KR101400648B1 - Waterproof sheet - Google Patents

Abstract

The present invention relates to a self-adhesive waterproofing sheet, and more specifically, the sheet comprises a surface layer composed of one among a thermoplastic polyolefin membrane sheet (TPO), a sheet in which long fiber non-woven fabric is laminated on the thermoplastic polyolefin membrane (TPO) sheet and a sheet spread with primer and top urethane coating on the long fiber non-woven fabric; a buffer layer; and an adhesive waterproof layer. Therefore, a self-adhesive waterproofing sheet having excellent resistance to external pressure or impact, preventing air pocket phenomenon in advance and formed by an adhesive layer having strong adhesive power for all attached surfaces, low viscosity and high adhesive power is provided.

Description

Waterproof sheet {WATERPROOF SHEET}

The present invention relates to a self-adhesive waterproof sheet, and more particularly to a self-adhesive waterproof sheet, which is obtained by adding regenerated EPDM synthetic rubber to a polymer based on butyl synthetic rubber, and is a high elastic compound without ordinary asphalt, It is not broken even under low temperature. It is not broken even at low temperature. It improves heat resistance by supplementing blister asphalt which is a thermoplastic type, and can solve the problem of dispersibility due to frictional force when mixed with synthetic rubber. Adhesive waterproof layer made of low viscosity and high adhesive strength by adding plasticizer, tackifier and the like has excellent elongation, and there is no separation of waterproof sheet due to the fluidity of the structure. There is no lifting phenomenon even if the adherend surface is rugged due to high adhesive force. It penetrates and blocks the crack area, and the mastic, Do not use the material, etc. Here you can get more features and economic effects chaksik relates to a waterproof sheet.

In general, the conventional waterproof sheet is formed by forming a waterproof layer of a certain thickness with modified asphalt on top and bottom of a nonwoven fabric, a woven fabric, a glass fiber, a film and the like, and applying PE, PVC, EVA, TPO, And a release paper (release paper) is attached to the lower part of the waterproof layer.

The above-mentioned waterproof sheet delays the air due to the excess weight of the filler added to the modified asphalt so that the weight of the product becomes uncomfortable and the waterproof layer easily breaks due to external impact under low temperature. When the waterproof sheet adheres to the concrete structure and other adhered surfaces There is an inconvenience that the adhesive surface must be melted by using a torch lamp.

In the above-described construction method, the unheated portion of the heat remains unfused, and since the waterproof sheet adheres to the adherend surface in the state where the unmelted portion exists, a portion not adhered to the adherend surface is formed do.

Therefore, leakage occurs frequently due to defects in the waterproof construction, and when the worker is in an unskilled state or when the worker makes a mistake in accordance with the condition of the day, the sheet is overheated when heated by the soil lamp, There is a fatal disadvantage that the waterproof function is lost due to frequent occurrence of the piercing phenomenon.

On the other hand, waterproof products made of liquid type (generally urethane, epoxy, urea, etc.) penetrate fine gaps well and can be easily applied to areas requiring a shape such as a corner. However, Since it takes considerable time to cure after application, the labor cost rises, and on the other hand, there is a problem that the smell is generated for the solvent, which is a cause of complaints and there is a limit to the use.

In addition, the coated liquid-type non-visible waterproofing method has a problem in that when the mortar or soil is poured, the waterproof layer may break or be broken due to external impact due to thinning of the solvent after volatilization.

Meanwhile, the self-adhering asphalt waterproof sheet disclosed in the prior art exhibits adhesion force at a certain temperature or more, so that it can adhere to the adherend surface. However, since the material constituting the waterproof sheet becomes hard at low temperature, Although the plasticizer is added in an excessively high amount in order to strengthen the adhesion at low temperature, the adhesion function is improved at a low temperature, but the waterproof function is lost due to the phenomenon that the waterproof sheet flows down even at low temperatures and the waterproof sheet easily pierces due to external impact .

Particularly, when the waterproof layer of the conventional waterproof sheet is formed with the butyl compound and then adhered to the base surface, if the external heat is transferred to the waterproof layer (butyl layer) over time, the plasticizer contained in the waterproof layer As the air is vaporized, an air pocket phenomenon occurs in the waterproof layer (butyl layer), and such an air pocket phenomenon causes floating of the base and the waterproof layer.

The present invention, which is devised to solve the upper limit problem, comprises a composition of a top and a bottom with a double structure, wherein the upper composition is a regenerated EPDM having a saturated hydrocarbon bond in the form of fine powder in a polymer based on butyl synthetic rubber The synthetic rubber is added to protect the external impact, and at the same time, it is prevented from falling down at high temperature, preventing its own air poket phenomenon, improving weatherability and tensile strength, and minimizing heat transfer to the lower waterproof layer The air pocket phenomenon in the lower waterproof layer is minimized to prevent lifting of the waterproof layer and the lower composition is formed of a low viscosity and high adhesion compound by adding a plasticizer and a tackifier to the butyl synthetic rubber , The elongation is excellent, the separation of the waterproof sheet due to the fluidity of the structure is excluded, and a fine gap So that the surface layer is prevented from being desorbed even at a low temperature and a high temperature.

