Composition for bituminous waterproofing membrane, bituminous waterproofing membrane and preparation method and application thereof

Abstract

This invention relates to the field of building waterproofing materials technology, and discloses a composition for asphalt waterproofing membranes, an asphalt waterproofing membrane, its preparation method, and its application. The composition contains a main agent and additives; the main agent includes an asphalt composition, a petroleum resin composition, naphthenic oil, and a modifier; the asphalt composition is a combination of asphalt with a penetration of 180-255 / 0.1 mm and asphalt with a penetration of 60-80 / 0.1 mm in a mass ratio of 1:1-3; the petroleum resin composition is C5 petroleum resin and hydrogenated petroleum resin in a mass ratio of 1:1.2-3.5; the modifier is styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, and styrene-butadiene rubber in a mass ratio of 1:1-2.5:1-2.5. The asphalt waterproofing membrane obtained by this invention exhibits excellent low-temperature construction performance, low-temperature stability, water penetration resistance, adhesion performance, and peel strength.

Description

Technical Field

[0001] This invention relates to the field of building waterproofing materials technology, specifically to a composition for asphalt waterproofing membrane, an asphalt waterproofing membrane, its preparation method, and its application. Background Technology

[0002] Traditional self-adhesive polymer waterproof membranes are waterproof membranes made with self-adhesive polymer-modified bitumen as the base material, synthetic polymer membranes, atactic polypropylene membranes, and other materials as surface materials, supplemented by isolation materials. Due to their convenient construction, no need for open flame operations, and ability to fully adhere to the substrate to form a seamless waterproof layer, they are widely used in waterproofing projects for roofs, basements, and interiors of industrial and civil buildings. However, due to insufficient low-temperature performance, their flexibility and adhesion decrease in low-temperature environments, which limits their application in cold regions and low-temperature environments such as winter.

[0003] Therefore, there is an urgent need to develop a waterproof membrane that can be constructed normally and maintain good performance in low-temperature environments, so as to realize the reliable application of waterproof membranes in a wider range of environmental conditions and provide a better option for the construction and long-term stable use of various waterproofing projects in low-temperature environments.

[0004] CN104194719A discloses a creep-resistant self-adhesive bitumen waterproof membrane. The self-adhesive bitumen adhesive composition is as follows (by weight): petroleum bitumen 35%–55%, softener 5%–25%, modifier 5%–25%, tackifier 2%–8%, interface agent 0.1%–2%, antioxidant 0.1%–3%, and filler 5%–20%. The petroleum bitumen is naphthenic petroleum bitumen grade A with a penetration of 70–200 (based on 0.1 mm). The tackifier is alkylphenol resin or C5 petroleum resin. The solution comprises one or more of the following: terpene resin, liquid rosin resin, hydrogenated rosin glycerol ester, phenolic resin, polyisobutylene, and liquid C5 resin. This solution focuses on the creep resistance of the membrane, and its low-temperature flexibility is consistent with the -30℃ requirement of traditional self-adhesive polymer-modified bitumen waterproof membrane Type II. This technology can only be applied in environments above 5℃. Compared to traditional self-adhesive polymer-modified bitumen waterproof membranes, it does not offer a breakthrough improvement, only exhibiting creep resistance in terms of full adhesion. It can self-heal and seal cracks and capillaries. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems of poor low-temperature construction performance, low-temperature stability, water penetration resistance, adhesion performance and peel strength of existing asphalt waterproof membranes.

[0006] To achieve the above objectives, a first aspect of the present invention provides a composition for asphalt waterproof membrane, the composition comprising a main agent and additives; said main agent includes an asphalt composition, a petroleum resin composition, a naphthenic oil, and a modifier;

[0007] Based on the total mass of the composition, the composition contains 45-50 wt% of an asphalt composition, 2-4 wt% of a petroleum resin composition, 5-11 wt% of a modifier, 4-8 wt% of a naphthenic oil, and 21-40 wt% of additives.

[0008] The asphalt composition is a combination of asphalt with a penetration of 180-255 / 0.1 mm and asphalt with a penetration of 60-80 / 0.1 mm, with a mass ratio of 1:1-3.

[0009] The petroleum resin composition is a combination of C5 petroleum resin and hydrogenated petroleum resin with a content-to-mass ratio of 1:1.2-3.5;

[0010] The modifier is a combination of styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer and styrene-butadiene rubber in a mass ratio of 1:1-2.5:1-2.5.

