POLYSTYRENE-BASED RESIN COMPOSITION AND LIGHT GUIDE PLATE FORMED BY MOLDING SAME
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United States of America Patent
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Issued Date -
Jan 22, 2015
app pub date -
Apr 2, 2013
filing date -
Apr 2, 2012
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Abstract
Provided are: a polystyrene-based resin composition which has low water absorption, excellent suppression of warping or dimensional changes in a molded article, and excellent optical properties, and is suitable for producing a shaped light guide plate of excellent mold separation performance; and a light guide plate obtained by molding the polystyrene-based resin composition. This polystyrene-based resin composition contains 100 parts by mass of a styrene-based resin and 0.02 to 0.2 parts by mass of a phosphorus-based antioxidant, wherein the amount of 4-t-butylcatechol contained per 1 g of styrene-based resin is 1 to 6 μg.
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