A microcapsule mildew-resistant and antibacterial modified asphalt waterproofing membrane and preparation method thereof

Abstract

A microcapsule mildew-resistant and antibacterial modified asphalt waterproofing membrane and a preparation method thereof, comprising the following structure: a base is in the middle of the membrane, microcapsule mildew-resistant and antibacterial modified asphalt rubber layers are arranged on both sides of the base, a high-viscosity mildew-resistant and antibacterial modified asphalt rubber layer is arranged on the outside of the microcapsule mildew-resistant and antibacterial modified asphalt rubber layer, a PE hot-melt film is arranged on the bottom, and a PE hot-melt film or mineral granules are arranged on the upper side. The microcapsule mildew-resistant and antibacterial waterproofing membrane exerts a long-term antibacterial effect through the staged release of bactericidal and mildew-proof agents, so that the waterproofing membrane has long-term mildew resistance throughout the entire life cycle of the material, meeting the design requirement that the material and the main building have the same lifespan.

Description

Technical Field

[0001] The invention relates to a microcapsule mildew-resistant and antibacterial modified asphalt waterproofing coiled material and a preparation method thereof, and belongs to the field of production and manufacturing of special waterproofing materials. Background Art

[0002] Modified asphalt waterproof membrane has become the waterproof membrane with the largest selection range and the most extensive use in domestic waterproof projects due to its advantages such as convenient construction, excellent waterproof performance and good weather resistance. It is widely used in roofs, underground, municipal pipeline corridors, large public buildings, high-speed railways and bridges. It is currently irreplaceable in the waterproof market and is a general-purpose building waterproof material that will occupy the domestic waterproof market for a long time.

[0003] In the current performance development and product design of modified asphalt waterproofing membranes, more attention is paid to the material's resistance to high and low temperatures, resistance to thermal oxidation aging, and stability of the waterproof structure. For waterproofing membranes used on roofs or other non-confined spaces, the quality of the above performance can directly determine the waterproofing effect and long-term durability of the material. However, for asphalt-based waterproofing membranes used in confined spaces, especially underground confined spaces, excessive breeding of bacteria and mold in confined and humid spaces will consume the carbon source of the modified asphalt body, the organic rubber components in the modifier, and the organic components of the membrane base fabric, resulting in product performance degradation, greatly weakened waterproofing ability, and a significant decrease in waterproofing effect over a long period of time.

[0004] The mildew resistance and antibacterial properties of materials can generally be improved by directly adding antimicrobial agents and mildew inhibitors. However, due to the extremely long service life of waterproof membranes in underground projects (GB55030-2022 "General Specifications for Building and Municipal Waterproofing" requires that the durability of underground project waterproofing materials must be the same as the life of the building), simply adding mildew inhibitors and bactericides will cause the antibacterial properties to be reduced due to long-term auxiliary agent replacement and precipitation of the materials, and it is impossible to meet the above-mentioned defense requirements of the same life as the main body of the building. Summary of the invention

[0005] The present invention utilizes microcapsule technology to modify the modified asphalt waterproofing membrane, thereby improving the long-term bacteria resistance and mildew resistance of the material, thereby producing a modified asphalt waterproofing membrane with long-lasting bacteria resistance and mildew resistance, thereby achieving the material defense requirement of the existing waterproofing specifications that has the same lifespan as the main building.

[0006] In order to achieve the above effects, the technical means used in the present invention are as follows:

[0007] A microcapsule mildew-resistant and antibacterial modified asphalt waterproofing membrane and a preparation method thereof, comprising the following structure: a base is provided in the middle of the membrane, microcapsule mildew-resistant and antibacterial modified asphalt rubber layers are provided on both sides of the base, a high-viscosity mildew-resistant and antibacterial modified asphalt rubber layer is provided on the outer side of the microcapsule mildew-resistant and antibacterial modified asphalt rubber, a PE hot-melt film is provided on the lowermost side, and a PE hot-melt film or mineral granules are provided on the upper side.

[0008] Preferably, the tire base is a polyester tire base or a glass fiber reinforced polyester tire base with a thickness of 0.8-1.3 mm;

[0009] The microcapsule mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on both sides of the tire base with a thickness of 0.8-1.8 mm;

[0010] The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on the outer side of the mildew-resistant and antibacterial modified asphalt rubber layer by a secondary oiling process, and the thickness is 0.3 mm;

[0011] The PE hot melt film and the mineral granules are arranged on the outermost side of the coil, the thickness of the PE hot melt film is 0.008-0.015 mm, the mineral granules are quartz sand, sintered sand or shale flakes, and the thickness of the mineral granule layer is 0.2 mm.

[0012] Preferably, the microcapsule mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 7-15 parts of rubber modifier, 6-10 parts of tackifying rubber, 15-30 parts of softening oil 1, 0.5-1 part of rubber activator, 15-20 parts of talc, 0.5-1 part of wetting dispersant, and 2-3 parts of microcapsule mildew-resistant and antibacterial structure.

[0013] The national standard asphalt is national standard 70# asphalt or a mixture of national standard 70# and 200# asphalt, and the mixing mass ratio is 70# asphalt: 200# asphalt = 100:10-30;

[0014] The rubber modifier is a styrene-butadiene-styrene block copolymer (SBS) with a linear or star-shaped structure and a melt flow rate of ≤2g / 10min;

[0015] The viscosity-increasing rubber is powder / granular styrene-butadiene rubber, or styrene-acrylic rubber, or a mixture of natural rubber and styrene-acrylic rubber / styrene-butadiene rubber, and the mixing ratio is natural rubber:styrene-butadiene rubber / styrene-acrylic rubber=1:2-3;

[0016] The softening oil 1 is a rubber filler oil or base oil, with a pour point of ≤-25°C and a viscosity of 2000-8000 mPa.s;

[0017] The rubber activator is a phenolic or amide rubber accelerator;

[0018] The talcum powder is 325-800 mesh talcum powder;

[0019] The wetting and dispersing agent is an oily wetting and dispersing agent.

[0020] The preparation method of the microcapsule mildew-resistant and antibacterial modified asphalt rubber is as follows:

[0021] Step 1: put the amount of national standard asphalt and softened oil 1 into a stirring tank, heat it to 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, continue stirring for 60 minutes, and obtain a mixture 1;

[0022] Step 2: Cooling the mixture to 140±5° C., adding the microcapsule structure and the wetting and dispersing agent, and stirring for 60 minutes to obtain the microcapsule mildew-resistant modified asphalt rubber;

[0023] Preferably, the microcapsule antibacterial and mildew-resistant structure is prefabricated and divided into a capsule core and a capsule wall. The mass ratio of the capsule core to the capsule wall is 0.8-2.0:10. The capsule wall is composed of 100 parts of PVA aqueous solution, 100-150 parts of fly ash, 3-5 parts of silane coupling agent, and 0.5-1 part of wetting dispersant. The capsule core is composed of 100 parts of bactericide, 80-120 parts of mildewcide, 40-60 parts of dispersant oil, 1-2 parts of dispersant, and 1-2 parts of defoaming agent.

[0024] The PVA aqueous solution is prepared by mixing PVA powder and water at a mass ratio of 1:1 and stirring at high speed for 30 minutes to make them uniform;

[0025] The fly ash is 60-200 mesh fly ash;

[0026] The silane coupling agent is an amino, methoxy or dimethoxy silane coupling agent;

[0027] The wetting and dispersing agent is an oily wetting and dispersing agent;

[0028] The fungicide is one of 1,2-benzisothiazolin-3-one, pentachlorophenol, bisthiocarbamate, and 2-4-thiazolylbenzimidazole;

[0029] The mildew inhibitor is one of o-phenylphenol, 2-pyridinethiol-1-zinc oxide, ammonium persulfate, and calcium phosphate;

[0030] The dispersing oil is one of prickly ash oil, tea tree oil, mineral oil or lemon essential oil;

[0031] The defoamer is a mineral oil defoamer;

[0032] The microcapsule antibacterial and mildew-resistant structure is prepared by the following process:

[0033] Step 1: uniformly mix the bactericide, mildew preventer, dispersing oil and dispersant in the above mentioned amounts according to the proportion, add defoaming agent after stirring for 30 minutes, and continue stirring for 30 minutes to obtain the microcapsule core component.

[0034] Step 2: Add PVA aqueous solution, fly ash, silane coupling agent, and dispersant to a high-speed dispersant in proportion, start stirring and mixing for 60 minutes to form a viscous powder, and drop the microcapsule core prepared in step 1 into the above-mentioned viscous powder at a certain rate according to the mass ratio, mix evenly, and obtain the microcapsule antibacterial and mildew-resistant structure after the powder coats the core.

