Composition for asphalt waterproofing coating, asphalt waterproofing coating, and method for preparing and use thereof

Abstract

The present application relates to the technical field of building waterproof material, and discloses a composition for asphalt waterproof coating, asphalt waterproof coating, and a preparation method and application thereof.The composition contains a main agent and an auxiliary agent; the main agent includes composite asphalt, filler combination, and antioxidant; the content of the filler combination is 30-50 parts by weight, the content of the antioxidant is 1.5-4 parts by weight, and the content of the auxiliary agent is 14-30 parts by weight, relative to 100 parts by weight of the composite asphalt; the composite asphalt is a combination of petroleum asphalt and vegetable asphalt; the filler combination is a combination of montmorillonite, sepiolite, and diatomite in a mass ratio of 1:1-4:1.5-6; the montmorillonite is loaded with copper ions at 0.5-4 mmol / g, and the diatomite is loaded with silver ions at 0.5-4 mmol / g.The waterproof coating provided by the present application can significantly improve the peel strength of the coiled material, weather resistance, and anti-aging performance, and can also have efficient mold-proof and antibacterial effects.

Description

Technical Field

[0001] This invention relates to the field of building waterproofing materials technology, specifically to a composition for asphalt waterproofing coatings, an asphalt waterproofing coating, its preparation method, and its application. Background Technology

[0002] Traditional bitumen waterproof membranes are waterproof materials composed of bitumen, SBS modifier, fillers, and other modifiers. They are widely used in building systems due to their resistance to high and low temperatures and excellent waterproofing effect; however, their application in exposed and humid environments is limited due to insufficient weather resistance and other issues.

[0003] Currently, asphalt waterproof membranes rely on petroleum-based raw materials, and in order to improve weather resistance and anti-aging properties, UV-resistant additives and sun-protective films are often used. Although this method can improve weather resistance, the adhesion will decrease after exposure to sunlight, and the membrane will also discolor, making it unsuitable for long-term use in exposed or humid environments.

[0004] In addition, current asphalt waterproof membranes also suffer from insufficient anti-mildew and antibacterial properties, leading to mold growth, blistering, and water seepage. Commonly used chemical antibacterial agents have short-lasting antibacterial effects, are highly toxic, and easily volatilize, causing migration and pollution. Furthermore, the addition of chemical antibacterial agents can reduce the membrane's adhesive properties, resulting in waterproof membranes that fail to meet the requirements for basic mechanical properties such as the bond strength between the membrane and the cementitious substrate.

[0005] Therefore, there is an urgent need to develop a type of asphalt waterproof membrane that combines weather resistance, anti-aging properties, low carbon emissions, environmental friendliness, and high-efficiency mildew and antibacterial properties to meet various complex conditions such as exposure, bonding, mildew prevention, weather resistance, and moisture resistance. Summary of the Invention

[0006] The purpose of this invention is to solve the problems of low peel strength, poor weather resistance and anti-aging effect, and inability to achieve efficient anti-mildew and antibacterial effects when existing asphalt waterproof coatings are applied to waterproof membranes.

[0007] To achieve the above objectives, a first aspect of the present invention provides a composition for asphalt waterproofing coating, the composition comprising a main agent and an auxiliary agent; said main agent includes composite asphalt, a filler combination, and an antioxidant;

[0008] Relative to 100 parts by weight of the composite asphalt, the content of the filler combination is 30-50 parts by weight, the content of the antioxidant is 1.5-4 parts by weight, and the content of the additives is 14-30 parts by weight.

[0009] The composite asphalt is a combination of petroleum asphalt and plant asphalt with a mass ratio of 1:0.5-1.

[0010] The filler combination is a combination of montmorillonite, sepiolite and diatomaceous earth in a mass ratio of 1:1-4:1.5-6; the montmorillonite is loaded with 0.5-4 mmol / g of copper ions and the diatomaceous earth is loaded with 0.5-4 mmol / g of silver ions.

[0011] A second aspect of the present invention provides a method for preparing an asphalt waterproof coating, the method being carried out using the composition described in the first aspect, comprising:

[0012] (1) Petroleum asphalt and plant asphalt are mixed for the first time to obtain the first material;

[0013] (2) The antioxidant, additives, fillers and the first material are mixed for a second time to obtain the asphalt waterproof coating.

