NBR 6250 is a copolymer of butadiene and acrylonitrile manufactured by advanced emulsion polymerization technology of Goodyear and LG Chem.
NBR 6250 is a non staining, medium mooney, and medium high acrylonitrile polymer designed to aid in processing operations such as extruding and calendering.
NBR 6250 is a low temperature polymerized polymer, and such as, retains the excellent physical and processing properties of a cold nitrile rubber. NBR 6250 is recommended to use in packings, shoe products, chemically blown sponge, oil field products, industrial and automotive molded parts. NBR 6250 is a high mooney version of NBR 6240.
Polymerization: Cold Emulsion
Bound AN Content(%): 33.9
Volatile Matter(%): 0.2
Ash(%) Max.: 0.5
Stabilizer: Non-Staining
Mooney Viscosity(ML1+4,100℃) : 50
Color: Light Tan
Specific Gravity: 0.99
Packaging Information
Bale Weight : 35kg
Bale wrapping film : LDPE
Shelf Life : 18 months from date of production at room temperatures not exceeding 30℃ under belowed storage condition (Retest critical parameters like MV and others after the expiry of shelf life).
Storage condition
NBR should be stored in warehouse to be protected from sunlight, heat, moisture and foreign materials.
- Recipes: (ASTM D3187)
- NBR: 6250 100.0 phr
- HAF(IRB #8): 40.0
- ZnO: 3.0
- Stearic Acid: 1.0
- TBBS: 0.7
- Sulfur: 1.5
- Total: 146.2
- Stress-Strain Properties
- (ASTM D412, 145℃×50min. Cured)
- 300% Modulus(kg/㎠) 124
- Elongation(%) 590
- Tensile (kg/㎠) 293
*The above data is a typical value, therefore there may be a slight difference between the elements of a supplied product and the data.
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Nbr 6250 Packing Study
Carbon Black(SRF): 80.0
Zinc Oxide : 5.0
Stearic Acid: 1.0
Antioxidant(RD): 2.0
Antioxidant(3-C): 1.0
Plasticizer(DOP): 10.0
Sulfur: 0.5
TT: 1.0
CZ: 2.0
Total: 202.5
Mooney Viscosity: (ML1+4,100℃) 62
Rheometer: (MDR,160℃×12 min,1˚Arc, MDR) ML(lb-in) 2.0
MH (lb-in) : 25.0
ts1 (min.): 1.0
Tc'50 (min.): 1.7
|
Basic Properties(145℃×20min. Cured) Hardness(shore A) |
69 |
|
Elongation(%) |
410 |
|
Tensile (kg/㎠) |
195 |
|
Circulating Oven Aging(100℃×72hrs) Hardness Change(point) |
+1 |
|
Tensile Change(%) |
+7.9 |
|
Elongation Change(%) |
-17.4 |
|
Aged ASTM #1 Oil(100℃×72hrs) Hardness Change(point) |
+1 |
|
Tensile Change(%) |
+5.3 |
|
Elongation Change(%) |
-19.6 |
|
Volume Swell(%) |
-6.2 |
|
Aged ASTM #3 Oil(100℃×72hrs) Hardness Change(point) |
-1 |
|
Tensile Change(%) |
+4.9 |
|
Elongation Change(%) |
-17.6 |
|
Volume Swell(%) |
-1.7 |
|
Aged FUEL C(R.T℃×72hrs) Hardness Change(point) |
-24 |
|
Tensile Change(%) |
-51.6 |
|
Elongation Change(%) |
-51.2 |
|
Volume Swell(%) |
+43.5 |
|
Compression Set(160℃×30min. Cured) 100℃×72hrs(%) |
18.3 |
|
Rebound(30℃, %) |
46.0 |
|
AKRON Abrasion |
0.3105 |
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