Strong-polarity poe modified asphalt, preparation method thereof and application of strong-polarity poe modified asphalt in waterproof coiled material

Abstract

The invention provides strong-polarity poe modified asphalt as well as a preparation method and application thereof in waterproof coiled materials, and belongs to the technical field of building waterproof materials. The modified asphalt is prepared from the following raw materials in parts by weight: 38-60 parts of asphalt, 3-5 parts of softening oil, 15-35 parts of high-polarity poe, 8-15 parts of modified rubber powder and 15-30 parts of talcum powder. The modified asphalt obtained by the invention has more excellent high and low temperature performance, more excellent weather resistance and stability, and higher joint peeling strength; the obtained high-polarity poe modified asphalt waterproof coiled material has high temperature resistance, low temperature resistance, weather resistance, joint peeling strength and storage stability.

Description

Technical Field

[0001] The invention relates to the field of building waterproof materials, and in particular to a highly polar PEO modified asphalt and a preparation method thereof and application thereof in waterproof coiled materials. Background Art

[0002] Asphalt was first used in roads. The use of polymers to modify asphalt can be traced back to the early 19th century in Britain. Foreign research on polymer-modified asphalt continued until the 1980s. The modifiers evolved from the earliest natural rubber to styrene-butadiene synthetic rubber (SBR), and then to thermoplastic resins (EVA, APP, PE). It was not until the 1980s that SBS modified asphalt was internationally recognized and widely used on heavy-load roads.

[0003] The research and production of waterproof asphalt modification usually draws on the road asphalt industry, focusing on the modification of asphalt by SBS. SBS elastomer modified asphalt waterproofing membrane was first introduced from Europe to China in the 1980s. After nearly 40 years of development, it has been widely used in waterproofing projects such as roofs and basements of industrial and civil buildings, as well as waterproofing and moisture-proofing of roof gardens, roads, bridges, tunnels, parking lots, swimming pools and other projects. However, although this waterproof product has been tested in engineering practice and recognized by the market, there are still many defects that need to be improved, such as insufficient lap bonding strength caused by construction and material quality problems, safety risks and air pollution caused by open flame construction, the inability to use open flame hot melt construction in underground confined spaces, and poor exposed weather resistance.

[0004] The defects of SBS, such as poor compatibility with asphalt and easy aging, have greatly restricted the performance improvement and engineering application of asphalt-based waterproof membranes. Therefore, how to improve the compatibility of modified materials with asphalt and improve the weathering and aging performance of asphalt is the key.

[0005] In view of the above problems, the present invention uses a strong polar PEO to fully modify the matrix asphalt to prepare a strong polar PEO modified asphalt waterproof membrane. This product inherits the mechanical properties of polyolefin PEO and can be hot-air welded, which fundamentally solves the safety and environmental protection problems caused by open flame construction. At the same time, the special molecular chain structure in the modified material also greatly improves the stability, weather resistance and bonding strength of the material. Summary of the invention

[0006] The purpose of the present invention is to provide a highly polar PEO modified asphalt and a preparation method thereof and an application thereof in waterproof roll materials. The modified asphalt obtained by the present invention has more excellent high and low temperature performance, more excellent weather resistance and stability, and higher joint peel strength; the obtained highly polar PEO modified asphalt waterproof roll material has more excellent high temperature, low temperature, weather resistance, joint peel strength, storage stability and other properties.

[0007] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0008] In a first aspect, the present invention provides a highly polar PEO modified asphalt, which is prepared from the following raw materials in parts by weight:

[0009] Asphalt 38-60 parts, softening oil 3-5 parts, strong polar poe 15-35 parts, modified rubber powder 8-15 parts, talcum powder 15-30 parts.

[0010] Preferably, the asphalt type is AH-70 or AH-90.

[0011] Further preferably, the parameters of the AH-70 are as follows:

[0012]

[0013] Further preferably, the parameters of the AH-90 are as follows:

[0014]

[0015] The flash point is measured by the open cup method; the needle penetration is obtained by testing 100g at 25°C for 5s, and the unit is 1 / 10mm; and the ductility is measured at 15°C.

