Modified asphalt coating material and preparation method thereof as well as asphalt waterproof coiled material and preparation method thereof

Abstract

The invention relates to the technical field of waterproof materials, and provides a modified asphalt coating material and a preparation method thereof, and an asphalt waterproof coiled material and a preparation method thereof. The modified asphalt coating material comprises: petroleum asphalt; the mass of the SBS accounts for 7.69 to 30 percent of the mass of the petroleum asphalt; a low-melting-point fluxing agent, wherein the low-melting-point fluxing agent accounts for 7.69-24% of the mass of the petroleum asphalt; and the low-smoke environment-friendly additive accounts for 1.54-10% of the mass of the petroleum asphalt. The asphalt waterproof coiled material structure comprises an upper protection layer, an upper modified asphalt layer, a tire base layer, a lower modified asphalt layer, a hot melting indication layer and a lower protection layer from top to bottom, and the upper modified asphalt layer and the lower modified asphalt layer are respectively made of modified asphalt coating materials. At least SBS, a low-melting-point fluxing agent and a low-smoke environment-friendly additive are adopted to modify petroleum asphalt to form a modified asphalt coating material, and the formed asphalt waterproof coiled material has the characteristics of rapid melting, smoke reduction and uniform heating in the construction process.

Description

Technical Field

[0001] The present application relates to the technical field of waterproof materials, and specifically to a modified asphalt coating material and a preparation method thereof, and an asphalt waterproofing membrane and a preparation method thereof. Background Art

[0002] Asphalt waterproofing membrane is a material widely used in building waterproofing projects. It has good waterproofing and sealing properties, excellent durability and aging resistance, universal applicability in different environmental conditions, and convenient construction and compatibility with the base surface.

[0003] Although asphalt waterproofing membranes have the above advantages, existing asphalt waterproofing membranes have the following disadvantages in practical applications:

[0004] First, the construction efficiency of existing asphalt waterproofing membranes is low. Existing asphalt waterproofing membranes require a long time to heat before melting and bonding to the base surface, making the construction process slow.

[0005] Secondly, the environmental safety of existing asphalt waterproofing membranes is insufficient. Existing asphalt waterproofing membranes produce a lot of smoke during construction, which not only pollutes the environment but also poses a threat to the health of construction workers.

[0006] Thirdly, the construction quality of existing asphalt waterproofing membranes is unstable. When heated unevenly, asphalt waterproofing membranes can easily become loosely bonded or partially unbonded, compromising waterproofing performance. Existing asphalt waterproofing membranes cannot effectively monitor heating conditions.

[0007] Therefore, it is urgent to propose a modified asphalt waterproof membrane that can melt quickly, reduce smoke, and heat evenly. Summary of the Invention

[0008] To address the above-mentioned issues, this application provides a modified asphalt coating material and preparation method, as well as an asphalt waterproofing membrane and preparation method. These methods improve the rapid melting performance of the asphalt waterproofing membrane, shorten heating time, and enhance construction efficiency; reduce smoke generation during construction, improving the construction environment; and monitor heating uniformity to ensure complete adhesion between the asphalt waterproofing membrane and the substrate, thereby enhancing construction quality.

[0009] This application adopts the following technical solutions:

[0010] On one hand, the present application provides a modified asphalt coating material, the modified asphalt coating material comprising:

[0011] Petroleum asphalt;

[0012] SBS, the mass of SBS accounts for 7.69-30% of the mass of petroleum asphalt;

[0013] Low melting point flux, the low melting point flux accounts for 7.69 - 24% of the mass of the petroleum asphalt;

[0014] Low smoke environmental protection additive, the low smoke environmental protection additive accounts for 1.54 - 10% of the mass of the petroleum asphalt.

[0015] Optionally, the petroleum asphalt includes: No. 70 petroleum asphalt.

[0016] Optionally, the low melting point flux includes: any one of EVA, paraffin wax, POE, LMWPE.

