Composition for rubber-coated asphalt waterproof coiled material, rubber-coated asphalt waterproof coiled material as well as preparation method and application of rubber-coated asphalt waterproof coiled material

Abstract

The invention relates to the technical field of building materials, and discloses a composition for a rubber-coated asphalt waterproof coiled material, the rubber-coated asphalt waterproof coiled material as well as a preparation method and application of the rubber-coated asphalt waterproof coiled material. The composition contains a rubber composition A and activated rubber particles, the use amount of the activated rubber particles is 0.5-0.8 kg / m < 2 >; the sizing material composition A contains matrix asphalt I, aromatic hydrocarbon oil, an SBS / SIS composite modifier, a tackifier and an interfacial compatibilizer. The rubber-coated asphalt waterproof coiled material provided by the invention has the advantages of high bonding strength, excellent sound insulation, heat insulation and weather resistance, and also helps to realize efficient and high-valued cyclic utilization of waste rubber resources in the field of building waterproof materials.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, specifically to a composition for rubber-coated bitumen waterproof membrane, the rubber-coated bitumen waterproof membrane, its preparation method, and its application. Background Technology

[0002] Traditional bitumen waterproofing membranes (such as SBS modified bitumen waterproofing membranes) typically have a layer of shale flakes or colored mineral sand (quartz sand) as a topcoat on the bitumen coating. Its main function is to prevent the membrane from sticking together during production, storage, and transportation, and to increase surface roughness. In application, this mineral topcoat layer bonds to the bitumen primarily through physical adsorption and simple mechanical interlocking.

[0003] In recent years, in an effort to improve environmental friendliness, some technologies have attempted to directly spread waste rubber granules (such as EPDM rubber or tire granules) onto the surface of asphalt rolls to replace part of the mineral coating. However, this is usually just a simple physical replacement without any modification treatment to the surface of the rubber granules.

[0004] The existing technology has the following main drawbacks: Poor adhesion: Traditional shale / quartz sand has weak adhesion to asphalt and is prone to detachment under long-term environmental conditions (such as thermal expansion and contraction, freeze-thaw cycles, and wind uplift). Recycled rubber granules used directly have even worse compatibility and adhesion with asphalt due to their chemically inert surface, making them extremely easy to peel off from the surface of the roll material.

[0005] Limited functionality: Traditional cladding layers mainly serve as insulation and decoration, lacking or having only minor additional functions (such as sound insulation and heat insulation), and cannot meet the needs of building energy conservation and improved comfort.

[0006] Resource consumption and environmental problems: The mining of shale and quartz sand consumes natural resources. If waste rubber is not effectively utilized for high-value purposes, it will cause "black pollution".

[0007] Unstable performance of recycled materials: If recycled rubber powder is simply added to asphalt compound, its weak interfacial bonding with asphalt will easily lead to a decline in the performance of the compound (such as low strength and poor heat resistance).

[0008] Therefore, there is an urgent need to develop a rubber-coated asphalt waterproof membrane that has strong adhesion to asphalt coatings, good durability, and functionality. Summary of the Invention

[0009] The purpose of this invention is to provide a rubber-coated bitumen waterproof membrane that combines high adhesion, weather resistance, sound insulation, and heat insulation functions.

[0010] To achieve the above objectives, a first aspect of the present invention provides a composition for rubber-coated bitumen waterproof membrane, the composition comprising a rubber compound A and activated rubber particles; wherein the activated rubber particles are rubber particles obtained by grafting modification of raw rubber particles. The amount of activated rubber particles used is 0.5-0.8 kg / m³. 2 ; The rubber compound A contains base asphalt I, aromatic oil, SBS / SIS composite modifier, tackifier and interface compatibilizer; Based on 100 parts by weight of the total weight of the rubber compound A, the content of the base bitumen I is 50-66 parts by weight, the content of the aromatic oil is 5-10 parts by weight, the content of the SBS / SIS composite modifier is 10-15 parts by weight, the content of the tackifier is 8-12 parts by weight, and the content of the interface compatibilizer is 1-4 parts by weight.

[0011] A second aspect of the present invention provides a method for preparing a rubber-coated bitumen waterproof membrane, the method comprising using the components of the composition described in the first aspect, including: (1) Mix the components in rubber compound A first to obtain the upper layer modified asphalt; (2) The modified asphalt layer, base material and activated rubber particles are molded to obtain the rubber-coated asphalt waterproof membrane.

