Spectacle lens

Details Spectacle lens Spectacle lens

2011-01-04

2011-01-04

Sanders, Kriellion A (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S305000

Reexamination Certificate

active

07863354

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.in-line-formulae description="In-line Formulae" end="lead"?(R1—S—CH2—CH2—C(O)O—CH2—)4C  (I)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?(R2—O—C(O)—CH2—CH2—)2S  (II)in-line-formulae description="In-line Formulae" end="tail"?(wherein R1is an alkyl group having 4 to 20 carbon atoms, and R2is an alkyl group having 6 to 22 carbon atoms.)

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Supplementary European Search Report issued Nov. 17, 2009 in European application corresponding to present US application.

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