CN110951192A - Anti-aging modified polyvinyl chloride waterproof roll and preparation method thereof - Google Patents
Anti-aging modified polyvinyl chloride waterproof roll and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
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- C08K2003/265—Calcium, strontium or barium carbonate
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention relates to an anti-aging modified polyvinyl chloride waterproof coiled material and a preparation method thereof, wherein the waterproof coiled material is mainly prepared from the following raw materials in parts by weight: 100 parts of PVC resin, 20-30 parts of dioctyl terephthalate, 10-15 parts of tributyl citrate, 10-15 parts of trioctyl trimellitate, 13-15 parts of nitrile rubber, 6-8 parts of EVA (ethylene vinyl acetate) elastomer, 8-10 parts of magnesium aluminum hydrotalcite, 8-10 parts of organic montmorillonite, 8-10 parts of ground calcium carbonate, 5-6 parts of titanium dioxide, 0.4-0.5 part of silane coupling agent, 5-6 parts of calcium-zinc composite stabilizer, 1.5-2 parts of light stabilizer, 0.5-1.5 parts of lubricant, 0.5-1.5 parts of antioxidant and 0-5 parts of colorant. The waterproof coiled material has good mechanical property and high mechanical strength; the heat resistance is good, and the size is stable; has good low-temperature flexibility and waterproof performance, excellent thermal aging resistance and weather aging resistance and long service life.
Description
Technical Field
The invention belongs to the technical field of waterproof coiled materials, and particularly relates to an anti-aging modified polyvinyl chloride waterproof coiled material and a preparation method thereof.
Background
The waterproof material is an essential important functional material for buildings and related industries, and waterproof coiled materials are used for preventing the buildings from leaking in engineering. The high polymer waterproof coiled material is a novel building waterproof material which develops very rapidly in recent years, and has the following advantages: the homogeneity is good, the whole process adopts mechanized production, and the product quality can be better controlled; the tensile strength is high, the flexibility at low temperature is good, the elongation is large, and the stretching and deformation of a building structure layer under the condition of no weather are adapted; and cold construction is adopted, so that the difficulty is low, and the environmental pollution is reduced.
The polyvinyl chloride (PVC) waterproof roll is widely used in high polymer waterproof rolls, is prepared by taking PVC resin as a main raw material and assisting various modifiers, auxiliaries, fillers and the like through the working procedures of mixing, extruding or calendering and the like, and comprises a homogeneous roll (code H) without a composite layer, a lined roll (code L) with fibers, a reinforced roll (code P) in fabric, a reinforced roll (code G) in glass fibers and a lined roll (code GL) with fibers in glass fibers. The PVC resin has flame retardance, insulativity, corrosion resistance, antibacterial and mildewproof property and the like, and endows the PVC waterproof coiled material with excellent basic performance. The PVC waterproof roll has stable quality and reliable performance, and mainly has the following characteristics: the resin raw material has rich sources, moderate price and relatively low cost; PVC resin is easy to modify, and coiled materials with different advantageous properties can be obtained by using different modifiers and auxiliaries, so that the applicability is strong; the welding is easy, the hot welding can be carried out at the lap joint on the cold construction foundation, the lap joint strength is high, and the construction is convenient; the water vapor permeability resistance and penetration resistance are strong, and the method is particularly suitable for underground engineering, hydraulic engineering and the like.
However, PVC has poor thermal stability, so that HCl removal autocatalysis reaction can occur when the PVC is subjected to high-energy radiation or heated, and the product is caused to change color, the mechanical property is reduced and the like; in the actual use process, the PVC waterproof coiled material often has the problem of poor durability, mainly caused by material aging, for example, under the action of heat, due to a defect structure (unstable structure unit, such as allyl chloride, branched chain, tertiary chloride and the like) in a molecular chain, HCl-removing autocatalytic chain reaction occurs to degrade, so that the material is degraded; photo-oxidative aging and degradation occur under long-term irradiation of sunlight, so that surface cracking is caused; plasticizer molecules in the coiled material migrate along with the prolonging of the service time, and the material losing the plasticizer shrinks, hardens and the like, and even leads to the failure of the waterproof coiled material in serious cases. The above conditions can cause serious problems of water failure and building leakage, and the problems of later maintenance and repair are high in difficulty and cost. Therefore, research and development of a polyvinyl chloride waterproof coiled material with good aging resistance is a technical problem to be solved.
