A novel waterproofing roll and its preparation method

Abstract

The invention discloses a novel waterproof coiled material and a preparation method thereof, and relates to the technical field of building waterproof materials, wherein the waterproof coiled material comprises a porous modified asphalt layer; wherein, in the order of product structure from top to bottom, the porous modified asphalt layer is located at the second layer and the fourth layer of the waterproof coiled material; the components and weight fractions of the porous modified asphalt layer include: 20-35 parts of matrix asphalt A, 20-35 parts of matrix asphalt B, 8-12 parts of SBS, 1-2 parts of plasticizer, 7-13 parts of viscosity reducer, 10-14 parts of rubber, 2-4 parts of foaming agent, 1-2 parts of foaming aid, 13-18 parts of thermal insulation material and 13-18 parts of proppant. The introduction of the foaming agent, proppant and thermal insulation material of the present invention can greatly reduce the thermal conductivity of the modified asphalt, and achieve the effect of the thermal insulation material; at the same time, the introduction of the foaming agent, and the proppant and thermal insulation material replacing the common filler can greatly reduce the density of the modified asphalt, reduce production energy consumption, improve production efficiency, and reduce the weight of the finished coiled material.

Description

Technical Field

[0001] The invention relates to the technical field of building waterproof materials, and in particular to a novel waterproof coiled material and a preparation method thereof. Background Art

[0002] At present, there are two important functional systems in the building system, one is the waterproof system and the other is the thermal insulation system. The two need to cooperate with each other to make the building have good thermal insulation and waterproof effects. In actual construction, the construction of each system needs to be completed in sequence, which is not only inefficient, long in construction period, and high in cost, but also the joints between layers and layers will affect the quality of the final house construction.

[0003] The most commonly used material in waterproof systems is modified asphalt waterproofing membrane, and its waterproofing effect has been widely recognized. However, it has a high thermal conductivity and poor thermal insulation performance, making it unsuitable for use as an insulation layer; and most membranes on the market currently have a high density, which adds a lot of burden to transportation and construction.

[0004] Most of the insulation materials commonly used in the construction field have low thermal conductivity, low density and a large number of open pore structures. They themselves have poor waterproof performance and are prone to leaving gaps during construction, which reduces the waterproof and thermal insulation effects.

[0005] Patent CN107501969A discloses "a foaming viscosity-reducing warm-mix agent and its preparation method", which uses natural zeolite as a hydrated framework aluminosilicate, and arranges it into an open crystal skeleton with a certain shape according to a certain rule. There are channels and holes on the skeleton that absorb a large number of water molecules. The binding force between these water molecules and the skeleton is weak, and the water can escape after heating. The use of alkaline solution treatment can effectively remove gel impurities in natural zeolite and significantly increase the water content of natural zeolite. Then, through the treatment of fatty amine solution, the adhesion between natural zeolite and asphalt can be improved, the water stability of asphalt mixture can be improved, and a small amount of water can be introduced in conjunction with a highly absorbent resin. Foamed asphalt is generated by the contact between water and hot asphalt, so that asphalt and aggregate are well wrapped together at a lower temperature, improving the high and low temperature performance of asphalt, and improving the durability and fatigue resistance of asphalt.

[0006] Patent CN111138121A discloses "a foamed asphalt containing sodium hypochlorite oxidized waste tire rubber powder", which is prepared from the following raw materials in parts by weight: 40-60 parts of SBS modified asphalt, 10-15 parts of zeolite powder / ZnO composite, 20-30 parts of ordinary Portland cement, 12-18 parts of sodium hypochlorite oxidized waste tire rubber powder, 10-20 parts of fly ash, 1-5 parts of sulfolactone type foaming agent, 0.1-1 parts of glycidyl methacrylate, 5-10 parts of dimethyl phthalate, 1-3 parts of hydroxypropyl methylcellulose, 20-30 parts of basalt stone, 50-60 parts of aggregate, 2-4 parts of pentaerythritol, 5-10 parts of reinforcing fiber, and 12-15 parts of binder. Among them, SBS in SBS modified asphalt is a styrene-based thermoplastic elastomer, which is a styrene-butadiene-styrene triblock copolymer. The addition of zeolite powder / ZnO complex is due to the presence of cavities and channels of uniform size inside the zeolite, which will adsorb a large number of water molecules. On the other hand, the presence of ZnO can reduce the molding temperature of foamed asphalt and improve its mechanical properties and flexibility.

