Shock-absorbing rubber is mainly used to prevent vibration and shock, transmit or cushion the strength of vibration or impact, and is widely used in transportation, machinery and equipment. Long-term contact with oil substances, shock-absorbing rubber requires the rubber material to have good oil resistance, and nitrile rubber is generally used as the main raw material for processing; Nitrile reclaimed rubber retains the basic performance characteristics of nitrile rubber, and can be used in combination with nitrile rubber in any proportion to produce oil-resistant and shock-absorbing rubber to reduce the cost of raw materials.
1. Nitrile rubber/nitrile reclaimed rubber is used to produce a 50-degree oil-resistant and shock-absorbing rubber vulcanization formula
60 parts of nitrile rubber, 40 parts of nitrile reclaimed rubber, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant NBC, 42 parts of carbon black N550, 10 parts of carbon black N990, 10 parts of dibutyl phthalate, 1.5 parts of coumaron resin, 1.5 parts of vulcanizing agent DTDM; Total: 182 copies.
2. Nitrile rubber/nitrile reclaimed rubber is used to produce 60-degree oil-resistant shock-absorbing rubber vulcanization formula
70 parts of nitrile rubber, 30 parts of nitrile reclaimed rubber, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant MB, 2 parts of antioxidant RD, 22 parts of carbon black N550, 45 parts of carbon black N990, 5 parts of dioctyl sebacate, 1.5 parts of accelerator DM, 0.5 parts of accelerator TMTD, 1.5 parts of sulfur; Total: 184.5 shares.
3. Nitrile rubber/nitrile reclaimed rubber is used to produce 70-degree oil-resistant and shock-absorbing rubber vulcanization formula
70 parts of nitrile rubber, 30 parts of nitrile reclaimed rubber, 5 parts of zinc oxide, 1.5 parts of stearic acid, 2 parts of antioxidant MB, 2 parts of antioxidant RD, 45 parts of carbon black N550, 45 parts of silica, 6 parts of dioctyl sebacic acid, 2.2 parts of accelerator DM, 2.2 parts of accelerator TMTD, 1.1 parts of sulfur; Total: 182 copies.
When using nitrile recycled rubber to reduce the production cost of oil-resistant and shock-absorbing rubber, the mixing ratio of nitrile rubber and nitrile reclaimed rubber can be determined according to the specific needs of shock-absorbing rubber and the physical properties of reclaimed rubber.
Zinc oxide and stearic acid as part of the vulcanization system are used to improve the vulcanization efficiency E4LYY112 and the degree of vulcanization of the rubber compound when designing the formulation of nitrile rubber/nitrile reclaimed rubber oil-resistant and shock-absorbing rubber compounds. The use of antioxidants such as NBC, MB and RD can extend the service life of nitrile/reclaimed rubber. The hybrid use of carbon black N550 and N990 is designed to improve the strength and abrasion resistance of the compound. The addition of the plasticizers dibutyl phthalate and dioctyl sebacate helps to improve the processability and flexibility of the compound.
When nitrile rubber/nitrile reclaimed rubber is used together to produce oil-resistant and shock-absorbing rubber, the vulcanizing agent DTDM can also be used to give the rubber good oil resistance, heat resistance, aging resistance, etc. DTDM can be used alone as a vulcanizing agent or in combination with other accelerators such as thiazoles, thiurames, or dithiocarbamate to increase the rate of vulcanization.
Reasonable design of oil-resistant shock-absorbing rubber vulcanization formula mixed with nitrile recycled rubber can not only meet the requirements of shock-absorbing rubber compounds in different use occasions for oil resistance, but also effectively reduce production costs and improve economic benefits. In-depth research on the application skills of nitrile reclaimed rubber in oil-resistant and shock-absorbing rubber compounds is conducive to alleviating the dependence of oil-resistant rubber products on nitrile rubber and promoting the recycling of waste rubber.
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