Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
- Materials Features
- Product Background
Hydrogenated AcryloNitrile Butadiene Rubber (HNBR) properties depend upon the acrylonitrile content and the degree of hydrogenation of the copolymer. They have somewhat better oil and chemical resistance than nitrile rubber and can withstand much higher temperatures.
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Advantages of HNBR
- HNBR has excellent resistance to sour oil and gas, steam, hot water and ozone. Physical properties such as tensile and tear strength, elongation, abrasion resistance and compression set are excellent, while compounds exhibit good dynamic behavior at elevated temperatures. Like EPDM, hydrogenated nitrile rubber can either be cured with sulfur or peroxide, depending upon which properties are the most important. Components in HNBR offer an excellent range of performance at a cost between nitrile rubber and fluoroelastomers (FKM).
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Disadvantages of HNBR
- The limitations of HNBR include poor electrical properties, poor flame resistance, and it can easily be damaged by aromatic oils and polar organic solvents.
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Applications & Uses
- Markets
- Plastics & Elastomers End Uses
- Typical Applications
- Accumulator Bladders
- Diaphragms
- Gaskets
- Seals (especially for the oil and gas industries)
Properties
- Color
- Typical Properties
- Note
* - Low Temperature Stiffening (Gehman)
| Value | Units | Test Method / Conditions | |
| Density | 1.25 - 1.29 | lg/cm | ISO 2781 |
| Hardness | 84 - 94 | IRHD | ISO 48 |
| Tensile Strength | 26.6 | MPa | ISO 37 |
| Elongation at Break | 143.0 | % | ISO 37 |
| Compression Set (22 hours at 70°C) | 9.7 | % | ISO 815-1 |
| Compression Set (22 hours at 100°C) | 10.4 | % | ISO 815-1 |
| Temperature at which apparent torsional modulus is 70 MPa | -25.0 | °C | ISO 1432:2013 |
| Service Temperature | -25 to 160 | °C | — |