The object of the present invention is to provide a thermoplastic polyolefin membrane (TPO) sheet, a sheet laminated with a long fiber nonwoven fabric on a TPO (Themoplastic Polyolefin Membrane) sheet, and a long fiber nonwoven fabric sheet in order to reinforce elasticity and elongation while preventing oxidation by ultraviolet rays and oxygen. A surface layer made of any one of a sheet coated with a middle or top coat urethane; (EPDM), 2-10 wt% of thermoplastic Blown asphalt, 5-10 wt% of ethylene-propylene rubber, and the like. Butyl rubber, 6-29 wt% plasticizer, 4-16 wt% tackifier, 5-42 wt% filler, 0.2-3 wt% oxidation and antioxidant, 2- A buffer layer composed of 8 wt% phenolic resin; A buffer synthetic rubber, 5-22% by weight of a synthetic rubber, 6-28% by weight of a plasticizer and a softener, 6-30% by weight of a tackifier, 4-35% by weight of a tackifier, % Of fillers, 1-3 wt% of an anti-flow agent, 1-5 wt% of an accelerator, and 0.2-2 wt% of an oxidation and anti-aging agent. do.

It is another object of the present invention to provide a method of manufacturing a semiconductor device, which comprises the steps of: preparing a substrate made of a material selected from the group consisting of polyester (PE), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), polyethylene terephthalate A surface layer in which any one or at least two or more of the nonwoven fabrics are laminated; (EPDM), 2-10 wt% of thermoplastic Blown asphalt, 5-10 wt% of ethylene-propylene rubber, and the like. Butyl rubber, 6-29 wt% plasticizer, 4-16 wt% tackifier, 5-42 wt% filler, 0.2-3 wt% oxidation and antioxidant, 2- A buffer layer composed of 8 wt% phenolic resin; A buffer synthetic rubber, 5-22% by weight of a synthetic rubber, 6-28% by weight of a plasticizer and a softener, 6-30% by weight of a tackifier, 4-35% by weight of a tackifier, % Of fillers, 1-3 wt% of an anti-flow agent, 1-5 wt% of an accelerator, and 0.2-2 wt% of an oxidation and anti-aging agent. do.

Here, the regenerated EPDM (Ethylene, Propylene, Non-conjugated Diene) of the buffer layer is a desulfurized regenerated EPDM powder, and the plasticizer of the adhesive waterproof layer is prepared by adding all the plasticizers to a tank heated to 65 ° C to 80 ° C, .

The self-adhesive type waterproof sheet according to the present invention can be used to alleviate impact and add synthetic rubber (a composition compounded with a new material, a recycled synthetic rubber, a promoter, an olefin type, etc.) to a filler, a plasticizer or a thermoplastic rubber It is not easily broken or broken in the fluidity of external impacts (mortar, work tool, etc.) or structure, and cold resistance and heat resistance are improved.

In addition, the buffer layer formed with high elasticity has a high viscosity, which prevents the deterioration of productivity due to the increase of frictional force index during production by adding blun asphalt, which is a thermoplastic type, to the problem of dispersibility due to frictional force when compounding rubber. By reducing the use amount of the plasticizer, the heat resistance can be rather improved and the tensile strength is increased even at a low temperature.

The adhesive waterproof layer is made of low viscosity and high adhesive force by adding plasticizer, alkylphenol resin, petrochemical resin, etc. in addition to general polymer, and it can be adhered without any other tool and can be easily constructed without needing long experience Not only economical gain due to shortening of the number of people and shortening of air, but also adhesion at the rugged surface of the structure due to low viscosity and high adhesion, as well as excellent cold resistance, enabling construction in winter and low viscosity The polymer penetrates into the gap and blocks the gap to provide a more reliable waterproof function, so that there is no leakage water even if cracks occur in the structure.

Since the surface layer according to the present invention can be formed on the upper surface of the buffer layer by dividing the surface layer into a common use and a non-standard release when exposed according to the construction method, the waterproof sheet can be selectively applied according to the waterproofing method, The tensile strength is improved, the waterproof sheet is not broken at a low temperature, the detachment of the waterproof sheet is prevented against shrinkage of the waterproof sheet due to the temperature change, and the surface is not easily oxidized even under harsh external environment.

Hereinafter, the structure of the self-adhesive waterproof sheet according to the present invention will be described in more detail.

The self-adhesive waterproof sheet according to the present invention has a structure in which a surface layer, a buffer layer, and an adhesive waterproof layer are sequentially arranged from the top to the bottom.

Since the self-adhesive waterproof sheet according to the present invention is of a self-adhesive type, a release paper can be additionally formed on the lower surface of the adhesive waterproof layer as needed for the adhesive strength of the adhesive waterproof layer and the convenience of production.

The surface layer is configured to protect the surface from external impacts such as worker, mortar, soil abrasion and the like.

The first and second embodiments of the self-contained waterproof sheet of the present invention can be divided into an exposed surface layer and a non-exposed surface layer according to the structure of the surface layer, and the buffer layer and the buffer layer of the first embodiment, Since the buffer layer of the second embodiment is the same composition and the adhesive waterproof layer of the first embodiment and the adhesive waterproof layer of the second embodiment are the same composition, the composition of the buffer layer and the composition of the adhesive waterproof layer are not described separately for each example.

