Modified asphalt mastic composition, modified asphalt mastic, preparation method and application of modified asphalt mastic, asphalt waterproof coiled material and application of asphalt waterproof coiled material

Abstract

The invention relates to the field of building waterproof materials, and discloses a modified asphalt mastic composition, modified asphalt mastic, a preparation method and application of the modified asphalt mastic, an asphalt waterproof coiled material and application of the asphalt waterproof coiled material. The modified asphalt mastic composition contains a main agent and an auxiliary agent, wherein the main agent comprises matrix asphalt, vacuum glass beads, a composite flame retardant and a cross-linking agent; based on 100 parts by weight of the total weight of the composition, the content of the matrix asphalt is 35-50 parts by weight, the content of the vacuum glass beads is 5-8 parts by weight, the content of the composite flame retardant is 5-10 parts by weight, and the content of the cross-linking agent is 0.3-1.5 parts by weight. The asphalt waterproof coiled material provided by the invention has excellent sound insulation performance, fireproof performance, insulating performance, environmental protection performance, bonding performance, weather resistance and construction convenience.

Description

Technical Field

[0001] This invention relates to the field of building waterproofing materials, specifically to a modified bitumen adhesive composition, a modified bitumen adhesive and its preparation method and application, and bitumen waterproofing membranes and their applications. Background Technology

[0002] Waterproof membrane is a flexible waterproofing material used in building walls, roofs, tunnels, highways, and other areas. It can be rolled up and is primarily used to resist external rainwater and groundwater seepage, serving as the first line of defense in waterproofing projects. Waterproof membranes can be divided into three main categories: asphalt-based, polymer-based (such as synthetic rubber and resin-based), and self-adhesive-based.

[0003] Asphalt-based waterproof membranes are one of the most widely used basic materials in building waterproofing projects. Due to their excellent waterproof performance, aging resistance, and bonding strength, they play an important role in projects such as roofing and basement waterproofing. However, with the continuous improvement of building functional requirements, especially in places such as residences, hospitals, and hotels where the requirements for indoor environmental safety and comfort are extremely high, the limitations of traditional waterproof membranes are becoming increasingly apparent.

[0004] On the one hand, traditional roofing membranes primarily focus on waterproofing, with their material and structural design not adequately considering sound insulation needs. They lack effective damping, vibration reduction, and sound absorption properties, resulting in very limited effectiveness in isolating impact noise from floor slabs. On the other hand, ordinary asphalt materials are inherently flammable, posing potential fire safety hazards and failing to meet the stringent flame-retardant requirements for interior decoration materials. Therefore, current building construction typically requires separate waterproofing, sound insulation, and fireproofing layers, leading to complex procedures, increased costs, and the risk of compatibility issues with multiple materials.

[0005] CN113388336A discloses a TPO thermoplastic polyolefin polymer non-asphalt-based self-adhesive waterproof membrane and its preparation method. This method uses a polyester fabric with a triangular mesh structure possessing excellent tensile and tear strength as a reinforcing layer, giving the waterproof membrane stronger tear resistance and impact resistance. Furthermore, it determines that polypropylene and ethylene propylene rubber are mechanically melt-blended under stable temperature control and strictly according to the specified proportions, significantly improving the thermal stability of the waterproof membrane. However, the waterproof membrane prepared by this method has poor sound insulation performance.

[0006] CN107641327A discloses a sound-insulating modified bitumen waterproof membrane and its preparation method. This method uses modified bitumen, EPDM rubber, silane coupling agent, asbestos fiber, carbon fiber, vulcanizing agent, antioxidant, and filler as raw materials to produce a waterproof membrane with good sound insulation performance, as well as advantages such as high strength, high elongation at break, and good waterproof performance. However, the waterproof membrane prepared by this method does not possess excellent fire resistance.

[0007] Therefore, in the face of the development trend of green building and high-quality living environment, there is an urgent need to develop a comprehensive material that integrates high-efficiency waterproofing, high-level sound insulation, excellent fire resistance, and meets environmental protection requirements. Summary of the Invention

[0008] The purpose of this invention is to overcome the problem that existing waterproof membranes cannot simultaneously achieve sound insulation, fire resistance, weather resistance, and environmental protection performance.