[0035] Preferably, the high-viscosity, mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 6-10 parts of rubber modifier, 10-15 parts of tackifying rubber, 25-35 parts of softening oil 2, 0.5-1 part of rubber activator, 30-40 parts of talc, 2-3 parts of bactericide, and 2-3 parts of mildewcide.

[0036] The national standard asphalt is national standard 70# asphalt or a mixture of national standard 70# and 200# asphalt, and the mixing mass ratio is 70# asphalt: 200# asphalt = 100:10-30;

[0037] The rubber modifier is a styrene-butadiene-styrene block copolymer (SBS) with a linear or star-shaped structure and a melt flow rate of ≤2g / 10min;

[0038] The viscosity-increasing rubber is powder / granular styrene-butadiene rubber, or styrene-acrylic rubber, or a mixture of natural rubber and styrene-acrylic rubber / styrene-butadiene rubber, and the mixing ratio is natural rubber:styrene-butadiene rubber / styrene-acrylic rubber=1:2-3;

[0039] The softening oil 2 is mineral oil;

[0040] The rubber activator is a phenolic or amide rubber accelerator;

[0041] The talcum powder is 325-800 mesh talcum powder;

[0042] The fungicide is one of 1,2-benzisothiazolin-3-one, pentachlorophenol, bisthiocarbamate, and 2-4-thiazolylbenzimidazole;

[0043] The mildew preventer is one of o-phenylphenol, 2-pyridinethiol-1-zinc oxide, ammonium persulfate and calcium phosphate.

[0044] The preparation method of the highly sticky, mildew-resistant and antibacterial modified asphalt rubber is as follows:

[0045] Step 1: put the amount of national standard asphalt and softened oil 2 into a stirring tank, heat it to a temperature of 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, and continue stirring for 60 minutes to obtain a mixture 1;

[0046] Step 2: Cool the mixture to 120±5° C., add the bactericide and mildew inhibitor in the amount, and stir for 60 minutes to obtain the high-viscosity, mildew-resistant and antibacterial modified asphalt rubber.

[0047] The microcapsule mildew-resistant and antibacterial modified asphalt membrane uses microcapsule mildew-resistant and antibacterial technology and layered mildew-resistant and antibacterial design. The outer side of the membrane is a high-viscosity mildew-resistant and antibacterial modified asphalt layer structure with conventional added bactericides and mildew inhibitors, with a thickness of 0.3mm, which can withstand the mildew-resistant and antibacterial effect of the material in a 0-5 year waterproof application cycle. The inside is a 0.8-1.3mm microcapsule mildew-resistant and antibacterial asphalt coating. The capsule wall is made of a mixture of PVA aqueous solution and fly ash, coupling agent, etc., and the capsule core is made of a mixture of bactericides, mildew inhibitors, dispersed oil, etc. The microcapsule mildew-resistant and antibacterial structure is prefabricated. After prefabrication, the capsule wall forms a hard shell with filler to encapsulate the functional additives. It is mixed and added at low temperature in the later stage of the modified asphalt rubber processing and coated on the membrane together with the rubber.

[0048] Once the roll material is used in water or humid areas, the conventional high-viscosity mildew-resistant and antibacterial coating structure on the outside will have a short-term bactericidal and mildew-proof effect in the initial period (2-5 years) after the waterproofing project is constructed. After a long time, the outer material is corroded and the functional additives are replaced and precipitated, resulting in the failure of the bactericidal and mildew-proof properties of the outer structure, causing corrosion on the outside of the material and degradation of performance. The water vapor that penetrates into the interior of the roll material will cause the capsule wall of the microcapsule structure to slowly swell when it meets water, resulting in cavities in the capsule wall, and the bactericidal and mildew-proof components in the capsule core will slowly precipitate to prevent the production and reproduction of bacteria for a long period of time (more than 5-20 years). At the same time, the combination of various sizes of microcapsule structures during the prefabrication process can control the swelling rate of the capsule wall and the release rate of the capsule core components, thereby achieving a continuous and long-term antibacterial and mildew-proof effect, and ensuring the effectiveness of the waterproofing effect of the waterproof roll material. DETAILED DESCRIPTION

[0049] Embodiment 1

[0050] A microcapsule mildew-resistant and antibacterial modified asphalt waterproofing membrane and a preparation method thereof, which are composed of the following structure: the middle part of the membrane is a base, microcapsule mildew-resistant and antibacterial modified asphalt rubber layers are arranged on both sides of the base, a high-viscosity mildew-resistant and antibacterial modified asphalt rubber layer is arranged on the outer side of the microcapsule mildew-resistant and antibacterial modified asphalt rubber, and PE hot-melt films are arranged on the upper and lower sides.

[0051] The tire base is a polyester tire base with a thickness of 0.8mm;

[0052] The microcapsule mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on both sides of the tire base with a thickness of 1.1 mm;

[0053] The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on the outer side of the microcapsule mildew-resistant and antibacterial modified asphalt rubber layer by a secondary oiling process, and the thickness is 0.3 mm;

[0054] The PE hot-melt film is arranged on the outermost side of the coil and has a thickness of 0.015 mm.

[0055] The microcapsule mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 8 parts of rubber modifier, 8 parts of tackifying rubber, 20 parts of softening oil 1, 0.7 parts of rubber activator, 16 parts of talcum powder, 0.5 parts of wetting dispersant, and 3 parts of microcapsule mildew-resistant and antibacterial structure.

[0056] The national standard asphalt is national standard 70# asphalt;

[0057] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a linear structure and a melt flow rate of ≤2g / 10min;

[0058] The viscosity-increasing rubber is powdered styrene-butadiene rubber;

[0059] The softening oil 1 is a rubber filling oil with a pour point of ≤-25°C and a viscosity of 6000 mPa.s;

[0060] The rubber activator is a phenolic rubber accelerator;

[0061] The talcum powder is 325 mesh talcum powder;

[0062] The wetting and dispersing agent is an oily wetting and dispersing agent;

[0063] The preparation method is as follows:

[0064] Step 1: put the amount of national standard asphalt and softened oil 1 into a stirring tank, heat it to 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, continue stirring for 60 minutes, and obtain a mixture 1;

[0065] Step 2: Cooling the mixture to 140±5° C., adding the microcapsule structure and the wetting and dispersing agent, and stirring for 60 minutes to obtain the microcapsule mildew-resistant and antibacterial modified asphalt rubber;

[0066] The microcapsule mildew-resistant and antibacterial structure is prefabricated and is divided into a capsule core and a capsule wall. The mass ratio of the capsule core to the capsule wall is 2.0:10. The capsule wall is composed of 100 parts of PVA aqueous solution, 120 parts of fly ash, 4 parts of silane coupling agent, and 0.7 parts of wetting dispersant. The capsule core is composed of 100 parts of bactericide, 100 parts of mildew inhibitor, 50 parts of dispersing oil, 2 parts of dispersant, and 1 part of defoaming agent.

[0067] The PVA aqueous solution is prepared by mixing PVA powder and water at a mass ratio of 1:1 by high-speed stirring for 30 minutes.

[0068] The fly ash is 150 mesh fly ash;

[0069] The silane coupling agent is an aminosilane coupling agent;

[0070] The wetting and dispersing agent is an oily wetting and dispersing agent;

[0071] The bactericide is 1,2-benzisothiazolin-3-one;

[0072] The mildew inhibitor is o-phenylphenol;

[0073] The dispersed oil is prickly ash oil;

[0074] The defoamer is a mineral oil defoamer.

[0075] The microcapsule antibacterial and mildew-resistant structure is prepared by the following process:

[0076] Step 1: uniformly mix the bactericide, mildew preventer, dispersing oil and dispersant in the above mentioned amounts according to the proportion, add defoaming agent after stirring for 30 minutes, and continue stirring for 30 minutes to obtain the microcapsule core component.

[0077] Step 2: Add PVA aqueous solution, fly ash, silane coupling agent, and dispersant to a high-speed dispersant in proportion, start stirring and mixing for 60 minutes to form a viscous powder, and drop the microcapsule core prepared in step 1 into the above-mentioned viscous powder at a certain rate according to the mass ratio, mix evenly, and obtain the microcapsule antibacterial and mildew-resistant structure after the powder coats the core.

[0078] The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 10 parts of rubber modifier, 15 parts of tackifying rubber, 30 parts of softening oil 2, 1 part of rubber activator, 35 parts of talcum powder, 3 parts of bactericide, and 3 parts of mildew inhibitor.

