Self-adhesive polymer modified asphalt waterproof coiled material and preparation method thereof

Abstract

The invention provides a self-adhesive polymer modified asphalt waterproof coiled material and a preparation method thereof. The preparation method specifically comprises the following steps: S1, preparing OMMT / SBS modified asphalt; s2, adding a functional polymer into the OMMT / SBS modified asphalt, stirring, heating and dehydrating; s3, adding an elastoplastic body, stirring and swelling, and starting a colloid mill to grind and homogenize; s4, adding the tackifying resin, and stirring until the tackifying resin is completely dissolved; s5, adding a stabilizer, and stirring to obtain self-adhesive polymer modified asphalt; s6, coating the polyester base with the prepared self-adhesive polymer modified asphalt, and controlling the thickness of the coiled material by a roller pair; and S7, coating the coiled material with a silicone oil isolating membrane and an aluminum foil, and cooling the surface of the coiled material with cooling water to obtain a finished product. The preparation process is optimized and innovated, and the functional polymer, the elastoplastic body, the tackifying resin and the stabilizer are added, so that the peel strength, the holding power, the low-temperature property, the mechanical property, the thermal aging resistance and the like of the waterproof coiled material can be effectively enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt waterproof coiled materials, and particularly relates to a self-adhesive polymer modified asphalt waterproof coiled material and a preparation method thereof. Background Art

[0002] In recent years, with the rapid development of new building waterproof materials, the materials and applications have entered a stage of diversified development. The self-adhesive polymer modified asphalt waterproof coiled material has extremely strong bonding performance and self-healing property, good low-temperature resistance, can realize the attached full adhesion of the waterproof layer and the structural layer, and achieve the "skin type" waterproof effect. It is the best waterproof, moisture-proof and sealing material for building construction, subway, tunnel and non-flammable sites. Moreover, due to the increasing requirements for construction safety, environmental protection, etc., the self-adhesive polymer modified asphalt waterproof coiled material eliminates the safety and environmental pollution problems of hot-melt construction method, meets the social needs of low-carbon environmental protection, and is favored by many design units and construction units.

[0003] In the prior art, there have been many reports on self-adhesive polymer modified asphalt waterproof coiled materials. For example, Chinese Patent with publication number CN112300757A discloses a self-adhesive polymer modified asphalt waterproof coiled material and its preparation method and application. The self-adhesive polymer modified asphalt waterproof coiled material includes the following substances in corresponding parts by weight: 45-50 parts of road petroleum asphalt, 12-16 parts of aromatic oil, 3-6 parts of SBS, 10-15 parts of calcium carbonate, 12-15 parts of modified rubber powder, 3-6 parts of flexible vinyl resin, 4-7 parts of hydrogenated rosin resin, 2-5 parts of thermoplastic ethylene-propylene-diene monomer. This waterproof coiled material has good holding tackiness, heat resistance and excellent peel strength and other characteristics, with good comprehensive quality and long service life.

[0004] Another example is Chinese Patent with publication number CN114958237A, which discloses a reinforced self-adhesive polymer modified asphalt polyester felt waterproof coiled material, including an isolation layer, a polyester felt base and a modified asphalt material. The modified asphalt material includes the following raw materials in parts by weight: 55-65 parts of asphalt matrix, 17-20 parts of machine oil, 15-18 parts of self-adhesive polymer, 0.3-0.5 parts of modified graphene oxide, 0.2-0.3 parts of silane coupling agent, 12-15 parts of talcum powder. The waterproof coiled material with the advantages of heat resistance, cold resistance, corrosion resistance, anti-aging, good thermoplasticity, large tensile strength, high elongation rate, strong tear resistance, etc. improves its flammable characteristics on the basis of enhancing the mechanical properties of asphalt by adding modified graphene oxide.

[0005] However, the existing self-adhesive polymer modified asphalt waterproof coiled materials still have defects such as poor elastic-plastic properties, poor heat resistance, low peel strength, poor holding tackiness, and low heat aging strength, so improvement is needed. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention proposes a self-adhesive polymer modified bitumen waterproofing membrane and a preparation method thereof. By modifying bitumen and optimizing and innovating the preparation process, adding functional polymers, elastoplastic bodies, tackifying resins and stabilizers, the peel strength, holding tack, low temperature performance, mechanical properties and heat aging resistance performance of the waterproofing membrane can be effectively enhanced.