[0009] To achieve the above objectives, a first aspect of the present invention provides a modified asphalt adhesive composition containing a main agent and an auxiliary agent, wherein the main agent includes base asphalt, vacuum glass microspheres, a composite flame retardant, and a crosslinking agent; Based on 100 parts by weight of the total composition, the content of the base bitumen is 35-50 parts by weight, the content of the vacuum glass microspheres is 5-8 parts by weight, the content of the composite flame retardant is 5-10 parts by weight, and the content of the crosslinking agent is 0.3-1.5 parts by weight. The vacuum glass microspheres have an average particle size of 20-250 μm and a bulk density of 0.1-0.4 g / cm³. 3 ; The composite flame retardant contains a nitrogen-based organic flame retardant and an inorganic flame retardant in a mass ratio of 1:3-5; the nitrogen-based organic flame retardant is a melamine derivative. The crosslinking agent is a dialkyl peroxide.

[0010] A second aspect of the present invention provides a method for preparing modified asphalt adhesive, the method comprising using the components of the composition described in the first aspect above, including: S1: The base asphalt and plasticizer are mixed in the first step to obtain mixture I; S2: Mix the mixture I, compatibilizer, and toughening agent in a second mixing process to obtain mixture II; S3: Mix the mixture II, vacuum glass microspheres, and filler in a third mixing process to obtain mixture III; S4: Mix the mixture III, the thickener, and the crosslinking agent in a fourth mixing process to obtain mixture IV; S5: Mix the mixture IV and the composite flame retardant in a fifth mixing process to obtain the modified asphalt adhesive.

[0011] A third aspect of the present invention provides a modified bitumen adhesive prepared by the method described in the second aspect above.

[0012] A fourth aspect of the present invention provides the application of the modified bitumen adhesive described in the third aspect above in the preparation of bitumen waterproof membranes.

[0013] The fifth aspect of the present invention provides an asphalt waterproof membrane, which includes a matrix, a modified asphalt layer, a sound insulation layer, an adhesive layer, and a release film; The material forming the modified asphalt layer contains the modified asphalt adhesive described in the third aspect above.

[0014] The sixth aspect of the present invention provides the application of the bitumen waterproof membrane described in the fifth aspect above in building waterproofing.

[0015] Through the above technical solution, the present invention has at least the following advantages: (1) The asphalt waterproof membrane provided by the present invention has excellent sound insulation and fire resistance, which can significantly improve the safety level of buildings and the living comfort of residents.

[0016] (2) The asphalt waterproof membrane provided by the present invention has excellent adhesion and weather resistance, which can significantly improve the tensile strength and tear resistance of the waterproof membrane and greatly reduce the risk of deformation.

[0017] (3) The asphalt waterproof membrane provided by the present invention uses a pressure-sensitive hot melt adhesive layer and can be directly laid during construction, which is both environmentally friendly and convenient to construct. 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] The particle size mentioned in this invention refers to the average diameter of the particles.

[0020] As mentioned above, a first aspect of the present invention provides a modified asphalt adhesive composition containing a main agent and an auxiliary agent, wherein the main agent includes base asphalt, vacuum glass microspheres, a composite flame retardant, and a crosslinking agent; Based on 100 parts by weight of the total composition, the content of the base bitumen is 35-50 parts by weight, the content of the vacuum glass microspheres is 5-8 parts by weight, the content of the composite flame retardant is 5-10 parts by weight, and the content of the crosslinking agent is 0.3-1.5 parts by weight. The vacuum glass microspheres have an average particle size of 20-250 μm and a bulk density of 0.1-0.4 g / cm³. 3 The composite flame retardant contains nitrogen-based organic flame retardant and inorganic flame retardant in a mass ratio of 1:3-5; the nitrogen-based organic flame retardant is a melamine derivative; and the crosslinking agent is a dialkyl peroxide.

[0021] Preferably, the vacuum glass microspheres have an average particle size of 100-180 μm and a bulk density of 0.1-0.3 g / cm³. 3 .

[0022] Preferably, in the composite flame retardant, the melamine derivative is selected from at least one of melamine cyanurate and melamine cyanophosphate.