In other words, in the first and second embodiments, the surface layer is excellent in stretchability and elasticity, and is provided on the top thereof in order to protect the buffer layer. In the first embodiment, when the waterproof construction is an exposure waterproof construction, And the second embodiment is constituted by a surface layer suitable for a non-exposed type in the case of an unexposed waterproofing construction.

That is, the first embodiment, in which the surface layer is formed so as to be suitable for the exposed type, is characterized in that it is reinforced with elasticity and elongation while preventing gravel, large sand, A sheet of TPO (Themoplastic Polyolefin Membrane) sheet, a sheet of TPO (Themoplastic Polyolefin Membrane) sheet laminated with a long fiber nonwoven fabric, and a sheet of long or medium nonwoven fabric coated with middle or top urethane.

In addition, the second embodiment of the surface layer prepared to be suitable for the non-visible waterproofing application is made of polyester (PE), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA) , Polyethylene terephthalate (PET), and nonwoven fabric, or at least two or more of them are laminated.

The thicknesses of the exposed surface layer and the non-exposed surface layer are preferably set within a range of 0.8 mm to 2 mm, and the elongation is preferably 250% or more.

On the other hand, the buffer layer formed on the lower surface layer is formed below the surface layer and absorbs the impact with high elasticity. The buffer layer contains 2-10 wt% of recycled EPDM (ethylene, propylene, non-conjugated diene) Blown Asphalt, 5-15% butyl rubber, 6-29% plasticizer, 4-16% tackifier, 5-42% filler, 0.2- 3% by weight of an oxidation and antioxidant, and 2-8% by weight of a phenolic resin.

Among the compositions of the buffer layer, EPDM (ethylene, propylene, non-conjugated diene) is a saturated hydrocarbon of a terpolymer and a thermoplastic synthetic rubber of a nonpolar type and has excellent ozone resistance, excellent weather resistance, excellent cold resistance and heat resistance ) And excellent chemical resistance to polar materials. In the present invention, recycled EPDM, which is inexpensive and can satisfy the impact reinforcing properties required in the buffer layer, is added instead of the new EPDM.

When the regenerated EPDM is added after the desulfurization, compatibility with other resins is remarkably decreased, and compound hardening occurs due to sulfur, which is a crosslinking agent, or uncured due to a plasticizer in the compound. In the present invention, And then added.

The regenerated EPDM desulfurization method may be a chemical method or a physical method. In the present invention, the unfoamed regenerated EPDM is pulverized to 3-5 mm by mixing two methods, Surfactant, accelerator, ilite, and regenerated EPDM are mixed for 1-2 hours, desulfurized and then cooled.

The desulfurized regenerated EPDM as described above is included in an amount of about 2-10% by weight based on the total weight of the composition of the buffer layer.

When the amount of the recycled EPDM is less than 2% by weight, the effect of improving the weatherability by the unit price reduction, the high elasticity and the ultraviolet ray shielding is insignificant, so that the recycled EPDM is preferably contained in an amount of 2% by weight or more.

On the other hand, if it exceeds 10% by weight, the water repellency of the waterproof sheet increases due to the decrease of the adhesion function, the decrease of the dispersing ability due to the increase of the specific gravity, .

The thermoplastic type blown asphalt of the present invention is produced by blowing air having a high temperature of 220-250 DEG C to petroleum asphalt for a long time (20-35 hours) to oxidize oxygen in the air, (Asphaltene), which has a higher content of asphaltene and less petroleene content than straight asphalt, which causes a rise in softening point, an increase in impact resistance, an increase in tensile strength, Is less asphalt.

Generally, in the case of the above blunting asphalt, when the basic raw material of the waterproof sheet is asphalt, the addition of the blunting asphalt improves the softening point, the impact strength and the like, but the application is hardly applied to the waterproof sheet due to the increase in the unit price and the decrease in the cold resistance.

However, in the present invention, since the basic raw material of the waterproof sheet is added with the composition of butyl synthetic rubber, the blun asphalt is added, so that the blown asphalt becomes liquid in the kneader blending operation at a high temperature while reducing the price.

That is, the blown asphalt is a polymer that improves compatibility and dispersibility of each polymer as a plasticizer, improves heat resistance by increasing the softening point in the form of a highly viscous waterproof sheet, and improves the bonding force between the respective polymers.

The blun asphalt contains an amount of 2-10 wt% based on the total weight of the composition of the buffer layer according to the present invention.

When blun asphalt is contained in an amount of less than 2% by weight, the plasticizer acts and impact resistance are improved and the bonding strength between the polymers is little. On the other hand, when the content is more than 10% by weight, the compound hardens at low temperatures, asphaltene, the adhesive strength decrease phenomenon dl occurs. Therefore, it is preferable that the content of blun asphalt is 10 wt% or less.

Butyl (IIR = isobutylene-isoprene) synthetic rubber in the composition of the buffer layer is a rubber obtained by ion-polymerizing isobutylene and a small amount of isoprene in a liquid state at a low temperature.