[0014] A third aspect of the present invention provides an asphalt waterproof coating prepared by the method described in the second aspect.

[0015] The fourth aspect of the present invention provides the application of the bitumen waterproofing coating described in the third aspect in building waterproofing membranes.

[0016] This invention uses a composite matrix of petroleum asphalt and plant asphalt in a specific ratio as the base, and combines it with a composite filler of diatomaceous earth-sepiolite-montmorillonite with a specific amount of copper ions, antioxidants and additives, which can achieve synergistic effects between the components. The resulting waterproof coating, when applied to waterproof membranes, can significantly improve the peel strength, weather resistance and anti-aging performance of the membranes, while also providing efficient anti-mildew and antibacterial effects. Detailed Implementation

[0017] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0018] As previously described, a first aspect of the present invention provides a composition for an asphalt waterproof coating, the composition comprising a main agent and an additive; the main agent includes composite asphalt, a filler combination, and an antioxidant;

[0019] Relative to 100 parts by weight of the composite asphalt, the content of the filler combination is 30-50 parts by weight, the content of the antioxidant is 1.5-4 parts by weight, and the content of the additives is 14-30 parts by weight.

[0020] The composite asphalt is a combination of petroleum asphalt and plant asphalt with a mass ratio of 1:0.5-1.

[0021] The filler combination is a combination of montmorillonite, sepiolite and diatomaceous earth in a mass ratio of 1:1-4:1.5-6; the montmorillonite is loaded with 0.5-4 mmol / g of copper ions and the diatomaceous earth is loaded with 0.5-4 mmol / g of silver ions.

[0022] It should be noted that the plant asphalt in this invention refers to asphaltenes extracted from plants, which are byproducts obtained during the distillation of vegetable oils, accounting for about 3-5 wt% of the vegetable oil mass fraction. Its main components are 60-80 wt% fatty acids and phytosterols; the plants can be selected from soybeans, corn, and cottonseed.

[0023] Preferably, the operation of loading copper ions onto montmorillonite is carried out using a method comprising the following steps:

[0024] SI-1: Mix montmorillonite with an ethanol solution of a silane coupling agent to obtain a first product solid phase; the concentration of the ethanol solution of the silane coupling agent is 4-6 wt%; the mixing conditions include: a temperature of 70-90℃ and a time of 20-40 min; the mass ratio of the montmorillonite to the ethanol solution of the silane coupling agent is 1:5-10.

[0025] SI-2: The copper ion solution is mixed with the first product solid phase II, and the resulting product is washed with water and dried in sequence to obtain copper-loaded montmorillonite; the copper ion concentration of the copper ion solution is 0.05-0.2 mol / L.

[0026] In this invention, the copper ion-loaded montmorillonite preparation method can achieve a target range of copper ion loading by adjusting the mass ratio of the copper ion solution to the first product solid phase in step SI-2 and / or by adjusting the mixing conditions II. The final amount of loaded copper ions is detected by AAS or ICP-OES. Further details of this invention are omitted here, and should not be construed as limiting the invention by those skilled in the art.

[0027] Preferably, the preparation conditions of montmorillonite loaded with 0.5-4 mmol / g copper ions provided by the present invention include: the mass ratio of the first product solid phase to the copper ion solution is 1:5-10; the temperature of mixing II is 40-60℃ and the time is 0.5-4h.

[0028] Preferably, the operation of loading silver ions onto diatomaceous earth is carried out using a method comprising the following steps:

[0029] SII-1: Diatomaceous earth and an ethanol solution of a silane coupling agent are contact-mixed (I) to obtain product I solid phase; the concentration of the ethanol solution of the silane coupling agent is 4-6 wt%; the contact-mixing conditions include: temperature of 70-90℃, time of 20-40 min; the mass ratio of diatomaceous earth to the ethanol solution of the silane coupling agent is 1:5-10.