[0023] Preferably, in the composite flame retardant, the inorganic flame retardant is selected from at least one of aluminum hydroxide, zinc borate, and antimony trioxide. More preferably, the inorganic flame retardant is selected from aluminum hydroxide and / or zinc borate. Even more preferably, the inorganic flame retardant is aluminum hydroxide and zinc borate, and the mass ratio of aluminum hydroxide to zinc borate is 5:2-4.

[0024] More preferably, in the crosslinking agent, the dialkyl peroxide is selected from at least one of DCP and BIPB.

[0025] Preferably, in the composition, the additives include tackifiers, toughening agents, compatibilizers, plasticizers, and fillers; Based on 100 parts by weight of the total composition, the content of the tackifier is 8-10 parts by weight, the content of the toughening agent is 3-5 parts by weight, the content of the compatibilizer is 5-6 parts by weight, the content of the plasticizer is 5-6 parts by weight, and the content of the filler is 3.5-33.7 parts by weight.

[0026] Preferably, the base asphalt is petroleum asphalt. More preferably, the base asphalt has a softening point of 30-50℃, an elongation of ≥100 cm at 15℃, and a penetration of 60-80 0.1 mm segments at 25℃. Even more preferably, the base asphalt has a softening point of 40-48℃, an elongation of ≥120 cm at 15℃, and a penetration of 65-80 0.1 mm segments at 25℃.

[0027] Preferably, the tackifier is a benzene-free tackifier. More preferably, the benzene-free tackifier is selected from at least one of hydrogenated rosin, terpene resin, and ketone-aldehyde resin.

[0028] Preferably, the toughening agent is selected from at least one of styrene-butadiene rubber, ethylene propylene rubber, and nitrile rubber.

[0029] More preferably, the compatibilizer is selected from at least one of styrene-butadiene-styrene block copolymer grafted with maleic anhydride, polyethylene grafted with maleic anhydride, and ethylene-vinyl acetate copolymer grafted with maleic anhydride. More preferably, the compatibilizer is styrene-butadiene-styrene block copolymer grafted with maleic anhydride. More preferably, the grafting rate of the styrene-butadiene-styrene block copolymer grafted with maleic anhydride is 0.5-2 wt%, and the content of the structural units provided by styrene is 20-40 wt%.

[0030] Preferably, the plasticizer is a bio-based plasticizer. More preferably, the bio-based plasticizer is selected from at least one of epoxidized soybean oil, epoxidized linseed oil, and epoxidized castor oil. Even more preferably, the bio-based plasticizer is epoxidized soybean oil. Even more preferably, the epoxidized soybean oil has a flash point of ≥220℃.

[0031] More preferably, the filler is selected from at least one of talc, nano-silica, and calcium carbonate. More preferably, the filler is talc. Even more preferably, the average particle size of the talc is 5-50 μm.

[0032] As previously stated, a second aspect of the present invention provides a method for preparing modified bitumen adhesive, the method comprising using the components of the composition described in the first aspect, including: S1: The base asphalt and plasticizer are mixed in the first step to obtain mixture I; S2: Mix the mixture I, compatibilizer, and toughening agent in a second mixing process to obtain mixture II; S3: Mix the mixture II, vacuum glass microspheres, and filler in a third mixing process to obtain mixture III; S4: Mix the mixture III, the thickener, and the crosslinking agent in a fourth mixing process to obtain mixture IV; S5: Mix the mixture IV and the composite flame retardant in a fifth mixing process to obtain the modified asphalt adhesive.

[0033] According to one specific implementation, in step S1, the conditions for the first mixing include: a temperature of 150-170°C, a time of 15-25 min, and a rotation speed of 1200-1500 rpm.

[0034] According to a preferred embodiment, in step S2, the conditions for the second mixing include: a temperature of 150-170°C, a time of 30-50 min, and a rotation speed of 1200-1500 rpm.

[0035] According to one specific implementation, in step S3, the conditions for the third mixing include: a temperature of 180-190°C, a time of 160-200 min, and a rotation speed of 1200-1500 rpm.

[0036] According to a preferred embodiment, in step S4, the conditions for the fourth mixing include: a temperature of 180-190°C, a time of 20-40 min, and a rotation speed of 1200-1500 rpm.

[0037] According to one specific implementation, in step S5, the conditions for the fifth mixing include: a temperature of 180-190°C, a time of 40-60 min, and a rotation speed of 1200-1500 rpm.

