High-performance polymer modified asphalt, preparation method thereof and waterproof coiled material

Abstract

The invention discloses high-performance polymer modified asphalt, a preparation method thereof and a waterproof coiled material, and the high-performance polymer modified asphalt comprises the following components in parts by weight: 60-65 parts of petroleum asphalt, 12-14 parts of SBS, 2-4 parts of SEBS, 2-4 parts of EVA, 1-3 parts of oil, 2-4 parts of a cross-linking agent, 1-2 parts of an antibacterial agent and 10-20 parts of an inorganic filler. The high-performance polymer modified asphalt is excellent in waterproof performance, and the preparation method is simple; the prepared waterproof coiled material has good low-temperature flexibility at-50 DEG C and excellent antibacterial property.

Description

Technical Field

[0001] The invention relates to asphalt and a preparation method thereof and a waterproof coiled material, and in particular to high-performance polymer modified asphalt and a preparation method thereof and a waterproof coiled material. Background Art

[0002] Modified asphalt waterproofing membrane plays an important role in both civil and major waterproof buildings. At present, the most widely used modified asphalt on the market is SBS (styrene-butadiene-styrene block copolymer) modified asphalt, but when the mass fraction of SBS in a single SBS modified asphalt is large, SBS may cause agglomeration problems in the asphalt. This is mainly due to the lack of compatibility between SBS and asphalt. If the SBS content is increased to improve the performance of the modified asphalt, the high and low temperature performance of the modified asphalt is limited, especially the improvement of the low temperature temperature index is limited.

[0003] With the release of the mandatory national standard "General Specification for Waterproofing of Buildings and Municipal Engineering", it is clearly required to increase the design service life of engineering waterproofing, and the design service life of the waterproof layer is significantly improved compared with the current engineering construction standards. This requires engineering waterproofing materials, especially waterproofing materials such as polymer-modified asphalt waterproofing membranes that account for a large proportion of engineering usage, to significantly improve material performance to meet current and future engineering construction needs.

[0004] In order to increase the amount of SBS in asphalt and ensure its modification effect, stabilizers or similar modifiers are often added to improve the modification effect and technical indicators of modified asphalt. For example, by replacing part of SBS with SEBS (linear tri-block copolymer) and EVA (ethylene-vinyl acetate copolymer), etc., the performance of asphalt is improved and optimized by co-adding, thereby improving the use range and life of asphalt.

[0005] Patent document CN107383904B discloses a polymer modified asphalt and a preparation method thereof, which uses SEBS and SIS to replace part of SBS, greatly improving the high and low temperature performance of the modified asphalt, so that it meets the heat resistance requirements at 120°C and does not break at a low temperature of -50°C. However, the problem with this method is that due to the characteristics of the performance of modifier materials such as SEBS, SIS, and SBS, even if cross-linking agents and other substances are added during the production and preparation of the modified asphalt, they will inevitably agglomerate when they are miscible with the base asphalt, which is not conducive to the performance stability of the modified asphalt, and thus affects the performance and life of the corresponding waterproof membrane.

[0006] Patent document CN116285398A discloses a highly durable modified asphalt and its preparation method, which uses mineral asphalt and star-shaped SBS with a molecular weight of 200,000-250,000 to improve the segregation problem of polymer modifiers such as SBS through the physical and chemical properties of mineral asphalt itself. However, mineral asphalt has the problems of complex raw material sources and large differences in physical and chemical properties of different mineral asphalts, which is not conducive to large-scale production control.

[0007] In order to improve the stability and durability of modified asphalt waterproof membranes, it is urgent to develop a high-performance polymer modified asphalt and its preparation method, as well as waterproof membranes to meet the strict requirements of waterproofing under the new situation. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a high-performance polymer modified asphalt and its preparation method and waterproof roll. The high-performance polymer modified asphalt has excellent waterproof performance and a simple preparation method. The prepared waterproof roll has good low-temperature flexibility at -50°C and excellent antibacterial properties.

