KR102179061B1 - waterproofing asphalt composition modified polymer, Self-adhesive waterproofing sheet containing the same, and asphalt waterproofing sheet construction using the same - Google Patents

Abstract

The present invention relates to: a waterproof polymer-modified asphalt composition capable of preventing a decrease in adhesion and waterproofness due to low thermal properties and low-temperature flexibility of a conventional self-adhesive asphalt waterproofing sheet; a self-adhesive asphalt waterproof sheet manufactured by using the same; and a construction method of an asphalt waterproof sheet using the same. The waterproof polymer-modified asphalt composition includes 5 to 20 wt% of a softener, 20 to 40 wt% of a filler, 1 to 8 wt% of a tackifier, 1 to 10 wt% of a modifier, and the remaining amount of asphalt.

Description

Waterproofing asphalt composition modified polymer, Self-adhesive waterproofing sheet containing the same, and asphalt waterproofing sheet construction using the same}

The present invention relates to a polymer-modified asphalt composition with improved physical properties such as adhesion and waterproof properties, a self-adhesive asphalt waterproof sheet prepared using the same, and an asphalt shingle construction method using the same.

In general, waterproofing methods are largely divided into coating waterproofing and waterproofing sheets according to the type of material constituting the waterproofing layer.

The above coating waterproofing is a method of making a waterproof coating by applying a synthetic resin material on the basis of the emulsion type coating waterproofing in which a liquid waterproofing agent is applied as it is, a solvent type coating waterproofing that is applied to concrete after dissolving the waterproofing agent in a volatile solvent to make a liquid state, epoxy resin There is an epoxy coating waterproofing that makes a waterproof layer by applying.

Such a coating waterproofing method has a problem that it takes a relatively long time to cure the waterproof layer by applying a liquid waterproofing material several times, and there is a problem that the waterproof layer is not formed to have a uniform thickness, and due to such a problem, a relatively thin waterproof layer There is a problem in that the waterproof ability is lowered. In addition, there is a problem that the swelling phenomenon occurs due to water vapor pressure.

The waterproof sheet is a waterproofing method in which the waterproof sheet is attached to the base surface using heat fusion or adhesive, and the product has already been standardized, so that the thickness of the waterproof layer is uniformly formed and the construction is quick. However, such a waterproof sheet has excellent waterproof performance due to the characteristics of the raw material itself, but the initial adhesive strength, temperature sensitivity, etc. are weak, so that a torch must be used due to low adhesion performance at low temperatures, and the waterproof sheet has a disadvantage.

As such, the waterproof sheet applied to the roof waterproofing, etc., must have excellent resistance to weather or climate change and adhesion to the structure as well as the waterproof function to extend the life of the structure. It is susceptible to aging due to change and has high flow due to the slope of the roof and solar heat, so asphalt to compensate for this should be applied.

Asphalt is limited in its use due to the problem of plastic deformation at high temperature and cracking at low temperature. In order to improve this problem, various polymers have been added to improve physical properties.

To this end, techniques for increasing the content of a modifier in asphalt or mixing it with additives such as tackifier and heat-resistant antioxidant have been proposed, but the existing asphalt for waterproofing sheet has a problem that is not effective due to lack of such physical properties.

Korea Registration No. 10-2031132 (2019.10.11.)

The present invention reduces adhesion and waterproofness caused by cracks in low-adhesion areas caused by the low thermal stability of the existing self-adhesive waterproof sheet used in the construction of asphalt shingles installed on roof structures such as apartment houses, apartments, and buildings. It is an object of the present invention to provide a waterproof polymer-modified asphalt composition capable of minimizing or preventing, and a self-adhesive waterproof sheet manufactured using the same, and an asphalt waterproof sheet construction method using the same.