[0012] A third aspect of the present invention provides a rubber-coated bitumen waterproof membrane prepared by the method described in the second aspect.

[0013] The fourth aspect of the present invention provides the application of the rubber-coated bitumen waterproof membrane described in the third aspect in building waterproofing.

[0014] Through the above technical solution, the present invention has at least the following advantages: (1) Improved bonding performance of the membrane: This invention improves the bonding strength and durability of the waterproof membrane by changing the bonding form between the surface rubber and the asphalt interface from "physical adsorption" to "chemical bonding" through surface chemical grafting modification.

[0015] (2) Multifunctional integrated: The rubber-coated asphalt waterproof membrane provided by this invention has multiple practical functions such as sound insulation, heat insulation and weather resistance, and the comprehensive value of the product is significantly higher than that of traditional single-function membranes.

[0016] (3) High efficiency of resource utilization and stable performance: The recycled rubber is used in both the surface layer and the asphalt matrix, forming a complete application loop; through sulfur stabilization technology, the performance stability of high-content recycled rubber powder in the base material is guaranteed, achieving the unity of environmental protection and performance.

[0017] (4) Strong technical synergy: “Surface activation-double layer adhesive compatibility-thermal process composite” constitutes a complete and closed-loop technical system. Each link supports each other, the logic is rigorous, and the overall effect is far better than the individual improvement of any link. Detailed Implementation

[0018] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0019] In this invention, the amount of activated rubber particles refers to the mass of activated rubber particles used in the preparation of a unit area of ​​rubber-coated asphalt waterproof membrane, expressed in kg / m². 2 .

[0020] As mentioned above, a first aspect of the present invention provides a composition for rubber-coated bitumen waterproof membrane, the composition comprising a rubber compound A and activated rubber particles; wherein the activated rubber particles are rubber particles obtained by grafting modification of raw rubber particles. The amount of activated rubber particles used is 0.5-0.8 kg / m³. 2 ; The rubber compound A contains base asphalt I, aromatic oil, SBS / SIS composite modifier, tackifier and interface compatibilizer; Based on 100 parts by weight of the total weight of the rubber compound A, the content of the base bitumen I is 50-66 parts by weight, the content of the aromatic oil is 5-10 parts by weight, the content of the SBS / SIS composite modifier is 10-15 parts by weight, the content of the tackifier is 8-12 parts by weight, and the content of the interface compatibilizer is 1-4 parts by weight.

[0021] Preferably, the base asphalt I is selected from at least one of 70# road petroleum asphalt and 90# road petroleum asphalt.

[0022] In this invention, the 70# road petroleum asphalt and the 90# road petroleum asphalt represent different grades of asphalt; wherein, the penetration of the 70# road petroleum asphalt at 25°C is 60-80 (0.1mm); and the penetration of the 90# road petroleum asphalt at 25°C is 80-100 (0.1mm).

[0023] Preferably, the aromatic oil is furfural extract oil with a pour point ≤ -10℃.

[0024] Preferably, the SBS / SIS composite modifier is a combination of SBS modifier II and SIS modifier in a mass ratio of 1:0.9-1.1. In this invention, SBS modifier II refers to a styrene-butadiene-styrene block copolymer, wherein the content of styrene structural units is 27-38 wt%; and SIS modifier refers to a styrene-isoprene-styrene block copolymer, wherein the content of styrene-isoprene diblocks is 10-20 wt%.

[0025] Preferably, the tackifier is selected from at least one of C5 petroleum resin and C9 petroleum resin.

[0026] Preferably, the interface compatibilizer is selected from at least one of polar copolymer wax and silane coupling agent.

[0027] In this invention, the polar copolymer wax is a polar copolymer specifically designed to improve the adhesion between asphalt and the substrate, increasing the adhesion of the asphalt to the substrate. For example, a polar copolymer wax with a density of approximately 0.93 g / cm³ and an acid value of approximately 28 mg KOH / g can be selected.

[0028] In this invention, the silane coupling agent is selected from at least one of KH550 and KH560.

[0029] Preferably, the activated rubber particles are a product prepared by the following method: S1. In the presence of a solvent, the free radical initiator and the grafted monomer are mixed to obtain an activation solution; S2. React the raw rubber particles with the activation liquid to obtain the activated rubber particles.

[0030] Preferably, the mass ratio of the free radical initiator, the grafted monomer, and the raw material rubber particles is 1:4-6:50-100.

