XNBR : Carboxylated acrylonitrile-butadiene rubber

What are XNBR properties?

Introducing carboxylic acid groups to the polymer backbone of NBR (nitrile butadiene rubber) significantly alters the rubber’s properties – extra crosslinks in the polymer – creating a polymer matrix with significantly increased strength, tear, modulus and abrasion resistance at the expense of reduced compression set, water resistance, resilience and some low-temperature properties.

igh performance rubber belts for Cubic Transportation System

What are typical applications of XNBR?

It is recommended for applications requiring good heat, oils and abrasion resistance, such as automotive components.

Carboxylated Acrylonitrile Specifications

Hardness: Shore A (Hint)
50 – 95
Tensile Strength (1000psi)
2.5 – 7.0
Tear Resistance
Good
Impact Resistance
Excellent
Compression Set (Method B, %)
520 – 50
Electrical Resistance (Ω/cm2)
1*1011
Low Temperature
-25°C/-15°F
High Temperature
125°C/260°F
Intermittent High
140°C/285°F
Ozone (protected)
Poor
Weather and Sunlight
Good
Gas Permeation
Fair
Water
Fair
Acid/Base – dilute
Good
Acid/Base – concentrated
Fair
Solvent – Aliphatic
Good
Solvent – Aromatic
Good
Oils and Gasoline
Excellent

At DP Seals we pride ourselves on being able to provide specialist advice in selecting and developing exactly the right blend of materials to meet a vast range of performance requirements.

We also maintain a large quantity and variety of quality raw materials in stock, enabling us to offer fast turnaround and provide for tight deadlines.

The information provided here is only a guide to the primary characteristics and uses of XNBR. The relationship between material, product performance and blend options is complex.

Below you’ll find many free resources to help you think about material selection and we are always on hand to discuss your requirements and provide expert advice.

Free Resources