[0011] A second aspect of the present invention provides a method for preparing an asphalt waterproof membrane, the method comprising: sequentially performing melt blending and calendering on a mixture containing the composition described in the first aspect to obtain the asphalt waterproof membrane.

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

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

[0014] This invention utilizes the synergistic effect between the raw materials in the composition of asphalt waterproof membrane, and carefully designs and optimizes the proportions of each raw material to ensure mutual support among them, thereby giving the waterproof material excellent performance in various performance indicators.

[0015] The technical solution provided by this invention has at least the following advantages over the prior art:

[0016] (1) Excellent low-temperature construction performance. The waterproof membrane provided by this invention can be used normally in temperature climate conditions of 0 to 5℃, breaking through the limitation that conventional self-adhesive polymer modified bitumen waterproof membranes cannot be constructed below 5℃, greatly expanding the temperature range of construction, improving the flexibility and efficiency of construction, especially in cold regions or winter construction, which has obvious advantages and can effectively shorten the construction period.

[0017] (2) Good low-temperature stability. Conventional products suffer severe degradation of self-adhesive properties after being placed at 5-10℃ for 3-5 months. The asphalt waterproof membrane provided by this invention has more stable performance, with a stability of more than 1 year, avoiding the problem of affecting the waterproof effect due to performance degradation.

[0018] (3) Excellent resistance to water seepage. The asphalt waterproof membrane provided by this invention has 100% water seepage resistance after construction and application, which means that the waterproof membrane can effectively prevent water from seeping into the waterproof layer, greatly improving the reliability and durability of waterproofing, and fundamentally solving the water seepage problem of traditional membranes.

[0019] (4) Excellent adhesion and peel strength. The bitumen waterproof membrane provided by this invention has better adhesion performance, ensuring a tight bond between the membrane and the substrate, effectively resisting deformation and cracking of the substrate, and improving the overall stability of the waterproof system. The higher peel strength makes the membrane less likely to separate from the substrate during use, ensuring the durability of the waterproof effect. Detailed Implementation

[0020] 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.

[0021] As previously described, a first aspect of the present invention provides a composition for bituminous waterproof membrane, the composition comprising a main agent and additives; the main agent includes a bituminous composition, a petroleum resin composition, naphthenic oil, and a modifier;

[0022] Based on the total mass of the composition, the composition contains 45-50 wt% of an asphalt composition, 2-4 wt% of a petroleum resin composition, 5-11 wt% of a modifier, 4-8 wt% of a naphthenic oil, and 21-40 wt% of additives.

[0023] The asphalt composition is a combination of asphalt with a penetration of 180-255 / 0.1 mm and asphalt with a penetration of 60-80 / 0.1 mm, with a mass ratio of 1:1-3.

[0024] The petroleum resin composition is a combination of C5 petroleum resin and hydrogenated petroleum resin with a content-to-mass ratio of 1:1.2-3.5;

[0025] The modifier is a combination of styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer and styrene-butadiene rubber in a mass ratio of 1:1-2.5:1-2.5.

[0026] It should be noted that, in this invention, asphalt with a penetration of 180-250 / 0.1mm refers to the depth to which a standard needle penetrates vertically into an asphalt sample under a load of 50 grams at 4°C for 5 seconds, expressed in units of 1 / 10 mm; asphalt with a penetration of 60-80 / 0.1mm refers to the depth to which a standard needle penetrates vertically into an asphalt sample under a load of 100 grams at 25°C for 5 seconds, expressed in units of 1 / 10 mm.

[0027] Preferably, based on the total mass of the composition, the composition contains 46-48.5 wt% of an asphalt composition, 3.5-4 wt% of a petroleum resin composition, 9-11 wt% of a modifier, 5-7 wt% of a naphthenic oil, and 27-35 wt% of additives. The inventors have found that, under this preferred embodiment, the asphalt waterproof membrane exhibits better low-temperature workability and stability, as well as better adhesion and peel strength.

[0028] Preferably, the additives include silane coupling agents, antioxidants, and fillers.

[0029] More preferably, based on the total mass of the composition, the content of the antioxidant is 1-2 wt%, the content of the silane coupling agent is 0.2-1 wt%, and the content of the filler is 25-30 wt%.

[0030] Preferably, the antioxidant is tris(2,4-di-tert-butylphenyl) phosphite.

