Multi-layer self-protection self-adhesion waterproof coiled material and preparation method thereof

Abstract

The invention relates to the technical field of building waterproof materials, and provides a multi-layer self-protection self-adhesion waterproof roll and a preparation method thereof. The multi-layer self-protection self-adhesion waterproof roll sequentially comprises an isolating membrane, a self-adhesion glue layer, an elastic polyester felt buffer layer, an adhesive layer and a polymeric membrane layer from top to bottom, and the self-adhesion glue layer is prepared from, by weight, 65-75 parts of butyl rubber, 15-20 parts of SBS modifier, 8-12 parts of tackifying resin I, 0.5-1.5 parts of anti-aging agent, 8-15 parts of filler, 1-3 parts of polyethylene and 1-2 parts of flexibilizer. The tackifying resin I comprises rosin resin. According to the technical scheme, the problems that the self-adhesive waterproof roll does not have the self-protection capability, the peel strength is low and the holding power is poor in the prior art are solved.

Description

Technical Field

[0001] The invention relates to the technical field of building waterproof materials, and in particular to a multi-layer self-protective self-adhesive waterproof coiled material and a preparation method thereof. Background Art

[0002] As a key material for modern building waterproofing projects, waterproof membranes are widely used in roofs, underground, bridges, tunnels and many other fields with strict waterproofing requirements. They aim to build a stable and long-lasting waterproof barrier to resist the invasion of external water and ensure the durability of the building structure and the normal use of the internal space.

[0003] There are various types of traditional waterproof membranes, among which self-adhesive waterproof membranes occupy a certain market share due to their advantages such as convenient construction and no need for additional heating and bonding. However, the current conventional self-adhesive waterproof membranes have many technical shortcomings that need to be overcome. On the one hand, the self-protection ability of the self-adhesive membrane layer is poor. Under the complex and changeable working conditions of transportation, storage and construction site, it is very easy to be hit and scratched by external forces, causing damage to the surface of the membrane and the destruction of its integrity, burying the hidden danger of waterproof failure. On the other hand, its performance in adapting to base deformation is unsatisfactory. When faced with deformation of the building base caused by settlement, expansion and contraction, vibration, etc., there is a zero extension tearing phenomenon, and it is difficult to deform in coordination with the base. Once cracks appear, water can easily take the opportunity to penetrate and destroy the waterproof system.

[0004] At the level of self-adhesive, the commonly used asphalt-based adhesive layer has obvious drawbacks. Compared with the polymer self-adhesive layer, its adhesive strength is limited, and it is difficult to build a high-strength and durable bond between the roll and the waterproof base, resulting in an unstable bond between the roll and the base, which is easy to debond and brings serious safety hazards. Therefore, it is necessary to develop a self-adhesive waterproof roll with high peel strength and long-lasting adhesion that has self-protection capabilities. Summary of the invention

[0005] The present invention provides a multi-layer self-protection self-adhesive waterproof coiled material and a preparation method thereof, which solves the problems in the related art that the self-adhesive waterproof coiled material has no self-protection ability, low peeling strength and poor adhesion.

[0006] The technical solution of the present invention is as follows: The present invention proposes a multi-layer self-protection self-adhesive waterproof coiled material, which comprises, from top to bottom, an isolation film, a self-adhesive layer, an elastic polyester felt buffer layer, an adhesive layer and a polymer film layer, wherein the self-adhesive layer comprises the following component raw materials in parts by weight: 65 to 75 parts of butyl rubber, 15 to 20 parts of SBS modifier, 8 to 12 parts of tackifying resin I, 0.5 to 1.5 parts of antioxidant, 8 to 15 parts of filler, 1 to 3 parts of polyethylene, and 1 to 2 parts of toughening agent, wherein the tackifying resin I comprises rosin resin.

[0007] As a further technical solution, the tackifying resin I also includes phenolic resin and petroleum resin, and the mass ratio of the rosin resin, phenolic resin and petroleum resin is 3:5~6:1.

[0008] In the present invention, rosin resin, phenolic resin and petroleum resin are added to the self-adhesive layer at the same time as tackifying resin I to exert the synergistic effect of the three, and the amount of phenolic resin is limited to be greater than that of rosin resin, which can further enhance the bonding strength between the self-adhesive layer and the surface to be laminated, and further improve the peel strength and adhesion of the self-adhesive waterproof membrane.

[0009] As a further technical solution, the antioxidant consists of an antioxidant and a UV absorber in a mass ratio of 5:2, the antioxidant includes one or more of antioxidant 1010, antioxidant 300, and antioxidant 264, and the UV absorber is Tinuvin 326.

