KR20160126255A

KR20160126255A - Polymer complex waterproof sheet

Info

Publication number: KR20160126255A
Application number: KR1020150057117A
Authority: KR
Inventors: 유병도; 유재창; 오광근
Original assignee: 유병도; 이화공업 주식회사
Priority date: 2015-04-23
Filing date: 2015-04-23
Publication date: 2016-11-02
Also published as: KR101688727B1

Abstract

The present invention relates to a polymer composite waterproof sheet, which comprises a synthetic polymer sheet layer and a high-adhesive butylated asphalt compound layer below the synthetic polymer sheet layer, wherein an upper portion of the synthetic polymer sheet layer Wherein a plurality of polymer composite waterproof sheets are connected to each other so as to overlap with each other at the time of joining, and wherein said straight type is joined to the end of the composite waterproof sheet so as to be horizontal, Provide a waterproof sheet.

Description

Polymer complex waterproof sheet [0002]

The present invention relates to a polymer composite waterproof sheet, and more particularly, to a waterproof sheet layer optimized for tensile and tearing performance, and a polymer composite waterproof sheet laminated with an adhered rubberized asphalt layer having excellent adhesion and waterproofness.

Generally, the synthetic polymer waterproof sheet is classified into EPDM, PVC, TPO sheet and the like.

The EPDM sheet is flexible and has excellent physical properties, but it can be bonded only with an adhesive because it can not be heat-sealed when it is bonded. In addition, the PVC sheet is advantageous in that it is flexible due to the addition of a plasticizer and has excellent curling property. However, there is a problem that the flatness is not stable due to the release of the plasticizer after commercialization, and the flexibility is low at low temperatures. In addition, the TPO sheet is excellent in physical properties, is easy to maintain its waterproof performance for a long time, and is excellent in low-temperature flexibility, so that the TPO sheet is not influenced relatively by changes in seasons. In addition, EVA sheet is advantageous in terms of ease of construction and low-temperature flexibility, but has a problem that the sheet is deformed due to the influence of temperature due to poor heat resistance.

For this reason, it is necessary to develop a synthetic polymer waterproof sheet for an optimal functional waterproof sheet excellent in physical bonding force when producing a waterproof sheet.

On the other hand, the adhered type rubberized asphalt waterproof sheet is generally prepared by mixing a butyl rubber with a plasticizer and a filler. Since the butyl rubber is not heated and melted, it is generally rusted in a solvent, plasticized by softening, Solid asphalt.

As another method, a thermoplastic synthetic rubber is melted in a heated straight asphalt, a plasticizer is added, and then a tackifying resin is mixed and formed into a sheet shape.

In this case, it is difficult to keep the adhesion performance constantly due to the deterioration of the adhesion performance due to the difference in adhesion due to the external surface temperature of the plasticizer and the external temperature, and the adhesive property with the synthetic resin is deteriorated due to the oil interface during adhesion between the dissimilar materials.

Therefore, it is necessary to modify the asphalt so that the adhesion performance with other materials can be maintained while maintaining a constant adhesion performance even under the influence of external temperature.

Further, in the case of a waterproof sheet, in particular, a waterproof sheet which is adhered to a waterproof sheet by self-adhesive bonding causes a problem that the water enters through the joint between the waterproof sheets. Therefore, it has been required to develop a waterproof sheet which can solve this problem.

Korean Patent No. 10-1469641 Korean Patent No. 10-0796019

An object of the present invention is to provide a waterproof sheet excellent in water tightness at the time of bonding with a sheet.

Another object of the present invention is to provide a waterproof sheet which does not require an adhesive, and which is excellent in adhesion.

Another object of the present invention is to provide a waterproof sheet satisfying the test standard required for waterproof performance in the test standard of the KS F-4911 synthetic polymer waterproof sheet and the test standard of the self-assembled rubberized asphalt waterproof sheet of KS F-4934 .

In order to achieve the above object, the present invention provides a polymer composite waterproof sheet comprising a synthetic polymer sheet layer and a high-adhesion butylated asphalt compound layer below the synthetic polymer sheet layer, wherein an upper portion of the synthetic polymer sheet layer is flat- And a plurality of polymer composite waterproof sheets are connected to each other so as to overlap with each other when they are joined to each other so that the straight type is joined to the end of the composite waterproof sheet so as to be horizontal. to provide.

