Hydrogenated Nitrile Butadiene Rubber (HNBR)
Hydrogenated Nitrile Butadiene Rubber (HNBR), also known as Highly Saturated Nitrile (HSN), is special class of nitrile rubber (NBR) that has been hydrogenated to increase saturation of the butadiene segment of the carbon polymer backbone.
Features:
– HNBR has similar media stability to NBR but with significantly better heat and oxidization stability.
– HNBR is widely known for its physical strength and retention of properties after long-term exposure to heat, oil, and chemicals.
Application:
- Timing belts (automotive)
- Power steering rotary shaft seals
- Engine seals, grommets, and gaskets
- Oil well specialties
- Rollers
- Air conditioning hoses for cars
| Properties | HNBR |
| Hardness Range | 50 – 95 |
| Heat Resistance | Very Good |
| Ozone & Weathering | Very Good |
| Oil Resistance | Excellent |
| Mechanical Strength | Good |
| Compression Set | Good |
| Tear & Abrasion Resistance | Very Good |
| Flame Resistance | Poor |
| Water Resistance | Very Good |