[0031] Preferably, the silane coupling agent is 3-glycidyl etheroxypropyltrimethoxysilane. More preferably, the filler is selected from at least one of heavy calcium carbonate and talc.

[0032] More preferably, the filler is talc powder with an average particle diameter of 70-80 μm.

[0033] Preferably, the asphalt composition is a combination of F400 asphalt and 70# asphalt in a mass ratio of 1:1.1-1.2. The inventors have found that, under this preferred embodiment, the asphalt waterproof membrane exhibits better low-temperature workability and stability, as well as better adhesion and peel strength.

[0034] More preferably, the F400 asphalt has a flash point ≥200℃, a wax content ≤1.7wt%, and a low-temperature flexibility <-15℃.

[0035] More preferably, the 70# asphalt has a softening point of 44-48℃, an elongation of ≥100cm, and a wax content of ≤1.7wt%.

[0036] In a preferred embodiment, the petroleum resin combination is a combination of C5 petroleum resin and hydrogenated petroleum resin in a mass ratio of 1:1.3-1.5. The inventors have discovered that, under this preferred embodiment, the hydrogenated petroleum resin, with its good flexibility, more saturated molecular structure, and low low-temperature brittleness, and the C5 petroleum resin, with its higher polarity and molecular weight, can achieve superior performance synergy, resulting in an asphalt waterproof membrane with better low-temperature workability and stability, as well as better adhesion and peel strength.

[0037] Preferably, the modifier is a combination of styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, and styrene-butadiene rubber in a mass ratio of 1:1.4-1.5:1.1-1.2. The inventors have found that, under this preferred embodiment, the asphalt waterproof membrane exhibits better low-temperature workability and stability, as well as better adhesion and peel strength.

[0038] More preferably, the styrene-butadiene-styrene block copolymer has a star-shaped molecular structure, an average molecular weight of 200,000-320,000 g / mol, and a density of 0.93-0.95 g / cm³. 3 The styrene content is 30-32 wt%.

[0039] More preferably, the styrene-isoprene-styrene block copolymer has a linear molecular structure, a melt flow rate of 8-12 g / 10 min, a tensile strength ≥12 MPa, and a viscosity of 1100-1600 mpa·s for a 25 wt% toluene solution.

[0040] As previously stated, a second aspect of the present invention provides a method for preparing an asphalt waterproof membrane, the method comprising: sequentially performing melt blending and calendering on a mixture containing the composition described in the first aspect to obtain the asphalt waterproof membrane.

[0041] Preferably, the method further includes:

[0042] (1) A first mixture containing asphalt composite and naphthenic oil is first mixed to obtain material I;

[0043] (2) The modifier is mixed with material I for the second time to obtain material II;

[0044] (3) The petroleum resin combination, additives and material II are mixed in a third mixture to obtain material III;

[0045] (4) The material III is subjected to calendering and molding to obtain the asphalt waterproof membrane.

[0046] Preferably, in step (1), the conditions for the first mixing include: a temperature of 170-180°C and a time of 0.1-2h.

[0047] Preferably, the first mixing is carried out under stirring conditions, and the stirring speed is 600 to 1000 rpm.

[0048] Preferably, in step (2), the conditions for the second mixing include: a temperature of 180-185°C and a time of 1-2 hours.

[0049] It should be noted that in this invention, in step (2), in order to fully melt each component, colloid milling can be performed after the second mixing.

[0050] Preferably, the conditions for the third mixing include: a temperature of 165-185°C and a time of 1-2 hours.

[0051] More preferably, in step (3), the method further includes premixing the petroleum resin combination, antioxidant, silane coupling agent and material II, and then mixing them with filler for a third time; the premixing temperature is 170-180℃ and the time is 0.5-2h.

[0052] As previously stated, a third aspect of the present invention provides a bitumen waterproof membrane prepared by the method described in the second aspect.

[0053] As previously stated, the fourth aspect of the present invention provides the application of the bitumen waterproof membrane described in the third aspect in building waterproofing.

[0054] The present invention will be described in detail below through examples.

[0055] Unless otherwise specified, all reagents and raw materials used in the following examples are commercially available products, and all reagents are analytical grade products.

[0056] In the following examples, unless otherwise specified, each wt% represents 0.1 kg.