[0038] As previously stated, a third aspect of the present invention provides a modified bitumen adhesive prepared by the method described in the second aspect above.

[0039] As previously stated, the fourth aspect of the present invention provides the application of the modified bitumen adhesive described in the third aspect above in the preparation of bitumen waterproof membranes.

[0040] As mentioned above, the fifth aspect of the present invention provides an asphalt waterproof membrane, which includes a matrix, a modified asphalt layer, a sound insulation layer, an adhesive layer, and a release film. The material forming the modified asphalt layer contains the modified asphalt adhesive described in the third aspect above.

[0041] Preferably, the sound insulation layer is a foamed film sound insulation layer, and the forming material of the foamed film sound insulation layer contains MPP foamed film. More preferably, the density of the MPP foamed film is 0.05-0.15 g / cm³. 3 Thermal conductivity (W / m·k) ≤ 0.1, insulation resistance (MΩ) ≥ 300, volume resistivity (Ω·cm) ≥ 10 13 .

[0042] More preferably, the adhesive layer is a hot-melt pressure-sensitive adhesive. Even more preferably, the hot-melt pressure-sensitive adhesive has a bond strength ≥3.3 N / mm to the post-cast concrete and a softening point ≥73℃.

[0043] More preferably, the matrix is ​​a polyester base fabric. More preferably, the basis weight of the polyester base fabric is ≥300 g / m². 2 For example, the thickness of the polyester base fabric is 1.3 mm.

[0044] Preferably, the separator is a PE silicone oil separator.

[0045] According to a preferred embodiment, the method for preparing the asphalt waterproof membrane includes the following steps: (1) The dried matrix was impregnated and extruded in a solution of 70# asphalt, 10# asphalt and PP wax in a mass ratio of 4-5:4-5:1 to obtain intermediate I; (2) The modified asphalt adhesive is coated on the upper and lower surfaces of intermediate I to obtain intermediate II; (3) Apply an adhesive layer to the upper surface of intermediate II to obtain intermediate III; (4) Cover the lower surface of intermediate III with the sound insulation layer to obtain intermediate IV; (5) After the intermediate IV is cooled in a water tank, the release film is placed on its upper surface, and after compaction, cooling, trimming and rolling, the asphalt waterproof membrane is obtained. The cooling temperature of the water tank is 30-40℃.

[0046] The present invention does not have any special requirements for the specific operation of the drying treatment and the impregnation. Those skilled in the art can carry out the operation according to the known technical means in the art. The present invention will not elaborate further here, and those skilled in the art should not understand it as a limitation of the present invention.

[0047] As previously stated, the sixth aspect of the present invention provides the application of the bitumen waterproof membrane described in the fifth aspect in building waterproofing.

[0048] The present invention will be described in detail below through examples. In the following examples, unless otherwise specified, all instruments and raw materials used are commercially available products.