[0017] Optionally, the low smoke environmental protection additive includes: any one of phenolic resin, aluminum hydroxide, halogen-free flame retardant.

[0018] On the other hand, the present application provides a preparation method of a modified asphalt coating material, the method includes:

[0019] Heat the petroleum asphalt to melting;

[0020] Add SBS, low melting point flux, and low smoke environmental protection additive to the petroleum asphalt;

[0021] Stir to form a modified asphalt coating material.

[0022] On another aspect, the present application provides an asphalt waterproofing coil, the structure of the asphalt waterproofing coil sequentially includes:

[0023] Upper protective layer, upper modified asphalt layer, base layer, lower modified asphalt layer, hot melt indication layer, lower protective layer;

[0024] Wherein, the upper modified asphalt layer and the lower modified asphalt layer are respectively made of the above-mentioned modified asphalt coating material.

[0025] Optionally, the thicknesses of the upper modified asphalt layer and the lower modified asphalt layer are respectively 1.2 - 1.5 mm.

[0026] Optionally, the thickness of the hot melt indication layer is 0.1 - 0.2 mm.

[0027] Optionally, the protective layer includes: polyethylene film.

[0028] Optionally, the base layer includes: a composite material of polyester felt and fiberglass mesh cloth.

[0029] Optionally, the hot melt indication layer includes: thermosensitive pigment; the components of the thermosensitive pigment by mass percentage include: 80% titanium dioxide, 10% cobalt oxide, 5% nickel oxide, 5% aluminum silicate.

[0030] Optionally, the temperature change range of the hot melt indication layer is 90 - 120 °C.

[0031] On the other hand, the present application provides a method for preparing an asphalt waterproof coil, which includes:

[0032] Coating a modified asphalt coating material on the upper surface of the base ply to form an upper modified asphalt layer, and coating the modified asphalt coating material on the lower surface of the base ply to form a lower modified asphalt layer;

[0033] Spraying a hot melt indicating layer on the lower surface of the lower modified asphalt layer;

[0034] Covering a protective layer on the upper surface of the upper modified asphalt layer, covering a lower protective layer on the lower surface of the lower modified asphalt layer, and cooling and shaping to obtain the asphalt waterproof coil.

[0035] The solution proposed in the present application at least uses SBS, a low melting point flux, and a low-smoke environmental protection additive to modify petroleum asphalt to form a modified asphalt coating material. The formed asphalt waterproof coil has the characteristics of rapid melting, reduced smoke, and uniform heating during the construction process.

[0036] By adding a low melting point flux to modify petroleum asphalt, the hot melt efficiency is improved, enabling the asphalt waterproof coil to melt and bond to the base surface in a shorter time.

[0037] By adding a low-smoke environmental protection additive to modify petroleum asphalt, the amount of smoke generated is reduced, improving the construction environment.

[0038] By adding a hot melt indicating layer, the heating condition of the asphalt waterproof coil can be monitored in real time, ensuring uniform heating and complete and firm bonding of the asphalt waterproof coil during the construction process, and improving the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0040] Figure 1 A schematic structural diagram of an asphalt waterproof coil according to an embodiment of the present application is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The exemplary embodiments of the present application will be described in more detail below. However, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application can be more thoroughly understood and the scope of the present application can be fully conveyed to those skilled in the art.

[0042] The disclosure of the present invention provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and settings of specific examples are described in the present invention. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0043] Generally, terms can be understood at least in part according to the usage of the present invention. For example, the term "one or more" used in the present invention can be understood at least in part according to the present invention and can be used to describe any component, structure or feature in the singular form, or can be used to describe a combination of components, structures or features in the plural form. Similarly, terms such as "a", "an" or "the" can also be understood to convey singular usage or convey plural usage at least in part according to the present invention. In addition, the term "based on..." can be understood as not necessarily intended to convey a set of exclusive factors, but instead can, at least in part depending on the context, allow for additional factors that do not necessarily have to be explicitly described.