Disclosure of Invention
The invention aims to provide an anti-aging modified polyvinyl chloride waterproof coiled material which has excellent thermal aging resistance and weather aging resistance.
The second purpose of the invention is to provide a preparation method of the anti-aging modified polyvinyl chloride waterproof roll.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an anti-aging modified polyvinyl chloride waterproof coiled material is mainly prepared from the following raw materials in parts by weight: 100 parts of PVC resin, 20-30 parts of dioctyl terephthalate, 10-15 parts of tributyl citrate, 10-15 parts of trioctyl trimellitate, 13-15 parts of nitrile rubber, 6-8 parts of EVA (ethylene vinyl acetate) elastomer, 8-10 parts of magnesium aluminum hydrotalcite, 8-10 parts of organic montmorillonite, 8-10 parts of ground calcium carbonate, 5-6 parts of titanium dioxide, 0.4-0.5 part of silane coupling agent, 5-6 parts of calcium-zinc composite stabilizer, 1.5-2 parts of light stabilizer, 0.5-1.5 parts of lubricant, 0.5-1.5 parts of antioxidant and 0-5 parts of colorant.
The polymerization degree of the PVC resin is 1000-1500.
The total mass of the dioctyl terephthalate, the tributyl citrate and the trioctyl trimellitate is not less than 50% of the mass of the PVC resin.
The total mass of the nitrile rubber and the EVA elastomer is not less than 20% of the mass of the PVC resin.
The silane coupling agent is KH-550 (gamma-aminopropyltriethoxysilane).
The light stabilizer comprises a hindered amine light stabilizer and an ultraviolet absorber; the lubricant is oxidized polyethylene wax; the antioxidant comprises an antioxidant 1010 and an antioxidant 1076.
The preparation method of the anti-aging modified polyvinyl chloride waterproof roll comprises the following steps:
1) adding the magnalium hydrotalcite, the heavy calcium carbonate, the titanium pigment and the silane coupling agent with the formula ratio into an ethanol-water mixed solution for wet grinding, wherein the mass ratio of grinding balls to materials to liquid in the wet grinding process is 4:1.8-2.2:0.8-1.2, and drying after wet grinding to obtain a modified filler;
2) adding the modified filler obtained in the step 1), PVC resin powder and other raw materials in a formula ratio into a high-speed mixer, heating to 100-110 ℃, and mixing for 20-30min to obtain a mixture;
3) and (3) plasticizing and extruding the mixture obtained in the step 2) in a double-screw extruder, carrying out calendaring molding by a three-roll calender, and cooling and drawing to obtain the material.
The ethanol-water mixed solution in the step 1) is prepared by mixing absolute ethanol and water according to the mass ratio of 7-9: 1-3.
In the step 1), the materials refer to magnesium aluminum hydrotalcite, heavy calcium carbonate, titanium dioxide and a silane coupling agent; the liquid refers to an ethanol-water mixed liquid.
In the step 3), the barrel temperature of the double-screw extruder is 140-170 ℃, and the die head temperature is 165-175 ℃. The rotating speed of the screw of the main machine is controlled at 25-35rpm, and the load of the main machine is controlled at 70-80%.
In the step 3), the roller temperature of the three-roller calender is 50-70 ℃.
The aging-resistant modified polyvinyl chloride waterproof coiled material disclosed by the invention takes PVC resin as a main raw material, and takes dioctyl terephthalate, tributyl citrate and trioctyl trimellitate as a plasticizer in a compounding way, so that on one hand, the plasticizer which is easy to volatilize and migrate or easy to pollute the environment and damage the health, such as phthalate, is avoided. On the other hand, dioctyl terephthalate has the characteristics of low cost and good comprehensive performance, and meanwhile, the dioctyl terephthalate also has good heat resistance and cold resistance, is difficult to volatilize and migrate, is difficult to pollute the environment and damage the health, and is used as a main plasticizer; the tributyl citrate has the characteristics of difficult volatilization, no toxicity, water resistance, light and heat resistance, good stability and durability, has good compatibility with PVC, does not pollute the environment, and is an environment-friendly long-acting plasticizer which is difficult to migrate; the trioctyl trimellitate has the characteristics of high temperature resistance, migration resistance and weather resistance, and has good compatibility with PVC. The dioctyl terephthalate and the trioctyl trimellitate are jointly used as the auxiliary plasticizer and are matched with the main plasticizer dioctyl terephthalate for use, so that the acting force among PVC molecular chains is reduced, the plasticity of PVC is improved, the PVC has good low-temperature resistance, various basic performances of the PVC waterproof coiled material can be ensured, the PVC waterproof coiled material is stable in property, safe and reliable, various performances of the PVC after thermal aging resistance and weather aging resistance can be improved, and the service life of the PVC waterproof coiled material is prolonged.
