KR101508990B1 - Self adhesive waterproof sheet - Google Patents

Abstract

The present invention relates to a self-adhesive water-proof sheet, comprising a modified asphalt made by mixing 15-20 parts by weight of styrene-butadiene-styrene (SBS), 10-20 parts by weight of process oil, 5-10 parts by weight of fillers with 1-5 parts by weight of adhesive for 50 parts by weight of straight asphalt; and a biaxial oriented film attached on one surface of the modified asphalt.

Description

{SELF ADHESIVE WATERPROOF SHEET}

The present invention relates to a self-adhesive waterproof sheet, and more particularly, it relates to a self-adhesive waterproof sheet, and more particularly, to a self-adhesive waterproof sheet provided with an improved asphalt, which can not only curl a curling phenomenon, Durability and waterproofing properties of the self-supporting type waterproof sheet are improved, so that various defects such as leakage of water generated after the construction can be minimized.

Generally, as the building becomes larger, the shape of the roof is flattened, and the possibility that the rainwater leaking on the roof is leaked to the inside of the building is increasing. In order to prevent the rainwater from penetrating into the roof slab, various waterproofing methods such as asphalt sheet or liquid- And the like are currently most widely used.

That is, a primer which is generally used on the base surface is applied, and after the primer application is completed, a waterproof layer is formed by attaching a general waterproof sheet on the dried primer, or a waterproof layer is formed by applying a general coating film waterproofing material.

When the waterproofing of the waterproof sheet or the coating waterproofing material is completed, a protective mortar layer is laid using a cement mortar mixed with cement and sand for the purpose of protecting the waterproof layer.

The waterproofing method can be completed by placing a protective pressure layer composed of cement, sand, and gravel to prevent lifting of the waterproof and waterproof layer from the base surface.

Here, the waterproof sheet is mainly composed of an asphalt-based sheet, and the coating material waterproofing material is mainly a urethane coating waterproofing material or an inorganic elastic coating film waterproofing material.

However, when the asphalt-based sheet is used in the conventional waterproofing method, it is inconvenient that the asphalt in the solid state in the field is heated and melted to make the viscous semi-solid state and then attached to the base surface. The worker may be exposed to the risk of burns, and thus the cost for construction as a whole, such as an increase in labor costs, will increase.

In addition, when the asphalt of the above-mentioned asphalt-based sheet is weak to heat and the four seasons are clear as in the case of Korea, when the temperature variation between summer and winter is large, the physical properties of the asphalt are destroyed. And problems such as breakage or breakage may occur.

As described above, when the asphalt-based sheet is cracked or damaged due to temperature variation, it is possible to cause lifting due to the increase of the cracks. In addition, due to short-term moisture influences due to various rainfall during summer and long- As a result, since the water penetrates into the lower part of the waterproof layer, the life of the waterproof layer can not be guaranteed for a long period of time.

As a related prior art, there has been proposed a method of manufacturing a waterproofing sheet, which is disclosed in Korean Patent Registration No. 10-0949570 (filed on Mar. 18, 2010) and Patent Application No. 10-1006473 Name: Waterproof sheet, registration date: December 30, 2010).

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a waterproof sheet having improved asphalt that can curl curling phenomenon, And it is an object of the present invention to provide a self-adhesive waterproof sheet which is improved in durability and waterproofness and can minimize various defects such as leakage water generated after the application.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

In order to achieve the above object, the present invention has the following technical features.

15 to 20 parts by weight of styrene-butadiene-styrene (SBS), 10 to 20 parts by weight of a process oil, 5 to 10 parts by weight of a filler, and 1 to 10 parts by weight of a filler, based on 50 parts by weight of straight asphalt. 5 parts by weight of a modified asphalt; And a biaxially stretched film adhered on one side of the modified asphalt.

In the self-adhesive waterproof sheet according to the present invention, the penetration degree of the straight asphalt is 80 to 100.

