Spectacle lens

专利名称：Spectacle lens发明人：Keizo Ikari申请号：US11597404申请日：20050524

公开号：US20070228587A1公开日：20071004

摘要：There is provided a spectacle lens formed from a polycarbonate resincomposition comprising, based on (1) 100 parts by weight of polycarbonate resin(component a), (2) 0.1 to 0.5 parts by weight of at least one ultraviolet absorber(component b) selected from the group consisting of 2,2′-methylenebis[4-(1,1,3,3-tetramethylbutyl)-6-(2 H-benzotriazole-2-yl)phenol] and 2-[2-hydroxy-3,5-bis(α,α-dimethylbenzyl)phenyl]-2H-benzotriazole, (3) 0.005 to 2 parts by weight of moldreleasing agent (component c) which substantially comprises a full ester of an aliphatictetrahydric to octahydric alcohol having 5 to 30 carbon atoms and an aliphatic carboxylicacid having 10 to 22 carbon atoms and which has an acid value of 4 to 20, and (4) 0.001 to0.2 parts by weight of phosphorus-based stabilizer (component d). According to thepresent invention, there is provided a spectacle lens formed from a polycarbonate resincomposition which has molding heat resistance in molding of the spectacle lens byinjection molding or extrusion compression molding, especially, molding heat resistancewhich allows the composition to endure long-term high-temperature retention, shows alittle change in hue even if a heat history is added and has good mold releasability.Further, according to the present invention, there is provided a spectacle lens whichsubstantially does not allow ultraviolet radiation of 385 nm to penetrate therethrough

and has high total light transmittance and excellent transparency.

申请人：Keizo Ikari

地址：Chiyoda-ku, Tokyo JP

国籍：JP

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