A kind of high heat aging and ozone aging nitrile/polyvinyl chloride rubber composition
A technology of polyvinyl chloride rubber and aging nitrile, which is applied in the field of rubber, can solve the problems of low compression permanent deformation, ozone cracking, etc., and achieve the effects of prolonging service life, ensuring safety, and improving heat aging resistance and ozone aging performance
Active Publication Date: 2018-05-25
NANJING ORIENTLEADER TECH CO LTD
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Problems solved by technology
Nitrile rubber (NBR) has oil resistance, wear resistance, low compression set, and good processing performance, but it is an unsaturated polymer compound, which is prone to ozone cracking
Method used
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[0021] The components and consumption of the high heat-resistant aging of embodiment 1-5 and ozone aging nitrile / polyvinyl chloride rubber composition are as shown in table 1, are prepared by the following method: take each component according to formula; Add nitrile rubber / polyvinyl chloride alloy glue, zinc oxide and anti-aging agent to the mixer at the same time, stir and heat for 50-70s, when the temperature reaches 70°C, add reinforcing agent and plasticizer, continue stirring and heating for 100-120s, wait When the temperature reaches 100°C, add stearic acid and vulcanizing agent, and continue to stir. When the temperature of the internal mixer reaches 130°C, stop stirring and heating, and remove the glue; After the rubber strip is passed through 2% zinc stearate aqueous solution, it is cooled to 20-35°C by air-cooling equipment.
[0022] Components and consumption (mass unit: gram) of table 1 embodiment 1-5 nitrile / polyvinyl chloride rubber composition
[0023]
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Abstract
The invention discloses a highly thermal-aging-resistant and ozone-aging-resistant butyronitrile / polyvinyl chloride rubber composition. The highly thermal-aging-resistant and ozone-aging-resistant butyronitrile / polyvinyl chloride rubber composition is prepared by using the following components in parts by mass: 100 parts of butyronitrile rubber / polyvinyl chloride alloy rubber, 3 to 10 parts of zinc oxide, 1.5 to 15 parts of vulcanizing agent, 0.5 to 2 parts of stearic acid, 1.5 to 8 parts of anti-aging agent, 0 to 220 parts of reinforcing agent and 10 to 35 parts of plasticizer, wherein the vulcanizing agent is mixture of vulcanizing agent TMTD, vulcanizing agent DM and vulcanizing agent DM-80; the anti-aging agent is mixture of anti-aging agent MB and anti-aging agent 4010NA; the reinforcing agent is at least one of talcum powder, light calcium carbonate, fast extruding furnace black N550 and semi-reinforcing carbon black N774. The invention improves the thermal aging and ozone aging resistance of the butyronitrile / polyvinyl chloride rubber composition and prolongs the service life of rubber hoses in automobiles.
Description
technical field [0001] The invention belongs to the technical field of rubber, in particular to a high heat aging and ozone aging nitrile / polyvinyl chloride rubber composition. Background technique [0002] With the rapid development of the automobile industry, automobile rubber hoses, as an important safety component of automobiles, have attracted more and more attention from automobile manufacturers. Since automotive rubber hoses usually work in a high-temperature semi-closed environment, especially in the case of bad road conditions, it will work in a compound environment with a certain ozone concentration, which requires automotive rubber hoses to have high heat resistance and ozone resistance. Performance, that is, the elongation change is less than 50% in 200h at 120°C, the change in hardness is not more than 15, and no cracking occurs in 240h at 100pphm×40°C×20% elongation in an ozone environment. Nitrile rubber (NBR) has oil resistance, wear resistance, low compress...
Claims
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IPC IPC(8): C08L9/02C08L27/06C08K13/02C08K3/22C08K5/09C08K3/34C08K3/26C08K3/04
CPCC08K2201/014C08L9/02C08L2201/08C08L2203/18C08L27/06C08K13/02C08K2003/2296C08K5/09C08K3/34C08K2003/265C08K3/04
Inventor 王定东苗珍珍邹惠芳
Owner NANJING ORIENTLEADER TECH CO LTD