A wide-width polymer self-adhesive waterproof roll and its preparation method

Abstract

The present invention discloses a wide-width polymer self-adhesive waterproofing membrane and a preparation method thereof, belonging to the technical field of waterproofing membranes. The preparation process is as follows: HDPE, MDPE, LLDPE and a compound antioxidant are mixed, plasticized and extruded to obtain a waterproofing main material; modified SBS, a tackifier, an auxiliary agent and a silane coupling agent are added to cyclohexane oil to obtain a sizing agent, which is applied to the upper and lower surfaces of the waterproofing main material to obtain a covering material; finally, fiber cloth is covered on the upper surface of the covering material, and mullite sand is spread on the lower surface of the covering material. The present invention prepares a modified SBS to enhance the bonding strength between the self-adhesive and the concrete interface; the present invention adds a silane coupling agent, which has good compatibility with HDPE, MDPE, LLDPE and the modified SBS, and can also chemically cross-link with the concrete base surface; the buffer layer of the present invention can increase the tensile strength of the polymer main layer; and the isolation layer has bonding and protective functions.

Description

Technical Field

[0001] The invention belongs to the technical field of waterproof coiled materials, and particularly relates to a wide-width polymer self-adhesive waterproof coiled material and a preparation method thereof. Background Art

[0002] Polymer self-adhesive waterproofing membranes are constructed with a synthetic high-density sheet as the base film, covered with a polymer self-adhesive film layer. They are used in pre-laid, reverse-adhesive installations. During installation, polymer self-adhesive waterproofing membranes require no heating, open flame sintering, or harmful adhesives. They are simple, quick, safe, and environmentally friendly to use, making them widely used in projects such as subways, underground spaces, and plantations.

[0003] Polymer self-adhesive waterproof membranes have poor weather resistance and water resistance. At the same time, there is also the phenomenon that the concrete substrate and the polymer self-adhesive are easily separated. The peeling phenomenon of the polymer self-adhesive waterproof membrane is more obvious after thermal aging.

[0004] In "Analysis of the Effect of Different Self-Adhesive Layers on the Peeling Strength of Polymer Self-Adhesive Film Waterproofing Membrane and Post-Poured Concrete", Wang Luji et al. used HDPE sheets, hot-melt pressure-sensitive adhesives, butyl adhesives, silicate cement, etc. to prepare non-asphalt-based polymer self-adhesive waterproof membranes, and tested the peeling strength of the waterproof membranes under untreated conditions, after immersion in water, after ultraviolet treatment, and after heat treatment. This study improved the waterproof performance and aging resistance of the waterproof membranes, but the improvement effect was not obvious, and the bonding performance of the polymer self-adhesive waterproof membranes needs to be further improved. Summary of the Invention

[0005] The object of the present invention is to provide a wide-width polymer self-adhesive waterproof membrane and a preparation method thereof, so as to solve the problems in the background technology.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A method for preparing a wide-width polymer self-adhesive waterproof membrane comprises the following steps:

[0008] S1. Polymer main layer: HDPE, MDPE, LLDPE and compound antioxidant are mixed, stirred, heated and plasticized, and extruded and calendered to obtain a waterproof main material with a width of ≥1.8m; wherein the thickness of the waterproof main material is 2.0-2.5mm;

[0009] S2, self-adhesive layer: add modified SBS to naphthenic oil, raise the temperature to 180-185°C, add tackifier, stir at constant temperature for 2-4 hours, add additives and silane coupling agent, lower the temperature to 150°C, stir for 0.5-1 hour to obtain a rubber compound, apply the rubber compound to the upper and lower surfaces of the waterproof main material to form a self-adhesive layer to obtain a covering rubber material; wherein the thickness of the upper self-adhesive layer is 0.8-1.0 mm, and the thickness of the lower self-adhesive layer is 0.25-0.5 mm;

[0010] S3. Buffer isolation layer: Cover the upper surface of the adhesive material with fiber cloth with a thickness of 2mm, then perform a roll forming, evenly spread 30-60 mesh mullite sand on the lower surface of the adhesive material, and then perform a second roll forming. After cooling, winding and packaging, a wide-width polymer self-adhesive waterproof membrane is obtained.