[0016] Preferably, the softened oil is a base lubricating oil or cycloparaffinic oil having a pour point of less than -30°C and a flash point of greater than 230°C.

[0017] Preferably, the highly polar poe has a melt flow rate of 0.8-3.5 g / 10 min and a density of 0.86-0.95 g / cm 3 , a polymer generated by grafting reaction of maleic anhydride, a strong polar monomer, with a grafting rate of 1.5-3%, with polyolefin PEO. In the present invention, polyolefin PEO with stronger weather resistance is used to replace the traditional modifier SBS to modify the base asphalt, thereby effectively improving the defects of ordinary SBS elastomer modified asphalt waterproofing membrane, which has poor resistance to ultraviolet aging and oxidation due to the unsaturated bond structure of SBS; at the same time, maleic anhydride, a strong polar monomer, is used to graft with the modifier to introduce polar groups, fundamentally solving the defects of low stability and low adhesive peeling strength caused by different polarities and poor compatibility between the traditional modifier and the base asphalt.

[0018] Preferably, the modified rubber powder is a powdered rubber material with a mesh size of 40-70.

[0019] The modified rubber powder can be obtained by pulverizing waste rubber products.

[0020] Preferably, the mesh size of the talcum powder is 180-200 meshes.

[0021] In a second aspect, the present invention provides a method for preparing the modified asphalt, comprising the following steps:

[0022] (1) weighing the raw materials according to the weight parts;

[0023] (2) Heat the asphalt to 140-160°C, stir for 20 minutes, and stir at a rate of 500-800 r / min; after the stirring is completed, add the softened oil after heating and dehydration, raise the temperature to 160-165°C, stir for 30 minutes, and stir at a rate of 500-800 r / min; after the stirring is completed, add the strong polar PoE, raise the temperature to 180-190°C, stir for 1.5-2 hours, and stir at a rate of 1500-2000 r / min; after the stirring is completed, add the measured modified rubber powder, and stir at high speed for 1-1.5 hours; finally, add talcum powder, stir at low speed for 30 minutes, and stir at a rate of 500-800 r / min, and keep the temperature at 180-190°C to obtain the modified asphalt.

[0024] In a third aspect, the present invention provides the use of the modified asphalt obtained by the above preparation method in waterproof membranes.

[0025] In a fourth aspect, the present invention provides a highly polar PEO modified asphalt waterproofing membrane, comprising a base layer, the upper and lower parts of the base layer are coated with a coating layer, and the outermost part of the coating layer is covered with an isolation layer;

[0026] The tire base is a filament II type polyester tire base;

[0027] The coating layer is the modified asphalt obtained by the preparation method of claim 7;

[0028] The isolation layer is a polyethylene film isolation material.

[0029] In a fifth aspect, the present invention provides a method for preparing the above-mentioned highly polar PEO-modified asphalt waterproofing membrane, comprising the following steps:

[0030] S1. Immersion oil

[0031] Adjust the oiling roller spacing after checking the equipment and clearing debris;

[0032] Open the oil drain valve and put the modified asphalt into the dipping oil tank;

[0033] Control the temperature before the dipping oil tank at 175-185℃;

[0034] S2. Tire

[0035] Lift the filament II polyester tire base onto the tire base unfolding device, and lead it to the tire base laminating machine, tire base stopping machine, tire base drying machine, deviation adjustment device, and enter the dipping oil tank;

[0036] S3. Lamination

[0037] Check whether the laminating roller surface is clean;

[0038] Inject cooling water into the water tank until it reaches the overflow surface to ensure normal circulation of cooling water;

[0039] Place the polyethylene film on the laminating device and tighten the bolts at both ends to fix the PE film in the middle of the laminating device;

[0040] Lead one end of the polyethylene film onto the laminating roller and make the film surface flat;

[0041] S4. Cooling

[0042] Check the cooling water circulation status and measure the finished coil temperature;