Since butyl rubber does not crystallize well, the butyl rubber has flexibility at low temperatures as low as -50 ° C. It has low resistance to heat, ozone, and oxidizer because of its low unsaturation. It has excellent weather resistance and gas permeability. And has excellent electrical insulation and shock absorption, and is widely used in industrial and construction applications.

A small amount (1-3%) of isoprene is an unsaturated hydrocarbon bond which improves the compatibility of other polymers, improves the tackifier function, and enables the vulcanization function among other polymers. Nowadays, Halogenated butyl rubbers (BIIR, CIIR) prepared by reacting bromine (B) and chlorine (Cl) atoms in the state of dissolving the fluorine-containing polymer (B) have improved compatibility between the polymers and improved adhesion, increased flame retardancy, The resistance of the oxidizing agent is lowered and the weather resistance of the product is somewhat deteriorated.

In addition, halogenated butyl rubber vulcanizates are less water resistant than general butyl rubber and contain less utility for electrical insulation because they contain small amounts of vulcanization by-products, which are mainly water-soluble salts.

The butyl rubber of the above characteristics is contained in an amount of 5-15% by weight based on the total weight of the composition of the buffer layer.

If the amount of the butyl rubber is less than 5% by weight, the elasticity, elongation and tensile resistance of the filler are decreased, and the bonding force in the compound is lowered at a high temperature to decrease the heat resistance and increase the specific gravity. The content of isoprene (isoprene) is remarkably deteriorated due to the small content of isoprene, the saturation degree is low due to the insufficient content of butyl synthetic rubber, and the weatherability of the product is remarkably deteriorated due to ozone, heat, oxygen in the air and the like.

On the other hand, if it is added in an amount exceeding 15% by weight, the elasticity and tensile resistance increase, the adhesive force increases due to the increase of the content of isoprene, and the bonding force in the compound increases at high temperature to improve the heat resistance. On the other hand, Due to the increase of the content of the strong butylated rubber, the dispersing power is lowered and the viscosity of the compound is increased, the production becomes difficult. Therefore, the production cost is lowered and the labor cost and the production cost are further increased and accordingly the manufacturing cost is increased. .

The softener and plasticizer in the buffer composition of the present invention are classified into vegetable and petrochemical, and vegetable oils include linseed oil, pizza oil, refined oil and vegetable oil, and linseed oil contains a large amount of unsaturated acids such as linoleic acid and linolenic acid, It is very important as a drying oil.

When it is left in the air, oxygen is absorbed and polymerized to give rinoxin, a translucent, water-resistant, macromolecular substance, widely used in industrial applications such as paints, varnishes, and printing inks.

Rice seed oil is an oil that is oiled in oilseed rape seeds, and it is an environmentally friendly oil with improved sticking power.

Vegetable refined oils are less toxic than petroleum fuels, and are less environmentally polluting substances such as soot. They are environmentally friendly bio oils that can be used as clean fuel to prevent environmental pollution and recycle.

Nowadays, refined oil can be effectively used as an alternative to fuels such as kerosene and diesel oil for industrial power generation facilities and boiler fuel.

In the present invention, a vegetable oil is partially added with a plasticizer to effectively use its function as an environmental aspect and a tackifier.

In the present invention, petroleum chemical oil is generally added, but some refined oil is also added. As the petrochemical oil, an optimal plasticizer mixed with one kind or two or three kinds of process oil, polybutene, refined oil, DOP and DOA is used.

The function of this plasticizer is to assist in imparting an adhesive function, improving compatibility between polymers, imparting plasticity in a compound to improve processability, changing physical properties and having excellent properties, and increasing flexibility in wares, sheets, PVC films, Improve cold resistance, and enhance electrical properties.

DOP (di-2-ethylhexyl phthalate), DOA (di-octyl adipate) and DOA (di-octyl adipate) are plasticizers that are widely added to plastics and have excellent viscosity stability, excellent cold resistance (-60 to -50 ℃), increased heat resistance, And compatibility with other synthetic rubbers. In the present invention, a small amount of a plasticizer having such properties is selected by selecting one of the plasticizers, and a smaller effect than other plasticizers can be obtained.

In particular, flexibility and cold resistance are excellent plasticizing agents.

Process oil in petrochemical oils is generally classified as naphthenic oil or aromatic paraffin oil. Double naphthenic oil contains 40-50% naphthene purified through a special refining process and has a high molecular weight It is suitable for machining work at high temperature and is suitable for the processing of wire and synthetic rubber (natural rubber, SBR, CR) with low evaporation loss, excellent cold resistance, less heat generation and elasticity retention of compound And is also widely used in asphalt waterproofing sheets, coating materials, road pavement, mastic and the like, which are excellent in compatibility with aromatic compounds and asphalt which is a saturated hydrocarbon bond type, and the composition of the compound is based on asphalt.

Naphthenes have good compatibility with aliphatic compounds and aromatic compounds.

Among the process oil, saturated paraffin oil of hydrocarbon is not easily processed, but it is excellent in anti-staining property, low temperature property, high elasticity maintenance and oxidation stability of the product made of synthetic rubber, And discoloration and fouling of heat are extremely small, and water separation property is excellent, so that it does not cause emulsification upon water absorption.

