High-durability high-temperature TPO (thermoplastic polyolefin) waterproof roll and preparation method thereof

Abstract

The invention provides a high-durability high-temperature TPO (thermoplastic polyolefin) waterproof roll and a preparation method thereof. The waterproof coiled material is prepared from the following raw materials in parts by weight: 90 to 100 parts of 70 # asphalt, 8 to 10 parts of rubber oil, 4 to 5 parts of butadiene styrene rubber, 8 to 10 parts of polypropylene particles, 16 to 20 parts of tire rubber powder, 16 to 20 parts of thermoplastic elastomer, 16 to 20 parts of filling master batch, 1 to 2 parts of color master batch, 2 to 3 parts of high-temperature additive, 1 to 2 parts of antioxidant, 1 to 2 parts of anti-aging agent, 1 to 2 parts of cross-linking agent and 2 to 3 parts of lubricant. 4-5 parts of filler and 8-10 parts of modified titanium dioxide. Direct irradiation of ultraviolet rays on the waterproof roll can be reduced, the weather resistance and chemical corrosion resistance of the waterproof roll are enhanced, the aging process of the waterproof roll is delayed, and the service life of the waterproof roll is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of waterproof coiled materials, and in particular to a high-durability and high-temperature TPO waterproof coiled material and a preparation method thereof. Background Art

[0002] Thermoplastic polyolefin (TPO) waterproofing membrane is a sheet-like thermoplastic polyolefin waterproofing membrane made of polyolefin resin made by the polymerization of ethylene propylene rubber and polypropylene. It is widely used in various industrial and civil building metal roofs, concrete roofs, and root-penetration-resistant planting roofs. It can also be used in waterproofing projects in underground spaces such as subways, civil air defense projects, and parking garages using the pre-laid reverse-adhesion method. The raw materials for preparing TPO waterproof membranes in the prior art generally include polyolefin elastomers, organic resins, talcum powder and other raw materials. Talc powder is used as a filler. The surface of talcum powder does not contain hydroxyl groups and other active ions, is weakly hydrophobic and chemically inert, and has poor compatibility with the polyolefin elastomer matrix. As a result, it is unevenly dispersed in the resin matrix of the waterproof membrane, which has a certain impact on the service life of the waterproof membrane. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a high-durability and high-temperature TPO waterproof membrane and a preparation method thereof.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present application discloses a high-durability and high-temperature TPO waterproofing membrane. The components of the waterproofing membrane include the following raw materials in parts by weight: 90-100 parts of No. 70 asphalt, 8-10 parts of rubber oil, 4-5 parts of styrene-butadiene rubber, 8-10 parts of polypropylene particles, 16-20 parts of tire rubber powder, 16-20 parts of thermoplastic elastomer, 16-20 parts of filler masterbatch, 1-2 parts of masterbatch, 2-3 parts of high-temperature additive, 1-2 parts of antioxidant, 1-2 parts of anti-aging agent, 1-2 parts of cross-linking agent, 2-3 parts of lubricant, 4-5 parts of filler and 8-10 parts of modified titanium dioxide.

[0005] Preferably, the components of the waterproof membrane include the following raw materials in parts by weight: 905 parts of No. 70 asphalt, 9 parts of rubber oil, 4.5 parts of styrene-butadiene rubber, 9 parts of polypropylene particles, 18 parts of tire rubber powder, 18 parts of thermoplastic elastomer, 18 parts of filler masterbatch, 1.5 parts of masterbatch, 2.5 parts of high-temperature additive, 1.5 parts of antioxidant, 1.5 parts of anti-aging agent, 1.5 parts of cross-linking agent, 2.5 parts of lubricant, 4.5 parts of filler and 9 parts of modified titanium dioxide.

[0006] Preferably, the model of the thermoplastic elastomer is one of SBS-LG501 and SBS-1401.

[0007] Preferably, the cross-linking agent is one or more of zinc peroxide, aluminum chloride, aluminum sulfate, dibenzoyl oxide, and dicumyl peroxide.

