PAVEMENT MARKING, REFLECTIVE ELEMENTS, AND METHODS OF MAKING MICROSPHERES

摘要

A retroreflective article comprising first transparent microspheres and second transparent microspheres having an index of refraction within a range from 1.5 to 2.0, wherein the first and second transparent microspheres are at least partially embedded in a binder and the first microspheres have an index of refraction of at least 2.10 and comprise
at least 50 mol-% TiO 2 ; and
at least 5 mol-% of one or more metal oxides selected from oxides of lanthanide series elements and yttrium.