Polycarbonate compositions having infrared absorbance, method of manufacture, and articles prepared therefrom

摘要

A composition is disclosed, comprising a polycarbonate resin, an inorganic infrared shielding additive, and carbon black, wherein an article prepared from the composition has the inorganic infrared shielding additive present at about 0.01 to about 1.0 grams per square meter, and carbon black present at about 0.001 to about 2.0 grams per square meter. The article prepared from the composition meets at least one scale requirement for European Norm EN 169 and/or EN 171, and is useful for preparing infrared shielding protective eyewear with low haze.

主权项

1. A composition comprising:
about 70 to about 99.9 percent by weight of a polycarbonate resin, about 0.000075 to about 1 percent by weight of an inorganic infrared shielding additive comprising a metal boride, metal tungsten oxide, or combination thereof, and about 0.0001 to about 2.7 percent by weight carbon black, wherein the weight ratio of inorganic infrared shielding additive to carbon black is about 0.001:1 to about 70:1, wherein all percents by weight are based on the total weight of the composition, wherein the composition has inorganic infrared shielding additive present at about 0.01 to about 1.0 grams per square meter, carbon black present at about 0.001 to about 2.0 grams per square meter, and a haze of less than about 5% as measured at a thickness when molded of about 2.5 mm according to ASTM D 1003-00, and the composition has a melt volume rate of about 1 to about 8 grams per 10 minutes flow as determined at 300° C. and 1.2 Kg according to ISO 1133, and further wherein the respective amounts of inorganic infrared shielding additive and carbon black are effective to meet the requirements for at least one scale of European Norm EN 169 and EN 171 , while providing lower haze or lower melt volume rate or both lower haze and lower melt volume rate than the composition would exhibit if it utilized the inorganic infrared shielding additive as its only infrared absorber in an amount sufficient to meet said at least one scale of European Norm EN 169and/or EN 171.