[0011] In the above preparation method, the wide-width polymer self-adhesive waterproof membrane of the present invention is divided into a polymer main layer, a self-adhesive layer and a buffer isolation layer, wherein the polymer main layer has the characteristics of high tensile strength, large elongation and high tear resistance; the self-adhesive layer provides strong bonding performance through mechanical interlocking force, intermolecular force and chemical bond force. At the same time, when the wide-width polymer self-adhesive waterproof membrane is actually laid in scenes such as concrete tunnel maintenance, the cement in the concrete will generate a large amount of hydration heat during the hydration process, and the self-adhesive layer will soften and have a certain viscosity. During the cement hydration process, part of the water in the concrete pores participates in the hydration reaction to form a negative pressure in the pores, thereby absorbing the sticky hot-melt self-adhesive into the pores, and solidifying it in the concrete during the hardening and cooling process to form a bonding interface, providing good waterproof performance; the fiber cloth of the buffer layer can improve the tensile strength of the polymer main layer and increase the self-protection ability of the polymer main layer; the mullite sand of the isolation layer has bonding and protection functions.

[0012] Furthermore, the mass ratio of HDPE, MDPE, LLDPE and compound antioxidant in step S1 is 30-35:30-35:30-35:2-3;

[0013] The mass ratio of the naphthenic oil, modified SBS, tackifier, auxiliary agent and silane coupling agent in step S2 is 30-32:20-25:40:4:6.

[0014] In the above preparation method, in the self-adhesive layer prepared in step S2, modified SBS is used as the base material. In order to further obtain a self-adhesive with better performance, naphthenic oil is added as a plasticizer. Under the premise that other conditions remain unchanged, the amount of naphthenic oil added is inversely proportional to the peel strength of the self-adhesive. However, if the amount of naphthenic oil added is too low, the melt viscosity of the self-adhesive is too high, which is not conducive to coating. Therefore, after research, the present invention controls the amount of plasticizer naphthenic oil to about 30%. The use of tackifiers also has similar problems. The amount of tackifier added is proportional to the peel strength of the self-adhesive, but If the amount of tackifier is too large, the fluidity of the molten self-adhesive will deteriorate. Therefore, after research, the present invention controls the amount of tackifier to about 40%; the present invention adds a silane coupling agent as a functional auxiliary agent, and the amount of silane coupling agent is proportional to the peel strength of the self-adhesive. However, if the amount of silane coupling agent is too large, the peel strength will be reduced. The reason is that too much silane coupling agent will form a deposition layer on the surface of the cement polymer main layer, reducing the bonding effect of the self-adhesive layer. Therefore, after research, the present invention controls the amount of silane coupling agent to about 6%.

[0015] Furthermore, in step S1, the HDPE is HDPE8010; the MDPE is MDPE3518CB; and the LLDPE is LLDPE118WJ.

[0016] Furthermore, the compound antioxidant in step S1 is prepared by mixing a primary antioxidant and an auxiliary antioxidant in a ratio of 1:1;

[0017] The main antioxidant is a hindered phenol antioxidant, and the hindered phenol antioxidant is one of antioxidant 1010 and antioxidant 1076;

[0018] The auxiliary antioxidant is a phosphite antioxidant, and the phosphite antioxidant is antioxidant 168.

[0019] In the above preparation method, the addition of antioxidants can effectively prevent and delay yellowing of the polymer elastomer. The main antioxidant exerts a long-term antioxidant effect by capturing peroxide free radicals; the auxiliary antioxidant achieves the antioxidant purpose by decomposing peroxides; the main antioxidant + auxiliary antioxidant can produce a synergistic effect when used together.

[0020] Furthermore, the modified SBS in step S2 is prepared by the following steps:

[0021] Toluene and SBS were stirred and mixed, acrylic acid and maleic anhydride were added with stirring, and then dibenzoyl peroxide was added. The mixture was reacted at a temperature of 40-80°C for 2 hours. After the reaction, the mixture was washed with methanol. After washing, the mixture was dried at 50°C under vacuum to constant weight to obtain modified SBS.

[0022] Furthermore, the mass ratio of the toluene, SBS, acrylic acid, maleic anhydride and dibenzoyl peroxide is 500 mL: 100 g: 3-5 g: 5-10 g: 15 g.

[0023] Furthermore, the tackifier in step S2 is a mixture of coumarone resin, polyisobutylene, terpene resin and C9 petroleum resin in a mass ratio of 1:1:1:1.

