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US 5,474,827 AGranted
Retroreflective article and method of making the same
AssigneeMinnesota Mining and Manufacturing Company
InventorsMichael D. Crandall, Allen L. Griggs, Peter M. Olofson, Taun L. McKenzie, Theresa M. Watschke
Life of this patent
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Abstract
A retroreflective article (100, 200, 300) includes a monolayer of retroreflective elements (120, 220, 320), a binder layer (110, 210, 310), and a compound comprising an aromatic bidentate moiety. The retroreflective elements (120, 220, 320) are partially embedded in the binder layer (110, 210, 310), and the compound is chemically associated with the retroreflective elements (120, 220, 320) to provide extraordinary laundering durability to the retroreflective article (100, 200, 300).
Claims22
A retroreflective article comprising:
- a polymeric binder layer having first and second major surfaces;
- a monolayer of optical elements having portions at least partially embedded in the first major surface of the binder layer;
- a reflective metal disposed at least beneath the embedded portions of the optical elements;
- and
- a compound having at least a first constituent comprising an aromatic bidentate moiety, the compound being chemically associated with the reflective metal.
2 more elements
Dependencies are inferred from the claim text.