[0030] SII-2: The silver ion solution is contact-mixed with the solid phase of product I, and the resulting product is washed with water and dried in sequence to obtain diatomaceous earth loaded with silver ions; the concentration of silver ions in the silver ion solution is 0.05-0.2 mol / L.

[0031] In this invention, in the method for preparing silver-loaded diatomaceous earth, the target range of silver ion loading can be obtained by adjusting the mass ratio of silver ion solution to solid product I in step SII-2 and / or adjusting the conditions of contact mixing II. The final amount of silver ions loaded is detected by AAS or ICP-OES. This invention will not be elaborated further here, and those skilled in the art should not understand it as a limitation of the invention.

[0032] Preferably, the preparation conditions of the diatomaceous earth loaded with 0.5-4 mmol / g of silver ions provided by the present invention include: the mass ratio of product I solid phase to silver ion solution is 1:5-10; the contact mixing II temperature is 40-60℃ and the time is 2-4h.

[0033] Preferably, relative to 100 parts by weight of the composite asphalt, the content of the filler combination is 35-45 parts by weight, the content of the antioxidant is 2-3 parts by weight, and the content of the additives is 14-30 parts by weight.

[0034] Preferably, the antioxidant is p-tert-butylcatechol.

[0035] Preferably, the additives include dispersants, plasticizers, silane coupling agents, and zinc oxide.

[0036] More preferably, relative to 100 parts by weight of the composite asphalt, the content of the filler combination is 35-45 parts by weight, the content of p-tert-butylcatechol is 2-3 parts by weight, the content of the dispersant is 2-6 parts by weight, the content of the plasticizer is 6-10 parts by weight, the content of the silane coupling agent is 2-4 parts by weight, and the content of zinc oxide is 4-8 parts by weight.

[0037] In a preferred embodiment, the dispersant is selected from at least one of stearic acid and oleic acid; the plasticizer is selected from at least one of dioctyl phthalate and epoxidized soybean oil; and the silane coupling agent is selected from at least one of KH-560 and KH-550.

[0038] In a preferred embodiment, the composite asphalt is a combination of petroleum asphalt and plant asphalt with a mass ratio of 1:0.6-0.8. The inventors have discovered that, under this preferred embodiment, the waterproof coating obtained by the present invention, when applied to waterproof membranes, exhibits superior peel strength, weather resistance, and anti-aging properties.

[0039] Preferably, the petroleum asphalt has a penetration of 60-80 and a softening point of ≥45℃.

[0040] Preferably, the plant bitumen has a penetration of >200 and a soluble content of ≥98wt%.

[0041] It should be noted that, in this invention, penetration refers to the depth to which a standard needle vertically penetrates the asphalt sample under a load of 100 grams at 25°C for 1 hour, expressed in units of 1 / 10 millimeters.

[0042] It should be noted that the soluble content of the plant asphalt refers to the soluble components of the material in trichloroethylene.

[0043] Preferably, the filler combination is a combination of montmorillonite, sepiolite and diatomaceous earth in a mass ratio of 1:1.5-3:4-6.

[0044] More preferably, the montmorillonite is loaded with 1-1.5 mmol / g of copper ions.

[0045] More preferably, the diatomaceous earth is loaded with 2-2.5 mmol / g of silver ions. The inventors have found that, under this preferred embodiment, the waterproof coating obtained by the present invention, when applied to waterproof membranes, exhibits superior peel strength, weather resistance, anti-aging properties, and anti-mildew and antibacterial effects.

[0046] In a preferred embodiment, the average particle diameter of the montmorillonite is 10-20 μm, the average particle diameter of the sepiolite is 25-35 μm, and the average particle diameter of the diatomaceous earth is 40-50 μm. The inventors have found that, under this preferred embodiment, the waterproof coating obtained by the present invention, when applied to waterproof membranes, exhibits superior peel strength, weather resistance, anti-aging properties, and anti-mildew and antibacterial effects.

[0047] As previously described, a second aspect of the present invention provides a method for preparing an asphalt waterproof coating, the method being carried out using the composition described in the first aspect, comprising:

[0048] (1) Petroleum asphalt and plant asphalt are mixed for the first time to obtain the first material;

[0049] (2) The antioxidant, additives, fillers and the first material are mixed for a second time to obtain the asphalt waterproof coating.

