KR102038306B1 - Self-adhesive waterproof sheet - Google Patents

Abstract

The present invention relates to a self-adhesive waterproof sheet which can prevent the sheet from being dried by external factors in storage, construction processes and after construction of the waterproof sheet. The sheet of the present invention comprises: a rubber asphalt layer comprising straight asphalt, a polymer modifier, and an adhesive imparting agent; a nonwoven layer provided on the rubber asphalt layer; an aluminum layer provided on the nonwoven layer; and a cover film layer provided on the aluminum layer and including high density polyethylene (HDPE).

Description

Self-drying waterproof sheet which prevents curling {SELF-ADHESIVE WATERPROOF SHEET}

The present invention relates to a self-adhesive waterproof sheet that can be attached and mounted with its own adhesive force, and more particularly, a self-adhesive type which can prevent the phenomenon of sheet drying by external factors in storage, construction process, and after construction of the waterproof sheet. It relates to a waterproof sheet.

Due to the remarkable development in the construction industry, large-scale construction projects such as highways, high-speed railways, high-rise buildings, international airports, subways, and large sports stadiums are in progress. However, many structures built with economic growth often require repair / reinforcement due to cracks and leaks. Of these areas, especially rooftops, roofs and walls require special attention when waterproofing, since rainwater can penetrate intensively. Representative waterproofing methods that have been used so far can be classified into coating waterproofing method, sheet waterproofing method, coating sheet composite waterproofing method.

Although the coating film waterproofing method has a construction effect of forming a waterproof layer without a connection site, frequent defects occur due to the nonuniformity of the waterproof layer thickness and the occurrence of air pockets and the lifting of the waterproof layer. In particular, the construction is impossible due to the moisture content and the wet state of the concrete surface. Therefore, the wet state of the concrete structure should be checked and constructed.

The sheet waterproofing method is produced by forming a certain thickness in the daylight, so the safety of the quality is excellent, but the joints inevitably occur during waterproofing. In the case of the joint part, the skill of the construction technician and the joint stability of the material are the most important factors for waterproofing.

In the composite waterproofing method of sheet waterproofing material and coating waterproofing material, the lower layer of sheet waterproofing material is dissolved or separated by the organic materials contained in the coating waterproofing material when it is manufactured and constructed in a composite form between the sheet waterproofing material and the dissimilar material of the waterproofing material. There will also be defects that result in loss of function. In addition, the longer the construction period, the lower the economic feasibility of the conventional film waterproofing and sheet waterproofing method is one of the major disadvantages.

Recently, the trend of waterproof construction has been progressed from the coating waterproofing method to the sheet waterproofing method again to the composite film coating waterproofing method. Recently, the self-adhesive sheet waterproofing method with low price and easy construction is being developed and constructed. Self-sustaining waterproof method is a construction method that is easy to install and can be installed without special construction technology. The construction speed is faster than the existing sheet waterproofing method, and it is widely used as a waterproof method that has advantages in various aspects such as air shortening.

As a conventional technology related to such a self-supporting waterproof sheet, there is a registered Patent No. 10-1863885 (May 28, 2018) (hereinafter referred to as the prior art), the prior art is a concrete without the use of heating tools and adhesives, etc. And between the horizontally-constructed discarded concrete or between the vertically-constructed concrete continuous wall, one side is fully bonded during construction, and the other side is adhesively formed by water reaction when concrete is laid in this structure, thus forming a waterproof layer integrally. To present the technology.

However, the self-supporting sheet construction method inevitably has an overlapping part between the sheet and the sheet, and in the construction part, a small part of the defect also becomes a water condition, which can be a condition that causes defects and thus develops into a fatal defect. In addition, it is time to need self-contained waterproof sheet which is easy to install even if it is cheap and excellent performance and skilled workers do not need to construct it.

In addition, the conventional self-adhesive waterproof sheet has a problem in that curling or crying occurs due to external factors such as impact, external force, temperature change, etc. during the storage, transportation, construction, and the process before being settled after construction because of a thin configuration.

The present invention has been made to solve the above problems, having both a moderate level of stiffness and plasticity, the sheet curls or cries due to external factors in the process of storage, transportation, construction, settling after installation, etc. It is an object of the present invention to provide a self-adhesive waterproof sheet to prevent such a phenomenon.