[0079] The national standard asphalt is a mixed asphalt of national standard 70# and 200#, and the mixed mass ratio is 70# asphalt: 200# asphalt = 100:25;

[0080] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a linear structure and a melt flow rate of ≤2g / 10min;

[0081] The viscosity-increasing rubber is powdered styrene-butadiene rubber;

[0082] The softening oil 2 is mineral oil;

[0083] The rubber activator is a phenolic rubber accelerator;

[0084] The talcum powder is 325 mesh talcum powder;

[0085] The bactericide is 1,2-benzisothiazolin-3-one;

[0086] The mildew inhibitor is o-phenylphenol;

[0087] The preparation method is as follows:

[0088] Step 1: put the amount of national standard asphalt and softened oil 2 into a stirring tank, heat it to a temperature of 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, and continue stirring for 60 minutes to obtain a mixture 1;

[0089] Step 2: Cool the mixture to 120±5° C., add the bactericide and mildew inhibitor in the amount, and stir for 60 minutes to obtain the high-viscosity, mildew-resistant and antibacterial modified asphalt rubber.

[0090] Embodiment 2

[0091] A microcapsule mildew-resistant and antibacterial modified asphalt waterproofing membrane and a preparation method thereof, which are composed of the following structure: a base is provided in the middle of the membrane, microcapsule mildew-resistant and antibacterial modified asphalt rubber layers are provided on both sides of the base, a high-viscosity mildew-resistant and antibacterial modified asphalt rubber layer is provided on the outer side of the microcapsule mildew-resistant and antibacterial modified asphalt rubber, a PE hot-melt film is provided on the lowermost side, and mineral granules are provided on the upper side.

[0092] The tire base is a glass fiber reinforced polyester tire base with a thickness of 0.8mm;

[0093] The microcapsule mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on both sides of the tire base with a thickness of 0.8 mm;

[0094] The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on the outer side of the microcapsule mildew-resistant and antibacterial modified asphalt rubber layer by a secondary oiling process, and the thickness is 0.3 mm;

[0095] The PE hot-melt film and the mineral granules are arranged on the outermost side of the coil, the PE hot-melt film has a thickness of 0.008, and the mineral granules are a quartz sand layer with a thickness of 0.2 mm.

[0096] The microcapsule mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 15 parts of rubber modifier, 10 parts of tackifying rubber, 25 parts of softening oil 1, 0.9 parts of rubber activator, 15 parts of talcum powder, 0.5 parts of wetting dispersant, and 2 parts of microcapsule mildew-resistant and antibacterial structure.

[0097] The national standard asphalt is national standard 70# asphalt;

[0098] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a star-shaped structure and a melt flow rate of ≤2g / 10min;

[0099] The viscosity-increasing rubber is styrene-acrylic rubber;

[0100] The softened oil 1 is a base oil with a pour point of ≤-25°C and a viscosity of 2000 mPa.s;

[0101] The rubber activator is an amide rubber accelerator;

[0102] The talcum powder is 600 mesh talcum powder;

[0103] The wetting and dispersing agent is an oily wetting and dispersing agent;

[0104] The preparation method of the microcapsule mildew-resistant and antibacterial modified asphalt rubber is as follows:

[0105] Step 1: put the amount of national standard asphalt and softened oil 1 into a stirring tank, heat it to 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, continue stirring for 60 minutes, and obtain a mixture 1;

[0106] Step 2: Cooling the mixture to 140±5° C., adding the microcapsule structure and the wetting and dispersing agent, and stirring for 60 minutes to obtain the microcapsule mildew-resistant and antibacterial modified asphalt rubber;

[0107] The microcapsule mildew-resistant and antibacterial structure is prefabricated and is divided into a capsule core and a capsule wall. The mass ratio of the capsule core to the capsule wall is 1.5:10. The capsule wall is composed of 100 parts of PVA aqueous solution, 150 parts of fly ash, 5 parts of silane coupling agent, and 1 part of wetting dispersant. The capsule core is composed of 100 parts of bactericide, 80 parts of mildew inhibitor, 60 parts of dispersing oil, 2 parts of dispersant, and 1 part of defoaming agent.

[0108] The PVA aqueous solution is prepared by mixing PVA powder and water in a mass ratio of 1:1 and stirring at high speed for 30 minutes to uniformly mix.

[0109] The fly ash is 120 mesh fly ash;

[0110] The silane coupling agent is a methoxysilane coupling agent;

[0111] The wetting and dispersing agent is an oily wetting and dispersing agent;

[0112] The bactericide is pentachlorophenol;

[0113] The mildew inhibitor is 2-pyridinethiol-1-zinc oxide;

[0114] The dispersing oil is mineral oil;

[0115] The defoamer is a mineral oil defoamer;

[0116] The microcapsule antibacterial and mildew-resistant structure is prepared by the following process:

[0117] Step 1: uniformly mix the bactericide, mildew preventer, dispersing oil and dispersant in the above mentioned amounts according to the proportion, add defoaming agent after stirring for 30 minutes, and continue stirring for 30 minutes to obtain the microcapsule core component.

[0118] Step 2: Add PVA aqueous solution, fly ash, silane coupling agent, and dispersant to a high-speed dispersant in proportion, start stirring and mixing for 60 minutes to form a viscous powder, and drop the microcapsule core prepared in step 1 into the above-mentioned viscous powder at a certain rate according to the mass ratio, mix evenly, and obtain the microcapsule antibacterial and mildew-resistant structure after the powder coats the core.

[0119] The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 6 parts of rubber modifier, 10 parts of tackifying rubber, 35 parts of softening oil 2, 0.5 parts of rubber activator, 30 parts of talcum powder, 2 parts of bactericide, and 2 parts of mildew inhibitor.

[0120] The national standard asphalt is a mixed asphalt of national standard 70# and 200#, and the mixed mass ratio is 70# asphalt: 200# asphalt = 100:10;

[0121] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a star-shaped structure and a melt flow rate of ≤2g / 10min;

[0122] The viscosity-enhancing rubber is a mixture of natural rubber and styrene-acrylic rubber, and the mixing ratio is natural rubber:styrene-acrylic rubber=1:2;

[0123] The softening oil 2 is mineral oil;

[0124] The rubber activator is a phenolic rubber accelerator;

[0125] The talcum powder is 325 mesh talcum powder;

[0126] The bactericide is pentachlorophenol;

[0127] The mildew inhibitor is ammonium persulfate;

[0128] The preparation method is as follows:

[0129] Step 1: put the amount of national standard asphalt and softened oil 2 into a stirring tank, heat it to a temperature of 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, and continue stirring for 60 minutes to obtain a mixture 1;

[0130] Step 2: Cool the mixture to 120±5° C., add the bactericide and mildew inhibitor in the amount, and stir for 60 minutes to obtain the high-viscosity, mildew-resistant and antibacterial modified asphalt rubber.

[0131] Embodiment 3

[0132] A microcapsule mildew-resistant and antibacterial modified asphalt waterproofing membrane and a preparation method thereof, which are composed of the following structure: a base is provided in the middle of the membrane, microcapsule mildew-resistant and antibacterial modified asphalt rubber layers are provided on both sides of the base, a high-viscosity mildew-resistant and antibacterial modified asphalt rubber layer is provided on the outer side of the microcapsule mildew-resistant and antibacterial modified asphalt rubber, a PE hot-melt film is provided on the lowermost side, and mineral granules are provided on the upper side.

[0133] The tire base is a polyester tire base with a thickness of 1.3 mm;

[0134] The microcapsule mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on both sides of the tire base with a thickness of 0.9 mm;

[0135] The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on the outer side of the microcapsule mildew-resistant and antibacterial modified asphalt rubber layer by a secondary oiling process, and the thickness is 0.3 mm;

[0136] The PE hot-melt film and the mineral granules are arranged on the outermost side of the coil, the thickness of the PE hot-melt film is 0.01 mm, the mineral granules are sintered sand, and the thickness of the mineral granule layer is 0.2 mm.

[0137] The microcapsule mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 12 parts of rubber modifier, 8 parts of tackifying rubber, 20 parts of softening oil 1, 0.8 parts of rubber activator, 20 parts of talcum powder, 1 part of wetting dispersant, and 2 parts of microcapsule mildew-resistant and antibacterial structure.

