Brominated butyl/chlorinated butyl rubber composition and preparation method thereof
A technology of chlorinated butyl rubber and brominated butyl rubber, which is applied in the field of rubber vulcanizate preparation, can solve the problems of high price, low tensile strength of gas mask cover material, and high cost of cover material, achieving low cost, Excellent anti-virus performance and excellent heat and oxygen aging resistance
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Embodiment 1
[0034] Weigh 80g of BIIR2222 and 20g of CIIR1066 raw rubber and place them in a blast oven at a constant temperature of 40°C for 24 hours. After plasticizing on the open mill for 10 minutes, blend BIIR2222 and CIIR1066 for 5 minutes, and add 1g of anti-aging agent in turn. and 0.5g of MgO, 1g of stearic acid, 55g of carbon black N220, 1g of paraffin oil, 0.5g of DOP and 0.5g of DBP, 1g of M and 1g of DM, 5g of zinc oxide and 0.3g of sulfur After the surface of the rubber material is smooth and shiny, thin the film. Put the mixed rubber at room temperature for 24 hours, measure its positive vulcanization time at 165°C with a vulcanizer, and vulcanize according to the positive vulcanization time on a 50t plate vulcanizer to obtain vulcanized rubber. The prepared vulcanizate has a tensile strength of 18.50MPa, an elongation at break of 539%, a 300% modulus of 9.30MPa, and a tear strength of 39.45KN . m -1 , the Shore hardness is 55, the tensile permanent deformation is only 10%...
Embodiment 2
[0036] The rubber matrix in the formula of Example 2 is 100g of BIIR raw rubber. During the operation, the plasticizing time on the BIIR rubber mill is 15min. Other formulas and operating steps are the same as in Example 1. The tensile strength of the prepared vulcanized rubber is 17.24MPa , the elongation at break is 567%, the 300% elongation strength is 8.24MPa, and the tear strength reaches 38.19KN . m -1 , the Shore hardness is 55, the tensile permanent deformation is only 10%, and the brittleness temperature is -50°C. After the vulcanized rubber is aged in hot air (70°C×72h), the tensile strength is 17.91MPa, and the elongation at break is 543%. The aging coefficient is 100%, and the sustainable time of vulcanized rubber against mustard gas is greater than 3600min.
Embodiment 3
[0038]In the formula of Example 3, the rubber matrix is 100g of CIIR raw rubber. During the operation, the plasticizing time on the CIIR rubber compound mill is 15min. Other formulas and operating steps are the same as in Example 1. The tensile strength of the prepared vulcanized rubber is 17.60MPa, the elongation at break is 518%, the 300% elongation strength is 9.88MPa, and the tear strength reaches 36.63KN . m -1 , the Shore hardness is 54, the tensile permanent deformation is only 9%, and the brittle temperature is -45°C. After the vulcanized rubber is aged in hot air (70°C×72h), the tensile strength is 17.62MPa, and the elongation at break is 507%. The aging factor is 98%.
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