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Patent number: ZL 200910229839.1

Patent introduction: The invention discloses an acid resistant and anti-aging rubber material composition and its preparation method. The composition includes the following raw materials by weight: 100 parts of chlorinated polyethylene, 10~15 parts of lead oxide, 2~5 parts of stabilizer, 2.5~5 parts of vulcanizing agent, 1.5~3 parts of vulcanizing aid, 1~3 parts of paraffin, 10~40 parts of talc, 20~80 parts of barium sulfate, 10~50 parts of carbon black, 52 # 10~25 parts of chlorinated paraffin. Put the raw materials into the internal mixer in sequence, mix them at a temperature of 110-130 ℃ for 5-10 minutes, and then return them to the mixer for 3-5 minutes. Add the mixed intermediate material back to the internal mixer, add a vulcanizing agent, and mix them at 100-120 ℃ for 1 minute. After that, return them to the mixer for 3-5 minutes and press them into the finished product. The composition of the invention has good aging resistance and acid resistance, and is suitable for manufacturing rubber gaskets, sealing rings, etc. working under acid conditions in the chemical industry.