Feb 07，2025 by Dawn Group
HNBR DN3418 VS. HNBR DN3428: What is the difference？
HNBR DN3418 VS. HNBR DN3428
What is HNBR?
HNBR is a highly saturated elastomer which is treated by catalytic hydrogenation of nitrile rubber (NBR). Compared with NBR, the molecular structure of HNBR contains a small amount or no carbon-carbon double bonds. The HNBR has better thermal oxygen aging, ozone resistance, radiation resistance, chemical medium resistance (acid, alkali, methane, refrigerant, hydrogen sulfide) and good dynamic properties than NBR, while maintaining the oil resistance and wear resistance of NBR. The HNBR is a special rubber with excellent comprehensive properties, which is a national strategic material.
Applications of HNBR
HNBR is widely used in aerospace, automotive industry, oil drilling, machinery manufacturing, textile & printing and other fields. It is mainly used in automobile fuel system components, auto transmission belts, drilling confinements, packer rubber of oil wells, submersible pump cable sheaths of ultra-deep wells, bops, directional drillings, stator motor matching hoses of offshore oil drilling platforms, seals of aeronautics and astronautics, tank track pads, foam cushioning materials, seals of nuclear industry, hydraulic pipes, air conditioning seal products, textile & printing rubber rollers, etc.
DN3418 &DN3428
DN3418 and DN3428 are both HNBR grades produced by Dawn Special Elastomers Company.
Dawn Special Elastomers Company is an enterprise that develops, produces, and sells special elastomer HNBR products with high technology content and high added value, and at the same time extends the processing and production of mixed rubber to downstream. The special elastomer HNBR plant has a designed capacity of 3,000 tons per year, and the first phase of 1,000 tons was officially produced in 2019.
DN3418 VS. DN3428
DN3418
| Performance Parameters | Typical Value | Unit | Method |
| Iodine Value | 10-18 | mg/100mg | SH/T 1763 |
|
Hydrogenation Degree |
99 | % | SH/T 1762 |
| Acrylonitrile Content | 34.0±1.5 | % | SH/T 1157.2 |
| Mooney Viscosity | 80-95 | ML1+4100℃ | GB/T 1232.1 |
| Total Ash | ≤0.80 | % | GB/T 4498.1 |
| Volatile Matter | ≤1.00 | % |
GB/T 24131.1 |
DN3428
| Performance Parameters | Typical Value | Unit | Method |
| Iodine Value |
18-38 |
mg/100mg | SH/T 1763 |
| Hydrogenation Degree |
94 |
% | SH/T 1762 |
| Acrylonitrile Content |
34±1.5 |
% | SH/T 1157.2 |
| Mooney Viscosity |
80-95 |
ML1+4100℃ | GB/T 1232.1 |
| Total Ash |
≤0.80 |
% | GB/T 4498.1 |
| Volatile Matter |
≤1.00 |
% | GB/T 24131.1 |
Conclusion
By comparison, it is found that the iodine value and hydrogenation degree of DN3418 and DN3428 are different.
You can choose the appropriate grade according to your project requirements.
If you want to know more about Dawn HNBR, please click here.
We sincerely welcome you to inquire. Our sales team is always at your service.