) - 10 10 15 Carbon black (N660) 10 20 15 15 15 Mineral Filler 30 25 10 10 10 5 Softener (Polybutene) 10 20 20 20 23 Process oil (TDAE) 5 15 5 5 6 4 Homogenizer 2 2 - - 2 3 Tackifier 9 3 - - 2

In Table 1, butyl rubber 1 has a viscosity of 45, and butyl rubber 2 has a viscosity of 35. Example 1 did not use liquid rubber. The process oil used TDAE.

Table 2 discloses the performance of the waterproofing agent of Examples 1 to 4 of the present invention and the conventional waterproof sheet (using water-soluble rubberized asphalt (AP3) and SBS (Styrene Butadiene Styrene) rubber).

Conventional
Butyl Rubber Waterproof Sheet Conventional rubber asphalt waterproof sheet Example
One Example
2 Example
3 Example
4 The tensile strength
(N / m) 3.5 3.7 4.1 3.9 4.3 3.9 Elongation (%) 290 280 265 320 300 340 Tear resistance (N) 26 28 31 29 32 31 Peel Resistance
(N / m) 1.5 1.7 1.7 1.9 2.4 2.2 Adhesion strength
(N / m) 1.7 1.6 1.8 2.1 2.3 2.3

Examples 1 to 4 in which the content of liquid rubber and water-soluble rubberized asphalt (for example, AP3) use 1 to 5% by weight are 19 to 45 weight of water-soluble rubberized asphalt (AP3) without using liquid rubber. Compared to the conventional waterproof sheet using%, it has excellent properties in tensile strength, tear resistance, peeling resistance and adhesion strength while maintaining the elongation rate similarly. Examples 1 to 4 show better physical properties than the prior art when the content of water-soluble rubberized asphalt (AP3) is 3 to 5% by weight.

Since water-soluble rubberized asphalt (AP3) is a water-soluble product, it should be stored above 0 ° C, avoiding direct sunlight, and stored in a dry, well-ventilated shady place, and there is a risk of freezing. In contrast, the first to fourth embodiments including 1 to 5% by weight of the water-soluble rubberized asphalt (AP3) is easy to store and the risk of freezing is low.

Examples 1 to 4 are excellent in tensile strength of 3.9 ~ 4.3 (N / m) than the tensile strength of 3.5 ~ 3.7 (N / m) of the conventional waterproof sheet. Examples 1 to 4 have a tear strength of 29 to 32 (N), which is superior to the tear strength of the conventional waterproof sheet to 26 to 28 (N).

Examples 1 to 4 have a peel resistance of 1.7 to 2.4 (N / m), which is superior to the peel resistance of 1.5 to 1.7 (N / m) of the conventional waterproof sheet. Examples 1 to 4 have an adhesion strength of 1.8 to 2.3 (N / m), which is superior to that of the conventional waterproof sheet of 1.6 to 1.7 (N / m).

In addition, Examples 2 to 4 is 300 to 340 (%) elongation rate is superior to 280 to 290 (%) elongation rate of the conventional waterproof sheet.

Therefore, embodiments of the present invention improve the progress of solidification caused by deoiling phenomenon in the joining section of the underground structure to maintain the sealing function, peeling phenomenon with the concrete base of the underground structure caused by the oil film phenomenon, and waterproof performance due to peeling phenomenon Loss can be prevented.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims, the description of the invention, and the accompanying drawings. Naturally, it belongs to the range.

Claims (11)

41 to 55% by weight of a rubber component including butyl rubber, regenerated butyl rubber and liquid rubber;
20 to 30% by weight of the carbon black and at least one reinforcing filler selected from calcium carbonate, aluminum hydroxide, inorganic fillers and talc;
Asphalt content of 3 to 4% by weight; And
20 to 35% by weight of softener based on polybutene
Including;
Elongation is 300-340%,
Peel resistance is 1.9 ~ 2.4N / m
Adhesion Strength 2.1 ~ 2.3N / m
Adhesive adhesive type waterproofing agent. The method of claim 1,
When the total content of the rubber component is 100,
The total content of butyl rubber and recycled butyl rubber is 60% by weight or more,
Butyl rubber / recycled butyl rubber content ratio of 0.4 or more
Adhesive flexible waterproofing agent. The method of claim 1,
The butyl rubber
Viscosity is 45 or less,
The liquid rubber is
Liquid isoprene rubber with weight average molecular weight of 20000 to 30000
Adhesive flexible waterproofing agent. The method of claim 3,
In the content of the rubber component
Butyl rubber content is 20-50% by weight,
Recycled butyl rubber content 20-60% by weight, and
10-30% by weight of liquid rubber
Adhesive flexible waterproofing agent. The method of claim 1,
The polybutene is
Weight average molecular weight is 1000-2400,
Among the softeners, polybutene
More than 60% by weight
Adhesive flexible waterproofing agent. The method of claim 5,
The remaining process oil of the softener
5% by weight of the carbon black content of less than 30% by weight of the content of butyl rubber and liquid rubber in the rubber component
Adhesive flexible waterproofing agent. The method of claim 6,
The carbon black is
Occupies 50% by weight or more of the total amount of the reinforcing filler
Adhesive flexible waterproofing agent. The method of claim 7, wherein
The total amount of the carbon black and the reinforcing filler is
0.7 to 1.3 times the total amount of the softener
Adhesive flexible waterproofing agent. The method of claim 1,
1 to 5% by weight homogenizer of the rubber component content, and
1 to 5% by weight of the tackifier of the rubber component content
Adhesive flexible type waterproofing agent further comprising. The method of claim 9,
The homogenizer
Contains aromatic hydrocarbons and ariatic hydrocarbons,
The aromatic hydrocarbon and the aritic hydrocarbon
In the range 30:70 to 70:30,
1 to 10% by weight of the total content of the rubber component
Adhesive adhesive type waterproofing agent. The method of claim 9,
The tackifier
One of C5, C9 and phenolic,
1 to 5% by weight of the total content of the rubber component
Adhesive flexible waterproofing agent.