In the self-adhesive waterproof sheet according to the present invention, the process oil is composed of any one of naphthene, paraffin, and isoparaffin.

In the self-adhesive waterproof sheet according to the present invention, the filler is made of any one of talc, sand, calcium carbonate, carbon black and dolomite.

In the self-adhesive waterproof sheet according to the present invention, the adhesive material is made of petroleum resin or vegetable starch.

In the self-adhesive waterproof sheet according to the present invention, the modified asphalt is further mixed with an adhesive auxiliary material for assisting the adhesive material, wherein the adhesive auxiliary material is made of polyethylene (PE) or thermoplastic polyolefin (TPO).

In the self-adhesive waterproof sheet according to the present invention, the thermoplastic polyolefin (TPO) is 1 to 5 parts by weight.

In the self-adhesive waterproof sheet according to the present invention, the modified asphalt is further mixed with pulp, which is an oil absorber for enhancing the strength of the modified asphalt, and the pulp is composed of 1 to 3 parts by weight.

In the self-adhesive waterproof sheet according to the present invention, the biaxially stretched film is formed by fusing a high density polyethylene (HDPE) film while crossing two layers.

The self-adhesive waterproof sheet according to the present invention comprises 40 to 50 parts by weight of styrene-butadiene-styrene (SBS), 10 to 20 parts by weight of natural rubber (NR), 10 to 20 parts by weight of chloroprene rubber (CR) 20 to 20 parts by weight of butyl rubber, 10 to 20 parts by weight of butyl rubber and 1 to 5 parts by weight of an antioxidant; And a biaxially stretched film adhered on one side of the modified asphalt.

In the self-adhesive waterproof sheet according to the present invention, the modified asphalt is further mixed with the modified asphalt with an asphalt modifier, and the asphalt modifier is comprised of 15 to 20 parts by weight.

In the self-adhesive waterproof sheet according to the present invention, the modified asphalt is further mixed with an inorganic filler and a water-soluble synthetic rubber in the modified asphalt, wherein the water-soluble synthetic rubber is 1 to 5 parts by weight.

In the self-adhesive waterproof sheet according to the present invention, the water-soluble synthetic rubber may be selected from the group consisting of styrene butadiene latex (SB-LATEX), natural rubber latex (NR-LATEX), butadiene rubber latex (BR-LATEX), acrylonitrile butadiene rubber latex NBR-LATEX).

In the self-adhesive waterproof sheet according to the present invention, the modified asphalt is prepared by first mixing the styrene-butadiene-styrene (SBS) and the asphalt modifier, and mixing the natural rubber (NR), the chloroprene rubber The butyl rubber is mixed in a second order.

In the self-adhesive waterproof sheet according to the present invention, the penetration degree of the straight asphalt is 60 to 80 or 80 to 100.

In the self-adhesive waterproof sheet according to the present invention, the modified asphalt further mixes the process oil made of naphthene, paraffin or isoparaffin with the modified asphalt.

In the self-adhesive waterproof sheet according to the present invention, the prolesh oil is 10 to 20 parts by weight.

In the self-adhesive waterproof sheet according to the present invention, the modified asphalt is further mixed with a filler composed of any one of talc, sand, calcium carbonate, carbon black and dolomite in the modified asphalt.

In the self-adhesive waterproof sheet according to the present invention, the filler is 5 to 10 parts by weight.

In the self-adhesive waterproof sheet according to the present invention, the modified asphalt further mixes an adhesive made of petroleum resin or vegetable starch to the modified asphalt.

In the self-adhesive waterproof sheet according to the present invention, the adhesive material is composed of 1 to 5 parts by weight.

In the self-adhesive waterproof sheet according to the present invention, the modified asphalt is further mixed with an adhesive auxiliary material for assisting the adhesive material, wherein the adhesive auxiliary material is made of polyethylene (PE) or thermoplastic polyolefin (TPO).

In the self-adhesive waterproof sheet according to the present invention, the thermoplastic polyolefin (TPO) is 1 to 5 parts by weight.

