High-weather-resistance SBS composite modified waterproof coiled material and preparation method thereof

Abstract

The invention belongs to the technical field of waterproof coiled materials, and particularly relates to a high-weather-resistance SBS composite modified waterproof coiled material and a preparation method thereof. According to the invention, the modified asphalt sizing material is coated on the base layer to prepare the asphalt base material layer, the weather-proof isolating membrane covers the surface of the asphalt base material layer, and the high-weather-proof SBS composite modified waterproof coiled material is prepared by cooling and packaging. A branched chain soft segment of a multi-arm structure of modified SBS has excellent low-temperature elasticity, permanent deformation of the waterproof coiled material in the long-term use process is reduced through a net structure, the cracking and brittle failure phenomena caused by long-time exposure in an outdoor environment are prevented, relative molecular weight is limited, and the situation that coating is difficult due to the fact that viscosity of an asphalt mixture is too high, and the service life of the waterproof coiled material is prolonged is avoided. The processing is easy; the anti-ultraviolet material introduced into the weather-proof isolating membrane has a catechol group and can absorb ultraviolet light, and the falling phenomenon caused by erosion of oxygen and rainwater to the anti-ultraviolet material is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of waterproofing membranes, and particularly relates to a high-weather-resistance SBS composite modified waterproofing membrane and a preparation method thereof. BACKGROUND

[0002] Building waterproofing materials are core functional materials for ensuring the safety of engineering structures, and their performance is directly related to the durability and use function of buildings. One of the most widely used waterproofing materials at present is a styrene-butadiene-styrene block copolymer (SBS) modified waterproofing membrane. The SBS modified waterproofing membrane prepared by taking SBS modified asphalt as a core waterproofing coating and taking a polyester base as a reinforcing material has excellent elasticity and ductility.

[0003] A Chinese patent with the publication number CN120552463B discloses a preparation method of an anti-aging modified asphalt waterproofing membrane. The anti-aging modified asphalt waterproofing membrane includes a polyethylene film, a base layer, and a modified asphalt matrix. The modified asphalt matrix includes the following raw materials in parts by weight: asphalt 45-60 parts, SBS elastomer 10-15 parts, softening agent 8-12 parts, waterproof functional agent 3-5 parts, anti-aging agent 4-6 parts, SBR 5-9 parts, composite filler 5-10 parts, and initiator 0.03-0.05 parts. The anti-aging modified asphalt waterproofing membrane prepared by the method has excellent waterproofing performance, heat aging resistance, and ultraviolet aging resistance, and also has a complex network structure, which endows the matrix with excellent mechanical properties. However, the existing technology has the technical problem that the waterproofing membrane is prone to aging cracking and bulging under long-term sunlight irradiation. SUMMARY

[0004] The purpose of the present application is to provide a high-weather-resistance SBS composite modified waterproofing membrane and a preparation method thereof, which are used to solve the technical problem that the waterproofing membrane is prone to aging cracking and bulging under long-term sunlight irradiation in the prior art.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: The high-weather-resistance SBS composite modified waterproofing membrane includes, from top to bottom, a weather-resistant isolation film, an asphalt base material layer, and a base layer.

[0006] The base layer is a polyester felt base.

[0007] The asphalt base material layer is prepared from the following components in parts by mass: 80-90 parts of asphalt, 3-5 parts of modified SBS, 7-15 parts of softening oil, and 0.5-2 parts of antioxidant.

[0008] The weather-resistant isolation film is prepared from the following components by mass: 80-90 parts of polyethylene, 0.5-1 part of anti-ultraviolet material, 0.5-2 parts of micron-sized silicon dioxide, 0.5-2 parts of stearic acid and 0.5-2 parts of antioxidant.

[0009] The antioxidant is any one of antioxidant 1010, antioxidant 168 and antioxidant 264.

