Astlett Rubber Inc.: Carbon Black

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 125°C	% 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 105°C

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 125°C % 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 125°C % 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 105°C

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 105°C % 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.

Material Safety Data Sheet

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.