In the self-adhesive waterproof sheet according to the present invention, the modified asphalt is further mixed with pulp, which is an oil absorber for reinforcing the strength of the modified asphalt, wherein the pulp is composed of 1 to 3 parts by weight.

In the self-adhesive waterproof sheet according to the present invention, the biaxially stretched film is formed by fusing a high density polyethylene (HDPE) film while crossing two layers.

It is an object of the present invention to provide a waterproofing sheet with improved asphalt which is capable of reducing curling phenomenon due to the improvement of the above mentioned problems and also can prevent lifting due to excellent adhesive force, It is possible to minimize various defects such as leakage occurring after the construction.

In addition, it guarantees excellent waterproofness in any climate environment, and can prevent water leakage due to windy weather, roof ventilation, damages of tile and asphalt roofing material, damage of building due to leakage of snow and ice dam.

Other advantages of the present invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a perspective view showing a state in which the waterproof sheet is wound in a rolled shape according to one embodiment of the present invention. Fig.
Fig. 2 is a perspective view showing a state in which the self-supporting type waterproof sheet according to Fig. 1 is applied. Fig.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. It should also be understood that the position or arrangement of individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

FIG. 1 is a perspective view showing a state in which the waterproof sheet is wound in a rolled shape, and FIG. 2 is a perspective view showing a state in which the waterproof sheet of FIG. 1 is applied.

The self-adhesive waterproof sheet 100 according to the present invention includes the modified asphalt 110 and the waterproof protective layer 120, as shown in FIGS.

The self-bonding waterproof sheet 100 of the present invention can be rolled into a roll (roll) shape. Generally, a release sheet is attached to the lower surface of the waterproof sheet in order to wind and circulate the waterproof sheet in a rolled (rolled) shape. When the waterproof sheet is applied, the release paper is separated from the lower surface of the waterproof sheet, and the separated release paper is discarded. At this time, the release paper is usually formed by applying a silicone resin emulsion after surface treatment of one side of kraft paper.

15 to 20 parts by weight of styrene-butadiene-styrene (SBS), 10 to 20 parts by weight of process oil, 5 to 10 parts by weight of a filler and 1 to 5 parts by weight of an adhesive are mixed with 50 parts by weight of straight asphalt .

Straight asphalt penetration is 80-100. Straight asphalt contains a large amount of bitumen that is not decomposed to the last residue when the hard material is removed through the atmospheric pressure or distillation apparatus of crude oil. When the penetration degree is below 40, it is mainly used for industrial use , And those with an intrusion level of more than 40 are used for road pavement and repair structures.

Styrene Butadiene Styrene (SBS) is a thermoplastic rubber that is added to modify straight asphalt. Styrene-butadiene-styrene (SBS), which is a thermoplastic rubber, is largely divided into a linear type and a radial type. Radial type styrene-butadiene-styrene (SBS) It is preferable to use linear type styrene-butadiene-styrene (SBS) which is not suitable for low-temperature melting and is relatively low in molecular weight because the viscosity of the waterproofing material is excessively increased.

Process oil consists of naphthene, paraffin, and isoparaffin. Process oil is a mineral oil that is added to improve the workability in the process of compounding rubber (mixing, extrusion, etc.). Paraffinic, naphthenic, aromatic, etc., which are mainly obtained from high boiling point oil of petroleum, are used.

The filler is made of any one of talc, sand, calcium carbonate, carbon black and dolomite. Particulate mullions are mainly used as fillers.

The adhesive is made of petroleum resin or vegetable starch. The adhesive has a strong initial bonding strength and environment friendliness, and it is not necessary to use a nail or the like to provide convenience in use.

The modified asphalt 110 is further mixed with an adhesion auxiliary material for assisting the adhesive material, and the adhesion aiding material is formed by including at least one of polyethylene (PE) and thermoplastic polyolefin (TPO).

