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US 11,591,475 B2Granted
Polycarbonate resin composition and optical molded product including the same
AssigneeLG Chem, Ltd.
InventorsByoungkue Jeon, Youngwook Son, Daehyeon Hwang, Mooho Hong
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Abstract
Provided are a polycarbonate resin composition comprising a polycarbonate resin, pentaerythritol tetrastearate, a black dye, and a blue dye, and an optical molded product comprising same.
Claims9
A polycarbonate resin composition, comprising:
- a polycarbonate resin having a melt flow rate (MFR) of 5 to 15 g/10 min at 300° C. under a load of 1.2 kg according to ASTM D1238, and that includes a repeating unit of Chemical Formula 1:
- wherein in Chemical Formula 1, a is an integer of 1 or more, and
- the polycarbonate resin has a weight average molecular weight of 32,000 g/mol to 50,000 g/mol;
- pentaerythritol tetrastearate;
- a black dye, wherein a total amount of black dye present is an amount from 1.0×10−4 to 2.0×10−3 parts by weight, based on 100 parts by weight of the polycarbonate resin, and wherein the black dye is C.I. Pigment Black 32;
- and
- a blue dye,
- wherein:
- transmittance at 410 nm according to ASTM D1003 is 7% or less, and
- change in yellowness index (ΔYI) expressed by the following General Equation 1 is 0.5 or less:
- ΔYI=YI(340° C.)−YI(285° C.) [General Equation 1]
- wherein YI is the yellowness index value measured according to ASTM D1925 at the corresponding temperature.
9 more elements
Dependencies are inferred from the claim text.