KR102351191B1 - Environmentally friendly self-adhesive asphalt coated polyolefin hollow composite waterproof sheet and waterproof construction method using the sam - Google Patents

Abstract

The present invention relates to an eco-friendly, polyolefin-based, hollow, self-adhesive, composite waterproofing sheet coated with asphalt. More specifically, the present invention relates to a waterproof sheet made by coating glass fiber and asphalt on the surface of a polyolefin-based resin film, and then perforating a plurality of holes in the sheet, and to a waterproofing method using the same.

Description

Environmentally friendly self-adhesive asphalt coated polyolefin hollow composite waterproof sheet and waterproof construction method using the sam

The present invention relates to a hollow type self-adhesive composite waterproofing sheet coated with environmentally friendly asphalt, and more particularly, waterproofing a structure using a self-adhesive composite waterproofing sheet coated with easy-to-construct asphalt and having a number of holes formed therein It relates to a construction method to significantly improve the rust prevention performance.

Conventional waterproofing methods generally used include the asphalt waterproofing method with the longest history, the liquid waterproofing method applied to the base surface of concrete structures, the coating film waterproofing method using urethane and acrylic rubber manufactured for waterproofing, and asphalt as the main raw material. A waterproofing method using asphalt sheets and synthetic polymer sheets made from synthetic resins are known. Efforts are being made to improve the quality of materials and construction for

The above waterproofing methods have advantages and disadvantages according to each construction method, and the asphalt waterproofing method has inconveniences (fire, burns, etc.) in construction due to the work of melting asphalt on the roof of a building, etc. It is suitable for a short case, but in large structures and long spans, if a crack occurs in the structure, the waterproofing layer is also damaged.

Urethane coating waterproofing, which is the most widely used among coating waterproofing methods, has elasticity against minor cracks, so it is possible to expose waterproofing, so it is easy to repair. However, the urethane waterproofing method can cause swelling, lifting, peeling, etc., depending on the wet condition, insufficient primer application, poor latitude of concrete, and poor base surface treatment (poor cleaning, damage, poor drying), etc. There is a problem that the lifespan for waterproofing is shortened because of the leakage phenomenon.

Conventional asphalt sheet waterproofing can obtain the required film thickness, can be constructed on complex shapes or steep slopes, has relatively excellent water resistance and weather resistance, and is less sensitive to surface treatment, It is less affected by expansion and water vapor pressure, and it is known that uniform quality can be secured.

As a prior art related to the waterproofing method, domestic patents No. 10-0238994 and No. 10-0334602 show that the joint between sheets, which is the most problematic in the asphalt sheet waterproofing method, is connected to an “I” type integrated joint structure using polyurethane. Although a composite waterproofing method using polyurethane and an improved asphalt sheet to be treated is disclosed, physical adhesion with the non-woven fabric may cause lifting or cracking of the joint part due to the difference in thermal expansion coefficient according to temperature change.

Domestic Patent No. 10-09211676 discloses a composite waterproofing sheet structure and composite sheet waterproofing method using a rubberized asphalt sheet coated with a solvent-free urethane waterproofing agent. Due to the difference in coefficients, the lifting phenomenon of the joint part occurs, and for this reason, the asphalt elution phenomenon at high temperature occurs, which adversely affects the durability.

In addition, the waterproof or composite waterproofing method using a synthetic resin sheet as a waterproofing method using a waterproofing sheet has superior tensile strength, elongation, and tearing strength compared to coating film waterproofing. However, in the waterproofing method using the above-mentioned synthetic resin sheet, the connecting parts between the two sheets are joined by methods such as adhesive, heat welding, or solvent welding, and the bonding method by adhesive or solvent welding can provide instantaneous adhesion. However, due to the high possibility of air entering the edges during the process, the sheet lifting phenomenon may occur. As a result, there is a problem that detachment or lifting occurs at the joint of the waterproof sheet, and the thermal fusion bonding method is limited by the ambient temperature and the working speed is not fast. The downside is that it requires work.

An object of the present invention is to provide a polyolefin-based hollow self-adhesive composite waterproofing sheet coated with asphalt and a waterproofing method using the same, and more specifically, to prevent the formation of floating or clinging due to air bubbles occurring after waterproofing construction Not only that, but also to prevent wrinkles from forming on the sheet.