[0138] The national standard asphalt is national standard 70# asphalt;

[0139] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a star-shaped structure and a melt flow rate of ≤2g / 10min;

[0140] The viscosity-increasing rubber is granular styrene-butadiene rubber;

[0141] The softening oil 1 is a rubber filling oil with a pour point of ≤-25°C and a viscosity of 5000 mPa.s;

[0142] The rubber activator is a phenolic rubber accelerator;

[0143] The talcum powder is 325 mesh talcum powder;

[0144] The wetting and dispersing agent is an oily wetting and dispersing agent;

[0145] The preparation method of the microcapsule mildew-resistant and antibacterial modified asphalt rubber is as follows:

[0146] Step 1: put the amount of national standard asphalt and softened oil 1 into a stirring tank, heat it to 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, continue stirring for 60 minutes, and obtain a mixture 1;

[0147] Step 2: Cooling the mixture to 140±5° C., adding the microcapsule structure and the wetting and dispersing agent, and stirring for 60 minutes to obtain the microcapsule mildew-resistant and antibacterial modified asphalt rubber;

[0148] The microcapsule mildew-resistant and antibacterial structure is prefabricated and is divided into a capsule core and a capsule wall. The mass ratio of the capsule core to the capsule wall is 0.8:10. The capsule wall is composed of 100 parts of PVA aqueous solution, 150 parts of fly ash, 4 parts of silane coupling agent, and 0.8 parts of wetting dispersant. The capsule core is composed of 100 parts of bactericide, 80 parts of mildew inhibitor, 40 parts of dispersing oil, 1 part of dispersant, and 1 part of defoaming agent.

[0149] The PVA aqueous solution is prepared by mixing PVA powder and water at a mass ratio of 1:1 and stirring at high speed for 30 minutes to make them uniform;

[0150] The fly ash is 200 mesh fly ash;

[0151] The silane coupling agent is a dimethoxysilane coupling agent;

[0152] The wetting and dispersing agent is an oily wetting and dispersing agent;

[0153] The bactericide is 2-4-thiazolylbenzimidazole;

[0154] The mildew inhibitor is calcium phosphate;

[0155] The dispersed oil is lemon essential oil;

[0156] The defoamer is a mineral oil defoamer.

[0157] The microcapsule antibacterial and mildew-resistant structure is prepared by the following process:

[0158] Step 1: uniformly mix the bactericide, mildew preventer, dispersing oil and dispersant in the above mentioned amounts according to the proportion, add defoaming agent after stirring for 30 minutes, and continue stirring for 30 minutes to obtain the microcapsule core component.

[0159] Step 2: Add PVA aqueous solution, fly ash, silane coupling agent, and dispersant to a high-speed dispersant in proportion, start stirring and mixing for 60 minutes to form a viscous powder, and drop the microcapsule core prepared in step 1 into the above-mentioned viscous powder at a certain rate according to the mass ratio, mix evenly, and obtain the microcapsule antibacterial and mildew-resistant structure after the powder coats the core.

[0160] The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 10 parts of rubber modifier, 12 parts of tackifying rubber, 30 parts of softening oil 2, 0.7 parts of rubber activator, 35 parts of talcum powder, 2 parts of bactericide, and 2 parts of mildew inhibitor.

[0161] The national standard asphalt is national standard 70# asphalt;

[0162] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a linear structure and a melt flow rate of ≤2g / 10min;

[0163] The viscosity-increasing rubber is a mixture of natural rubber and styrene-butadiene rubber, and the mixing ratio is natural rubber:styrene-butadiene rubber=1:2.5;

[0164] The softening oil 2 is mineral oil;

[0165] The rubber activator is a phenolic rubber accelerator;

[0166] The talcum powder is 325 mesh talcum powder;

[0167] The bactericide is a dithiocarbamate;

[0168] The mildew inhibitor is ammonium persulfate;

[0169] The preparation method of the highly viscous, mildew-resistant and antibacterial modified asphalt rubber is as follows:

[0170] Step 1: put the amount of national standard asphalt and softened oil 2 into a stirring tank, heat it to a temperature of 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, and continue stirring for 60 minutes to obtain a mixture 1;

[0171] Step 2: Cool the mixture to 120±5° C., add the bactericide and mildew inhibitor in the amount, and stir for 60 minutes to obtain the high-viscosity, mildew-resistant and antibacterial modified asphalt rubber.

[0172] Embodiment 4

[0173] A microcapsule mildew-resistant and antibacterial modified asphalt waterproofing membrane and a preparation method thereof, which are composed of the following structure: the middle part of the membrane is a base, microcapsule mildew-resistant and antibacterial modified asphalt rubber layers are arranged on both sides of the base, a high-viscosity mildew-resistant and antibacterial modified asphalt rubber layer is arranged on the outer side of the microcapsule mildew-resistant and antibacterial modified asphalt rubber, a PE hot-melt film is arranged on the lowermost side, and a PE hot-melt film is arranged on the upper side.

[0174] The tire base is a glass fiber reinforced polyester tire base with a thickness of 1.1 mm;

[0175] The microcapsule mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on both sides of the tire base with a thickness of 1.4 mm;

[0176] The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on the outer side of the microcapsule mildew-resistant and antibacterial modified asphalt rubber layer by a secondary oiling process, and the thickness is 0.3 mm;

[0177] The PE hot melt film is arranged on the outermost side of the coil and has a thickness of 0.010 mm;

[0178] The microcapsule mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 10 parts of rubber modifier, 10 parts of tackifying rubber, 20 parts of softening oil 1, 0.8 parts of rubber activator, 15 parts of talcum powder, 0.5 parts of wetting dispersant, and 2 parts of microcapsule mildew-resistant and antibacterial structure.

[0179] The national standard asphalt is a mixed asphalt of national standard 70# and 200#, and the mixed mass ratio is 70# asphalt: 200# asphalt = 100:20;

[0180] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a linear structure and a melt flow rate of ≤2g / 10min;

[0181] The viscosity-increasing rubber is powdered styrene-butadiene rubber;

[0182] The softening oil 1 is a rubber filler oil or base oil, with a pour point of ≤-25°C and a viscosity of 6000 mPa.s;

[0183] The rubber activator is an amide rubber accelerator;

[0184] The talcum powder is 600 mesh talcum powder;

[0185] The wetting and dispersing agent is an oily wetting and dispersing agent;

[0186] The preparation method of the microcapsule mildew-resistant and antibacterial modified asphalt rubber is as follows:

[0187] Step 1: put the amount of national standard asphalt and softened oil 1 into a stirring tank, heat it to 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, continue stirring for 60 minutes, and obtain a mixture 1;

[0188] Step 2: Cooling the mixture to 140±5° C., adding the microcapsule structure and the wetting and dispersing agent, and stirring for 60 minutes to obtain the microcapsule mildew-resistant and antibacterial modified asphalt rubber;

[0189] The microcapsule mildew-resistant and antibacterial structure is prefabricated and is divided into a capsule core and a capsule wall. The mass ratio of the capsule core to the capsule wall is 2.0:10. The capsule wall is composed of 100 parts of PVA aqueous solution, 130 parts of fly ash, 4 parts of silane coupling agent, and 1 part of wetting dispersant. The capsule core is composed of 100 parts of bactericide, 110 parts of mildew inhibitor, 50 parts of dispersing oil, 2 parts of dispersant, and 2 parts of defoaming agent.

[0190] The PVA aqueous solution is prepared by mixing PVA powder and water in a mass ratio of 1:1 and stirring at high speed for 30 minutes to uniformly mix.

[0191] The fly ash is 200 mesh fly ash;

[0192] The silane coupling agent is a methoxysilane coupling agent;

[0193] The wetting and dispersing agent is an oily wetting and dispersing agent;

[0194] The bactericide is a dithiocarbamate;

[0195] The mildew inhibitor is 2-pyridinethiol-1-zinc oxide;

[0196] The dispersed oil is tea tree oil;

[0197] The defoamer is a mineral oil defoamer;

[0198] The microcapsule antibacterial and mildew-resistant structure is prepared by the following process:

[0199] Step 1: uniformly mix the bactericide, mildew preventer, dispersing oil and dispersant in the above mentioned amounts according to the proportion, add defoaming agent after stirring for 30 minutes, and continue stirring for 30 minutes to obtain the microcapsule core component.

[0200] Step 2: Add PVA aqueous solution, fly ash, silane coupling agent, and dispersant to a high-speed dispersant in proportion, start stirring and mixing for 60 minutes to form a viscous powder, and drop the microcapsule core prepared in step 1 into the above-mentioned viscous powder at a certain rate according to the mass ratio, mix evenly, and obtain the microcapsule antibacterial and mildew-resistant structure after the powder coats the core.

[0201] The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 6 parts of rubber modifier, 12 parts of tackifying rubber, 30 parts of softening oil 2, 0.6 parts of rubber activator, 35 parts of talcum powder, 3 parts of bactericide, and 3 parts of mildew inhibitor.

[0202] The national standard asphalt is national standard 70# asphalt;

[0203] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a star-shaped structure and a melt flow rate of ≤2g / 10min;

[0204] The viscosity-increasing rubber is styrene-acrylic rubber;

[0205] The softening oil 2 is mineral oil;

[0206] The rubber activator is an amide rubber accelerator;

[0207] The talcum powder is 800 mesh talcum powder;

[0208] The bactericide is a dithiocarbamate;

[0209] The mildew inhibitor is ammonium persulfate.