[0009] The technical solution adopted by the present invention to solve the above technical problems is to provide a high-performance polymer modified asphalt, which comprises the following components, by weight: 60 to 65 parts of petroleum asphalt, 12 to 14 parts of SBS, 2 to 4 parts of SEBS, 2 to 4 parts of EVA, 1-3 parts of oil, 2 to 4 parts of cross-linking agent, 1 to 2 parts of antibacterial agent, and 10 to 20 parts of inorganic filler.

[0010] Furthermore, the petroleum asphalt is one or more of 70# and 90# heavy-duty road petroleum asphalt; the SBS is selected from one or more of grades YH1791, YH792, YH801, YH802, and 4402; the SEBS is selected from one or more of grades YH-501, YH-502, YH-503, YH-561, and YH-602.

[0011] Furthermore, the oil is a mixture of solvent oil and vegetable oil, and the mass content of vegetable oil is not less than 50%; the solvent oil is one or more of reduced third-line oil, cycloparaffin oil and aromatic oil.

[0012] Furthermore, the cross-linking agent is dicyclohexylmethane diisocyanate.

[0013] Furthermore, the antibacterial agent is oil-soluble graphene quantum dots, the lateral size of which is less than 50 nm and the thickness is 0.5-1.0 nm.

[0014] Furthermore, the inorganic filler is selected from talcum powder and steel slag powder, and the mass proportion of the steel slag is 40% to 60%.

[0015] In order to solve the above technical problems, the present invention also provides a method for preparing the above high-performance polymer modified asphalt, comprising the following steps: S1) adding the oil, SBS, SEBS and EVA to the molten petroleum asphalt at a temperature of 170-185°C for swelling to obtain a first mixture; S2) dissolving the cross-linking agent and the antibacterial agent in the first mixture at a temperature of 170-190°C, then adding the inorganic filler, stirring evenly, to obtain the high-performance polymer modified asphalt.

[0016] In order to solve the above technical problems, the present invention also provides a high-performance polymer modified asphalt waterproofing membrane, which comprises, from top to bottom, an upper covering isolation layer, an upper surface asphalt coating layer, a reinforcement layer, a lower surface asphalt coating layer and a lower covering isolation layer, wherein the upper surface asphalt coating layer and the lower surface asphalt coating layer are both made of the above-mentioned high-performance polymer modified asphalt.

[0017] Furthermore, the materials of the upper and lower covering isolation layers are selected from polyethylene film, fine sand or shale sheets; and the reinforcement layer is a polyester base.

[0018] Furthermore, the thickness of the high-performance polymer modified asphalt waterproofing membrane is 3.0 to 4.5 mm.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1) The high-performance polymer modified asphalt has excellent high and low temperature performance, which is better than traditional asphalt. Due to the addition of modifiers such as SEBS and EVA, and the addition of part of vegetable oil to improve the agglomeration problem of the above modifiers in the asphalt, the modification effect is better and the stability is better; 2) The addition of oil-soluble graphene quantum dots can improve the antibacterial and durability of the modified asphalt, and the life of the coil is longer; 3) Steel slag mineral powder is added as a filler, and the active substances in the steel slag are used to improve the physical and chemical properties of the coil covering material, thereby improving the performance of the coil, reducing the cost of the coil, and increasing the recycling rate of steel slag waste, which is environmentally friendly. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the embodiments.

[0021] According to the first aspect of the present invention, the present invention provides a high-performance polymer modified asphalt, which is made of raw materials comprising the following components, in parts by weight: 60 to 65 parts of petroleum asphalt, 12 to 14 parts of SBS, 2 to 4 parts of SEBS, 2 to 4 parts of EVA, 1-3 parts of oils, 2 to 4 parts of cross-linking agents, 1 to 2 parts of antibacterial agents, and 10 to 20 parts of inorganic fillers.

[0022] In the present invention, the petroleum asphalt is one or more of 70# and 90# heavy-duty road petroleum asphalt.

