CN113004648A - Composite water gate rubber sealing element and preparation method thereof - Google Patents
Composite water gate rubber sealing element and preparation method thereof Download PDFInfo
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Abstract
The invention provides a composite water gate rubber sealing element and a preparation method thereof, and belongs to the technical field of rubber materials. The raw materials are as follows according to the mass portion: 100 parts of ethylene propylene diene monomer 4045, 0.1-0.5 part of maleic anhydride, 0.01-0.05 part of benzoyl peroxide, 40-55 parts of carbon black, 1-3 parts of nano zinc oxide, 2-3 parts of nano silicon dioxide, 3-5 parts of epoxidized soybean oil, 0.5-1.5 parts of calcium carbonate, 0.05-0.35 part of titanate coupling agent, 0.5-0.8 part of tributyl citrate, 0.2-0.6 part of diethylene glycol dibenzoate, 1-2 parts of calcium adipate, 1-2 parts of neodymium stearate, 0.2-0.8 part of distearyl thiodipropionate, 1-2 parts of 2-hydroxy-4-n-octyloxy benzophenone and 2-4 parts of sulfur. The product prepared by the invention has obviously improved tensile strength and tearing strength and excellent mechanical property.
Description
Technical Field
The invention belongs to the technical field of rubber materials, and particularly relates to a composite water gate rubber sealing element and a preparation method thereof.
Background
Ethylene Propylene Diene monomer, which is a copolymer of ethylene, Propylene and a small amount of non-conjugated Diene, is one of ethylene Propylene rubbers, and its main chain is composed of chemically stable saturated hydrocarbons, and only contains unsaturated double bonds in the side chains, so that it has excellent aging resistance such as ozone resistance, heat resistance, weather resistance, etc., and can be widely used in the fields of automobile parts, waterproof materials for buildings, wire and cable sheaths, heat-resistant rubber tubes, tapes, automobile seals, etc. The ethylene propylene diene monomer rubber has a main molecular chain composed of stable saturated hydrocarbon and only a small amount of unsaturated double bonds on a molecular side chain, so that the ethylene propylene diene monomer rubber has excellent ozone resistance, aging resistance, outstanding corrosion resistance and electric insulation performance, but the ethylene propylene diene monomer rubber has low vulcanization speed, low mechanical property and poor self-adhesiveness and mutual adhesiveness because the ethylene propylene diene monomer rubber does not contain polar side groups and has low double bond content.
The sluice sealing member is a key accessory for water stopping of various steel gates in hydropower engineering, and factors such as the quality of the sluice sealing member, the field installation process and the like directly influence the water stopping effect of the hydraulic gate so as to influence the safe operation of a hydraulic building. The mechanical property of the existing sluice sealing element prepared based on the ethylene propylene diene monomer rubber is still to be improved.
Disclosure of Invention
The technical problem to be solved is as follows: aiming at the technical problems, the invention provides the composite water gate rubber sealing element and the preparation method thereof, and the prepared product has good mechanical property.
The technical scheme is as follows: a composite water gate rubber sealing element comprises the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer 4045, 0.1-0.5 part of maleic anhydride, 0.01-0.05 part of benzoyl peroxide, 40-55 parts of carbon black, 1-3 parts of nano zinc oxide, 2-3 parts of nano silicon dioxide, 3-5 parts of epoxidized soybean oil, 0.5-1.5 parts of calcium carbonate, 0.05-0.35 part of titanate coupling agent, 0.5-0.8 part of tributyl citrate, 0.2-0.6 part of diethylene glycol dibenzoate, 1-2 parts of calcium adipate, 1-2 parts of neodymium stearate, 0.2-0.8 part of distearyl thiodipropionate, 1-2 parts of 2-hydroxy-4-n-octyloxy benzophenone and 2-4 parts of sulfur.
Preferably, the raw materials are as follows according to the mass portion: 100 parts of ethylene propylene diene monomer 4045, 0.1 part of maleic anhydride, 0.01 part of benzoyl peroxide, 40 parts of carbon black, 1 part of nano zinc oxide, 2 parts of nano silicon dioxide, 3 parts of epoxidized soybean oil, 0.5 part of calcium carbonate, 0.05 part of titanate coupling agent, 0.5 part of tributyl citrate, 0.2 part of diethylene glycol dibenzoate, 1 part of calcium adipate, 1 part of neodymium stearate, 0.2 part of distearyl thiodipropionate, 1 part of 2-hydroxy-4-n-octyloxy benzophenone and 2 parts of sulfur.