[0049] Petroleum asphalt: Purchased from Maoming Branch of China Petroleum & Chemical Corporation, grade 70# road petroleum asphalt. The softening point of this petroleum asphalt is 45℃, the elongation at 15℃ is 130 cm, and the penetration at 25℃ is 76 x 0.1 mm. Vacuum glass microspheres I: Purchased from Fuxin Environmental Protection Insulation Building Materials Factory, Pingqiao District, Xinyang City; average particle size 170 μm, bulk density 0.17 g / cm³. 3 ; Vacuum glass microspheres II: purchased from Zhuoye Mineral Products Processing Plant in Lingshou County, with an average particle size of 45 μm and a bulk density of 0.32 g / cm³. 3 ; Vacuum glass microspheres III: purchased from Lingshou County Yehui Mineral Products Co., Ltd., with an average particle size of 13 μm and a bulk density of 0.4 g / cm³. 3 ; Melamine cyanurate: a melamine derivative, purchased from Wuxi Mingri Chemical Technology Co., Ltd., brand name MCA; Melamine cyanophosphate: a melamine derivative, purchased from Guangzhou Yinyuan New Material Co., Ltd., brand name FR-MPP200; Melamine hydrobromide: a melamine derivative, purchased from Hubei Biaoyue Biotechnology Development Co., Ltd., brand name Biaoyue Biotechnology MHB; Poly(acrylonitrile-co-methyl acrylate): a non-melamine derivative, purchased from Shanghai Yuanye Biotechnology Co., Ltd., brand name Yuanye; Dicumyl peroxide (DCP): a dialkyl peroxide, purchased from Hubei Xinghengye Technology Co., Ltd. BIPB (Di-tert-butylperoxyisopropylbenzene): a dialkyl peroxide, purchased from Wenzhou Shoucheng Chemical Technology Co., Ltd. 2,5-Dimethyl-2,5-bis(tert-butylperoxide)hexane DHBP: a dialkyl peroxide, purchased from Guangzhou Zhongxiang Trading Co., Ltd., brand name Qiangsheng Enox; Zinc oxide: purchased from Shijiazhuang Dayuan Chemical Co., Ltd., brand name Dayuan Chemical, purity ≥99%; Hydrogenated rosin: purchased from Henan Wanshan New Material Technology Co., Ltd.; Styrene-butadiene rubber: purchased from Shandong Haifang Rubber Technology Co., Ltd., grade HK-B01; Styrene-butadiene-styrene block copolymer grafted with maleic anhydride: purchased from Dongguan Shenghao Plastic Raw Materials Co., Ltd., brand name Shenghao Plastic, grafting rate 1wt%, styrene provided structural units content 30wt%; Epoxidized soybean oil: purchased from Changzhou Senlang Chemical Co., Ltd., flash point is 220-260℃; Talc powder: purchased from Lingshou Yongqi Mineral Products Co., Ltd., with an average particle size of 10 μm; Polyester base fabric: purchased from Shouguang Fada Textile Co., Ltd., with a basis weight of 305-350 g / m². 2 The thickness is 1.3mm; 70# asphalt: purchased from Shandong Jingbo Petrochemical Co., Ltd., penetration (25℃, 5s, 100 g), 0.1 mm is 60-80; 10# Asphalt: Purchased from Handan Longming Chemical Technology Co., Ltd., with a softening point of 90-130℃; PP wax: purchased from Jining Fangyu Chemical Co., Ltd., grade PPW-0960, softening point 130-155℃; Hot melt pressure-sensitive adhesive: Purchased from Foshan Jia Hongjian Plastic Products Co., Ltd., grade A pressure-sensitive hot melt adhesive. The bonding strength between this pressure-sensitive hot melt adhesive and the post-poured concrete is 3.3 N / mm, and the softening point is 73-85℃. MPP foam film: Purchased from Ningbo Zhiwei New Material Technology Co., Ltd., grade MPP10. This MPP foam film has a density of 0.09±0.01 g / cm³, a thickness of 1.5 mm, a thermal conductivity (W / m·k) ≤0.05, a flame retardant rating of HF-1, an insulation resistance (MΩ) ≥500 Ω·cm, and a volume resistivity (Ω·cm) ≥10. 13 ; PE silicone oil release film: purchased from Shanghai Youpus Materials Technology Co., Ltd., brand name F901 anti-stick film, single-sided silicone coating.

[0050] In the following preparation examples, the total weight of the modified bitumen composition is 1000 g.

[0051] Preparation Example 1 The preparation method of modified asphalt adhesive is as follows, and the specific types and amounts of components are shown in Table 1.

[0052] S1: At 160℃, petroleum asphalt and epoxidized soybean oil were mixed for 20 min, with the rotation speed controlled at 1400 rpm, to obtain mixture I; S2: Keep the temperature at 160℃, mix the above mixture I, styrene-butadiene-styrene block copolymer grafted with maleic anhydride and styrene-butadiene rubber for 40 min, and control the rotation speed at 1400 rpm to obtain mixture II; S3: Increase the temperature to 185℃, mix the above mixture II, vacuum glass microspheres and talc powder for 180 min, and control the rotation speed at 1400 rpm to obtain mixture III; S4: Keep the temperature at 185℃, mix the above mixture III, hydrogenated rosin and crosslinking agent for 30 min, and control the rotation speed at 1400 rpm to obtain mixture IV; S5: Keep the temperature at 185℃, mix the above mixture IV, nitrogen-based organic flame retardant, aluminum hydroxide and zinc borate for 50 min, and control the rotation speed at 1400 rpm to prepare the modified asphalt adhesive.

[0053] Preparation Examples 2 to 5 The modified asphalt adhesive was prepared using a similar process to that used in Preparation Example 1, except that the types and amounts of each component were different, as detailed in Table 1.