According to the aging-resistant modified polyvinyl chloride waterproof coiled material, the acrylonitrile butadiene rubber and the EVA (ethylene-vinyl acetate copolymer) elastomer are compounded to be used as the toughening agent, so that on one hand, a chlorine-containing toughening agent such as chlorinated polyethylene is avoided, and the self-catalytic reaction of HCl removal caused by heating of a defect structure containing chlorine ions is avoided. On the other hand, nitrile rubber (NBR) is synthetic rubber prepared by copolymerizing butadiene and acrylonitrile, has excellent oil resistance, air tightness, adhesion, low temperature resistance and aging resistance, has the reaction activity of alkene, and can improve the processability of PVC; the EVA elastomer has good compatibility with PVC, is used as an auxiliary toughening agent, introduces flexible molecular chain EVA (ethylene-vinyl acetate copolymer) segment into rigid molecular chain of PVC, can obviously improve the toughness of PVC, and improves the low temperature resistance, impact resistance and weather resistance of the PVC; the composite material is matched with a main toughening agent NBR, so that the cold resistance, the heat resistance and the light resistance of PVC can be improved, the rebound resilience and the impact resistance of the waterproof coiled material can be improved, and the heat aging resistance and the weather aging resistance of the waterproof coiled material can be improved.
The aging-resistant modified polyvinyl chloride waterproof coiled material is prepared from magnesium-aluminum hydrotalcite, organic montmorillonite and heavy metalThe calcium carbonate and the titanium dioxide are compounded to be used as the filler. The ground limestone has low price and good performance, and can improve the dimensional stability, surface hardness and rigidity of the waterproof roll material when being used as a filler; the Mg-Al hydrotalcite is a layered hydroxide consisting of Mg-Al elements, has weak alkalinity, and generates Cl in HCl by degrading interlayer anions and PVC-Exchange reaction is carried out to absorb HCl generated by PVC degradation, so that the autocatalytic chain reaction for removing HCl from PVC is reduced or terminated; the PVC resin has good thermal stability and meets the thermal requirements of PVC during processing and use. The organic montmorillonite is dispersed in PVC in a lamellar structure, has excellent gas barrier property and micromolecule swelling resistance and permeability, has good heat resistance and reinforcement effect on one hand, improves the tensile strength and elongation at break of the waterproof coiled material, and prevents the waterproof coiled material from being greatly reduced due to thermal aging or weather aging; on the other hand, the excellent barrier property can prevent hot oxygen, moisture and the like from entering the material, improve the thermal stability and the water resistance of the material, prolong the migration path of small molecules in the material, and reduce and prevent the migration and overflow of the small molecules. The titanium dioxide has excellent light shielding property, and is used as a filler to be doped into PVC, so that the light and heat aging resistance of the material is improved.
The aging-resistant modified polyvinyl chloride waterproof coiled material is prepared by adopting the compounded plasticizer, the toughening agent and the filler system and then adding the calcium-zinc composite stabilizer, the light stabilizer, the lubricant, the antioxidant and the colorant. Through detection, the detection results of various indexes of the anti-aging modified polyvinyl chloride waterproof coiled material disclosed by the invention far exceed the index requirements of GB12952 polyvinyl chloride (PVC) waterproof coiled material on a homogeneous coiled material (code number H). The anti-aging modified polyvinyl chloride waterproof coiled material has good mechanical property and high mechanical strength; the heat resistance is good, and the size is stable; the low-temperature flexible waterproof coating has good low-temperature flexibility, waterproof performance and impact resistance; high tearing strength, and is firm and durable. After the heat aging and the artificial climate accelerated aging, the appearance is not obviously changed, the tensile strength and the elongation at break are reduced, the temperature of cracks in a low-temperature bending test is increased, but the influence on each index is small, the index is still far beyond the index requirement specified by GB12952 polyvinyl chloride (PVC) waterproof coiled material on a homogeneous coiled material (code number H), the tensile strength retention rate and the elongation at break retention rate are high, the heat aging resistance and the weather aging resistance are good, the applicability is wider, and the service life is long.