Preferably, the raw materials are as follows according to the mass portion: 100 parts of ethylene propylene diene monomer 4045, 0.5 part of maleic anhydride, 0.05 part of benzoyl peroxide, 55 parts of carbon black, 3 parts of nano zinc oxide, 3 parts of nano silicon dioxide, 5 parts of epoxidized soybean oil, 1.5 parts of calcium carbonate, 0.35 part of titanate coupling agent, 0.8 part of tributyl citrate, 0.6 part of diethylene glycol dibenzoate, 2 parts of calcium adipate, 2 parts of neodymium stearate, 0.8 part of distearyl thiodipropionate, 2 parts of 2-hydroxy-4-n-octyloxy benzophenone and 4 parts of sulfur.
Preferably, the raw materials are as follows according to the mass portion: 100 parts of ethylene propylene diene monomer 4045, 0.4 part of maleic anhydride, 0.03 part of benzoyl peroxide, 48 parts of carbon black, 2 parts of nano zinc oxide, 2 parts of nano silicon dioxide, 5 parts of epoxidized soybean oil, 1 part of calcium carbonate, 0.1 part of titanate coupling agent, 0.6 part of tributyl citrate, 0.4 part of diethylene glycol dibenzoate, 1.5 parts of calcium adipate, 1 part of neodymium stearate, 0.5 part of distearyl thiodipropionate, 1 part of 2-hydroxy-4-n-octyloxy benzophenone and 3.5 parts of sulfur.
The preparation method of the composite water gate rubber sealing element comprises the following steps:
weighing 4045 parts of ethylene propylene diene monomer, maleic anhydride, benzoyl peroxide, carbon black, nano zinc oxide, nano silicon dioxide, epoxy soybean oil, calcium carbonate, titanate coupling agent, tributyl citrate, diethylene glycol dibenzoate, calcium adipate, neodymium stearate, distearyl thiodipropionate, 2-hydroxy-4-n-octyloxy benzophenone and sulfur according to the mass part ratio;
step two, putting the ethylene propylene diene monomer 4045, maleic anhydride and benzoyl peroxide into a torque rheometer, and mixing for 5-10 min at 105-108 ℃ and 50-55 r/min;
and step three, mixing nano zinc oxide, nano silicon dioxide, epoxidized soybean oil, calcium carbonate and a titanate coupling agent, adding carbon black, uniformly mixing, adding the ethylene propylene diene monomer 4045 mixture treated in the step one, putting the mixture into a mixing mill at 110-120 ℃, mixing for 3-5 min to obtain mixed rubber, adding tributyl citrate, diethylene glycol dibenzoate, calcium adipate, neodymium stearate, distearyl thiodipropionate, 2-hydroxy-4-n-octoxy benzophenone and sulfur into the mixed rubber, continuously mixing for 2-4 min to obtain rubber material, passing the rubber material through an extruder for 4-6 times, carrying out extrusion forming, standing for one day, and vulcanizing and shaping for 15-20 min on a vulcanizing machine at 160-170 ℃.
Preferably, in the second step, the ethylene propylene diene monomer 4045, the maleic anhydride and the benzoyl peroxide are put into a torque rheometer and mixed for 8min at the temperature of 106 ℃ and at the speed of 55 r/min.
Preferably, in the third step, the nano zinc oxide, the nano silicon dioxide, the epoxidized soybean oil, the calcium carbonate and the titanate coupling agent are mixed, then the carbon black is added and mixed uniformly, finally the ethylene propylene diene monomer 4045 mixture processed in the first step is added and mixed in a mixer at 115 ℃ for 4min to obtain mixed rubber, then the tributyl citrate, the diethylene glycol dibenzoate, the calcium adipate, the neodymium stearate, the distearyl thiodipropionate, the 2-hydroxy-4-n-octoxy benzophenone and the sulfur are added and mixed continuously for 3min to obtain rubber material, the rubber material is passed through 4-6 times and then is fed into an extruder for extrusion forming, and after standing for one day, the rubber material is vulcanized and shaped for 15min on a vulcanizer at 164 ℃.
