HNBR, or Hydrogenated Acrylonitrile Butadiene Rubber, is a rubber produced by chemical conversion of NBR rubber. This involves the removal of double bonds between the carbon atoms of the polymer by selective hydrogenation. After the reaction, an elastic plastic is formed that is characterized by significantly greater reaction inertia than non-hydrogenated acrylonitrile-butadiene rubber.
With these properties, HNBR is used primarily in the automotive industry. Hydrogenated acrylonitrile butadiene rubber is used primarily for the production of V-belts and timing belts. These components are subjected to the greatest stresses under the most adverse weather conditions and must be extremely abrasion-resistant. At Sattler SCM you will find HNBR for almost every application.
The abbreviation HNBR is derived from the English designation hydrogenated nitrile-butadiene rubber. These and other interesting facts about HNBR can be found on our product page.
Hydrogenated acrylonitrile butadiene rubber is superior to its chemical origin NBR in many respects. Selective hydrogenation, i.e. the introduction of hydrogen atoms to the polymer chain, drastically reduces the reactivity of the elastomer. This increased inertness results in a number of practically useful advantages:
Selective hydrogenation of NBR results in an elastomer whose physical and mechanical properties significantly exceed those of the starting material. The properties of HNBR can be further adapted by selective hydrogenation and variation of the degree of hydrogenation.
In general, a distinction can be made between fully hydrogenated and partially hydrogenated HNBR grades.
Partially hydrogenated HNBR is characterized by improved low-temperature flexibility and lower compression set. As with most elastomers, the crosslinking of the individual polymer chains to one another takes place via sulfur bridges.
Fully hydrogenated HNBR grades, on the other hand, can be cross-linked with peroxides and boasts excellent aging properties.
In addition to its use in the automotive industry, hydrogenated acrylonitrile butadiene rubber is used in a whole range of other industries. The following products are made from HNBR:
For example, we recommend O-rings made of HNBR whenever severe temperature fluctuations, permanent exposure to weathering or heavy contact with mineral oils is to be expected.
Bellows used in vehicle construction are always exposed to very high mechanical forces and environmental influences. For reasons of durability, we recommend products made of HNBR here as well.
At Sattler SCM, we combine knowledge and experience with the latest techniques for producing and processing HNBR. As a medium-sized company, we accompany our customers through every step of production, from the initial idea to the finished product. We take your wishes seriously and turn your ideas into the best HNBR product for you. Trust us and contact our experts.
Send a product inquiry or call us, 07195/ 5830-974