The preparation method of the aging-resistant modified polyvinyl chloride waterproof coiled material comprises the steps of adding the magnesium-aluminum hydrotalcite, the heavy calcium carbonate, the titanium dioxide and the silane coupling agent into the ethanol-water mixed solution for wet grinding, and drying to obtain the modified filler; the silane coupling agent is used for carrying out surface modification on the filler, so that the compatibility of the filler and a PVC matrix is improved, the filler is uniformly dispersed in PVC, and the excellent properties of the filler can be exerted; adding the obtained modified filler, PVC resin powder and other raw materials into a high-speed mixer, heating and mixing to obtain a mixture, and uniformly mixing the raw materials; and (3) plasticizing and extruding the mixture in a double-screw extruder, carrying out calendaring molding, and carrying out traction cooling to obtain the waterproof roll. The preparation method has the advantages of simple process, convenient operation and high production efficiency, and is suitable for large-scale industrial production.
Detailed Description
The present invention will be further described with reference to the following embodiments.
In a specific embodiment, the organic montmorillonite is prepared by the following method: according to the mass ratio of sodium-based montmorillonite to hexadecyl trimethyl ammonium chloride of 1:0.4, adding sodium-based montmorillonite into a hexadecyl trimethyl ammonium chloride aqueous solution with the mass concentration of 4%, heating to 75 ℃, stirring for reacting for 3.5h, then carrying out solid-liquid separation, washing, and carrying out vacuum drying at 90 ℃ to obtain the organic montmorillonite. Wherein the cation exchange capacity of the sodium montmorillonite is 100mmol/100g, and the particle size is 16-22 μm.
In a specific embodiment, the barrel temperature of the twin-screw extruder is controlled to be 140-; the rotating speed of a screw of the main machine is controlled at 30rpm, and the load of the main machine is controlled at 75%; the working pressure of the vacuum pump is less than or equal to-0.08 MPa. The roller temperature of the three-roller calender is controlled at 50-60 ℃.
The raw materials and the parts by weight of the aging-resistant modified polyvinyl chloride waterproof rolls of examples 1 to 3 are shown in table 1.
TABLE 1 raw material list of aging-resistant modified polyvinyl chloride waterproofing rolls of examples 1-3
The preparation method of the anti-aging modified polyvinyl chloride waterproof roll material in the embodiment 1 comprises the following steps:
1) adding the magnalium hydrotalcite, the ground calcium carbonate, the titanium pigment and the silane coupling agent with the formula ratio into an ethanol-water mixed solution (the mass ratio of absolute ethanol to water is 9:1) for wet grinding, wherein the mass ratio of grinding balls, materials and liquid in the wet grinding process is 4:2:1, and drying to obtain a modified filler;
2) adding the modified filler obtained in the step 1), PVC resin powder and other raw materials in a formula ratio into a high-speed mixer, and heating to 110 ℃ to mix for 20min to obtain a mixture;
3) and (3) plasticizing and extruding the mixture obtained in the step 2) in a double-screw extruder, carrying out calendaring molding by a three-roll calender, and cooling and drawing to obtain the anti-aging modified polyvinyl chloride waterproof roll.
The preparation method of the aging-resistant modified polyvinyl chloride waterproof roll material of the embodiment 2 comprises the following steps:
1) adding the magnalium hydrotalcite, the ground calcium carbonate, the titanium pigment and the silane coupling agent with the formula ratio into an ethanol-water mixed solution (the mass ratio of absolute ethanol to water is 9:1) for wet grinding, wherein the mass ratio of grinding balls, materials and liquid in the wet grinding process is 4:2:1, and drying to obtain a modified filler;
2) adding the modified filler obtained in the step 1), PVC resin powder and other raw materials in a formula amount into a high-speed mixer, heating to 100 ℃, and mixing for 30min to obtain a mixture;
3) and (3) plasticizing and extruding the mixture obtained in the step 2) in a double-screw extruder, carrying out calendaring molding by a three-roll calender, and cooling and drawing to obtain the anti-aging modified polyvinyl chloride waterproof roll.