The present invention for the purpose of solving the above problems is a rubber asphalt layer comprising a straight asphalt, a polymer modifier and an adhesive imparting agent, and a nonwoven fabric layer provided on the rubber asphalt layer, and an aluminum layer provided on the nonwoven fabric layer. And a cover film layer provided on the aluminum layer and including high density polyethylene (HDPE).

The present invention having the above configuration has both a moderate level of rigidity and plasticity through the fact that the cover film layer includes high density polyethylene, and that an aluminum layer provided between the nonwoven fabric layer and the cover film layer is provided. It provides the effect that the phenomenon such as the sheet curling or crying caused by external factors in the storage, transportation, construction, and the process before being settled after construction is prevented.

1 is a cross-sectional view of the present self-supporting waterproof sheet.
2 shows a further embodiment of the present invention.

Since the present invention may be modified in various ways and have various forms, embodiments (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to the specific form disclosed, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

The terminology used herein is for the purpose of describing particular embodiments (suns, aspects, and embodiments) (or embodiments) only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms “comprises” or “consists” are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, but one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

In the present specification, the first to second and the second to refer to different components are not limited to the order of manufacture, and their names are used in the detailed description and claims of the present invention. May not match.

The present invention relates to a self-adhesive waterproof sheet that can be prevented from drying the sheet by external factors in the storage, construction process, after construction of the waterproof sheet.

Hereinafter, a self-supporting waterproof sheet (hereinafter referred to as a sheet) according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the sheet includes a rubber asphalt layer 1, a nonwoven fabric layer 2, an aluminum layer 3, and a cover film layer 4 from below.

In addition, as shown in FIG. 1, the sheet may further include a release paper 6 provided below the rubber asphalt layer 1, and the release paper 6 may store and transport the adhesive force of the rubber asphalt layer 1. And it prevents it from being expressed in other uses except for construction.

For each layer, the rubber asphalt layer 1 is in contact with the waterproof object, and includes straight asphalt, a polymer modifier added to improve physical properties of the straight asphalt, and an adhesive imparting agent added to impart a predetermined adhesive force.

Straight asphalt is a solid or semi-solid black or dark brown hydrocarbon compound that is obtained as a residue when refining petroleum. It can also be obtained naturally in oil fields and has excellent plasticity, adhesion, elasticity, malleability, and electrical insulation. Used as a moisture proof material.

The polymer modifier is added to improve the physical properties of the rubber asphalt layer (1), in particular to lower the sensitivity to temperature changes, improve elasticity and flexibility, add buffering against external impact or pressure, and improve the waterproof and storage stability Added to improve. Such polymer modifier is preferably composed of SBS (Styrene Butadiene Styrene Block Copolymer).

The adhesive imparting agent is a structure in which the rubber asphalt layer 1 can be adhered to the waterproofing object in order to have the function of the sheet as a self-adhesive waterproofing sheet, and it is preferable to include polybutene, which polybutene Non-polar hydrocarbon polymers of various molecular weights obtained by the low-temperature, cationic catalytic polymerization mainly from isoprene through purification and polymerization of C ₄ residue in pyrolysis of petrochemical Naphtha. It is chemically very stable and is not easily oxidized by light or heat. The polybutene has its own adhesive force and has been employed because of its excellent solubility in aliphatic, aromatic and chlorine solvents.

Next, the nonwoven fabric layer 2 is added to support the basic shape of the sheet, and is provided on the rubber asphalt layer 1 as described above, and additionally provides a cushioning effect for shock absorption.

The nonwoven fabric layer (2) consists of short fibers arranged in a three-dimensional web (web), not by spinning, weaving, or knitting, and then joins the fibers together by physical and chemical methods to form a fiber aggregate. And various properties depending on the web forming method and bonding method, the type of adhesive, etc., are not necessarily limited to any one embodiment in the present invention.

The nonwoven fabric layer 2 is preferably glass fiber, it is preferable to be processed into a composite material mixed with various organic materials such as polyurethane, polypropylene, polyethylene.

Next, the aluminum layer 3 is configured to prevent curling and crying by adding predetermined rigidity to the present sheet, and has both proper rigidity and plasticity to add predetermined rigidity to the sheet without losing flexibility. Aluminum is adopted.