[0008] Preferably, the preparation method of modified titanium dioxide comprises the following steps: (1) taking a coupling agent and an isopropanol solution at a mass ratio of 1:1 for hydrolysis, adding acetic acid to adjust the pH to 4-5, and obtaining a hydrolyzed surface treatment agent; (2) Take titanium dioxide and disperse it in water, add the hydrolyzed surface treatment agent in a mass ratio of 1:3, stir for 25-30 minutes, dry and grind it, and then perform air flow pulverization to obtain modified titanium dioxide.

[0009] Preferably, the coupling agent is a silane coupling agent or a titanate coupling agent.

[0010] Preferably, the volume ratio of alcohol to water in the isopropanol solution is 1:4.

[0011] Preferably, the filler masterbatch is one or more of calcium carbonate, glass beads, and quartz sand.

[0012] The present application also discloses a method for preparing a high-durability and high-temperature TPO waterproofing membrane, comprising the following steps: S1. Weigh the raw materials according to the proportion, heat to 85-90℃, and mix thoroughly; S2. The mixed material obtained in S1 is extruded and granulated through a twin-screw extruder, and then calendered, cooled, shaped, and rolled up by three rollers to obtain a TPO waterproof membrane.

[0013] Preferably, in step S2, the extrusion temperature is 110-140°C, and the operating temperature of the three-roll calender is 70-75°C.

[0014] The beneficial effects of the present invention are: By hydrolyzing the hydrolyzable group of the coupling agent, one end after hydrolysis can undergo a condensation reaction with the surface hydroxyl group of titanium dioxide, so that a molecular bond force is formed between the coupling agent and titanium dioxide, and the interfacial bonding effect between the modified titanium dioxide and organic matter is enhanced. In addition, the modified titanium dioxide has a high ultraviolet reflection and scattering ability, which can reduce the direct exposure of ultraviolet rays to the waterproof membrane, enhance the weather resistance and chemical corrosion resistance of the waterproof membrane, and delay the aging process and service life of the waterproof membrane.

[0015] Asphalt 70 not only provides the necessary bonding properties in TPO waterproofing membranes, but also enhances the flexibility and durability of the material. Styrene-butadiene rubber can make waterproofing membranes produce special activity and enhance the bonding force between the various components in the waterproofing membranes.

[0016] Tire rubber powder can partially replace thermoplastic polyolefin materials, thereby reducing the cost of raw materials. Tire rubber powder is compounded with raw materials such as No. 70 asphalt, styrene-butadiene rubber, polypropylene, and thermoplastic elastomer particles to significantly improve and maintain the performance of waterproof membranes and reduce production costs. Thermoplastic elastomers are triblock copolymers with styrene and butadiene as monomers. They have the characteristics of rubber and thermoplastic plastics: good elasticity, large surface friction coefficient, and good tensile resistance. They are used to prepare waterproof membranes and have good elasticity and tensile resistance. Masterbatch can enhance the tensile strength, breaking strength, and fatigue resistance of TPO waterproof membranes, thereby improving their durability and service life. The role of high-temperature additives in the preparation of TPO waterproof membranes mainly includes improving the material's resistance to heat aging and yellowing. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are 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.

[0018] Embodiment 1: The present embodiment discloses a high-durability and high-temperature TPO waterproofing membrane, the components of which include the following raw materials in parts by weight: 90 parts of No. 70 asphalt, 8 parts of rubber oil, 4 parts of styrene-butadiene rubber, 8 parts of polypropylene particles, 16 parts of tire rubber powder, 16 parts of SBS-LG501, 16 parts of calcium carbonate, 1 part of masterbatch, 2 parts of high-temperature additive, 1 part of antioxidant, 1 part of anti-aging agent, 1 part of dibenzoyl oxide, 2 parts of lubricant, 4 parts of filler and 8 parts of modified titanium dioxide.