[0050] Preferably, the first mixing is carried out under stirring conditions, which include: a temperature of 120-130°C, a time of 10-15 min, and a stirring speed of 200-500 rpm.

[0051] Preferably, the second mixing is carried out under stirring conditions, which include: a temperature of 130-140°C, a time of 30-60 min, and a stirring speed of 1800-2200 rpm.

[0052] As previously stated, a third aspect of the present invention provides an asphalt waterproof coating prepared by the method described in the second aspect.

[0053] As previously stated, the fourth aspect of the present invention provides the application of the bitumen waterproofing coating described in the third aspect in building waterproofing membranes.

[0054] The present invention will be described in detail below through examples.

[0055] Unless otherwise specified, all reagents and raw materials used in the following examples are commercially available products, and all reagents are analytical grade products. The average diameter of the target particles used in the following examples was obtained by sieving.

[0056] raw material

[0057] Petroleum asphalt I: Penetration of 70 (0.1 mm) at 25℃, softening point of 48℃, grade (model): 70#, purchased from Shandong Haiyun Asphalt Co., Ltd.; (Incoming inspection: the penetration test standard is GB / T 4509-2010).

[0058] Petroleum asphalt II: Penetration at 25℃ is 364 (in 0.1 mm), grade (model): F400, purchased from Shandong Haiyun Asphalt Co., Ltd.; (Incoming inspection: the penetration test standard is GB / T 4509-2010).

[0059] Plant-based bitumen I: Penetration of 480 (0.1 mm) at 25℃, soluble content of 99.5 wt%, purchased from Hengshui Diyi Petrochemical Co., Ltd. (Incoming inspection: Penetration test standard is GB / T 4509-2010).

[0060] Plant-based bitumen II: Penetration at 25℃ is 195 (0.1 mm), soluble content is 98.7 wt%, grade (model): cashew plant-based bitumen, purchased from Boxing County Deyi Trading Co., Ltd.; (Incoming inspection: penetration test standard is GB / T 4509-2010).

[0061] Antioxidant: p-tert-butylcatechol;

[0062] Dispersant: Stearic acid;

[0063] Silane coupling agent: KH-560;

[0064] Plasticizer: Dioctyl phthalate;

[0065] Sepiolite I: Average particle diameter is 30μm mesh, grade (model): sepiolite, purchased from Lingshou County Wanzhu Mineral Products Co., Ltd.

[0066] Montmorillonite I: average particle diameter is 15μm, grade (model): activated montmorillonite, purchased from Sishui Hengjian Bentonite Co., Ltd.

[0067] Montmorillonite II: average particle diameter is 30μm, grade (model): superior, purchased from Lingshou County Shengbang Mineral Products Processing Plant;

[0068] Diatomaceous earth I: average particle diameter is 45μm, grade (model): yellow, purchased from Lingshou County Baixin New Material Technology Co., Ltd.;

[0069] Diatomite II: average particle diameter is 35μm, grade (model): lightweight, purchased from Lingshou County Xuhai Mineral Products Trading Co., Ltd.

[0070] Preparation Example I-1

[0071] This preparation example is used to prepare montmorillonite I with a copper ion loading of 1.5 mmol / g.

[0072] (1) Montmorillonite I was mixed with an ethanol solution of silane coupling agent KH560 to obtain a first product solid phase; the concentration of the ethanol solution of the silane coupling agent was 5 wt%; the conditions for mixing I were: ultrasonic frequency of 30 kHz, temperature of 80 ℃, and time of 30 min; the mass ratio of the amount of montmorillonite to the ethanol solution of the silane coupling agent was 1:8.

[0073] SI-2: The copper sulfate solution was mixed with the first product solid phase II, and the resulting product was washed with water and dried sequentially to obtain montmorillonite I with a loading of 1.5 mmol / g, named ZI-1; the copper ion concentration of the copper sulfate solution was 0.1 mol / L; the mass ratio of the first product solid phase to the copper ion solution was 1:8; the mixing temperature II was 50℃ and the time was 2h.