Although it is hardly applicable to asphalt systems, it is compatible with synthetic rubbers such as BUTYL, NR, SBR, BR, and EPDM.

Particularly, since it is a saturated hydrocarbon form, it prevents oxidation due to ultraviolet rays and oxygen in the air, so that the weather resistance of the product is improved.

Adhesive type (tape type) As a plasticizer of butyl compound, polybutene is generally used, and it is very stable even under ultraviolet ray exposure, has self-adhesive property, increases adhesion force with increasing molecular weight and viscosity, It is a plasticizer containing the characteristics that it is highly pure and not toxic due to extremely low chlorine and sulfur content without additives, chemically stable and not easily oxidized by light or heat.

In the present invention, polybutene containing such characteristics is added to a butyl compound, which is a disadvantage of the prior art. As a result, it has been found that, under high temperatures, And other disadvantages.

It is possible to manufacture a waterproof sheet having improved heat resistance, increased cold resistance and tackiness-imparting function by adding polybutene to the composition of the present invention buffer layer, It is excellent in compatibility and excellent adhesive function by mixing isoprene, polybutene and resin acting as adhesion function among monomers (butyl monomer). It is easy to install without needing any tools, .

In addition, since polybutene has little volatility, it does not harden even after a long period of time, and acts to simultaneously improve cold resistance and heat resistance.

Therefore, when polybutene is further contained in the butyl compound composition according to the present invention, the flexibility of the waterproof sheet, the cracking phenomenon and the run-down phenomenon under the high temperature exposure are caused when the conventional asphalt waterproof sheet has a problem over a long time Can be prevented.

In particular, since a low molecular weight low viscosity and a high viscosity high molecular weight are mixed with one kind of polybutene, the adhesive function and heat resistance can be greatly improved.

The characteristic of the plasticizer of the buffer layer composition of the present invention is that it is different from other companies in that the plasticizer is put into the heated (80-100 ° C) tank and the special additives are added to improve the compatibility. Min-1 hour after mixing.

The plasticizer thus prepared is preferably added in an amount of 6 to 29% by weight based on the total weight of the high-elasticity impact modifier layer composition.

When the plasticizer is added in an amount of less than 6% by weight, the flexibility of the product is lowered, the adhesive function is lowered due to the higher viscosity, the waterproof sheet becomes harder at low temperatures and the construction becomes inconvenient, The viscosity of the composition is lowered, and the waterproof sheet is pushed by the workers at the time of construction because the viscosity of the composition is lowered and the water falls down at a high temperature again. The waterproof sheet is not uniformly removed when the release film is peeled off, Work time delay due to inconvenience and increase of labor cost lead to increase of the cost of construction, and the tensile strength of the waterproof sheet also deteriorates.

Therefore, the upper limit of the content of the plasticizer is preferably 29% by weight.

When a natural resin, a petrochemical resin, or the like is added to the tackifier in the composition of the present invention, adhesion of each polymer, adhesive strength of the waterproof sheet, heat resistance, and the like are improved.

The above-mentioned natural resin generally refers to the resin, which is a resin widely used before the development of a petrochemical resin. The petrochemical resin is an aliphatic compound having a benzene nucleus and an aromatic compound (benzene, toluene, xylene, phenol) (C-5 / C-9) petrochemical resin added to the aliphatic petrochemical resin (C-5) in a small amount in the present invention is classified into a compound (methanol, formaldehyde, polyethylene and acrylonitrile).

The petrochemical resin is preferably contained in an amount of 4 to 16% by weight based on the total weight of the buffer layer composition of the present invention. When added in an amount of less than 4% by weight, the addition of a small amount of a petrochemical resin having a high stiffness reduces the cost of the waterproof sheet, but the function of the waterproof sheet is lost due to the loss of the adhesive function. The heat resistance of the waterproof sheet deteriorates. When the waterproof sheet is added in an amount of 16 wt% or more, the petrochemical resin causes an increase in the price of the waterproof sheet due to the high-end, and the waterproof sheet becomes hard at low temperature, It is easily oxidized by other environments and weather resistance of the waterproof sheet is lowered.

Further, the heat resistance of the waterproof sheet may deteriorate due to an increase in the content of the plasticizer.

Particularly, in the present invention, even when a small amount of aromatic aliphatic (C-5 / C-9) is added to the surface of the adherend, even if the primer is applied to the surface of the adherend, to be.

As the filler in the buffer layer of the present invention, various fillers can be used, but it is preferable to use calcium carbonate (CaCO3), cray, talc, hempite, bentonite, fibers, sawdust, rice hull and the like.

Calcium carbonate is the most abundant salt in the natural world and its shape is various. It is present in marble, calcite, wire, limestone, chalk, gypsum, shell, etc. Colorless crystals or white solid with specific gravity of 2.9, It is decomposed, carbon dioxide is generated and quicklime can be obtained.

Clay is an aggregate of fine grains formed by rocks, weathering and denaturing of minerals, that is, fine grains of fine grains of usually 2 ㎛ or less. It is used for a wide range of applications such as ceramics, refractories, foundry sand, paper additives, various fillers, adsorbents.