[0007] To achieve the above technical solutions, the present invention provides a preparation method for a self-adhesive polymer modified bitumen waterproofing membrane, which specifically includes the following steps:

[0008] S1. By weight, heat 100 parts of bitumen to a molten state and pour it into a stirring tank, keep it warm at 170 - 190 °C for 10 minutes, then add 15 - 20 parts of SBS to the stirring tank, stir with a high-speed shearer at 4000 r / min for 0.5 h, add 2 - 5 parts of OMMT and continue to stir for 1.5 h to obtain OMMT / SBS modified bitumen;

[0009] S2. Add 10 - 15 parts of functional polymer to the OMMT / SBS modified bitumen, stir and heat up to 140 - 165 °C, and dehydrate for 50 - 75 min;

[0010] S3. Add 2 - 8 parts of elastoplastic body, stir and swell for 10 - 45 min, then start the colloid mill to grind and homogenize. After grinding for 50 - 120 min, control the temperature at 160 - 175 °C. When the mixture is completely melted, turn off the colloid mill, and the grinding and homogenization are completed;

[0011] S4. Add 1 - 5 parts of tackifying resin, control the temperature at 160 - 175 °C and stir for 40 - 60 min until completely dissolved;

[0012] S5. Add 0.1 - 1 part of stabilizer, keep the temperature at 155 - 165 °C and stir for 40 - 60 min to obtain self-adhesive polymer modified bitumen;

[0013] S6. Apply the prepared self-adhesive polymer modified bitumen on a polyester base, and control the thickness of the waterproofing membrane by a pair of rollers, and the thickness value is 2 - 5 mm;

[0014] S7. Cover the waterproofing membrane with a silicone oil release film and an aluminum foil, and cool its surface with cooling water to obtain the finished product.

[0015] Preferably, in step S1, by weight, the addition amount of bitumen is 100 parts, the addition amount of SBS is 17 parts, and the addition amount of OMMT is 3 parts.

[0016] Preferably, in step S2, the functional polymer is one of EVA, APP or PE, and the addition amount is 12 parts.

[0017] Preferably, in step S3, the elastomer is one of NR, CR, and IR, and the addition amount is 6 parts.

[0018] Preferably, in step S4, the tackifying resin is one of petroleum resin, rosin resin, and terpene resin, and the addition amount is 4 parts.

[0019] Preferably, in step S5, the stabilizer is one of DCP and MAH-g-PE, and the addition amount is 0.5 part.

[0020] The present invention also provides a self-adhesive polymer modified asphalt waterproof coil, which is prepared by the above method.

[0021] The beneficial effects of the self-adhesive polymer modified asphalt waterproof coil and the preparation method provided by the present invention are as follows:

[0022] 1) By using OMMT (montmorillonite) and SBS (styrene-butadiene-styrene block copolymer) to jointly modify asphalt, the present invention significantly improves the peel strength, holding tack, and low temperature performance of the modified asphalt, and at the same time can greatly improve the thermal aging resistance and mechanical properties of the modified asphalt.

[0023] 2) Through the optimization and innovation of the preparation process, the present invention adds functional polymers, elastomers, tackifying resins, and stabilizers, and by controlling the preparation temperature and time, can effectively enhance the peel strength, holding tack, low temperature performance, mechanical properties, thermal aging resistance performance, etc. of the waterproof coil. Description of the Drawings

[0024] Figure 1 It is a flow chart of the present invention. Detailed Embodiments

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Example 1: A preparation method of a self-adhesive polymer modified asphalt waterproof coil.

[0027] Referring to Figure 1 As shown, a preparation method of a self-adhesive polymer modified asphalt waterproof coil specifically includes the following steps:

[0028] S1. By weight, heat 100 parts of asphalt to a molten state and pour it into a stirring tank. Keep it at 180 °C for 10 minutes. Then add 17 parts of SBS (styrene-butadiene-styrene block copolymer) to the stirring tank and stir with a high-speed shearer at 4000 r / min for 0.5 h. Add 3 parts of OMMT (montmorillonite) and continue stirring for 1.5 h to obtain OMMT / SBS modified asphalt;

[0029] S2. Add 12 parts of EVA (ethylene-vinyl acetate copolymer) functional polymer to the OMMT / SBS modified asphalt, stir and heat up to 155 °C, and dehydrate for 60 min;

[0030] S3. Add 6 parts of CR (chloroprene rubber) elastomer, stir and swell for 30 min, then start the colloid mill for grinding and homogenization. After 90 min of grinding, control the temperature at 170 °C. Wait until the mixture is completely melted, then turn off the colloid mill, and the grinding and homogenization are completed;