[0057] raw material:

[0058] F400 Asphalt I: Penetration of 220 (based on 0.1 mm) at 4℃, flash point of 235℃, low temperature flexibility of <-15℃, wax content of 1.5%, grade (model): F400, purchased from Wenzhou Branch of PetroChina Fuel Oil Co., Ltd.

[0059] 70# Asphalt I: Penetration of 70 (0.1 mm) at 25℃, softening point of 47.5℃, elongation (5 cm / min) of more than 150 cm at 15℃, wax content of 1.4%, grade: 70#, purchased from Shandong Jingbo Petrochemical Co., Ltd.

[0060] F400 Asphalt II: Penetration of 252 (0.1 mm) at 4℃, flash point of 238℃, wax content of 1.9%, grade (model): F400, purchased from Foshan Gaofu PetroChina Fuel Asphalt Co., Ltd.

[0061] 70# Asphalt II: Penetration of 70 (0.1 mm) at 25℃, softening point of 49℃, wax content of 1.8%, grade: 70#, purchased from Shandong Shengxing Chemical Co., Ltd.

[0062] Asphalt Combination I: A combination of F400 asphalt I and 70# asphalt I with a content-to-mass ratio of 1:1.11;

[0063] Asphalt Combination II: A combination of F400 asphalt II and 70# asphalt II with a content-to-mass ratio of 1:1.11;

[0064] Asphalt Combination III: A combination of F400 asphalt I and 70# asphalt I with a content-to-mass ratio of 1:2;

[0065] Hydrogenated petroleum resin: DCPD hydrogenated petroleum resin, model: PRS-5120, purchased from Shandong Shenxian Ruisen Petroleum Resin Co., Ltd.

[0066] C5 petroleum resin: Model: A1100G, purchased from Fujian Fuhua Luhua New Materials Co., Ltd.

[0067] Petroleum resin combination I: a combination of C5 petroleum resin and DCPD hydrogenated petroleum resin in a mass ratio of 1:1.33;

[0068] Petroleum resin composition II: A combination of C5 petroleum resin and DCPD hydrogenated petroleum resin in a mass ratio of 1:1.

[0069] Styrene-butadiene-styrene block copolymer I: The molecular structure is star-shaped, with an average molecular weight of 250,000 g / mol and a density of 0.94 g / cm³. 3 The styrene content is 31 wt%; grade: thermoplastic elastomer SBS LG411, purchased from LG Chem, South Korea;

[0070] Styrene-butadiene block copolymer II: styrene content is 34 wt%; grade: YH-188E, purchased from Yueyang Baling Petrochemical Company;

[0071] Styrene-isoprene-styrene block copolymer: The molecular structure is linear, the melt flow rate is 10 g / 10 min, the tensile strength is 13 MPa, and the viscosity of a 25 wt% toluene solution is 1250 mPa·s; the model is thermoplastic rubber SIS YH-1105, purchased from Sinopec Hunan Yueyang Petrochemical Company.

[0072] Modifier I: a combination of styrene-butadiene-styrene block copolymer I, styrene-isoprene-styrene block copolymer and styrene-butadiene rubber in a mass ratio of 1:1.4:1.2;

[0073] Modifier II: A combination of styrene-butadiene-styrene block copolymer II, styrene-isoprene-styrene block copolymer and styrene-butadiene rubber in a mass ratio of 1:1.4:1.2;

[0074] Modifier III: A combination of styrene-butadiene-styrene block copolymer I, styrene-isoprene-styrene block copolymer and styrene-butadiene rubber in a mass ratio of 1:1.2:1.2;

[0075] Antioxidant: Tris(2,4-di-tert-butylphenyl) phosphate, purchased from Sanfeng Chemical Co., Ltd., Linyi City, Shandong Province;

[0076] Silane coupling agent: 3-glycidyl etheroxypropyltrimethoxysilane, purchased from Hangzhou Jessica Chemical Co., Ltd.;

[0077] Filler: Talc powder with an average particle diameter of 75μm.

[0078] Example 1

[0079] This embodiment illustrates that the asphalt waterproof membrane of the present invention is prepared according to the formula in Table 1 and the method described below:

[0080] (1) The asphalt mixture and naphthenic oil are mixed for the first time to obtain material I; the conditions for the first mixing are: temperature of 175℃ and time of 0.5h.

[0081] (2) The modifier is mixed with material I in a second mixing process to obtain material II; the conditions for the second mixing process are: temperature 185°C and time 1 hour.