[0044] The concept of this application lies in: by adding a low-melting-point flux to modify petroleum asphalt, the hot-melt efficiency is improved, so that the asphalt waterproofing membrane can be melted and bonded to the base surface in a shorter time. By adding a low-smoke environmental protection additive to modify petroleum asphalt, the amount of smoke generated is reduced, and the construction environment is improved. By adding a hot-melt indication layer, the heating condition of the asphalt waterproofing membrane can be monitored in real time, ensuring that the asphalt waterproofing membrane is heated evenly and bonded comprehensively and firmly during construction, and improving the construction quality.

[0045] This application proposes a modified asphalt coating material on the one hand. The modified asphalt coating material includes:

[0046] Petroleum asphalt;

[0047] SBS, the mass of SBS accounts for 7.69 - 30% of the mass of petroleum asphalt;

[0048] A low-melting-point flux, and the low-melting-point flux accounts for 7.69 - 24% of the mass of petroleum asphalt;

[0049] A low-smoke environmental protection additive, and the low-smoke environmental protection additive accounts for 1.54 - 10% of the mass of petroleum asphalt.

[0050] By adding a low-melting-point flux to petroleum asphalt, the melting temperature of the asphalt waterproofing coil can be reduced, thereby improving the melting efficiency of the asphalt waterproofing coil, enabling the asphalt waterproofing coil to achieve melting in a shorter time, and thus improving the construction efficiency.

[0051] By adding a low-smoke environmental protection additive to petroleum asphalt, the smoke generated during the heating process of the asphalt waterproofing coil can be reduced, avoiding environmental pollution, preventing harm to the health of construction workers, and improving the construction environment.

[0052] Petroleum asphalt can include, but is not limited to, common types of petroleum asphalt such as No. 70 petroleum asphalt and No. 90 petroleum asphalt. Preferably, the petroleum asphalt includes: No. 70 petroleum asphalt.

[0053] Preferably, the low-melting-point flux includes any one of EVA (ethylene-vinyl acetate copolymer), paraffin wax, POE (polyolefin elastomer), and LMWPE (low molecular weight polyethylene).

[0054] Preferably, the low-smoke environmental protection additive includes any one of phenolic resin, aluminum hydroxide, and halogen-free flame retardant. The halogen-free flame retardant can include, but is not limited to, expanded graphite, phosphorus-nitrogen flame retardant, etc.

[0055] On the other hand, the present application proposes a preparation method for a modified asphalt coating material. The preparation method includes:

[0056] Heat the petroleum asphalt to melting;

[0057] Add SBS, a low-melting-point flux, and a low-smoke environmental protection additive to the petroleum asphalt;

[0058] Stir to form a modified asphalt coating material.

[0059] Preferably, heat No. 70 petroleum asphalt to 180 °C for melting; after adding SBS and fully swelling and dissolving it according to the mass ratio of the modified asphalt coating material, add a low-melting-point flux and a low-smoke environmental protection additive; stir for 30 min to form a modified asphalt coating material.

[0060] On yet another aspect, the present application proposes an asphalt waterproofing coil. The structure of the asphalt waterproofing coil sequentially includes:

[0061] An upper protective layer, an upper modified asphalt layer, a base layer, a lower modified asphalt layer, a hot melt indication layer, and a lower protective layer;

[0062] Among them, the upper modified asphalt layer and the lower modified asphalt layer respectively adopt the modified asphalt coating material.

[0063] Figure 1 The structural schematic diagram of the asphalt waterproofing coil proposed in this embodiment is shown. Refer to Figure 1As shown in the figure, the structure of the asphalt waterproofing coil from top to bottom includes: an upper protective layer 1, an upper modified asphalt layer 2, a base ply 3, a lower modified asphalt layer 4, a hot melt indicating layer 5, and a lower protective layer 6.

[0064] Preferably, the thicknesses of the upper modified asphalt layer and the lower modified asphalt layer are 1.2 - 1.5 mm respectively.

[0065] Preferably, the thickness of the hot melt indicating layer is 0.1 - 0.2 mm.