Polyethylene (PE), an adhesive additive, has outstanding characteristics that are widely used in plastics such as "light", "do not rust" and "do not decompose" and have chemical stability, weather resistance, water resistance, low temperature impact resistance, It is also the lightest among the plastics.

The thermoplastic polyolefin (TPO) is composed of 1 to 5 parts by weight. Thermoplastic polyolefins (TPO) are collectively referred to as thermoplastic polyurethanes (TPU), polypropylene (PP), ethylene vinyl acetate (EVA) and other thermoplastic materials that can be melted and molded. Among them, the thermoplastic material excellent in physical properties is thermoplastic polyurethane (TPU).

The modified asphalt (110) is further mixed with pulp, which is an oil absorber for reinforcing the strength of the modified asphalt (110), and the pulp is composed of 1 to 3 parts by weight. The oil absorbing agent prevents moisture, oil, etc. from entering the contents, and includes silica gel, ageless agent and the like.

 The waterproof protective layer 120 is integrally attached to one surface, that is, the upper surface of the modified asphalt 110.

The waterproof protective layer 120 is a biaxially oriented film, and a high density polyethylene (HDPE) film is fused while crossing two layers.

Specifically, a general film has a curling characteristic and a mechanical characteristic which are not constant, so that a tensile strength, an elongation and a tearing performance in a longitudinal direction and a width direction are remarkably different, so that they do not correspond to a structural behavior or a strain on an external environment There are disadvantages. In order to compensate for this, the waterproof protective layer 120 made of the biaxially stretched film of the present invention is manufactured by laminating longitudinal and transverse directions at an intersection so that the ratio of tensile performance (tensile strength, elongation) In the manufacturing process, high density polyethylene (HDPE) film of the same material is fused while crossing two layers to maintain the mechanical characteristics in the longitudinal direction and the width direction constantly to improve curling characteristics and mechanical properties.

In particular, existing films are biased with high density polyethylene (HDPE), ethylene vinyl acetate (EVA), polyvinyl chloride (PVC), ethylene propylene (EPDM), and polyethylene terephthalate On the other hand, the biaxially stretched film is produced by a biaxial stretching process, so that it is excellent in tensile strength, tensile elastic modulus, gas barrier property such as oxygen, heat resistance and cold resistance, and even if a urethane film waterproofing material is applied, a urethane film waterproofing material is applied It is possible to stably protect the butyl rubber layer even after the application and to prevent the waterproof layer from being separated from the butyl rubber layer and the urethane coating material waterproofing material.

The biaxially stretched film was a polymer which was difficult to biaxially stretch due to the hydrogen bonding due to the amide group (-NHCIO-) between molecular chains. However, by the 1960s, biaxially oriented films started to be developed. The non-stretched sheet is stretched in both the longitudinal and transverse directions to stretch the polymer film in the direction of the plane, and the molecules are oriented in a planar biaxial orientation.

The biaxial stretching method includes a simultaneous biaxial stretching method by a tenter method and an inflation method, and a biaxial stretching method by a tenter. The biaxially stretched film has excellent strength, bending fatigue resistance, friction resistance, impact resistance, cold resistance and pinhole resistance required as a surface substrate for packaging, and is widely used for large-scale commercial packaging such as waterproof packaging and vacuum packaging.

The waterproofing protective layer 120 reinforces the strength of the modified asphalt 110 and alleviates the impact.

A waterproofing protective layer 120 made of a biaxially stretched film is attached to the upper surface of the modified asphalt 110. The waterproofing protective layer 120 made of a biaxially stretched film is used to prevent the modified asphalt 110 from being damaged or damaged And it is excellent in integrity with the urethane coating material used in the connection part at the time of waterproofing, so that it is prevented from being separated or lifted at a low temperature or a high temperature.

Hereinafter, another preferred embodiment of the self-adhesive waterproof sheet 100 according to the present invention will be described in detail.

