HYDROGENATED NITRILE BUTADIENE RUBBER （氢化丁晴橡胶）.pdf

1 HYDROGENATED NITRILE BUTADIENE RUBBER (HNBR) PROPERTIES AND APPLICATIONS HNBR is widely known for its physical strength and retention of properties after long-term exposure to heat, oil, and chemicals. Depending on filler selection and loading, HNBR compounds typically have tensile strengths of 20 – 31 MPa when measured at 23°C. Compounding techniques allow for HNBR to be used over a broad temperature range, -40° to 165°C, with minimal degradation over long periods of time. For low-temperature performance, low ACN grades should be used; high-temperature performance can be obtained by using highly saturated HNBR grades with white fillers. As a group, HNBR elastomers have excellent resistance to common automotive fluids (e.g., engine oil, coolant, fuel, etc.) and many industrial chemicals. Like NBR, fluid and chemical resistance improves as the ACN content is increased. The unique properties attributed to HNBR have resulted in wide adoption of HNBR in automotive, industrial, and assorted, performance-demanding applications. On a volume basis, the automotive market is the largest consumer, using HNBR for a host of dynamic and static seals, hoses, and belts. HNBR has also been widely employed in industrial sealing for oil field exploration and processing, as well as rolls for steel and paper mills. Common uses of HNBR include: Automotive  Industrial  Specialized  Hi‐performance  A/C seals and hoses   Blow‐out preventers   shoe soles   Engine seals, grommets, and gaskets   Chevron seals   Fuel system seals and hoses