According to the report on Cabot Corporation's official website, the recycling and reuse of waste tires are gradually becoming a focal point in the global tire industry. Cabot Corporation introduced a new recycled semi-reinforcing carbon black, STERLING® SO-RC110, at the 2023 International Rubber Conference (IRC 2023). This carbon black belongs to the ASTM N550 type and is derived from Cabot's EVOLVE® sustainable technology platform, including 10% recycled carbon black (rCB) from waste tires.
The STERLING® SO-RC110 utilizes a blending pelletization technique, incorporating certified recycled carbon black from the International Sustainability and Carbon Certification organization (ISCC PLUS) into the traditional STERLING® SO (Cabot's N550 carbon black brand). This results in a new recycled product equivalent to ASTM N550 carbon black, maintaining significant consistency in rubber properties, product quality, and processing.
As indicated by the technical data, the recycled semi-reinforcing carbon black STERLING® SO-RC110 was compared with regular STERLING SO carbon black in a basic formulation of natural rubber/solution styrene-butadiene rubber (SBR) 50/50 for sidewall rubber, with no adjustments made to other compounding agents. This recycled semi-reinforcing carbon black is particularly suitable for situations where there is a need to enhance the sustainable components of the product without compromising the rubber's performance. STERLING® SO-RC110 is applicable to all areas using ASTM N550 carbon black, such as sidewall and under-tread rubber for passenger and light truck tires, as well as in industrial rubber products like extruded rubber items (e.g., hoses and shaped sealing gaskets), engine mountings, belt inner liners, and molded rubber products or components, among others.