Use of .alpha.,.alpha.-bis(dialkylaminobenzylidene) ketone dyes

Details Use of .alpha.,.alpha.-bis(dialkylaminobenzylidene) ketone dyes Use of .alpha.,.alpha.-bis(dialkylaminobenzylidene) ketone dyes

1982-02-11

1983-11-15

Hess, Bruce H.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

346 76L, 3461351, 369272, 369288, 427146, 427384, 428195, 428199, 428207, 428209, 428210, 428411, 428913, 430945, B41M 524, G01D 1534

Patent

active

044156219

ABSTRACT:
Dyes conforming to the structure: ##STR1## wherein R.sub.1 is (CH.sub.2).sub.n or ##STR2## n is an integer from 0-5 and each R is independently selected from the group consisting of straight- and branched-chain alkyl groups of about 1-6 carbon atoms, have a high extinction coefficient at 488 nm and are compatible with common binders such as cellulose-nitrate. These dyes are useful in deformable recording compositions for optical recording elements, e.g., video discs.

REFERENCES:
J. Am. Chem. Soc., 78, 614-622, (1956).
J. Am. Chem. Soc., 79, 1482-1485, (1957).
James, Photographic Emulsions Recent Development, Noyes Data Corp., Park Ridge, N.J., 1973, pp. 1 and 63.

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