[0066] The protective layer (including the upper protective layer and the lower protective layer) can include, but is not limited to, any one of mineral particles, aluminum foil, polyethylene film, etc. Preferably, the protective layer includes: polyethylene film.

[0067] The base ply can include, but is not limited to, any one of polyester felt, fiberglass felt, composite materials of polyester felt and fiberglass mesh cloth, etc. Preferably, the base ply includes: composite materials of polyester felt and fiberglass mesh cloth.

[0068] The base ply includes composite materials of polyester felt and fiberglass mesh cloth, which can combine the advantages of both polyester felt and fiberglass mesh cloth, improve the mechanical properties (such as tensile strength) and dimensional stability of the asphalt waterproofing coil, enhance durability, and extend the service life.

[0069] The hot melt indicating layer can include, but is not limited to, any one of thermosensitive pigments, color-changing resins, etc. Preferably, the hot melt indicating layer includes: a thermosensitive pigment including 80% titanium dioxide, 10% cobalt oxide, 5% nickel oxide, and 5% aluminum silicate by mass percentage.

[0070] Preferably, the temperature change range of the hot melt indicating layer is 90 - 120 °C. When the hot melt indicating layer is heated to within the temperature change range, the color changes, which can be used as a visual indication of uniform heating.

[0071] On the other hand, the present application proposes a preparation method for an asphalt waterproofing coil. The preparation method includes:

[0072] Coating the modified asphalt coating material on the upper surface of the base ply to form an upper modified asphalt layer, and coating the modified asphalt coating material on the lower surface of the base ply to form a lower modified asphalt layer;

[0073] Spraying a hot melt indicating layer on the lower surface of the lower modified asphalt layer;

[0074] Covering an upper protective layer on the upper surface of the upper modified asphalt layer, covering a lower protective layer on the lower surface of the lower modified asphalt layer, and cooling and shaping to obtain the asphalt waterproofing coil.

[0075] Preferably, a scraping device is used to coat the modified asphalt coating material on the upper and lower surfaces of the base layer of the composite material of polyester felt and fiberglass mesh cloth respectively, to form an upper modified asphalt layer and a lower modified asphalt layer; a thermosensitive pigment is sprayed on the lower surface of the lower modified asphalt layer to form a hot-melt indication layer; polyethylene films are evenly covered on the upper surface of the upper modified asphalt layer and the lower surface of the hot-melt indication layer respectively, and after cooling, it is cut into rolls.

[0076] Example 1

[0077] An asphalt waterproofing coil A

[0078] The fiberglass mesh cloth and the polyester felt (the mass ratio of the fiberglass mesh cloth to the polyester felt is 6:4) are compounded by a hot pressing process (the compounding pressure is 0.4 MPa) to obtain a base layer.

[0079] 70# petroleum asphalt is added to the reaction kettle and heated to 180 °C for melting; SBS is added according to a mass of 11.11% of the mass of 70# petroleum asphalt, EVA is added according to a mass of 14.14% of the mass of 70# petroleum asphalt, and phenolic resin is added according to a mass of 4.04% of the mass of 70# petroleum asphalt; stirring is carried out to form a modified asphalt coating material.

[0080] A scraping device is used to coat the modified asphalt coating material on the upper and lower surfaces of the base layer respectively, and the thickness of the modified asphalt coating material on each surface is 1.2 mm, to form an upper modified asphalt layer and a lower modified asphalt layer.

[0081] A thermosensitive pigment is sprayed on the lower surface of the lower modified asphalt layer, and the thickness of the thermosensitive pigment is 0.15 mm, to form a hot-melt indication layer.

[0082] Polyethylene films are covered on the upper surface of the upper modified asphalt layer and the lower surface of the hot-melt indication layer respectively, cooled and shaped, and cut into 50 mm × 50 mm for testing.