The preparation method of the aging-resistant modified polyvinyl chloride waterproof roll material of the embodiment 3 comprises the following steps:
1) adding the magnalium hydrotalcite, the ground calcium carbonate, the titanium pigment and the silane coupling agent with the formula ratio into an ethanol-water mixed solution (the mass ratio of absolute ethanol to water is 9:1) for wet grinding, wherein the mass ratio of grinding balls, materials and liquid in the wet grinding process is 4:2:1, and drying to obtain a modified filler;
2) adding the modified filler obtained in the step 1), PVC resin powder and other raw materials in a formula amount into a high-speed mixer, heating to 105 ℃, and mixing for 25min to obtain a mixture;
3) and (3) plasticizing and extruding the mixture obtained in the step 2) in a double-screw extruder, carrying out calendaring molding by a three-roll calender, and cooling and drawing to obtain the anti-aging modified polyvinyl chloride waterproof roll.
The performance of the aging-resistant modified polyvinyl chloride waterproof roll obtained in the embodiment 1-3 is detected, and the detection method and indexes refer to GB12952 polyvinyl chloride (PVC) waterproof roll. The results are shown in Table 2.
TABLE 2 results of testing the properties of the aging-resistant modified polyvinyl chloride waterproofing membranes obtained in examples 1 to 3
Note: the low temperature bendability correspondence shows the temperature at which the test sample develops a crack phenomenon.
As can be seen from Table 2, the aging-resistant modified polyvinyl chloride waterproof roll with the specification and thickness of 1.5mm obtained in examples 1-3 has the advantages of tensile strength not lower than 16.53MPa, elongation at break not lower than 349% and good mechanical properties; the heat treatment size change rate is not more than 1.0 percent, the heat resistance is good, and the size is stable; in a low-temperature bending experiment, no crack exists at the temperature of minus 25 ℃, the test sample has a crack phenomenon only when the temperature is below minus 35 ℃, and the test sample has good low-temperature flexibility; the water impermeability (0.3MPa, 2H impermeability) and the impact resistance (0.5 kg.m, water impermeability) are qualified, and the waterproof performance and the impact resistance are good; the right-angle tear strength reaches more than 66N/mm, and the tear strength is high. After the sample is subjected to thermal aging at 80 ℃ for 672h, the appearance of the test sample has no bubbles, cracks, delamination, adhesion and holes, the tensile strength is more than 15.62MPa, and the retention rate of the tensile strength reaches 95.15%; the elongation at break is still over 313 percent, and the retention rate of the elongation at break reaches 90.58 percent; in a low-temperature bending experiment after thermal aging, no crack exists at the temperature of minus 25 ℃, a test sample has a crack phenomenon below minus 31 ℃, and the heat-resistant aging performance is good and the property is stable. After the artificial climate accelerated aging, the appearance of a test sample has no bubbles, cracks, layering, bonding and holes, the tensile strength is more than 15.49MPa, and the retention rate of the tensile strength is close to 94%; the elongation at break is still above 314%, and the retention rate of the elongation at break is about 90%; in a low-temperature bending experiment after artificial climate accelerated aging, no crack exists at the temperature of minus 25 ℃, the test sample has a crack phenomenon below minus 30 ℃, the weather resistance is good, and the service life is long. The detection results of the indexes far exceed the index requirements specified by GB12952 polyvinyl chloride (PVC) waterproof coiled material on a homogeneous coiled material (code number H).
The experimental result shows that the anti-aging modified polyvinyl chloride waterproof coiled material has good mechanical property and high mechanical strength; the heat resistance is good, and the size is stable; the low-temperature flexible waterproof coating has good low-temperature flexibility, waterproof performance and impact resistance; high tearing strength, and is firm and durable. After the heat aging and the artificial climate accelerated aging, the appearance is not obviously changed, the tensile strength and the elongation at break are reduced, the temperature of cracks in a low-temperature bending test is increased, but the influence on each index is small, the index is still far beyond the index requirement specified by GB12952 polyvinyl chloride (PVC) waterproof coiled material on a homogeneous coiled material (code number H), the tensile strength retention rate and the elongation at break retention rate are high, the heat aging resistance and the weather aging resistance are good, the applicability is wider, and the service life is long.
