'TUNGSTEN CONTAINING INORGANIC PARTICLES WITH IMPROVED PHOTOSTABILITY'

摘要

This disclosure relates to inorganic particles, typically inorganic metal oxide or mixed metal oxide particles, and more typically titanium dioxide (TiO2) particles, comprising at least about 0.002 % of tungsten, based on the total weight of the inorganic particles, wherein inorganic particles have a photostability ratio (PSR) of at least about 2, as measured by the Ag+ photoreduction rate, and color as depicted by an L* of at least about 97.0, and b* of less than about 4. These titanium dioxide particles comprising tungsten may further comprise alumina.