MIGRATION OF ANTIOZONANT FROM NEOPRENE HOSE COVERS
Certain fuel line hoses having neoprene covers and nitrile inner tubes and test slabs of these materials were subjected to accelerated heat, fuel, and ozone exposure. Results indicate some neoprene hose covers can lose ozone resistance after severe test exposure to heat and/or fuel circulation. Chemical analysis indicates that one type of antiozonant, nickeldibutyldithiocarbamate, is extracted out of the neoprene cover by fuel circulation through the inner nitrile tube. Similarly, heat aging causes a migration of this antiozonant from the neoprene cover into the nitrile tube. These two factors are largely responsible for the loss of ozone resistance. Extraction of plasticizing oil also occurs during fuel circulation with subsequent hardening of hoses. However this contributes only in a secondary manner to the observed loss of ozone resistance. Test conditions for candidate fuel line hoses are recommended to provide improved ozone resistance.
- Presented at SAE Passenger Car Meeting, Dearborn, Michigan, 11-15 June 1979.
Warrendale, PA USA 15096
- Wyzgoski, M G
- Publication Date: 1979-6
- Pagination: 19 p.
- Society of Automotive Engineers Preprint
- Publisher: Society of Automotive Engineers
- TRT Terms: Crash exposure; Fuel systems; Fuels; Heat; Hoses; Neoprene; Ozone; Rubber; Rubber compounds; Synthetic rubber; Vehicular materials
- Uncontrolled Terms: Exposure
- Old TRIS Terms: Automobile materials; Fuel hoses; Fueling systems; Neoprene/nitrile fuel hoses; Nickeldibutyldithiocarbamate; Ozone resistance; Resistance
- Subject Areas: Energy; Geotechnology; Highways; Materials; Safety and Human Factors; Vehicles and Equipment;
- Accession Number: 00303445
- Record Type: Publication
- Source Agency: Engineering Index
- Report/Paper Numbers: SAE 790658, HS-029 325U
- Files: HSL, TRIS
- Created Date: Jan 30 1984 12:00AM