[0083] Example 2

[0084] An asphalt waterproofing coil B

[0085] The fiberglass mesh cloth and the polyester felt (the mass ratio of the fiberglass mesh cloth to the polyester felt is 1:1) are compounded by a hot pressing process (the compounding pressure is 0.4 MPa) to obtain a base layer.

[0086] 70# petroleum asphalt is added to the reaction kettle and heated to 180 °C for melting; SBS is added according to a mass of 13.64% of the mass of 70# petroleum asphalt, POE is added according to a mass of 9.47% of the mass of 70# petroleum asphalt, and a phosphorus-nitrogen flame retardant is added according to a mass of 5.68% of the mass of 70# petroleum asphalt; stirring is carried out to form a modified asphalt coating material.

[0087] Use a scraping equipment to coat the modified asphalt coating material on the upper and lower surfaces of the base ply respectively, with the thickness of the modified asphalt coating material on each surface being 1.3 mm, to form an upper modified asphalt layer and a lower modified asphalt layer.

[0088] Spray a thermosensitive pigment on the lower surface of the lower modified asphalt layer, with the thickness of the thermosensitive pigment being 0.15 mm, to form a hot melt indication layer.

[0089] Cover polyethylene films on the upper surface of the upper modified asphalt layer and the lower surface of the hot melt indication layer respectively, cool and shape them, and cut them into 50 mm × 50 mm for testing.

[0090] Example 3

[0091] An asphalt waterproof coil C

[0092] Compound a fiberglass mesh cloth and a polyester felt (the mass ratio of the fiberglass mesh cloth to the polyester felt is 5.5:4.5) through a hot pressing process (the compound pressure is 0.4 MPa) to obtain a base ply.

[0093] Add No. 70 petroleum asphalt into a reaction kettle, heat it up to 180 °C to melt; add SBS according to the mass accounting for 8.70% of the mass of No. 70 petroleum asphalt, add LMWPE according to the mass accounting for 21.74% of the mass of No. 70 petroleum asphalt, and add expanded graphite according to the mass accounting for 4.35% of the mass of No. 70 petroleum asphalt; stir to form a modified asphalt coating material.

[0094] Use a scraping equipment to coat the modified asphalt coating material on the upper and lower surfaces of the base ply respectively, with the thickness of the modified asphalt coating material on each surface being 1.5 mm, to form an upper modified asphalt layer and a lower modified asphalt layer.

[0095] Spray a thermosensitive pigment on the lower surface of the lower modified asphalt layer, with the thickness of the thermosensitive pigment being 0.15 mm, to form a hot melt indication layer.

[0096] Cover polyethylene films on the upper surface of the upper modified asphalt layer and the lower surface of the hot melt indication layer respectively, cool and shape them, and cut them into 50 mm × 50 mm for testing.

[0097] Example 4

[0098] An asphalt waterproof coil D

[0099] Compound a fiberglass mesh cloth and a polyester felt (the mass ratio of the fiberglass mesh cloth to the polyester felt is 5:4) through a hot pressing process (the compound pressure is 0.4 MPa) to obtain a base ply.

[0100] Add No. 70 petroleum asphalt into the reactor and heat it to 180 °C for melting; add SBS according to the mass accounting for 12.17% of the mass of No. 70 petroleum asphalt, add paraffin according to the mass accounting for 13.13% of the mass of No. 70 petroleum asphalt, and add aluminum hydroxide according to the mass accounting for 9.49% of the mass of No. 70 petroleum asphalt; stir to form a modified asphalt coating material.

[0101] Use a scraping equipment to coat the modified asphalt coating material on the upper and lower surfaces of the base ply respectively, and the thickness of the modified asphalt coating material on each surface is 1.4 mm to form an upper modified asphalt layer and a lower modified asphalt layer.

[0102] Spray a heat-sensitive pigment on the lower surface of the lower modified asphalt layer, and the thickness of the heat-sensitive pigment is 0.15 mm to form a hot-melt indicating layer.

[0103] Cover polyethylene films on the upper surface of the upper modified asphalt layer and the lower surface of the hot-melt indicating layer respectively, cool and shape them, and cut them into 50 mm × 50 mm for testing.