[0010] As a further technical solution, the filler includes one or more of calcium carbonate, talc, and kaolin.

[0011] As a further technical solution, the toughening agent is ELVALOY toughening agent.

[0012] As a further technical solution, the adhesive layer includes the following component raw materials in parts by weight: 70-80 parts of asphalt, 3-9 parts of SIS rubber, 2-5 parts of SEBS rubber, 3-9 parts of SBR rubber, 5-8 parts of tackifying resin II, 10-20 parts of talc, 5-15 parts of calcium carbonate, and 1-3 parts of composite antioxidant.

[0013] As a further technical solution, the tackifying resin II is composed of rosin resin, phenolic resin and petroleum resin in a mass ratio of 3 to 4:1:4.

[0014] In the present invention, rosin resin, phenolic resin and petroleum resin are added to the adhesive layer at the same time as tackifying resin II to exert the synergistic effect of the three, and the amount of rosin resin is limited to be greater than that of phenolic resin, so as to further enhance the intermolecular force with the polyethylene material in the polymer film layer and further improve the peel strength and adhesion of the self-adhesive waterproof membrane.

[0015] As a further technical solution, the composite antioxidant is composed of antioxidant 1010 and sulfurized phenol compound in a mass ratio of 1:1.

[0016] As a further technical solution, the sulfurized phenol compound includes one or more of 4,4'-thiobis(6-tert-butyl-m-cresol), 2,2'-thiobis(4-methyl-6-tert-butylphenol), and 4,4'-thiobis(3-methyl-6-tert-butylphenol).

[0017] The present invention also proposes a method for preparing a multi-layer self-protective self-adhesive waterproof membrane, comprising the following steps: S1. After the raw materials of the self-adhesive layer are mixed, the self-adhesive layer is extruded; S2, compounding an isolation film on the upper side of the self-adhesive layer and a composite buffer layer on the lower side to obtain a semi-finished self-adhesive waterproof membrane; S3, coating the adhesive layer material on the polymer film layer to form an adhesive layer; S4, after laminating the buffer layer and the adhesive layer of the semi-finished self-adhesive waterproof membrane, a self-adhesive waterproof membrane is obtained.

[0018] As a further technical solution, the preparation method of the self-adhesive layer material comprises the following steps: after softening the butyl rubber, adding the SBS modifier and the tackifying resin I in sequence for the first mixing, then adding the antioxidant for the second mixing, adding the filler for the third mixing, adding the polyethylene for the fourth mixing, adding the toughening agent for the fifth mixing, performing a homogenization reaction, cooling and discharging the material, and obtaining the self-adhesive layer material.

[0019] As a further technical solution, the softening temperature is 120-130° C., the softening time is 15-20 min, and the stirring speed during softening is 30-40 rpm.

[0020] As a further technical solution, the temperature of the first mixing is 140-150°C, the stirring speed during the first mixing is 40-50 rpm, the tackifying resin I is added in three times, and the total time of the three additions is 15-20 minutes.

[0021] As a further technical solution, the temperature of the second mixing is 150-155° C., and the time of the second mixing is 10 minutes.

[0022] As a further technical solution, the temperature of the third mixing is 150-155° C., the filler is added in three times, each time with an interval of 5 minutes, and the stirring speed when adding the filler is 50-60 rpm.

[0023] As a further technical solution, the temperature of the fourth mixing is 155-160° C., and the time of the fourth mixing is 15 minutes.

[0024] As a further technical solution, the temperature of the fifth mixing is 160-165° C., the time of the fifth mixing is 20-25 min, and the stirring speed during the fifth mixing is 40-50 rpm.

[0025] As a further technical solution, the temperature of the homogenization reaction is 170-175° C., the time of the homogenization reaction is 20 min, and the speed of the homogenization reaction is 60-70 rpm.

[0026] As a further technical solution, the cooling temperature is 130-140° C., and the sieve aperture is 100 mesh.

[0027] As a further technical solution, the preparation method of the adhesive layer material includes the following steps: after the asphalt is melted, SIS rubber, SEBS rubber, and SBR rubber are added in sequence for the first mixing, then talcum powder and calcium carbonate are added in sequence for the second mixing, and the remaining other components are added for the third mixing, and then fully homogenized to obtain the adhesive layer material.

[0028] As a further technical solution, the melting temperature is 165-170° C., the melting time is 60 min, and the stirring speed during melting is 30 rpm.