[0024] Furthermore, the auxiliary agent in step S2 is prepared by compounding an antioxidant and an ultraviolet absorber in a mass ratio of 1:1;

[0025] The antioxidant is antioxidant 1010;

[0026] The ultraviolet absorber is a mixture of ultraviolet absorber UV-531, ultraviolet absorber UV-327 and ultraviolet absorber UV-328 in a mass ratio of 1:1:1.

[0027] In the above preparation method, different ultraviolet absorbers absorb ultraviolet waves in different bands. Mixing the above ultraviolet absorbers and then adding them can better absorb ultraviolet waves in sunlight.

[0028] Furthermore, in step S3, the fiber cloth is one of polyester cloth, polypropylene cloth and geotextile.

[0029] In the above preparation method, the fiber cloth provides a buffer layer, which can improve the tensile strength of the polymer main layer and increase the self-protection ability of the polymer main layer. At the same time, the buffer layer can prevent the migration of lightweight components in the self-adhesive and avoid affecting the physical properties of the material.

[0030] Furthermore, the wide-width polymer self-adhesive waterproof membrane is prepared by the above-mentioned preparation method.

[0031] Beneficial effects of the present invention:

[0032] (1) The present invention adds modified SBS when preparing the self-adhesive layer. SBS has low polarity. By using acrylic acid and maleic anhydride as reactive monomers, SBS is grafted and modified. The modified SBS uniformly dispersed in the self-adhesive is hydrolyzed and released during contact with the concrete surface. The active substances can react with calcium ions, hydroxyl groups, etc. in the concrete to form a more stable spatial structure, thereby greatly enhancing the bonding strength between the self-adhesive and the concrete interface.

[0033] (2) The present invention adds a silane coupling agent when preparing the self-adhesive layer. The silane coupling agent has good compatibility with HDPE, MDPE, LLDPE and modified SBS, ensuring good bonding performance between the self-adhesive layer and the polymer main layer. At the same time, the silane coupling agent can invent a chemical cross-linking effect with the concrete base surface. The silane coupling agent can react with the hydroxyl group on the Si-0H group in cement (hydrated calcium silicate) to form an ether bond, forming a chemical bond between the concrete surface and the surface of the coiled material (i.e., the two can be firmly bonded), and can form a fully bonded structure, thereby preventing water leakage, water seepage, etc. (improving waterproof performance);

[0034] (3) The present invention provides a polymer main layer, a self-adhesive layer and a buffer isolation layer when preparing a wide-width polymer self-adhesive waterproof roll. The fiber cloth of the buffer layer can improve the tensile strength of the polymer main layer and increase the self-protection ability of the polymer main layer; the mullite sand of the isolation layer has bonding and protection functions. DETAILED DESCRIPTION

[0035] 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 embodiments described 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0036] Example 1

[0037] Preparation of modified SBS:

[0038] 500 mL of toluene and 100 g of SBS were stirred and mixed, 3 g of acrylic acid and 5 g of maleic anhydride were added with stirring, and then 15 g of dibenzoyl peroxide was added. The mixture was reacted at 40°C for 2 h. After the reaction, the mixture was washed with methanol and dried at 50°C under vacuum to constant weight to obtain modified SBS.

[0039] Example 2

[0040] Preparation of modified SBS:

[0041] 500 mL of toluene and 100 g of SBS were stirred and mixed, 4 g of acrylic acid and 8 g of maleic anhydride were added with stirring, and then 15 g of dibenzoyl peroxide was added. The mixture was reacted at 60°C for 2 h. After the reaction, the mixture was washed with methanol and dried at 50°C under vacuum to constant weight to obtain modified SBS.

[0042] Example 3

[0043] Preparation of modified SBS:

[0044] 500 mL of toluene and 100 g of SBS were stirred and mixed, 5 g of acrylic acid and 10 g of maleic anhydride were added with stirring, and then 15 g of dibenzoyl peroxide was added. The mixture was reacted at 80°C for 2 h. After the reaction, the mixture was washed with methanol and dried at 50°C under vacuum to constant weight to obtain modified SBS.

