XNBR : Carboxylated acrylonitrile-butadiene rubber

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

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


Product 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 its primary characteristics and uses. The relationship between material, product performance and blend options is complex.

Contact us if you are unsure about the best material for your application on +44 (0)1202 674671 or, check out our article: “Mind the gap – a guide to custom rubber” for ideas or explore our rubber compound data-sheets.