[0031] More preferably, the free radical initiator is selected from at least one of dicumyl peroxide (DCP) and benzoyl peroxide (BPO).

[0032] Preferably, the grafting monomer is selected from at least one of acrylic acid monomer, methacrylic acid monomer, and maleic anhydride monomer.

[0033] In a preferred embodiment, the average diameter of the raw rubber particles is 0.5-2 mm.

[0034] In this invention, the raw material rubber particles refer to rubber particles obtained by crushing and screening recycled ethylene propylene diene monomer (EPDM) rubber or tire rubber; the tire rubber includes natural rubber, styrene-butadiene rubber, polybutadiene rubber and butyl rubber.

[0035] Preferably, the solvent is selected from at least one of toluene and xylene.

[0036] More preferably, the amount of solvent used is 300-500 mL relative to every 10 g of the grafted monomer.

[0037] Preferably, in step S2, the reaction conditions include: first reacting at temperature T1 for time t1, and then reacting at temperature T2 for time t2; wherein, the temperature T1 is 75-85℃, the time t1 is 0.5-1.5h; the temperature T2 is 140-150℃, and the time t2 is 2.5-3.5h.

[0038] More preferably, the reaction process within the time t2 is carried out under the protection of an inert gas.

[0039] Preferably, the reaction operation further includes: washing the particles with ethanol after the reaction is completed to remove unreacted graft monomers and byproducts, and drying to obtain the activated rubber particles.

[0040] Preferably, the composition further comprises an adhesive composition B for forming a base material, the adhesive composition B comprising a base bitumen II, an SBS modifier I, a softener, a functional filler, a filler, and a stabilizer.

[0041] More preferably, based on 100 parts by weight of the base asphalt II, the content of the base asphalt II is 40-50 parts by weight, the content of the SBS modifier I is 8-12 parts by weight, the content of the softener is 6-9 parts by weight, the content of the functional filler is 10-20 parts by weight, the content of the filler is 10-20 parts by weight, and the content of the stabilizer is 0.1-0.5 parts by weight.

[0042] More preferably, in the composition, the mass ratio of the content of rubber compound A to rubber compound B is 1:1-2.

[0043] In a preferred embodiment, the base asphalt II is selected from at least one of 70# road petroleum asphalt and 90# road petroleum asphalt.

[0044] In this invention, the SBS modifier I refers to a styrene-butadiene-styrene block copolymer, wherein the content of styrene structural units is 30-35 wt%. Preferably, the softener is selected from at least one of naphthenic oil, polyisobutylene, and aromatic oil.

[0045] More preferably, the flash point of the softener is ≥180℃.

[0046] Preferably, the functional filler is selected from at least one of reclaimed rubber powder, nitrile rubber powder, and TPU powder, with an average particle diameter of 250-380 μm.

[0047] Preferably, the filler is stone powder, selected from at least one of calcium carbonate, fly ash, and talc, with an average particle diameter of 75-100 μm.

[0048] In a preferred embodiment, the stabilizer is selected from at least one of insoluble sulfur and dicumyl peroxide (DCP).

[0049] As previously described, a second aspect of the present invention provides a method for preparing a rubber-coated bitumen waterproof membrane, the method comprising using the components of the composition described in the first aspect, including: (1) Mix the components in rubber compound A first to obtain the upper layer modified asphalt; (2) The modified asphalt layer, base material and activated rubber particles are molded to obtain the rubber-coated asphalt waterproof membrane.

[0050] Preferably, in step (1), the conditions for the first mixing include: a temperature of 170-180°C and a time of 1.5-2.5h.

[0051] More preferably, the first mixing operation further includes: first heating the base asphalt I to the temperature of the first mixing, then sequentially adding the aromatic oil, the tackifier, the SBS / SIS composite modifier and the interface compatibilizer, and high-speed shearing blending until the system is homogeneous to obtain the upper layer modified asphalt. The stirring speed of this high-speed shearing blending process is 800-1200 rpm.

[0052] Preferably, the method further includes: performing a second mixing of the components in the adhesive combination B to obtain a base material.

[0053] According to a particularly preferred embodiment, the method for preparing the rubber-coated bitumen waterproof membrane includes the following steps: (1) The base asphalt I, aromatic oil, SBS / SIS composite modifier, tackifier and interface compatibilizer are mixed in the first stage to obtain the upper layer modified asphalt; and The base layer material is obtained by second mixing of base asphalt II, SBS modifier I, softener, functional filler, filler and stabilizer; (2) The modified asphalt, the base material and the activated rubber particles are molded to obtain the rubber-coated asphalt waterproof membrane.

