HNBR Rubber Compound

About HNBR Rubber Compound

Hydrogenated nitrile butadiene rubber (HNBR)

Also known as highly saturated nitrile  HNBR is widely known for its physical strength and retention of properties after long-term exposure to heat, oil, and chemicals. Trade names include. It is commonly used to manufacture O-rings for automotive air-conditioning systems.Other applications include timing belts, dampers, servo hoses, membranes, and seals.

Depending on filler selection and loading, HNBR compounds typically have tensile strengths of 20 31 MPa at 23 C. Compounding techniques allow for HNBR to be used over a broad temperature range, 40 C 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.).

The unique properties and higher temperature rating attributed to HNBR when compared to NBR has 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.