[0043] S5. Rewinding and packaging

[0044] Use ZL-G-7-1000 fully automatic CNC winder for winding, set the winding length to 10m / roll, the winding / pulling speed ratio to 0.9, the winding speed to 2000 rpm, and after cutting and winding, enter the laminating machine for plastic packaging.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] (1) The modified asphalt obtained by the present invention has better high and low temperature performance; the polarity of the polar PoE is the same as that of the base asphalt, which greatly improves the compatibility, and the proportion of the modifier added can be increased from the traditional 3-5% to 15-35%, making the spatial network structure in the asphalt system more complete and firm, and reducing the high temperature sensitivity. At the same time, because the polar PoE molecular chain involved in the modification contains soft propylene side chains, the asphalt flexibility component is increased and the deformation ability is enhanced, so it has better low temperature crack resistance.

[0047] (2) The modified asphalt obtained by the present invention has better weather resistance and stability; the complete and firm spatial network structure can effectively prevent the transformation of light components such as saturated and aromatic components in asphalt into heavy components such as colloid and asphaltene, and delay aging. Compared with the traditional modifier SBS, the polar poe molecular chain has no unsaturated bonds, stable chemical properties, and is not prone to cracking, which makes the material have extremely significant stability and weather resistance.

[0048] (3) The modified asphalt obtained by the present invention has higher joint peel strength; the joint peel strength of the modified asphalt waterproofing membrane is mainly determined to a certain extent by the cohesion of the waterproof material asphalt coating itself. Although SBS can enhance the cohesion of the material, its modification mechanism of asphalt determines that its addition ratio is low, and the SBS-asphalt blending system is unstable. The high proportion of polar PEO modified asphalt geometrically increases the cohesion of the material itself. Polar PEO is also a thermoplastic material with thermal welding properties, which makes the material have higher joint peel strength.

[0049] (4) The highly polar PEO modified asphalt waterproofing membrane obtained by the present invention using the modified asphalt as the coating layer of the waterproofing membrane has excellent innovative improvements in physical properties such as high temperature, low temperature, weather resistance, joint peeling strength, and storage stability. It also has great advantages in construction methods and has certain economic and social benefits. DETAILED DESCRIPTION

[0050] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0051] It should be understood that the terms described in the present invention are only for describing special embodiments and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. Each smaller range between the intermediate value in any stated value or stated range and any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0052] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0053] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to those skilled in the art. The present application description and examples are exemplary only.

[0054] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0055] The "room temperature" and "normal temperature" mentioned in the present invention are all calculated as 25±2°C unless otherwise specified.

[0056] The raw materials used in the following examples of the present invention are commercially available unless otherwise specified.

[0057] The stirring rate is 500-800r / min for low-speed stirring; the stirring rate is 1500-2000r / min for high-speed stirring; the product performance is not affected within the above range, so the low-speed stirring rate in the following embodiments is 650r / min; the high-speed stirring rate is 1800r / min.

[0058] Example 1

[0059] (1) Weigh the raw materials:

[0060]

[0061] Description of the raw materials used:

[0062] The parameters of the AH-70 are as follows:

[0063]

[0064] Softened oil is a cycloparaffinic oil with a pour point less than -30°C and a flash point greater than 230°C.

[0065] Strong polarity poe is melt flow rate 2.3g / 10min, density 0.88g / cm 3 , a polymer generated by the grafting reaction of maleic anhydride, a strong polar monomer with a grafting rate of 2.1%, and polyolefin poe.

[0066] The modified rubber powder is a powdered rubber material with a mesh size of 53.

[0067] The mesh number of the talcum powder is 195 meshes.