[0054] Preferably, the conditions for the second mixing include: a temperature of 175-185°C and a time of 2.5-3.5 h.

[0055] More preferably, the second mixing operation further includes: heating the base asphalt II to the temperature of the second mixing, adding the SBS modifier I and the softener at a stirring speed of 800-1200 rpm, and dispersing at high speed until the SBS modifier I is completely swollen and uniformly dispersed. Then, the functional filler is added, and after it is fully impregnated, the filler and the stabilizer are finally added, so that the stabilizer reacts with the functional filler and the SBS modifier I to obtain the base material.

[0056] Preferably, the molding process includes: dipping or scraping the pretreated base material in a molten state onto the surface of the base layer to form a lower base adhesive layer; while the lower base adhesive layer is still warm, coating the upper modified asphalt in a molten state onto the lower base adhesive layer to form an upper adhesive layer; while the upper adhesive layer is still in a high-temperature molten state, uniformly and densely spreading the activated rubber particles onto its surface using a spreading device, and gently pressing them with a pressure roller to firmly embed the lower half of the particles, forming a rubber-coated surface layer; then cooling and shaping the material in a cooling water tank or cooling roller, covering the lower surface of the lower base adhesive layer with a release film, and rolling it up to obtain the rubber-coated asphalt waterproof membrane.

[0057] In this invention, the pretreatment refers to applying the base material to a pre-impregnation tank containing 70# road petroleum asphalt and 3# road petroleum asphalt in a mass ratio of 1:0.9-1.1 and squeezing it dry; the 3# road petroleum asphalt is asphalt flakes from Dalian Hengli Petrochemical, with a penetration of 1-8 (0.1 mm) and a softening point between 100-130℃.

[0058] More preferably, the thickness of the lower base adhesive layer is 1-1.5 mm; and the thickness of the upper adhesive layer is 0.3-0.6 mm.

[0059] As previously stated, a third aspect of the present invention provides a rubber-coated bitumen waterproof membrane prepared by the method described in the second aspect.

[0060] As previously stated, the fourth aspect of the present invention provides the application of the rubber-coated bitumen waterproof membrane described in the third aspect in building waterproofing.

[0061] The present invention will be described in detail below through embodiments. Unless otherwise specified, the raw materials and equipment used in the following embodiments are commercially available products.

[0062] The recycled EPDM rubber, grade 1-2mm colored, was purchased from Lingshou County Erlei Mining Co., Ltd., and its source was plastic running tracks. The recycled tire rubber is mainly natural rubber, with a grade of 1-3mm, purchased from Shifeng Mining Processing Plant in Lingshou County, and the source of the recycled tires is pure truck tires. Base asphalt I: Grade 70 road petroleum asphalt, purchased from Sinopec Maoming Petrochemical Company; Base Asphalt II: Grade 70 road petroleum asphalt, purchased from Sinopec Maoming Petrochemical Company; Aromatic oil: furfural extract oil, pour point ≤ -10℃, purchased from Hengshui Diyi Petrochemical Co., Ltd. Tackifier: C5 petroleum resin, grade D0201, purchased from Shenzhen Yoshida Chemical Co., Ltd. SBS Modifier I: The content of styrene structural units is 31wt%, the brand name is KRATON D1101, and it was purchased from Shanghai Wentai Plastic Technology Co., Ltd. SBS / SIS composite modifier: a combination of SBS modifier II and SIS modifier in a mass ratio of 1:1; wherein the content of styrene structural units in SBS modifier II is 31wt%, brand name KRATON D1101, purchased from Shanghai Wentai Plastics Technology Co., Ltd.; the content of styrene-isoprene diblock in SIS modifier is 15wt%, brand name KETON D1107, purchased from Dongguan Suwei New Materials Co., Ltd. Interface compatibilizer: polar copolymer wax, density 0.93 g / cm³, acid value 28 mg KOH / g, brand name CERALENECP30M, purchased from Foshan Weng Kai'er Trading Co., Ltd.; Softener: naphthenic oil, brand name Yunjin KN4010, purchased from Hebei Yunjin Lubricating Oil Co., Ltd., flash point ≥180℃; Functional filler: Reclaimed rubber powder with an average particle diameter of 250μm, purchased from Lingshou County Nanyu Mineral Products Processing Plant; Filler: Calcium carbonate, with an average particle diameter of 75μm and a purity of ≥95%, purchased from Foshan Huiyisheng Technology Co., Ltd. Stabilizer: Sulfur, specifically insoluble sulfur, purchased from Kunshan Shengan Biotechnology Co., Ltd.

