Preparation method for rubber seal for automobile oil seal
A technology for rubber seals and oil seals, applied in chemical instruments and methods, and other chemical processes, can solve the problems of insufficient sealing effect of nitrile rubber seals, and achieve the effects of improved elasticity, high compressive strength, and stable performance
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Embodiment 1
[0018] A method for preparing a rubber seal for automobile oil seals, comprising the steps of:
[0019] S1. Stir 20kg of humic acid and 120kg of sodium hydroxide solution with a concentration of 0.5mol / L for 4h, the stirring temperature is 70°C, and the adjustment system is neutral. Add 45kg of nano titanium dioxide and 1kg of polyethylene glycol 400 and stir for 20min. at 2000r / min, add 2kg sodium carboxymethylcellulose and 2kg epichlorohydrin and stir for 80min at a stirring temperature of 90°C, filter, wash, and dry to obtain a prefabricated material;
[0020] S2. Mix 160kg of nitrile rubber, 60kg of polyurethane rubber, 2kg of epoxy soybean oil, 1kg of acetyl tributyl citrate, and 4kg of dioctyl terephthalate for 1min. The mixing temperature is 162°C, and the temperature is lowered to 110°C to continue Mixed for 60s to obtain the mixed material;
[0021] S3, add 50kg prefabricated material, 20kg heavy calcium carbonate, 30kg nanometer mica powder, 0.4kg stearic acid, 2kg ...
Embodiment 2
[0023] A method for preparing a rubber seal for automobile oil seals, comprising the steps of:
[0024] S1. Stir 30kg of humic acid and 80kg of sodium hydroxide solution with a concentration of 0.8mol / L for 2h, the stirring temperature is 90°C, and the adjustment system is neutral. Add 25kg of nano titanium dioxide and 3kg of polyethylene glycol 400 and stir for 10min. at 2600r / min, add 1kg sodium carboxymethylcellulose and 4kg epichlorohydrin and stir for 40min at a stirring temperature of 96°C, filter, wash, and dry to obtain a prefabricated material;
[0025] S2. Mix 120kg of nitrile rubber, 100kg of polyurethane rubber, 1kg of epoxy soybean oil, 2kg of acetyl tributyl citrate, and 2kg of dioctyl terephthalate for 4 minutes. The mixing temperature is 145°C, and the temperature is lowered to 118°C to continue Mixed for 30s to obtain the mixed material;
[0026] S3, add 30kg prefabricated material, 30kg heavy calcium carbonate, 20kg nanometer mica powder, 1kg stearic acid, 1...
Embodiment 3
[0028] A method for preparing a rubber seal for automobile oil seals, comprising the steps of:
[0029] S1. 22kg humic acid and 110kg concentration of 0.6mol / L sodium hydroxide solution were stirred for 3.5h, the stirring temperature was 75°C, the adjustment system was neutral, 40kg nanometer titanium dioxide and 1.5kg polyethylene glycol 400 were added and stirred for 18min, The stirring speed is 2200r / min, add 1.8kg sodium carboxymethylcellulose and 2.5kg epichlorohydrin and stir for 70min, the stirring temperature is 92°C, filter, wash and dry to obtain the prefabricated material;
[0030] S2, 150kg nitrile rubber, 70kg polyurethane rubber, 1.8kg epoxy soybean oil, 1.3kg acetyl tributyl citrate, 3.5kg dioctyl terephthalate were mixed for 2min, the mixing temperature was 160°C, and the temperature was lowered to Continue mixing at 112°C for 50s to obtain a mixed material;
[0031] S3, add 45kg prefabricated material, 22kg heavy calcium carbonate, 27kg nano-mica powder, 0.6k...
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