[0029] As a further technical solution, the time interval for adding the SIS rubber, SEBS rubber and SBR rubber is 30 minutes, and the temperature for the first mixing is 170-175°C.

[0030] As a further technical solution, the temperature of the second mixing is 165-170°C.

[0031] As a further technical solution, the temperature of the third mixing is 160-165°C.

[0032] As a further technical solution, the homogenization temperature is 180-185° C., the homogenization time is 60 min, and the stirring speed during homogenization is 30-40 rpm.

[0033] As a further technical solution, the material of the isolation membrane is silicone oil PE, and the thickness is 0.01~0.02mm.

[0034] As a further technical solution, the thickness of the self-adhesive layer is 0.08-0.12 mm.

[0035] As a further technical solution, the thickness of the buffer layer is 0.3-0.5 mm.

[0036] As a further technical solution, the thickness of the adhesive layer is 1.5-2.0 mm.

[0037] As a further technical solution, the material of the polymer film layer is a HDPE laminated cross film with a thickness of 0.02~1.8mm.

[0038] The working principle and beneficial effects of the present invention are: In the present invention, the structural level of the buffer layer is increased to strengthen the self-protection ability. Under external force, the coiled material can use sufficient elastic / plastic deformation to reduce the destructive effect of the external force; the existence of the buffer layer can also greatly enhance the ability of the coiled material to adapt to the deformation of the base surface and prevent the occurrence of zero extension tearing phenomenon. Rosin resin is added to the self-adhesive layer as tackifying resin I, which improves the bonding strength of the self-adhesive layer, thereby enhancing the peel strength and adhesion of the self-adhesive waterproof coiled material. DETAILED DESCRIPTION

[0039] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the following examples and comparative examples: Isolation film: The material is silicone oil PE, the thickness is 0.01mm; Self-adhesive layer: thickness 0.08mm; Buffer layer: The material is elastic polyester felt, model HLH-PET-E, thickness 0.4mm; Adhesive layer: thickness 1.5mm; Polymer film layer: The material is HDPE laminated cross film, model is HDPE-C5110, thickness is 0.02mm; Butyl rubber: model 1751; SBS modifier: model SBS791-H; Rosin resin: model 424#; Phenolic resin: model 2127; Petroleum resin: C9 petroleum resin; Coumarone resin: model 100-110; manufacturer is Shanghai Yuantai Chemical Products Co., Ltd.; Polyethylene: Model: HDPE HTA001; Asphalt: 70# road petroleum asphalt; SIS rubber: model SIS1106; SEBS rubber: model G1652MU; SBR rubber: model 1502; Calcium carbonate: average particle size is 100 mesh; Talc: The average particle size is 80 mesh.

[0041] Example 1 A method for preparing a multi-layer self-protective self-adhesive waterproof membrane comprises the following steps: S1. Weigh 65 parts of butyl rubber, heat to 120°C to soften, stir at 30rpm for 20min, heat to 140°C, add 15 parts of SBS modifier and 8 parts of tackifier resin I in sequence, wherein tackifier resin I is added three times within 20min, perform the first mixing, and the stirring speed during the first mixing is 40rpm. Heat to 150°C, add 0.5 parts of antioxidant, perform the second mixing, and the second mixing time is 10min, then add 8 parts of calcium carbonate, perform the third mixing, calcium carbonate is added three times, each time interval is 5min, and the stirring speed during the third mixing is 50rpm. Heat to 155°C, add 1 part of polyethylene, perform the fourth mixing, and the fourth mixing time is The mixing time is 15min, the temperature is raised to 160°C, 1 part of ELVALOY toughening agent is added, and the fifth mixing is carried out. The fifth mixing time is 25min, the stirring speed during the fifth mixing is 40rpm, the temperature is raised to 170°C, and the mixture is stirred at 60rpm for 20min for homogenization reaction, the temperature is lowered to 130°C, and the mixture is passed through a 100-mesh sieve to obtain a self-adhesive layer material. The self-adhesive layer material is extruded to obtain a self-adhesive layer, wherein the tackifying resin I is a rosin resin, and the antioxidant is composed of an antioxidant 1010 and Tinuvin 326 in a mass ratio of 5:2; S2, compounding an isolation film on the upper side of the self-adhesive layer and a composite buffer layer on the lower side to obtain a semi-finished self-adhesive waterproof membrane; S3, weigh 70 parts of asphalt, heat it to 165°C to melt, stir at 30rpm for 60min, heat it to 170°C, add 3 parts of SIS rubber, 2 parts of SEBS rubber, and 3 parts of SBR rubber in sequence, mix for the first time, the interval time of each rubber is 30min, cool it to 165°C, add 10 parts of talcum powder and 5 parts of calcium carbonate in sequence, mix for the second time, cool it to 160°C, add 5 parts of tackifying resin II and 1 part of composite antioxidant, mix for the third time, heat it to 180°C, stir at 30rpm for 60min, and obtain the adhesive layer material after sufficient homogenization, wherein the tackifying resin II is composed of rosin resin, phenolic resin, and petroleum resin in a mass ratio of 3:1:4, and the composite antioxidant is composed of antioxidant 1010 and 4,4'-thiobis(6-tert-butyl-m-cresol) in a mass ratio of 1:1, and the adhesive layer material is coated on the polymer film layer; S4, after laminating the buffer layer and the adhesive layer of the semi-finished self-adhesive waterproof membrane, a self-adhesive waterproof membrane is obtained.