[0210] The preparation method of the highly viscous, mildew-resistant and antibacterial modified asphalt rubber is as follows:

[0211] Step 1: put the amount of national standard asphalt and softened oil 2 into a stirring tank, heat it to a temperature of 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, and continue stirring for 60 minutes to obtain a mixture 1;

[0212] Step 2: Cool the mixture to 120±5° C., add the bactericide and mildew inhibitor in the amount, and stir for 60 minutes to obtain the high-viscosity, mildew-resistant and antibacterial modified asphalt rubber.

[0213] Embodiment 5

[0214] A microcapsule mildew-resistant and antibacterial modified asphalt waterproofing membrane and a preparation method thereof, which are composed of the following structure: a base is provided in the middle of the membrane, microcapsule mildew-resistant and antibacterial modified asphalt rubber layers are provided on both sides of the base, a high-viscosity mildew-resistant and antibacterial modified asphalt rubber layer is provided on the outer side of the microcapsule mildew-resistant and antibacterial modified asphalt rubber, a PE hot-melt film is provided on the lowermost side, and mineral granules are provided on the upper side.

[0215] The tire base is a glass fiber reinforced polyester tire base with a thickness of 1.2 mm;

[0216] The microcapsule mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on both sides of the tire base with a thickness of 1.3 mm;

[0217] The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on the outer side of the microcapsule mildew-resistant and antibacterial modified asphalt rubber layer by a secondary oiling process, and the thickness is 0.3 mm;

[0218] The PE hot-melt film and the mineral granules are arranged on the outermost side of the coil, the thickness of the PE hot-melt film is 0.008 mm, the mineral granules are shale sheets, and the thickness of the mineral granule layer is 0.2 mm.

[0219] The microcapsule mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 12 parts of rubber modifier, 8 parts of tackifying rubber, 20 parts of softening oil 1, 0.8 parts of rubber activator, 20 parts of talcum powder, 0.8 parts of wetting dispersant, and 3 parts of microcapsule mildew-resistant and antibacterial structure.

[0220] The national standard asphalt is a mixture of national standard 70# and 200# asphalt, with a mixing mass ratio of 70# asphalt: 200# asphalt = 100:20;

[0221] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a star-shaped structure and a melt flow rate of ≤2g / 10min;

[0222] The viscosity-increasing rubber is granular styrene-butadiene rubber;

[0223] The softening oil 1 is a rubber filler oil or base oil, with a pour point of ≤-25°C and a viscosity of 2000-8000 mPa.s;

[0224] The rubber activator is a phenolic rubber accelerator;

[0225] The talcum powder is 325 mesh talcum powder;

[0226] The wetting and dispersing agent is an oily wetting and dispersing agent.

[0227] The preparation method of the microcapsule mildew-resistant and antibacterial modified asphalt rubber is as follows:

[0228] Step 1: put the amount of national standard asphalt and softened oil 1 into a stirring tank, heat it to 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, continue stirring for 60 minutes, and obtain a mixture 1;

[0229] Step 2: Cooling the mixture to 140±5° C., adding the microcapsule structure and the wetting and dispersing agent, and stirring for 60 minutes to obtain the microcapsule mildew-resistant and antibacterial modified asphalt rubber;

[0230] The microcapsule mildew-resistant and antibacterial structure is prefabricated and is divided into a capsule core and a capsule wall. The mass ratio of the capsule core to the capsule wall is 1.5:10. The capsule wall is composed of 100 parts of PVA aqueous solution, 120 parts of fly ash, 4 parts of silane coupling agent, and 0.8 parts of wetting dispersant. The capsule core is composed of 100 parts of bactericide, 120 parts of mildew inhibitor, 50 parts of dispersing oil, 2 parts of dispersant, and 2 parts of defoaming agent.

[0231] The PVA aqueous solution is prepared by mixing PVA powder and water in a mass ratio of 1:1 and stirring at high speed for 30 minutes to uniformly mix.

[0232] The fly ash is 140 mesh fly ash;

[0233] The silane coupling agent is a dimethoxysilane coupling agent;

[0234] The wetting and dispersing agent is an oily wetting and dispersing agent;

[0235] The bactericide is 1,2-benzisothiazolin-3-one;

[0236] The mildew inhibitor is 2-pyridinethiol-1-zinc oxide;

[0237] The dispersing oil is mineral oil;

[0238] The defoamer is a mineral oil defoamer.

[0239] The microcapsule antibacterial and mildew-resistant structure is prepared by the following process:

[0240] Step 1: uniformly mix the bactericide, mildew preventer, dispersing oil and dispersant in the above mentioned amounts according to the proportion, add defoaming agent after stirring for 30 minutes, and continue stirring for 30 minutes to obtain the microcapsule core component.

[0241] Step 2: Add PVA aqueous solution, fly ash, silane coupling agent, and dispersant to a high-speed dispersant in proportion, start stirring and mixing for 60 minutes to form a viscous powder, and drop the microcapsule core prepared in step 1 into the above-mentioned viscous powder at a certain rate according to the mass ratio, mix evenly, and obtain the microcapsule antibacterial and mildew-resistant structure after the powder coats the core.

[0242] The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 6 parts of rubber modifier, 14 parts of tackifying rubber, 25 parts of softening oil 2, 1 part of rubber activator, 40 parts of talcum powder, 2 parts of bactericide, and 2 parts of mildew inhibitor.

[0243] The national standard asphalt is a mixed asphalt of national standard 70# and 200#, and the mixed mass ratio is 70# asphalt: 200# asphalt = 100:30;

[0244] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a linear structure and a melt flow rate of ≤2g / 10min;

[0245] The viscosity-enhancing rubber is a mixture of natural rubber and styrene-acrylic rubber, and the mixing ratio is natural rubber:styrene-acrylic rubber=1:2.6;

[0246] The softening oil 2 is mineral oil;

[0247] The rubber activator is an amide rubber accelerator;

[0248] The talcum powder is 325 mesh talcum powder;

[0249] The bactericide is a dithiocarbamate;

[0250] The mildew inhibitor is ammonium persulfate.

[0251] The preparation method of the highly viscous, mildew-resistant and antibacterial modified asphalt rubber is as follows:

[0252] Step 1: put the amount of national standard asphalt and softened oil 2 into a stirring tank, heat it to a temperature of 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, and continue stirring for 60 minutes to obtain a mixture 1;

[0253] Step 2: Cool the mixture to 120±5° C., add the bactericide and mildew inhibitor in the amount, and stir for 60 minutes to obtain the high-viscosity, mildew-resistant and antibacterial modified asphalt rubber.

[0254] Comparative Example 1

[0255] A microcapsule mildew-resistant and antibacterial modified asphalt waterproofing coiled material and a preparation method thereof, comprising the following structure: a base is provided in the middle of the coiled material, microcapsule mildew-resistant and antibacterial modified asphalt rubber layers are provided on both sides of the base, and PE hot-melt films are provided on the upper and lower sides.

[0256] The tire base is a polyester tire base with a thickness of 0.8mm;

[0257] The microcapsule mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on both sides of the tire base with a thickness of 1.4 mm;

[0258] The PE hot-melt film is arranged on the outermost side of the coil and has a thickness of 0.015 mm.

[0259] The microcapsule mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 8 parts of rubber modifier, 8 parts of tackifying rubber, 20 parts of softening oil 1, 0.7 parts of rubber activator, 16 parts of talcum powder, 0.5 parts of wetting dispersant, and 3 parts of microcapsule mildew-resistant and antibacterial structure.

[0260] The national standard asphalt is national standard 70# asphalt;

[0261] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a linear structure and a melt flow rate of ≤2g / 10min;

[0262] The viscosity-increasing rubber is powdered styrene-butadiene rubber;

[0263] The softening oil 1 is a rubber filling oil with a pour point of ≤-25°C and a viscosity of 6000 mPa.s;

[0264] The rubber activator is a phenolic rubber accelerator;

[0265] The talcum powder is 325 mesh talcum powder;

[0266] The wetting and dispersing agent is an oily wetting and dispersing agent;

[0267] The preparation method of the microcapsule mildew-resistant and antibacterial modified asphalt rubber is as follows:

[0268] Step 1: put the amount of national standard asphalt and softened oil 1 into a stirring tank, heat it to 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, continue stirring for 60 minutes, and obtain a mixture 1;

[0269] Step 2: Cool the mixture to 140±5° C., add the microcapsule structure and the wetting dispersant, and stir for 60 minutes to obtain the microcapsule mildew-resistant and antibacterial modified asphalt rubber.