[0023] In the present invention, the SBS, SEBS and EVA are compound modifiers of the high-performance polymer-modified asphalt.

[0024] The SBS is a star-shaped SBS, in which the weight content of styrene is 25-35%. The SBS elastomer is selected from one or more of the brands YH1791, YH792, YH801, YH802, and 4402, preferably one or two of the brands YH802 and 4402.

[0025] The SEBS (styrene-ethylene-butylene-styrene copolymer) is a linear triblock copolymer with polystyrene as the terminal segment and ethylene-butylene copolymer obtained by hydrogenating polybutadiene as the middle elastic block. SEBS does not contain unsaturated double bonds and therefore has good stability and aging resistance. The SEBS elastomer is selected from one or more of the grades YH-501, YH-502, YH-503, YH-561, and YH-602, preferably the grade YH-501.

[0026] In the present invention, the oils are solvent oil and vegetable oil, wherein the solvent oil is one or more of tri-line oil, cycloparaffin oil and aromatic oil, and the vegetable oil is oil extracted from plant seeds, fruits, etc. Preferably, the proportion of vegetable oil is not less than 50%; vegetable oil is rich in fatty acids, and has better solubility in modifiers such as SBS and SEBS, which can significantly improve the modification effect of the modifier, improve the performance stability of the modified asphalt, and improve the agglomeration phenomenon of the modifier after modification.

[0027] In the present invention, the crosslinking agent can make the above modifier fully swell, undergo a crosslinking reaction to form a network structure, thereby ensuring the high temperature stability of the high performance polymer modified asphalt. Preferably, the crosslinking agent is dicyclohexylmethane diisocyanate.

[0028] In the present invention, the antibacterial agent is an oil-soluble graphene quantum dot, whose lateral size is less than 50nm and thickness is 0.5-1.0nm. The oil-soluble graphene quantum dot is more compatible with asphalt and can better play the antibacterial advantage of graphene quantum dots. Active oxygen can be generated under room temperature conditions. These active oxygens have strong oxidizing ability and can destroy the cell membranes of bacteria and viruses, thereby having antibacterial properties. The addition of oil-soluble graphene quantum dots in the present invention can significantly improve the antibacterial properties of modified asphalt, inhibit the generation of bacteria during use, and extend the service life of the coil.

[0029] In the present invention, the inorganic filler is talcum powder and steel slag powder, wherein the steel slag accounts for 40% to 60%; the C2S and C3S in the steel slag powder have certain chemical activity. During the use of the coil, they react with asphalt and surrounding water vapor to generate stable crystals, which can improve the mechanical properties and durability of the coil.

[0030] According to a second aspect of the present invention, the present invention provides a method for preparing the high performance polymer modified asphalt, the preparation method comprising: 1) adding the oil, SBS, SEBS and EVA to the molten petroleum asphalt at a temperature of 170-185° C. to swell the mixture to obtain a first mixture; preferably, the swelling time is usually 3 h to 5 h; 2) At a temperature of 170-190° C., dissolving the crosslinking agent and the antibacterial agent in the first mixture, adding the inorganic filler, and stirring evenly to obtain the high-performance polymer modified asphalt.

[0031] The high-performance polymer modified asphalt obtained by the present invention has better performance than traditional asphalt, especially in mechanical properties and waterproof properties under high and low temperature environments; vegetable oil components are added to the formula, and vegetable oil is oil extracted from plant seeds, fruits, etc., has natural fatty acids, and has better solubility in SBS, SEBS, etc., which can further improve the stability, antibacterial properties and other properties of the modified asphalt; oil-soluble graphene quantum dots are added to the formula, which, on the one hand, give the modified asphalt a better antibacterial effect, and can improve the durability of the modified asphalt; steel slag filler is added to the formula, and the iron, calcium, silicon, aluminum and other elements contained in the steel slag can react with substances in the modified asphalt to improve the performance of the modified asphalt.

