C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 5/3475 (2006.01) C08K 5/132 (2006.01) C08K 5/20 (2006.01) C08L 75/02 (2006.01) C08L 75/04 (2006.01)
Patent
CA 2305877
An ultraviolet light absorbing materials that resists blooming and migration is made up of a polyurethane or polyurea polymer and an amide functional ultraviolet light absorbing compound, wherein the polymer and the amide functional ultraviolet light absorbing compound are hydrogen bonded to one another. Polymeric films that contain a polymeric matrix and the ultraviolet light absorbing material are useful as the top layer in multilayer constructions such a retroreflective sheetings and conformable marking sheets.
L'invention concerne un matériau absorbant la lumière ultraviolette résistant à la formation d'un trouble superficiel et à la migration et composé d'un polymère polyuréthane ou polyurée ainsi que d'un composé amidofonctionnel absorbant la lumière ultraviolette, le polymère et le composé amidofonctionnel absorbant la lumière ultraviolette étant liés l'un à l'autre par de l'hydrogène. Des couches minces polymères contenant une matrice polymère et le matériau absorbant la lumière ultraviolette sont utiles en tant que couche supérieure dans des structures multicouches telles que des pellicules réfléchissantes et des feuilles de marquage conformables.
Burns David M.
Lasch James E.
Olson David B.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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