[0019] The preparation method of modified titanium dioxide comprises the following steps: (1) hydrolyzing a silane coupling agent and an isopropanol solution having a volume ratio of 1:1 to alcohol and water of 1:4, adding acetic acid to adjust the pH to 4, and obtaining a hydrolyzed surface treatment agent; (2) Take titanium dioxide and disperse it in water, add the hydrolyzed surface treatment agent in a mass ratio of 1:3, stir for 25 minutes, dry and grind it, and then perform air flow pulverization to obtain modified titanium dioxide.

[0020] This embodiment also discloses a method for preparing a high-durability and high-temperature TPO waterproof membrane, comprising the following steps: S1. Weigh the raw materials according to the proportion, heat to 85°C, and mix thoroughly; S2, extruding and granulating the mixture obtained in S1 through a twin-screw extruder, and then calendering, cooling, shaping, and winding with three rollers to obtain a TPO waterproof membrane; The extrusion temperature was 110°C and the operating temperature of the three-roll calender was 70°C.

[0021] Embodiment 2: The present embodiment discloses a high-durability and high-temperature TPO waterproofing membrane, the components of which include the following raw materials in parts by weight: 100 parts of No. 70 asphalt, 10 parts of rubber oil, 5 parts of styrene-butadiene rubber, 10 parts of polypropylene particles, 20 parts of tire rubber powder, 20 parts of SBS-1401, 20 parts of glass microbeads, 2 parts of masterbatch, 3 parts of high-temperature additive, 2 parts of antioxidant, 2 parts of anti-aging agent, 2 parts of aluminum chloride, 3 parts of lubricant, 5 parts of filler and 10 parts of modified titanium dioxide.

[0022] The preparation method of modified titanium dioxide comprises the following steps: (1) hydrolyzing a silane coupling agent and an isopropanol solution having a volume ratio of 1:1 to alcohol and water of 1:4, adding acetic acid to adjust the pH to 5, and obtaining a hydrolyzed surface treatment agent; (2) Take titanium dioxide and disperse it in water, add the hydrolyzed surface treatment agent in a mass ratio of 1:3, stir for 30 minutes, dry and grind it, and then perform air flow pulverization to obtain modified titanium dioxide.

[0023] This embodiment also discloses a method for preparing a high-durability and high-temperature TPO waterproof membrane, comprising the following steps: S1. Weigh the raw materials according to the proportion, heat to 90°C, and mix thoroughly; S2, extruding and granulating the mixture obtained in S1 through a twin-screw extruder, and then calendering, cooling, shaping, and winding with three rollers to obtain a TPO waterproof membrane; The extrusion temperature was 140°C and the operating temperature of the three-roll calender was 75°C.

[0024] Embodiment 3: The present embodiment discloses a high-durability and high-temperature TPO waterproofing membrane, the components of which include the following raw materials in parts by weight: 95 parts of No. 70 asphalt, 9 parts of rubber oil, 4.5 parts of styrene-butadiene rubber, 9 parts of polypropylene particles, 18 parts of tire rubber powder, 18 parts of SBS-1401, 18 parts of quartz sand, 1.5 parts of masterbatch, 2.5 parts of high-temperature additive, 1.5 parts of antioxidant, 1.5 parts of anti-aging agent, 1.5 parts of zinc oxide, 2.5 parts of lubricant, 4.5 parts of filler and 9 parts of modified titanium dioxide.

[0025] The preparation method of modified titanium dioxide comprises the following steps: (1) hydrolyzing a titanate coupling agent and an isopropanol solution having a volume ratio of alcohol to water of 1:4 in a mass ratio of 1:1, adding acetic acid to adjust the pH to 4.5, and obtaining a hydrolyzed surface treatment agent; (2) Take titanium dioxide and disperse it in water, add the hydrolyzed surface treatment agent in a mass ratio of 1:3, stir for 30 minutes, dry and grind it, and then perform air flow pulverization to obtain modified titanium dioxide.