[0031] S4. Add 4 parts of petroleum resin as a tackifying resin, control the temperature at 170 °C and stir for 60 min until completely dissolved;

[0032] S5. Add 0.5 part of DCP (sulfur or peroxide) stabilizer, keep the temperature at 160 °C and stir for 60 min to obtain self-adhesive polymer modified asphalt;

[0033] S6. Coat the prepared self-adhesive polymer modified asphalt on a polyester base, and control the thickness of the coil by a pair of rollers, and the thickness value is 4 mm;

[0034] S7. Cover the coil with a silicone oil release film and aluminum foil, and cool its surface with cooling water to obtain the finished product.

[0035] Example 2: A preparation method of a self-adhesive polymer modified asphalt waterproof coil.

[0036] A preparation method of a self-adhesive polymer modified asphalt waterproof coil specifically includes the following steps:

[0037] S1. By weight, heat 100 parts of asphalt to a molten state and pour it into a stirring tank. Keep it at 180 °C for 10 minutes. Then add 18 parts of SBS (styrene-butadiene-styrene block copolymer) to the stirring tank and stir with a high-speed shearer at 4000 r / min for 0.5 h. Add 2 parts of OMMT (montmorillonite) and continue stirring for 1.5 h to obtain OMMT / SBS modified asphalt;

[0038] S2. Add 12 parts of APP (atactic polypropylene) functional polymer to the OMMT / SBS modified asphalt, stir and heat up to 155 °C, and dehydrate for 60 min;

[0039] S3. Add 6 parts of NR (natural rubber) elastomer, stir and swell for 30 min, then start the colloid mill for grinding and homogenization. After 90 min of grinding with the temperature controlled at 170 °C, when the mixture is completely melted, turn off the colloid mill to complete the grinding and homogenization;

[0040] S4. Add 4 parts of terpene resin as the tackifying resin, and stir at 170 °C for 60 min until completely dissolved;

[0041] S5. Add 0.5 part of MAH-g-PE (maleic anhydride grafted polymer) stabilizer, and stir at 160 °C for 60 min to obtain the self-adhesive polymer modified asphalt;

[0042] S6. Coat the obtained self-adhesive polymer modified asphalt on the polyester base, and control the thickness of the coil by the opposed rollers, with the thickness value being 4 mm;

[0043] S7. Cover the coil with a silicone oil release film and aluminum foil, and cool its surface with cooling water to obtain the finished product.

[0044] Comparative Example 1

[0045] Do not perform step S1, directly use asphalt to replace the modified OMMT / SBS modified asphalt for steps S2 to S7, and the other technical features are the same as those in Example 1.

[0046] Comparative Example 2

[0047] Do not perform step S2 (do not add 12 parts of EVA (ethylene-vinyl acetate copolymer) functional polymer), and the other technical features are the same as those in Example 1.

[0048] Comparative Example 3

[0049] Do not perform step S3 (do not add 6 parts of CR (chloroprene rubber) elastomer), and the other technical features are the same as those in Example 1.

[0050] Comparative Example 4

[0051] Do not perform step S4 (do not add 4 parts of petroleum resin as the tackifying resin), and the other technical features are the same as those in Example 1.

[0052] Comparative Example 5

[0053] Do not perform step S5 (do not add 0.5 part of DCP (sulfur or peroxide) stabilizer), and the other technical features are the same as those in Example 1.

[0054] Test Results

[0055] The properties of the corrosion-resistant high-viscosity self-adhesive polymer modified asphalt waterproof coiled materials in Examples 1-2 and Comparative Examples 1-4 were tested according to the test methods of GB / T 23441-2009 and GB / T 23457-2017. The test results are shown in Table 1:

[0056] Table 1 Test Results of Different Samples

[0057]

[0058] It can be seen from the data of Examples 1-2 that the self-adhesive polymer modified asphalt waterproof coiled materials prepared by the method of the present invention have good peel strength, holding tack, low temperature performance, mechanical properties and thermal aging resistance performance.

[0059] By comparing the data of Example 1 and Comparative Example 1, it can be seen that by using OMMT (montmorillonite) and SBS (styrene-butadiene-styrene block copolymer) to modify asphalt jointly in the present invention, the peel strength, holding tack and low temperature performance of the modified asphalt are significantly improved, and at the same time, the thermal aging resistance and mechanical properties of the modified asphalt can be greatly improved.