In particular, the thickness of the aluminum layer (3) is preferably composed of 10 to 15% of the total thickness of the sheet, for example, less than 10%, the thickness of the aluminum layer (3) is too thin, the rigidity is insufficient, so that curling and crying effectively If it cannot be prevented and exceeds 15%, the thickness of the aluminum layer 3 is so thick that the plasticity is insufficient, thereby reducing the flexibility of the sheet, and the rubber asphalt layer 1 and the cover film layer, which are relatively main components of the sheet. It becomes impossible to fully secure the thickness of (4).

The more preferable thickness of the aluminum layer 3 is composed of 12% of the total thickness of the sheet, for example, if it is assumed that the thickness of the entire sheet is 0.5mm, it is composed of 0.06mm.

In addition, the sheet may be formed on the upper part of the aluminum layer 3 (between the aluminum layer 3 and the cover film layer 4), the lower part (between the aluminum layer 3 and the nonwoven layer 2) or both. It may further comprise an adhesive layer (5) provided, this adhesive layer (5) rather than forming a single layer completely, the aluminum layer (3) and the underlying non-woven layer (2), aluminum layer (3) It is preferred to be understood as a configuration that provides bonding between the cover film layer 4 and the upper portion thereof.

Preferably, the adhesive layer 5 comprises polyethylene, and the adhesive layer 5 is made of an aluminum layer 3 and a nonwoven fabric layer 2, and an aluminum layer 3 and a cover film layer 4 are unprocessed. It is added because it is not bonded in the state, and the strong adhesive force with the nonwoven fabric layer 2 and the cover film layer 4 can be ensured because the adhesive layer 5 contains a polyethylene component. At this time, it is preferable that the interface of the aluminum layer 3 is primed in order to improve the adhesive strength.

Next, the cover film layer 4 constitutes an upper surface of the sheet, which is provided on the aluminum layer 3 and is configured to provide a waterproof effect on its own, and preferably, high density polyethylene (HDPE). It is configured to include.

High-density polyethylene refers to a polyethylene having a branched structure of carbon chains of aliphatic hydrocarbons having a side chain and having a high crystallinity of at least 0.95, and has been selected due to its excellent mechanical strength and heat resistance. Such high-density polyethylene can be produced by a low pressure method (Ciegler method) using an alkylaluminum-halogenated titanium catalyst, a medium pressure method (Philips method) using a silica-alumina-chromia catalyst, and the like.

Since the cover film layer 4 including the high density polyethylene is particularly non-transparent, it has a feature that the aluminum layer 3 is not exposed to the outside at all.

On the other hand, although the construction site is protected by the cover film layer 4 and the nonwoven fabric layer 2 after the construction of the sheet, the necessity of further improving its protection remains. The present invention is to provide a method for further enhancing the protection of the sheet by further comprising a protective film on the cover film layer (4).

As shown in FIG. 2, the sheet includes a porous layer G1 provided on the cover film layer 4 at predetermined intervals and an upper portion of the porous layer G1. And a protective layer G3 covering the upper portion of the cover film layer 4 including the heating layer G2, the porous layer G1, and the heating layer G2.

Specifically, the porous layer (G1) is configured to add a buffer to the protective film (G), based on 100 parts by weight of expanded polystyrene, 5 parts by weight of antimony trioxide (Sb ₂ O ₃ ), 7 parts by weight of melamine polyphosphate and 10 parts by weight of expanded graphite.

For each composition, expanded polystyrene (Expanded Polystyrene) has a disadvantage in that it is vulnerable to flame retardancy, but was used because of the excellent thermal insulation performance and low production cost. Each composition of the porous layer (G1) is determined based on 100 parts by weight of the foamed styrene.

In addition, antimony trioxide (Sb ₂ O ₃ ) is a metal oxide obtained from the earpiece, and has been used for the advantage of having excellent flame retardancy compared to other flame retardants. The antimony trioxide is preferably included 5 parts by weight, based on 100 parts by weight of expanded styrene, when used in excess of the radical compounds generated during combustion may be harmful to the human body, and because of the relatively expensive economical Degrades.