The present invention is a further improvement of Korean Patent No. 10-1184220 developed by the present inventor in order to improve the problems of the prior art, and the asphalt-coated polyolefin-based composite waterproofing sheet according to the present invention is based on 100 parts by weight of polypropylene. A glass fiber layer is applied to the surface of a polyolefin film prepared by extruding a resin mixture comprising 50 to 70 parts by weight of an olefin-based elastomer, 30 to 50 parts by weight of a functional additive, 10 to 20 parts by weight of a filler, and 10 to 20% by weight of an additive. Formed and coated with asphalt again, then punctured the sheet with a perforator to form a number of hollows, thereby preventing the formation of wrinkles (parts phenomenon due to bubble generation) and wrinkles on the sheet that may occur after waterproofing. have.

The polyolefin-based hollow self-adhesive composite waterproofing sheet coated with asphalt according to the present invention and the waterproofing construction method using the same can prevent the occurrence of chafing due to air bubbles occurring after waterproofing, as well as the phenomenon that the sheet is wrinkled or twisted. can prevent

Hereinafter, the present invention will be described in detail through examples.

The polyolefin used in the self-adhesive composite sheet coated with asphalt according to the present invention is selected from ethylene/propylene copolymer rubber (EPR) or ethylene/propylene/diene copolymer rubber (EPDM rubber).

The functional additive used in the present invention is a polymer component that is formulated to improve adhesion between the composite sheet and the liquid waterproofing material. As a specific component, a polyamide resin prepared by polycondensation of dimer acid and ethylene diamine. Commercially available products (UNI-REZ@110, Versamid 7series) or maleic anhydride (Maleic AnHydride, molecular weight 98.06g/mol) are grafted onto ethylene/propylene/diene copolymer rubber (EPDM rubber) (graft rate is 0.5% to 2.5%). %,) and a commercially available product (Macro DM, MWC-507G).

In addition, the filler used in the present invention is generally selected as a filler widely used in the field of resin molding, and calcium carbonate (CaCO ₃ ) is preferable, and the additive is an antioxidant, which is also a processing aid widely used in the field of resin molding in general, Additives known as ultraviolet absorbers, antistatic agents, stabilizers, lubricants and pigments may be appropriately selected and added.

The waterproof construction method according to the present invention comprises the steps of first applying a urethane-based adhesive to the prepared floor surface for waterproof construction to construct a primer layer, and constructing a polyolefin hollow composite sheet coated with asphalt on the upper part of the primer layer; It consists of a step of forming a waterproof coating layer by applying a polyurea coating film on the upper part of the composite sheet layer and a UV blocking layer.

a) The floor surface cleaning step to arrange the floor surface of the part to be constructed;

b) forming a primer layer by applying a urethane-based adhesive to the cleaned bottom surface;

c) installing the asphalt-coated hollow polyolefin-based composite sheet in close contact with the upper part of the primer layer;

d) forming a waterproof coating layer by applying a polyurea waterproofing material to the surface of the composite sheet exposed upward after the composite sheet overlapping construction step; and

e) It is a waterproof construction method comprising the step of forming a UV-blocking layer on the waterproof coating layer.

The polyolefin adhesive used for the primer layer and the polyurea used as a waterproofing material for the coating film should conform to the following [Table 1].

Physical properties of polyurea used in the present invention Item Quality standards coating workability Spray application for painting on structural materials
There should be no hindrance to work. Dry to touch time Mix and spray at a predetermined mixing ratio
Touch within 20 to 30 seconds after application
It should be dry. appearance Wrinkles, sagging, cracks, dents (pinholes), hardening,
There should be no defects or lumps. water

Castle tensile performance Tensile strength (N/㎟) 16 or more Market rate at break (%) 300 or more tear performance Tear performance (N/mm) 50 or more On
Degree
of
zone
Castle Tensile strength ratio (%) Test temperature -20˚C Temperature over 150 -20˚C Test temperature 60˚C Temperature 60˚C for testing over 60 adverb at break
Elongation rate (%) Test temperature -20˚C Temperature for testing over 100 -20˚C Test temperature 20˚C Temperature 20˚C for testing over 200 Test temperature 60˚C Temperature 60˚C for testing over 150 Aging treatment properties
seal of later
Performance Tensile strength ratio (%) Facilitated exposure treatment 80 or more and 150 or less accelerated exposure treatment alkali treatment 80 or more and 150 or less acid treatment 80 or more and 150 or less Sodium Chloride Treatment 80 or more and 150 or less Sodium chloride treatment at break
Elongation (%) Facilitated exposure treatment More than 250 accelerated exposure treatment alkali treatment 250 or more acid treatment 250 or more Sodium Chloride Treatment More than 250 sodium chloride treatment Deterioration properties at the time of elongation heat treatment Cracks and residues on any test piece
There should be no obvious deformation. Facilitated exposure treatment Cracks and residues on any specimen
There should be no obvious deformation. ozone treatment Cracks and residues on any test piece
There should be no obvious deformation. adhesion performance Untreated (N/㎟) adhesion strength 1.5 or higher Appearance after repeated cold and hot treatment There should be no phenomenon such as cracks, floating, peeling, etc., on any test piece. fatigue resistance Puncture of the coating film on any test piece,
No rips, breaks or wrinkles.

