Patent ID: 9618868
Date: 2017-04-11
CPC Classifications: G03G,Y10T

Claim:
1. A non-conductive metallic dry toner particle consisting essentially of a polymeric binder phase and non-conductive metal oxide particles dispersed within the polymeric binder phase and that is free of additional non-metallic colorants, wherein: (a) the non-conductive metallic dry toner particle has a mean volume weighted diameter (D (b) at least 50 weight % of the total non-conductive metal oxide particles within the non-conductive metallic dry toner particle have an aspect ratio of at least 5 and an ECD of at least 2 μm and up to and including 50 μm, (c) the non-conductive metal oxide particles are present in an amount of at least 20 weight % and up to and including 50 weight %, based on total non-conductive metallic dry toner particle weight, (d) the ratio of the non-conductive metallic dry toner particle D (e) the non-conductive metal oxide particles consist essentially of: (i) a silica, alumina, or mica substrate having an outer surface, and (ii) disposed on at least part of the substrate outer surface, one or more layers of an oxide of iron, chromium, silicon, titanium, or aluminum, each of the one or more layers having an average dry layer thickness of at least 30 nm and up to and including 700 nm so that the total average dry thickness of all oxide layers is at least 30 nm and up to and including 1400 nm, (f) at least one of the layers of an oxide of iron, chromium, silicon, titanium, or aluminum, forms the outermost layer of the non-conductive metal oxide particle, and (g) the non-conductive metallic dry toner particle is non-magnetic.