[0007] The modified asphalt waterproofing membrane foaming technology disclosed above is simple, and the pore size is too large, which can easily lead to low strength of the waterproofing membrane and the risk of leakage; modified asphalt is an organic binding material with good adhesion, so it is difficult to form a dense microporous structure inside, and even if a microporous structure is formed, it is easy to stick together and disappear; traditional modified asphalt waterproofing membranes have high thermal conductivity and poor thermal insulation performance, making it difficult to serve as thermal insulation in building structures. At the same time, traditional modified asphalt membranes have high density, which adds a lot of burden to transportation and construction. Summary of the invention

[0008] The purpose of the present invention is to provide a new waterproof coiled material and a preparation method thereof. By introducing a porous structure proppant and a thermal insulation material, in addition to reducing the thermal conductivity coefficient, the porous structure skeleton in the modified asphalt can also be assumed, and the adhesion and disappearance of the porous structure in the foamed modified asphalt can be prevented; the asphalt is first modified by rubber powder, and then the rubber modified asphalt is foamed by rubber foaming technology to form a dense microporous structure. The modified asphalt production process of ordinary modified asphalt waterproof coiled material is improved and optimized to be more suitable for the production of porous modified asphalt, which solves the problem that simple modified asphalt is difficult to foam, and at the same time can solve the pollution problem of waste rubber powder.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] On the one hand, the present invention provides a novel waterproofing membrane, the waterproofing membrane comprising a porous modified asphalt layer; wherein, in the order from top to bottom of the product structure, the porous modified asphalt layer is located at the second layer and the fourth layer of the waterproofing membrane;

[0011] The components and weight fractions of the porous modified asphalt layer include: 20-35 parts of base asphalt A, 20-35 parts of base asphalt B, 8-12 parts of SBS, 1-2 parts of plasticizer, 7-13 parts of viscosity reducer, 10-14 parts of rubber, 2-4 parts of foaming agent, 1-2 parts of foaming aid, 13-18 parts of thermal insulation material and 13-18 parts of proppant.

[0012] Furthermore, in order from top to bottom of the product structure, the waterproof membrane further includes: a first isolation layer, a base layer and a second isolation layer.

[0013] Furthermore, the matrix asphalt A is 70# and / or 90# asphalt; and the matrix asphalt B is 200# asphalt.

[0014] Furthermore, the SBS is a mixed or star-shaped SBS with a molecular weight of 180,000 to 230,000.

[0015] Furthermore, the plasticizer is 150# paraffin oil.

[0016] Furthermore, the viscosity reducer is three-line oil.

[0017] Furthermore, the rubber is 60-80 mesh rubber powder.

[0018] Furthermore, the foaming agent is 4,4'-oxybisbenzenesulfonyl hydrazide.

[0019] Furthermore, the foaming aid is analytically pure stearic acid.

[0020] Furthermore, the thermal insulation material is perlite powder, the component of the perlite powder is obsidian, the expansion multiple is greater than 20, the mesh size is 200-300, and the thermal conductivity is 0.025-0.045 W / m·K.

[0021] Furthermore, the proppant is zeolite powder, the thermal conductivity of which is 0.1-0.15 W / m·K, the natural zeolite content is greater than 50%, the mesh size is 150-250, and the physically adsorbed water content is 1-1.5%.

[0022] Furthermore, the first isolation layer and the second isolation layer are one or more of PE film, mineral granules or isolation materials with heat insulation function;

[0023] The base layer is a polyester felt base with a gram weight of 200-250g / cm 2 .

[0024] On the other hand, the present invention also provides a method for preparing a novel waterproof coiled material, which can be used to prepare the novel waterproof coiled material, and the method comprises the following steps:

[0025] The tire base is spread out for drying and then pre-soaked in oil;

[0026] Applying a porous modified asphalt layer on both sides of the pre-oiled tire base layer and then extruding to determine the thickness;

[0027] A first isolation layer and a second isolation layer are sequentially laid on the surface of the porous modified asphalt layer to obtain a waterproof roll material.

