Photochromic benzothioxanthone oxides, process for their prepara

Details Photochromic benzothioxanthone oxides, process for their prepara Photochromic benzothioxanthone oxides, process for their prepara

1992-09-17

1993-07-06

Morgan, Kriellion S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524494, C08K 545, C08K 340

Patent

active

052255255

ABSTRACT:
Compounds of formula I or III or mixtures thereof ##STR1## wherein R is unsubstituted C.sub.6 -C.sub.14 aryl or C.sub.6 -C.sub.14 aryl which is substituted by C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy, C.sub.1 -C.sub.12 alkylthio, phenyl, benzyl, --CN, --CF.sub.3, halogen or --COOR.sub.3, x is 1 or 2, and R.sub.1 is H, linear or branched C.sub.1 -C.sub.12 alkyl, C.sub.2 -C.sub.12 alkenyl or C.sub.2 -C.sub.12 alkynyl, C.sub.7 -C.sub.16 aralkyl, C.sub.8 -C.sub.16 alkaralkyl, --CH.sub.2 COOR.sub.3 or C.sub.1 -C.sub.12 acyl, wherein R.sub.3 is H, C.sub.1 -C.sub.18 alkyl, cyclohexyl, cyclopentyl, phenyl, C.sub.1 -C.sub.12 alkylphenyl, benzyl or C.sub.1 -C.sub.12 alkylbenzyl, are reversible photochromic systems which can be used for contrast formation, light absorption or for the reversible optical storage of information.

REFERENCES:
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patent: 3410868 (1968-11-01), Harris et al.
patent: 4010211 (1977-03-01), Preston et al.
patent: 4681950 (1987-07-01), Fischer et al.
Zhurnal Organicheskoi Khimi, vol. 7, No. 11 pp. 2413-2415 (1971).
Zhurnal Organicheskoi Khimir, vol. 16, No. 9 pp. 1938-1945 (1980).
Chem. Abst. vol. 94:47012m. p. 548 (1981), Y. Gerasimenta et al.
Chem. Abstr. vol. 100:8573t p. 100 (1984) Y. Gerasimenta et al.

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