Compositions – Light transmission modifying compositions – Displaying color change
Patent
1992-02-27
1993-02-16
Stoll, Robert L.
Compositions
Light transmission modifying compositions
Displaying color change
252583, 252589, 544 71, G02B 523, G02F 100, F21V 904, C07D26500
Patent
active
051868679
ABSTRACT:
New compounds of the spiro-indoline-oxazine class possessing photochromatic and photosensitizing charecteristics are definable by the general formula (I): ##STR1## where the substituents R, R.sup.1 -R.sup.7 and A are as defined in the description. The process for preparing the compounds (I) is described, as is their use as photochromic agents able to confer photochromatic characteristics on the articles in which they are incorporated, and as photosensitizing agents.
REFERENCES:
patent: 4367170 (1983-01-01), Uhlmann
patent: 4784474 (1988-11-01), Yamamoto et al.
patent: 4785097 (1988-11-01), Kwak
patent: 4792224 (1988-12-01), Kwiatowski et al.
patent: 4816584 (1989-03-01), Kwak et al.
patent: 4913544 (1990-04-01), Rickwood et al.
patent: 4931219 (1990-06-01), Kwiatkowski et al.
patent: 4962013 (1990-10-01), Tateoka et al.
patent: 4968454 (1990-11-01), Crano et al.
patent: 5021196 (1991-06-01), Crano et al.
Tsugio Okudaira, Chemical Abs., vol. 113, No. 12, p. 639, abstract No. 106503h, Bis[spiro(indoinonaphthoxanie)] Compounds as Photochromic Materials with High Heat Resistance.
Allegrini Pietro
Castaldi Graziano
Crisci Luciana
Renzi Fiorenzo
Enichem Synthesis S.p.A.
Stoll Robert L.
Tucker Philip
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