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Carbon Black

Carbon Black is made of fine particles of amorphous carbon and is produced by partial combustion of petroleum or natural gas.

The modification of an elastomer by carbon black reinforcement and vulcanization transforms the soft elastomer into a strong, elastic product. A rubber compounder must select the right polymer, the right carbon black grade/loading level combination, and the right vulcanization system to give a rubber compound with the desired properties at the lowest possible cost.

Astlett Rubber supplies carbon black from Russia and Ukraine. We sell all of the most common ASTM grades in three modes: Furnace (N220 to N774), Thermal (N990/N991), and Channel (K354). The specification chart below highlights some of the more popular grades of Carbon Black. If the grade you are looking for is not listed below, please contact us.

Typical Characteristics

  Unit K-354 N-220 N-330 N-339 N-550
Iodine Adsorption g/kg 65 - 75 121 +/- 5 82 +/- 5 90 +/- 5 43 +/- 5
CTAB Surface Area m2/g - 111 +/- 7 83 +/- 6 95 +/- 6 42 +/- 5
DBP Absorption cm3/100g 90 - 108 114 +/- 5 102 +/- 5 120 +/- 5 121 +/- 5
pH Value   3.7 - 4.5 6 - 9 6 - 9 6 - 9 6 - 9
Heating Loss at 125C % max 1.5* 1.0 1.0 1,0 1.0
Ash Content % max 0.05 0.45 0.45 0.45 0.45
Sieve Residue % max 0.1 - 0.001 0.1 - 0.001 0.1 - 0.001 0.1 - 0.001 0.1 - 1.001
Sulfur Content % max - 1.1 1.1 1.1 1.1
Toluene Discoloration % min - 90 90 90 85
Pour Density kg/m3 - 330 340 320 330
Fine Content % max 6 15 15 15 15
Nitrogen Surface Area m2/g 150 - - - -
Physical Form   Granule Dry Pellet Dry Pellet Dry Pellet Dry Pellet
* indicates Heating Loss at 105C

  Unit N-660 N-762 N-765 N-772
Iodine Adsorption g/kg 36 +/- 5 30 +/- 5 25 - 35 28 +/- 4
CTAB Surface Area m2/g 36 +/- 5 25 - 33 - 29 - 37
DBP Absorption cm3/100g 90 +/- 5 65 +/- 4 110 - 120 65 +/- 5
pH Value   6 - 9 9 - 11 7 - 9 9 - 11
Heating Loss at 125C % max 1.0 0.3 0.9 0.3
Ash Content % max 0.45 0.5 0.45 0.4
Sieve Residue
    35 mesh
    325 mesh
% max 0,1 - 0,001  
0.0001
0.005
 
0.001
0.1
 
0.0001
0.005
Sulfur Content % max 1.1 0.1 - 0.1
Toluene Discoloration % min 80 70 - 70
Pour Density kg/m3 375 480 365 - 395 460
Fine Content % max 15 7 - 7
Nitrogen Surface Area m2/g - 30 +/- 5 - 30 +/- 5
Physical Form   Dry Pellet Dry Pellet Wet Pellet Dry Pellet

  Unit N-774 N-990 N-991 P-803
Iodine Adsorption g/kg 29 +/- 4 8 +/- 4 8 +/- 4 -
CTAB Surface Area m2/g 25 - 33 7 7 -
DBP Absorption cm3/100g 72 +/- 4 35 +/- 5 35 +/- 5 76 - 90
pH Value   9 - 11 7 - 11 7 - 11 7 - 9
Heating Loss at 125C % max 0.3 0.01 0.01 0.5*
Ash Content % max 0.5 0.5 0.5 0.45
Sieve Residue
    35 mesh
    325 mesh
% max  
0.0001
0.005
 
0.0001
0.002
 
0.001
0.02
 
0.001
0.08
Sulfur Content % max 0.1 0.1 0.1 -
Toluene Discoloration % min 70 80 80 -
Pour Density kg/m3 490 550 550 320 - 400
Fine Content % max 7 8 - 6
Nitrogen Surface Area m2/g 30 +/- 5 9 - 11 9 - 11 14 - 18
Physical Form   Dry Pellet Granule Powder Granule
* indicates Heating Loss at 105C

  Unit P-705 P-803 P-805E P-805S
Iodine Adsorption g/kg - - - -
CTAB Surface Area m2/g - - - -
DBP Absorption cm3/100g 115 - 125 86 - 100 110 - 140 76 - 92
pH Value   7.5 - 9.5 7.5 - 9.5 7.5 - 9.5 7.5 - 9.5
Heating Loss at 105C % max 0.5 0.5 0.2 0.5
Ash Content % max 0.2 0.2 0.1 0.2
Sieve Residue
    35 mesh
    325 mesh
% max  
0.001
0.08
 
0.001
0.08
 
0.001
0.08
 
0.001
0.08
Sulfur Content % max - - - -
Toluene Discoloration % min - - - -
Pour Density kg/m3 - - - -
Fine Content % max - - - -
Nitrogen Surface Area m2/g 20 - 26 14 - 18 13 - 17 25 - 30
Physical Form   Powder Powder Powder Powder

These figures are typical values. Specific values may vary by producer.

Download in printable PDF format


Material Safety Data Sheet Adobe PDF File

Download our Carbon Black Material Safety Data Sheet (MSDS) for more information. The file is provided in Adobe PDF format for easy viewing and printing.


Excerpts on this page taken from:
Morton, Maurice, ed. Rubber Technology, Third Edition. Kluwer Academic Publishers, 1999.
Copyright © 2012 Astlett Rubber Inc.