HNBR

Hydrogenated nitrile butadiene rubber was first developed in the late 1970s and early 1980s and the first commercial production began in 1984. The manufacturing is based on hydrogenation with H2 of the double bonds which are present in nitrile butadiene rubber.

HNBR is an improved NBR with much better resistance to ozone and high temperatures. Low temperature behavior is also here depending on the ACN content. The material shows leather like behavior at lower temperatures. However the brittle point values are very good.

General properties:

Temperature range from -40°C/-10°C to ~150°C
High mechanical properties
Good oil and chemical resistance
Good low temperature resistance

Helvoet compounds:

50 to 80 shore A
Peroxide vulcanization systems

Applications:

Automotive sealing technology in brake & fuel systems
Automotive sealing technology in gas systems