KR101831673B1 - Rubberized Asphalt Self-adhesive Waterproofing Sheet - Google Patents

Abstract

The present invention relates to a rubberized self-adhesive asphalt waterproof sheet and, specifically, to the rubberized self-adhesive asphalt waterproof sheet, reinforcing product competitiveness by lowering manufacturing costs and sheet forming costs to obtain physical properties of KS F 4935 and satisfy the KS F 4934. To achieve the purpose of the present invention, the rubberized self-adhesive asphalt waterproof sheet includes: a sheet member; and a self-adhesive member formed on the sheet member at fixed thickness. The rubberized self-adhesive asphalt waterproof sheet is applied with regulation of the KS F 4934. The self-adhesive member comprises: 55-75 parts by weight of straight asphalt; 6.5-12.5 parts by weight of styrene-butadiene-styrene (SBS) block copolymer, which is a rubber modifier; 6-9 parts by weight of a plasticizer; 4-7 parts by weight of an adhesive agent; 6.5-12.5 parts by weight of a filler; and 2-4 parts by weight of degeneration modifier.

Description

{Rubberized Asphalt Self-adhesive Waterproofing Sheet}

The present invention relates to an adhered type rubberized asphalt waterproofing sheet, and more particularly, to a waterproofing sheet of a rubberized asphalt waterproofing sheet, which is capable of obtaining physical properties of KS F 4935 and enhancing product competitiveness by lowering the sheet- To an adhered type rubberized asphalt waterproof sheet.

In general, concrete structures such as a roof slab, a roof, a building basement, or various fluid storage tanks are weak in water resistance, so that rainwater or ground water can permeate, thereby deteriorating the bonding force of the concrete itself. The cracks are generated in the concrete structure by the volume change of the concrete structure, and the life of the building can be shortened.

Also, it is very important to prevent the penetration of rainwater or groundwater in the concrete structure because the function of the building is lost when rainwater or groundwater is infiltrated or leaked through the crack of the concrete structure.

The waterproofing method of the concrete structure can be classified into the permeable waterproofing method and the coating waterproofing method. The permeable waterproofing method is a method of applying the waterproofing agent to the concrete surface to densely change the concrete itself to enhance the waterproofing property. Is a method of improving the waterproof property by coping with cracks of concrete structures or construction defects of buildings by forming multiple impermeable waterproof layers inside and outside of concrete structures.

The coating waterproofing method is divided into asphalt waterproofing, sheet waterproofing and film waterproofing according to the type of material forming the impermeable film and the construction method. In order to increase the waterproof effect, a composite waterproofing method .

The sheet waterproofing includes asphalt roofing, an improved asphalt waterproof sheet, a synthetic polymer waterproof sheet, an adhered rubberized asphalt waterproof sheet, and an adhesive flexible waterproof sheet.

The modified asphalt waterproof sheet is prepared by dissolving a styrene-butadiene-styrene (SBS) polymer in a high temperature asphalt of 180 ° C or higher and then mixing various additives to improve properties such as excellent heat resistance, chemical resistance, cold resistance, And is a waterproof sheet which is formed into a predetermined thickness by using a central base material such as a nonwoven fabric.

The modified asphalt waterproof sheet is advantageous in heat resistance, chemical resistance, cold resistance and bonding property. However, in order to form the sheet in the form of a sheet, a modified asphalt layer of a certain thickness is formed on the upper and lower portions, When a coating material waterproofing material containing an organic solvent is applied in a complex manner, it is a cause of sheet deformation and dissolution of the modified asphalt layer, thereby damaging the waterproofing layer.

In order to solve these problems, some improvement measures have been suggested. However, there are limitations in countermeasures against changes in the surrounding environment, and it is insufficient to cope with the longevity improvement of the waterproofing material, and development thereof is urgently required.

As a result, the asphalt layer is minimized, and the asphalt waterproof sheet which is not influenced by the coating waterproofing material and can preserve the advantages of the existing waterproof sheet is required.