[0104] Example 5

[0105] An asphalt waterproof coil E

[0106] Compound a fiberglass mesh cloth and a polyester felt (the mass ratio of the fiberglass mesh cloth to the polyester felt is 3:2) through a hot pressing process (the compound pressure is 0.4 MPa) to obtain a base ply.

[0107] Add No. 70 petroleum asphalt into the reactor and heat it to 180 °C for melting; add SBS according to the mass accounting for 7.69% of the mass of No. 70 petroleum asphalt, add paraffin according to the mass accounting for 24% of the mass of No. 70 petroleum asphalt, and add phenolic resin according to the mass accounting for 10% of the mass of No. 70 petroleum asphalt; stir to form a modified asphalt coating material.

[0108] Use a scraping equipment to coat the modified asphalt coating material on the upper and lower surfaces of the base ply respectively, and the thickness of the modified asphalt coating material on each surface is 1.5 mm to form an upper modified asphalt layer and a lower modified asphalt layer.

[0109] Spray a heat-sensitive pigment on the lower surface of the lower modified asphalt layer, and the thickness of the heat-sensitive pigment is 0.2 mm to form a hot-melt indicating layer.

[0110] Cover polyethylene films on the upper surface of the upper modified asphalt layer and the lower surface of the hot-melt indicating layer respectively, cool and shape them, and cut them into 50 mm × 50 mm for testing.

[0111] Example 6

[0112] An asphalt waterproof coil F

[0113] The fiberglass mesh cloth and polyester felt (the mass ratio of fiberglass mesh cloth to polyester felt is 3.5:3) are compounded by a hot pressing process (the compounding pressure is 0.4 MPa) to obtain a base layer.

[0114] Add 70# petroleum asphalt into a reaction kettle, heat it up to 180 °C to melt; add SBS according to 30% of the mass of 70# petroleum asphalt, add EVA according to 7.69% of the mass of 70# petroleum asphalt, and add aluminum hydroxide according to 10% of the mass of 70# petroleum asphalt; stir to form a modified asphalt coating material.

[0115] Use a scraping and coating device to coat the modified asphalt coating material on the upper and lower surfaces of the base layer respectively, and the thickness of the modified asphalt coating material on each surface is 1.3 mm to form an upper modified asphalt layer and a lower modified asphalt layer.

[0116] Spray a thermosensitive pigment on the lower surface of the lower modified asphalt layer, and the thickness of the thermosensitive pigment is 0.2 mm to form a hot melt indication layer.

[0117] Cover polyethylene films on the upper surface of the upper modified asphalt layer and the lower surface of the hot melt indication layer respectively, cool and shape them, and cut them into 50 mm × 50 mm for testing.

[0118] Example 7

[0119] An asphalt waterproof coiled material G

[0120] The fiberglass mesh cloth and polyester felt (the mass ratio of fiberglass mesh cloth to polyester felt is 7:6) are compounded by a hot pressing process (the compounding pressure is 0.4 MPa) to obtain a base layer.

[0121] Add 70# petroleum asphalt into a reaction kettle, heat it up to 180 °C to melt; add SBS according to 30% of the mass of 70# petroleum asphalt, add EVA according to 24% of the mass of 70# petroleum asphalt, and add aluminum hydroxide according to 1.54% of the mass of 70# petroleum asphalt; stir to form a modified asphalt coating material.

[0122] Use a scraping and coating device to coat the modified asphalt coating material on the upper and lower surfaces of the base layer respectively, and the thickness of the modified asphalt coating material on each surface is 1.4 mm to form an upper modified asphalt layer and a lower modified asphalt layer.

[0123] Spray a thermosensitive pigment on the lower surface of the lower modified asphalt layer, and the thickness of the thermosensitive pigment is 0.2 mm to form a hot melt indication layer.

[0124] Cover polyethylene films on the upper surface of the upper modified asphalt layer and the lower surface of the hot melt indication layer respectively, cool and shape them, and cut them into 50 mm × 50 mm for testing.