The present invention for achieving the above object relates to a waterproof polymer-modified asphalt composition, comprising asphalt, a softener, a filler, a tackifier and a modifier, the modifier (C1 ~ C5 straight-chain alkyl) acrylate (acrylate) , Aryl methacrylate, (C6 ~ C10 pulverized alkyl) acrylate, acrylonitrile, (C1 ~ C5 alkyl) methacrylate and a mixture of acrylic acid (acrylic acid) emulsion copolymerization It contains an acrylic copolymer.

In addition, the present invention relates to a self-adhesive asphalt waterproof sheet, comprising a substrate and an adhesive layer formed on one surface of the substrate, wherein the adhesive layer includes the waterproof polymer-modified asphalt composition.

In addition, the present invention relates to an asphalt waterproof sheet construction method using the self-adhesive asphalt waterproof sheet.

Self-adhesive asphalt waterproof sheet manufactured by applying the waterproofing polymer-modified asphalt composition of the present invention as an adhesive layer (or adhesive layer) can not only have high tensile strength, tear strength, and elongation, but also have high adhesion strength, The composition has excellent thermal flow-down properties and low-temperature flexibility, and has high thermal stability, so that a decrease in adhesion and waterproofness can be minimized or prevented. Such, by using the self-adhesive asphalt waterproof sheet of the present invention can be applied to the waterproof construction of the roof of a concrete structure, such as bridges.

Hereinafter, the present invention will be described in more detail.

The waterproof polymer-modified asphalt composition of the present invention includes asphalt, a softener, a filler, a tackifier, and a modifier.

As the asphalt, general asphalt used in the art related to waterproof construction may be used, and at least one selected from straight asphalt, cutback asphalt, goose asphalt, blown asphalt, emulsified asphalt and sebum (PG) grade asphalt may be used, More preferably, it is good to use asphalt having a penetration of 80 to 100 dmm and a softening point of 42 to 50°C. In addition, the content of asphalt is the remaining amount of the total weight of the composition excluding the remaining compositions other than the softener, filler, tackifier and modifier.

In the composition of the present invention, the emollient serves to improve raw material miscibility and flexibility of the composition, and contains at least one selected from paraffinic oil, naphthenic oil, and aromatic oil. It may include, and preferably TDAE (Treated Distillate aromatic extract) oil may be included. In addition, the content of the softener may include 5 to 20% by weight, preferably 7 to 15% by weight, and more preferably 8.5 to 12.5% by weight of the total weight of the composition. At this time, if the content of the softener is less than 5% by weight, there may be a problem that the miscibility between the compositions is poor, and if it is used in excess of 20% by weight, there may be a problem that the thermal flow-down property of the waterproof sheet is rather poor due to excessive use. Good to use within.

In the composition of the present invention, the filler is to improve mechanical properties such as dimensional stability and abrasion resistance, and at least one selected from calcium carbonate, barium sulfate, talc, blast furnace slag, fly ash, rubber chips, silica, carbon black and fibrous fillers It may include. In addition, the fibrous filler may include at least one selected from PP (polypropylene) short fibers, PE (polyethylene) short fibers, and glass paper. The content of the filler is preferably 20 to 40% by weight, preferably 22 to 38% by weight, more preferably 27.5 to 35.0% by weight of the total weight of the composition.If the content of the filler is less than 20% by weight, the waterproof sheet is sufficient. It may not be possible to secure mechanical properties, and if it is used in excess of 40% by weight, the amount of use is too high, so the amount of asphalt in the waterproof sheet decreases, and there may be a problem that the waterproofness and adhesion strength are reduced. It is good.

