Radiation imagery chemistry: process – composition – or product th – Dye image from radiation sensitive dye or dye former by dry... – Composition or product
Patent
1984-10-18
1986-01-07
Louie, Won H.
Radiation imagery chemistry: process, composition, or product th
Dye image from radiation sensitive dye or dye former by dry...
Composition or product
430341, 430338, G03C 152
Patent
active
045634157
ABSTRACT:
Thermographic composition comprising a leuco dye, a nitrate salt, and, optionally, an acid and stabilizing compound. The leuco dye contains a phenazine nucleus with naphthoyl substitutents on the 10-position and, optionally on one or both of the 3- and 7-positions through an amino group.
In their oxidized form, the leuco dyes of this invention provide access to a range of red and magenta colors which exhibit greater stability when subjected to light and temperatures characteristic of the stage of overhead projectors than that exhibited by previously available leuco dyes of this color range.
REFERENCES:
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patent: 2783227 (1957-02-01), Adams et al.
patent: 2783228 (1957-02-01), Adams et al.
patent: 2909520 (1959-10-01), Buc
patent: 4379835 (1983-04-01), Lowrey et al.
patent: 4386154 (1983-05-01), Smith et al.
Brown Harvey A.
Leichter Louis M.
Miller Alan G.
Louie Won H.
Minnesota Mining and Manufacturing Company
Sell Donald M.
Smith James A.
Weinstein David L.
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