[0068] (2) Modified asphalt preparation method:

[0069] Heat the asphalt to 150℃, pump it into the primary batching tank, and stir at low speed for 20 minutes;

[0070] The softened oil after heating and dehydration was pumped into the primary reactor through a metering pump, the temperature was slowly raised to 163°C, and stirred at a low speed for 30 minutes; the metered strong polar PoE was added, the temperature was raised to 182°C, and stirred at a high speed for 1.8 hours to carry out modification;

[0071] Add the measured modified rubber powder and stir at high speed for 1.2 hours; use a colloid mill to move the developed asphalt coating material from the primary reactor to the secondary reactor, add talcum powder, stir at low speed for 30 minutes, and keep the temperature at 186°C.

[0072] (3) Preparation method of waterproof membrane

[0073] The waterproof roll material comprises a base layer, the upper and lower parts of the base layer are coated with a coating layer, and the outermost part of the coating layer is covered with an isolation layer;

[0074] The tire base is a filament II type polyester tire base;

[0075] The coating layer is modified asphalt;

[0076] The isolation layer is a polyethylene film isolation material.

[0077] The specific preparation method comprises the following steps:

[0078] S1. Immersion oil

[0079] Adjust the oiling roller spacing after checking the equipment and clearing debris;

[0080] Open the oil drain valve and put the modified asphalt into the dipping oil tank;

[0081] Control the temperature before the dipping oil tank at 180℃;

[0082] S2. Tire

[0083] Lift the filament II polyester tire base onto the tire base unfolding device, and lead it to the tire base laminating machine, tire base stopping machine, tire base drying machine, deviation adjustment device, and enter the dipping oil tank;

[0084] S3. Lamination

[0085] Check whether the laminating roller surface is clean;

[0086] Inject cooling water into the water tank until it reaches the overflow surface to ensure normal circulation of cooling water;

[0087] Place the polyethylene film on the laminating device and tighten the bolts at both ends to fix the PE film in the middle of the laminating device;

[0088] Lead one end of the polyethylene film onto the laminating roller and make the film surface flat;

[0089] S4. Cooling

[0090] Check the cooling water circulation status and measure the finished coil temperature;

[0091] S5. Rewinding and packaging

[0092] Use ZL-G-7-1000 fully automatic CNC winder for winding, set the winding length to 10m / roll, the winding / pulling speed ratio to 0.9, the winding speed to 2000 rpm, and after cutting and winding, enter the laminating machine for plastic packaging.

[0093] Example 2

[0094] (1) Weigh the raw materials:

[0095] Example 2

[0096]

[0097] Description of the raw materials used:

[0098] The parameters of the AH-90 are as follows:

[0099]

[0100] The softened oil is a base lubricating oil with a pour point lower than -30°C and a flash point higher than 230°C.

[0101] The strong polar poe has a melt flow rate of 0.8 g / 10 min and a density of 0.86 g / cm 3 , a polymer generated by the grafting reaction of maleic anhydride, a strong polar monomer with a grafting rate of 1.5%, and polyolefin PEO.

[0102] The modified rubber powder is a 40-mesh powdered rubber material.

[0103] The mesh number of the talcum powder is 180 meshes.

[0104] (2) Modified asphalt preparation method:

[0105] Heat the asphalt to 140℃, pump it into the primary batching tank, and stir at low speed for 20 minutes;

[0106] The softened oil after heating and dehydration is pumped into the primary reactor through a metering pump, the temperature is slowly raised to 160°C, and stirred at a low speed for 30 minutes;

[0107] Add the measured amount of highly polar PoE, raise the temperature to 180°C, and stir at high speed for 1.5 hours to carry out modification;

[0108] Add the measured modified rubber powder and stir at high speed for 1 hour;

[0109] Use a colloid mill to move the developed asphalt coating from the primary reactor to the secondary reactor, add talcum powder, stir at a low speed for 30 minutes, and keep the temperature at 180°C.

[0110] (4) Preparation method of waterproof membrane

[0111] The waterproof roll material comprises a base layer, the upper and lower parts of the base layer are coated with a coating layer, and the outermost part of the coating layer is covered with an isolation layer;

[0112] The tire base is a filament II type polyester tire base;

[0113] The coating layer is modified asphalt;

[0114] The isolation layer is a polyethylene film isolation material.