[0010] The preparation method of the modified SBS comprises the following steps: S11, adding a solvent cyclohexane into a reaction kettle, replacing air with nitrogen, preheating, adding styrene and an initiator n-butyllithium, performing one-stage polymerization, then adding butadiene to perform two-stage polymerization, and preparing a styrene-butadiene diblock copolymer; S12, mixing hexachlorodisilane and divinylbenzene to prepare a multi-arm coupling agent, then adding the styrene-butadiene diblock copolymer, adding tetrahydrofurfuryl ethyl ether dropwise, performing coupling reaction in a nitrogen atmosphere, adding a terminating agent isopropyl alcohol to terminate the reaction, and preparing the modified SBS.

[0011] Preferably, the mass ratio of styrene, butadiene and the initiator n-butyllithium in S11 is 33-40:60-67:19-25.

[0012] Preferably, in S11, the preheating temperature is 60-70℃, the reaction temperature of one-stage polymerization is 60-70℃, the reaction time is 30-50 min, the reaction temperature of two-stage polymerization is 85-100℃, and the reaction time is 15-30 min.

[0013] Preferably, in S12, the mass ratio of hexachlorodisilane and divinylbenzene is 0.5-0.8:1-1.5, the amount of the coupling agent added is 80-85% of the mass of the initiator n-butyllithium, the amount of tetrahydrofurfuryl ethyl ether added is 1-3% of the mass of the styrene-butadiene diblock copolymer, the coupling reaction is performed at 50-60℃ for 1-1.5 h.

[0014] Preferably, in S12, the relative molecular mass of the modified SBS is 1.5-2.5×10 5 , and the coupling efficiency is 83-88%.

[0015] Preferably, the preparation method of the anti-ultraviolet material comprises the following steps: S21, adding zinc nitrate into deionized water, adding ammonia water dropwise, stirring to generate a precipitate, collecting the precipitate by filtration, and drying to prepare nano zinc oxide; S22, dissolving sodium silicate in deionized water, adding nano zinc oxide, adding hydrochloric acid dropwise for gelation treatment while stirring, adding acetone for aging, taking out the gel and immersing it in anhydrous ethanol, and drying to obtain a porous antioxidant material; S23, the porous antioxidant material and dopamine are added into deionized water, and a hydrothermal reaction is carried out at high temperature, and the antioxidant ultraviolet material is obtained by filtering and drying.

[0016] Preferably, in S21, the concentration of ammonia water is 20-25%, the amount ratio of zinc nitrate, deionized water and ammonia water is (10-15) g:(200-300) mL:(8-15) mL, stirring is carried out for 20-30 min, and the nano zinc oxide is obtained by drying at 50-60 DEG C.

[0017] Preferably, in S22, the concentration of hydrochloric acid is 2-3%, the hydrochloric acid is added dropwise to promote gelation, and the pH is controlled to be 8-9; the amount ratio of sodium silicate, nano zinc oxide and acetone is (14-15) g:(10-12) g:(20-30) mL, the acetone is added and aged for 4-6 h, the gel is taken out and soaked in anhydrous ethanol for 8-12 h, and drying is carried out at 50-60 DEG C for 2-4 h, and then the temperature is increased to 110-130 DEG C for drying for 2-4 h.

[0018] Preferably, in S23, the mass ratio of the porous antioxidant material and dopamine is 5-7:0.8-1, and the reaction is carried out at 200-220 DEG C for 20-24 h.

[0019] The preparation method of the high-weatherability SBS composite modified waterproof roll material comprises the following steps: S1, the base layer is cleaned and prepared; S2, the modified SBS, bitumen, antioxidant, and softening oil are added into a stirring tank and heated and mixed, pumped into a colloid mill and stirred to obtain modified bitumen glue, and the modified bitumen glue is coated on the base layer to obtain a bitumen base material layer; S3, the polyethylene, the ultraviolet-resistant material, the micron-sized silicon dioxide, the stearic acid, and the antioxidant are mixed and then flow-casted into a film, and the weather-resistant isolation film is obtained after drying; S4, the weather-resistant isolation film is covered on the surface of the bitumen base material layer and compacted, and the high-weatherability SBS composite modified waterproof roll material is obtained after cooling and packaging.

[0020] Preferably, in S2, the temperature is heated to 150-170 DEG C, and the stirring is carried out in the colloid mill for 20-30 min, and the thickness of the bitumen base material layer is 2-2.5 mm.

