Transparent thermoplastic composition comprising hollow glass beads
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United States of America Patent
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Feb 27, 2007
Grant Date -
N/A
app pub date -
Feb 18, 2003
filing date -
Feb 28, 2002
priority date (Note) -
Expired
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Abstract
Thermoplastic composition comprising a (meth)acrylic (co)polymer and particles of hollow glass spheres--or a mixture of particles of hollow glass spheres and particles of a mineral and/or organic compound--the said particles scattering light: having a mean size of 0.5 .mu.m to 200 .mu.m; possessing a refractive index different from that of the transparent thermoplastic by at least .+-.0.05; and being used in an amount of 5 ppm to 1000 ppm by weight with respect to the total composition. Corresponding fashioned articles, especially sheets for backlight units.
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