[0115] The specific preparation method comprises the following steps:

[0116] S1. Immersion oil

[0117] Adjust the oiling roller spacing after checking the equipment and clearing debris;

[0118] Open the oil drain valve and put the modified asphalt into the dipping oil tank;

[0119] Control the temperature before the dip coating tank at 175°C;

[0120] S2. Tire

[0121] Lift the filament II polyester tire base onto the tire base unfolding device, and lead it to the tire base laminating machine, tire base stopping machine, tire base drying machine, deviation adjustment device, and enter the dipping oil tank;

[0122] S3. Lamination

[0123] Check whether the laminating roller surface is clean;

[0124] Inject cooling water into the water tank until it reaches the overflow surface to ensure normal circulation of cooling water;

[0125] Place the polyethylene film on the laminating device and tighten the bolts at both ends to fix the PE film in the middle of the laminating device;

[0126] Lead one end of the polyethylene film onto the laminating roller and make the film surface flat;

[0127] S4. Cooling

[0128] Check the cooling water circulation status and measure the finished coil temperature;

[0129] S5. Rewinding and packaging

[0130] Use ZL-G-7-1000 fully automatic CNC winder for winding, set the winding length to 10m / roll, the winding / pulling speed ratio to 0.9, the winding speed to 2000 rpm, and after cutting and winding, enter the laminating machine for plastic packaging.

[0131] Example 3

[0132] (1) Weigh the raw materials:

[0133]

[0134] Description of the raw materials used:

[0135] The parameters of the AH-70 are as follows:

[0136]

[0137] The softened oil is a base lubricating oil or naphthenic oil with a pour point of less than -30°C and a flash point of greater than 230°C.

[0138] The strong polar poe has a melt flow rate of 3.5g / 10min and a density of 0.95g / cm 3 , a polymer generated by the grafting reaction of maleic anhydride, a strong polar monomer with a grafting rate of 3%, and polyolefin PEO.

[0139] The modified rubber powder is a powdered rubber material with a mesh size of 70.

[0140] The mesh number of the talcum powder is 200 meshes.

[0141] (2) Modified asphalt preparation method:

[0142] Heat the asphalt to 160℃, pump it into the primary batching tank, and stir at low speed for 20 minutes;

[0143] The softened oil after heating and dehydration is pumped into the primary reactor through a metering pump, the temperature is slowly raised to 165°C, and stirred at a low speed for 30 minutes;

[0144] Add the measured amount of highly polar PoE, raise the temperature to 190°C, and stir at high speed for 2 hours to carry out modification;

[0145] Add the measured modified rubber powder and stir at high speed for 1.5 hours;

[0146] Use a colloid mill to move the developed asphalt coating from the primary reactor to the secondary reactor, add talcum powder, stir at a low speed for 30 minutes, and keep the temperature at 190°C.

[0147] (5) Preparation method of waterproof membrane

[0148] The waterproof roll material comprises a base layer, the upper and lower parts of the base layer are coated with a coating layer, and the outermost part of the coating layer is covered with an isolation layer;

[0149] The tire base is a filament II type polyester tire base;

[0150] The coating layer is modified asphalt;

[0151] The isolation layer is a polyethylene film isolation material.

[0152] The specific preparation method comprises the following steps:

[0153] S1. Immersion oil

[0154] Adjust the oiling roller spacing after checking the equipment and clearing debris;

[0155] Open the oil drain valve and put the modified asphalt into the dipping oil tank;

[0156] Control the temperature before the dip coating tank at 185°C;

[0157] S2. Tire

[0158] Lift the filament II polyester tire base onto the tire base unfolding device, and lead it to the tire base laminating machine, tire base stopping machine, tire base drying machine, deviation adjustment device, and enter the dipping oil tank;

[0159] S3. Lamination

[0160] Check whether the laminating roller surface is clean;

[0161] Inject cooling water into the water tank until it reaches the overflow surface to ensure normal circulation of cooling water;

[0162] Place the polyethylene film on the laminating device and tighten the bolts at both ends to fix the PE film in the middle of the laminating device;

[0163] Lead one end of the polyethylene film onto the laminating roller and make the film surface flat;

[0164] S4. Cooling

[0165] Check the cooling water circulation status and measure the finished coil temperature;

[0166] S5. Rewinding and packaging

[0167] Use ZL-G-7-1000 fully automatic CNC winder for winding, set the winding length to 10m / roll, the winding / pulling speed ratio to 0.9, the winding speed to 2000 rpm, and after cutting and winding, enter the laminating machine for plastic packaging.

