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Paracril B is a copolymer of butadiene and acrylonitrile, hot polymerized with a non-staining stabilizer.

Polymer Name: Acrylonitrile Butadiene Rubber (NBR)

End Uses: Automotive Applications, Coated Fabrics, Hoses, Machine/Mechanical Parts, O Rings, Tires

Features: Good Green Strength, Low Temperature Flexibility, Oil Resistant

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Identification & Functionality

Chemical Family
CAS No.
128-37-0
EC No.
204-881-4
Technologies

Features & Benefits

Applications & Uses

Applications

Paracril B offers excellent balance of low temperature flexibility with oil resistance and a high green strength. It is recommended for automotive products, seals, hoses, O-rings, packing’s, adhesives, sponge, coated fabrics and roll covers.

Recommended Appliactions:

  • Sponge
  • Seals
  • Custom mix
  • Mechanical goods

Properties

Chemical Properties
ValueUnitsTest Method / Conditions
Total Volatile Mattermax. 1%ASTMD 5668
Total Ashmax. 0.8%ASTMD 5667
Bound ACN28 - 31%INSA
Specific Gravity0.97g/ccASTMD 297
Mooney Viscosity ML (1+4) at 100°C78 - 92MUASTMD 1646
Cured Properties
ValueUnitsTest Method / Conditions
Curing Time at 160°C (ML)4.1 - 12.3lb-inASTMD 2084
Curing Time at 160°C (MH)21.9 - 35.9lb-inASTMD 2084
Curing Time at 160°C (tc (1))min. 2.8 - 4.2-ASTMD 2084
Curing Time at 160°C (tc (50))min. 4 - 6-ASTMD 2084
Curing Time at 160°C (tc (90))min. 11.0 - 20.6-ASTMD 2084

Regulatory & Compliance

Certifications & Compliance

Packaging & Availability

Packaging and Storage

This product is commercialized in 25 Kg/Bale (55 Lb. /Bale) - 1,000 Kg/Skid - Net (2,200 Lb. /Skid.) rectangular bales individually wrapped in low melting point polyethylene film. Tolerance in all bale and packaging weights +1 percent.

tore in a dry and ventilated area where it will not be exposed to direct sunlight, extreme temperatures or sources of ignition.Please consult Paracril B “Material Safety Data Sheet” (MSDS) for more detailed handling and storage information.