<Example 1>

Polyolefin-based film production

Polypropylene {Honam Petrochemical Co., Ltd. SB530} 50Kg, ethylene/propylene copolymer (Japan Polyethylene Corporation KC650T) 30Kg, functional additive (polymer obtained by grafting maleic anhydride onto EPDM rubber, trade name MacroDM; MWC-507G) 20Kg, CaCO ₃ A resin mixture composed of 8Kg, antioxidant 2Kg, UV absorber 2Kg, antistatic agent 2Kg, and lubricant 2Kg is extruded to a predetermined thickness by a known extruder to prepare a film.

<Example 2>

Manufacture of asphalt-coated hollow polyolefin-based composite sheet

Glass fiber and asphalt are sequentially applied and coated on one surface of the polyolefin film prepared in Example 1 to a predetermined thickness, and then the composite sheet is transferred to a perforator and a plurality of holes are perforated to make the final hollow self-adhesive composite sheet to manufacture A release paper is attached to one surface of the final self-adhesive composite waterproof sheet.

<Example 3>

Waterproof construction using a hollow self-adhesive polyolefin-based composite sheet coated with asphalt

First, for waterproof construction, the bottom surface of the part to be constructed is cleaned, then a urethane-based adhesive is applied to form a primer layer, and the cut polyolefin-based composite sheet of the present invention is installed in close contact thereon, and then the waterproof construction site A urethane-based adhesive is overlapped and applied to ensure good adhesion between the bottom of the composite sheet and between the composite sheets, and a waterproof coating film layer is formed by applying a polyurea waterproofing material to the entire upper surface of the composite sheet exposed at the top to a thickness of 2 to 3 mm. to form

After the above process, a UV blocking agent is finally applied to form a UV blocking layer to complete the construction.

Claims (5)

Based on 100 parts by weight of polypropylene, 50 to 70 parts by weight of an olefin-based elastomer, 30 to 50 parts by weight of a polyamide resin prepared by condensation polymerization of dimer acid and ethylene diamine as a functional additive, and 10 to 20 parts by weight of a filler And glass fiber and asphalt are applied and coated on one side of a polyolefin-based film prepared by extruding a resin mixture consisting of 30-50 parts by weight of an additive agent to form a polyolefin-based film layer, a glass fiber layer, and an asphalt layer, and transported by a perforator An eco-friendly hollow self-adhesive composite waterproof sheet coated with asphalt with a release paper attached to the side of the polyolefin-based film and perforated in the hole. delete According to claim 1,
The olefin-based elastomer is an environmentally friendly hollow self-adhesive composite waterproof sheet coated with an asphalt layer, characterized in that it is selected from ethylene/propylene copolymer rubber (EPR) or ethylene/propylene/diene copolymer rubber (EPDM rubber) . delete In the waterproof construction method using the environmentally friendly hollow self-adhesive composite waterproofing sheet (A) coated with the asphalt according to claim 1,
The floor cleaning step of arranging the floor surface of the part to be constructed,
Forming a primer layer by applying a urethane-based adhesive to the cleaned bottom surface;
Installing the environmentally friendly hollow self-adhesive composite waterproofing sheet (A) coated with the asphalt to the upper part of the primer layer in close contact;
Forming a waterproof coating layer by applying a polyurea waterproofing material to the surface of the composite sheet exposed upward after the step of closely installing the environmentally friendly hollow self-adhesive composite waterproofing sheet (A) coated with the asphalt,
A polyurea waterproofing method using an environmentally friendly hollow self-adhesive composite waterproofing sheet coated with asphalt, characterized in that it includes a step of forming a UV blocking layer on the waterproofing film layer.