[0168] Example 4

[0169] (1) Weigh the raw materials:

[0170]

[0171]

[0172] Description of the raw materials used:

[0173] The parameters of the AH-90 are as follows:

[0174]

[0175] The softened oil is a base lubricating oil or naphthenic oil with a pour point of less than -30°C and a flash point of greater than 230°C.

[0176] The strong polar poe has a melt flow rate of 3.1 g / 10 min and a density of 0.91 g / cm 3 , a polymer generated by the grafting reaction of maleic anhydride, a strong polar monomer with a grafting rate of 2.2%, and polyolefin poe.

[0177] The modified rubber powder is a 60-mesh powdered rubber material.

[0178] The mesh number of the talcum powder is 190 meshes.

[0179] (2) Modified asphalt preparation method:

[0180] Heat the asphalt to 148°C, pump it into the primary batching tank, and stir at a low speed for 20 minutes;

[0181] The softened oil after heating and dehydration is pumped into the primary reactor through a metering pump, the temperature is slowly raised to 161°C, and stirred at a low speed for 30 minutes;

[0182] Add the measured amount of highly polar PoE, raise the temperature to 190°C, and stir at high speed for 2 hours to carry out modification;

[0183] Add the measured modified rubber powder and stir at high speed for 1.5 hours;

[0184] Use a colloid mill to move the developed asphalt coating from the primary reactor to the secondary reactor, add talcum powder, stir at a low speed for 30 minutes, and keep the temperature at 190°C.

[0185] (6) Preparation method of waterproof membrane

[0186] The waterproof roll material comprises a base layer, the upper and lower parts of the base layer are coated with a coating layer, and the outermost part of the coating layer is covered with an isolation layer;

[0187] The tire base is a filament II type polyester tire base;

[0188] The coating layer is modified asphalt;

[0189] The isolation layer is a polyethylene film isolation material.

[0190] The specific preparation method comprises the following steps:

[0191] S1. Immersion oil

[0192] Adjust the oiling roller spacing after checking the equipment and clearing debris;

[0193] Open the oil drain valve and put the modified asphalt into the dipping oil tank;

[0194] Control the temperature before the dip coating tank at 185°C;

[0195] S2. Tire

[0196] Lift the filament II polyester tire base onto the tire base unfolding device, and lead it to the tire base laminating machine, tire base stopping machine, tire base drying machine, deviation adjustment device, and enter the dipping oil tank;

[0197] S3. Lamination

[0198] Check whether the laminating roller surface is clean;

[0199] Inject cooling water into the water tank until it reaches the overflow surface to ensure normal circulation of cooling water;

[0200] Place the polyethylene film on the laminating device and tighten the bolts at both ends to fix the PE film in the middle of the laminating device;

[0201] Lead one end of the polyethylene film onto the laminating roller and make the film surface flat;

[0202] S4. Cooling

[0203] Check the cooling water circulation status and measure the finished coil temperature;

[0204] S5. Rewinding and packaging

[0205] Use ZL-G-7-1000 fully automatic CNC winder for winding, set the winding length to 10m / roll, the winding / pulling speed ratio to 0.9, the winding speed to 2000 rpm, and after cutting and winding, enter the laminating machine for plastic packaging.