Further, the synthetic polymer sheet layer of the present invention is characterized in that the flat irregularities have a height (L) of 0.2 to 0.5 mm, a width of 1 to 3 mm (D1), and an irregular interval D2 of 1 to 3 mm Thereby providing a composite waterproof sheet.

In addition, the thickness H1 of the synthetic polymer sheet layer of the present invention is 1.3 to 1.5 mm, and the thickness H2 of the highly adhesive butyl asphalt compound layer is 1.5 to 2.0 mm.

Also, the present invention provides a polymer composite waterproof sheet, wherein a release film is adhered to the lower part of the high adhesive butyl asphalt compound layer.

Also, the synthetic polymer sheet layer of the present invention may contain 15 to 25 wt% of EVA resin, 15 to 25 wt% of SBS resin, 15 to 25 wt% of TPO, 15 to 25 wt% of polyethylene (PE) and 5 to 10 wt% of polybutadiene, And 5 to 10% by weight of paraffin process oil.

The high-adhesion butyl asphalt compound layer of the present invention may further contain 12 to 18 wt% of synthetic rubber, 50 to 60 wt% of straight asphalt, 5 to 10 wt% of naphthenic process oil, 2 to 8 wt% of C- Wherein the synthetic rubber comprises 40 to 60% by weight of butyl rubber, 2 to 8% by weight of C-9 based petroleum resin, 15 to 25% by weight of polybutadiene, Wherein the polyolefin-based waterproof sheet is produced by extrusion molding a polyolefin-based waterproofing sheet comprising 12 to 18% by weight of chloroprene rubber and 3 to 7% by weight of silane.

The polymer-based composite waterproof sheet of the present invention is excellent in water tightness at the time of bonding a plurality of sheets due to the uneven shape and excellent in the waterproofing performance between the joints.

Further, the polymer-based composite waterproof sheet of the present invention is excellent in bonding force by bonding a plurality of polymer-based composite waterproof sheets to each other to increase the bonding area with the high-adhesion butyl asphalt composite layer due to the uneven shape.

In addition, the polymer composite waterproof sheet of the present invention satisfies all of the test standards required for waterproof performance in the KS F-4911 synthetic polymer waterproof sheet test standard and the KS F-4934 self-adhesive rubberized asphalt waterproof sheet test standard.

1 is a schematic perspective view of a polymer composite waterproof sheet according to an embodiment of the present invention.
2 is a cross-sectional view of a polymer composite waterproof sheet according to an embodiment of the present invention.
3 is a perspective view of a polymer composite waterproof sheet according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that, in the drawings, the same components or parts have the same reference numerals as much as possible. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

The terms " about ", " substantially ", etc. used to the extent that they are used herein are intended to be taken to mean an approximation of, or approximation to, the numerical values of manufacturing and material tolerances inherent in the meanings mentioned, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

FIG. 1 is a schematic cross-sectional view of a polymer composite waterproof sheet according to an embodiment of the present invention, and FIGS. 2 and 3 are a cross-sectional view and a perspective view of a polymer composite waterproof sheet when bonded.

The present invention relates to a polymer composite waterproof sheet comprising a synthetic polymer sheet layer (110) and a highly adhesive butyl asphalt compound layer (120).

The upper part of the synthetic polymer sheet layer 110 is formed to have a flat irregularity and has a rectangular cross section. When a plurality of polymer composite waterproof sheets are overlapped to each other when they are joined together, So as to be horizontal.

When the polymer composite waterproof sheet is installed, a plurality of polymer composite waterproof sheets are connected to overlap each other at the time of bonding. In the case of the joint, the first polymeric composite waterproof sheet is bonded to the lower portion of the high- The composite polymer sheet layer 110 of the second polymer composite waterproof sheet is bonded. In this case, the composite waterproof sheet and the composite waterproof sheet can be bonded due to the high adhesive property of the high-adhesive butyl asphalt compound layer 120 without the need for an adhesive in this case.

The synthetic resin sheet layer 110 preferably has a height L of 0.2 to 0.5 mm and a width of 1 to 3 mm and a recessed and protruded interval D2 of 1 to 3 mm. Adhesive strength is excellent when it is adhesively fixed to the high-adhesive butyl-asphalt compound layer 120 in the above-mentioned range, and water-tightness is excellent because water does not enter from outside.