[0028] Furthermore, the method for preparing the porous modified asphalt layer comprises the following steps:

[0029] The base asphalt A and the viscosity reducer are mixed uniformly at 130-150° C., and then the rubber and the plasticizer are added, and the mixture is stirred and swelled at 175-185° C. to obtain a first mixture;

[0030] The temperature of the first mixture is controlled at 100-105° C., and then a heat-insulating material, a foaming aid and a foaming agent are added and stirred evenly, and then the temperature is raised to 150-160° C. within 20 minutes and foamed for 1-2 hours to obtain a foaming mixture;

[0031] The base asphalt B and SBS are stirred and swelled at 175-185° C. to obtain a second mixture;

[0032] Mixing the foaming mixture, the thermal insulation material and the second mixture at 175-185° C. to obtain a third mixture;

[0033] The proppant is slowly added into the third mixture at a rate of 30-70 kg / min and stirred for 20-50 minutes to obtain a porous modified asphalt layer.

[0034] Technical effects and advantages of the present invention:

[0035] First, compared with the common production process, the first step of the production process proposed by the present invention is to produce rubber-modified asphalt to solve the problem that pure asphalt is difficult to foam, and at the same time provide a good low-temperature mixing and foaming environment for the 4,4'-oxybisbenzenesulfonylhydrazine foaming agent;

[0036] Second, the current foamed modified asphalt is easy to stick together and disappear after a long period of high-temperature shearing and stirring. Therefore, adding a pore structure proppant in the last production process can greatly extend the life of the micropores. Even after a long period of waiting for the material, the micropores are not easy to disappear. Moreover, after the product is finalized, even if it is subjected to external force, the pores are not easy to disappear.

[0037] Third, the introduction of foaming agent, proppant and thermal insulation material can significantly reduce the thermal conductivity of modified asphalt. Under the combined effect of these three, the thermal conductivity is less than 0.12W / m·K, achieving the effect of thermal insulation material.

[0038] Fourth, the introduction of foaming agents, as well as proppants and thermal insulation materials that replace ordinary fillers can significantly reduce the density of modified asphalt, reduce production energy consumption, improve production efficiency, and reduce the weight of finished coils.

[0039] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of a process for preparing a novel waterproof coiled material of the present invention;

[0041] Figure 2 The present invention is a schematic diagram of the process for preparing the porous modified asphalt layer. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In order to solve the deficiencies of the prior art, on the one hand, the present invention discloses a new waterproof roll material, which includes a porous modified asphalt layer; wherein, in the order from top to bottom of the product structure, the porous modified asphalt layer is located at the second layer and the fourth layer of the waterproof roll material;

[0044] The components and weight fractions of the porous modified asphalt layer include: 20-35 parts of base asphalt A, 20-35 parts of base asphalt B, 8-12 parts of SBS, 1-2 parts of plasticizer, 7-13 parts of viscosity reducer, 10-14 parts of rubber, 2-4 parts of foaming agent, 1-2 parts of foaming aid, 13-18 parts of thermal insulation material, and 13-18 parts of proppant.

[0045] Preferably, in order from top to bottom of the product structure, the waterproof coiled material further includes: a first isolation layer, a base layer and a second isolation layer.

[0046] Preferably, the matrix asphalt A is 70# and / or 90# asphalt; and the matrix asphalt B is 200# asphalt.

[0047] Preferably, the SBS is a mixed or star-shaped SBS with a molecular weight of 180,000-230,000, which can effectively improve the high and low temperature performance, mechanical properties and aging properties of asphalt.

[0048] Preferably, the plasticizer is 150# paraffin oil, which can effectively improve the processing performance of rubber and increase the firing rate.

[0049] Preferably, the viscosity reducer is three-line oil, which can effectively reduce the viscosity of asphalt and improve the elasticity, plasticity and processing performance of asphalt.