In the composition of the present invention, the tackifier serves to improve the adhesiveness of the self-adhesive waterproof sheet to concrete structures, and the like, polybutene, polyvinyl butyral, polytelpene, dicycloventadiene resin, It may contain at least one selected from hydroxy ethyl acryloyl phosphate, hydroxy ethyl methacrylate phosphate and a silane-based tackifier, and preferably polybutene, polyvinyl butyral, polytelpene, It may include at least one selected from dicycloventadiene resins and silane-based tackifiers, and more preferably, at least one selected from polybutene, polyvinylbutyral, and silane-based tackifiers. . And, the content of the tackifier may include 1 to 8% by weight, preferably 2.5 to 8.0% by weight, more preferably 3.5 to 7.0% by weight of the total weight of the composition, in which case, the tackifier content is 1 If it is less than wt%, it may not be possible to secure sufficient adhesion strength of the waterproof sheet, and if it is used in excess of 8 wt%, the viscosity of the composition is too high when the adhesive layer is formed on the waterproof sheet, resulting in poor coating properties and moldability. Since there may be a problem of lowering the low-temperature flexibility, it is recommended to use it within the above range.

In the composition of the present invention, the modifier serves to improve the long-term adhesion stability and long-term waterproofness of the waterproof sheet by improving the physical properties such as thermal runoff and low-temperature bending properties of the waterproof asphalt composition of the present invention, and the content of the modifier is the composition 1 to 10% by weight, preferably 2 to 8.5% by weight, more preferably 3.5 to 7.0% by weight of the total weight may be used. At this time, if the content of the modifier is less than 1% by weight, the amount of the modifier may not be effective, and if the content of the modifier exceeds 10% by weight, the effect of improving the thermal flow down property of the self-adhesive waterproof sheet is insufficient. Since there may be a problem in that the low-temperature bendability of 20° C. is bad and the adhesion strength is rather reduced, it is recommended to use it within the above range.

The modifier includes an acrylic copolymer obtained by emulsion copolymerization of a mixture of specific monomers, and specifically, the mixture of specific monomers is (C1-C5 straight-chain alkyl) acrylate, aryl methacrylate , (C6 ~ C10 pulverized alkyl) acrylate, acrylonitrile, (C1 ~ C5 alkyl) methacrylate and acrylic acid (acrylic acid), preferably (C1 ~ C5 straight-chain alkyl ) Based on 100 parts by weight of acrylate, 0.1 to 2 parts by weight of aryl methacrylate, (C6 to C10 pulverized alkyl) 8 to 20 parts by weight of acrylate, 2 to 8.5 parts by weight of acrylonitrile, (C1 to C5 Alkyl) 1 to 10 parts by weight of methacrylate and 0.5 to 2.0 parts by weight of acrylic acid, more preferably (C1 to C5 linear alkyl) based on 100 parts by weight of acrylate, aryl methacrylate 0.50 to 1.50 Parts by weight, (C6 ~ C10 pulverized alkyl) acrylate 9.0 ~ 17.0 parts by weight, acrylonitrile 4.0 ~ 7.5 parts by weight, (C1 ~ C5 alkyl) methacrylate 3.0 ~ 8.0 parts by weight, and acrylic acid 0.5 ~ It may contain 1.2 parts by weight. At this time, if the amount of (C6 ~ C10 pulverized alkyl) acrylate is less than 8 parts by weight, there may be a problem in that the thermal flow-down improvement effect of the waterproof sheet in which the synthesized copolymer is introduced as a modifier is insufficient, and exceeds 20 parts by weight. If it does, it is better to use it within the above range because there may be a problem that the adhesive strength of the waterproof sheet is lowered.

In addition to the above-described asphalt, softener, filler, tackifier and modifier, the composition of the present invention is wetted within a range that does not reduce physical properties such as waterproofness, adhesion strength, and thermal runoff of the self-adhesive waterproof sheet of the present invention to be manufactured. It may further include one or more additives selected from a pressure-sensitive adhesive, a UV stabilizer, an antioxidant, a plasticizer, a crosslinking agent, a curing agent and a peeling inhibitor.