[0032] According to the third aspect of the present invention, the present invention provides a high-performance polymer modified asphalt waterproofing membrane, which comprises, from top to bottom, an upper surface isolation layer, an upper surface asphalt coating layer, a reinforcement layer, a lower surface asphalt coating layer and a lower surface isolation layer. The isolation materials of the upper surface isolation layer and the lower surface isolation layer are selected from polyethylene film, fine sand or shale sheets, the reinforcement layer is a polyester base, and the thickness of the high-performance polymer modified asphalt waterproofing membrane is 3.0 to 4.5 mm, and the specific size can be determined according to the requirements of different types of waterproofing membranes in the prior art.

[0033] In the present invention, the preparation method of the polymer modified waterproof membrane can be carried out with reference to the prior art, and the present invention has no particular limitation thereto.

[0034] The present invention is described in detail below by way of examples, but the present invention is not limited by the examples.

[0035] Example 1 (1) Preparation of high-performance polymer-modified asphalt At 170-185°C, 1 part by weight of vegetable oil, 12 parts by weight of SBS, 3 parts by weight of SEBS and 4 parts by weight of EVA are respectively added to 60 parts by weight of molten 70# petroleum asphalt, and then the temperature is maintained at 180°C. After the above-mentioned modifiers are completely swollen, 2 parts by weight of dicyclohexylmethane diisocyanate are added and the temperature is maintained at 170-190°C. After the dicyclohexylmethane diisocyanate is completely dissolved, 1 part by weight of oil-soluble graphene quantum dots, 4 parts by weight of 400-mesh talc and 6 parts by weight of 400-mesh steel slag powder are added and stirred evenly to obtain a high-performance polymer modified asphalt coating.

[0036] (2) Preparation of high-performance polymer-modified asphalt waterproof membrane The high-performance polymer modified asphalt coating material is coated on the upper and lower surfaces of the impregnated and squeezed polyester base at a temperature not lower than 180° C., and then covered with a polyethylene film, cooled and shaped, and rolled up to obtain a high-performance polymer modified asphalt waterproofing membrane.

[0037] Example 2 (1) Preparation of high-performance polymer-modified asphalt At 170-185°C, 1 part by weight of vegetable oil, 1 part by weight of cyclohexane oil, 13 parts by weight of SBS, 2 parts by weight of SEBS and 3 parts by weight of EVA are respectively added to 63 parts by weight of molten 70# petroleum asphalt, and then the temperature is maintained at 180°C. After the above-mentioned modifiers are completely swollen, 3 parts by weight of dicyclohexylmethane diisocyanate are added and the temperature is maintained at 170-190°C. After the dicyclohexylmethane diisocyanate is completely dissolved, 1.5 parts by weight of oil-soluble graphene quantum dots, 6 parts by weight of 400-mesh talc and 9 parts by weight of 400-mesh steel slag powder are added and stirred evenly to obtain a high-performance polymer modified asphalt coating.

[0038] (2) The preparation of high performance polymer modified asphalt waterproof membrane is the same as that in Example 1.

[0039] Example 3 (1) Preparation of high-performance polymer-modified asphalt At 170-185°C, 1 part by weight of vegetable oil, 1 part by weight of aromatic oil, 14 parts by weight of SBS, 4 parts by weight of SEBS and 2 parts by weight of EVA are respectively added to 65 parts by weight of molten 70# petroleum asphalt, and then the temperature is maintained at 180°C. After the above-mentioned modifiers are completely swollen, 4 parts by weight of dicyclohexylmethane diisocyanate are added and the temperature is maintained at 170-190°C. After the dicyclohexylmethane diisocyanate is completely dissolved, 2 parts by weight of oil-soluble graphene quantum dots, 8 parts by weight of 400-mesh talc and 12 parts by weight of 400-mesh steel slag powder are added and stirred evenly to obtain a high-performance polymer modified asphalt coating.

[0040] (2) The preparation of high performance polymer modified asphalt waterproof membrane is the same as that in Example 1.

