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Carbon Black – N220, N231, N234, N326, N330, N339 Highly Reinforcing - Tire Grades CAS# 1333-86-4

These WESTCO™ Carbon blacks are fine particle size, highly reinforcing carbon blacks used most commonly in tire applications.  Medium sized, semi-reinforcing grades for use in a variety of rubber compounds.  They offer improved tensile strength and modulus as well as increased abrasion resistance in tires and other rubber products.  The less reinforcing grades enhance the extrudability  and mold flow of compounds while the highly reinforcing grades are recommended for compression molding applications.

SPECIFICATIONS:

ASTM Grade
N220

N231, N234, N326, N330, N339

*Iodine Absorption #, g/kg
114-128

114-128, 113-127, 75-89, 78-89, 85-95

*DBP Absorption. cc/100g
107-121

86-98, 118-132, 65-79, 95-109, 115-125

*Heating Loss, % max
2.5

2.5, 2.5, 2.5, 2.5, 2.5

*pH
5.5-8.5

5.5-8.5, 5.5-8.5, 5.5-8.5, 5.5-8.5 , 5.5-8.5

*Ash, % max
0.7

0.7, 0.7, 0.7, 0.7, 0.7

*325 Mesh Sieve, % max
0.1

0.1, 0.1, 0.1, 0.1, 0.1

*Average Pellet Hardness
25-55

20-50, 20-50, 20-50, 20-50, 20-50

*Individual Pellet Hardness, max
90

90, 90, 90, 90, 90

CTAB Surface Area, m²/g
102-120

104-118, 110-128, 74-92, 73-91, 86-96

Nitrogen Surface Area, m²/g
112-126

112-128, 112-126, 71-85, 71-85, 83-93

Tire Grade

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  • Western Reserve Chemical
  • 4837 Darrow Road
  • Stow, OH 44224

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