Bentonite is a clay mineral originating from volcanic ash derived tuff and fine vitreous rhyolite. It is mainly composed of montmorillonite, which is a bedded silicate mineral. It absorbs water and swells to several times its original volume.

The bentonite according to the present invention can be firmly adhered to concrete by reaction with concrete by adding bentonite higher than other minerals having different cation exchange capacity, and the bentonite expands when water flows into a structure crack after adhesion of the waterproof sheet.

In addition, in the present invention, by adding one or two kinds of sawdust or rice husk made of burned powder, a waterproof sheet can be manufactured with a low specific gravity so that workers can conveniently use the product for transportation and construction while reducing the unit price.

In addition, the above-mentioned raw material has an excellent absorbing ability and can prevent the waterproof sheet from flowing down at a high temperature. A small amount of cellulose, which is a fibrous material, can be added to the filler, and the low specific gravity and the effect of preventing the falling of the filler are excellent.

It is preferable that the filling material contains 5-42 wt% based on the total weight of the composition of the buffer layer. If the amount is less than 5% by weight, addition of other high-cost raw materials will increase the product cost of the waterproof sheet, and the bonding strength with other raw materials will be lowered and heat resistance may be deteriorated. Some of which may result in clumping. On the other hand, when the content exceeds 42% by weight, the flexibility of the waterproof sheet tends to be poor, resulting in inconvenience in construction. In addition, due to the relatively low content of rubber or tackifier, the laminated film is detached at low temperature, There is a phenomenon that the waterproof sheet is easily oxidized due to heat, oxygen in the air, and the like, and weather resistance is deteriorated.

The antioxidant in the composition of the buffer layer according to the present invention is generally used as a mixed phenolic antioxidant most commonly used. It is known as a primary antioxidant as a radical scavenger and is used to protect the resin during the use of plastic, synthetic rubber or finished product By weight based on the total weight of the composition. If it is contained in an amount of less than 0.2% by weight, the waterproof sheet is easily oxidized by oxygen in ultraviolet rays, heat and air owing to the inefficiency of the oxidizing agent, and the weather resistance of the waterproof sheet is remarkably deteriorated. On the other hand, when it is contained in an amount exceeding 3% by weight, the weatherability is improved to some extent, but the effect is not great.

This is because, when the antioxidant is added in an excessive amount due to ultraviolet rays and substances which are easily oxidized to the external environment, only the result of raising the unit price of the product rather than the effect is caused.

In the composition of the buffer layer according to the present invention, the phenolic resin is added for supplementing the deficient function of the petrochemical resin and acting only as a phenolic resin. Phenol resin is an additional condensation product of phenol and formaldehyde. It has excellent heat resistance, flame retardancy and adhesive strength. Applications include rubber compounding, hot melt bonding, wrapping adhesive, acrylic adhesive Is used.

The phenolic resin is preferably contained in an amount of 2-8% by weight based on the total weight. If added in an amount of less than 2% by weight, improvement in heat resistance and adhesion can not be expected. On the other hand, if it is added in an amount exceeding 8% by weight, I am concerned.

The buffer layer thus formed prevents the waterproof sheet from breakage due to high elasticity and excellent stretchability at the time of external shock while minimizing the price of the product and enables the construction in the winter due to the flexibility of the waterproof sheet at low temperature.

Below the cushioning layer, a low-viscosity, high-adhesion, water-repellent, water-repellent layer is applied and the water-repellent layer functions to securely adhere the water-repellent sheet of the present invention to a structure such as concrete.

The adhesive waterproof layer comprises 5 to 22 wt% of butyl rubber, 6 to 28 wt% of plasticizer and softener, 6 to 30 wt% of tackifier, 4 to 35 wt% of filler, 1-3 % By weight of flow inhibitor, 1-5% by weight of accelerator, 0.2-2% by weight of oxidation and antioxidant.

In the present invention, the adhesive waterproof layer secures the drawbacks of the coating film reclaiming method, the mastic method, and the adhesion waterproofing sheet method, thereby lowering the viscosity of the adhesive waterproof layer and improving the adhesive strength, and improving the permeability of the solvent formed by the aliphatic hydrocarbon bond So that the adhesive waterproof layer of the waterproof sheet is flexible in a certain environment, particularly at low temperatures, and has a strong adhesive force so that it can be firmly attached to a structure such as concrete.

In the present invention, the composition of the adhesive waterproof layer comprises butyl rubber, a plasticizer and a softener, a tackifier, a filler, an anti-flow agent, an accelerator, an antioxidant and penetrates into fine gaps of the surface to be adhered, A strong adhesive force can be exerted on the adherend surface.

Therefore, unlike the conventional art, there is no need to attach a waterproof sheet using any tool, and thus the construction of the waterproof sheet is very fast and convenient.

The butyl rubber described above is prepared by dispersing and softening the condensed polymer using a roller and then adding butyl rubber to the mixer such as Kneader or Banbury heated at 80 ° C to 100 ° C, a minimum plasticizer, a tackifier, A filler, a flow inhibitor, an accelerator, an antioxidant, etc., in order.

In this method, the plasticizer should be added at a minimum amount so that the compound is not easily adhered to the mixer, so that it can be easily removed. Then, the plasticizer is added to the special low-viscosity special mixer and then the remaining plasticizer is added and mixed for about 1-2 hours.

