FIELD: chemistry.
SUBSTANCE: invention relates to a monolithic sheet for light scattering shaped articles used in flat screens. The sheet is made from a composition which contains (a) 80-99.99 wt % transparent polycarbonate with ISO 13468-2 light transmission greater than 88.5% (for sample thickness of 4 mm), and (b) 0.01-20 wt % poly(meth)acrylate particles with nucleus/shell morphology, particle size of 0.5-100 mcm, and refraction index different from the refraction index of transparent polycarbonate. The sheet does not contain a dye selected from a group comprising antanthrones, anthraquinones, benzimidazoles, diketopyrrolopyrroles, isoindolinols, perynones, perylenes, phthalocyanines, quinacridones, quinophthalones and their combinations, but additionally contains 0.001-0.2 wt % optical bleaching agent and 0.01-0.5 wt % UV-absorber.
EFFECT: invention enables to obtain monolithic sheets with thickness of 2 mm with high degree of light transmission and brightness.
9 cl, 1 tbl, 11 ex
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Authors
Dates
2011-02-10—Published
2006-02-22—Filed