Optical recording medium containing polymethine compound

Details Optical recording medium containing polymethine compound Optical recording medium containing polymethine compound

1992-04-27

1993-12-21

Ryan, Patrick J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428913, 346 76L, 369288, 430945, B32B 302

Patent

active

052719790

ABSTRACT:
An optical recording medium including a recording layer containing a polymethine compound which can be expressed by the following formula: ##STR1## where R.sub.1 and R.sub.2 represent aryl groups substituted by alkyl groups, or aryl groups substituted by alkoxy groups; R.sub.3 and R.sub.4 represent substituted or unsubstituted aryl groups, substituted or unsubstituted heterocyclic groups, or substituted or unsubstituted styryl groups; m is 0, 1 or 2; and X.crclbar. is an anion.

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patent: 5079128 (1992-01-01), Katagiri et al.
patent: 5108873 (1992-04-01), Fukui et al.
Schmidt et al., Annalen der Chemie, vol. 623 (1959) 204:16.
Helvetica Chimica Acta, vol. 24 (1943) 369:88.
Tuemmler et al., J. Am. Chem. Soc., vol. 80 (1958) 3772:7.
Bartolini et al., Optical Engineering, vol. 15, No. 2 (1976) 99:108.

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