[0063] Preparation Example 1 Activated rubber particles are prepared using the following steps: S1. The recycled ethylene propylene diene monomer (EPDM) rubber is crushed and screened to obtain raw rubber particles with an average diameter of 1 mm. S2. Dissolve 2g of free radical initiator (specifically dicumyl peroxide) and 10g of graft monomer (specifically acrylic acid monomer) in 300mL of toluene to obtain an activation solution; S3. Immerse 100g of the raw rubber particles obtained in step S1 in the activation solution obtained in step S2 and soak at 80°C for 1 hour; then, under the protection of an inert gas (specifically nitrogen), raise the temperature to 140°C and react for 3 hours. S4. After the reaction is complete, the particles are washed with ethanol and dried to obtain activated rubber particles, which are named S-1.

[0064] The amounts of the above materials are for reference only. If necessary, mass production can be carried out according to the above proportions.

[0065] Preparation Example 2 The same process as in Preparation Example 1 was used, except that the impregnation of the raw rubber particles in the activation solution was omitted in step S3 of this preparation example. Specifically, step S3 is as follows: Under inert gas protection, 100g of the raw rubber particles obtained in step S1 were immersed in the activation solution obtained in step S2 and reacted at 140°C for 3 hours.

[0066] The activated rubber particles prepared in this example are named S-2.

[0067] Preparation Example 3 The same process flow as in Preparation Example 1 was used, except that in step S1 of this preparation example, recycled tire rubber (mainly natural rubber) was used instead of EPDM rubber.

[0068] The activated rubber particles prepared in this example are named S-3.

[0069] Example 1 (1) Heat 5000 kg of base asphalt I to 180°C to melt, then add aromatic oil, tackifier, SBS / SIS composite modifier and interface compatibilizer in sequence, and mix at a stirring speed of 1000 rpm for 2 hours to obtain the upper layer modified asphalt. (2) Heat 5000 kg of base asphalt II to 180°C to melt. Add SBS modifier and softener at a stirring speed of 1200 rpm and disperse them so that the SBS modifier is completely swollen and evenly dispersed. Then add functional filler. After it is fully impregnated, add filler and stabilizer so that the stabilizer, functional filler and SBS modifier can undergo cross-linking reaction for 3 hours to obtain base material. (3) The base material is coated and squeezed dry in a pre-impregnation tank containing 70# road petroleum asphalt and 3# road petroleum asphalt in a mass ratio of 1:1. Then, it is unrolled by an unwinding device, and the base material obtained in step (2) is scraped onto the upper and lower surfaces of the base material to form a 1.5mm thick lower base adhesive layer. Then, the molten upper modified asphalt obtained in step (1) is coated onto the lower base adhesive layer to form a 0.3mm thick upper adhesive layer. While the upper adhesive layer is still in a high-temperature molten state, the activated rubber particles are evenly and densely spread on the surface by a spreading device at a rate of 0.7kg of activated rubber particles per square meter of roll material. The particles are then gently pressed by a pressure roller to make the lower half of the particles firmly embedded to form a rubber coating layer. Then, the lower surface of the lower base adhesive layer is covered with a release film by a cooling roller and rolled up to obtain a rubber-coated asphalt waterproof roll material.

[0070] The remaining specific process parameters of this embodiment are shown in Table 1.

[0071] Examples 2-6 Examples 2 through 6 all used the same process as Example 1, with the differences listed in Table 1.

[0072] Comparative Examples 1-6 Comparative Examples 1-6 all used the same process as Example 1, with the differences listed in Table 1.

[0073] Table 1

[0074] Table 1 (continued)

[0075] Test case The performance test data of the rubber-coated bitumen waterproof membranes prepared in the examples and comparative examples are shown in Table 2.

[0076] Peel strength refers to the peel strength between the rubber overlay layer and the upper adhesive layer, and is tested in accordance with the method in GB / T23457-2017 "Pre-laid Waterproof Membranes" 6.20 Peel Strength of Membranes and Post-poured Concrete.

