Photochromic lens

Details Photochromic lens Photochromic lens

1986-07-07

1988-07-12

Ives, P. C.

Stock material or miscellaneous articles

Composite

Of polycarbonate

428413, 428447, 4284758, 428519, 428522, 428524, 427164, 351166, 350409, B32B 2736, G02B 523, C07D49810

Patent

active

047569735

ABSTRACT:
A photochromic lens is composed of a lens member made of a lens resin; and a photochromic layer applied on at least one side of the lens member and formed of a resin of a three-dimensional network structure. The layer-forming resin contains a spirooxazine compound represented by the following general formula (I): ##STR1## wherein R.sub.1 means a hydrogen or halogen atom or a cyano, C.sub.1-6 alkyl or C.sub.1-6 alkoxy group, and R.sub.2 denotes a C.sub.1-6 alkyl group, --CH.sub.2).sub.n COOH, --CH.sub.2).sub.n CN, substituted arylalkyl group or --CH.sub.2).sub.n COOR in which R is a C.sub.1-6 alkyl group and n stands for an integer of 1-4. The layer-forming resin may additionally contain a phenol resin and/or a phenolic compound. A hard coat layer may optionally be applied on the surface of the photochromic layer.

REFERENCES:
patent: 3562172 (1971-02-01), Ono et al.
patent: 4289497 (1981-09-01), Hovey
patent: 4342668 (1982-08-01), Hovey et al.
patent: 4343857 (1982-08-01), Uram, Jr.
patent: 4367170 (1983-01-01), Uhlmann et al.
patent: 4556605 (1985-12-01), Mogami et al.

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