[0082] (3) The petroleum resin combination, antioxidant, silane coupling agent and material II are premixed (at a temperature of 175°C for 1 hour), and then mixed with talc powder to obtain material III; the conditions for the third mixing are: temperature of 170°C for 1 hour.

[0083] (4) The material III is subjected to calendering and molding to obtain the asphalt waterproof membrane.

[0084] Unless otherwise specified, the remaining examples follow a similar process to Example 1, except that the formulations used in each example are different, as detailed in Table 1 (Note: Parameters not listed in Table 1 are the same as those in Example 1).

[0085] Table 1

[0086] Asphalt combination Asphalt Combination I Asphalt Combination I Asphalt Combination II Asphalt Combination III Dosage (wt%) 48.5 46 48.5 48.5 Petroleum resin combination Petroleum resin composition I Petroleum resin composition I Petroleum resin composition I Petroleum resin composition I Dosage (wt%) 3.5 4 3.5 3.5 Modifier Modifier I Modifier I Modifier I Modifier I Dosage (wt%) 9 10 9 9 antioxidants Dosage (wt%) 1.5 1.5 1.5 1.5 Naphthenic oil Dosage (wt%) 7 6.5 7 7 Silane coupling agents Dosage (wt%) 0.5 0.5 0.5 0.5 filler Dosage (wt%) 30 31.5 30 30 name S1 S2 S3 S4

[0087] Table 1 (continued)

[0088]

[0089]

[0090] Comparative Example 1

[0091] This comparative example follows a similar process to Example 1. The difference is that in this comparative example, the amount of asphalt mixture is controlled to be the same as in Example 1, but 90# asphalt (with a penetration of 89 (1 / 10 mm), purchased from Foshan Gaofu Zhong Petroleum Fuel Asphalt Co., Ltd., Guangdong Province) is used to replace F400 asphalt I in Example 1.

[0092] Everything else is the same as in Example 1.

[0093] The asphalt waterproof membrane DS1 was prepared.

[0094] Comparative Example 2

[0095] This comparative example follows a similar process to Example 1. The difference is that in this comparative example, the amount of asphalt mixture is controlled to be the same as in Example 1, but an equal mass of 70# asphalt I is used instead of F400 asphalt I in Example 1.

[0096] Everything else is the same as in Example 1.

[0097] The asphalt waterproof membrane DS2 was prepared.

[0098] Comparative Example 3

[0099] This comparative example follows a similar process to Example 1. The difference is that in this comparative example, the amount of petroleum resin combination is controlled in the same way as in Example 1, but the DCPD hydrogenated petroleum resin in Example 1 is replaced by PVC polyethylene resin of the same mass.

[0100] Everything else is the same as in Example 1.

[0101] The asphalt waterproof membrane DS3 was prepared.

[0102] Comparative Example 4

[0103] This comparative example follows a similar process to Example 1. The difference is that the amount of modifier used in this comparative example is the same as in Example 1, but butyl rubber is used to replace the styrene-butadiene rubber in Example 1.

[0104] Everything else is the same as in Example 1.

[0105] The asphalt waterproof membrane DS4 was prepared.

[0106] Comparative Example 5

[0107] This comparative example follows a similar process to Example 1. The difference is that the amount of modifier used in this comparative example is the same as in Example 1, but the linear SBS791 modifier from Yueyang Petrochemical is used to replace the styrene-butadiene-styrene block copolymer I in Example 1.

[0108] Everything else is the same as in Example 1.

[0109] The asphalt waterproof membrane DS5 was prepared.

[0110] Test case

[0111] 1. Adhesion performance test: The test standard is: according to the 5.15 tack test method in GB / T35467-2017 standard;

[0112] 2. Peel strength test: The test standard is as follows: according to the test method of 5.13.1 peel strength of roll material to roll material (untreated) in GB / T35467-2017;

[0113] 3. Low-temperature construction performance test: The test standard is as follows: according to the test method of peel strength with cement mortar (untreated) in GB / T35467-2017, 5.16.1; in particular, after the specimen is prepared according to 5.16.2, it is placed in an environment of 3±2 (0~5)℃ for 48h to remove the film. In order to verify the stability of construction performance under low temperature environment, it is placed in an environment of 3±2 (0~5)℃ for 72h after removal of the film, and then oxidized under standard curing conditions for 168h, and then tested according to 5.16.3.

