Methine dyes and optical recording medium containing same

Details Methine dyes and optical recording medium containing same Methine dyes and optical recording medium containing same

1990-08-07

1992-03-03

Bowers, Jr., Charles L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544295, 544300, 430270, 430945, C09B 2308, G11B 724

Patent

active

050934929

ABSTRACT:
Methine dyes of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, X, Y and the rings A and B each have specific meanings, and methine dyes obtainable by reacting an organic mono- or polyisocyanate with such a methine dye of the abovementioned formal where only the radicals R.sup.1 and/and R.sup.4 have a group reacting with an organic mono- or polyisocyanate are useful in optical recording media.

REFERENCES:
patent: 2955939 (1960-10-01), Brooker et al.
patent: 4551413 (1985-11-01), Bell
patent: 4751309 (1988-06-01), Daltrozzo et al.
patent: 4861796 (1989-08-01), Hulme-Lowe et al.
J. Vac. Sci. Technol., vol. 18, No. 1, Jan./Feb. 1981, pp. 92-99; D. G. Howe, et al.

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