[0270] The microcapsule mildew-resistant and antibacterial structure is prefabricated and is divided into a capsule core and a capsule wall. The mass ratio of the capsule core to the capsule wall is 2.0:10. The capsule wall is composed of 100 parts of PVA aqueous solution, 120 parts of fly ash, 4 parts of silane coupling agent, and 0.7 parts of wetting dispersant. The capsule core is composed of 100 parts of bactericide, 100 parts of mildew inhibitor, 50 parts of dispersing oil, 2 parts of dispersant, and 1 part of defoaming agent.

[0271] The PVA aqueous solution is prepared by mixing PVA powder and water in a mass ratio of 1:1 and stirring at high speed for 30 minutes to uniformly mix.

[0272] The fly ash is 150 mesh fly ash;

[0273] The silane coupling agent is an aminosilane coupling agent;

[0274] The wetting and dispersing agent is an oily wetting and dispersing agent;

[0275] The bactericide is 1,2-benzisothiazolin-3-one;

[0276] The mildew inhibitor is o-phenylphenol;

[0277] The dispersed oil is prickly ash oil;

[0278] The defoamer is a mineral oil defoamer.

[0279] The microcapsule antibacterial and mildew-resistant structure is prepared by the following process:

[0280] Step 1: uniformly mix the bactericide, mildew preventer, dispersing oil and dispersant in the above mentioned amounts according to the proportion, add defoaming agent after stirring for 30 minutes, and continue stirring for 30 minutes to obtain the microcapsule core component.

[0281] Step 2: Add PVA aqueous solution, fly ash, silane coupling agent, and dispersant to a high-speed dispersant in proportion, start stirring and mixing for 60 minutes to form a viscous powder, and drop the microcapsule core prepared in step 1 into the above-mentioned viscous powder at a certain rate according to the mass ratio, mix evenly, and obtain the microcapsule antibacterial and mildew-resistant structure after the powder coats the core.

[0282] Comparative Example 2

[0283] A mildew-resistant and antibacterial modified asphalt waterproofing membrane and a preparation method thereof are composed of the following structure: the middle of the membrane is a base, high-viscosity mildew-resistant and antibacterial modified asphalt rubber layers are arranged on both sides of the base, a PE hot-melt film is arranged on the bottom, and mineral granules are arranged on the upper side.

[0284] The tire base is a glass fiber reinforced polyester tire base with a thickness of 0.8mm;

[0285] The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on the outside of the tire base, and the thickness is 1.1 mm;

[0286] The PE hot-melt film and the mineral granules are arranged on the outermost side of the coil, the PE hot-melt film has a thickness of 0.008, and the mineral granules are a quartz sand layer with a thickness of 0.2 mm.

[0287] The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 6 parts of rubber modifier, 10 parts of tackifying rubber, 35 parts of softening oil 2, 0.5 parts of rubber activator, 30 parts of talcum powder, 2 parts of bactericide, and 2 parts of mildew inhibitor.

[0288] The national standard asphalt is a mixed asphalt of national standard 70# and 200#, and the mixed mass ratio is 70# asphalt: 200# asphalt = 100:10;

[0289] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a star-shaped structure and a melt flow rate of ≤2g / 10min;

[0290] The viscosity-enhancing rubber is a mixture of natural rubber and styrene-acrylic rubber, and the mixing ratio is natural rubber:styrene-acrylic rubber=1:2;

[0291] The softening oil 2 is mineral oil;

[0292] The rubber activator is a phenolic rubber accelerator;

[0293] The talcum powder is 325 mesh talcum powder;

[0294] The bactericide is pentachlorophenol;

[0295] The mildew inhibitor is ammonium persulfate.

[0296] The preparation method is as follows:

[0297] Step 1: Put the amount of national standard asphalt and softened oil 2 into a stirring tank, heat it to 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, continue stirring for 60 minutes, and obtain a mixture.

[0298] Step 2: Cool the mixture to 120±5° C., add the bactericide and mildew inhibitor in the amount, and stir for 60 minutes to obtain the high-viscosity, mildew-resistant and antibacterial modified asphalt rubber.

[0299] Comparative Example 3

[0300] A mildew-resistant and antibacterial modified asphalt waterproofing membrane and a preparation method thereof, comprising the following structure: a base is provided in the middle of the membrane, modified asphalt rubber layers are provided on both sides of the base, a high-viscosity mildew-resistant and antibacterial modified asphalt rubber layer is provided on the outer side of the modified asphalt rubber, a PE hot-melt film is provided on the lowermost side, and mineral granules are provided on the upper side.

[0301] The tire base is a polyester tire base with a thickness of 1.3 mm;

[0302] The modified asphalt rubber layer is hot-coated on both sides of the tire base with a thickness of 0.9 mm;

[0303] The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on the outer side of the modified asphalt rubber layer using a secondary oiling process, and the thickness is 0.3 mm;

[0304] The PE hot-melt film and the mineral granules are arranged on the outermost side of the coil, the thickness of the PE hot-melt film is 0.01 mm, the mineral granules are sintered sand, and the thickness of the mineral granule layer is 0.2 mm.

[0305] The modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 12 parts of rubber modifier, 8 parts of tackifying rubber, 20 parts of softening oil 1, 0.8 parts of rubber activator, 20 parts of talcum powder, and 1 part of wetting dispersant;

[0306] The national standard asphalt is national standard 70# asphalt;

[0307] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a star-shaped structure and a melt flow rate of ≤2g / 10min;

[0308] The viscosity-increasing rubber is granular styrene-butadiene rubber;

[0309] The softening oil 1 is a rubber filling oil with a pour point of ≤-25°C and a viscosity of 5000 mPa.s;

[0310] The rubber activator is a phenolic rubber accelerator;

[0311] The talcum powder is 325 mesh talcum powder;

[0312] The wetting and dispersing agent is an oily wetting and dispersing agent.

[0313] The preparation method is as follows:

[0314] Step 1: Put the amount of national standard asphalt and softened oil 1 into a stirring tank, heat it to 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, continue stirring for 60 minutes, and obtain a mixture.

[0315] Step 2: Cool the mixture to 140±5°C, add the amount of wetting and dispersing agent, and stir for 60 minutes to obtain the modified asphalt rubber.

[0316] The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 10 parts of rubber modifier, 12 parts of tackifying rubber, 30 parts of softening oil 2, 0.7 parts of rubber activator, 35 parts of talcum powder, 2 parts of bactericide, and 2 parts of mildew inhibitor.

[0317] The national standard asphalt is national standard 70# asphalt;

[0318] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a linear structure and a melt flow rate of ≤2g / 10min;

[0319] The viscosity-increasing rubber is a mixture of natural rubber and styrene-butadiene rubber, and the mixing ratio is natural rubber:styrene-butadiene rubber=1:2.5;

[0320] The softening oil 2 is mineral oil;

[0321] The rubber activator is a phenolic rubber accelerator;

[0322] The talcum powder is 325 mesh talcum powder;

[0323] The bactericide is a dithiocarbamate;

[0324] The mildew inhibitor is ammonium persulfate.

[0325] The preparation method is as follows:

[0326] Step 1: put the amount of national standard asphalt and softened oil 2 into a stirring tank, heat it to a temperature of 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, and continue stirring for 60 minutes to obtain a mixture 1;

[0327] Step 2: Cool the mixture to 120±5° C., add the bactericide and mildew inhibitor in the amount, and stir for 60 minutes to obtain the high-viscosity, mildew-resistant and antibacterial modified asphalt rubber.

[0328] Comparative Example 4

[0329] A microcapsule mildew-resistant and antibacterial modified asphalt waterproofing membrane and a preparation method thereof, comprising the following structure: a base is in the middle of the membrane, microcapsule mildew-resistant and antibacterial modified asphalt rubber layers are arranged on both sides of the base, a high-viscosity modified asphalt rubber layer is arranged on the outside of the microcapsule mildew-resistant and antibacterial modified asphalt rubber, a PE hot-melt film is arranged on the lowermost side, and a PE hot-melt film is arranged on the upper side.

[0330] The tire base is a glass fiber reinforced polyester tire base with a thickness of 1.1 mm;

[0331] The microcapsule mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on both sides of the tire base with a thickness of 1.4 mm;

[0332] The high-viscosity modified asphalt rubber layer is hot-coated on the outer side of the microcapsule mildew-resistant and antibacterial modified asphalt rubber layer by a secondary oiling process, and the thickness is 0.3 mm;

[0333] The PE hot melt film is arranged on the outermost side of the coil and has a thickness of 0.010 mm;

[0334] The microcapsule mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 10 parts of rubber modifier, 10 parts of tackifying rubber, 20 parts of softening oil 1, 0.8 parts of rubber activator, 15 parts of talcum powder, 0.5 parts of wetting dispersant, and 2 parts of microcapsule mildew-resistant and antibacterial structure.