The modified asphalt 110 is prepared by mixing 40 to 50 parts by weight of styrene butadiene styrene (SBS), 10 to 20 parts by weight of natural rubber (NR), 10 to 20 parts by weight of chloroprene rubber 10 to 20 parts by weight of a chloroprene rubber (CR), 10 to 20 parts by weight of a butyl rubber, and 1 to 5 parts by weight of an antioxidant.

The modified asphalt 110 is further mixed with the modified asphalt 110 and the asphalt modifier 15 to 20 parts by weight. The modified asphalt (110) is further mixed with the inorganic filler and the water-soluble synthetic rubber in the modified asphalt (110), and the water-soluble synthetic rubber is 1 to 5 parts by weight. Water-soluble synthetic rubbers include styrene butadiene-LATEX, SB-LATEX, natural rubber latex (NR-LATEX), butadiene rubber (BR-LATEX), acrylonitrile butadiene rubber latex (Acrylonitrile Butadiene Rubber, NBR-LATEX).

The modified asphalt 110 is prepared by first mixing the styrene-butadiene-styrene (SBS) and the asphalt modifier, and then mixing the natural rubber (NR), the chloroprene rubber (CR), and the butyl rubber.

(NR), chloroprene rubber (CR) which can contribute to relatively good adhesion performance can not be secured because the modified asphalt 110, which is a mixture of styrene-butadiene-styrene (SBS) and asphalt modifier, , And butyl rubber are mixed in a second order. This is because there is a difference in the melting method and a separate mixing process is required. For example, the modified asphalt (110) is compatible at a high temperature and can be thermally fused, but the natural rubber (NR), chloroprene rubber (CR) and butyl rubber are not thermally melted and mixed with a mixer or an extruder And is subjected to a heat melting process and a kneading process at the same time.

Straight asphalt has an invasion degree of 60 to 80 or 80 to 100. Straight asphalt contains a large amount of bitumen which is not decomposed to the last residue when the hard material is removed through crude oil at atmospheric pressure or a vacuum distillation apparatus. Straight asphalt is used mainly for industrial use with an intrusion degree of 40 or less and for structures used for pavement or repair with a penetration degree of 40 or more.

Natural Rubber (NR), called latex, is obtained from various plants, which is a colloidal rubber dispersion. Natural rubber (NR) is obtained by biosynthesis and is excellent in low temperature characteristics, resistance to fatigue, tensile strength and the like.

Chloroprene rubber (CR) is a homopolymer of chloroprene (chlorobutaine). Weather resistance, ozone resistance, heat aging resistance, oil resistance, chemical resistance, ovarian resistance and rubber strength.

The butyl rubber is an inert waterproofing material having a long chain-like structure obtained by copolymerizing a small amount (for example, 1.5-5%) of isoprene with isobutylene.

As synthetic rubber, butyl rubber has a low permeability to gas and moisture, and therefore has suitable performance as a waterproof material. Compared to natural rubber or styrene-butadiene rubber, the butyl rubber has an air permeability of 7-8 times or more and a water permeability of 10 times or more. Butyl rubber has a linear molecular structure, few double bonds, less polarity than other rubber, low water, oxygen and affinity, low solubility, and slow diffusion rate in these molecules. Therefore, butyl rubber has superior air permeability compared to other rubber.

Also, the content of isoprene having a double bond in the butyl rubber is about 2% in commercial products, which is lower than other rubber (usually several tens% or more). Therefore, butyl rubber has aging characteristics due to strong attack from oxygen or ozone, and it has resistance to dilute natural acid and alkali and has refractory chemical property.

The modified asphalt 110 further mixes process oil made of naphthene, paraffin or isoparaffin into the asphalt. Process oil is a mineral oil that is added to improve the workability in the compounding rubber working process (mixing, extrusion, etc.). Paraffinic, naphthenic, aromatic, etc., which are mainly obtained from high boiling point oil of petroleum, are used. The procelse oil is 10 to 20 parts by weight.