[0125] Comparative Example 1

[0126] An asphalt waterproofing coil H

[0127] EVA is not added to the modified asphalt coating material, and the others are the same as in Example 1.

[0128] Comparative Example 2

[0129] An asphalt waterproofing coil I

[0130] Phenolic resin is not added to the modified asphalt coating material, and the others are the same as in Example 1.

[0131] Comparative Example 3

[0132] An asphalt waterproofing coil J

[0133] The lower surface of the lower modified asphalt layer is not sprayed with a thermosensitive pigment, but a polyethylene film is directly covered on the lower surface of the lower modified asphalt layer, and the others are the same as in Example 1.

[0134] Performance testing

[0135] Test the heat resistance and low temperature flexibility of asphalt waterproofing coils A-J in accordance with the provisions of GB / T 18242-2008 "Elastomer modified asphalt waterproofing coils".

[0136] Hot melt efficiency testing

[0137] Equipment:

[0138] HDS-2000 industrial hot air blower (temperature adjustment range 50 - 650 °C, heating power 2000 W).

[0139] Method:

[0140] Fix asphalt waterproofing coils A-J on the test bench respectively, and use the HDS-2000 industrial hot air blower to heat the bottom surface of the coils at a wind temperature of 300 °C.

[0141] Measure the time required for the lower modified asphalt layer to completely melt.

[0142] Compare asphalt waterproofing coils A-J with ordinary coils (Dongfang Yuhong SBS IPYPE PE3), and calculate the proportion of time shortening.

[0143] Smoke emission situation detection

[0144] Equipment:

[0145] ASTM E662 standard smoke density tester (model SDR-1100).

[0146] Method:

[0147] In a closed laboratory (volume 0.5 m 3)In it, asphalt waterproofing membranes A - J were heated to 200 °C respectively and maintained for 5 minutes.

[0148] Measure the smoke density generated per unit time (expressed by light transmittance).

[0149] Compare asphalt waterproofing membranes A - J with ordinary membranes (Dongfang Yuhong SBS IPYPE PE3), and calculate the reduction ratio of smoke density.

[0150] The test results are shown in Table 1.

[0151] Table 1 Test Results of Asphalt Waterproofing Membranes

[0152]

[0153]

[0154] Among them, the hot - melt efficiency of the ordinary membrane (Dongfang Yuhong SBS IPYPE PE3) is: melting time 4.3 min; the smoke density of the ordinary membrane (Dongfang Yuhong SBS IPYPE PE3) is: 360 Ds / m.

[0155] Combined with Table 1, it can be seen that:

[0156] The heat resistance of the asphalt waterproofing membranes (A - G) obtained in Examples 1 - 7 of this application is 105 - 110 °C without flowing or slipping, which is higher than the "105 °C, no flowing or dripping" in the standard requirements.

[0157] The low - temperature flexibility of the asphalt waterproofing membranes (A - G) obtained in Examples 1 - 7 of this application has no cracks at - 28 °C to - 25 °C, which is higher than the "-20 °C, no cracks" in the standard requirements.

[0158] For the asphalt waterproofing membrane (H) obtained in Comparative Example 1 of this application, the melting time is the same as that of the ordinary membrane, and there is no significant improvement in hot - melt efficiency; the smoke density is reduced less than that of the ordinary membrane.

[0159] Compared with the asphalt waterproofing membrane (H) obtained in Comparative Example 1, the melting time of the asphalt waterproofing membranes (A - G) obtained in Examples 1 - 7 of this application is significantly shortened, and the smoke density is significantly reduced.

[0160] For the asphalt waterproofing membrane (I) obtained in Comparative Example 2 of this application, the smoke density is the same as that of the ordinary membrane, and there is no significant reduction in smoke density.

[0161] Compared with the asphalt waterproofing membrane (I) obtained in Comparative Example 2, the smoke density of the asphalt waterproofing membranes (A - G) obtained in Examples 1 - 7 of this application is significantly reduced.