Melamine polyphosphate (Melamine Polyphosphate) is a kind of polyphosphorylated water, which is added to form a glass coating to block oxygen access. As a result of the repeated experiments, the optimum amount of glass for forming the proper thickness is 7 parts by weight based on 100 parts by weight of expanded styrene.

And expanded graphite (Expanded Graphite) is added as a graphite compound to add a flame retardant function by generating a carbide during combustion, the preferred amount is 10 parts by weight is included, as a result of repeated experiments the weight ratio of the melamine polyphosphate is 0.7: When used as 1, the flame retardant effect was expressed to the maximum, it was concluded that it is desirable to include 10 parts by weight.

The porous layer G1 is prepared through a predetermined curing operation after dispersing the above components using water as a solvent. Here, matters related to the curing of the porous layer (G1) is to be outside the scope of the present invention and follow the conventional techniques and common knowledge of those skilled in the art.

Next, the heating layer (G2) is provided on the porous layer (G1), self-heating by receiving sunlight can be achieved by the fusion and kneading between the porous layer (G1) and the protective layer (G3) itself. Since the kneading time is longer than 24 hours at room temperature, it is configured to provide a temperature condition of about 40 ~ 60 ℃ to shorten the kneading time within 30 minutes. The exothermic layer G2 includes 5 parts by weight of manganese dioxide and 3 parts by weight of silica gel, relative to 100 parts by weight of tetrachlorogold (III) acid.

For each composition, tetrachlorogold (III) acid (HAuCl ₄ ) is a pale yellow crystal obtained by dissolving gold in aqua regia or dissolving gold (III) chloride in hydrochloric acid. It is preferable to use an average particle diameter of 15-30 nm. The following composition which comprises the heat generating layer (G2) is determined based on 100 weight part of tetrachloro gold (III) acids.

Manganese dioxide (MnO ₂ ) is a compound in which manganese and an oxide are combined, and is added to facilitate the dispersion of the heating layer (G ₂ ) and to optimize the utilization of solar wavelengths. Among the transition metals, the radiation rate and the energy efficiency in the far infrared region are good. Such manganese dioxide is prepared by sintering at about 1000 ° C. in the presence of oxygen, and the smaller the particle size is, the more the induction heating effect is increased, so that an average particle diameter of 10 to 100 nm is preferably used. It is preferable that it is 5 weight part shown.

In addition, silica gel was added to sustain the exothermic effect of the exothermic layer (G2) and shorten the exothermic saturation time, and as a result of repeated experiments, it was confirmed that the optimum exothermic efficiency was included when 3 parts by weight were included.

The exothermic layer (G2) was heated for 10 minutes at an aqueous tetrachlorogold (III) acid solution at about 100 ° C., followed by addition of a small amount of citric acid to form an aqueous solution, followed by mixing and dispersing manganese dioxide and silica gel in the blending ratio. Then, it is manufactured through a predetermined drying process. Here, the specific details of the drying process is to follow the common knowledge of the known techniques and those skilled in the art.

Next, the protective layer G3 is a basic structure of the protective film G and covers and protects the whole protective part including the above-mentioned porous layer G1 and the heat generating layer G2. The protective layer (G3) is 10 parts by weight of pozzolane, 3 parts by weight of surfactant, bentonite relative to 100 parts by weight of silica bonding water containing 5% by weight of tetraethoxysilane, 5% by weight of methyltriethoxysilane and the balance of water. 1 part by weight, hydroxyethyl acrylate 40 parts by weight and ethylene diamine tetraacetate 3 parts by weight.

For each configuration, silica-bonded water is added for the geopolymer reaction of pozzolanic, preferably containing a large amount of silica (SiO). Such silica-bonded water includes 5% by weight of tetraethoxysilane (TEOS), 5% by weight of methyltriethoxysilane (MTES) and the balance of water relative to the total weight of the bond water. Forming a network structure, methyltriethoxysilane increases the flexibility of the network. When tetraethoxysilane is added below the composition ratio, the hardness decrease of the protective layer G3 occurs. When the tetraethoxysilane is added above the composition ratio, the silica precursor content becomes high and there is a fear of cracking during drying. In addition, when the methyl triethoxysilane is used below the composition ratio, the flexibility is lowered, and when used in excess of the composition ratio, the hardness of the protective layer (G3) is lowered. The following composition which comprises protective layer G3 is based on 100 weight part of silica bonding water.

