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US 12,703,632 B2Granted
Electrically conductive carbon black
AssigneeBirla Carbon U.S.A., Inc.
InventorsCharles R. Herd, James Wilfred Kollar
Life of this patent
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Abstract
A carbon black composition having a small primary particle size for use in elastomeric compositions, wherein the carbon black comprises aggregated particles configured to impart electrical conductivity to the elastomeric composition approaching that of extra-conductive carbon black, the disclosure relating to conductive carbon materials for elastomer applications and addressing the need for improved conductivity at reduced particle size.
Claims11
A carbon black having the following properties:
- a) an oil absorption number (OAN) ranging from 89 cc/100g to 109 cc/100g;
- b) a nitrogen surface area (NSA) ranging from 450 m2/g to 650 m2/g;
- c) a statistical thickness surface area (STSA) ranging from 330 m2/g to 385 m2/g;
- d) a transmission value at 425 nm ranging from 95% to 100%;
- e) a heat loss ranging from 0 to 12.5%;
- f) a 325 mesh water wash residue ranging from 0 to 40 ppm;
- g) a volatile content of less than 5%;
- and
- h) a primary particle size distribution ranging from 5 nm to 15 nm.
6 more elements
Dependencies are inferred from the claim text.