[0054] Comparative Preparation Examples 1 to 3 The modified asphalt adhesive was prepared using a similar process to that used in Preparation Example 1, except that the types and amounts of each component were different, as detailed in Table 1.

[0055] Table 1

[0056] Table 1 (continued)

[0057] Example 1 The preparation method of asphalt waterproof membrane is as follows: (1) The dried polyester base fabric is transported to the prepreg tank by rollers and impregnated for 10 seconds. The excess prepreg is squeezed out by the extrusion roller to obtain intermediate I. The prepreg tank contains a mixture of 70# asphalt, 10# asphalt and PP wax in a weight ratio of 4.5:4.5:1. (2) The above intermediate I is further fed to the discharge port of the modified asphalt adhesive A1 provided in the present invention. There are two rollers with a spacing of 4 mm in front of the discharge port. The modified asphalt adhesive A1 and intermediate I are compressed to obtain intermediate II. (3) The above intermediate II is continued to be conveyed to the discharge port of the hot melt pressure sensitive adhesive. There is an upper roller in front of the discharge port to compress the hot melt pressure sensitive adhesive and intermediate II to obtain intermediate III. (4) Cover the lower surface of the above intermediate III with MPP foam film to obtain intermediate IV; (5) After the above intermediate IV is cooled in a water tank, a PE silicone oil release film is placed on its upper surface, and after compaction, cooling, trimming and rolling, the asphalt waterproof membrane is obtained. The cooling temperature of the water tank is 35°C.

[0058] Examples 2 to 5 The process was carried out under similar conditions to that of Example 1, except that: In Example 2, modified asphalt adhesive A2 was used to replace modified asphalt adhesive A1 in Example 1; In Example 3, modified asphalt adhesive A3 was used to replace modified asphalt adhesive A1 in Example 1; In Example 4, modified bitumen adhesive A4 was used to replace modified bitumen adhesive A1 in Example 1; In Example 5, modified asphalt adhesive A5 was used to replace modified asphalt adhesive A1 in Example 1.

[0059] Comparative Examples 1 to 3 The process was carried out under similar conditions to that of Example 1, except that: In Comparative Example 1, modified bituminous adhesive D-A1 was used to replace modified bituminous adhesive A1 in Example 1; In Comparative Example 2, modified bitumen adhesive D-A2 was used to replace modified bitumen adhesive A1 in Example 1; In Comparative Example 3, modified bitumen adhesive D-A3 was used to replace modified bitumen adhesive A1 in Example 1.

[0060] Test case Sound insulation performance: The sound insulation performance of asphalt waterproof membrane was tested according to the national standard GB / T 19889.3. Fire resistance performance: The fire resistance performance of asphalt waterproof membrane was tested according to the national standard GB / 8624-2012. Adhesion performance: The adhesion performance between asphalt waterproof membrane and cement mortar was tested according to the national standard GB / T35467-2017. Untreated low-temperature flexibility: The untreated low-temperature flexibility of asphalt waterproof membrane and cement mortar was tested according to the national standard GB / T35467-2017. Low-temperature flexibility after light aging: The asphalt waterproof membrane was aged with a xenon lamp for 30 days, and then the low-temperature flexibility after light aging was tested according to the national standard GB / T35467-2017. Tensile strength: The tensile strength of bituminous waterproof membrane was tested according to the national standard GB18242-2008, and the unit is N / 50 mm. Heat aging mass loss: The heat aging mass loss of asphalt waterproof membrane was tested according to the national standard GB18242-2008. Heat aging resistance: The asphalt waterproof membrane was heat-treated at 80℃ for 10 days in accordance with the national standard GB18242-2008 to test its heat aging resistance. Volume resistivity: The volume resistivity of asphalt waterproof membrane was tested according to GB / T31838.5-2021.

[0061] The performance of the bituminous waterproof membranes prepared in the examples and comparative examples was tested using the aforementioned test methods. The specific test results are shown in Table 2.

[0062] Table 2

[0063] As can be seen from the above results, the asphalt waterproof membrane prepared using the method of the present invention has superior sound insulation, fire resistance, insulation, environmental protection, adhesion, weather resistance and ease of construction.