As the main binder of the geopolymer reaction, pozzolanic may be selected from natural pozzolanic such as volcanic ash, fine slag powder, fly ash, silica fume and the like. It is preferable that 10 parts by weight of such pozzolanic is used, and it is possible to exceed the composition ratio on the premise that it is not excessive.

And surfactant is added to improve workability, and bentonite is added as a viscoelastic modifier to prevent falling off to perform the function of thixotropic agent. Such surfactants and bentonite are sufficient if the commercially available product is added in the above composition ratio with reference to known techniques and general common sense. If the composition ratio is out of the ratio, the flowability may be excessive or less than the reference value.

Hydroxyethylacrylate (Hydroxyethylacrylate) is added as an adhesion promoter, and has been employed in particular because it has the advantage of excellent curability. As a result of repeated experiments, the preferred amount of use is 40 parts by weight, and when used below the composition ratio, the adhesion promoting effect is insignificant, and when used in excess of the composition ratio, the volatilization becomes high and the toxicity becomes strong.

And ethylene diamine tetraacetate (Ehtylenediaminetetracetate) is added as an adsorbent enhancer, and enhances the adsorption power during the initial construction of the protective film (G) to improve the adhesion as a result. As a result of repeated experiments, it was confirmed that the amount of use expressing the optimum adsorption enhancing effect was 3 parts by weight.

The protective layer (G3) is prepared by mixing and stirring the above components into a stirrer, followed by a predetermined drying and curing process.

In an embodiment of the construction of the protective film (G), the test block is provided with a porous layer (G1), a heating layer (G2) and a protective layer (G3) in order, and then left for 1 hour under an environment in which sunlight is irradiated. Through a kneading process and cured to form a protective film (G). The protective film G was subjected to a cross-cut test, a scratching test, a combustion test through flame spraying and an internal invasion test through water spraying, and the peel rate was less than 1%. It was less than 5%, no burning of the porous layer G1 occurred, and no internal invasion was detected.

The present invention described with reference to the accompanying drawings may be variously modified and changed by those skilled in the art, and such variations and modifications should be construed as being included in the scope of the present invention.

1: rubber asphalt layer
2: nonwoven fabric layer
3: aluminum layer
4: cover film layer
5: adhesive layer
6: release paper

Claims (4)

A rubber asphalt layer comprising straight asphalt, a polymer modifier and an adhesive imparting agent;
A nonwoven fabric layer provided on the rubber asphalt layer;
An aluminum layer provided on the nonwoven fabric layer; And
A cover film layer provided on the aluminum layer and including high density polyethylene (HDPE);
Including,
Further comprising a protective layer covering the upper portion of the cover film layer including a porous layer provided on the cover film layer at predetermined intervals, a heating layer provided on the porous layer and the porous layer, a heating layer,
The porous layer comprises 5 parts by weight of antimony trioxide (Sb ₂ O ₃ ), 7 parts by weight of melamine polyphosphate and 10 parts by weight of expanded graphite, based on 100 parts by weight of expanded polystyrene,
The heating layer includes 5 parts by weight of manganese dioxide and 3 parts by weight of silica gel, relative to 100 parts by weight of tetrachlorogold (III) acid,
The protective layer is 10 parts by weight of pozzolane, 3 parts by weight of surfactant, 1 part by weight of bentonite, relative to 100 parts by weight of silica bonding water containing 5% by weight of tetraethoxysilane, 5% by weight of methyltriethoxysilane and the balance of water. Self-adhesive waterproof sheet comprising 40 parts by weight of hydroxyethyl acrylate and 3 parts by weight of ethylenediaminetetraacetate.
The method according to claim 1,
The self-adhesive waterproof sheet further provided between the aluminum layer and the nonwoven fabric layer, between the aluminum layer and the cover film layer, or both, and comprising an adhesive layer comprising polyethylene.
The method according to claim 1,
The thickness of the aluminum layer is self-adhesive waterproof sheet, characterized in that consisting of 10 to 15% of the total thickness of the sheet.
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