Claims (9)
1. The utility model provides an ageing-resistant modified polyvinyl chloride waterproofing membrane which characterized in that: the material is mainly prepared from the following raw materials in parts by weight: 100 parts of PVC resin, 20-30 parts of dioctyl terephthalate, 10-15 parts of tributyl citrate, 10-15 parts of trioctyl trimellitate, 13-15 parts of nitrile rubber, 6-8 parts of EVA (ethylene vinyl acetate) elastomer, 8-10 parts of magnesium aluminum hydrotalcite, 8-10 parts of organic montmorillonite, 8-10 parts of ground calcium carbonate, 5-6 parts of titanium dioxide, 0.4-0.5 part of silane coupling agent, 5-6 parts of calcium-zinc composite stabilizer, 1.5-2 parts of light stabilizer, 0.5-1.5 parts of lubricant, 0.5-1.5 parts of antioxidant and 0-5 parts of colorant.
2. The aging-resistant modified polyvinyl chloride waterproof roll material as claimed in claim 1, wherein: the polymerization degree of the PVC resin is 1000-1500.
3. The aging-resistant modified polyvinyl chloride waterproof roll material as claimed in claim 1, wherein: the total mass of the dioctyl terephthalate, the tributyl citrate and the trioctyl trimellitate is not less than 50% of the mass of the PVC resin; the total mass of the nitrile rubber and the EVA elastomer is not less than 20% of the mass of the PVC resin.
4. The aging-resistant modified polyvinyl chloride waterproof roll material as claimed in claim 1, wherein: the silane coupling agent is KH-550.
5. The aging-resistant modified polyvinyl chloride waterproof roll material as claimed in claim 1, wherein: the light stabilizer comprises a hindered amine light stabilizer and an ultraviolet absorber; the lubricant is oxidized polyethylene wax; the antioxidant comprises an antioxidant 1010 and an antioxidant 1076.
6. A method for preparing the aging-resistant modified polyvinyl chloride waterproof roll material as claimed in any one of claims 1 to 5, wherein: the method comprises the following steps:
1) adding the magnalium hydrotalcite, the heavy calcium carbonate, the titanium pigment and the silane coupling agent according to the formula ratio into ethanol-water mixed solution for wet grinding, wherein the mass ratio of grinding balls to materials to liquid in the wet grinding process is 4:1.8-2.2:0.8-1.2, and drying after wet grinding to obtain modified filler;
2) adding the modified filler obtained in the step 1), PVC resin powder and other raw materials in a formula ratio into a high-speed mixer, heating to 100-110 ℃, and mixing for 20-30min to obtain a mixture;
3) and (3) plasticizing and extruding the mixture obtained in the step 2) in a double-screw extruder, carrying out calendaring molding by a three-roll calender, and cooling and drawing to obtain the material.
7. The preparation method of the aging-resistant modified polyvinyl chloride waterproof roll material according to claim 6, wherein the preparation method comprises the following steps: the ethanol-water mixed solution in the step 1) is prepared by mixing absolute ethanol and water according to the mass ratio of 7-9: 1-3.
8. The preparation method of the aging-resistant modified polyvinyl chloride waterproof roll material according to claim 6, wherein the preparation method comprises the following steps: in the step 3), the barrel temperature of the double-screw extruder is 140-170 ℃, and the die head temperature is 165-175 ℃.
9. The preparation method of the aging-resistant modified polyvinyl chloride waterproof roll material according to claim 6, wherein the preparation method comprises the following steps: in the step 3), the roller temperature of the three-roller calender is 50-70 ℃.
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| CN112759863A (en) * | 2020-12-31 | 2021-05-07 | 浙江威思康塑胶有限公司 | High-temperature-resistant and verdigris-resistant PVC (polyvinyl chloride) insulating material and preparation method thereof |
| CN114479307A (en) * | 2020-10-27 | 2022-05-13 | 中国石油化工股份有限公司 | High-polymerization-degree polyvinyl chloride composition for waterproof roll isolating membrane |
| CN116041872A (en) * | 2021-10-28 | 2023-05-02 | 中国石油化工股份有限公司 | Migration-precipitation-resistant and aging-resistant PVC cable material composition |
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