The modified asphalt (110) further mixes the filler composed of any one of talc, sand, calcium carbonate, carbon black and dolomite in the modified asphalt. The filler is made of any one of talc, sand, calcium carbonate, carbon black and dolomite, and particulate mullil is mainly used. The filler is 5 to 10 parts by weight.

The modified asphalt (110) further mixes the modified asphalt (110) with an adhesive made of petroleum resin or vegetable starch. The adhesive has a strong initial bonding strength and environment friendliness, and it is not necessary to use a nail or the like, and convenience of use is provided, and it is made 1 to 5 parts by weight.

The modified asphalt 110 is further mixed with an adhesion auxiliary material for assisting the adhesive material, and the adhesion aiding material is formed by including at least one of polyethylene (PE) and thermoplastic polyolefin (TPO).

Polyethylene (PE), an adhesive additive, has outstanding characteristics that are widely used in plastics such as "light", "do not rust" and "do not decompose" and have chemical stability, weather resistance, water resistance, low temperature impact resistance, It is also the lightest among the plastics.

The thermoplastic polyolefin (TPO) is composed of 1 to 5 parts by weight. Thermoplastic polyolefins (TPO) are collectively referred to as thermoplastic polyurethanes (TPU), polypropylene (PP), ethylene vinyl acetate (EVA) and other thermoplastic materials that can be melted and molded. Among them, the thermoplastic material excellent in physical properties is thermoplastic polyurethane (TPU).

The modified asphalt (110) is further mixed with pulp, which is an oil absorber for reinforcing the strength of the modified asphalt (110), and the pulp is composed of 1 to 3 parts by weight. The oil absorbing agent prevents moisture, oil, etc. from entering the contents, and includes silica gel, ageless agent and the like.

The waterproof protective layer 120 is integrally attached to the modified asphalt 110 on one surface, that is, on the upper surface.

The waterproof protective layer 120 is a biaxially oriented flame, and a high density polyethylene (HDPE) film is fused while crossing two layers.

Specifically, a general film has a curling property and a mechanical property which are not constant, so that a tensile strength, an elongation and a tearing performance in a longitudinal direction and a width direction are remarkably different, so that they do not correspond to a structural behavior or a strain on an external environment There are disadvantages. In order to compensate for this, the waterproof protective layer 120 made of the biaxially stretched film of the present invention is manufactured by laminating longitudinal and transverse directions at an intersection so that the ratio of tensile performance (tensile strength, elongation) In the manufacturing process, high density polyethylene (HDPE) film of the same material is fused while crossing two layers to maintain the mechanical characteristics in the longitudinal direction and the width direction constantly to improve curling characteristics and mechanical properties.

A waterproofing protective layer 120 made of a biaxially stretched film is attached to the upper surface of the modified asphalt 110. The waterproofing protective layer 120 made of a biaxially stretched film is used to prevent the modified asphalt 110 from being damaged or damaged And it is excellent in integrity with the urethane coating material used in the connection part at the time of waterproofing, so that it is prevented from being separated or lifted at a low temperature or a high temperature.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And such variations and modifications are intended to fall within the scope of the appended claims.

100: self-adhesive waterproof sheet 110: modified asphalt
120: Waterproof protective layer

Claims (27)