Among the additive components, the wet adhesive is related to the synthesis of an adhesive that can exhibit adhesiveness on an alkaline concrete surface containing a large number of moisture, and an alkaline concrete surface containing a large number of moisture by imparting a functional group capable of reacting to moisture by the adhesive. It relates to the synthesis of an adhesive that can improve the adhesiveness in the adhesive. Conjugated Diene Monomer is used among the synthetic composition of the adhesive, and the structure of the polymer forms a network structure so that the adhesive does not flow down or behave due to heat in summer. I did it. For example, a preferred embodiment of the wetting adhesive, polyhydric alcohol 0.250 ~ 0.310 mol, acid component 0.40 ~ 0.60 mol, polyalkylene glycol 0.0050 ~ 0.0065 mol, conjugated diene acid (Conjugated Diene acid) 0.100 ~ 0.150 mol After adding and mixing, concentrated sulfuric acid 50 ~ 150 ppm, BHT (2,6-Di-tert-butyl-4-methylphenol) 350 ~ 420 ppm, and THQ (Methylhydroquinone) 100 ~ 200 ppm are added in sequence to attach the capacitor. Nitrogen was purged in the four-necked flask and reacted for about 20 hours to about 200 ~ 210℃, and the reaction was terminated at an acid value of 10m gKOH/g or less. Next, the reaction was lowered to 50°C, and 0.0550 to 0.0620 mol of acrylic acid was added, 150 to 250 ppm of MHO (6-methyl-5-hepten-2-one) and 150 to 250 ppm of THQ (Methylhydroquinone) were added to 160 The reaction is terminated at 9 mgKOH/g with an acid value of 9 mgKOH/g by reacting within °C for 4 to 6 hours to synthesize a pressure-sensitive adhesive polyester acrylic oligomer. The sulfuric acid catalyst is removed using an exchange resin used in the pressure-sensitive adhesive polyester acrylic oligomer reacted in this way, and 30% by weight is added to the ketone and ethyl acetate solvent, and 1% by weight of BPO is added to 4-8 at around 100℃. What obtained by terminating the reaction by time polymerization can be used.

The polyhydric alcohol may contain at least one selected from glycerol, sorbitol, erythritol, and mannitol, and the acid component is oxalic acid, malonic It may contain at least one selected from among acid (Malonic Acid), adipic acid (Adipic Acid), and fumanic acid (Fumanic Acid). And, the polyalkylene glycol may include one or more selected from polyethylene glycol (polyethylen glycol) and polypropylene glycol (polypropylene glycol), the conjugated diene acid is hexa-2,4-dienedio It may include Hexa-2,4-dienedioic Acid.

Among the additive components, the UV stabilizer may include at least one selected from hydroxybenzophenone resin, benzotriazole resin, non-yellowing polyurea resin, and acrylic polyol resin.

Among the additive components, the antioxidant serves to prevent oxidation of the asphalt composition, and may include at least one selected from phenolic antioxidants, monophenolic, bisphenolic, high molecular phenolic antioxidants, and amine antioxidants. have.

Among the additive components, the crosslinking agent serves to improve durability by filling the pores of the asphalt to prevent moisture penetration, and may include a copolymer of acrylic acid and sodium acrylate.

Among the additive components, the plasticizer is 1 selected from DiOctyl Phthalate (DOP), DiButyl Phthalate (DBP), DiOctyl Adipate (DOA), DiHeptyl Phthalate (DHP), DiIsoDecyl Phthalate (DIDP), and DiTriDecyl Phthalate (DTDP), Calcium Phosphate (TCP). It may contain more than one species.

Among the additive components, the curing agent may include at least one selected from 4.4-diphenylmethane diisocyanate (MDI), hexamethylenetetramine, amines, and polyamides.

Among the additive components, the peeling inhibitor is a polyphosphoric acid peeling inhibitor having a specific gravity of 1.0 or more and a viscosity of 110 cPs at 60°C; And at least one selected from amine-based peeling inhibitors having an acid value of 10 mgKOH/g or less and a total amine value of 140 to 400 mgHCl/g.

The self-adhesive asphalt waterproof sheet of the present invention includes a substrate and an adhesive layer formed on one surface of the substrate, and the adhesive layer is formed of the aforementioned waterproof polymer-modified asphalt composition.