In order to solve the above-mentioned problems, the composite waterproofing modified asphalt felt sheet of the present applicant's Prior Art No. 10-1681001 has a glass fiber center core layer and a glass fiber core middle layer, Modified asphalt is impregnated with a modified asphalt raw material composed of a single-fiber nonwoven fabric. In the modified asphalt, 5 to 20 parts by weight of a synthetic rubber of SBS, SIS, SERS and SBR and 1 to 5 parts by weight of an asphalt middle- Wherein the asphalt felt is impregnated with a modified asphalt raw material and then degreased. The process for producing the felt sheet is performed at 140 to 170 ° C. to suppress the generation of gas and fumes of the asphalt will be.

The modified asphalt felt sheet of the present applicant has excellent properties such as ozone resistance, acid-fastening resistance, heat resistance and weather resistance by impregnating the sheet with modified asphalt.

However, the applicant's line-registered patent-modified asphalt felt sheet has a disadvantage in that inconvenience of work to be attached after dissolving the felt sheet with a heat source means such as a torch or the like and risk of occurrence of fire during heating by heat source means are inherent .

On the other hand, the conventional pressure-sensitive adhesive waterproof sheet is advantageous in workability and safety as compared with the conventional modified asphalt felt sheet as it is applied by autoclaving. However, when the modified asphalt is softened by oil, The oil can infiltrate on the surface and generate an oil interface, and it can not cope with the thermal deformation of the upper film, causing a curling phenomenon on the upper film surface, which may cause separation of the film, When the hardness is improved, there is a problem that adhesion performance may be lowered at the wet surface or at low temperature.

Meanwhile, KS F 4934 'Adhesion type rubberized asphalt waterproof sheet' of Korea Standard KS F 4934 is a waterproof sheet made of rubberized asphalt waterproof sheet which is adhered directly to the surface of concrete etc. without using heating tools and adhesives .

In addition, Korea Standard KS F 4935 'Injection type sealant for repairing adhesive waterproof rubber asphalt system leakage' is used for repairing cracks and joint joints in roofs, outer walls and floors of concrete underground structures and buildings, Of the present invention is applied to an injection-type sealing material for water-repellent rubber-asphalt-type leak-repellent repair, which is injected into the interface or cracks in the interface or cracks in the joint to reform the waterproof layer.

KS F 4934 and KS F 4935 as a relative comparison table KS F 4934 KS F 4935 flexibility Low Great primer need Unnecessary Sustainability in winter none possible Adhesive strength Great Low Elongation rate Low Great

As shown in Table 1, the waterproofing sheet specified in KS F 4934 is underestimated in terms of flexibility, workability (primer application), re-coatability and elongation (related to the behavior) as compared with KS F 4935 sealant , KS F 4935 compared to the manufacturing unit price and sheet method is easy to install on the desktop is advantageous.

In addition, the sealing material of KS F 4935 is superior to KS F 4934 in physical properties and the like, but has a high manufacturing cost and is too flexible, thereby causing a problem in connection.

Korean Patent Publication No. 10-1613305 (Announced 2015.05.02) Korean Patent Publication No. 10-1682679 (issued on December 5, 2016)

It is an object of the present invention to solve the above-mentioned problems and it is an object of the present invention to provide a KS F 4934 which can obtain the physical properties of KS F 4935, It is to provide a waterproofing sheet of thermoplastic rubberized asphalt.

In order to attain the above object, the present invention provides a self-adhesive, rubberized asphalt waterproof sheet, which is provided with a sheet member and a self-adhesive member having a predetermined thickness on the sheet member, and which is specified in KS F 4934, 55 to 75 parts by weight of straight asphalt; 6.5 to 12.5 parts by weight of SBS (Styrene-Butadiene-Styrene Block Copolymer), which is a rubber-based modifier; 6 to 9 parts by weight of a plasticizer; 4 to 7 parts by weight of a tackifier; 6.5 to 12.5 parts by weight of a filler; And 2 to 4 parts by weight of a modifying modifier.

In the present invention, the SBS is preferably composed of KTR 101, KTR 201, and KTR 401 in a weight ratio of 1: 1: 1 so as to improve the adhesive strength.