Has the advantages that: according to the invention, ethylene propylene diene monomer is pretreated by maleic anhydride and benzoyl peroxide, then under the synergistic effect of nano zinc oxide, nano silicon dioxide and epoxidized soybean oil, calcium carbonate, titanate coupling agent, carbon black, tributyl citrate, diethylene glycol dibenzoate, calcium adipate, neodymium stearate, distearyl thiodipropionate, 2-hydroxy-4-n-octyloxy benzophenone, sulfur and other auxiliaries are added, and the water gate rubber sealing element with obviously improved tensile strength and tear strength is finally obtained after mixing and vulcanization.
Detailed Description
The invention is further described with reference to specific examples.
Example 1
A composite water gate rubber sealing element comprises the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer 4045, 0.4 part of maleic anhydride, 0.03 part of benzoyl peroxide, 48 parts of carbon black, 2 parts of nano zinc oxide, 2 parts of nano silicon dioxide, 5 parts of epoxidized soybean oil, 1 part of calcium carbonate, 0.1 part of titanate coupling agent, 0.6 part of tributyl citrate, 0.4 part of diethylene glycol dibenzoate, 1.5 parts of calcium adipate, 1 part of neodymium stearate, 0.5 part of distearyl thiodipropionate, 1 part of 2-hydroxy-4-n-octyloxy benzophenone and 3.5 parts of sulfur.
The preparation method of the composite water gate rubber sealing element comprises the following steps:
weighing 4045 parts of ethylene propylene diene monomer, maleic anhydride, benzoyl peroxide, carbon black, nano zinc oxide, nano silicon dioxide, epoxy soybean oil, calcium carbonate, titanate coupling agent, tributyl citrate, diethylene glycol dibenzoate, calcium adipate, neodymium stearate, distearyl thiodipropionate, 2-hydroxy-4-n-octyloxy benzophenone and sulfur according to the mass part ratio;
step two, putting the ethylene propylene diene monomer 4045, maleic anhydride and benzoyl peroxide into a torque rheometer, and mixing for 8min at the temperature of 106 ℃ and at the speed of 55 r/min;
and step three, mixing nano zinc oxide, nano silicon dioxide, epoxidized soybean oil, calcium carbonate and a titanate coupling agent, adding carbon black, uniformly mixing, finally adding the ethylene propylene diene monomer 4045 mixture processed in the step one, placing the mixture into a 115 ℃ mixing roll, mixing for 4min to obtain mixed rubber, then adding tributyl citrate, diethylene glycol dibenzoate, calcium adipate, neodymium stearate, distearyl thiodipropionate, 2-hydroxy-4-n-octyloxy benzophenone and sulfur into the mixed rubber, continuously mixing for 3min to obtain rubber material, carrying out thin-pass on the rubber material for 4-6 times, sending the rubber material into an extruder, carrying out extrusion forming, standing for one day, and carrying out vulcanization forming on a 164 ℃ vulcanizing machine for 15 min.
Example 2
A composite water gate rubber sealing element comprises the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer 4045, 0.1 part of maleic anhydride, 0.01 part of benzoyl peroxide, 40 parts of carbon black, 1 part of nano zinc oxide, 2 parts of nano silicon dioxide, 3 parts of epoxidized soybean oil, 0.5 part of calcium carbonate, 0.05 part of titanate coupling agent, 0.5 part of tributyl citrate, 0.2 part of diethylene glycol dibenzoate, 1 part of calcium adipate, 1 part of neodymium stearate, 0.2 part of distearyl thiodipropionate, 1 part of 2-hydroxy-4-n-octyloxy benzophenone and 2 parts of sulfur.