The substrate may be a general substrate used in the art, for example, the substrate may be a woven fabric, a non-woven fabric, a polyvinyl chloride film, a polyethylene terephthalate film, a polypropylene film, an ethylene film, a high density polyethylene film and a low density polyethylene film. It may include one or more selected from among.

Self-adhesive asphalt waterproof sheet of the present invention, when measured according to KS F 3211-2015, has an adhesion strength of 2.5 N/mm ² or more, preferably 2.9 to 4.0 N/mm ² , more preferably 3.0 to 3.7 N/ May be mm ² .

In addition, the self-adhesive asphalt waterproof sheet of the present invention may be 5 mm or less, preferably 4.0 mm or less, and more preferably 1.0 to 3.5 mm at 72° C., when measuring the thermal runoff resistance. And, it may be 10 mm or less, preferably 9.5 mm or less, more preferably 6.0 to 9.5 mm at 90°C. In addition, it may be 35 mm or less at 100° C., preferably 22.0 to 34.5 mm, more preferably 25.0 to 34.5 mm.

In addition, the self-adhesive asphalt waterproofing sheet of the present invention may have excellent low-temperature flexibility at -15°C and -20°C when evaluating low-temperature flexural properties according to KS M 5000.

In addition, the self-adhesive asphalt waterproof sheet of the present invention, when measured according to the KS F 4917 method, when the thickness of the adhesive layer is 2 mm, tensile strength 7.0 to 11.0 N/mm, tear strength 9.0 to 12.5 N, and elongation 320 % Or more, preferably tensile strength 7.2 to 10.5 N/mm, tear strength 9.5 to 12.0 N and elongation 330% to 380%, more preferably tensile strength 7.3 to 10.0 N/mm, tear strength 10.0 to 12.0 N and elongation of 335% ~ 370% can be satisfied.

These, using the self-adhesive asphalt waterproof sheet of the present invention, can be applied to waterproof construction of a concrete structure, such as a roof of a building, bridge, etc., can be carried out by a general self-adhesive asphalt winkle sheet construction method. The construction surface may be a crete base surface, a water resistant plywood base surface, a sandwich panel base surface, and other roof base surfaces. For example, the roof construction is prepared by cleaning the surface to be constructed and/or repairing cracks. Next, grasp a reference point that meets the standard of the product and do the ink line. Next, if the construction is done from the end of the eaves, the first sheet to be attached is attached so that the end of the eaves is not visible, and is attached along the bottom surface of the eaves, but by holding the edge of the eaves. Next, from the two layers, the self-adhesive asphalt waterproof sheet (hereinafter referred to as "shingle sheet") is overlapped by 10 cm, and the second shingle sheet is attached to the top while attaching it to the ink line. Next, attach the shingle sheets to both roof surfaces in the same way to the vicinity of the dragon head, and then fold them to one side near the dragon head to overlap the remaining surfaces of the shingle sheets. Next, spread the complete shingle sheet over the shingle sheet that is superimposed on the roof yonghead and place it in the center of the yongmeori and overlap it over the existing shingle sheet. At this time, if there is a wall or a sculpture of the roof, it may be constructed in the same way so that the shingle sheet flashing covers the sculpture.

Hereinafter, the present invention will be described in more detail through examples, but the following examples do not limit the scope of the present invention, which should be interpreted to aid understanding of the present invention.

[Example]

Preparation Examples 1 to 3 and Comparative Preparation Examples 1 to 2: Preparation of a modifier

100 parts by weight of butyl acrylate, aryl methacrylate, 2-ethylhexyl acrylate, acrylonitrile, methyl methacrylate, and acrylic acid were emulsion-copolymerized to obtain an acrylic copolymer, followed by freeze drying. Water was removed to remove the finely divided solid-state modifier, and Preparation Examples 1 to 3 and Comparative Preparation Examples 1 to 2 were carried out, respectively. At this time, the composition ratio of the mixture is shown in Table 1 below.

