Photochromic spirooxazine compounds, their use in the field of o

Details Photochromic spirooxazine compounds, their use in the field of o Photochromic spirooxazine compounds, their use in the field of o

1997-09-09

2000-02-01

Raymond, Richard L.

Compositions

Light transmission modifying compositions

Displaying color change

544 71, C07D49810, C07D49820

Patent

active

060199148

ABSTRACT:
The new photochromic compounds according to the invention, of the spiro[indoline-[2,3']-benzoxazine] type, include at least one electron-withdrawing group attached to the benzoxazine structure in 5' or 6' position by a chain containing at least one ethylenic double bond.
Application to ophthalmic optics.

REFERENCES:
patent: 4931220 (1990-06-01), Haynes et al.
patent: 5000878 (1991-03-01), Chu
patent: 5114621 (1992-05-01), Guglielmetti et al.
patent: 5139707 (1992-08-01), Guglielmetti et al.
patent: 5446150 (1995-08-01), Rickwood et al.
patent: 5446151 (1995-08-01), Rickwood et al.
Lareginie et al., Journal of Physical Organic Chemistry, vol. 9, No. 5, pp. 262-264, May 1996.

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