The penetration of water through the waterproof sheet frequently occurs between the bonded sheets, and the possibility of penetration of the water by the inclination due to the irregularities on the synthetic polymer sheet layer 110 can be significantly reduced. The polymer-based composite waterproof sheet of the present invention is formed such that the protrusions and the protrusions are horizontally aligned with the ends of the other composite waterproof sheets, so that the water must penetrate upward in a rectangular shape The probability of water penetration was significantly lower.

In addition, when a plurality of polymer composite waterproof sheets are bonded to each other, the bonding area with the high-adhesion butyl asphalt compound layer is increased due to the uneven shape, which is advantageous in that the bonding strength is excellent.

The thickness H1 of the synthetic polymer sheet layer 110 is preferably 1.3 to 1.5 mm and the thickness of the high adhesive butyl asphalt compound layer 120 H2) is preferably 1.5 to 2.0 mm. When the thickness H2 of the high adhesive butyl asphalt compound layer 120 is 1.5 to 2.0 mm, the adhesive strength is excellent when bonded to the irregularities on the upper part of the synthetic polymer sheet layer 110, The watertightness can be improved with the advantage that it is firmly fixed to the inside of the body 120.

The composition of the synthetic polymer sheet layer comprises 15 to 25% by weight of EVA resin, 15 to 25% by weight of SBS resin, 15 to 25% by weight of TPO, 15 to 25% by weight of polyethylene (PE) and 5 to 10% by weight of polybutadiene, And 5 to 10% by weight of a process oil.

EVA resin is used to reduce the rate of change of mechanical properties such as surface hardness and strength due to seasonal changes. It is used in the range of 15 ~ 25 weight %.

The SBS synthetic rubber is intended to improve the impact resistance performance, which is a disadvantage of the resin, by increasing the elastic strength, and it is preferable that the SBS synthetic rubber is contained in an amount of 15 to 25% by weight.

In addition, the TPO serves to prevent the color change of the sheet and to prevent the reduction of the acid resistance and to prolong the life, and it is preferable that the TPO is included in the amount of 15 to 25% by weight.

In addition, polyethylene (PE) has a role of preventing corrosion by fungi or external bacteria, and it is preferable that it contains 15 to 25 wt%.

In addition, polybutadiene can prevent the layer separation phenomenon that may occur due to the different hardness or melting point inherent in each resin, and it is preferable that the polybutadiene contains 5 to 10% by weight, which can secure the bond strength between resins.

In addition, the paraffin process oil preferably contains 5 to 10% by weight in order to secure the fluidity between the respective resin raw materials to improve the resin bonding force.

In mixing and extruding the components of the synthetic polymer sheet layer 110, mixing and extrusion are preferably performed at a temperature of 150 ° C or higher, preferably 150 to 250 ° C, and T-DIE is preferably used.

The high adhesive butyl asphalt compound layer 120 is formed under the synthetic polymer sheet layer 110. The high adhesion butyl asphalt compound layer 120 is composed of 12 to 18% by weight of synthetic rubber, 50 to 90% by weight of straight asphalt, Preferably 5 to 10% by weight of a naphthenic process oil, 2 to 8% by weight of a C-9 based petroleum resin, 5 to 10% by weight of a hard calcium carbonate and 5 to 10% by weight of a heavy calcium carbonate.

The synthetic rubbers were prepared from 40 to 60 wt% of butyl rubber, 2 to 8 wt% of C-9 petroleum resin, 15 to 25 wt% of polybutadiene, 12 to 18 wt% of chloroprene rubber, The synthetic rubber can be produced by extrusion molding in weight%. The extrusion molding is preferably performed using T-DIE, and a synthetic rubber in the form of a chip can be produced through extrusion molding.

The butyl rubber is used as a modifier and siloxane and C-9 type petroleum resin are mixed with the butyl rubber in a form in which the molecular structure of the butyl rubber itself is not bonded to other materials.

Also, the C9-based petroleum resin is added, and the C9-based petroleum resin enhances the adhesiveness to improve the interfacial affinity of the thermoplastic resin and the olefin-based copolymerized rubber. The C9-based petroleum resin preferably contains 2 to 8% by weight.