The preparation method of the composite water gate rubber sealing element comprises the following steps:
weighing 4045 parts of ethylene propylene diene monomer, maleic anhydride, benzoyl peroxide, carbon black, nano zinc oxide, nano silicon dioxide, epoxy soybean oil, calcium carbonate, titanate coupling agent, tributyl citrate, diethylene glycol dibenzoate, calcium adipate, neodymium stearate, distearyl thiodipropionate, 2-hydroxy-4-n-octyloxy benzophenone and sulfur according to the mass part ratio;
step two, putting the ethylene propylene diene monomer 4045, maleic anhydride and benzoyl peroxide into a torque rheometer and mixing for 10min at the temperature of 105 ℃ and at the speed of 55 r/min;
and step three, mixing nano zinc oxide, nano silicon dioxide, epoxidized soybean oil, calcium carbonate and titanate coupling agent, adding carbon black, uniformly mixing, finally adding the ethylene propylene diene monomer 4045 mixture processed in the step one, putting the mixture into a mixing mill at 110 ℃, mixing for 5min to obtain mixed rubber, then adding tributyl citrate, diethylene glycol dibenzoate, calcium adipate, neodymium stearate, distearyl thiodipropionate, 2-hydroxy-4-n-octoxy benzophenone and sulfur into the mixed rubber, continuously mixing for 4min to obtain rubber material, carrying out thin-pass on the rubber material for 6 times, then sending the rubber material into an extruder for extrusion forming, standing for one day, and carrying out vulcanization forming on a vulcanizing machine at 160 ℃ for 20 min.
Example 3
A composite water gate rubber sealing element comprises the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer 4045, 0.5 part of maleic anhydride, 0.05 part of benzoyl peroxide, 55 parts of carbon black, 3 parts of nano zinc oxide, 3 parts of nano silicon dioxide, 5 parts of epoxidized soybean oil, 1.5 parts of calcium carbonate, 0.35 part of titanate coupling agent, 0.8 part of tributyl citrate, 0.6 part of diethylene glycol dibenzoate, 2 parts of calcium adipate, 2 parts of neodymium stearate, 0.8 part of distearyl thiodipropionate, 2 parts of 2-hydroxy-4-n-octyloxy benzophenone and 4 parts of sulfur.
The preparation method of the composite water gate rubber sealing element comprises the following steps:
weighing 4045 parts of ethylene propylene diene monomer, maleic anhydride, benzoyl peroxide, carbon black, nano zinc oxide, nano silicon dioxide, epoxy soybean oil, calcium carbonate, titanate coupling agent, tributyl citrate, diethylene glycol dibenzoate, calcium adipate, neodymium stearate, distearyl thiodipropionate, 2-hydroxy-4-n-octyloxy benzophenone and sulfur according to the mass part ratio;
step two, putting the ethylene propylene diene monomer 4045, maleic anhydride and benzoyl peroxide into a torque rheometer and mixing for 10min at the temperature of 108 ℃ and at the speed of 55 r/min;
and step three, mixing nano zinc oxide, nano silicon dioxide, epoxidized soybean oil, calcium carbonate and titanate coupling agent, adding carbon black, uniformly mixing, finally adding the ethylene propylene diene monomer 4045 mixture processed in the step one, placing the mixture into a 120 ℃ mixing roll, mixing for 3min to obtain mixed rubber, then adding tributyl citrate, diethylene glycol dibenzoate, calcium adipate, neodymium stearate, distearyl thiodipropionate, 2-hydroxy-4-n-octyloxy benzophenone and sulfur into the mixed rubber, continuously mixing for 2min to obtain rubber material, carrying out thin-pass on the rubber material for 4 times, sending the rubber material into an extruder, carrying out extrusion forming, standing for one day, and carrying out vulcanization forming on a 170 ℃ vulcanizing machine for 15 min.
Comparative example 1
The difference from example 1 is that no nano zinc oxide, nano silica and epoxidized soybean oil are added. The preparation process comprises the following steps: weighing 4045 parts of ethylene propylene diene monomer, maleic anhydride, benzoyl peroxide, carbon black, calcium carbonate, a titanate coupling agent, tributyl citrate, diethylene glycol dibenzoate, calcium adipate, neodymium stearate, distearyl thiodipropionate, 2-hydroxy-4-n-octoxy benzophenone and sulfur according to the mass part ratio;
step two, putting the ethylene propylene diene monomer 4045, maleic anhydride and benzoyl peroxide into a torque rheometer, and mixing for 8min at the temperature of 106 ℃ and at the speed of 55 r/min;
and step three, mixing calcium carbonate and titanate coupling agent, adding carbon black, mixing uniformly, adding the ethylene propylene diene monomer 4045 mixture processed in the step one, mixing in a mixer at 115 ℃ for 4min to obtain mixed rubber, adding tributyl citrate, diethylene glycol dibenzoate, calcium adipate, neodymium stearate, distearyl thiodipropionate, 2-hydroxy-4-n-octyloxy benzophenone and sulfur into the mixed rubber, mixing for 3min continuously to obtain rubber material, passing the rubber material through an extruder for 4-6 times to perform extrusion forming, standing for one day, and performing vulcanization forming on a vulcanizer at 164 ℃ for 15 min.