In the present invention, the modifying modifier is preferably a chloroprene rubber (CR) to improve flexibility and adhesion.

According to the present invention, it is possible to obtain the physical properties of KS F 4935, and to reduce the sheet cost and manufacturing cost so as to satisfy KS F 4934, thereby enhancing the product competitiveness.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The adhered type rubberized asphalt waterproof sheet of the present invention comprises a sheet member and a seal member which is applied to the sheet member to a predetermined thickness, and is adapted to the KS F 4934 specification.

The sheet member may be made of any material that can be formed into a sheet. For example, PE or HDPE film or modified asphalt sheet.

The adhesion member is applied to the sheet member to a predetermined thickness to form a waterproof layer on the basis of the adhesion performance.

In this case, the above-mentioned adhesive member is formed so as to obtain the physical performance together with the adhesion property of the sealing material of 'KS F 4935'.

The composition of the adhesive member is composed of 55 to 75 parts by weight of straight asphalt, 6.5 to 12.5 parts by weight of a rubber-based modifying material, SBS (Styrene-Butadiene-Styrene Block Copolymer), 6 to 9 parts by weight of a plasticizer, By weight of a tackifier, 6.5 to 12.5 parts by weight of a filler and 2 to 4 parts by weight of a modifier.

The straight asphalt is the final residue obtained by distillation of the crude oil in the atmospheric distillation column and subsequent distillation under reduced pressure of an atmospheric transfer agent (AR), which contains a large amount of bituminous bitumen which is not decomposed. These straight asphalt are classified as AP-3 and AP-5.

Comparison chart of AP-3 and AP-5 Experiment and inspection items AP-3 AP-5 Penetration degree, 25 캜, 100 g, 5 sec: 0.1 mm 80-100 60 to 80 Density (15 ℃) g / ㎤ 1.000 or more 1.000 or more Flash point, COC: ℃ 260 or more 260 or more Softening point: ℃ 42.0 to 50.0 44.0 to 52.0 Shindo (15 ℃): ㎝ 100 or more Toluene soluble content:% by weight 99.9 or more After thin film heating
Mass change rate:% by weight
Intrusion ratio (compared to the original penetration):% 0.6 or less
Over 50 0.6 or less
55 or more Diffusion ratio after evaporation:% Less than 110 Less than 110

As described above, AP-5 and AP-5 are preferable as the straight asphalt formed in the adhesive member of the present invention.

The SBS (Styrene-Butadiene-Styrene Block Copolymer) is a modifier.

In this case, the SBS is prepared by mixing KTR 101, KTR 201, and KTR 401 at a weight ratio of 1: 1: 1.

Comparison table of KTR 101 with KTR 201 and KTR 401 Item KTR-101 KTR-201 KTR-401 rescue linear linear linear shape porous pellet
powder porous pellet porous pellet
powder Content of styrene (wt%) 31.5 31.5 31 Volatile content (wt%) 0.7 0.7 0.7 Ash content (wt%) 0.08 0.08 0.4 Solution viscosity, 25 wt% toluene 4,500 1,200 - Tensile strength (kgf / cm2) 200 200 180 Elongation (%) 800 800 680 Tensile stress kgf / ㎠
(300% moddulus) 26 40 31 Hardness (shore-A / 5 sec) 77 71 82 Melt Index
(g / 10min, 200 DEG C x 5 kg) One 6 One Specific gravity (g / cm3) 0.94 0.94 0.94

Further, the SBS has an effect of increasing the adhesive strength by mixing KTR-101, 201 and 401. The conventional adhesive-type rubberized asphalt waterproof sheet has a problem that the adhesive strength of the waterproof sheet is lowered by using only KTR-101.

If the SBS is less than 6.5 parts by weight, the reforming function can not be performed. If the SBS is more than 12.5 parts by weight, the SBS content affects the composition of the other composition, which hinders smooth function and raises the manufacturing cost.

The plasticizer functions to improve properties of a substance such as hardness and viscosity, depending on the application. In this case, naphthenic process oil is preferably used.