[0021] Preferably, in S3, the flow-casting is carried out at 210-220 DEG C, and the thickness of the weather-resistant isolation film is 5-10 mu m.

[0022] Preferably, in S4, the compacting pressure is 1-5 MPa, and the compacting time is 2-5 min.

[0023] As described above, due to the adoption of the above technical solutions, the present application has the following beneficial effects: 1. This invention produces a high-weather-resistant SBS composite modified waterproof membrane by coating a modified asphalt binder onto a base layer to form an asphalt substrate layer, covering the surface of the asphalt substrate layer with a weather-resistant release film, and then cooling and packaging it. The multi-arm structure of the modified SBS branched soft segments has excellent low-temperature elasticity. The mesh structure reduces permanent deformation of the waterproof membrane during long-term use, preventing cracking and brittle fracture caused by prolonged exposure in outdoor environments. The limitation of relative molecular weight avoids excessive viscosity of the asphalt mixture, which would make coating difficult and facilitates processing. The UV-resistant material introduced into the weather-resistant release film has catechol groups, which can absorb ultraviolet light and prevent the detachment of materials caused by oxygen and rainwater corrosion.

[0024] 2. After obtaining nano-zinc oxide, this invention loads it onto silica gel and dries it to obtain a porous antioxidant material. This porous antioxidant material has an excellent specific surface area, which increases the contact area between nano-zinc oxide and light, reflects ultraviolet light and reduces radiation damage. The surface obtained by dopamine polymerization rapidly consumes the energy of ultraviolet light through the movement of photogenerated charge carriers in conjunction with nano-zinc oxide, thereby improving the weather resistance of the waterproof membrane. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the layered structure of the high weather-resistant SBS composite modified waterproof membrane of the present invention is shown; Figure reference numerals: 1-weather-resistant isolation membrane, 2-asphalt substrate layer and 3-base layer. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The polyester felt base of this invention has a thickness of 1 mm, the average diameter of the micron-sized silica is 5 μm, and the softening oil is of type NL-45.

[0029] Example 1, see Figure 1As shown, the high-weather-resistance SBS composite modified waterproof roll material of the embodiment comprises, from top to bottom, a weather-resistant isolation film 1, an asphalt base material layer 2 and a tire base layer 3.

[0030] The asphalt base material layer is prepared from the following components: 85 g of asphalt, 3 g of modified SBS, 12 g of softening oil and 2 g of antioxidant 1010.

[0031] The weather-resistant isolation film is prepared from the following components: 90 g of polyethylene, 1 g of ultraviolet-resistant material, 2 g of micron-sized silicon dioxide, 2 g of stearic acid and 2 g of antioxidant 1010.

[0032] The preparation method of the modified SBS of the embodiment comprises the following steps: S11, 1L of solvent cyclohexane is added to a reaction kettle, nitrogen is introduced to replace air, preheating is performed to 65℃, 33 g of styrene and 20 g of initiator n-butyllithium are added, one-stage polymerization is performed at 65℃ for 40 min, 67 g of butadiene is added and two-stage polymerization is performed at 90℃ for 20 min, to prepare a styrene-butadiene diblock copolymer; S12, 6 g of hexachlorodisilane and 10 g of dienylbenzene are mixed to prepare a multi-arm coupling agent, which is then added to 100 g of the styrene-butadiene diblock copolymer, 3 g of tetrahydrofurfuryl ethyl ether is added dropwise, coupling reaction is performed at 60℃ in a nitrogen atmosphere for 1-1.5 h, an isopropyl alcohol terminator is added to terminate the reaction, to prepare the modified SBS, the relative molecular mass of the modified SBS is 1.6×10 5 , and the coupling efficiency is 83.5%.