Comparative example 2
The difference from example 1 is that maleic anhydride and benzoyl peroxide are not added. The preparation process comprises the following steps:
weighing 4045 parts of ethylene propylene diene monomer, carbon black, nano zinc oxide, nano silicon dioxide, epoxidized soybean oil, calcium carbonate, a titanate coupling agent, tributyl citrate, diethylene glycol dibenzoate, calcium adipate, neodymium stearate, distearyl thiodipropionate, 2-hydroxy-4-n-octyloxy benzophenone and sulfur according to the mass part ratio;
step two, putting the ethylene propylene diene monomer 4045 into a torque rheometer and mixing for 8min at the temperature of 106 ℃ and at the speed of 55 r/min;
and step three, mixing nano zinc oxide, nano silicon dioxide, epoxidized soybean oil, calcium carbonate and a titanate coupling agent, adding carbon black, uniformly mixing, finally adding the ethylene propylene diene monomer 4045 mixture processed in the step one, placing the mixture into a 115 ℃ mixing roll, mixing for 4min to obtain mixed rubber, then adding tributyl citrate, diethylene glycol dibenzoate, calcium adipate, neodymium stearate, distearyl thiodipropionate, 2-hydroxy-4-n-octyloxy benzophenone and sulfur into the mixed rubber, continuously mixing for 3min to obtain rubber material, carrying out thin-pass on the rubber material for 4-6 times, sending the rubber material into an extruder, carrying out extrusion forming, standing for one day, and carrying out vulcanization forming on a 164 ℃ vulcanizing machine for 15 min.
The products prepared in examples 1 to 3 and comparative examples 1 and 2 were subjected to performance tests, and the results were as follows:
as can be seen from the table, in examples 1 to 3, the product performance obtained in example 1 is the best, and the product performance obtained in comparative example 1 and comparative example 2 is worse than that obtained in example 1.
Claims (7)
1. The composite water gate rubber sealing element is characterized by comprising the following raw materials in parts by mass: 100 parts of ethylene propylene diene monomer 4045, 0.1-0.5 part of maleic anhydride, 0.01-0.05 part of benzoyl peroxide, 40-55 parts of carbon black, 1-3 parts of nano zinc oxide, 2-3 parts of nano silicon dioxide, 3-5 parts of epoxidized soybean oil, 0.5-1.5 parts of calcium carbonate, 0.05-0.35 part of titanate coupling agent, 0.5-0.8 part of tributyl citrate, 0.2-0.6 part of diethylene glycol dibenzoate, 1-2 parts of calcium adipate, 1-2 parts of neodymium stearate, 0.2-0.8 part of distearyl thiodipropionate, 1-2 parts of 2-hydroxy-4-n-octyloxy benzophenone and 2-4 parts of sulfur.
2. The composite water gate rubber sealing element of claim 1, which is characterized by comprising the following raw materials in parts by mass: 100 parts of ethylene propylene diene monomer 4045, 0.1 part of maleic anhydride, 0.01 part of benzoyl peroxide, 40 parts of carbon black, 1 part of nano zinc oxide, 2 parts of nano silicon dioxide, 3 parts of epoxidized soybean oil, 0.5 part of calcium carbonate, 0.05 part of titanate coupling agent, 0.5 part of tributyl citrate, 0.2 part of diethylene glycol dibenzoate, 1 part of calcium adipate, 1 part of neodymium stearate, 0.2 part of distearyl thiodipropionate, 1 part of 2-hydroxy-4-n-octyloxy benzophenone and 2 parts of sulfur.