[0026] This embodiment also discloses a method for preparing a high-durability and high-temperature TPO waterproof membrane, comprising the following steps: S1. Weigh all raw materials in proportion, heat to 87°C, and mix thoroughly; S2, extruding and granulating the mixture obtained in S1 through a twin-screw extruder, and then calendering, cooling, shaping, and winding with three rollers to obtain a TPO waterproof membrane; The extrusion temperature was 120°C and the operating temperature of the three-roll calender was 72°C.

[0027] Comparative Example 1: A high-durability and high-temperature TPO waterproofing membrane, the waterproofing membrane is different from Example 3 only in that: No. 70 asphalt is not added.

[0028] Comparative Example 2: A high-durability and high-temperature TPO waterproofing membrane, the waterproofing membrane is different from Example 3 only in that no rubber oil is added.

[0029] Comparative Example 3: A high-durability and high-temperature TPO waterproofing membrane, the waterproofing membrane is different from Example 3 only in that no tire rubber powder is added.

[0030] Comparative Example 4: A high-durability and high-temperature TPO waterproof membrane, the waterproof membrane is different from Example 3 only in that SBS-1401 is not added.

[0031] Comparative Example 5: A high-durability and high-temperature TPO waterproofing membrane, the waterproofing membrane is different from Example 3 only in that no masterbatch is added.

[0032] Comparative Example 6: A high-durability and high-temperature TPO waterproof membrane, the waterproof membrane is different from Example 3 only in that no modified titanium dioxide is added.

[0033] Comparative Example 7: A high-durability and high-temperature TPO waterproof membrane, the waterproof membrane is different from Example 3 only in that ordinary titanium dioxide is used instead of modified titanium dioxide.

[0034] The waterproof membranes obtained in the above-mentioned Examples 1-3 and Comparative Examples 1-7 were subjected to performance tests to measure the comprehensive performance of the waterproof membranes. The results are shown in Table 1.

[0035] Table 1 Performance parameters of the waterproof membranes obtained in Examples 1-3 and Comparative Examples 1-7 Group Tensile strength (MPa) Tear strength (KN / m) Artificial climate accelerated aging 3000h, tensile strength retention rate / % Example 1 20.4 74 99.4 Example 2 20.4 74 99.5 Example 3 20.6 74 99.5 Comparative Example 1 18.7 60 94.1 Comparative Example 2 14.8 71 92.7 Comparative Example 3 14.1 63 92.0 Comparative Example 4 13.7 61 91.8 Comparative Example 5 18.6 61 94.0 Comparative Example 6 16.4 70 95.8 Comparative Example 7 15.3 69 95.6 In summary, by hydrolyzing the hydrolyzable group of the coupling agent, one end after hydrolysis can undergo a condensation reaction with the surface hydroxyl group of titanium dioxide, so that a molecular bond force is formed between the coupling agent and titanium dioxide, and the interfacial bonding effect between the modified titanium dioxide and organic matter is enhanced. In addition, the modified titanium dioxide has a high ultraviolet reflection and scattering ability, which can reduce the direct exposure of ultraviolet rays to the waterproof membrane, enhance the weather resistance and chemical corrosion resistance of the waterproof membrane, and delay the aging process and service life of the waterproof membrane.

[0036] Asphalt 70 not only provides the necessary bonding properties in TPO waterproofing membranes, but also enhances the flexibility and durability of the material. Styrene-butadiene rubber can make waterproofing membranes produce special activity and enhance the bonding force between the various components in the waterproofing membranes.

[0037] Tire rubber powder can partially replace thermoplastic polyolefin materials, thereby reducing the cost of raw materials. Tire rubber powder is compounded with raw materials such as No. 70 asphalt, styrene-butadiene rubber, polypropylene, and thermoplastic elastomer particles to significantly improve and maintain the performance of waterproof membranes and reduce production costs. Thermoplastic elastomers are triblock copolymers with styrene and butadiene as monomers. They have the characteristics of rubber and thermoplastic plastics: good elasticity, large surface friction coefficient, and good tensile resistance. They are used to prepare waterproof membranes and have good elasticity and tensile resistance. Masterbatch can enhance the tensile strength, breaking strength, and fatigue resistance of TPO waterproof membranes, thereby improving their durability and service life. The role of high-temperature additives in the preparation of TPO waterproof membranes mainly includes improving the heat aging resistance and yellowing resistance of the material. .