[0060] By comparing the data of Example 1 and Comparative Example 2, it can be seen that the addition of the functional polymer can effectively improve the peel strength, holding tack and thermal aging resistance performance of the final product.

[0061] By comparing the data of Example 1 and Comparative Example 3, it can be seen that the addition of the elastoplastic body can effectively improve the low temperature performance and mechanical properties of the final product, endow the asphalt with the balance of elasticity and plasticity, and especially improve the low temperature crack resistance performance.

[0062] By comparing the data of Example 1 and Comparative Example 4, it can be seen that the addition of the tackifying resin can effectively improve the peel strength, holding tack and mechanical properties of the final product, and improve the bonding force of the final product mixture.

[0063] By comparing the data of Example 1 and Comparative Example 5, it can be seen that the addition of the stabilizer can effectively improve the thermal aging resistance performance of the final product, and prevent the aging, phase separation or performance degradation of the modified asphalt.

[0064] Through the optimization and innovation of the preparation process, the present invention adds a functional polymer, an elastoplastic body, a tackifying resin and a stabilizer, and by controlling the preparation temperature and time, the peel strength, holding tack, low temperature performance, mechanical properties and thermal aging resistance performance of the waterproof coiled material can be effectively enhanced.

[0065] The above are the preferred embodiments of the present invention, but the present invention should not be limited to the content disclosed in this embodiment and the drawings. Therefore, all equivalent or modified implementations completed without departing from the spirit disclosed by the present invention fall within the protection scope of the present invention.

Claims

1. A preparation method of a self-adhesive polymer modified asphalt waterproof coiled material, characterized in that Specifically, it includes the following steps: S1. By weight, heat 100 parts of asphalt to a molten state and pour it into a stirring tank. Keep it warm at 170 - 190 °C for 10 minutes. Then add 15 - 20 parts of SBS into the stirring tank. Stir with a high-speed shearing machine at 4000 r / min for 0.5 h. Add 2 - 5 parts of OMMT and continue stirring for 1.5 h to obtain OMMT / SBS modified asphalt; S2. Add 10 - 15 parts of functional polymer into the OMMT / SBS modified asphalt. Stir and heat up to 140 - 165 °C, and dehydrate for 50 - 75 min; S3. Add 2 - 8 parts of elastoplastic body. After stirring and swelling for 10 - 45 min, start the colloid mill for grinding and homogenization. After 50 - 120 min of grinding, control the temperature at 160 - 175 °C. Wait until the mixture is completely molten, then turn off the colloid mill, and the grinding and homogenization are completed; S4. Add 1 - 5 parts of tackifying resin. Control the temperature at 160 - 175 °C and stir for 40 - 60 min until it is completely dissolved; S5. Add 0.1 - 1 part of stabilizer. Keep the temperature at 155 - 165 °C and stir for 40 - 60 min to obtain self-adhesive polymer modified asphalt; S6. Coating the obtained self-adhesive polymer modified asphalt on a polyester base. Control the thickness of the coil by a pair of rollers, and the thickness value is 2 - 5 mm; S7. Cover a silicone oil isolation film and aluminum foil on the coil, and cool its surface with cooling water to obtain the finished product.

2. The preparation method of the self-adhesive polymer modified asphalt waterproof coiled material according to claim 1, characterized in that, In the step S1, by weight, the addition amount of asphalt is 100 parts, the addition amount of SBS is 17 parts, and the addition amount of OMMT is 3 parts.

3. The preparation method of the self-adhesive polymer modified bitumen waterproof coil according to claim 1, characterized in that, In the step S2, the functional polymer is one of EVA, APP or PE, and the addition amount is 12 parts.

4. The highly flame-retardant and long-life thermoplastic polyolefin waterproof coiled material according to claim 1, wherein In the step S3, the elastoplastic body is one of NR, CR, IR, and the addition amount is 6 parts.

5. The highly flame-retardant and long-life thermoplastic polyolefin waterproof coiled material according to claim 1, wherein In the step S4, the tackifying resin is one of petroleum resin, rosin resin, terpene resin, and the addition amount is 4 parts.

6. The highly flame-retardant and long-life thermoplastic polyolefin waterproof coiled material according to claim 1, characterized in that In the step S5, the stabilizer is one of DCP, MAH-g-PE, and the addition amount is 0.5 parts.

7. A self-adhesive polymer modified bitumen waterproofing membrane, characterized in that: Obtained by any of the methods as claimed in claims 1 - 6.

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