3. The composite water gate rubber sealing element of claim 1, which is characterized by comprising the following raw materials in parts by mass: 100 parts of ethylene propylene diene monomer 4045, 0.5 part of maleic anhydride, 0.05 part of benzoyl peroxide, 55 parts of carbon black, 3 parts of nano zinc oxide, 3 parts of nano silicon dioxide, 5 parts of epoxidized soybean oil, 1.5 parts of calcium carbonate, 0.35 part of titanate coupling agent, 0.8 part of tributyl citrate, 0.6 part of diethylene glycol dibenzoate, 2 parts of calcium adipate, 2 parts of neodymium stearate, 0.8 part of distearyl thiodipropionate, 2 parts of 2-hydroxy-4-n-octyloxy benzophenone and 4 parts of sulfur.
4. The composite water gate rubber sealing element of claim 1, which is characterized by comprising the following raw materials in parts by mass: 100 parts of ethylene propylene diene monomer 4045, 0.4 part of maleic anhydride, 0.03 part of benzoyl peroxide, 48 parts of carbon black, 2 parts of nano zinc oxide, 2 parts of nano silicon dioxide, 5 parts of epoxidized soybean oil, 1 part of calcium carbonate, 0.1 part of titanate coupling agent, 0.6 part of tributyl citrate, 0.4 part of diethylene glycol dibenzoate, 1.5 parts of calcium adipate, 1 part of neodymium stearate, 0.5 part of distearyl thiodipropionate, 1 part of 2-hydroxy-4-n-octyloxy benzophenone and 3.5 parts of sulfur.
5. The preparation method of the composite water gate rubber sealing element based on claim 1 is characterized by comprising the following steps:
weighing 4045 parts of ethylene propylene diene monomer, maleic anhydride, benzoyl peroxide, carbon black, nano zinc oxide, nano silicon dioxide, epoxy soybean oil, calcium carbonate, titanate coupling agent, tributyl citrate, diethylene glycol dibenzoate, calcium adipate, neodymium stearate, distearyl thiodipropionate, 2-hydroxy-4-n-octyloxy benzophenone and sulfur according to the mass part ratio;
step two, putting the ethylene propylene diene monomer 4045, maleic anhydride and benzoyl peroxide into a torque rheometer, and mixing for 5-10 min at 105-108 ℃ and 50-55 r/min;
and step three, mixing nano zinc oxide, nano silicon dioxide, epoxidized soybean oil, calcium carbonate and a titanate coupling agent, adding carbon black, uniformly mixing, adding the ethylene propylene diene monomer 4045 mixture treated in the step one, putting the mixture into a mixing mill at 110-120 ℃, mixing for 3-5 min to obtain mixed rubber, adding tributyl citrate, diethylene glycol dibenzoate, calcium adipate, neodymium stearate, distearyl thiodipropionate, 2-hydroxy-4-n-octoxy benzophenone and sulfur into the mixed rubber, continuously mixing for 2-4 min to obtain rubber material, passing the rubber material through an extruder for 4-6 times, carrying out extrusion forming, standing for one day, and vulcanizing and shaping for 15-20 min on a vulcanizing machine at 160-170 ℃.
6. The method for preparing a composite water gate rubber sealing element according to claim 5, wherein in the second step, the ethylene propylene diene monomer 4045, the maleic anhydride and the benzoyl peroxide are put into a torque rheometer and mixed for 8min at 106 ℃ and 55 r/min.
7. The preparation method of the composite water gate rubber sealing element according to claim 5, wherein in the third step, the nano zinc oxide, the nano silicon dioxide, the epoxidized soybean oil, the calcium carbonate and the titanate coupling agent are mixed, then the carbon black is added and mixed uniformly, finally the ethylene propylene diene monomer 4045 mixture processed in the first step is added and mixed in a 115 ℃ mixing mill for 4min to obtain a mixed rubber, then the tributyl citrate, the diethylene glycol dibenzoate, the calcium adipate, the neodymium stearate, the distearyl thiodipropionate, the 2-hydroxy-4-n-octyloxy benzophenone and the sulfur are added and mixed continuously for 3min to obtain a rubber material, the rubber material is passed through 4-6 times and then is sent into an extruder for extrusion forming, and after standing for one day, the rubber material is vulcanized and shaped on a 164 ℃ vulcanizing machine for 15 min.
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