Category (part by weight) Preparation Example 1 Preparation Example 2 Preparation Example 3 compare
Preparation Example 1 compare
Preparation Example 2 Butyl Acrylate ⁽¹⁾ 100 100 100 100 100 Aryl methacrylate 0.63 1.15 1.00 0.63 0.63 2-ethylhexylacrylate ⁽²⁾ 12.50 9.00 16.50 6.80 21.00 Acrylonitrile 6.25 7.60 5.25 6.25 6.25 Methyl methacrylate ⁽³⁾ 5.0 7.0 4.0 5.0 5.0 Acrylic acid 0.63 0.85 0.75 0.63 0.63 (1): (C1 ~ C5 straight-chain alkyl) acrylate
(2): (C6 ~ C10 pulverized alkyl) acrylate
(3): (C1 ~ C5 alkyl) methacrylate

Example 1: Preparation of waterproof polymer modified asphalt composition

Aromatic oil as a softener (TDAE (Treated Distillate aromatic extract) oil) 10% by weight, 30% by weight of calcium carbonate as a filler, 5% by weight of polybutene as a tackifier, 5% by weight of the modifier of Preparation Example 1, and the remaining amount of asphalt ( After adding SK Innovation's AP-3, penetration of 80 dmm, softening point 45.7°C) into a blender, mixing for 2 hours while maintaining a stirring temperature of 180°C and a stirring speed of 1,200 ~ 1,300 rpm to prepare a waterproof polymer modified asphalt composition I did.

Examples 2 to 3 and Comparative Examples 1 to 2

To prepare a waterproofing polymer-modified asphalt composition with the same composition and composition ratio as in Example 1, but using the modifiers of Preparation Examples 2 to 3 or Comparative Preparation 1 instead of the modifier of Preparation Example 1 as a modifier, each of the polymer-modified asphalt compositions for waterproofing Prepared and carried out Examples 2 to 3 and Comparative Examples 1 to 2, respectively.

Examples 4 to 5 and Comparative Examples 3 to 4

To prepare a waterproof polymer-modified asphalt composition with the same composition and composition ratio as in Example 1, but by varying the amount of the modifier used in Preparation Example 1 to prepare a waterproof polymer-modified asphalt composition, respectively, Examples 4 to 5 and Comparative Examples 3 to 4 were respectively Implemented. At this time, Comparative Example 3 was a modifier, and instead of the modifier of Preparation Example 1, a styrene-butadiene-styrene (SBS) rubber resin was used as the modifier.

division
(weight%) Softener Filler cohesion
Granting system Modifier asphalt Example 1 10 30 5 5 (Preparation Example 1) Remaining balance Example 2 10 30 5 5 (Preparation Example 2) Remaining balance Example 3 10 30 5 5 (Preparation Example 3) Remaining balance Example 4 10 30 5 2 (Preparation Example 1) Remaining balance Example 5 10 30 5 8.5 (Preparation Example 1) Remaining balance Comparative Example 1 10 30 5 5 (Comparative Preparation Example 1) Remaining balance Comparative Example 2 10 30 5 5 (Comparative Preparation Example 2) Remaining balance Comparative Example 3 10 30 5 5 (SBS) Remaining balance Comparative Example 4 10 30 5 11 (Preparation Example 1) Remaining balance

Experimental Example 1: Measurement of physical properties of a waterproof sheet 1

In order to measure the physical properties of the compositions of Examples and Comparative Examples, a 2 mm thick adhesive layer was formed and cured on one side of a polyvinyl chlorite (PVC) film (thickness 1 mm), which is a base material of the waterproof polymer-modified asphalt composition. Was prepared. And, the physical properties of the prepared waterproof sheet were measured in the following manner, and the results are shown in Table 3 below.