[0041] Example 4 (1) Preparation of high-performance polymer-modified asphalt At 170-185°C, 3 parts by weight of vegetable oil, 13 parts by weight of SBS, 3 parts by weight of SEBS and 2 parts by weight of EVA are respectively added to 65 parts by weight of molten 90# petroleum asphalt, and then the temperature is maintained at 180°C. After the above-mentioned modifiers are completely swollen, 4 parts by weight of dicyclohexylmethane diisocyanate are added and the temperature is maintained at 170-190°C. After the dicyclohexylmethane diisocyanate is completely dissolved, 2 parts by weight of oil-soluble graphene quantum dots, 6 parts by weight of 400 mesh talc and 9 parts by weight of 400 mesh steel slag powder are added and stirred evenly to obtain a high-performance polymer modified asphalt coating.

[0042] (2) The preparation of high performance polymer modified asphalt waterproof membrane is the same as that in Example 1.

[0043] Comparative Example 1 Compared with Example 1, in Comparative Example 1, vegetable oil is not used, solvent oil is used entirely, and EVA modifier is not used, as follows: (1) Preparation of high-performance polymer-modified asphalt At 170-185°C, 3 parts by weight of cyclohexane oil, 13 parts by weight of SBS and 3 parts by weight of SEBS are respectively added to 65 parts by weight of molten 90# petroleum asphalt, and then the temperature is maintained at 180°C. After the above-mentioned modifiers are completely swollen, 4 parts by weight of dicyclohexylmethane diisocyanate are added and the temperature is maintained at 170-190°C. After the dicyclohexylmethane diisocyanate is completely dissolved, 2 parts by weight of oil-soluble graphene quantum dots, 6 parts by weight of 400 mesh talc and 9 parts by weight of 400 mesh steel slag powder are added and stirred evenly to obtain a high-performance polymer modified asphalt coating.

[0044] (2) The preparation of high performance polymer modified asphalt waterproof membrane is the same as that in Example 1.

[0045] Comparative Example 2 Compared with Example 2, Comparative Example 2 does not use oil-soluble graphene quantum dots as antibacterial agents, specifically as follows: (1) Preparation of high-performance polymer-modified asphalt At 170-185°C, 1 part by weight of vegetable oil, 1 part by weight of cyclohexane oil, 13 parts by weight of SBS, 2 parts by weight of SEBS and 3 parts by weight of EVA are respectively added to 63 parts by weight of molten 70# petroleum asphalt, and then the temperature is maintained at 180°C. After the above-mentioned modifiers are completely swollen, 3 parts by weight of dicyclohexylmethane diisocyanate are added and the temperature is maintained at 170-190°C. After the dicyclohexylmethane diisocyanate is completely dissolved, 6 parts by weight of 400-mesh talc powder and 9 parts by weight of 400-mesh steel slag powder are added and stirred evenly to obtain a high-performance polymer modified asphalt coating.

[0046] (2) The preparation of high performance polymer modified asphalt waterproof membrane is the same as that in Example 1.

[0047] Comparative Example 3 Compared with Example 3, Comparative Example 3 uses aromatic oil instead of vegetable oil, does not use EVA modifier, does not use oil-soluble graphene quantum dot antibacterial agent, and does not use steel slag powder but talcum powder, as follows: (1) Preparation of high-performance polymer-modified asphalt At 170-185°C, 2 parts by weight of aromatic oil, 14 parts by weight of SBS and 4 parts by weight of SEBS are respectively added to 65 parts by weight of molten 70# petroleum asphalt, and then the temperature is maintained at 180°C. After the above-mentioned modifiers are completely swollen, 4 parts by weight of dicyclohexylmethane diisocyanate are added and the temperature is maintained at 170-190°C. After the dicyclohexylmethane diisocyanate is completely dissolved, 20 parts by weight of 400 mesh talc are added and stirred evenly to obtain a high-performance polymer modified asphalt coating.

[0048] (2) The preparation of high performance polymer modified asphalt waterproof membrane is the same as that in Example 1.

