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Carbon black for functional rubber components

Developed Carbon black for functional rubber components

Typical Properties in EPDM Rubber

  Curing Time
(min)
SEAST
SRA
(Developed)
SEAST
G-SWA
(Developed)
SEAST
SO
(FEF)
Mooney Viscosity ML1+4 135℃ - 61.5 58.0 67.0
Mooney Scorch Time t5Lmin 135℃ - 9.8 10.2 7.7
Hardness (JIS Hs) 30' 77 76 80
200% Modulus MPa 30' 11.3 11.1 15.1
Tensile Strength MPa 30' 14.9 14.7 18.8
Elongation at Break % 30' 320 320 280
Tear Strength KN/m 40' 44 44 48
Rebound Resilience % 40' 57 59 55
Compression Set % 40' 19.7 19.5 20.5
Volume Resistivity (5V) Ω·cm 40' 7.0 5.5 2.5
Viscoelastic Property tanδ   40' 0.136 0.130 0.197
Viscoelastic Property E'   40' 13.3 13.0 18.7

* Formulation: EPDM 100, Zinc Oxide 5, Stearic Acid 1,Accelerator TS/M 1.5/0.5, Sulfur 1.5, Carbon Black 70.

* Mixing Procedure: Using B type Banbury Mixer.

* Curing Temperature 150℃.

* Measuring Method: Compression Set: 70℃, 70 hours. / Viscoelastic Property: 15Hz, ε=2.0%, at room temperature.

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