IP Library Granted Patent US 8,124,682
Granted Patent B2
US 8,124,682 · App. 12/950,224 · Granted Feb 28, 2012

Rubber mixture

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Quick Facts
Patent No.
US 8,124,682
App. No.
12/950,224
Granted
Feb 28, 2012
Kind
B2
Abstract

The invention relates to a rubber mixture comprising at least one rubber and at least one low-PAH-content carbon black, where the low-PAH-content carbon black has (A) an iodine number of from 17 to 75 mg/g, (B) an STSA surface area of from 17 to 64 m 2 /g, (C) an iodine number:STSA surface area ratio >1.06 mg/m 2 , (D) an OAN number of from 60 to 160 ml/100 g, (E) a COAN number of from 40 to 110 ml/100 g, (F) a mode greater than 100 nm and (G) benzo(a)pyrene content <2 ppm. The rubber mixture can be used to produce technical rubber items and tyres.

Claims (18)

1. A rubber mixture comprising at least one rubber and at least one low-PAH-content carbon black, characterized in that the low-PAH-content carbon black has

(A) an iodine number of from 17 to 75 mg/g,

(B) an STSA surface area of from 17 to 64 m 2 /g,

(C) an iodine number:STSA surface area ratio >1.06 mg/m 2 ,

(D) an OAN number of from 60 to 160 ml/100 g,

(E) a COAN number of from 40 to 110 ml/100 g,

(F) a mode greater than 100 nm and

(G) benzo(a)pyrene content <2 ppm.

2. The rubber mixture according to claim 1 , wherein the benzo(a)pyrene content of the low-PAH-content carbon black is <1 ppm.

3. The rubber mixture according to claim 1 , wherein the benzo(a)pyrene content of the low-PAH-content carbon black is <0.5 ppm.

4. The rubber mixture according to claim 1 , wherein the benzo(a)pyrene content of the low-PAH-content carbon black is <0.1 ppm.

5. The rubber mixture according to claim 1 , wherein the STSA surface area of the low-PAH-content carbon black is from 36 to 64 m 2 /g.

6. The rubber mixture according to claim 5 , wherein the STSA surface area of the low-PAH-content carbon black is from 36 to 50 m 2 /g.

7. The rubber mixture according to claim 5 , wherein the transmittance of the low-PAH-content carbon black at 300 nm is >45% and <98%.

8. The rubber mixture according to claim 7 , wherein the transmittance of the low-PAH-content carbon black at 300 nm is >45% and <95%.

9. The rubber mixture according to claim 7 , wherein the transmittance of the low-PAH-content carbon black at 300 nm is >45% and <90%.

10. A method of producing rubber items or tires, comprising:

processing a rubber mixture according to claim 1 to form a rubber item or tire.