[0335] The national standard asphalt is a mixed asphalt of national standard 70# and 200#, and the mixed mass ratio is 70# asphalt: 200# asphalt = 100:20;

[0336] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a linear structure and a melt flow rate of ≤2g / 10min;

[0337] The viscosity-increasing rubber is powdered styrene-butadiene rubber;

[0338] The softening oil 1 is a rubber filler oil or base oil, with a pour point of ≤-25°C and a viscosity of 6000 mPa.s;

[0339] The rubber activator is an amide rubber accelerator;

[0340] The talcum powder is 600 mesh talcum powder;

[0341] The wetting and dispersing agent is an oily wetting and dispersing agent.

[0342] The preparation method is as follows:

[0343] Step 1: put the amount of national standard asphalt and softened oil 1 into a stirring tank, heat it to 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, continue stirring for 60 minutes, and obtain a mixture 1;

[0344] Step 2: Cool the mixture to 140±5° C., add the microcapsule structure and the wetting dispersant, and stir for 60 minutes to obtain the microcapsule mildew-resistant and antibacterial modified asphalt rubber.

[0345] The microcapsule mildew-resistant and antibacterial structure is prefabricated and is divided into a capsule core and a capsule wall. The mass ratio of the capsule core to the capsule wall is 2.0:10. The capsule wall is composed of 100 parts of PVA aqueous solution, 130 parts of fly ash, 4 parts of silane coupling agent, and 1 part of wetting dispersant. The capsule core is composed of 100 parts of bactericide, 110 parts of mildew inhibitor, 50 parts of dispersing oil, 2 parts of dispersant, and 2 parts of defoaming agent.

[0346] The PVA aqueous solution is prepared by mixing PVA powder and water at a mass ratio of 1:1 and stirring at high speed for 30 minutes to make them uniform;

[0347] The fly ash is 200 mesh fly ash;

[0348] The silane coupling agent is a methoxysilane coupling agent;

[0349] The wetting and dispersing agent is an oily wetting and dispersing agent;

[0350] The bactericide is a dithiocarbamate;

[0351] The mildew inhibitor is 2-pyridinethiol-1-zinc oxide;

[0352] The dispersed oil is tea tree oil;

[0353] The defoamer is a mineral oil defoamer;

[0354] The microcapsule antibacterial and mildew-resistant structure is prepared by the following process:

[0355] Step 1: uniformly mix the bactericide, mildew preventer, dispersing oil and dispersant in the above mentioned amounts according to the proportion, add defoaming agent after stirring for 30 minutes, and continue stirring for 30 minutes to obtain the microcapsule core component.

[0356] Step 2: Add PVA aqueous solution, fly ash, silane coupling agent, and dispersant to a high-speed dispersant in proportion, start stirring and mixing for 60 minutes to form a viscous powder, and drop the microcapsule core prepared in step 1 into the above-mentioned viscous powder at a certain rate according to the mass ratio, mix evenly, and obtain the microcapsule antibacterial and mildew-resistant structure after the powder coats the core.

[0357] Preferably, the high-viscosity modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 6 parts of rubber modifier, 12 parts of tackifying rubber, 30 parts of softening oil 2, 0.6 parts of rubber activator, and 35 parts of talcum powder.

[0358] The national standard asphalt is national standard 70# asphalt;

[0359] The rubber modifier is styrene-butadiene-styrene block copolymer (SBS) with a star-shaped structure and a melt flow rate of ≤2g / 10min;

[0360] The viscosity-increasing rubber is styrene-acrylic rubber;

[0361] The softening oil 2 is mineral oil;

[0362] The rubber activator is an amide rubber accelerator;

[0363] The talcum powder is 800 mesh talcum powder;

[0364] The preparation method is as follows:

[0365] Step 1: Put the amount of national standard asphalt and softened oil 2 into a mixing tank, heat it to a temperature of 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the mixing tank and start high-speed shearing, continue for 30 minutes and gradually increase the temperature to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, and continue stirring for 60 minutes to obtain the high-viscosity modified asphalt rubber.

[0366] Comparative Examples 5 and 6 are commercially available mildew-resistant modified asphalt waterproofing membranes with thicknesses of 3.0 and 4.0 mm, respectively;

[0367] The verification results of the embodiments and comparative examples are as follows:

[0368]

[0369] Note: Test standard: QBT 2591-2003 Test method and antibacterial effect of antibacterial plastics

[0370] Test 1: Antibacterial performance test (antibacterial rate %);

[0371] Test 2: Anti-fungal performance test (mold growth level);

[0372] Test 3: Antibacterial performance test after 30 days of artificial weathering (antibacterial rate %);

[0373] Test 4: Anti-fungal performance test after 30 days of artificial weathering (mildew growth level);

[0374] Test 5: Antibacterial performance test after 180 days of artificial weathering (antibacterial rate %);

[0375] Test 6: Anti-fungal performance test after 180 days of artificial weathering (mold growth level)

[0376] The above table shows the results of the mildew and antibacterial properties of the embodiments and the comparative examples. It can be seen from the above table that the embodiments 1-5 are microcapsule mildew and antibacterial modified asphalt waterproofing membranes designed using the technical solution described in the patent of the present invention, which can achieve the initial mildew resistance of the material and the long-term mildew resistance after aging, and meet the long-term sterilization and mildew resistance effect of mildew-resistant membranes for underground waterproofing projects.

[0377] Compared with Example 1, in Comparative Example 1, the entire roll material's rubber structure was prepared using a microcapsule antibacterial and mildew-resistant rubber layer, and no high-viscosity antibacterial and mildew-resistant modified asphalt rubber layer was set on the outside, so the initial mildew resistance of the material was unqualified.

[0378] Compared with Example 2, Comparative Example 2 removes the microcapsule mildew-resistant and antibacterial modified asphalt rubber layer in the structure of this patent and replaces it with an external high-viscosity mildew-resistant and antibacterial layer. The material can ensure good mildew-resistant and antibacterial effects in the initial stage, but after long-term artificial climate aging treatment, the bactericide and other effective ingredients in the sample are replaced and precipitated, resulting in a decrease in bacterial resistance.

[0379] In Comparative Example 3, compared with Example 3, the microcapsule anti-mildew and antibacterial structure in the structure of this patent is replaced by a conventional modified asphalt rubber without a microcapsule structure. The external high-viscosity anti-mildew and antibacterial layer material can ensure a good anti-mildew and antibacterial effect in the initial stage, but after long-term artificial climate aging treatment, the bactericide and other effective ingredients in the sample are replaced and precipitated, resulting in a decrease in bacteria resistance, and ultimately no anti-mildew and antibacterial effect.

[0380] Compared with Example 4, Comparative Example 4 replaces the outer high-viscosity, mildew-resistant and antibacterial modified asphalt rubber layer in this patent with a conventional high-viscosity rubber layer. The material does not have an antibacterial effect in the initial stage and fails to pass the antibacterial effect evaluation.

[0381] Comparative Examples 5 and 6 are commercially available mildew-resistant modified asphalt waterproof membranes, which have certain antibacterial properties in the initial stage, but do not have long-term antibacterial effects after aging.

[0382] The mildew-resistant and antibacterial modified asphalt roll uses microcapsule mildew-resistant and antibacterial technology and layered mildew-resistant and antibacterial design. The outer side of the roll is a high-viscosity mildew-resistant and antibacterial modified asphalt layer structure with conventional added bactericides and mildew inhibitors. The thickness is 0.3mm, which can withstand the mildew-resistant and antibacterial effect of the material in the 0-5 year waterproof application cycle. The inside is a 0.8-1.3mm microcapsule mildew-resistant and antibacterial asphalt coating. The capsule wall is made of a mixture of PVA aqueous solution and fly ash, coupling agent, etc., and the capsule core is made of a mixture of bactericides, mildew inhibitors, dispersed oil, etc. The microcapsule mildew-resistant and antibacterial structure is prefabricated. After prefabrication, the capsule wall forms a hard shell with filler to encapsulate the functional additives. It is mixed and added at low temperature in the later stage of the modified asphalt rubber processing and coated on the roll together with the rubber.