[0206] The highly polar PEO modified asphalt waterproofing membrane obtained in Examples 1-4 was tested according to the PY-II product standard of GB 18242-2008 "Elastomer modified asphalt waterproofing membrane", and the physical and mechanical performance indicators are shown in the following table:

[0207]

[0208]

[0209]

[0210]

[0211] In Examples 1-4, as the proportion of highly polar PoE gradually increases, the corresponding detection indicators also increase linearly, and the detection data characterize the positive role of highly polar PoE in the material.

[0212] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A highly polar PEO modified asphalt, characterized in that: Prepared from the following raw materials in parts by weight: Asphalt 38-60 parts, softening oil 3-5 parts, strong polar poe 15-35 parts, modified rubber powder 8-15 parts, talcum powder 15-30 parts.

2. The modified asphalt according to claim 1, characterized in that The asphalt model is AH-70 or AH-90.

3. The modified asphalt according to claim 1, characterized in that The softened oil is a base lubricating oil or naphthenic oil with a pour point of less than -30°C and a flash point of greater than 230°C.

4. The modified asphalt according to claim 1, characterized in that The strong polar poe has a melt flow rate of 0.8-3.5 g / 10 min and a density of 0.86-0.95 g / cm 3 , a polymer generated by grafting maleic anhydride, a strongly polar monomer with a grafting rate of 1.5-3%, with polyolefin PEO.

5. The modified asphalt according to claim 1, characterized in that: The modified rubber powder is a powdered rubber material with a mesh size of 40-70.

6. The modified asphalt according to claim 1, characterized in that: The mesh number of the talcum powder is 180-200 meshes.

7. The method for preparing modified asphalt according to any one of claims 1 to 6, characterized in that: The following steps are involved: (1) weighing the raw materials according to the weight parts; (2) Heat the asphalt to 140-160°C, stir for 20 minutes, and stir at a rate of 500-800 r / min; after the stirring is completed, add the softened oil after heating and dehydration, raise the temperature to 160-165°C, stir for 30 minutes, and stir at a rate of 500-800 r / min; after the stirring is completed, add the strong polar PoE, raise the temperature to 180-190°C, stir for 1.5-2 hours, and stir at a rate of 1500-2000 r / min; after the stirring is completed, add the measured modified rubber powder, and stir at high speed for 1-1.5 hours; finally, add talcum powder, stir at low speed for 30 minutes, and stir at a rate of 500-800 r / min, and keep the temperature at 180-190°C to obtain the modified asphalt.

8. Use of the modified asphalt obtained by the preparation method according to claim 7 in waterproofing membranes.

9. A highly polar poe modified asphalt waterproofing membrane, characterized in that: It comprises a tire base layer, the upper and lower parts of which are coated with a coating layer, and the outermost part of the coating layer is covered with an isolation layer; The tire base is a filament II type polyester tire base; The coating layer is the modified asphalt obtained by the preparation method of claim 7; The isolation layer is a polyethylene film isolation material.

10. The method for preparing the highly polar PEO modified asphalt waterproofing membrane according to claim 9, characterized in that: The following steps are involved: S1. Immersion oil Adjust the oiling roller spacing after checking the equipment and clearing debris; Open the oil drain valve and put the modified asphalt into the dipping oil tank; Control the temperature before the dipping oil tank at 175-185℃; S2. Tire Lift the filament II polyester tire base onto the tire base unfolding device, and lead it to the tire base laminating machine, tire base stopping machine, tire base drying machine, deviation adjustment device, and enter the dipping oil tank; S3. Lamination Check whether the laminating roller surface is clean; Inject cooling water into the water tank until it reaches the overflow surface to ensure normal circulation of cooling water; Place the polyethylene film on the laminating device and tighten the bolts at both ends to fix the PE film in the middle of the laminating device; Lead one end of the polyethylene film onto the laminating roller and make the film surface flat; S4. Cooling Check the cooling water circulation status and measure the finished coil temperature; S5. Rewinding and packaging Use ZL-G-7-1000 fully automatic CNC winder for winding, set the winding length to 10m / roll, the winding / pulling speed ratio to 0.9, the winding speed to 2000 rpm, and after cutting and winding, enter the laminating machine for plastic packaging.

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