[0042] Example 2 A method for preparing a multi-layer self-protective self-adhesive waterproof membrane comprises the following steps: S1. Weigh 70 parts of butyl rubber, heat to 125°C to soften, stir at 30rpm for 18min, heat to 145°C, add 18 parts of SBS modifier and 10 parts of tackifier resin I in sequence, wherein tackifier resin I is added three times within 18min, perform the first mixing, and the stirring speed during the first mixing is 45rpm. Heat to 152°C, add 1 part of antioxidant, perform the second mixing, and the second mixing time is 10min. Then add 10 parts of talcum powder, perform the third mixing, and the talcum powder is added three times, each time interval is 5min, and the stirring speed during the third mixing is 55rpm. Heat to 158°C, add 2 parts of polyethylene, perform the fourth mixing, and the fourth mixing time is The mixture was heated to 162°C for 15 minutes, heated to 162°C, 1.5 parts of ELVALOY toughening agent were added, and the fifth mixing was performed. The fifth mixing time was 22 minutes, and the stirring speed during the fifth mixing was 45 rpm. The mixture was heated to 172°C, stirred at 65 rpm for 20 minutes for homogenization reaction, cooled to 135°C, and passed through a 100-mesh sieve to obtain a self-adhesive layer material. The self-adhesive layer material was extruded to obtain a self-adhesive layer, wherein the tackifying resin I was rosin resin, and the antioxidant was composed of antioxidant 1010 and Tinuvin 326 in a mass ratio of 5:2; S2, compounding an isolation film on the upper side of the self-adhesive layer and a composite buffer layer on the lower side to obtain a semi-finished self-adhesive waterproof membrane; S3, weigh 75 parts of asphalt, heat to 168°C to melt, stir at 30rpm for 60min, heat to 172°C, add 6 parts of SIS rubber, 3 parts of SEBS rubber, and 6 parts of SBR rubber in sequence, mix for the first time, the interval time of each rubber is 30min, cool to 168°C, add 15 parts of talcum powder and 10 parts of calcium carbonate in sequence, mix for the second time, cool to 162°C, add 6 parts of tackifying resin II and 2 parts of composite antioxidant, mix for the third time, heat to 182°C, stir at 35rpm for 60min, and obtain the adhesive layer material after sufficient homogenization, wherein the tackifying resin II is composed of rosin resin, phenolic resin, and petroleum resin in a mass ratio of 3:1:4, and the composite antioxidant is composed of antioxidant 1010 and 2,2'-thiobis(4-methyl-6-tert-butylphenol) in a mass ratio of 1:1, and the adhesive layer material is coated on the polymer film layer; S4, after laminating the buffer layer and the adhesive layer of the semi-finished self-adhesive waterproof membrane, a self-adhesive waterproof membrane is obtained.