The polybutadiene, which is a modifier, is necessary for securing the bonding strength, and it is preferable that the polybutadiene is mixed at 15 to 25 wt%.

The chloroprene rubber (CR) can be used to improve dimensional stability and fatigue performance after sheet molding, and it is preferable that the chloroprene rubber contains 12 to 18% by weight of the chloroprene rubber.

Also, silane is added for strength reinforcement and reinforcement of the bonding strength of the butyl rubber, and it is preferable that the silane is contained in an amount of 3 to 7 wt%.

The rubber composition of the present invention is prepared by mixing butyl rubber, C-9 petroleum resin, polybutadiene, chloroprene rubber, and silane, which are synthetic rubber materials, by extrusion molding, (120) can be manufactured.

The high-adhesion butyl asphalt compound layer 120 comprises 12 to 18% by weight of synthetic rubber, 50 to 60% by weight of straight asphalt, 5 to 10% by weight of naphthenic process oil, 2 to 8% by weight of C- 5 to 10% by weight of calcium carbonate and 5 to 10% by weight of heavy calcium carbonate.

The role of the prepared synthetic rubber is to allow it to mix well with straight asphalt. In the present invention, the high-adhesive butyl asphalt compound layer 120 is prepared by mixing the self-made synthetic rubber, but the butyl rubber itself is not compatible with the asphalt and is not mixed. In order to mix the butyl rubber with the asphalt, the plastic deformation must be performed, and plastic deformation is caused through the synthetic rubber produced by itself to mix well with the asphalt.

The straight asphalt serves to improve the adhesion performance when mixing with synthetic rubber.

In addition, the naphthenic process oil serves as a compatibilizer, and the C-9 petroleum resin plays a role of enhancing tackiness in order to improve interfacial affinity.

Further, 5 to 10% by weight of hard calcium carbonate having a specific gravity of 0.4 to 0.5 and 5 to 10% by weight of heavy calcium carbonate can be mixed as a filler for processing stability such as prevention of sheet stagnation.

The high-adhesion butyl asphalt compound layer 120 may be prepared by mixing and extruding synthetic rubber, straight asphalt, naphthenic process oil, C-9 petroleum resin, light calcium carbonate, and heavy calcium carbonate in T-DIE .

The high-adhesive butyl-asphalt compound layer 120 thus prepared satisfies the KS F 4934 test standard, and the adhesion performance and the peel resistance performance are respectively 1.9 N / mm (test standard: 1.5 N / mm) and 1.8 N / mm Standard: 1.5 N / mm) The above test results are shown.

The polymer-based composite waterproof sheet of the present invention can be produced by laminating a high-adhesive butyl-asphalt compound layer 120 on the synthetic polymer sheet layer 110 and the synthetic polymer sheet layer 110.

The polymer-based composite waterproof sheet of the present invention is excellent in water resistance, and has high bonding strength when bonded to other composite waterproof sheets, thus being excellent in bonding strength.

In addition, the composite waterproof sheet of the present invention is excellent in water tightness at the time of joining a plurality of sheets in a straight concavo-convex shape, satisfies the test standard of KS F-4911 synthetic polymer waterproof sheet, The asphalt waterproofing sheet test standard meets all the test standards related to waterproof performance.

The present invention satisfies the excellent test standard in the test standard suitable for the waterproof performance in the KS F-4911 test standard and the KS F-4934 test standard. In other words, the excellent waterproof performance standards of the KS F-4911 and KS F-4934 test standards are shown in Table 1 below.

division According to the present invention KSF 4911 regulation KSF 4934 regulation Remark (reason for application) Tensile strength (N / mm 2) 10 10 3 KS F-4911 Application: Higher glass Elongation (%) 450 450 200 KS F-4911 Application: Higher glass Tear strength (N) 40 40 25 KS F-4911 Application: Higher glass Temperature dependence 60 占 폚 (tensile strength N / mm2) 2 1.5 2 KS F-4934 Application: Higher glass -20 ℃ (elongation percentage%) 200 200 50 KS F-4911 Application: Higher the glass (the synthetic polymer sheet is meaningless at low temperatures) Bending performance -20 ° C Do not measure -20 ° C KS F-4934 Application: Check the quality of asphalt compound (Synthetic polymer sheet is meaningless enough to measure at low temperature) Junction stability performance Water pressure performance Not to pitch Do not measure Not to pitch KS F-4934 Application: To confirm self-adhesive performance without using adhesive
KS F-4911 used adhesive Peel resistance performance (N / mm) 1.5 / self-adhesive 24 / Use adhesive 1.5 / self-adhesive Adhesion performance (N / mm) 1.5 / self-adhesive Do not measure 1.5 / self-adhesive KS F-4934 Application: Self-adhesive sheet attachment