[0074] Preparation Example I-2

[0075] This preparation example is used to prepare montmorillonite I with a copper ion loading of 2 mmol / g.

[0076] (1) Montmorillonite I was mixed with an ethanol solution of silane coupling agent KH560 to obtain a first product solid phase; the concentration of the ethanol solution of the silane coupling agent was 5 wt%; the conditions for mixing I were: ultrasonic frequency of 30 kHz, temperature of 80 ℃, and time of 30 min; the mass ratio of the amount of montmorillonite to the ethanol solution of the silane coupling agent was 1:6.

[0077] SI-2: The copper sulfate solution was mixed with the first product solid phase II, and the resulting product was washed with water and dried sequentially to obtain montmorillonite I with a loading of 2 mmol / g, named ZI-2; the copper ion concentration of the copper sulfate solution was 0.1 mol / L; the mass ratio of the first product solid phase to the copper ion solution was 1:6; the mixing temperature II was 50℃ and the time was 3h.

[0078] Preparation Example I-3

[0079] This preparation example is used to prepare montmorillonite II with a copper ion loading of 1.5 mmol / g.

[0080] The procedure was similar to that of Preparation Example I-1, except that montmorillonite I in Preparation Example I-1 was replaced with an equal mass of montmorillonite II. All other steps were the same as in Preparation Example I-1. Montmorillonite II with a copper ion loading of 1.5 mmol / g was prepared and named ZI-3.

[0081] Preparation example of DI

[0082] This preparation example is used to prepare montmorillonite I with a copper ion loading of 4.5 mmol / g.

[0083] (1) Montmorillonite I was mixed with an ethanol solution of silane coupling agent KH560 to obtain a first product solid phase; the concentration of the ethanol solution of the silane coupling agent was 5 wt%; the conditions for mixing I were: ultrasonic frequency of 30 kHz, temperature of 80 ℃, and time of 30 min; the mass ratio of the amount of montmorillonite to the ethanol solution of the silane coupling agent was 1:4.

[0084] SI-2: The copper sulfate solution was mixed with the first product solid phase II, and the resulting product was washed with water and dried sequentially to obtain montmorillonite I with a loading of 4.5 mmol / g, named DZI; the copper ion concentration of the copper sulfate solution was 0.1 mol / L; the mass ratio of the first product solid phase to the copper ion solution was 1:4; the mixing temperature II was 50℃ and the time was 4h.

[0085] Preparation Example II-1

[0086] This preparation example is used to prepare diatomaceous earth I with a silver ion loading of 2 mmol / g.

[0087] (1) Diatomaceous earth I and ethanol solution of silane coupling agent KH560 are contacted and mixed to obtain product I solid phase; the concentration of ethanol solution of silane coupling agent is 5wt%; the conditions of contact mixing I are: ultrasonic frequency of 30kHz, temperature of 80℃, time of 30min; the mass ratio of diatomaceous earth to ethanol solution of silane coupling agent is 1:6.

[0088] SI-2: The silver nitrate solution was contact-mixed with the solid phase of product I (II), and the resulting product was washed with water and dried sequentially to obtain diatomaceous earth I with a loading of 2 mmol / g, named ZII-1; the silver ion concentration of the silver nitrate solution was 0.1 mol / L; the mass ratio of the solid phase of product I to the silver ion solution was 1:6; the contact-mixing temperature (II) was 50℃ and the time was 2 h.

[0089] Preparation Example II-2

[0090] This preparation example is used to prepare diatomaceous earth II with a silver ion loading of 2 mmol / g.

[0091] The procedure was similar to that of Preparation Example II-1, except that diatomaceous earth I in Preparation Example II-1 was replaced with an equal mass of diatomaceous earth II. All other steps were the same as in Preparation Example II-1. Diatomaceous earth II with a silver ion loading of 2 mmol / g was prepared and named ZII-2.

[0092] Preparation Example D-II

[0093] This preparation example is used to prepare diatomaceous earth I with a silver ion loading of 4.5 mmol / g.

