Oil resistant rubber pipes are generally processed with nitrile rubber and neoprene as the main raw materials. In actual production, oil resistant rubber hose mainly includes inner and outer rubber layers and skeleton layers, and the performance requirements of different parts are different. As the product of recycling waste rubber resources, recycled rubber can be mixed into oil resistant rubber hose compound to effectively reduce the production cost of oil resistant rubber hose. Today, Xiaobian will share with you the reference formula of various parts of oil resistant rubber hose mixed with butyl green reclaimed rubber.
1. The reference formula of nitrile reclaimed rubber is used for the inner layer of oil resistant rubber hose
60 chloroprene rubber, 40 nitrile rubber, 20 nitrile reclaimed rubber, 4 zinc oxide, 2 stearic acid, 3 zinc oxide, 1 antioxidant a, 1.5 antioxidant D, 1 paraffin, 40 carbon black N330, 71.9 light calcium, 11.5 dibutyl phthalate, 5.7 heavy oil, 8 asphalt, 8 coumaron resin and 2.4 accelerator DM; Total: 280 copies.
Vulcanization condition: 148 ℃ × 20min； Basic indicators of vulcanizate: hardness 66 degrees, tensile strength 8.7mpa, elongation at break 485%, permanent set at break 27%.
2. Reference formula for outer layer of oil resistant rubber hose
Nitrile rubber & nbsp; 20 phr, 80 phr of neoprene, 27 phr of tire recycled rubber, 4.8 phr of zinc oxide, 3.2 phr of stearic acid, 5.4 phr of magnesium oxide, 2.1 phr of antioxidant D, 32 phr of carbon black N330, 32 phr of carbon black n774, 29.7 phr of clay, 13 phr of high-speed engine oil, 5.4 phr of dibutyl phthalate, 14 phr of coumarone resin, 0.54 phr of accelerator D, 0.32 phr of accelerator TMTD and 0.54 phr of sulfur; Total: 270 copies.
Vulcanization condition: 143 ℃ × 30min； Basic indicators of vulcanizate: hardness 60 degrees, tensile strength 8.48mpa, elongation at break 466%, permanent set at break 15%.
3. Reference formula for wiping oil resistant rubber hose
100 parts of chloroprene rubber, 24 parts of recycled rubber, 5.3 parts of zinc oxide, 2.2 parts of stearic acid, 4.3 parts of magnesium oxide, 1.6 parts of antioxidant D, 32 parts of carbon black N330, 11 parts of mixed gas carbon black, 23.5 parts of light calcium, 5.3 parts of high-speed engine oil, 11 parts of dibutyl phthalate, 16 parts of coumarone, 1.1 parts of rosin, 1.1 parts of accelerator D, 1.1 parts of accelerator TMTD and 0.5 parts of sulfur; Total: 240 copies.
Vulcanization condition: 143 ℃ × 30min； Basic indicators of vulcanizate: hardness 52 degrees, tensile strength 8.6mpa, elongation at break 513%, permanent set at break 17%.
When using recycled rubber to reduce the raw material cost of oil resistant rubber hose with nitrile rubber or chloroprene rubber as the main raw material, a certain proportion of low-cost recycled rubber products such as tire recycled rubber and rubber shoe recycled rubber can be mixed in the outer rubber and wiping rubber of rubber hose, so as to effectively reduce the raw material cost; The inner rubber of oil resistant rubber hose needs to be in direct contact with the oil medium. It is recommended to use oil resistant nitrile reclaimed rubber to effectively reduce the raw material cost while ensuring the oil resistance of rubber hose.
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