Meanwhile, the polymer composite waterproof sheet of the present invention may be configured such that a release film 130 is adhered to the lower part of the high-adhesion butyl asphalt compound layer 120. This is to prevent foreign matter or the like from adhering to the lower portion of the high-adhesion butyl asphalt compound layer 120 during storage and transportation. The material of the release film 130 is adhered to the lower part of the compound layer, The material is not particularly limited.

Hereinafter, embodiments of the present invention will be described in detail.

Example 1

Synthetic polymer sheet layer formation

25 parts by weight of EVA resin, 20 parts by weight of SBS resin, 20 parts by weight of TPO, 25 parts by weight of polyethylene (PE), 5 parts by weight of polybutadiene and 5 parts by weight of paraffin process oil were mixed and extruded through D- A sheet layer is produced.

At this time, the upper part of the synthetic polymer sheet layer was formed to have a rectangular irregular shape, and the cross-section of the synthetic polymer sheet layer was formed to have a flat irregularity of 0.4 mm in height, 2 mm in width, The thickness (H1) of the synthetic polymer sheet layer was 1.3 mm, and the thickness (H2) of the high-adhesion butyl asphalt compound layer was 1.5 mm.

High Adhesive Butyl Asphalt Compound Layer

For the production of synthetic rubber, 50 wt% of butyl rubber, 10 wt% of C-9 petroleum resin, 20 wt% of polybutadiene, 15 wt% of chloroprene rubber and 5 wt% of silane were extruded through T-DIE To prepare a chip type synthetic rubber.

A high-adhesion butyl asphalt compound layer was prepared by using the synthetic rubber thus prepared. The composition was composed of 12 wt% of synthetic rubber, 55 wt% of straight asphalt, 5 wt% of naphthenic process oil, 8 wt% of C-9 petroleum resin, 10% by weight of calcium carbonate and 10% by weight of heavy calcium carbonate were mixed and extruded through T-DIE to prepare a high-adhesive butyl asphalt compound layer.

Example 2

The procedure of Example 1 was repeated,

A synthetic polymer sheet layer was prepared by mixing 20 wt% of EVA resin, 20 wt% of SBS resin, 20 wt% of TPO, 20 wt% of polyethylene (PE), 10 wt% of polybutadiene and 10 wt% of paraffin process oil,

The high-adhesive butyl asphalt compound was prepared by using 15% by weight of synthetic rubber, 60% by weight of straight asphalt, 5% by weight of naphthenic process oil, 6% by weight of C-9 type petroleum resin, 7% by weight of hard calcium carbonate, Layer.

The thickness of the synthetic polymer sheet layer (H1) was 1.5 mm, and the thickness of the high-adhesive butyl-asphalt compound layer The thickness (H2) was set to 1.8 mm.

Example 3

The procedure of Example 1 was repeated,

A synthetic polymer sheet layer was prepared by mixing 22.5 wt% of EVA resin, 22.5 wt% of SBS resin, 22.5 wt% of TPO, 22.5 wt% of polyethylene (PE), 5 wt% of polybutadiene and 5 wt% of paraffin process oil,

A high-adhesion butyl asphalt compound was prepared from 18% by weight of synthetic rubber, 60% by weight of straight asphalt, 5% by weight of naphthenic process oil, 5% by weight of C-9 type petroleum resin, 6% by weight of hard calcium carbonate, Layer.

The thickness of the synthetic polymer sheet layer (H1) was 1.5 mm, and the thickness of the high-adhesive butyl-asphalt compound layer The thickness (H2) was set to 2.0 mm.

The test results of the synthetic polymer sheet layer prepared in Examples 1 to 3 are shown in Table 2 below.