[0043] Example 3 A method for preparing a multi-layer self-protective self-adhesive waterproof membrane comprises the following steps: S1. Weigh 75 parts of butyl rubber, heat to 130°C to soften, stir at 40rpm for 15min, heat to 150°C, add 20 parts of SBS modifier and 12 parts of tackifier resin I in sequence, wherein tackifier resin I is added three times within 15min, perform the first mixing, and the stirring speed during the first mixing is 50rpm. Heat to 155°C, add 1.5 parts of antioxidant, perform the second mixing, and the second mixing time is 10min. Then add 15 parts of kaolin, perform the third mixing, kaolin is added three times, each time interval is 5min, and the stirring speed during the third mixing is 60rpm. Heat to 160°C, add 3 parts of polyethylene, perform the fourth mixing, and the fourth mixing is The mixing time is 15 minutes, the temperature is raised to 165°C, 2 parts of ELVALOY toughening agent are added, and the fifth mixing is carried out. The fifth mixing time is 20 minutes, and the stirring speed during the fifth mixing is 50 rpm. The temperature is raised to 175°C, and stirred at 70 rpm for 20 minutes for homogenization reaction. The temperature is lowered to 140°C, and passed through a 100-mesh sieve to obtain a self-adhesive layer material. The self-adhesive layer material is extruded to obtain a self-adhesive layer, wherein the tackifying resin I is a rosin resin, and the antioxidant is composed of an antioxidant 1010 and Tinuvin 326 with a mass ratio of 5:2; S2, compounding an isolation film on the upper side of the self-adhesive layer and a composite buffer layer on the lower side to obtain a semi-finished self-adhesive waterproof membrane; S3, weigh 80 parts of asphalt, heat it to 170°C to melt, stir at 30rpm for 60min, heat it to 175°C, add 9 parts of SIS rubber, 5 parts of SEBS rubber, and 9 parts of SBR rubber in sequence, mix them for the first time, the interval time of each rubber is 30min, cool it to 170°C, add 20 parts of talcum powder and 15 parts of calcium carbonate in sequence, mix them for the second time, cool it to 165°C, add 8 parts of tackifying resin II and 3 parts of composite antioxidant, mix them for the third time, heat it to 185°C, stir at 40rpm for 60min, and obtain the adhesive layer material after sufficient homogenization, wherein the tackifying resin II is composed of rosin resin, phenolic resin, and petroleum resin in a mass ratio of 3:1:4, and the composite antioxidant is composed of antioxidant 1010 and 4,4'-thiobis(3-methyl-6-tert-butylphenol) in a mass ratio of 1:1, and coat the adhesive layer material on the polymer film layer; S4, after laminating the buffer layer and the adhesive layer of the semi-finished self-adhesive waterproof membrane, a self-adhesive waterproof membrane is obtained.

[0044] Example 4 Compared with Example 1, the difference of Example 4 is that the tackifying resin I is composed of phenolic resin and petroleum resin in a mass ratio of 5:1.

[0045] Example 5 Compared with Example 4, the difference of Example 5 is that the tackifying resin I is composed of rosin resin, phenolic resin and petroleum resin in a mass ratio of 3:5:1.

[0046] Example 6 Compared with Example 4, the difference of Example 6 is that the tackifying resin I is composed of rosin resin, phenolic resin and petroleum resin in a mass ratio of 3:6:1.

[0047] Example 7 Compared with Example 4, the difference of Example 7 is that the tackifying resin I is composed of rosin resin, phenolic resin and petroleum resin in a mass ratio of 6:3:1.

[0048] Example 8 Compared with Example 6, Example 8 is different in that the phenolic resin is replaced by an equal amount of coumarone resin.

[0049] Example 9 Compared with Example 6, the difference of Example 9 is that the tackifying resin II is composed of rosin resin, phenolic resin and petroleum resin in a mass ratio of 4:1:4.

[0050] Example 10 Compared with Example 6, the difference of Example 10 is that the tackifying resin II is composed of rosin resin, phenolic resin and petroleum resin in a mass ratio of 1:4:4.

[0051] Comparative Example 1 Compared with Example 1, Comparative Example 1 is different in that tackifying resin I is not added.

[0052] The multilayer self-protection self-adhesive waterproof membranes prepared in Examples 1 to 10 and Comparative Example 1 were tested according to the following method: 1. Peel strength: According to the test method specified in GB / T 35467-2017 "Wet-laid waterproof membrane", test the peel strength between the sample and cement mortar.

[0053] 2. Persistent Adhesion: Test the persistent adhesion of the sample according to the test method specified in GB / T 35467-2017 "Wet-laid Waterproofing Membrane".

[0054] The test results are shown in the following table: Table 1 Performance test results of multi-layer self-protection self-adhesive waterproof membranes prepared in Examples 1 to 10 and Comparative Example 1

[0055] Compared with Comparative Example 1, Example 1 adds rosin resin as tackifying resin I. As a result, the peel strength and persistent adhesion of Example 1 are better than those of Comparative Example 1, indicating that the addition of rosin resin can improve the peel strength and persistent adhesion of the self-adhesive waterproof membrane.

