Daylight/nightglow colored phosphorescent plastic compositions and articles
AssigneeM.A. HannaColor, a division of M.A. Hanna Company
InventorsTracy L. Phillips, Jerry Alan Bodi
Life of this patent
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Abstract
The invention provides compositions and molded, extruded or formed phosphorescent plastic articles produced therefrom that contain non-radioactive, non-sulfide phosphorescent phosphor pigments that emit light in the visible spectrum, preferably metal oxide aluminate:europium-activated phosphorescent phosphor pigments, preferably in combination with polymer-soluble daylight fluorescent dyes, in transparent or translucent resins. The plastic articles produced from the compositions of the invention exhibit a remarkably rich, attractive, clear, brilliant fluorescent daylight color and a strong, long-lasting glow-in-the-dark luminescence having a color similar to that of the daylight color.
Claims23
A composition suitable for forming an entire molded, extruded or formed phosphorescent plastic article having a daylight fluorescent color and a colored luminescent glow-in-the-dark, the composition consisting essentially of:
- (a) 85% to 99% by weight of a transparent or translucent thermoplastic resin;
- (b) 1% to 15% by weight of a non-radioactive, non-sulfide phosphorescent phosphor pigment that emits light in the visible spectrum, dispersed throughout the resin;
- and
- (c) 0.001% to 1% by weight of at least one heat-stable polymer-soluble daylight fluorescent dye in solid solution with the phosphorescent phosphor pigment in the resin.
A molded, extruded or formed phosphorescent plastic article having a daylight fluorescent color and a colored luminescent glow in the dark, consisting essentially of a composition that consists essentially of (a) 85% to 99% by weight of a transparent or translucent thermoplastic resin;
- (b) 1% to 15% by weight of a non-radioactive, non-sulfide phosphorescent phosphor pigment that emits light in the visible spectrum, dispersed throughout the resin;
- and (c) 0.001% to 1% by weight of at least one heat-stable polymer-soluble daylight fluorescent dye in solid solution with the phosphorescent phosphor pigment in the resin.
Dependencies are inferred from the claim text.