Abstract:
A method of marking a pavement surface is described comprising applying a pavement marking on the pavement surface. The pavement marking comprises transparent microspheres partially embedded in a binder wherein the micropheres comprise a lanthanide series oxide or yttrium oxide and aluminum oxide, in cobination with zirconia, titania, or mixtures thereof. Retroreflective articles including pavement marking tapes and reflective elements are also described.
Abstract:
Acid-reactive dental fillers, and methods of making and using such fillers, are disclosed. The acid-reactive dental fillers include a trivalent metal, oxygen, fluorine, an alkaline earth metal, and, optionally, silicon. The acid-reactive dental fillers are preferably nanostructured, for example, in the form of nanoparticles.
Abstract:
Retrochromic articles have a retrochromic pattern comprising first and second viewable retroreflective regions, wherein at least one viewable retroreflective region comprises a plurality of intrinsically retrochromic beads. Methods for making such articles are also provided. Articles according to the present invention have covert security features, and may be used, for example, to authenticate security articles.
Abstract:
The present invention provides a method of making a plurality of intrinsically retrochromic beads. The present invention further provides a kit comprising intrinsically retrochromic beads having different retroreflective colors.
Abstract:
A co-doped silicate optical waveguide having a core including silica, and oxides of aluminum, germanium, erbium and thulium. The composition concentrations are: Er from 15 ppm to 3000 ppm; Al from 0.5 mol % to 12 mol %; Tm from 15 ppm to 10000 ppm; and Ge from 1 mol % to 20 mol %. In a specific embodiment, the concentration of Er is from 150 ppm to 1500 ppm; Al is from 2 mol % to 8 mol %; and Tm is from 15 ppm to 3000 ppm. A boron-less cladding surrounds the core.
Abstract:
The present invention relates to transparent microspheres (i.e., beads) that impart yellow color to retroreflected light. The microsphere preferably comprise titania plus alumina, zirconia, and/or silica and iron oxide, manganese oxide, or mixtures thereof. More particularly, the present invention relates to fused microspheres that impart yellow color to retroreflected light having both transparency and mechanical properties suitable, for example, for lens elements in retroreflective articles.
Abstract:
Transparent solid microspheres that contain titania plus alumina, zirconia, and/or silica in a total content of at least about 75% by weight, based on the total weight of the solid microspheres, wherein the total content of alumina, zirconia, and titania is greater than the content of silica.
Abstract:
Encapsulated electroluminescent phosphor particles and a method of making same. Each electroluminescent phosphor particle is encapsulated by a substantially transparent metal oxynitride coating. The coating provides the phosphor particle with reduced sensitivity to humidity accelerated decay.
Abstract:
Encapsulated electroluminescent phosphor particles and method for making same. The phosphor particles are encapsulated in a very thin oxide layer to protect them from aging due to moisture intrusion. The particles are encapsulated via a vapor phase hydrolysis reaction of oxide precursor materials at a temperature of between about 25.degree. C. and about 170.degree. C., preferably between about 100.degree. C. and about 150.degree. C. The resultant encapsulated particles exhibit a surprising combination of high initial luminescent brightness and high resistance to humidity-accelerated brightness decay.
Abstract:
A process for producing a tungsten oxide precursor solution that includes converting a peroxypolytungstate solution to a stable oxide polytungstate solution. The precursor solution may subsequently be transformed to tungsten oxide having electrochromic properties.