[0077] Low-temperature flexibility was tested according to the method in 6.16 Low-temperature flexibility of GB / T 23457-2017 "Pre-laid Waterproof Membranes".

[0078] The tensile strength was tested according to the method in 6.8 Tensile Properties of GB / T 23457-2017 "Pre-laid Waterproof Membranes".

[0079] The accelerated aging operating conditions refer to section 6.20.4 of GB / T23457-2017, which describes ultraviolet treatment, and the ultraviolet irradiation time is extended to one week.

[0080] The thermal conductivity was tested in accordance with GB / T 10294-2008 "Determination of Steady-State Thermal Resistance and Related Properties of Insulation Materials - Protective Hot Plate Method".

[0081] The weighted sound insulation was tested in accordance with GB / T 19889.3-2005 "Acoustic Buildings and Building Components Sound Insulation Measurement Part 3: Laboratory Measurement of Airborne Sound Insulation of Building Components".

[0082] Table 2

[0083] The results above show that the rubber-coated bitumen waterproof membrane provided by the present invention has high bonding strength, excellent sound insulation, heat insulation and weather resistance, and also helps to realize the efficient and high-value recycling of waste rubber resources in the field of building waterproof materials.

[0084] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A composition for rubber-coated bitumen waterproof membrane, characterized in that, The composition contains rubber compound A and activated rubber particles; the activated rubber particles are rubber particles obtained by grafting modification of raw rubber particles; The amount of activated rubber particles used is 0.5-0.8 kg / m³. 2 ; The rubber compound A contains base asphalt I, aromatic oil, SBS / SIS composite modifier, tackifier and interface compatibilizer; Based on 100 parts by weight of the total weight of the rubber compound A, the content of the base bitumen I is 50-66 parts by weight, the content of the aromatic oil is 5-10 parts by weight, the content of the SBS / SIS composite modifier is 10-15 parts by weight, the content of the tackifier is 8-12 parts by weight, and the content of the interface compatibilizer is 1-4 parts by weight.

2. The composition according to claim 1, characterized in that, The interface compatibilizer is selected from at least one of polar copolymer wax and silane coupling agent.

3. The composition according to claim 1, characterized in that, The activated rubber particles are a product prepared by the following method: S1. In the presence of a solvent, the free radical initiator and the grafted monomer are mixed to obtain an activation solution; S2. React the raw rubber particles with the activation liquid to obtain the activated rubber particles.

4. The composition according to claim 3, characterized in that, The mass ratio of the free radical initiator, the grafted monomer, and the raw rubber particles is 1:4-6:50-100. And / or, the grafting monomer is selected from at least one of acrylic acid monomers, methacrylic acid monomers, and maleic anhydride monomers.

5. The composition according to claim 3 or 4, characterized in that, In step S2, the reaction conditions include: first reacting at temperature T1 for time t1, then reacting at temperature T2 for time t2; wherein, The temperature T1 is 75-85℃, and the time t1 is 0.5-1.5h; The T2 temperature is 140-150℃, and the t2 time is 2.5-3.5h.

6. The composition according to any one of claims 1-3, characterized in that, The composition also contains an adhesive compound B for forming a base material, the adhesive compound B containing base bitumen II, SBS modifier I, softener, functional filler, filler and stabilizer; Preferably, based on 100 parts by weight of the total weight of the rubber compound B, the content of the base asphalt II is 40-50 parts by weight, the content of the SBS modifier I is 8-12 parts by weight, the content of the softener is 6-9 parts by weight, the content of the functional filler is 10-20 parts by weight, the content of the filler is 10-20 parts by weight, and the content of the stabilizer is 0.1-0.5 parts by weight.

7. A method for preparing rubber-coated bitumen waterproof membrane, characterized in that, This method is performed using any of the components in the composition according to any one of claims 1-6, comprising: (1) Mix the components in rubber compound A first to obtain the upper layer modified asphalt; (2) The modified asphalt layer, base material and activated rubber particles are molded to obtain the rubber-coated asphalt waterproof membrane.

8. The method according to claim 7, characterized in that, In step (1), the conditions for the first mixing include: a temperature of 170-180°C and a time of 1.5-2.5h.

9. A rubber-coated bitumen waterproof membrane prepared by the method of claim 7 or 8.

10. The application of the rubber-coated bitumen waterproof membrane according to claim 9 in building waterproofing.

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