Conformable, embossable retroreflective sheeting

G - Physics – 02 – B

Patent

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G02B 5/128 (2006.01) B60R 13/10 (2006.01)

Patent

CA 2249443

A retroreflective sheeting including: retroreflective elements (13) arranged in substantially a monolayer; a spacing layer (15) in which the retroreflective elements are at least partially embedded; a specularly reflecting layer (16) underlying the spacing layer; and a bead bond layer (14) in which the retroreflective elements are at least partially embedded. The bead bond layer includes an aminoplast-crosslinked polymer comprising urethane groups, wherein prior to crosslinking the polymer has a glass transition temperature (Tg) of less than about 0 ~C.

La revêtement décrit dans cette invention est un revêtement réfléchissant composé des éléments suivants: éléments réfléchissants (13) sensiblement sous forme de monocouche; une couche intercalaire (15) enrobant au moins partiellement les éléments réfléchissants; une couche à réflexion spéculaire (16) se trouvant sous la couche intercalaire; et une couche de perles de soudure (14) enrobant au moins partiellement les éléments réfléchissants. Cette couche de perles de soudure contient un polymère réticulé d'aminoplaste comprenant des groupes uréthane, ledit polymère ayant, avant la réticulation, une température de transition vitreuse (Tg) inférieure à environ 0 ·C.

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