[0162] The asphalt waterproofing membrane (J) obtained in Comparative Example 3 of the present application lacks a hot melt indication layer, making it impossible to accurately determine the end time of melting and unable to ensure a uniform heating area.

[0163] Compared with the asphalt waterproofing membrane (J) obtained in Comparative Example 3, the asphalt waterproofing membranes (A - G) obtained in Examples 1 - 7 of the present application can monitor the melting state in real time by means of the hot melt indication layer indicating the heating condition.

[0164] As described above, the above are only specific embodiments of the present application. Under the above teachings of the present application, those skilled in the art can make other improvements or deformations based on the above embodiments. Those skilled in the art should understand that the above specific description is only a better explanation of the purpose of the present application, and the protection scope of the present application should be subject to the protection scope of the claims.

[0165] In addition, those skilled in the art can understand that although some of the embodiments described herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

Claims

1. A modified asphalt coating material, characterized in that, The modified asphalt coating material includes: Petroleum asphalt; SBS, where the mass of the SBS accounts for 7.69 - 30% of the mass of the petroleum asphalt; Low melting point flux, where the low melting point flux accounts for 7.69 - 24% of the mass of the petroleum asphalt; Low-smoke environmental protection additive, where the low-smoke environmental protection additive accounts for 1.54 - 10% of the mass of the petroleum asphalt.

2. The modified asphalt coating material according to claim 1, wherein The petroleum asphalt includes: No. 70 petroleum asphalt; The low melting point flux includes: any one of EVA, paraffin wax, POE, LMWPE; The low-smoke environmental protection additive includes: any one of phenolic resin, aluminum hydroxide, halogen-free flame retardant.

3. A method for preparing the modified asphalt coating material according to any one of claims 1 or 2, characterized in that, The method includes: Heating the petroleum asphalt to melting; Adding the SBS, the low melting point flux, and the low-smoke environmental protection additive to the petroleum asphalt; Stirring to form the modified asphalt coating material.

4. An asphalt waterproofing coil, characterized in that, The asphalt waterproofing coil structure sequentially includes: Upper protective layer, upper modified asphalt layer, base layer, lower modified asphalt layer, hot melt indicating layer, lower protective layer; Among them, the upper modified asphalt layer and the lower modified asphalt layer respectively adopt the modified asphalt coating material according to any one of claims 1 - 4.

5. The asphalt waterproofing coil according to claim 4, characterized in that, The thicknesses of the upper modified asphalt layer and the lower modified asphalt layer are respectively 1.2 - 1.5 mm; the thickness of the hot melt indicating layer is 0.1 - 0.2 mm.

6. The asphalt waterproofing coil according to claim 4, characterized in that, The upper protective layer and the lower protective layer include: polyethylene film.

7. The asphalt waterproof coiled material according to claim 4, wherein The base layer includes: polyester felt and fiberglass mesh cloth composite material.

8. The asphalt waterproof coiled material according to claim 4, wherein The hot melt indicating layer includes: thermosensitive pigment; the components of the thermosensitive pigment include, by mass percentage: 80% titanium dioxide, 10% cobalt oxide, 5% nickel oxide, 5% aluminum silicate.

9. The asphalt waterproof coiled material according to claim 4, characterized in that The temperature change range of the hot melt indicating layer is 90 - 120 °C.

10. A method for preparing the asphalt waterproof coiled material according to any one of claims 4 to 9, characterized in that, The preparation method includes: Coating the modified asphalt coating material on the upper surface of the base layer to form the upper modified asphalt layer, and coating the modified asphalt coating material on the lower surface of the base layer to form the lower modified asphalt layer; Spraying the hot melt indicating layer on the lower surface of the lower modified asphalt layer; Covering the upper protective layer on the upper surface of the upper modified asphalt layer, covering the lower protective layer on the lower surface of the lower modified asphalt layer, and cooling and shaping to obtain the asphalt waterproofing coil.

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