The low-viscosity high-pressure-sensitive adhesive composition produced by the above-mentioned method maximizes the adhesive force, so that it can be adhered to any surface of the adhesive surface smoothly without penetration, penetrating into fine gaps and exhibiting excellent waterproof performance.

Therefore, when the temperature is low, which is a problem of the conventional self-adhesive type waterproof sheet, it is possible to solve the problem of low adhesive strength and necessity of an auxiliary mechanism and increase in labor cost when the waterproof sheet is lifted.

In the present invention, the butyl rubber in the adhesive waterproof layer composition is preferably contained in an amount of 5 to 22% by weight based on the total weight. When less than 5% by weight is added, the compound of the adhesive waterproof layer is easily oxidized by oxygen in the ultraviolet rays, heat, and air owing to the insufficient content of the butyl synthetic rubber as the pressure sensitive adhesive, and the weather resistance of the waterproof sheet is lowered. the adhesive function is lost due to insufficient amount of isoprene, and the bonding force between the respective polymers is lowered so that the heat resistance is lowered, and accordingly, the waterproof sheet may flow down at a high temperature.

On the other hand, when it is added in an amount exceeding 22 wt%, the content of the raw material which is relatively low is lowered and the content of the butyl synthetic rubber which is a high unit price is increased to increase the price of the product. It causes poor physical properties and labor costs, and also lowers the productivity and raises the price of the product.

In the present invention, a small amount of high molecular weight PIB (poly isobutylene) synthetic rubber having a molecular weight of more than 1 million was kneaded to improve tensile strength, heat resistance, and the like. Butyl synthetic rubber is a polymer with excellent ultraviolet rays, weather resistance and adhesion by sunlight.

The plasticizer in the adhesive waterproof layer composition according to the present invention is a plasticizer in which one kind or four to seven kinds of plasticizers are classified into process oil, refined oil and vegetable refined oil based on polybutene having a large molecular weight among plasticizers. Put into the tank heated (80-100 ℃) according to the following procedure.

That is, any of DOP and DOA, which is excellent in viscosity stability and excellent in cold resistance (-60 ° C to -50 ° C), is excellent in polybutene excellent in molecular weight, excellent in compatibility, excellent in non-toxicity and weatherability, A small amount of petrochemical or vegetable refined oil is added in small quantities by adding a small amount, good compatibility, and low price, thereby remarkably improving the cold resistance, weather resistance and adhesive function.

The plasticizer is preferably contained in an amount of 6 to 28% by weight based on the total weight of the adhesive waterproof layer composition. If it is contained in an amount of less than 6% by weight, a uniform physical property can not be obtained due to a decrease in the dispersibility between the respective polymers, resulting in a deterioration of the quality of the waterproof sheet, a deterioration in the flexibility of the compound, The weatherability is degraded. On the other hand, if it is contained in an amount exceeding 28% by weight, the cold resistance is improved, but the waterproof sheet is flowed down at a high temperature, and the elasticity and tensile strength of the adhesive waterproof layer are lost.

Among the adhesive waterproof layer compositions according to the present invention, a petrochemical resin is used as a tackifier, and it has an adhesive function and a function of increasing the bonding strength between the raw materials. An aliphatic compound to which an aromatic compound is added is added in order to exhibit an adhesive function irrespective of the surface of the adhered surface, that is, the primer before attachment of the waterproof sheet, and a resin having a softening point of about 90 ° C and a petrochemical resin having a softening point of about 110 ° C It is preferable to mix them.

In order to maximize the adhesive force to such a composition, a high molecular weight rosin ester obtained by reacting a natural resin with a petrochemical resin is added. In the present invention, a terpene phenol resin is added in order to maximize late adhesion, heat resistance and bonding force.

The content of the tackifier as described above is preferably 6 to 30% by weight. If the content is less than 6% by weight, the adhesive property can not be adhered to the waterproof sheet structure due to the deterioration of the adhesive function, and the effect of improving the bonding performance between the raw materials is insignificant. On the other hand, The content of the tackifier increases the price of the product, and the phenomenon that the waterproof sheet is hardened and the fluidity is lowered at a low temperature can not be avoided and the adhesive function is rather lowered.

The filler in the composition of the adhesive waterproof layer according to the present invention has an advantageous effect in increasing the bonding force between the respective polymers and improving the heat resistance to prevent the adhesive waterproof layer from flowing down even at a high temperature. Various fillers can be used, but calcium carbonate, clay, bentonite and the like are preferably used, and it is preferable that they contain 4-35% by weight based on the total weight of the low viscosity and high viscosity waterproof layer. If the content is less than 4% by weight, the bonding strength between the other raw materials is lowered to deteriorate the heat resistance. On the other hand, if the content exceeds 35% by weight, the adhesive waterproof layer becomes hard and inconvenient in low temperature, The flexibility and the adhesive function of the adhesive layer deteriorate and the adhesive waterproof layer is easily oxidized due to the external environment and the weather resistance is lowered.