[0050] Preferably, the rubber is 60-80 mesh rubber powder, which has a large specific surface area, good compatibility with asphalt, good high and low temperature performance and durability, and can effectively solve the black pollution problem of waste tires.

[0051] Preferably, the foaming agent is 4,4'-oxybisbenzenesulfonyl hydrazide, which can be well dispersed in rubber, has a low thermal decomposition temperature, and can be well decomposed at 150°C. The gas emission is small, about 120-140mL / g, and it will decompose and release nitrogen within a certain temperature range. It has low permeability and can form a fine, closed, and uniform pore structure in the modified asphalt under normal pressure. The pores are not easy to shrink and have strong resistance to deformation. The size of the foaming pores is between 50-150μm. It has low toxicity and does not pollute the product.

[0052] Preferably, the foaming aid is analytically pure stearic acid, which can effectively improve the foaming efficiency and make the pore structure denser.

[0053] Preferably, the thermal insulation material is perlite powder, the component of the perlite powder is obsidian, the expansion multiple is greater than 20, the mesh size is 200-300, and the thermal conductivity is 0.025-0.045W / m·K. The expanded perlite has good chemical stability and adsorption capacity for liquid phase, has a partial open-pore structure on the surface, and has a good closed-pore structure inside, and is a thermal insulation material with superior performance.

[0054] Preferably, the proppant is zeolite powder, whose thermal conductivity is 0.1-0.15W / m·K, natural zeolite content>50%, mesh size is 150-250, and physically adsorbed water content is 1-1.5%. There are a large number of pore structures inside the zeolite powder, which has better thermal insulation performance than ordinary stone. At the same time, the air and water vapor in the crystal structure of the zeolite powder expand when heated to form bubble nuclei on the interface with the modified asphalt, which can be used as gas supplement in the foamed modified asphalt, effectively preventing the micropores in the foamed asphalt from sticking and disappearing, and can be used as a pore structure skeleton.

[0055] Preferably, pearlite powder and zeolite powder have low density and high porosity, and are easy to store air and a certain amount of free water in the pores. After the two are mixed with asphalt and heated, the air and free water in the open-pore structure expand, forming bubble nuclei at the interface with the modified asphalt, which can improve the foaming efficiency. However, if the moisture content is too high, the energy consumption during production will be large, and there will be certain safety hazards, so the moisture content needs to be controlled at 1-1.5% before use.

[0056] Preferably, the first isolation layer and the second isolation layer can be one or more of PE films, mineral granules or isolation materials with heat insulation function (such as fluorocarbon films, high reflective films or other alternative isolation materials) used in normal waterproof membranes;

[0057] The base layer is a polyester felt base with a gram weight of 200-250g / cm 2 .

[0058] On the other hand, the present invention also discloses a method for preparing a novel waterproof coiled material, and the method can be used to prepare the novel waterproof coiled material. Figure 1 The schematic diagram of the preparation method of a novel waterproof coiled material of the present invention is as follows: Figure 1 As shown, the method comprises the following steps:

[0059] The tire base is spread out for drying and then pre-soaked in oil;

[0060] Applying a porous modified asphalt layer on both sides of the pre-oiled tire base layer and then extruding to determine the thickness;

[0061] A first isolation layer and a second isolation layer are sequentially laid on the surface of the porous modified asphalt layer to obtain a novel waterproof roll material.

[0062] Preferably, Figure 2 The schematic diagram of the preparation method of the porous modified asphalt layer of the present invention is as follows: Figure 2 As shown, the method for preparing the porous modified asphalt layer comprises the following steps:

[0063] The base asphalt A and the viscosity reducer are mixed uniformly at 130-150° C., preferably 140° C.; then rubber and plasticizer are added, and the mixture is stirred and swelled at 175-185° C. to obtain a first mixture;

[0064] The temperature of the first mixture is controlled at 100-105° C., and then a heat-insulating material, a foaming aid and a foaming agent are added and stirred evenly, and then the temperature is raised to 150-160° C. within 20 minutes and foamed for 1-2 hours to obtain a foaming mixture;

[0065] The base asphalt B and SBS are stirred and swelled at 175-185° C. to obtain a second mixture;

[0066] Mixing the foaming mixture, the thermal insulation material and the second mixture at 175-185° C. to obtain a third mixture;

[0067] The proppant is slowly added into the third mixture at a rate of 30-70 kg / min and stirred for 20-50 min to obtain a porous modified asphalt layer. Preferably, the proppant is slowly added at a rate of 50 kg / min and stirred for 30 min.