That is, conventional plasticizers show lowering of plasticity and viscosity, rather than naphthene, as paraffinic process oil is used. By using naphthenic process oil, plasticity and viscosity can be increased.

If the amount of the plasticizer is less than 6 parts by weight, smooth plasticity and viscosity can not be obtained. If the plasticizer is more than 9 parts by weight, the performance of the plasticizer may be maintained.

The tackifier increases the tackiness of the surface and maintains the tackiness for a long time, and is composed of 4 to 7 parts by weight.

Here, the tackifier is made of a petroleum resin, and the petroleum resin is preferably C-9.

If the amount of the tackifier is less than 4 parts by weight, smooth adhesion and long-time tackiness can not be maintained. If the tackifier is more than 7 parts by weight, tackiness is maintained, but manufacturing cost increases due to addition of materials.

The filler is preferably composed of 6.5 to 12.5 parts by weight of calcium carbonate.

The calcium carbonate is mixed with heavy calcium carbonate (heavy carbon) and light calcium carbonate (dazzle) at a weight ratio of 1: 0.5 to 1, thereby lowering the specific gravity and controlling the flow-down phenomenon.

That is, in the prior art, the filling agent is composed only of scorching, so that the flow-down phenomenon can not be controlled and the manufacturing and the workability are somewhat lowered.

In this case, when the filler is less than 6.5 parts by weight, the filling function is not smoothly performed and the downflow phenomenon occurs. When the filler is more than 12.5 parts by weight, the manufacturing cost is increased due to the addition of the material.

The modified modifier performs a function of improving flexibility and adhesion, and here, chloroprene rubber (CR, Polychloroprene Rubber) is used.

If the modified modifier is less than 2 parts by weight, the reforming function can not be performed smoothly. If the modifying modifier is more than 4 parts by weight, the manufacturing cost is increased due to the addition of materials.

The adhered type rubberized asphalt waterproof sheet comprising the above-mentioned adhesion member and the above-mentioned 'KS F 4934' adhered type rubberized asphalt waterproof sheet 'and KS F 4935' adhesion flexible rubber asphalt water leakage repairing injection Type sealing material 'as follows.

As described above, it can be confirmed that the adhesion performance is improved in the adhered type rubberized asphalt waterproof sheet of the present invention compared to the existing KS F 4934 and KS F 4935, and it can be seen that construction on the wet surface is also possible.

As a result, the composition of the thus-formed adhesive member has the physical properties of KS F 4934 and the physical properties of KS F 4935. In particular, the adhered type rubberized asphalt waterproof sheet enhances the flexibility and tackiness, the low temperature adhesion performance, the wet side adhesion performance and the adhesion performance, thereby enhancing the product competitiveness to improve the workability and limit the product usage.

The above description is only one example for implementing the adhered type rubberized asphalt waterproof sheet, and the present invention is not limited to the above-described embodiment. It will be understood by those skilled in the art that various changes may be made without departing from the spirit of the invention.

Claims (3)

1. A self-sealing type rubberized asphalt waterproof sheet, which is applied to the specification of KS F 4934, including a sheet member and a self-adhesive member made of a certain thickness on the sheet member,
The adhesive member comprises 55 to 75 parts by weight of straight asphalt;
6.5 to 12.5 parts by weight of SBS (Styrene-Butadiene-Styrene Block Copolymer), which is a rubber-based modifier;
6 to 9 parts by weight of a plasticizer;
4 to 7 parts by weight of a tackifier;
6.5 to 12.5 parts by weight of a filler; And
2 to 4 parts by weight of a modifying modifier;
The SBS was prepared by mixing KTR 101, KTR 201, and KTR 401 in a weight ratio of 1: 1: 1,
Wherein the waterproof sheet is formed of a thermoplastic resin.
delete [3] The method according to claim 1,
Polychloroprene rubber (CR) to improve flexibility and adhesion;
Wherein the waterproof sheet is a self-adhesive type rubberized asphalt waterproof sheet.