[0045] Example 4

[0046] A method for preparing a wide-width polymer self-adhesive waterproof membrane comprises the following steps:

[0047] S1. Polymer main layer: 30g of HDPE, 30g of MDPE, 30g of LLDPE and 2g of compound antioxidant are mixed, heated and plasticized, and extruded to obtain a waterproof main material with a width of 1.8m and a thickness of 2.0mm;

[0048] Among them, HDPE is HDPE8010; MDPE is MDPE3518CB; LLDPE is LLDPE118WJ;

[0049] The compound antioxidant is prepared by mixing a main antioxidant and an auxiliary antioxidant in a ratio of 1:1; the main antioxidant is a hindered phenol antioxidant, which is antioxidant 1010; the auxiliary antioxidant is a phosphite antioxidant, which is antioxidant 168;

[0050] S2, self-adhesive layer: add 20g of the modified SBS prepared in Example 1 to 30g of naphthenic oil, raise the temperature to 180°C, add 40g of tackifier, stir at constant temperature for 2h, add 4g of auxiliary agent and 6g of silane coupling agent, cool to 150°C, stir for 0.5h to obtain a sizing material, and apply the sizing material to the upper and lower surfaces of the waterproof main material to form a self-adhesive layer to obtain a covering material; wherein the thickness of the upper self-adhesive layer is 0.8mm, and the thickness of the lower self-adhesive layer is 0.25mm;

[0051] The tackifier is a mixture of coumarone resin, polyisobutylene, terpene resin and C9 petroleum resin in a mass ratio of 1:1:1:1;

[0052] The auxiliary agent is prepared by compounding an antioxidant and an ultraviolet absorber in a mass ratio of 1:1; the antioxidant is antioxidant 1010; the ultraviolet absorber is prepared by mixing ultraviolet absorber UV-531, ultraviolet absorber UV-327 and ultraviolet absorber UV-328 in a mass ratio of 1:1:1;

[0053] S3. Buffer isolation layer: Cover the upper surface of the adhesive material with polyester cloth with a thickness of 2mm, then perform a roll forming, evenly spread 30 mesh mullite sand on the lower surface of the adhesive material, and then perform a second roll forming. After cooling, winding and packaging, a wide-width polymer self-adhesive waterproof membrane is obtained.

[0054] Example 5

[0055] A method for preparing a wide-width polymer self-adhesive waterproof membrane comprises the following steps:

[0056] S1. Polymer main layer: 32g of HDPE, 32g of MDPE, 32g of LLDPE and 3g of compound antioxidant were mixed, heated and plasticized, and extruded to obtain a waterproof main material with a width of 2.0m and a thickness of 2.2mm;

[0057] Among them, HDPE is HDPE8010; MDPE is MDPE3518CB; LLDPE is LLDPE118WJ;

[0058] The compound antioxidant is prepared by mixing a main antioxidant and an auxiliary antioxidant in a ratio of 1:1; the main antioxidant is a hindered phenol antioxidant, which is antioxidant 1076; the auxiliary antioxidant is a phosphite antioxidant, which is antioxidant 168;

[0059] S2, self-adhesive layer: add 22g of the modified SBS prepared in Example 2 to 32g of naphthenic oil, raise the temperature to 182°C, add 40g of tackifier, stir at constant temperature for 3h, add 4g of auxiliary agent and 6g of silane coupling agent, cool to 150°C, stir for 1h to obtain a sizing material, and apply the sizing material to the upper and lower surfaces of the waterproof main material to form a self-adhesive layer to obtain a covering material; wherein the thickness of the upper self-adhesive layer is 0.9mm, and the thickness of the lower self-adhesive layer is 0.4mm;

[0060] The tackifier is a mixture of coumarone resin, polyisobutylene, terpene resin and C9 petroleum resin in a mass ratio of 1:1:1:1;

[0061] The auxiliary agent is prepared by compounding an antioxidant and an ultraviolet absorber in a mass ratio of 1:1; the antioxidant is antioxidant 1010; the ultraviolet absorber is prepared by mixing ultraviolet absorber UV-531, ultraviolet absorber UV-327 and ultraviolet absorber UV-328 in a mass ratio of 1:1:1;

[0062] S3. Buffer isolation layer: Cover the upper surface of the coated material with polypropylene cloth with a thickness of 2mm, then perform a roll forming, evenly spread 50 mesh mullite sand on the lower surface of the coated material, and then perform a second roll forming. After cooling, winding and packaging, a wide-width polymer self-adhesive waterproof membrane is obtained.

