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Dow SE BR-1220M Stereospecific high cis-1,4 Polybutadiene (BR)
Categories: Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)

Material Notes: SE BR-1220M is manufactured by a solution process using cobalt catalyst which produces polymers with a very light color and low ash content. A non-staining stabilizer is added during the production process. BR-1220M is suitable for tires, conveyor belting, footwear and mechanical goods. It offers a unique property combination of good abrasion resistance, particularly at high severity, excellent groove crack resistance and good heat aging.

Other features include high resilience, low hysteresis, good set properties and a low glass transition point which results in better low temperature performance. BR-1220M is able to accept high filler and oil loadings without significant loss of properties. It may be blended with natural rubber and styrene butadiene (SBR), isoprene (IR), nitrile (NBR), or polychloroprene (CR) synthetic rubbers. BR-1220M is supplied in bales weighing ca. 34 kg. Bales are wrapped in 50 micron PE or EVA film.

Information provided by Dow

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Physical PropertiesMetricEnglishComments
Viscosity Measurement  6.8
@Temperature 160 °C
6.8
@Temperature 320 °F
[min]; ts1, (1 RAD); ASTM D2084
 10.1
@Temperature 160 °C
10.1
@Temperature 320 °F
[min]; T50, (1 RAD); ASTM D2084
 10.2
@Temperature 160 °C
10.2
@Temperature 320 °F
[dNm]; ML, (1 RAD); ASTM D2084
 13.3
@Temperature 160 °C
13.3
@Temperature 320 °F
[min]; T90, (1 RAD); ASTM D2084
 40
@Temperature 160 °C
40
@Temperature 320 °F
[dNm]; MH, (1 RAD); ASTM D2084
Mooney Viscosity 45
@Temperature 100 °C
45
@Temperature 212 °F
[MU]; ML 1+4; ASTM D1646
Ash 0.030 %0.030 %ASTM D1416
Collected Volatile Condensable Material 0.20 %0.20 %ASTM D1416
Storage Temperature <= 30.0 °C<= 86.0 °F
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength, Ultimate 16.2 MPa2350 psiDie C (35 min / 145°C); ASTM D412
Tensile Stress at Strain 9.30 MPa
@Strain 300 %
1350 psi
@Strain 300 %
ASTM D412
Elongation at Break 492 %492 %ASTM D412
 
Processing PropertiesMetricEnglishComments
Shelf Life >= 12.0 Month>= 12.0 Month
 
Descriptive Properties
Accelerator (TBBS) wt%0.9ASTM D3189
Carbon Black wt%60ASTM D3189; IRB 6
Cis-1,4 Content %97Supplier Method (NMR)
Dry Gel Content mg/kg200Supplier Method
Naphthenic oil type 103 wt%15ASTM D226
Stearic Acid wt%2ASTM D3189
Sulfur content, %1.5ASTM D3189
Zinc Oxide wt%3ASTM D3189

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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