[0068] It should be noted that the specific preparation methods in the following examples and comparative examples will not be described in detail.

[0069] Example 1

[0070] In this embodiment, the porous modified asphalt layer is composed of the following raw materials in weight fractions: 20 parts of base asphalt A, 35 parts of base asphalt B, 10 parts of SBS, 1 part of plasticizer, 13 parts of viscosity reducer, 10 parts of rubber, 3 parts of foaming agent, 2 parts of foaming aid, 18 parts of thermal insulation material, and 13 parts of proppant.

[0071] The matrix asphalt A used is 90# asphalt, the SBS is SBS4402, the rubber powder is 60 mesh rubber powder, the perlite powder is 200 mesh, the zeolite powder is 300 mesh, and the upper and lower isolation layer materials are PE films.

[0072] Example 2

[0073] In this embodiment, the porous modified asphalt layer is composed of the following raw materials in weight fractions: 35 parts of base asphalt A, 20 parts of base asphalt B, 12 parts of SBS, 2 parts of plasticizer, 7 parts of viscosity reducer, 12 parts of rubber, 2 parts of foaming agent, 2 parts of foaming aid, 13 parts of thermal insulation material, and 18 parts of proppant.

[0074] The matrix asphalt A used is 70# asphalt, SBS is SBS411, rubber powder is 80 mesh rubber powder, perlite powder is 200 mesh, zeolite powder is 200 mesh, the first isolation layer (i.e. the upper surface isolation layer) material is mineral granular material, and the second isolation layer (i.e. the lower surface isolation layer) material is PE film.

[0075] Example 3

[0076] In this embodiment, the porous modified asphalt layer is composed of the following raw materials in weight fractions: 30 parts of base asphalt A, 24 parts of base asphalt B, 8 parts of SBS, 2 parts of plasticizer, 7 parts of viscosity reducer, 14 parts of rubber, 4 parts of foaming agent, 2 parts of foaming aid, 14 parts of thermal insulation material, and 14 parts of proppant.

[0077] The matrix asphalt A used is 90# asphalt, SBS is SBS3411, rubber powder is 80 mesh rubber powder, perlite powder is 300 mesh, zeolite powder is 200 mesh, the first isolation layer (i.e. the upper surface isolation layer) material is fluorocarbon film, and the second isolation layer (i.e. the lower surface isolation layer) material is PE film.

[0078] Comparative Example 1

[0079] In this comparative example, the porous modified asphalt is composed of the following raw materials in weight fractions: 21 parts of base asphalt A, 30 parts of base asphalt B, 9 parts of SBS, 2 parts of plasticizer, 11 parts of viscosity reducer, 11 parts of rubber, 17 parts of thermal insulation material, and 15 parts of proppant. There is no foaming agent or foaming aid in this comparative example.

[0080] The matrix asphalt A used is 90# asphalt, SBS is SBS4402, rubber powder is 60 mesh rubber powder, perlite powder is 200 mesh, zeolite powder is 300 mesh, the first isolation layer (i.e., upper surface isolation layer) material and the second isolation layer (i.e., lower surface isolation layer) material are both PE film.

[0081] Comparative Example 2

[0082] In this comparative example, the porous modified asphalt layer is composed of the following raw materials in weight fractions: 28 parts of base asphalt A, 29 parts of base asphalt B, 8 parts of SBS, 2 parts of plasticizer, 8 parts of viscosity reducer, 12 parts of rubber, 3 parts of foaming agent, 2 parts of foaming aid, 14 parts of filler, and 15 parts of proppant. In this comparative example, the filler replaces the thermal insulation material.

[0083] The matrix asphalt A used is 70# asphalt, SBS is SBS411, rubber powder is 80 mesh rubber powder, filler is 200 mesh talcum powder, zeolite powder is 200 mesh, the first isolation layer (i.e. the upper surface isolation layer) material is mineral granular material, and the second isolation layer (i.e. the lower surface isolation layer) material is PE film.