[0033] The preparation method of the ultraviolet-resistant material of the embodiment comprises the following steps: S21, 10 g of zinc nitrate is added to 250 mL of deionized water, 8.5 mL of 25% ammonia water is added dropwise, stirring is performed for 20 min to generate a precipitate, the precipitate is collected by filtration, and nanometer zinc oxide is prepared by drying at 50℃; S22, 14.5 g of sodium silicate is dissolved in 20 mL of deionized water, 10 g of nanometer zinc oxide is added, 3% hydrochloric acid is added dropwise while stirring to control the pH to 8 for gelation treatment, 20 mL of acetone is added and aged for 4 h, the gel is taken out and soaked in anhydrous ethanol for 10 h, dried at 60℃ for 2 h, then heated to 130℃ and dried for 4 h to obtain a porous antioxidant material; S23, 7 g of the porous antioxidant material and 0.85 g of dopamine are added to deionized water, heated to 220℃ and reacted for 24 h, filtered and dried to obtain the ultraviolet-resistant material.

[0034] The preparation method of the high-weather-resistance SBS composite modified waterproof roll material of the embodiment comprises the following steps: S1, the tire base layer is cleaned and prepared for use; S2, the modified SBS, asphalt, antioxidant, softening oil are added into the stirring tank and heated to 160℃ to mix, pumped into the colloid mill to stir for 20 min to prepare the modified asphalt compound, the modified asphalt compound is coated on the tire base layer to prepare the asphalt base layer, the thickness of the asphalt base layer is 2mm; S3, the polyethylene, ultraviolet resistant material, micron-sized silicon dioxide, stearic acid and antioxidant are mixed to be cast into a film at 220℃, and the weather-resistant release film is prepared after drying, the thickness of the weather-resistant release film is 6μm; S4, the weather-resistant release film is covered on the surface of the asphalt base layer, and is compacted for 2min under the pressure of 1MPa, and the high-weather-resistant SBS composite modified waterproof roll material is prepared after cooling and packaging.

[0035] In the embodiment 2, the high-weather-resistant SBS composite modified waterproof roll material comprises, from top to bottom, the weather-resistant release film, the asphalt base layer and the tire base layer.

[0036] The asphalt base layer is prepared from the following components: 80g of asphalt, 5g of modified SBS, 15g of softening oil and 0.5g of antioxidant 168.

[0037] The weather-resistant release film is prepared from the following components: 80g of polyethylene, 0.5g of ultraviolet resistant material, 0.5g of micron-sized silicon dioxide, 0.5g of stearic acid and 0.5g of antioxidant 168.

[0038] The preparation method of the modified SBS in the embodiment comprises the following steps: S11, 1L of solvent cyclohexane is added into a reaction kettle, nitrogen is introduced to replace air, preheating is performed to 70℃, 35g of styrene and 21.5g of initiator n-butyllithium are added, one-stage polymerization is performed at 60℃ for 50min, 65g of butadiene is added, and two-stage polymerization is performed at 95℃ for 30min to prepare a styrene-butadiene diblock copolymer; S12, 7g of hexachlorodisilane and 12g of dienyl benzene are mixed to prepare a multi-arm coupling agent, which is then added into 100g of the styrene-butadiene diblock copolymer, 2g of tetrahydrofurfuryl ethyl ether is added dropwise, coupling reaction is performed at 50℃ for 1.5h in a nitrogen atmosphere, and a termination agent isopropyl alcohol is added to terminate the reaction to prepare the modified SBS, the relative molecular mass of the modified SBS is 2.3×10 5 , and the coupling efficiency is 85%.

[0039] The preparation method of the ultraviolet resistant material in the embodiment comprises the following steps: S21, 12g of zinc nitrate is added into 200mL of deionized water, 10mL of 20% ammonia water is added dropwise, stirring is performed for 20min to generate a precipitate, the precipitate is collected by filtration, and the nanometer zinc oxide is prepared after drying at 60℃. S22, 14g of sodium silicate is dissolved in 20mL of deionized water, 10g of nano zinc oxide is added, and 3% hydrochloric acid is added dropwise while stirring to control the pH to 8 for gelation treatment, 25mL of acetone is added and aged for 6h, the gel is taken out and soaked in anhydrous ethanol for 12h, dried at 50℃ for 4h, and then heated to 110℃ for 4h to obtain a porous antioxidant material; S23, 6g of the porous antioxidant material and 0.9g of dopamine are added to deionized water, heated to 210℃ and reacted for 22h, filtered and dried to obtain an ultraviolet resistant material.

