Cabot Corporation has obtained a patent for a polymeric product comprised of at least one polymer and a blend of two or more different types of fillers having different physical, chemical, or morphological properties, wherein the blend of fillers have a unimodal pore size distribution and/or a unimodal aggregate size distribution, wherein the two or more different types of fillers each have a different DBP and the blend has a DBP that is lower than an average DBP of each filler present based on each individual DBP and amount of each filler present or wherein the two or more different types of fillers each have a different crushed DBP and the blend has a crushed DBP that is lower than any crushed DBP of each individual filler present.
Source:
http://www.coatingsworld.com/issues/0913/view_patents/cabot-patents-blends-of-carbon-black/