[0049] The performance of the modified asphalt waterproof membranes of the above embodiments and comparative examples was tested: the antibacterial property was implemented with reference to GB / T31402-2015; the low-temperature flexibility was evaluated with reference to GB / T328.14-2007, and the test temperature was -50°C; the waterproof property was tested according to GB / T328.10, and the results are shown in Table 1.

[0050] In conjunction with Table 1, by comparing Example 1 with Comparative Example 1, it can be seen that the addition of the vegetable oil and EVA can make the modifier fully swell and form a network structure, thereby ensuring the low-temperature flexibility of the waterproof membrane; by comparing Example 2 with Comparative Example 2, it can be seen that the addition of oil-soluble graphene quantum dots can significantly improve the antibacterial properties of the modified asphalt waterproof membrane, so that it meets the specification requirements; by comparing Example 3 with Comparative Example 3, it can be seen that when vegetable oil and oil-soluble graphene quantum dots are not added to the formula, the low-temperature flexibility and antibacterial properties of the modified asphalt waterproof membrane cannot meet the requirements; the results of Examples 1-4 all meet the expected requirements.

[0051] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the definition of the claims.

Claims

1. A high performance polymer modified asphalt, characterized in that: The invention comprises the following components in parts by weight: 60-65 parts of petroleum asphalt, 12-14 parts of SBS, 2-4 parts of SEBS, 2-4 parts of EVA, 1-3 parts of oil, 2-4 parts of cross-linking agent, 1-2 parts of antibacterial agent and 10-20 parts of inorganic filler.

2. The high performance polymer modified asphalt according to claim 1, characterized in that: The petroleum asphalt is one or more of 70# and 90# heavy-duty road petroleum asphalt; the SBS is selected from one or more of the brands YH1791, YH792, YH801, YH802, and 4402; the SEBS is selected from one or more of the brands YH-501, YH-502, YH-503, YH-561, and YH-602.

3. The high performance polymer modified asphalt according to claim 1, characterized in that: The oil is a mixture of solvent oil and vegetable oil, and the mass content of vegetable oil is not less than 50%; the solvent oil is one or more of reduced third-line oil, cycloparaffin oil and aromatic oil.

4. The high performance polymer modified asphalt according to claim 1, characterized in that: The cross-linking agent is dicyclohexylmethane diisocyanate.

5. The high performance polymer modified asphalt according to claim 1, characterized in that: The antibacterial agent is oil-soluble graphene quantum dots, the lateral size of which is less than 50 nm and the thickness is 0.5-1.0 nm.

6. The high performance polymer modified asphalt according to claim 1, characterized in that: The inorganic filler is selected from talcum powder and steel slag powder, and the mass proportion of the steel slag is 40% to 60%.

7. A method for preparing high-performance polymer modified asphalt according to any one of claims 1 to 6, characterized in that: The steps include: S1) adding the oil, SBS, SEBS and EVA to the molten petroleum asphalt at a temperature of 170-185° C. to swell the mixture to obtain a first mixture; S2) dissolving the cross-linking agent and the antibacterial agent in the first mixture at a temperature of 170-190° C., adding the inorganic filler, and stirring evenly to obtain the high-performance polymer modified asphalt.

8. A high performance polymer modified asphalt waterproofing membrane, characterized in that: The invention comprises, from top to bottom, an upper covering isolation layer, an upper surface asphalt coating layer, a reinforcement layer, a lower surface asphalt coating layer and a lower covering isolation layer, wherein the upper surface asphalt coating layer and the lower surface asphalt coating layer are both made of the high-performance polymer modified asphalt described in any one of claims 1-6.

9. The high performance polymer modified asphalt waterproofing membrane according to claim 8, characterized in that: The materials of the upper and lower covering isolation layers are selected from polyethylene film, fine sand or shale sheets; the reinforcement layer is a polyester base.

10. The high performance polymer modified asphalt waterproofing membrane according to claim 8, characterized in that: The thickness of the high-performance polymer modified asphalt waterproofing membrane is 3.0-4.5 mm.

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