[0094] (1) Diatomaceous earth I is contacted and mixed with an ethanol solution of silane coupling agent KH560 to obtain product I solid phase; the concentration of the ethanol solution of silane coupling agent is 5wt%; the conditions for contact mixing I are: ultrasonic frequency of 30kHz, temperature of 80℃, and time of 30min; the mass ratio of diatomaceous earth to ethanol solution of silane coupling agent is 1:4.

[0095] SI-2: The silver nitrate solution was contact-mixed with the solid phase of product I (II), and the resulting product was washed with water and dried to obtain diatomaceous earth I with a loading of 4.5 mmol / g, named DZII; the silver ion concentration of the silver nitrate solution was 0.1 mol / L; the mass ratio of the solid phase of product I to the silver ion solution was 1:4; the contact-mixing temperature (II) was 50℃ and the time was 4 h.

[0096] Example 1

[0097] This embodiment illustrates how the asphalt waterproof coating provided by the present invention is prepared according to the formula in Table 1 and by a method including the following steps:

[0098] (1) Petroleum asphalt and plant asphalt are mixed for the first time to obtain the first material; the conditions for the first mixing are: temperature of 125℃, time of 15min, and stirring speed of 400rpm.

[0099] (2) The antioxidant, additives, fillers and the first material are mixed in a second mixture to obtain the asphalt waterproof coating S1; the conditions for the second mixing are: time is 50 min, temperature is 140℃ and stirring speed is 2000 rpm.

[0100] Unless otherwise specified, the remaining examples follow a similar process to Example 1, except that the formulations used in each example are different, as detailed in Table 1 (Note: Parameters not listed in Table 1 are the same as those in Example 1).

[0101] Table 1

[0102]

[0103] Example 4

[0104] This embodiment follows a similar process to Embodiment 1. The difference is that in this embodiment, the amount of composite asphalt is controlled in the same way as in Embodiment 1, but the composite asphalt is a combination of petroleum asphalt I and plant asphalt I with a mass ratio of 1:1.

[0105] Everything else is the same as in Example 1.

[0106] Asphalt waterproof coating S4 was prepared.

[0107] Example 5

[0108] This embodiment follows a similar process to Embodiment 1, except that in this embodiment, petroleum asphalt II of equal mass is used to replace petroleum asphalt I in Embodiment 1.

[0109] Everything else is the same as in Example 1.

[0110] Asphalt waterproof coating S5 was prepared.

[0111] Example 6

[0112] This embodiment follows a similar process to that of Embodiment 1. The difference is that in this embodiment, an equal mass of plant bitumen II is used to replace plant bitumen I in Embodiment 1.

[0113] Everything else is the same as in Example 1.

[0114] Asphalt waterproof coating S6 was prepared.

[0115] Example 7

[0116] This embodiment follows a similar process to Example 1. The difference is that in this embodiment, the amount of packing material used is the same as in Example 1, but the packing material is a combination of montmorillonite, sepiolite I, and diatomaceous earth in a mass ratio of 1:2:2. The montmorillonite is ZI-1 obtained in Preparation Example I-1 (same as Example 1), and the diatomaceous earth is ZII-1 obtained in Preparation Example II-1 (same as Example 1).

[0117] Everything else is the same as in Example 1.

[0118] Asphalt waterproof coating S7 was prepared.

[0119] Example 8

[0120] This embodiment follows a similar process to Example 1. The difference is that, in this embodiment, montmorillonite I (ZI-2) with a copper ion loading of 2 mmol / g obtained from Preparation Example I-2 is used instead of ZI-1 in Example 1.

[0121] Everything else is the same as in Example 1.

[0122] Asphalt waterproof coating S8 was prepared.

[0123] Example 9

[0124] This embodiment follows a similar process to Example 1. The difference is that, in this embodiment, montmorillonite II (ZI-3) with a copper ion loading of 1.5 mmol / g obtained from Preparation Example I-3 is used instead of ZI-1 in Example 1.

[0125] Everything else is the same as in Example 1.

[0126] Asphalt waterproof coating S9 was prepared.

[0127] Example 10

[0128] This embodiment follows a similar process to Example 1. The difference is that, in this embodiment, diatomaceous earth II (ZII-2) with a silver ion loading of 2 mmol / g obtained from Preparation Example II-2 is used instead of ZII-1 in Example 1.