[0383] Once the roll material is used in water or humid areas, the conventional high-viscosity mildew-resistant and antibacterial coating structure on the outside will have a short-term bactericidal and mildew-proof effect in the initial period (2-5 years) after the waterproofing project is constructed. After a long time, the outer material is corroded and the functional additives are replaced and precipitated, resulting in the failure of the bactericidal and mildew-proof properties of the outer structure, causing corrosion on the outside of the material and degradation of performance. The water vapor that penetrates into the interior of the roll material will cause the capsule wall of the microcapsule structure to slowly swell when it meets water, resulting in cavities in the capsule wall, and the bactericidal and mildew-proof components in the capsule core will slowly precipitate to prevent the production and reproduction of bacteria for a long period of time (more than 5-20 years). At the same time, the combination of various sizes of microcapsule structures during the prefabrication process can control the swelling rate of the capsule wall and the release rate of the capsule core components, thereby achieving a continuous and long-term antibacterial and mildew-proof effect, and ensuring the effectiveness of the waterproofing effect of the waterproof roll material.

[0384] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A microcapsule mildew-resistant and antibacterial modified asphalt waterproofing membrane and a preparation method thereof, which is composed of the following structure: the middle part of the membrane is a base, microcapsule mildew-resistant and antibacterial modified asphalt rubber layers are arranged on both sides of the base, a high-viscosity mildew-resistant and antibacterial modified asphalt rubber layer is arranged on the outside of the microcapsule mildew-resistant and antibacterial modified asphalt rubber layer, a PE hot-melt film is arranged on the lowermost side, and a PE hot-melt film or mineral granules are arranged on the upper side.

2. A microcapsule mildew-resistant and antibacterial modified asphalt waterproofing membrane and preparation method according to claim 1, characterized in that: The tire base is a polyester tire base or a glass fiber reinforced polyester tire base, and the thickness is 0.8-1.3mm; The microcapsule mildew-resistant and antibacterial modified asphalt rubber layer is hot-coated on both sides of the tire base with a thickness of 0.8-1.8 mm; The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber layer is thermally coated on the outer side of the microcapsule mildew-resistant and antibacterial modified asphalt rubber layer by a secondary oiling process, and the thickness is 0.3 mm; The PE hot melt film and the mineral granules are arranged on the outermost side of the coil, the thickness of the PE hot melt film is 0.008-0.015mm, the mineral granules are one of quartz sand, sintered sand or shale flakes, and the thickness of the mineral granule layer is 0.2mm.

3. A microcapsule mildew-resistant and antibacterial modified asphalt waterproofing membrane and preparation method according to claim 1, characterized in that: The microcapsule mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 7-15 parts of rubber modifier, 6-10 parts of tackifying rubber, 15-30 parts of softening oil 1, 0.5-1 part of rubber activator, 15-20 parts of talcum powder, 0.5-1 part of wetting dispersant, and 2-3 parts of microcapsule mildew-resistant and antibacterial structure. The national standard asphalt is national standard 70# asphalt or a mixture of national standard 70# and 200# asphalt, and the mixing mass ratio is 70# asphalt: 200# asphalt = 100:10-30; The rubber modifier is a styrene-butadiene-styrene block copolymer (SBS) having a linear or star-shaped structure and a melt flow rate of ≤2g / 10min; The viscosity-increasing rubber is powder / granular styrene-butadiene rubber, or styrene-acrylic rubber, or a mixture of natural rubber and styrene-acrylic rubber / styrene-butadiene rubber, and the mixing ratio is natural rubber:styrene-acrylic rubber / styrene-butadiene rubber=1:2-3; The softening oil 1 is a rubber filler oil or a base oil, with a pour point of ≤-25°C and a viscosity of 2000-8000 mPa.s; The rubber activator is a phenolic or amide rubber accelerator; The talcum powder is 325-800 mesh talcum powder; The wetting and dispersing agent is an oily wetting and dispersing agent; The preparation method of the microcapsule mildew-resistant and antibacterial modified asphalt rubber is as follows: Step 1: put the amount of national standard asphalt and softened oil 1 into a stirring tank, heat it to 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, continue stirring for 60 minutes, and obtain a mixture 1; Step 2: Cool the mixture to 140±5° C., add the microcapsule mildew-resistant and antibacterial structure and the wetting dispersant, and stir for 60 minutes to obtain the microcapsule mildew-resistant and antibacterial modified asphalt rubber.

4. The microcapsule mildew-resistant and antibacterial modified asphalt waterproofing membrane and preparation method according to any one of claims 1 to 3, characterized in that: The microcapsule mildew-resistant and antibacterial structure is prefabricated and is divided into a capsule core and a capsule wall. The mass ratio of the capsule core to the capsule wall is 0.8-2.0:

10. The capsule wall is composed of 100 parts of PVA aqueous solution, 100-150 parts of fly ash, 3-5 parts of silane coupling agent, and 0.5-1 part of wetting dispersant. The capsule core is composed of 100 parts of bactericide, 80-120 parts of mildew inhibitor, 40-60 parts of dispersant oil, 1-2 parts of dispersant, and 1-2 parts of defoaming agent. The PVA aqueous solution is prepared by mixing PVA powder and water at a mass ratio of 1:1 and stirring at high speed for 30 minutes to make them uniform; The fly ash is 60-200 mesh fly ash; The silane coupling agent is an amino, methoxy or dimethoxy silane coupling agent; The wetting and dispersing agent is an oily wetting and dispersing agent; The fungicide is one of 1,2-benzisothiazolin-3-one, pentachlorophenol, dithiocarbamate, and 2-4-thiazolylbenzimidazole; The mildew inhibitor is one of o-phenylphenol, 2-pyridinethiol-1-zinc oxide, ammonium persulfate, and calcium phosphate; The dispersing oil is one of prickly ash oil, tea tree oil, mineral oil or lemon essential oil; The defoamer is a mineral oil defoamer; The microcapsule antibacterial and mildew-resistant structure is prepared by the following process: Step 1: uniformly mix the bactericide, mildewproofing agent, dispersing oil and dispersing agent in the above amount according to the proportion, add defoaming agent after stirring for 30 minutes, and continue stirring for 30 minutes to obtain the microcapsule core component; Step 2: Add the PVA aqueous solution, fly ash, silane coupling agent and dispersant to the high-speed dispersant in proportion, start stirring and mixing for 60 minutes to form a viscous powder, add the microcapsule core prepared in step 1 dropwise into the above-mentioned viscous powder according to the mass ratio, mix evenly, and obtain the microcapsule antibacterial and mildew-resistant structure after the powder covers the capsule core.

5. The microcapsule mildew-resistant and antibacterial modified asphalt waterproofing membrane and preparation method according to claim 1, characterized in that: The high-viscosity, mildew-resistant and antibacterial modified asphalt rubber is composed of the following components: 100 parts of national standard asphalt, 6-10 parts of rubber modifier, 10-15 parts of tackifying rubber, 25-35 parts of softening oil 2, 0.5-1 parts of rubber activator, 30-40 parts of talc, 2-3 parts of bactericide, and 2-3 parts of mildew inhibitor; The national standard asphalt is national standard 70# asphalt or a mixture of national standard 70# and 200# asphalt, and the mixing mass ratio is 70# asphalt: 200# asphalt = 100:10-30; The rubber modifier is a styrene-butadiene-styrene block copolymer (SBS) with a linear or star-shaped structure and a melt flow rate of ≤2g / 10min; The viscosity-increasing rubber is powder / granular styrene-butadiene rubber, or styrene-acrylic rubber, or a mixture of natural rubber and styrene-acrylic rubber / styrene-butadiene rubber, and the mixing ratio is natural rubber:styrene-butadiene rubber / styrene-acrylic rubber=1:2-3; The softening oil 2 is mineral oil; The rubber activator is a phenolic or amide rubber accelerator; The talcum powder is 325-800 mesh talcum powder; The fungicide is one of 1,2-benzisothiazolin-3-one, pentachlorophenol, dithiocarbamate, and 2-4-thiazolylbenzimidazole; The mildew inhibitor is one of o-phenylphenol, 2-pyridinethiol-1-zinc oxide, ammonium persulfate, and calcium phosphate; The preparation method of the highly sticky, mildew-resistant and antibacterial modified asphalt rubber is as follows: Step 1: put the amount of national standard asphalt and softened oil 2 into a stirring tank, heat it to a temperature of 160±5°C, add the amount of tackifying rubber, rubber modifier and rubber activator, open the stirring tank and start high-speed shearing, continue for 30 minutes and gradually heat up to 195±5°C, maintain the temperature for high-speed shearing for 60 minutes, add the amount of talcum powder, and continue stirring for 60 minutes to obtain a mixture 1; Step 2: Cool the mixture to 120±5° C., add the bactericide and mildew inhibitor in the amount, and stir for 60 minutes to obtain the high-viscosity, mildew-resistant and antibacterial modified asphalt rubber.

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