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Published on January 1, 2006

Furnace Blacks for Substitution of Thermal Blacks in Hose Compounds

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Date Published January 1, 2006

This Report has been authored by:Steven Clark at Cabot Corp. #with# Irene Yurovska at Cabot Corp. #with# Gregory Gaudet at Cabot Corp. #with# Ralph Dickinson at Cabot Corp. #with# Dave Novakoski at Cabot Corp.

Historically, thermal carbon black was used in hose compounds as an extender. Due to its low surface area and structure, MT N990 allows to achieve high degrees of filler loading. However, due to the current market situation, the price of the thermal carbon black is substantially higher than prices of furnace carbon blacks. Therefore, application of N990 to reduce cost of hose compounds became not reasonable. In this study, we present data to show that it is possible to use Sterling® 1120 and Spheron® 4000 to replace N990 in typical polychloroprene compounds. In addition, substitution of a 50/50 blend N550/MT-N990 with Spheron® 6000 in peroxide cured EPDM radiator hose compound is considered. Thus, Cabot offers several distinctive furnace blacks that provide a potential to lower cost while retaining processing and physical properties of rubber compounds for hose.