Spectacle lens

Details Spectacle lens Spectacle lens

1997-01-23

1999-09-14

Kiliman, Leszek

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428334, 428412, 524 84, 2641761, 264171, 26433121, B32B 516, B32S 2736

Patent

active

059520965

ABSTRACT:
A spectacle lens formed from a resin composition which consists essentially of (1) 100 parts by weight of a polycarbonate resin; (2) 0.05 to 0.5 part by weight of an ultraviolet absorber (A) having a maximum absorption in a wavelenght of 300 to 345 nm when measured in a chloroform solution; and (3) 0.01 to 0.3 part by weight of an ultraviolet absorber (B) having a maximum absorption in a wavelenght of 346 to 400 nm when measured in a chloroform solution. The spectacle lens has excellent impact resistance and transparency and high absorbing power for ultraviolet light having a specific wavelength.

REFERENCES:
patent: 4576870 (1986-03-01), Liebler et al.
patent: 4812498 (1989-03-01), Nakahara
patent: 5108835 (1992-04-01), Hahnsen

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