[0129] Everything else is the same as in Example 1.

[0130] Asphalt waterproof coating S10 was prepared.

[0131] Comparative Example 1

[0132] This comparative example was conducted using a similar procedure to Example 1. The difference was that this comparative example used an equal mass of montmorillonite I (DZI) with a copper ion loading of 4.5 mmol / g obtained from Preparation Example DI to replace ZI-1 in Example 1.

[0133] Everything else is the same as in Example 1.

[0134] Asphalt waterproof coating D1 was prepared.

[0135] Comparative Example 2

[0136] This comparative example was conducted using a similar procedure to Example 1. The difference was that this comparative example used an equal mass of diatomaceous earth I (DZII) with a silver ion loading of 4.5 mmol / g obtained from Preparation Example D-II to replace ZII-1 in Example 1.

[0137] Everything else is the same as in Example 1.

[0138] Asphalt waterproof coating D2 was prepared.

[0139] Comparative Example 3

[0140] This comparative example follows a similar process to Example 1. The difference is that the amount of filler used in this comparative example is the same as in Example 1, and the ratio of montmorillonite to diatomite is also the same as in Example 1. However, sepiolite is not used in this comparative example.

[0141] Everything else is the same as in Example 1.

[0142] Asphalt waterproof coating D3 was prepared.

[0143] Comparative Example 4

[0144] This comparative example follows a similar process to Example 1. The difference is that the amount of filler used in this comparative example is the same as in Example 1, but the filler combination is a combination of montmorillonite, sepiolite I, and diatomaceous earth in a mass ratio of 1:2:8. The montmorillonite is ZI-1 obtained in Preparation Example I-1 (same as Example 1), and the diatomaceous earth is ZII-1 obtained in Preparation Example II-1 (same as Example 1).

[0145] Everything else is the same as in Example 1.

[0146] Asphalt waterproof coating D4 was prepared.

[0147] Comparative Example 5

[0148] This comparative example follows a similar procedure to Example 1, except that copper ions and silver ions are added separately for mixing. The specific steps are as follows:

[0149] (1) Petroleum asphalt and plant asphalt are mixed for the first time to obtain the first material;

[0150] (2) The antioxidant, additives, montmorillonite I, sepiolite I, diatomaceous earth I, copper sulfate solution, silver nitrate solution and the first material are mixed for the second time to obtain the asphalt waterproof coating D5; wherein, the amount of montmorillonite I is the same as ZI-1 in Example 1, the amount of diatomaceous earth I is the same as ZII-1 in Example 1, the amount of copper sulfate solution in terms of the molar amount of copper ions is the same as the total molar amount of copper ions loaded on montmorillonite I in Example 1, and the amount of silver nitrate solution in terms of the molar amount of silver ions is the same as the total molar amount of silver ions loaded on diatomaceous earth I in Example 1.

[0151] Everything else is the same as in Example 1.

[0152] Asphalt waterproof coating D5 was prepared.

[0153] Test case

[0154] The asphalt waterproof coating prepared in the aforementioned example was applied to the substrate (average coating amount was 3000 g / m²). 2 After being compacted by calendering rollers (average pressure of 1 MPa), the material is slit and wound up to obtain a waterproof membrane. The following performance tests are then performed on the obtained waterproof membrane:

[0155] 1. Test on the peel strength performance of the roll material and cement mortar.

[0156] The test was conducted according to 5.16.1 of the test standard GB / T35467-2017 (Note: This test mainly observes the degree of damage to the adhesive after the roll material is bonded to the cement mortar, so it is expressed as a percentage. The higher the degree of damage, the better the bond).

[0157] 2. UV aging resistance test.

[0158] The bonding performance after UV irradiation treatment was tested according to test standard GB / T23457-2017, section 6.20.4. (Note: This test mainly observes the degree of damage to the bond between the roll material and cement mortar, so it is expressed as a percentage. The higher the degree of damage, the better the bond.)

[0159] 3. Low-temperature flexibility and aging resistance test.

[0160] The testing standard is GB / T35467-2017.