[0064] Specifically, the asphalt waterproof membrane provided in this embodiment of the invention has the following properties: sound insulation ≥29 dB, fire resistance rating not lower than flat B2E, bonding strength to cement-based surfaces ≥3.0 N / mm, low-temperature flexibility without treatment ≤-30℃, low-temperature flexibility after light aging ≤-19℃, maximum tensile strength ≥1300 N, heat aging mass loss of 0.14-0.16%, maximum tensile strength retention rate after heat aging ≥95%, and volume resistivity ≥6.4×10⁻⁶. 12 Ω·cm.

[0065] Therefore, compared with the prior art, the asphalt waterproof membrane provided by the present invention has better overall performance.

[0066] 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 combining the 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 modified asphalt adhesive composition, characterized in that, The composition contains a main agent and an auxiliary agent, wherein the main agent includes base asphalt, vacuum glass microspheres, composite flame retardant, and crosslinking agent; Based on 100 parts by weight of the total composition, the content of the base bitumen is 35-50 parts by weight, the content of the vacuum glass microspheres is 5-8 parts by weight, the content of the composite flame retardant is 5-10 parts by weight, and the content of the crosslinking agent is 0.3-1.5 parts by weight. The vacuum glass microspheres have an average particle size of 20-250 μm and a bulk density of 0.1-0.4 g / cm³. 3 ; The composite flame retardant contains a nitrogen-based organic flame retardant and an inorganic flame retardant in a mass ratio of 1:3-5; the nitrogen-based organic flame retardant is a melamine derivative. The crosslinking agent is a dialkyl peroxide.

2. The composition according to claim 1, characterized in that, The vacuum glass microspheres have an average particle size of 100-180 μm and a bulk density of 0.1-0.3 g / cm³. 3 ; And / or, in the composite flame retardant, the melamine derivative is selected from at least one of melamine cyanurate and melamine cyanophosphate; And / or, in the composite flame retardant, the inorganic flame retardant is selected from at least one of aluminum hydroxide, zinc borate, and antimony trioxide; And / or, in the crosslinking agent, the dialkyl peroxide is selected from at least one of DCP and BIPB.

3. The composition according to claim 1 or 2, characterized in that, The additives include tackifiers, toughening agents, compatibilizers, plasticizers, and fillers; Based on 100 parts by weight of the total composition, the content of the tackifier is 8-10 parts by weight, the content of the toughening agent is 3-5 parts by weight, the content of the compatibilizer is 5-6 parts by weight, the content of the plasticizer is 5-6 parts by weight, and the content of the filler is 3.5-33.7 parts by weight.

4. The composition according to claim 1 or 2, characterized in that, The base asphalt is petroleum asphalt; And / or, the softening point of the base bitumen is 30-50℃, the elongation at 15℃ is ≥100 cm, and the penetration at 25℃ is 60-80 0.1 mm.

5. A method for preparing modified asphalt adhesive, characterized in that, This method is performed using any of the components in the composition according to any one of claims 1-4, comprising: S1: The base asphalt and plasticizer are mixed in the first step to obtain mixture I; S2: Mix the mixture I, compatibilizer, and toughening agent in a second mixing process to obtain mixture II; S3: Mix the mixture II, vacuum glass microspheres, and filler in a third mixing process to obtain mixture III; S4: Mix the mixture III, the thickener, and the crosslinking agent in a fourth mixing process to obtain mixture IV; S5: Mix the mixture IV and the composite flame retardant in a fifth mixing process to obtain the modified asphalt adhesive.

6. The modified bitumen adhesive prepared by the method of claim 5.

7. The application of the modified bitumen adhesive according to claim 6 in the preparation of bitumen waterproof membrane.

8. A bituminous waterproof membrane, characterized in that, The asphalt waterproof membrane includes a matrix, a modified asphalt layer, a sound insulation layer, an adhesive layer, and a release liner; The material forming the modified asphalt layer contains the modified asphalt adhesive as described in claim 7.

9. The bituminous waterproof membrane according to claim 8, characterized in that, The sound insulation layer is a foamed film sound insulation layer, and the forming material of the foamed film sound insulation layer contains MPP foamed film; And / or, the adhesive layer is made of hot melt pressure-sensitive adhesive.

10. The application of the bituminous waterproof membrane according to claim 8 or 9 in building waterproofing.

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