[0063] Example 6

[0064] A method for preparing a wide-width polymer self-adhesive waterproof membrane comprises the following steps:

[0065] S1. Polymer main layer: 35g of HDPE, 35g of MDPE, 35g of LLDPE and 3g of compound antioxidant are mixed, heated and plasticized, and extruded to obtain a waterproof main material with a width of 2.2m and a thickness of 2.5mm;

[0066] Among them, HDPE is HDPE8010; MDPE is MDPE3518CB; LLDPE is LLDPE118WJ;

[0067] The compound antioxidant is prepared by mixing a main antioxidant and an auxiliary antioxidant in a ratio of 1:1; the main antioxidant is a hindered phenol antioxidant, which is antioxidant 1076; the auxiliary antioxidant is a phosphite antioxidant, which is antioxidant 168;

[0068] S2, self-adhesive layer: add 25g of the modified SBS prepared in Example 3 to 32g of naphthenic oil, raise the temperature to 185°C, add 40g of tackifier, stir at constant temperature for 4h, add 4g of auxiliary agent and 6g of silane coupling agent, cool to 150°C, stir for 1h to obtain a rubber material, apply the rubber material to the upper and lower surfaces of the waterproof main material to form a self-adhesive layer to obtain a covering rubber material; wherein the thickness of the upper self-adhesive layer is 1.0mm, and the thickness of the lower self-adhesive layer is 0.5mm;

[0069] The tackifier is a mixture of coumarone resin, polyisobutylene, terpene resin and C9 petroleum resin in a mass ratio of 1:1:1:1;

[0070] The auxiliary agent is prepared by compounding an antioxidant and an ultraviolet absorber in a mass ratio of 1:1; the antioxidant is antioxidant 1010; the ultraviolet absorber is prepared by mixing ultraviolet absorber UV-531, ultraviolet absorber UV-327 and ultraviolet absorber UV-328 in a mass ratio of 1:1:1;

[0071] S3. Buffer isolation layer: Cover the upper surface of the covering material with geotextile. The thickness of the geotextile is 2mm. Then perform a roll forming. Evenly spread 60 mesh mullite sand on the lower surface of the covering material. Then perform a second roll forming. After cooling, rolling and packaging, a wide-width polymer self-adhesive waterproof membrane is obtained.

[0072] Comparative Example 1:

[0073] The silane coupling agent in step S2 of Example 4 was removed, and the other raw materials and preparation process remained unchanged to obtain a wide-width polymer self-adhesive waterproof membrane.

[0074] Comparative Example 2:

[0075] The buffer layer of the buffer isolation layer in step S1 of Example 5 is removed, that is, the process of "covering the upper surface of the adhesive material with a polypropylene cloth having a thickness of 2 mm, and then performing a roll forming" is removed, and the other raw materials and preparation processes remain unchanged to obtain a wide-width polymer self-adhesive waterproof membrane.

[0076] Comparative Example 3:

[0077] The buffer layer of the buffer isolation layer in step S1 of Example 5 is removed, that is, the process of "evenly spreading 50 mesh mullite sand on the lower surface of the covering material and then performing secondary roller forming" is removed, and the other raw materials and preparation processes remain unchanged to obtain a wide-width polymer self-adhesive waterproof membrane.

[0078] Comparative Example 4:

[0079] The modified SBS prepared in Example 3 in step S2 of Example 6 was replaced with SBS, and the other raw materials and preparation process remained unchanged to obtain a wide-width polymer self-adhesive waterproof membrane.

[0080] The wide-width polymer self-adhesive waterproof membranes prepared in Examples 4 to 6 and Comparative Examples 1 to 4 were subjected to performance tests. The performance test indicators and standards are as follows, and the test results are shown in Table 1:

[0081] Tensile strength (MPa) and peel strength (N / mm): in accordance with GB / 23457-2017 "Pre-laid waterproof membrane" and Q / CR562.1-2018 "Railway tunnel drainage materials part 1 waterproof sheet";

[0082] Among them, the peel strength was measured under four conditions: no treatment; water immersion treatment, the immersion time was 7 days; ultraviolet treatment, the light source used was a 500W ultraviolet high-pressure pump lamp, the ultraviolet treatment time was 7 days; heat treatment, treatment at 80℃ for 7 days.