[0084] Comparative Example 3

[0085] In this comparative example, the porous modified asphalt layer is composed of the following raw materials in weight fractions: 20 parts of base asphalt A, 34 parts of base asphalt B, 8 parts of SBS, 1 part of plasticizer, 12 parts of viscosity reducer, 14 parts of rubber, 2 parts of foaming agent, 1 part of foaming aid, 13 parts of thermal insulation material, and 15 parts of filler. In this comparative example, the filler replaces the proppant.

[0086] The matrix asphalt A used is 90# asphalt, SBS is SBS3411, rubber powder is 80 mesh rubber powder, perlite powder is 300 mesh, filler is 200 mesh talcum powder, the first isolation layer (i.e., the upper surface isolation layer) material is fluorocarbon film, and the second isolation layer (i.e., the lower surface isolation layer) material is PE film.

[0087] In addition, in order to verify the effect of the waterproof membrane of the present invention, the common SBSIIPYPEPE4 membrane on the market was taken as a blank group, and the porous modified asphalt layer and the waterproof membrane prepared in the embodiment and the comparative example were subjected to the following performance test analysis.

[0088] First, verify the effectiveness of the porous modified asphalt layer and waterproof membrane through basic performance tests;

[0089] Table 1 shows the basic properties of the porous modified asphalt layers prepared in the examples and comparative examples. As shown in Table 1, the density of the porous modified asphalt layers prepared in Examples 1-3 is lower than that in the comparative example, indicating that the product quality is low and the internal pore structure is more. The thermal conductivity of the porous modified asphalt layers prepared in Examples 1-3 is lower than that in the comparative example, indicating that the thermal insulation effect of the modified asphalt is good. At the same time, the basic properties of the waterproof membrane, such as impermeability (0.3MPa, 30min), heat resistance (105℃), low temperature flexibility (-25℃) and thermal aging low temperature flexibility (-25℃), are all qualified and meet the requirements of national standards.

[0090] Table 1 Basic properties of porous modified asphalt layers prepared in Examples and Comparative Examples

[0091]

[0092] Second, the pressure bearing capacity of the internal pore structure of porous modified asphalt is verified through compression tests;

[0093] The porous modified asphalt layer prepared in Examples 1-3 of the present invention and Comparative Examples 1-3, and the modified asphalt layer of a common coiled material were uniformly coated on release paper to prepare a sheet of 100×100×2 mm. The sheet was placed under standard curing conditions, and a certain weight was placed on top to form pressures of 10 KPa, 20 KPa, 30 KPa, 40 KPa and 50 KPa on the surface of the coiled material in sequence. After being placed for 24 h±2 h, the weight was removed, and after continuing to cure for 2 h±15 min, the change in the density of the porous modified asphalt under different pressure gradients was measured. The experimental results are shown in Table 2. As can be seen from Table 2, the density of Examples 1-3 increases sharply at 40 KPa, and then increases slowly as the pressure increases; the density of Comparative Example 1 (without foaming agent and foaming aid) increases slowly all the time; the density of Comparative Example 2 (without thermal insulation material) and Comparative Example 3 (without proppant) increases sharply at 30 KPa, and then increases slowly as the pressure increases; the density of the blank group (without foaming agent and foaming aid) also increases slowly all the time.

[0094] Table 2 Density changes of porous modified asphalt under different pressure gradients

[0095]

[0096]

[0097] Third, the thermal insulation effect of the waterproof membrane was further verified through small-scale application test simulation;