[0040] The preparation method of the high-weatherability SBS composite modified waterproof roll material of the embodiment comprises the following steps: S1, clean the base layer and prepare it for use; S2, add modified SBS, asphalt, antioxidant, and softening oil to a stirring tank and heat to 170℃ for mixing, pump into a colloid mill and stir for 30min to obtain modified asphalt compound, coat the modified asphalt compound on the base layer to obtain an asphalt base material layer, and the thickness of the asphalt base material layer is 2mm; S3, mix polyethylene, ultraviolet resistant material, micron-sized silicon dioxide, stearic acid, and antioxidant, and flow cast a film at 210℃ to obtain a weather-resistant isolation film after drying, and the thickness of the weather-resistant isolation film is 7μm; S4, cover the weather-resistant isolation film on the surface of the asphalt base material layer at a pressure of 2MPa, compact for 5min, cool, and package to obtain the high-weatherability SBS composite modified waterproof roll material.

[0041] In the embodiment 3, the high-weatherability SBS composite modified waterproof roll material comprises, from top to bottom, a weather-resistant isolation film, an asphalt base material layer, and a base layer.

[0042] The asphalt base material layer is prepared from the following components: 85g of asphalt, 5g of modified SBS, 10g of softening oil, and 1.5g of antioxidant 264.

[0043] The weather-resistant isolation film is prepared from the following components: 90g of polyethylene, 1g of ultraviolet resistant material, 1g of micron-sized silicon dioxide, 1.5g of stearic acid, and 2g of antioxidant 264.

[0044] The preparation method of the modified SBS of the embodiment comprises the following steps: S11, add 1L of solvent cyclohexane to a reaction kettle, replace the air with nitrogen, preheat to 70℃, add 38g of styrene and 23.5g of initiator n-butyllithium, carry out one-stage polymerization at 70℃ for 45min, then add 62g of butadiene and carry out two-stage polymerization at 85℃ for 30min to obtain a styrene-butadiene diblock copolymer; S12, 8g of hexachlorodisilane and 10g of dienyl benzene were mixed to prepare a multi-arm coupling agent, then 100g of styrene-butadiene diblock copolymer was added, 1.5g of tetrahydrofurfuryl ethyl ether was added dropwise, and the coupling reaction was carried out at 60℃ for 1.5h under nitrogen atmosphere, and the reaction was terminated by adding a terminating agent isopropyl alcohol to prepare a modified SBS, the relative molecular mass of the modified SBS was 2.1*10 5 , and the coupling efficiency was 86.2%.

[0045] The preparation method of the anti-ultraviolet material of the embodiment comprises the following steps: S21, 14g of zinc nitrate was added to 300mL of deionized water, 15mL of 25% ammonia water was added dropwise, and the mixture was stirred for 30min to generate a precipitate, the precipitate was collected by filtration, and the precipitate was dried at 60℃ to prepare nano zinc oxide; S22, 15g of sodium silicate was dissolved in 30mL of deionized water, 12g of nano zinc oxide was added, and 2% hydrochloric acid was added dropwise while stirring to control the pH to 8.5 for gelation treatment, 30mL of acetone was added, and the gel was aged for 4h, then the gel was taken out and soaked in anhydrous ethanol for 12h, and then dried at 55℃ for 3h, and then heated to 115℃ for 3h to obtain a porous antioxidant material; S23, 5g of the porous antioxidant material and 1g of dopamine were added to deionized water, and the mixture was heated to 220℃ and reacted for 20h, then filtered and dried to obtain an anti-ultraviolet material.

[0046] The preparation method of the high-weather-resistance SBS composite modified waterproof roll material comprises the following steps: S1, the tire base layer was cleaned and prepared for use; S2, the modified SBS, asphalt, antioxidant, and softening oil were added to a stirring tank and heated to 160℃ for mixing, then pumped into a colloid mill and stirred for 30min to prepare a modified asphalt glue, and the modified asphalt glue was coated on the tire base layer to prepare an asphalt base material layer, and the thickness of the asphalt base material layer was 2-2.5mm; S3, the polyethylene, anti-ultraviolet material, micron-sized silicon dioxide, stearic acid, and antioxidant were mixed and then cast into a film at 215℃, and then dried to prepare a weather-resistant isolation film, and the thickness of the weather-resistant isolation film was 7.5μm; S4, the weather-resistant isolation film was covered on the surface of the asphalt base material layer, and then compacted at a pressure of 3MPa for 5min, and then packaged after cooling to obtain a high-weather-resistance SBS composite modified waterproof roll material.

