NBR 6240 is a copolymer of butadiene and acrylonitrile manufactured by advanced emulsion polymerization technology of Goodyear and LG Chem.
NBR 6240 is a non staining, medium low mooney, and medium high acrylonitrile polymer designed to aid in processing operations such as extruding and calen- dering. NBR 6240 is a low temperature polymerized polymer, and such as, retains the excellent physical and processing properties of a cold nitrile rubber. NBR 6240 is recommended to use in packings, shoe products, chemically blown sponge, oil field products, industrial and automotive molded parts.
Specification
Polymerization: Cold Emulsion
Bound AN Content(%): 34.0
Volatile Matter(%): 0.2
Ash(%): 0.3
Stabilizer : Non-Staining
Mooney Viscosity(ML1+4,100℃) : 41
Color: Light Tan
Specific Gravity: 0.99
Packaging Information
Bale Weight: 35kg
Storage Condition
Rubber should be stored in suitable condition such as no sunlight, no heat and dry place.
Recipes(ASTM D3187)
NBR 6240: 100.0 phr
HAF(IRB #7): 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/㎠): 128
Elongation(%): 594
Tensile (kg/㎠) : 308
*The above data is a typical value, therefore there may be a s light difference between the elements of a supplied product and the data.
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NBR 6240 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
Rheometer(MDR,160℃×12 min,1˚Arc, MDR) ML(lb-in) 1.4
MH (lb-in): 23.6
ts1 (min.): 1.2
Tc'50 (min.) : 1.8
Tc'90 (min.): 2.8
|
Basic Properties(145℃×20min. Cured) Hardness(shore A) |
69 |
|
Elongation(%) |
400 |
|
Tensile (kg/㎠) |
187 |
|
Circulating Oven Aging(100℃×72hrs) Hardness Change(point) |
+4 |
|
Tensile Change(%) |
+5.6 |
|
Elongation Change(%) |
-26.8 |
|
Aged ASTM #1 Oil(100℃×72hrs) Hardness Change(point) |
+4 |
|
Tensile Change(%) |
+4.4 |
|
Elongation Change(%) |
-27.7 |
|
Volume Swell(%) |
-6.8 |
|
Aged ASTM #3 Oil(100℃×72hrs) Hardness Change(point) |
0 |
|
Tensile Change(%) |
+4.9 |
|
Elongation Change(%) |
-23.0 |
|
Volume Swell(%) |
-2.8 |
|
Aged FUEL C(R.T℃×72hrs) Hardness Change(point) |
-24 |
|
Tensile Change(%) |
-50.1 |
|
Elongation Change(%) |
-46.9 |
|
Volume Swell(%) |
+40.8 |
|
Compression Set(160℃×30min. Cured) 100℃×72hrs(%) |
21.1 |
|
Rebound(30℃, %) |
43.1 |
|
AKRON Abrasion |
0.2895 |
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