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-durability and high-temperature TPO waterproof membrane, characterized in that: The waterproof coiled material comprises the following raw materials in parts by weight: 90-100 parts of No. 70 asphalt, 8-10 parts of rubber oil, 4-5 parts of styrene-butadiene rubber, 8-10 parts of polypropylene particles, 16-20 parts of tire rubber powder, 16-20 parts of thermoplastic elastomer, 16-20 parts of filler masterbatch, 1-2 parts of masterbatch, 2-3 parts of high-temperature auxiliary agent, 1-2 parts of antioxidant, 1-2 parts of anti-aging agent, 1-2 parts of cross-linking agent, 2-3 parts of lubricant, 4-5 parts of filler and 8-10 parts of modified titanium dioxide.

2. The high-durability and high-temperature TPO waterproof membrane according to claim 1, characterized in that: The components of the waterproof coiled material include the following raw materials in parts by weight: 905 parts of No. 70 asphalt, 9 parts of rubber oil, 4.5 parts of styrene-butadiene rubber, 9 parts of polypropylene particles, 18 parts of tire rubber powder, 18 parts of thermoplastic elastomer, 18 parts of filler masterbatch, 1.5 parts of masterbatch, 2.5 parts of high-temperature additive, 1.5 parts of antioxidant, 1.5 parts of anti-aging agent, 1.5 parts of cross-linking agent, 2.5 parts of lubricant, 4.5 parts of filler and 9 parts of modified titanium dioxide.

3. The high-durability and high-temperature TPO waterproof membrane according to claim 2, characterized in that: The model of the thermoplastic elastomer is one of SBS-LG501 and SBS-1401.

4. The high-durability and high-temperature TPO waterproof membrane according to claim 2, characterized in that: The cross-linking agent is selected from one or more of zinc peroxide, aluminum chloride, aluminum sulfate, dibenzoyl oxide, and dicumyl peroxide.

5. The high-durability and high-temperature TPO waterproof membrane according to claim 2, characterized in that: The preparation method of modified titanium dioxide comprises the following steps: (1) taking a coupling agent and an isopropanol solution at a mass ratio of 1:1, hydrolyzing them, adding acetic acid to adjust the pH to 4-5, and obtaining a hydrolyzed surface treatment agent; (2) Take titanium dioxide and disperse it in water, add the hydrolyzed surface treatment agent in a mass ratio of 1:3, stir for 25-30 minutes, dry and grind it, and then perform air flow pulverization to obtain modified titanium dioxide.

6. The high-durability and high-temperature TPO waterproof membrane according to claim 5, characterized in that: The coupling agent is selected from a silane coupling agent or a titanate coupling agent.

7. The high-durability and high-temperature TPO waterproof membrane according to claim 5, characterized in that: The volume ratio of alcohol to water in the isopropanol solution is 1:

4.

8. The high-durability and high-temperature TPO waterproof membrane according to claim 5, characterized in that: The filler masterbatch is one or more of calcium carbonate, glass beads and quartz sand.

9. A method for preparing a high-durable and high-temperature TPO waterproof membrane according to any one of claims 1 to 8, characterized in that: The preparation method comprises the following steps: S1. Weigh the raw materials according to the proportion, heat to 85-90℃, and mix thoroughly; S2. The mixed material obtained in S1 is extruded and granulated through a twin-screw extruder, and then calendered, cooled, shaped, and rolled up by three rollers to obtain a TPO waterproof membrane.

10. The high-durability and high-temperature TPO waterproofing membrane according to claim 5, characterized in that: In step S2, the extrusion temperature is 110-140°C, and the operating temperature of the three-roll calender is 70-75°C.