[0098] The thickness of the waterproof coiled materials prepared in Examples 1-3 of the present invention and Comparative Examples 1-3 is controlled to be 4mm, and the materials of the first isolation layer (i.e., the upper isolation layer) and the second isolation layer (i.e., the lower isolation layer) are both ordinary PE films. Comparative Example 4 is a relatively common SBSIIPYPEPE4 coiled material on the market. The coiled material is pasted on the surface of a box made of an iron plate (1mm), and the box size is 400×400×400mm. The model is placed in a high and low temperature environment respectively, and the change in the temperature inside the box is tested after 2h. Table 3 shows the thermal insulation effect of the waterproof coiled material under different temperature conditions. The test results are shown in Table 3. It can be seen from Table 3 that the internal temperature of the ordinary coiled material under direct sunlight in summer can reach 50°C. In addition, under the conditions of a high and low temperature curing room, the internal temperature is close to the ambient temperature, and it does not have a good thermal insulation effect. Both the embodiment and the comparative example have a certain thermal insulation effect, but the thermal insulation effect of Examples 1-3 is superior to that of Comparative Examples 1-3 regardless of the test environment, indicating that the purpose of the present invention can only be achieved under the joint action of the foaming agent, the thermal insulation material and the proppant.

[0099] Table 3 Thermal insulation effect of waterproof membrane under different temperature conditions

[0100]

[0101] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waterproof roll material, characterized in that: The waterproof roll material includes a porous modified asphalt layer; wherein, in order from top to bottom of the product structure, the porous modified asphalt layer is located at the second layer and the fourth layer of the waterproof roll material; The components and weight fractions of the porous modified asphalt layer include: 20-35 parts of base asphalt A, 20-35 parts of base asphalt B, 8-12 parts of SBS, 1-2 parts of plasticizer, 7-13 parts of viscosity reducer, 10-14 parts of rubber, 2-4 parts of foaming agent, 1-2 parts of foaming aid, 13-18 parts of thermal insulation material and 13-18 parts of proppant; The matrix asphalt A is 70# and / or 90# asphalt; the matrix asphalt B is 200# asphalt; The SBS is a mixed or star-shaped SBS with a molecular weight of 180,000 to 230,000; The plasticizer is 150# paraffin oil; The viscosity reducer is three-line oil; The rubber is 60-80 mesh rubber powder; The foaming agent is 4,4'-oxybisbenzenesulfonyl hydrazide; The foaming aid is analytically pure stearic acid; The thermal insulation material is pearlite powder, the pearlite powder is composed of obsidian, has an expansion multiple greater than 20, a mesh size of 200-300, and a thermal conductivity of 0.025-0.045 W / m·K; The proppant is zeolite powder, the thermal conductivity of which is 0.1-0.15 W / m·K, the natural zeolite content is greater than 50%, the mesh size is 150-250, and the physically adsorbed water content is 1-1.5%; The method for preparing the porous modified asphalt layer comprises the following steps: The base asphalt A and the viscosity reducer are mixed uniformly at 130-150° C., and then the rubber and the plasticizer are added, and the mixture is stirred and swelled at 175-185° C. to obtain a first mixture; The temperature of the first mixture is controlled at 100-105° C., and then a heat-insulating material, a foaming aid and a foaming agent are added and stirred evenly, and then the temperature is raised to 150-160° C. within 20 minutes and foamed for 1-2 hours to obtain a foaming mixture; The base asphalt B and SBS are stirred and swelled at 175-185° C. to obtain a second mixture; Mixing the foaming mixture, the thermal insulation material and the second mixture at 175-185° C. to obtain a third mixture; The proppant is slowly added into the third mixture at a rate of 30-70 kg / min and stirred for 20-50 minutes to obtain a porous modified asphalt layer.

2. A waterproof coiled material according to claim 1, characterized in that: According to the product structure from top to bottom, the waterproof coiled material further comprises: a first isolation layer, a base layer and a second isolation layer.

3. A waterproof coiled material according to claim 2, characterized in that: The first isolation layer and the second isolation layer are one or more of PE film, mineral granules or isolation materials with heat insulation function; The base layer is a polyester felt base with a gram weight of 200-250g / cm 2 .

4. A method for preparing a waterproof coiled material, wherein the method is used to prepare the waterproof coiled material according to any one of claims 1 to 3, characterized in that: The method comprises the following steps: The tire base is spread out for drying and then pre-soaked in oil; Applying a porous modified asphalt layer on both sides of the pre-oiled tire base layer and then extruding to determine the thickness; A first isolation layer and a second isolation layer are sequentially laid on the surface of the porous modified asphalt layer to obtain a waterproof roll material.

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