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SBR compound test value of main products

Description Asahi #80 Asahi #70 Asahi #70L Asahi F-200GS Asahi #65 Asahi #60HN Asahi #60U
Test items
Mooney viscosity
@125 degrees ML1+4'
47.5 48.3 48.2 51.9 42.5 44.1 38.6
Mooney scorch
@125 degrees t5
13.8 10.0 10.1 21.0 15.2 14.8 17.4
Hardness(JIS) 56 56 53 60 54 56 54
300% modulus(MPa) 7.6 9.7 6.6 11.6 9.4 10.2 9.1
Tensile strength(MPa) 23.4 23.1 22.8 17.6 18.4 19.6 18.6
Ultimate elongation(%) 631 584 641 518 587 581 574
Rebound resilience(%) 37.9 41.0 41.0 47.1 50.7 48.6 51.1
Description Asahi #55 Asahi #50HG Asahi #52 Asahi #51 Asahi #50U Asahi #50 Asahi #35
Test items
Mooney viscosity
@125 degrees ML1+4'
38.0 38.7 39.7 35.7 36.1 35.8 33.9
Mooney scorch
@125 degrees t5
18.8 22.9 23.0 19.5 15.2 18.5 13.6
Hardness(JIS) 50 50 53 48 48 48 47
300% modulus(MPa) 6.0 6.2 8.0 5.5 6.1 5.5 5.4
Tensile strength(MPa) 14.8 13.9 15.7 16.2 17.6 16.8 15.5
Ultimate elongation(%) 642 632 595 709 667 712 663
Rebound resilience(%) 56.1 57.0 55.4 57.5 53.9 56.8 56.3
Description Asahi #15HS Asahi #15 Asahi #8 Asahi Thermal Asahi AX-015 IRB7
Test items
Mooney viscosity
@125 degrees ML1+4'
37.6 36.8 30.3 36.4 39.7 45.1
Mooney scorch
@125 degrees t5
20.7 16.6 21.8 14.9 23.0 11.4
Hardness(JIS) 52 47 43 45 53 56
300% modulus(MPa) 6.9 5.2 3.3 4.0 8.0 9.6
Tensile strength(MPa) 14.3 14.3 16.3 20.0 15.7 23.3
Ultimate elongation(%) 617 671 786 773 595 568
Rebound resilience(%) 56.7 58.2 60.1 53.3 55.4 41.7
  1. * Vulcanization time is 30 min.
  2. * Asahi Thermal, Asahi #15, Asahi #15HS compound content is 80 parts per one hundred parts of rubber.

SBR compound list

SBR 137.5
Carbon black 65
Stearic acid 1
Zinc oxide 3
Accelerator DM 1.5
Accelerator D (DPG) 0.5
Sulfur 1.5