[0114] 4. Low-temperature stability test: The test standard is: according to the low-temperature flexibility test method in section 5.11 of GB / T35467-2017;

[0115] 5. Water penetration resistance test: The test standard is: GB / T35467-2017 standard 5.12 Impermeability test method;

[0116] The performance of the bituminous waterproof membranes obtained in each example was tested using the above test methods. The test results are shown in Table 2.

[0117] Table 2

[0118]

[0119] As can be seen from the results in Table 2, the asphalt waterproof membrane obtained by the present invention has superior low-temperature construction performance, low-temperature stability, water penetration resistance, adhesion performance and peel strength.

[0120] 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 bituminous waterproofing sheet, characterized by, The composition contains a main agent and an auxiliary agent; the main agent includes an asphalt composition, a petroleum resin composition, a naphthenic oil, and a modifier; Based on the total mass of the composition, the composition contains 45-50 wt% of an asphalt composition, 2-4 wt% of a petroleum resin composition, 5-11 wt% of a modifier, 4-8 wt% of a naphthenic oil, and 21-40 wt% of additives. The asphalt mixture is a combination of F400 asphalt and 70# asphalt with a content-to-mass ratio of 1:1.1-1.2; The petroleum resin composition is a combination of C5 petroleum resin and hydrogenated petroleum resin with a content-to-mass ratio of 1:1.2-3.5; The modifier is a combination of styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer and styrene-butadiene rubber in a content-to-mass ratio of 1:1.4-1.5:1.1-1.

2.

2. The composition of claim 1, wherein, Based on the total mass of the composition, the composition contains 46-48.5 wt% of an asphalt composition, 3.5-4 wt% of a petroleum resin composition, 9-11 wt% of a modifier, 5-7 wt% of a naphthenic oil, and 27-35 wt% of additives.

3. The composition of claim 2, wherein, The additives include silane coupling agents, antioxidants, and fillers.

4. The composition of claim 3, wherein, Based on the total mass of the composition, the content of the antioxidant is 1-2 wt%, the content of the silane coupling agent is 0.2-1 wt%, and the content of the filler is 25-30 wt%.

5. The composition according to claim 1 or 2, characterized in that, The F400 asphalt has a flash point ≥200℃, a wax content ≤1.7wt%, and a low-temperature flexibility <-15℃.

6. The composition of claim 5, wherein, The softening point of the 70# asphalt is 44-48℃, the elongation is ≥100 cm, and the wax content is ≤1.7wt%.

7. The composition of any one of claims 1-3, wherein, The petroleum resin combination is a combination of C5 petroleum resin and hydrogenated petroleum resin with a content-to-mass ratio of 1:1.3-1.

5.

8. The composition according to claim 7, characterized in that, The styrene-butadiene-styrene block copolymer has a star-shaped molecular structure, an average molecular weight of 200,000-320,000 g / mol, and a density of 0.93-0.95 g / cm³. 3 The styrene content is 30-32 wt%.

9. The composition of claim 8, wherein, The styrene-isoprene-styrene block copolymer has a linear molecular structure, a melt flow rate of 8-12 g / 10 min, a tensile strength ≥12 MPa, and a viscosity of 1100-1600 mpa·s for a 25 wt% toluene solution.

10. A method for preparing asphalt waterproof membrane, characterized in that, The method includes: sequentially performing melt blending and calendering on a mixture containing the composition according to any one of claims 1-9 to obtain the asphalt waterproof membrane.

11. The method of claim 10, wherein, The method also includes: (1) The first mixture containing asphalt composite and naphthenic oil is first mixed to obtain material I; (2) The modifier is mixed with material I for the second time to obtain material II; (3) The petroleum resin mixture, additives and material II are mixed for the third time to obtain material III; (4) The material III is subjected to calendering and molding to obtain the asphalt waterproof membrane.

12. The method of claim 11, wherein, In step (1), the conditions for the first mixing include: a temperature of 170-180℃ and a time of 0.1-2h; And / or, in step (2), the conditions for the second mixing include: a temperature of 180-185°C and a time of 1-2 hours; And / or, the conditions for the third mixing include: a temperature of 165-185°C and a time of 1-2 hours.

13. A bituminous waterproof membrane prepared by the method according to any one of claims 10-12.

14. The application of the bituminous waterproof membrane according to claim 13 in building waterproofing.

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