[0047] In the embodiment 4, the high-weather-resistance SBS composite modified waterproof roll material comprises, from top to bottom, a weather-resistant isolation film, an asphalt base material layer, and a tire base layer.

[0048] The asphalt base material layer was prepared from the following components: 90g of asphalt, 3g of modified SBS, 7g of softening oil, and 0.5g of antioxidant 1010.

[0049] The weather-resistant isolation film is prepared from 80 g of polyethylene, 0.8 g of anti-ultraviolet material, 2 g of micron-sized silicon dioxide, 2 g of stearic acid, and 1.5 g of antioxidant 1010.

[0050] The preparation method of the modified SBS of the embodiment comprises the following steps: S11, 1L of solvent cyclohexane is added into a reaction kettle, nitrogen is introduced to replace air, preheating is performed to 65℃, 40g of styrene and 25g of initiator n-butyllithium are added, one-stage polymerization is performed at 65℃ for 50min, 60g of butadiene is added and two-stage polymerization is performed at 85℃ for 15min to prepare a styrene-butadiene diblock copolymer; S12, 8g of hexachlorodisilane and 14g of dienylbenzene are mixed to prepare a multi-arm coupling agent, which is then added into 100g of the styrene-butadiene diblock copolymer, 1g of tetrahydrofurfuryl ethyl ether is added dropwise, coupling reaction is performed at 60℃ for 1h in a nitrogen atmosphere, an end terminator isopropyl alcohol is added to terminate the reaction, and a modified SBS is prepared, the relative molecular mass of the modified SBS is 1.6×10 5 , and the coupling efficiency is 83.9%.

[0051] The preparation method of the anti-ultraviolet material of the embodiment comprises the following steps: S21, 11.5g of zinc nitrate is added into 220mL of deionized water, 13mL of 25% ammonia water is added dropwise, stirring is performed for 30min to generate a precipitate, the precipitate is collected by filtration, and nanometer zinc oxide is prepared by drying at 60℃; S22, 14g of sodium silicate is dissolved in 20mL of deionized water, 10g of the nanometer zinc oxide is added, 3% hydrochloric acid is added dropwise while stirring to control the pH to 8 for gelation treatment, 30mL of acetone is added, aging is performed for 6h, the gel is taken out and soaked in anhydrous ethanol for 8h, drying is performed at 50~60℃ for 2h, the temperature is then increased to 130℃ for drying for 4h to obtain a porous antioxidant material; S23, 7g of the porous antioxidant material and 0.8g of dopamine are added into deionized water, the temperature is increased to 220℃, and reaction is performed for 22h, the product is collected by filtration and dried to prepare an anti-ultraviolet material.

[0052] The preparation method of the high-weather-resistant SBS composite modified waterproof roll material comprises the following steps: S1, the base layer is cleaned and prepared; S2, the modified SBS, asphalt, antioxidant, and softening oil are added into a stirring tank, heated to 160℃, mixed, pumped into a colloid mill, stirred for 30min to prepare a modified asphalt material, and the modified asphalt material is coated on the base layer to prepare an asphalt base material layer, and the thickness of the asphalt base material layer is 2.5mm; S3, polyethylene, anti-ultraviolet material, micron-sized silicon dioxide, stearic acid and antioxidant were mixed and cast into a film at 210-220 °C, and a weather-resistant release film was prepared after drying, the thickness of the weather-resistant release film was 10 μm; S4, the surface of the asphalt base material layer was covered with a weather-resistant release film, and the pressure was compacted at 5 MPa for 3 min, and the high-weather-resistant SBS composite modified waterproof roll material was packaged after cooling.

[0053] Comparative Example 1, the difference between this comparative example and Example 1 is that the modified SBS is replaced by SBS with model number 3501F.

[0054] Comparative Example 2, the difference between this comparative example and Example 1 is that no anti-ultraviolet material is added.