Test Items Test basis Example 1 Example 2 Example 3 Test Methods Tensile strength (N / mm) 10 14 15 16 KS F-4911 Elongation (%) 450 520 480 500 KS F-4911 Tear strength (N) 40 52 54 52 KS F-4911

As shown in Table 2, it can be confirmed that the synthetic polymer sheet layer of the present invention has better tensile strength, elongation, and tear strength than the KS F-4911 test standard.

The test results of the high-adhesion butyl asphalt composite layer prepared in Examples 1 to 3 are shown in Table 3 below.

Test Items Test basis Example 1 Example 2 Example 3 Test Methods Adhesion performance (N / mm) 1.5 1.9 1.8 1.8 KS F-4934 Peel resistance performance (N / mm) 1.5 1.8 1.8 1.7 KS F-4934 Flexural Resistance Performance Do not peel residue on protective film or sheet at -20 ℃
clear
clear
clear KS F-4934

As shown in Table 3, the high-adhesion butyl asphalt composition layer of the present invention has superior adhesion performance and peel resistance performance than the KS F-4934 test standard, and the flexural resistance performance is also excellent.

The performance of the polymer-based composite waterproof sheet prepared in Examples 1 to 3 is shown in Table 4.

division The performance criteria of the present invention Example 1 Example 2 Example 3 Tensile strength (N / mm 2) 10 14 15 15 Elongation (%) 450 620 580 610 Tear strength (N) 40 72 78 75 Temperature dependence
60 占 폚 (tensile strength N / mm2) 2 2.6 2.8 2.7 -20 ℃ (elongation percentage%) 200 340 320 320 Bending performance -20 ° C clear clear clear Junction stability performance Water pressure performance Not to pitch clear clear clear Peel resistance performance (N / mm) 1.5 / self-adhesive 1.7 1.8 1.7 Adhesion performance (N / mm) 1.5 / self-adhesive 1.8 1.8 1.9

The polymer composite waterproof sheet composed of the high-adhesion butyl asphalt compound layer according to the present invention was tested for the waterproof performance test in the KS F-4911 synthetic polymer waterproof sheet test standard and the KS F-4934 waterproofing rubberized asphalt waterproof sheet test standard All specifications are met.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be clear to those who have knowledge of.

110: Synthetic polymer sheet layer 120: High adhesive butyl asphalt compound layer
130: release film

Claims

In the polymer composite waterproof sheet,
The synthetic polymer sheet layer and
And a high-adhesive butyl-asphalt compound layer below the synthetic polymer sheet layer,
The upper portion of the synthetic polymer sheet layer is formed in a rectangular irregular shape and has a rectangular cross section,
Wherein a plurality of polymer composite waterproof sheets are connected to each other so as to overlap each other at the time of joining, and said straight type is joined so as to be horizontal with the end of the composite waterproof sheet.

The method according to claim 1,
Wherein the protrusions and protrusions of the synthetic polymer sheet layer have a height (L) of 0.2 to 0.5 mm, a width of 1 to 3 mm (D1), and an uneven spacing (D2) of 1 to 3 mm.

The method according to claim 1,
Wherein the thickness H1 of the synthetic polymer sheet layer is 1.3 to 1.5 mm and the thickness H2 of the high adhesion butyl asphalt compound layer is 1.5 to 2.0 mm.

The method according to claim 1,
And a release film is adhered to the lower portion of the high-adhesive butyl asphalt compound layer.

The method according to claim 1,
Wherein the synthetic polymer sheet layer comprises 15 to 25% by weight of EVA resin, 15 to 25% by weight of SBS resin, 15 to 25% by weight of TPO, 15 to 25% by weight of polyethylene (PE) and 5 to 10% by weight of polybutadiene, 5 to 10% by weight based on the total weight of the polymer composite waterproof sheet.

The method according to claim 1,
The high-adhesion butyl asphalt compound layer comprises 12 to 18 wt% of synthetic rubber, 50 to 60 wt% of straight asphalt, 5 to 10 wt% of naphthenic process oil, 2 to 8 wt% of C-9 petroleum resin, To 10% by weight, and heavy calcium carbonate 5 to 10% by weight,
Wherein the synthetic rubber comprises 40 to 60 wt% of butyl rubber, 2 to 8 wt% of C-9 petroleum resin, 15 to 25 wt% of polybutadiene, 12 to 18 wt% of chloroprene rubber, and 3 to 7 wt% Based composite waterproof sheet.