HNBR - Hydrogenated Nitrile Rubber

Description
Hydrogenated Nitrile Rubbers (HNBR)

Hardness Range
From 40 to 90 Shore A

Nitrosamine Free
Available on request

Transformation System
Injection / Compression / Extrusion

Vulcanization
Sulfur / Peroxide

Field of Application
Automotive / Oil industry (oil drilling) / Chemical sector / Cooling systems / Industrial sector (gaskets, oil seals, belts, pumps)

Main Reference Standards
Standards of major manufacturers / According to specification

Classification
Compounds based on hydrogenated nitrile elastomers allow the production of vulcanized products with specific and valuable properties, such as:

• Excellent mechanical properties
• High tensile and tear strenght
• Outstanding abrasion resistance
• Good heat resistance (up to 150°C) and good low-temperature flexibility
• Excellent resistance to ozone and weathering
• Good compression set
• Excellent resistance to lubricating oils, particularly those with amine-based additives
• Excellent resistance to coolants and other fluids used in cooling systems

Polymer Type
Hydrogenated nitrile rubbers (HNBR) are derived from standard NBR rubbers, with the residual double bonds in the butadiene portion being hydrogenated. Like standard NBR, these materials are available with varying acrylonitrile content (from 17% to 49%), but they differ in terms of their degree of unsaturation. The choice depends mainly on oil resistance and performance at low temperatures.

Applications
The excellent properties of these elastomers make them suitable for a wide range of applications requiring high mechanical strength, abrasion resistance, and chemical resistance. Common fields of application include:

• Oil drilling
• Static or dynamic seals for engine oils, brake systems, and air conditioning circuits
• Cables – pump impellers – drive belts – oil seals – gas seals