[0161] 4. Anti-mildew and antibacterial performance test.

[0162] The testing standard is GB / T 1741-2020 mold resistance grade (0>1>2).

[0163] The test results are shown in Table 2.

[0164] Table 2

[0165]

[0166] As can be seen from the results in Table 2, the asphalt waterproof coating provided by the present invention has excellent peel strength, weather resistance and anti-aging effect when applied to waterproof membrane, and also has a high-efficiency anti-mildew and antibacterial effect.

[0167] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A composition for asphalt waterproofing paint, characterized by, The composition contains a main agent and an auxiliary agent; the main agent includes compound asphalt, filler combination, antioxidant; The content of the filler combination is 30-50 parts by weight, the content of the antioxidant is 1.5-4 parts by weight, and the content of the auxiliary agent is 14-30 parts by weight, relative to 100 parts by weight of the compound asphalt; The compound asphalt is a combination of petroleum asphalt and vegetable asphalt with a content mass ratio of 1:0.5-1; The filler combination is a combination of montmorillonite, sepiolite and diatomite with a content mass ratio of 1:1-4:1.5-6; the montmorillonite is loaded with 0.5-4 mmol / g of copper ions, and the diatomite is loaded with 0.5-4 mmol / g of silver ions; wherein the operation of loading copper ions on the montmorillonite or loading silver ions on the diatomite is carried out by a method comprising the following steps: (1) mixing I the diatomite with an ethanol solution of silane coupling agent to obtain product I solid phase; or mixing I the montmorillonite with an ethanol solution of silane coupling agent to obtain first product solid phase; (2) mixing II the silver ion solution with the product I solid phase, and then washing with water and drying to obtain diatomite loaded with silver ions; or mixing II the copper ion solution with the first product solid phase, and then washing with water and drying to obtain montmorillonite loaded with copper ions.

2. The composition of claim 1, wherein, The content of the filler combination is 35-45 parts by weight, the content of the antioxidant is 2-3 parts by weight, and the content of the auxiliary agent is 14-30 parts by weight, relative to 100 parts by weight of the compound asphalt.

3. The composition of claim 2, wherein, The auxiliary agent includes dispersant, plasticizer, silane coupling agent, zinc oxide.

4. The composition of claim 2, wherein, The antioxidant is p-tert-butyl catechol.

5. The composition according to claim 1 or 2, characterized in that, The compound asphalt is a combination of petroleum asphalt and vegetable asphalt with a content mass ratio of 1:0.6-0.8; And / or, the penetration of the petroleum asphalt is 60-80, and the softening point is ≥45℃; And / or, the vegetable asphalt has a penetration of >200 and a soluble content of ≥98wt%.

6. The composition of claim 1, wherein, The filler combination is a combination of montmorillonite, sepiolite and diatomite with a content mass ratio of 1:1.5-3:4-6.

7. The composition of claim 6, wherein, The montmorillonite is loaded with 1-1.5 mmol / g of copper ions; And / or, the diatomite is loaded with 2-2.5 mmol / g of silver ions.

8. The composition of claim 7, wherein, The average particle diameter of the montmorillonite is 10-20 μm, the average particle diameter of the sepiolite is 25-35 μm, and the average particle diameter of the diatomite is 40-50 μm.

9. A method for preparing an asphaltic waterproofing coating, characterized by, The method applies the composition of any one of claims 1-8, comprising: (1) first mixing petroleum asphalt and vegetable asphalt to obtain first material; (2) second mixing antioxidant, auxiliary agent, filler combination and the first material to obtain the asphalt waterproof coating.

10. The method of claim 9, wherein, The first mixing is carried out under stirring, and the conditions of the first mixing include: temperature of 120-130℃, time of 10-15 min, and stirring speed of 200-500 rpm; And / or, the second mixing is carried out under stirring conditions, the conditions of the second mixing comprising: temperature of 130-140℃, time of 30-60min, stirring speed of 1800-2200rpm.

11. The asphalt waterproof coating prepared by the method of claim 9 or 10.

12. The use of the asphalt waterproof coating of claim 11 in building waterproofing membranes.

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