LG Chemical NBR 6840 High Acrylonitrile Polymer

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LG Chemical NBR 6840 High Acrylonitrile Polymer
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)
Material Notes:	Description: NBR 6840 is a copolymer of butadiene and acrylonitrile manufactured by advanced emulsion polymerization technology of Goodyear and LG Chem. NBR 6840 is a non staining, medium low mooney, and medium high acrylonitrile polymer designed for easy processing, high productivity and excellent elastic properties. NBR 6840 offers very low mold fouling, fast cure, and high resilience. Applications: NBR 6840 is recommended to use in wide range of general purpose applications including injection molded o-rings, calendared belting, extruded hose and sponge. CAS No: 9003-18-3 Information provided by LG Chemical
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Physical Properties	Original Value	Comments

Specific Gravity	0.980 g/cc
Volatiles	0.30 %
Mooney Viscosity	40 @Temperature 100 °C	ML 1+4
Ash	<= 0.50 %

Mechanical Properties	Original Value	Comments
Hardness, Shore A	47 @Treatment Temp. 25.0 °C, Time 259000 sec	Aged fuel C
	70 @Treatment Temp. 145 °C, Time 1190 sec	Cured
	71 @Treatment Temp. 100 °C, Time 259000 sec	Aged ASTM D #3 Oil
	75 @Treatment Temp. 100 °C, Time 259000 sec	Circulating Oven Aging
	75 @Treatment Temp. 100 °C, Time 259000 sec	Aged ASTM D #1 Oil
Tensile Strength at Break	13.4 MPa @Treatment Temp. 25.0 °C, Time 259000 sec	Aged fuel C
	17.4 MPa @Treatment Temp. 145 °C, Time 1190 sec	Cured
	18.0 MPa @Treatment Temp. 100 °C, Time 259000 sec	Circulating Oven Aging
	18.0 MPa @Treatment Temp. 100 °C, Time 259000 sec	Aged ASTM D #3 Oil
	18.6 MPa @Treatment Temp. 100 °C, Time 259000 sec	Aged ASTM D #1 Oil
	28.4 MPa @Treatment Temp. 145 °C, Time 2990 sec	cured; ASTM D412
Elongation at Break	371.6 % @Treatment Temp. 25.0 °C, Time 259000 sec	Aged fuel C
	386.4 % @Treatment Temp. 100 °C, Time 259000 sec	Circulating Oven Aging
	394.9 % @Treatment Temp. 100 °C, Time 259000 sec	Aged ASTM D #1 Oil
	394.9 % @Treatment Temp. 100 °C, Time 259000 sec	Aged ASTM D #3 Oil
	417 % @Treatment Temp. 145 °C, Time 1190 sec	Cured
	517 % @Treatment Temp. 145 °C, Time 2990 sec	cured; ASTM D412
300% Modulus	145 kg(f)/cm² @Treatment Temp. 145 °C, Time 2990 sec	cured; ASTM D412
Rebound	44.3 % @Temperature 30.0 °C
Abrasion	0.3439	AKRON
Compression Set	21.2 % @Temperature 100 °C, Time 259000 sec	160°C x 30 min. Cured)

Descriptive Properties
Bound AN Content (%)	34
Color	Light Tan
Components	HAF (IRB#7)	40 phr, ASTM D3187
	NBR 6840	100 phr, ASTM D3187
	Stearic Acid	1 phr, ASTM D3187
	Sulfur	1.5 phr, ASTM D3187
	TBBS	0.7 phr, ASTM D3187
	ZnO	3 phr, ASTM D3187
Compound Recipe	Antioxidant(3-C)	1 phr
	Antioxidant(RD)	2 phr
	Carbon Black(SRF)	80 phr
	CZ	2 phr
	NBR 6840	100 phr
	Plasticizer(DOP)	10 phr
	Stearic Acid	1 phr
	Sulfur	0.5 phr
	TT	1 phr
	Zinc Oxide	5 phr
Rheometer	0.9 min	ts1, 160°C x 12 min, 1° Arc, MDR
	1.3 min	t'50, 160°C x 12 min, 1° Arc, MDR
	1.7 lb-in	ML, 160°C x 12 min, 1° Arc, MDR
	1.7 min	t'90, 160°C x 12 min, 1° Arc, MDR
	27.1 lb-in	MH, 160°C x 12 min, 1° Arc, MDR
Volume Swell (%)	-2.9	Aged ASTM D #3 Oil (100°C x 72hrs)
	41.2	Aged fuel C (23°C x 72hrs)
	-6.8	Aged ASTM D #1 Oil (100°C x 72hrs)

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