The flow inhibitor of the adhesive waterproof layer composition according to the present invention is added with fibers such as cellulosic, clay, sawdust and the like. Particularly, when the temperature of the low viscosity and high viscosity waterproof layer is low due to the low viscosity, the low viscosity compound flows down. It is possible to obtain the effect of preventing the viscosity and the heat resistance by adding one or two kinds of the above raw materials.

The flow inhibitor is preferably contained in an amount of 1 to 3% by weight based on the total weight. If the amount is less than 1% by weight, the compound flows down at a high temperature due to a small amount. On the other hand, when the amount is more than 3% by weight, the content of the butyl rubber is less than that of the general filler, And the absorbency is very excellent, so that all of the introduced plasticizer is absorbed and the adhesive waterproof layer becomes hard.

The accelerator in the adhesive waterproof layer composition according to the present invention is a high quality waterproof sheet produced by adding a raw material having excellent solubility, low boiling point, low volatility, and excellent color stability and dispersing power in an aromatic solvent. The accelerator is preferably contained in an amount of 1-5% by weight based on the total weight. If it is added in an amount of less than 1% by weight, no effect can be obtained. On the other hand, if it is added in an amount exceeding 5% by weight, the price of the product increases, and the flash point is high.

The antioxidant in the adhesive waterproof layer composition according to the present invention is generally known as a primary antioxidant as a radical phenolic antioxidant, which is the most commonly used mixed phenolic antioxidant, and protects the resin during the use of plastic, synthetic rubber or finished product By weight based on the total weight of the composition. If it is contained in an amount of less than 0.2% by weight, the waterproof sheet is easily oxidized by oxygen in ultraviolet rays, heat, or air owing to the inefficiency of the oxidizing agent, and the weather resistance of the waterproof sheet is remarkably deteriorated. On the other hand, when it is contained in an amount exceeding 2% by weight, the weatherability is improved to some extent, but the effect is not significant. Because of the ultraviolet rays, which are basically ultraviolet rays and easily oxidized to the external environment, the excessive addition of the antioxidant results only in an increase in the unit price of the product rather than the effect.

As described above, the self-adhesive waterproof sheet according to the present invention is different from the conventional waterproof sheet in that it is made of a buffer layer for relieving impact with high elasticity and an adhesive waterproof layer of low viscosity and high adhesion, It is a self-adhesive waterproof sheet which is greatly increased, excellent in waterproof performance, and can reduce production cost.

Further, when the concrete is laid on a durable waterproofing sheet, it is possible to prevent the waterproofing sheet from being damaged by impact or physical force in the pouring operation.

Particularly, as described above, butyl rubber is added to the buffer layer and the adhesive waterproof layer so that the compound is formed in both the buffer layer and the adhesive waterproof layer. By making the hardness of the buffer layer harder, So that the air pocket phenomenon caused by vaporization of the plasticizer in the compound of the adhesive waterproof layer can be minimized and the floating of the waterproof sheet can be prevented in advance.

Claims (4)

A sheet of TPO (Themoplastic Polyolefin Membrane) sheet, a sheet of TPO (Themoplastic Polyolefin Membrane) sheet laminated with a long-fiber nonwoven fabric and a sheet of long-fiber nonwoven fabric to which intermediate and top urethane A surface layer made of any one of the applied sheets;
(EPDM), 2-10 wt% of thermoplastic Blown Asphalt, 5-10 wt% of ethylene-propylene rubber, and the like. Butyl rubber, 6-29 wt% plasticizer, 4-16 wt% tackifier, 5-42 wt% filler, 0.2-3 wt% oxidation and antioxidant, 2- A buffer layer composed of 8 wt% phenolic resin;
A buffer synthetic rubber, 5-22% by weight of a synthetic rubber, 6-28% by weight of a plasticizer and a softener, 6-30% by weight of a tackifier, 4-35% by weight of a tackifier, % Of filler, 1-3 wt% of flow inhibitor, 1-5 wt% of accelerator, 0.2-2 wt% of oxidation and anti-aging agent. (PE), a polyvinyl chloride (PVC), an ethylene-vinyl acetate copolymer (EVA), a polyethylene terephthalate (PET) A surface layer on which more than one layer is laminated;
(EPDM), 2-10 wt% of thermoplastic Blown asphalt, 5-10 wt% of ethylene-propylene rubber, and the like. Butyl rubber, 6-29 wt% plasticizer, 4-16 wt% tackifier, 5-42 wt% filler, 0.2-3 wt% oxidation and antioxidant, 2- A buffer layer composed of 8 wt% phenolic resin;
A buffer synthetic rubber, 5-22% by weight of a synthetic rubber, 6-28% by weight of a plasticizer and a softener, 6-30% by weight of a tackifier, 4-35% by weight of a tackifier, % Of filler, 1-3 wt% of flow inhibitor, 1-5 wt% of accelerator, 0.2-2 wt% of oxidation and anti-aging agent. 3. The method according to claim 1 or 2,
Characterized in that the regenerated EPDM (Ethylene, Propylene, Non-conjugated Diene) of the buffer layer is a desulfurized regenerated EPDM powder. 3. The method according to claim 1 or 2,
Wherein the plasticizer of the adhesive waterproof layer is prepared by adding all plasticizers to a tank heated to 65 ° C to 80 ° C and then adding an accelerator.