[0083] Table 1

[0084]

[0085] From Table 1 we can conclude that:

[0086] (1) By comparing the peel strength data of Example 4 and Comparative Example 1, it can be seen that the addition of a silane coupling agent can improve the peel strength of the waterproof membrane, and particularly significantly improve the peel strength of the waterproof membrane after heat treatment;

[0087] (2) By comparing the tensile strength data of Example 5 and Comparative Example 2, it can be seen that the buffer layer can significantly improve the tensile strength of the waterproof membrane;

[0088] (3) By comparing the tensile strength and peel strength data of Example 5 and Comparative Example 3, it can be seen that the isolation layer can improve the tensile strength and peel strength of the waterproof membrane;

[0089] (4) By comparing the peel strength data of Example 6 and Comparative Example 4, it can be seen that the modified SBS can significantly improve the peel strength of the waterproof membrane, among which the peel strength of the waterproof membrane after immersion treatment, ultraviolet treatment and heat treatment is significantly improved.

[0090] It should be noted that, in this document, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0091] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a wide-width polymer self-adhesive waterproof membrane, characterized in that: The steps include: S1. Polymer main layer: HDPE, MDPE, LLDPE and compound antioxidant are mixed, heated and plasticized, and extruded and calendered to obtain a waterproof main material with a width of ≥1.8m; S2, self-adhesive layer: add modified SBS to naphthenic oil, heat to 180-185℃, add tackifier, stir at constant temperature for 2-4h, add additives and silane coupling agent, cool to 150℃, stir for 0.5-1h to obtain rubber, apply the rubber to the upper and lower surfaces of the waterproof main material to form a self-adhesive layer to obtain the covering rubber material; S3, buffer isolation layer: fiber cloth is covered on the upper surface of the adhesive material, and then roll-formed once, 30-60 mesh mullite is evenly spread on the lower surface of the adhesive material, and then roll-formed twice, cooled, rolled and packaged to obtain a wide-width polymer self-adhesive waterproof membrane; The modified SBS described in step S2 is prepared by the following steps: Toluene and SBS were stirred and mixed, acrylic acid and maleic anhydride were added with stirring, and then dibenzoyl peroxide was added. The mixture was reacted at a temperature of 40-80°C for 2 hours. After the reaction, the mixture was washed with methanol. After washing, the mixture was dried at 50°C under vacuum to constant weight to obtain modified SBS.

2. The method for preparing a wide-width polymer self-adhesive waterproof membrane according to claim 1, characterized in that: The mass ratio of HDPE, MDPE, LLDPE and compound antioxidant in step S1 is 30-35:30-35:30-35:2-3.

3. The method for preparing a wide-width polymer self-adhesive waterproof membrane according to claim 1, characterized in that: The mass ratio of the naphthenic oil, modified SBS, tackifier, auxiliary agent and silane coupling agent in step S2 is 30-32:20-25:40:4:

6.

4. The method for preparing a wide-width polymer self-adhesive waterproof membrane according to claim 1, characterized in that: The compound antioxidant in step S1 is prepared by mixing a primary antioxidant and an auxiliary antioxidant in a ratio of 1:1; The main antioxidant is a hindered phenol antioxidant, and the hindered phenol antioxidant is one of antioxidant 1010 and antioxidant 1076; The auxiliary antioxidant is a phosphite antioxidant, and the phosphite antioxidant is antioxidant 168.

5. The method for preparing a wide-width polymer self-adhesive waterproof membrane according to claim 1, characterized in that: The mass ratio of the toluene, SBS, acrylic acid, maleic anhydride and dibenzoyl peroxide is 500 mL: 100 g: 3-5 g: 5-10 g: 15 g.

6. The method for preparing a wide-width polymer self-adhesive waterproof membrane according to claim 1, characterized in that: The tackifier in step S2 is a mixture of coumarone resin, polyisobutylene, terpene resin and carbon nine petroleum resin in a mass ratio of 1:1:1:

1.

7. The method for preparing a wide-width polymer self-adhesive waterproof membrane according to claim 1, characterized in that: The auxiliary agent in step S2 is prepared by compounding an antioxidant and an ultraviolet absorber in a mass ratio of 1:1; The antioxidant is antioxidant 1010; The ultraviolet absorber is a mixture of ultraviolet absorber UV-531, ultraviolet absorber UV-327 and ultraviolet absorber UV-328 in a mass ratio of 1:1:

1.

8. The method for preparing a wide-width polymer self-adhesive waterproof membrane according to claim 1, characterized in that: In step S3, the fiber cloth is one of polyester cloth, polypropylene cloth and geotextile.

9. A wide polymer self-adhesive waterproof membrane, characterized in that: Prepared by the preparation method according to any one of claims 1 to 8.

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