(1) Heat flow (72℃, 90℃, 100℃): A waterproof sheet specimen of 5cm in width and 5cm in length is attached to a suspension plate (steel use stainless plate) inclined at 90°. After that, after leaving it to stand in an oven at a specific temperature for 1 hour, the length flowing down from the initial position was measured.

(2) Cold bending temperature (-15℃, -20℃): According to KS M 5000, a modified asphalt waterproof sheet specimen of 5cm in width, 10cm in length, and 3mm in thickness was placed in a thermostat maintained at a low temperature. After allowing to stand for a period of time, the center of the specimen was bent 180˚ in a U-shape using a low-temperature bending machine, and it was checked whether residual cracks or cracks occurred.

(3) The adhesion strength (N/mm ² ) was measured by KS F 3211 (2015).

division Thermal flow down Low temperature bending performance Adhesion strength
(N/mm ² ) 72℃ 90℃ 100℃ -15℃ -20℃ Example 1 1.7 7.5 30.7 Good Good 3.1 Example 2 2.8 8.6 33.5 Good Good 3.3 Example 3 1.7 7.2 29.2 Good Good 3.0 Example 4 3.1 9.3 34.3 Good Good 3.3 Example 5 1.5 6.9 28.8 Good Good 3.2 Comparative Example 1 2.0 10.7 38.9 Good Good 3.4 Comparative Example 2 1.6 7.0 29.5 Good Good 2.6 Comparative Example 3 5.2 13.6 46.8 Good Cracking 2.0 Comparative Example 4 1.4 6.7 28.3 Good Cracking 2.8

Looking at the physical property measurement results in Table 3, Examples 1 to 5 showed excellent results in that the thermal flow-down measurement results were 5 mm or less at 72°C, 10 mm or less at 90°C, and 35 mm or less at 100°C, It also exhibited excellent flexural properties and an adhesion strength of 2.5 N/mm ² or more. And, comparing Examples 1 to 3, when synthesizing the copolymer of the modifier, when the amount of (C6 to C10 pulverized alkyl) acrylate decreases, the adhesion strength increases but the thermal runoff property slightly decreases, As the amount of (C6 ~ C10 pulverized alkyl) acrylate increased, the adhesion strength decreased and the thermal runoff property slightly increased.

On the other hand, in the case of Comparative Example 1 in which a modifier (Comparative Preparation Example 1) was introduced, a copolymer synthesized using only 6.8 parts by weight of (C6 ~ C10 pulverized alkyl) acrylate amount of less than 8 parts by weight was introduced, Example 2 and In comparison, there is a problem in that the thermal runoff property is greatly reduced from a temperature of 90°C or higher. And, in the case of Comparative Example 2 in which a modifier (Comparative Preparation Example 2) synthesized using 21 parts by weight of (C6 ~ C10 pulverized alkyl) acrylate amount exceeded 20 parts by weight was introduced, when compared with Example 3, It was confirmed that there is a problem that the adhesion strength is greatly reduced.

In addition, in the case of Comparative Example 3 prepared using the SBS rubber resin, which is not the modifier of the present invention as a modifier component, as compared to Examples 1 to 5, the results of thermal flow down, low-temperature bone grain performance and adhesion strength were poor. I could see it.

In addition, in the case of Comparative Example 4 using 11% by weight in which the amount of the modifier used exceeded 10% by weight of the total weight of the composition, compared to Example 1 (5% by weight) and Example 5 (8.5% by weight), thermal flow down There was a problem in that the effect of increasing the property improvement was insufficient, the low-temperature bendability of -20℃ was not good, and the adhesion strength was rather decreased.

