Retroreflective articles with wash durable bead bond layers

Retroreflective articles include a layer of optical elements, and a polyurethane bead bond layer. The optical elements include transparent microspheres, and at least one reflective layer. The polyurethane bead bond layer is the reaction product of a reaction mixture of at least one aliphatic polycar...

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Bibliographische Detailangaben
Hauptverfasser: XIA, YING, EDWARDS, BRUCE HERBERT, NIWAS, SHRI
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:Retroreflective articles include a layer of optical elements, and a polyurethane bead bond layer. The optical elements include transparent microspheres, and at least one reflective layer. The polyurethane bead bond layer is the reaction product of a reaction mixture of at least one aliphatic polycarbonate polyol and at least one polyisocyanate, and the reaction mixture is free of polyols containing unsaturated groups. The retroreflective articles have improved wash durability.