Covestro Makrolon® 6385 Polycarbonate, Injection Grade Polycarbonate, Unreinforced, Flame Retardant Covestro 产品说明： Low viscosity, flame retardant injection molding grade with easy mold release, not available in transparent colors. Information provided by Bayer. As of 1 September 2015, Bayer MaterialScience was separated from Bayer AG and officially adopted its new name – Covestro.