HNBR is a hydrogenated version of NBR (nitrile) rubber. NBR is a copolymer of ACN and 1,3-butadiene. The NBR backbone still contains double bonds remaining from the 1,3-butadiene monomer units. These double bonds are also prone to chemical attack, thermal degradation and oxidation. To improve these properties, NBR can be hydrogenated in a catalytic hydrogenation process to form HNBR.
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 °C to 150 °C, and 160 °C in oil, 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.
HNBR is used in a wide range of applications, including automotive (coolant, AdBlue, oil, fuel systems), industrial applications.
HNBR rubber molded products
ASTM D2000, SAE J200.
RMA A1,A2,A3, DIN ISO 3302-1,DIN-7715/BS-3734
Black or according to customers' requirements
Molded Rubber Parts
From 30 Shore A to 90 Shore A
20-35days after prepayment received
By express(DHL/UPS/FEDEX)/By sea/By air
FOB SHANGHAI OR NINGBO
pp bag inside
carton box outside
According to clients' requirement
●Excellent media resistance
●Excellent heat and oxidation stability
●High mechanical strength
●Improved wear resistance
●Good in (ultra-pure) water and steam
●Temperature range from –30 °C to +160 °C