[0056] Compared with Examples 1, 4, and 8, Examples 5 to 7 simultaneously added rosin resin, phenolic resin, and petroleum resin as tackifying resin I. As a result, the peel strength and persistent adhesion of Examples 5 to 7 were better than those of Examples 1, 4, and 8, indicating that the rosin resin, phenolic resin, and petroleum resin play a synergistic role and can further improve the peel strength and persistent adhesion of the self-adhesive waterproof membrane.

[0057] In Examples 5 to 7, rosin resin, phenolic resin and petroleum resin were added in different mass ratios. As a result, the peel strength and the lasting adhesion of Examples 5 and 6 were better than those of Example 7, indicating that when the self-adhesive layer is prepared, when the amount of phenolic resin is higher than that of rosin resin, the peel strength and the lasting adhesion of the obtained self-adhesive waterproof membrane are better.

[0058] Compared with Example 6, Examples 9 and 10 added rosin resin, phenolic resin and petroleum resin in different mass ratios as tackifying resin II. As a result, the peel strength and persistent adhesion of Examples 6 and 9 were better than those of Example 10, indicating that when the amount of rosin resin is higher than that of phenolic resin when preparing the adhesive layer, the peel strength and persistent adhesion of the obtained self-adhesive waterproof membrane are better.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-layer self-protective self-adhesive waterproof membrane, characterized in that: The invention comprises, from top to bottom, an isolation film, a self-adhesive layer, an elastic polyester felt buffer layer, an adhesive layer and a polymer film layer. The self-adhesive layer comprises the following component raw materials in parts by weight: 65-75 parts of butyl rubber, 15-20 parts of SBS modifier, 8-12 parts of tackifying resin I, 0.5-1.5 parts of antioxidant, 8-15 parts of filler, 1-3 parts of polyethylene and 1-2 parts of toughening agent. The tackifying resin I comprises rosin resin.

2. A multi-layer self-protection self-adhesive waterproof membrane according to claim 1, characterized in that: The tackifying resin I also includes phenolic resin and petroleum resin, and the mass ratio of the rosin resin, the phenolic resin and the petroleum resin is 3:5-6:

1.

3. The multi-layer self-protection self-adhesive waterproof membrane according to claim 1, characterized in that: The antioxidant comprises an antioxidant and an ultraviolet absorber in a mass ratio of 5:

2. The antioxidant comprises one or more of antioxidant 1010, antioxidant 300, and antioxidant 264. The ultraviolet absorber is Tinuvin 326.

4. A multi-layer self-protection self-adhesive waterproof membrane according to claim 1, characterized in that: The filler includes one or more of calcium carbonate, talc and kaolin.

5. The multi-layer self-protection self-adhesive waterproof membrane according to claim 1, characterized in that: The toughening agent is ELVALOY toughening agent.

6. The multi-layer self-protection self-adhesive waterproof membrane according to claim 1, characterized in that: The adhesive layer comprises the following raw materials by weight: 70-80 parts of asphalt, 3-9 parts of SIS rubber, 2-5 parts of SEBS rubber, 3-9 parts of SBR rubber, 5-8 parts of tackifying resin II, 10-20 parts of talc, 5-15 parts of calcium carbonate, and 1-3 parts of composite antioxidant.

7. A multi-layer self-protection self-adhesive waterproof membrane according to claim 6, characterized in that: The tackifying resin II is composed of rosin resin, phenolic resin and petroleum resin in a mass ratio of 3-4:1:

4.

8. A multi-layer self-protection self-adhesive waterproof membrane according to claim 6, characterized in that: The composite antioxidant consists of antioxidant 1010 and sulfurized phenolic compounds in a mass ratio of 1:

1.

9. A multi-layer self-protection self-adhesive waterproof membrane according to claim 8, characterized in that: The sulfurized phenol compound includes one or more of 4,4'-thiobis(6-tert-butyl-m-cresol), 2,2'-thiobis(4-methyl-6-tert-butylphenol), and 4,4'-thiobis(3-methyl-6-tert-butylphenol).

10. A method for preparing a multi-layer self-protection self-adhesive waterproof membrane according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. After the raw materials of the self-adhesive layer are mixed, the self-adhesive layer is extruded; S2, compounding an isolation film on the upper side of the self-adhesive layer and a composite buffer layer on the lower side to obtain a semi-finished self-adhesive waterproof membrane; S3, coating the adhesive layer material on the polymer film layer to form an adhesive layer; S4, after laminating the buffer layer and the adhesive layer of the semi-finished self-adhesive waterproof membrane, a self-adhesive waterproof membrane is obtained.

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