Experimental Example 2: Measurement of the physical properties of the waterproof sheet 2

In order to measure the physical properties of the compositions of Examples and Comparative Examples, a 2 mm thick adhesive layer was formed and cured on one side of a polyvinyl chlorite (PVC) film (thickness 1 mm), which is a base material of the waterproof polymer-modified asphalt composition. Were prepared respectively. And, the tensile strength, tear strength, and elongation of the manufactured waterproof sheet were measured according to the KS F 4917 method, and the results are shown in Table 4 below.

division Tensile strength (N/mm) Tear strength (N) Elongation (%) Example 1 8.0 11.0 350 Example 2 7.8 11.2 345 Example 3 8.1 10.5 362 Example 4 7.3 10.3 339 Example 5 8.3 11.8 365 Comparative Example 1 7.5 11.5 341 Comparative Example 2 8.2 9.7 366 Comparative Example 3 6.5 9.0 300 Comparative Example 4 8.3 11.7 360

Looking at the results of measuring the properties of the waterproof sheet in Table 4, it was confirmed that the waterproof sheets of Examples 1 to 5 had a tensile strength of 7.5 N/mm or more, a tear strength of 10.0 N or more, and an elongation of 320% or more. Could

However, in the case of Comparative Example 3 in which SBS rubber resin was used as a modifier, it showed a low overall mechanical property measurement result as compared to Examples 1 to 5.

In addition, in the case of Comparative Example 4 using 11% by weight in which the amount of the modifier exceeded 10% by weight of the total weight of the composition, compared to Example 5 (8.5% by weight), there was little effect of improving mechanical properties and rather the elongation was slightly reduced I did.

Claims (10)

5 to 20% by weight of a softener, 20 to 40% by weight of a filler, 1 to 8% by weight of a tackifier, 1 to 10% by weight of a modifier, and the remaining amount of asphalt,
The modifier includes an acrylic copolymer obtained by emulsion copolymerization of the mixture,
The mixture is based on 100 parts by weight of (C1 to C5 straight-chain alkyl) acrylate, 0.1 to 2 parts by weight of aryl methacrylate, (C6 to C10 pulverized alkyl) acrylate 8 to 20 parts by weight, acrylonite Reel 2 to 8.5 parts by weight, (C1 to C5 alkyl) methacrylate 1 to 10 parts by weight and 0.5 to 2.0 parts by weight of acrylic acid,
The emollient includes at least one selected from paraffinic oil, naphthenic oil, and aromatic oil,
The filler includes at least one selected from calcium carbonate, barium sulfate, talc, blast furnace slag, fly ash, rubber chips, silica, carbon black, and fibrous fillers,
The tackifier is selected from polybutene, polyvinyl butyral, polytelpene, dicycloventadiene resin, hydroxy ethyl acryloyl phosphate, hydroxy ethyl methacrylate phosphate, and silane tackifier. Waterproof polymer-modified asphalt composition comprising at least one kind. delete delete The polymer modified asphalt composition for waterproofing according to claim 1, wherein the fibrous filler comprises at least one selected from short PP fibers, short PE fibers, and glass paper. It includes a substrate and an adhesive layer formed on one side of the substrate,
The adhesive layer is self-adhesive asphalt waterproofing sheet, characterized in that it comprises the waterproofing polymer modified asphalt composition of claim 1 or 4. The method of claim 5, wherein the substrate comprises at least one selected from woven fabric, nonwoven fabric, polyvinyl chloride film, polyethylene terephthalate film, polypropylene film, ethylene film, high density polyethylene film, and low density polyethylene film. Removable asphalt waterproof sheet. The self-adhesive asphalt waterproofing sheet according to claim 5, wherein the adhesion strength is 2.9 ~ 4.0 N/mm ² when measured according to KS F 3211-2015. The self-adhesive asphalt waterproofing sheet according to claim 5, wherein when measuring the thermal runoff resistance, it is 5 mm or less at 72°C, 10 mm or less at 90°C, and 35 mm or less at 100°C. The self-adhesive asphalt waterproofing sheet according to claim 5, wherein when the thickness of the adhesive layer is 2 mm, a tensile strength of 7.0 to 11.0 N/mm, a tear strength of 9.0 to 12.5 N, and an elongation of 320% or more. The asphalt waterproofing sheet construction method using the self-adhesive asphalt waterproofing sheet of claim 5.