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US 12,196,987 B2Granted
Retroreflective composite reflective microspheres and reflective inorganic material
AssigneeTundra Compoistes, LLC
InventorsAdam Bartel, Kurt Heikkila, John Kroll
Life of this patent
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Abstract
A robust sintered retroreflective composite comprising, a core bead, a peripheral bead, and an interphase coating. The bead can be used in typical retroreflective indicia and uses.
Claims19
A sintered retroreflective composite comprising
- a core bead having a diameter of greater than 500μ;
- and on a core bead surface,
- a plurality of peripheral beads having a diameter of less than 400μ and having a refractive index greater than about 1.8;
- and
- a sintered interphase coating having a thickness of about 10 to 100 μm;
- wherein the retroreflective composite comprises the core bead and the peripheral beads bonded with the interphase coating comprising an inorganic pigment, a glass particulate, and an interfacial modifier.
3 more elements
Dependencies are inferred from the claim text.