[0055] Comparative Example 3, the difference between this comparative example and Example 1 is that the porous antioxidant material is directly applied to the weather-resistant release film.

[0056] Performance test According to GB / T 23457-2017 "Pre-paved waterproof roll material", the anti-water channeling performance of the waterproof roll material prepared in each example and comparative example was tested, a hole with a diameter of 10 mm was opened in the middle of the waterproof roll material, mortar was poured on the bonding surface of the roll material test piece, and after 28 d of vibration and curing, it was pressurized to 0.4 MPa and kept for 24 h, and every 0.1 MPa was kept for 4 h, until the pressure gradient was 0.8 MPa / 35 mm, and kept for 4 h to record whether water seepage occurred.

[0057] After the waterproof roll material prepared in each example and comparative example was glued to the cement base surface, it was soaked in water for 28 d, and after being taken out and dried, the joint peeling strength and tensile strength retention rate were tested according to GB / T 328. 20-2007 "Building waterproof roll material test method Part 20: asphalt waterproof roll material Joint peeling performance".

[0058] The waterproof roll material prepared in each example and comparative example was heat aged at 80 °C for 168 h, and the joint peeling strength and tensile strength retention rate were tested according to GB / T 328. 20-2007 "Building waterproof roll material test method Part 20: asphalt waterproof roll material Joint peeling performance".

[0059] The test results are shown in Table 1 below: Table 1 Test results

[0060] From the data in the above table, it can be seen that the waterproofing membranes prepared in Examples 1-4 are not permeated by water under the condition of a pressure gradient of 0.8 MPa / 35 mm, indicating that the waterproofing membranes prepared in the application have excellent waterproofing performance. The modified SBS in Comparative Example 1 is replaced by SBS with a model number of 3501F, resulting in SBS with a layered structure, which has poor anti-peeling performance, and the seam peeling strength in the water resistance test is only 1.9 N / mm, and the peeling surface is a layered peeling structure. The seam peeling strength of the waterproofing membranes prepared in Examples 1-4 after immersion in water for 28 days is 3.2-3.4 N / mm, and the tensile strength retention rate is 90.4-91.3%, and the seam peeling strength after heat aging is 4.0-4.2 N / mm, and the tensile strength retention rate is 92.2-92.6%, indicating that the waterproofing membranes prepared in the application can maintain the bonding performance and deformation performance under long-term water soaking and high temperature conditions in outdoor environments.

[0061] The above description is only a preferred embodiment of the application, and the protection scope of the application is not limited thereto. Any skilled person in the art can make equivalent replacements or changes to the technical solution and the inventive concept of the application within the technical scope disclosed by the application, which should be covered within the protection scope of the application.

[0062] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details, and the application is not limited to the specific embodiments. Obviously, many modifications and changes can be made according to the content of the specification. The specification selects and describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their entire scope and equivalents.

Claims

1. High weather resistance SBS compound modified waterproofing membrane, from top to bottom including weather resistance isolation film, asphalt base layer and tire base layer; The asphalt base layer is prepared from the following components by mass fraction: 80-90 parts of asphalt, 3-5 parts of modified SBS, 7-15 parts of softening oil and 0.5-2 parts of antioxidant; The weather resistance isolation film is prepared from the following components by mass fraction: 80-90 parts of polyethylene, 0.5-1 part of ultraviolet resistant material, 0.5-2 parts of micron-sized silicon dioxide, 0.5-2 parts of stearic acid and 0.5-2 parts of antioxidant.

2. The high-weatherability SBS composite modified waterproofing membrane according to claim 1, characterized in that, The tire base layer is a polyester felt tire base, and the antioxidant is any one of antioxidant 1010, antioxidant 168 and antioxidant 264.

3. The high-weatherability SBS composite modified waterproofing membrane according to claim 1, characterized in that, The preparation method of the modified SBS comprises the following steps: S11, adding solvent cyclohexane into a reaction kettle, replacing air with nitrogen, preheating, adding styrene and initiator n-butyllithium, performing one-stage polymerization, then adding butadiene to perform two-stage polymerization, and preparing styrene-butadiene diblock copolymer; S12, mixing hexachlorodisilane and dienylbenzene to prepare a multi-arm coupling agent, then adding the styrene-butadiene diblock copolymer, adding tetrahydrofurfuryl ethyl ether dropwise, performing coupling reaction in a nitrogen atmosphere, adding terminating agent isopropyl alcohol to terminate the reaction, and preparing modified SBS.

