Invention Grant
US07863354B2 Spectacle lens 有权
眼镜镜片

Spectacle lens
Abstract:
A resin composition which contains polycarbonate resin, does not transmit a wavelength of 385 nm substantially and has a high total light transmittance and excellent heat resistance.The resin composition comprises (1) polycarbonate resin, (2) an ultraviolet absorber (A) such as 2-(2H-benzotriazol-2-yl)-p-cresol, (3) an ultraviolet absorber (B) such as 2,2′-methylenebis[4-(1,1,3,3-tetramethylbutyl)-6-(2H-benzotriazol-2-yl)phenol] and (4) at least one compound (C) represented by the following formula (I) or (II) and is used for spectacle lenses. (R1—S—CH2—CH2—C(O)O—CH2—)4C  (I) (R2—O—C(O)—CH2—CH2—)2S  (II) (wherein R1 is an alkyl group having 4 to 20 carbon atoms, and R2 is an alkyl group having 6 to 22 carbon atoms.)
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