| PROPERTIES OF NITRILE ELASTOMERS |
| Description: Very good resistance to oil and gasoline; superior resistance to petroleum-based hydraulic fluids; wide range of service temperatures; good resistance to hydrocarbon solvents; very good resistance to alkalis and acids. Limitations: Inferior resistance to ozone, sunlight and natural aging; poor resistance to oxygenated solvents. Chemistry: Copolymer of butadiene and acrylonitrile. Increasing acrylonitrile content offers better oil, solvent and abrasion resistance but sacrifices low temperature properties. Trade Names: CHEMIGUM , HYCAR , PARACRIL , PERBUNAN, KRYNAC, NYSYSN |
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| SIMRIT Compound |
Color | Hardness (Shore A) |
Description |
| N455 | Black | 55 | General Purpose; Internal Lubricant |
| N475 | Black | 75 | General Purpose; Low compression set; Peroxide cure |
| N445 | Black | 70 | Internally Lubed, FDA Approved |
| N430 | Black | 80 | Internally Lubed; FDA Approved (Except Dairy, Fatty Foods) |
| N442 | Black | 70 | Internally Lubed; ANSI/NSF 61; Slight Bloom |
| N431 | Black | 60 | Internally Lubed; ANSI/NSF 61; Slight Bloom |
| N418 | Black | 70 | Internally Lubed; Heavy, white, waxy bloom |
| N447 | Black | 70 | Internally Lubed; Low temp apps |
| N470 | Black | 70 | SAE J120A Class 1 (oil service); UL Approved |
| N433 | Black | 70 | SAE J120A Class 2 (fuel service) |
| N432 | Black | 75 | Aerospace; AMS-P-25732 |
| N466 | Black | 65 | Aerospace; AMS 7271; Low temp. apps; Good fuel resistance |