Carbon blacks having low PAH amounts and methods of making same

An elastomeric composition or rubber matrix comprising at least one carbon black and at least one elastomer, wherein said carbon black having a low PAH content, wherein the PAH content is determined based on a PAH22 content, said carbon black is a furnace carbon black and has a STSA, I2No/STSA ratio, and PAH content as follows:

• a) STSA:
• 110-250 m2/g
• I2No (mg/g)/STSA (m2/g):
• 1.20 to 0.70
• PAH:
• 400 ppm or less;
• or
• b) STSA:
• 80-110 m2/g
• I2No (mg/g)/STSA (m2/g):
• 1.15 to 0.70
• PAH:
• 30 ppm or less;
• or
• c) STSA:
• 65-75 m2/g
• I2No (mg/g)/STSA (m2/g):
• 1.10-0.88
• PAH:
• 500 ppm or less
• DBP:
• 115-125 mL/100 g;
• or
• d) STSA:
• 65-80 m2/g
• I2No (mg/g)/STSA (m2/g):
• 0.70 to 0.88
• PAH:
• 500 ppm or less;
• or
• e) STSA:
• 1 to 35 m2/g
• I2No (mg/g)/STSA (m2/g):
• 1.40 to 0.70
• PAH:
• 50 ppm or less;
• or
• f) STSA:
• 70 to 90 m2/g
• I2No (mg/g)/STSA (m2/g):
• 1.00 to 1.20
• PAH:
• 50 ppm or less
• DBP:
• 60-80 mL/100 g;
• or
• g) STSA:
• 87-95 m2/g
• I2No (mg/g)/STSA (m2/g):
• 0.91 to 1.08
• PAH:
• 100 ppm or less
• DBP:
• 109-119 mL/100 g
• wherein said carbon black has the ability to impart an elongation (%) of from 300 to 600 for the elastomeric composition or rubber matrix according to ASTM D 3191-02, and impart at least one mechanical property in said rubber matrix, or said elastomeric composition, said at least one mechanical property is one or more of the following:
• abrasion resistance (21% slip),
• tensile strength (Mpa);
• ASTM D 3191-02 Standard Test Methods for Carbon Black in SBR—Recipe and Evaluation Procedures,
• 100% modulus (Mpa);
• ASTM D 3191-02 Standard Test Methods for Carbon Black in SBR—Recipe and Evaluation Procedures,
• 300% modulus (Mpa);
• ASTM D 3191-02 Standard Test Methods for Carbon Black in SBR—Recipe and Evaluation Procedures,
• ratio of 300% modulus/100% modulus (M300%/M100%);
• ASTM D 3191-02 Standard Test Methods for Carbon Black in SBR—Recipe and Evaluation Procedures,
• bound rubber (%);
• S. Wolff, M-J Wang, E-H Tan, Rubber Chem Techn, v 66, 163 (1993), or
• max tan delta @ 0° C. tested with ARES/Rheometrics Dynamic Spectrometer II (RDS II, Rheometrics, Inc., N.J) operated in a torsion strain mode (shear) with measurements performed at 0° C. for strain sweeps with double strain amplitude (DSA) ranging from 0.2 to 120%, at a constant frequency of 10 Hz, and wherein
• at least one of said mechanical properties for said carbon black is within 10% of the value for the same mechanical property for the same type of carbon black having a PAH22 content of 600 ppm to 1,000 ppm.