4. The high-weatherability SBS composite modified waterproofing membrane according to claim 3, characterized in that, The mass ratio of styrene, butadiene and initiator n-butyllithium in S11 is 33-40:60-67:19-25, preheated to 60-70℃, the reaction temperature of one-stage polymerization is 60-70℃, the reaction time is 30-50min, the reaction temperature of two-stage polymerization is 85-100℃, and the reaction time is 15-30min; the mass ratio of hexachlorodisilane and divinylbenzene in S12 is 0.5-0.8:1-1.5, the amount of coupling agent added is 80-85% of the mass of initiator n-butyllithium, the coupling reaction is carried out at 50-60℃ for 1-1.5h, and the relative molecular mass of modified SBS is 1.5-2.5×10 5 , and the coupling efficiency is 83-88%.

5. The high weathering SBS composite modified waterproofing membrane according to claim 1, characterized in that, The preparation method of the ultraviolet resistant material comprises the following steps: S21, adding zinc nitrate into deionized water, adding ammonia water dropwise, stirring to generate a precipitate, collecting the precipitate by filtration, and drying to prepare nano zinc oxide; S22, dissolving sodium silicate in deionized water, adding nano zinc oxide, adding hydrochloric acid dropwise for gelation treatment while stirring, adding acetone for aging, taking out the gel and immersing it in anhydrous ethanol, and drying to obtain porous antioxidant material; S23, adding porous antioxidant material and dopamine into deionized water, performing hydrothermal reaction by heating, filtering and drying to prepare ultraviolet resistant material.

6. The high-weathering SBS composite modified waterproofing membrane according to claim 5, characterized in that, In S21, the ammonia water concentration is 20-25%, the amount ratio of zinc nitrate, deionized water and ammonia water is (10-15) g:(200-300) mL:(8-15) mL, stirring is performed for 20-30 min, and nano zinc oxide is prepared by drying at 50-60℃; in S22, the hydrochloric acid concentration is 2-3%, the addition of hydrochloric acid dropwise promotes gelation, the pH is controlled to be 8-9, the amount ratio of sodium silicate, nano zinc oxide and acetone is (14-15) g:(10-12) g:(20-30) mL, the gel is taken out and immersed in anhydrous ethanol for 8-12 h after aging for 4-6 h by adding acetone, and drying is performed at 50-60℃ for 2-4 h and then at 110-130℃ for 2-4 h; in S23, the mass ratio of porous antioxidant material and dopamine is 5-7:0.8-1, and the reaction is performed at 200-220℃ for 20-24 h.

7. The process for preparing the high weatherable SBS composite modified waterproofing membrane according to any one of claims 1-6, characterized in that, The preparation method comprises the following steps: S1, cleaning the tire base layer and reserving it; S2, adding modified SBS, asphalt, antioxidant and softening oil into a stirring tank, heating and mixing, pumping into a colloid mill for stirring to prepare modified asphalt material, and coating the modified asphalt material on the tire base layer to prepare the asphalt base layer; S3, mixing polyethylene, anti-ultraviolet material, micron-sized silicon dioxide, stearic acid and antioxidant, then casting film forming, drying to obtain weather-resistant isolation film; S4, covering the weather-resistant isolation film on the surface of the asphalt base layer, compacting, cooling and packaging to obtain high-weather-resistant SBS composite modified waterproofing membrane.

8. The preparation method of high weatherability SBS composite modified waterproof roll material according to claim 7, characterized in that, In S2, heating to 150-170℃, stirring in colloid mill for 20-30min, and the thickness of the asphalt base layer is 2-2.5mm; in S3, casting film forming at 210-220℃, and the thickness of the weather-resistant isolation film is 5-10μm; in S4, the compacting pressure is 1-5MPa, and the compacting time is 2-5min.

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