Modified asphalt prepared by mixing 15 to 20 parts by weight of styrene-butadiene-styrene (SBS), 10 to 20 parts by weight of process oil, 5 to 10 parts by weight of filler and 1 to 5 parts by weight of an adhesive based on 50 parts by weight of straight asphalt; And
And a waterproofing protective layer adhered to one surface of the modified asphalt,
Wherein the waterproof protective layer comprises a biaxially stretched film,
Wherein the waterproofing protective layer is formed by fusing two or more high density polyethylene (HDPE) films while crossing each other.
The method according to claim 1,
Wherein the straight asphalt has an intrusion degree of 80 to 100. The waterproof sheet of claim 1,
The method according to claim 1,
Wherein the process oil is made of one of naphthene, paraffin, and isoparaffin.
The method according to claim 1,
Wherein the filler comprises one of talc, sand, calcium carbonate, carbon black, and dolomite.
The method according to claim 1,
Wherein the adhesive material is made of petroleum resin or vegetable starch.
The method according to claim 1,
Wherein the modified asphalt is further mixed with an adhesive auxiliary material for assisting the adhesive material, wherein the adhesive auxiliary material is formed of at least one of polyethylene (PE) and thermoplastic polyolefin (TPO).
The method according to claim 6,
Wherein the thermoplastic polyolefin (TPO) comprises 1 to 5 parts by weight of the thermoplastic polyolefin (TPO).
The method according to claim 1,
Wherein the modified asphalt is further mixed with pulp, which is an oil absorber for reinforcing the strength of the modified asphalt, and the pulp is 1 to 3 parts by weight.
delete delete 40 to 50 parts by weight of styrene-butadiene-styrene (SBS), 10 to 20 parts by weight of natural rubber (NR), 10 to 20 parts by weight of chloroprene rubber (CR), 10 to 20 parts by weight of butyl rubber Modified asphalt mixed with 1 to 5 parts by weight of an antioxidant; And
And a waterproofing protective layer adhered to one surface of the modified asphalt,
Wherein the waterproof protective layer comprises a biaxially stretched film,
Wherein the waterproofing protective layer is formed by fusing two or more high density polyethylene (HDPE) films while crossing each other.
12. The method of claim 11,
Wherein the modified asphalt is further mixed with the asphalt modifier to the modified asphalt, and the asphalt modifier comprises 15 to 20 parts by weight.
12. The method of claim 11,
Wherein the modified asphalt further comprises an inorganic filler and a water-soluble synthetic rubber mixed with the modified asphalt, wherein the water-soluble synthetic rubber comprises 1 to 5 parts by weight.
14. The method of claim 13,
The water-soluble synthetic rubber includes at least one of styrene butadiene latex (SB-LATEX), natural rubber latex (NR-LATEX), butadiene rubber latex (BR-LATEX), acrylonitrile butadiene rubber latex (NBR-LATEX) Wherein the water-repellent sheet is a water-repellent sheet.
12. The method of claim 11,
Wherein the modified asphalt is prepared by first mixing the styrene-butadiene-styrene (SBS) and the asphalt modifier, and then mixing the natural rubber (NR), the chloroprene rubber (CR) Folding and waterproof sheet.
12. The method of claim 11,
Wherein the straight asphalt has an intrusion degree of 60 to 80 or 80 to 100. The self-
12. The method of claim 11,
Wherein the modified asphalt is further mixed with a process oil composed of any one of naphthene, paraffin and isoparaffin in the modified asphalt.
18. The method of claim 17,
Wherein the process oil is 10 to 20 parts by weight.
12. The method of claim 11,
Wherein the modified asphalt is further mixed with a filler composed of any one of talc, sand, calcium carbonate, carbon black and dolomite in the modified asphalt.
20. The method of claim 19,
Wherein the filler is 5 to 10 parts by weight.
12. The method of claim 11,
Wherein the modified asphalt is further mixed with an adhesive material comprising petroleum resin or vegetable starch to the modified asphalt.
22. The method of claim 21,
Wherein the adhesive material comprises 1 to 5 parts by weight of the self-adhesive waterproof sheet.
22. The method of claim 21,
Wherein the modified asphalt is further mixed with an adhesive auxiliary material for assisting the adhesive material, wherein the adhesive auxiliary material is formed of at least one of polyethylene (PE) and thermoplastic polyolefin (TPO).
24. The method of claim 23,
Wherein the thermoplastic polyolefin (TPO) comprises 1 to 5 parts by weight of the thermoplastic polyolefin (TPO).
12. The method of claim 11,
Wherein the modified asphalt is further mixed with pulp, which is an oil absorber for reinforcing the strength of the modified asphalt, wherein the pulp is composed of 1 to 3 parts by weight.
delete delete

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