Radiation imagery chemistry: process – composition – or product th – Diazo reproduction – process – composition – or product – Composition or product which contains radiation sensitive...
Patent
1980-02-15
1981-09-15
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Diazo reproduction, process, composition, or product
Composition or product which contains radiation sensitive...
430147, 430171, 430179, 430180, 430181, 430183, 430163, 430150, 430151, 430339, 430344, G03C 154, G03C 158, G03C 160
Patent
active
042898390
ABSTRACT:
Negative-working diazography material is comprised of (i) at least one diazonium compound, (ii) at least one acid labile enolic, preferably phenolic blocked-coupler adapted to be converted in the presence of acid to an active azo-coupling component, (iii) at least one light-sensitive acid progenitor, and (iv) at least one carboxylic acid anhydride. The diazonium compound can itself concurrently function as the acid progenitor, e.g., when complexed with a Lewis acid. Upon imagewise exposure to light, acid catalyst is photochemically liberated, thus unblocking coupler molecules such that dye image forms under alkaline developing conditions only where the material has been irradiated. Under alkaline developing conditions, the anhydride reacts to render the unused diazo component remaining in the unexposed areas inactive.
REFERENCES:
patent: 2381984 (1945-08-01), Reichel
patent: 2516931 (1950-08-01), Von Glahn et al.
patent: 3303028 (1967-02-01), Aebi et al.
patent: 3499760 (1970-03-01), Amariti et al.
patent: 3695885 (1972-10-01), Maryama
patent: 3708296 (1973-01-01), Schlesinger
patent: 3765895 (1973-10-01), Fox
patent: 3769018 (1973-10-01), Hectors
patent: 3899335 (1975-08-01), Przezdziecki
patent: 3960684 (1976-06-01), Feinberg
patent: 3976491 (1976-08-01), Desjerlais
Kosar, J., Photographic Science and Engineering, vol. 5, No. 4, 8/1961, pp. 239-243.
Noller, C. R., "Textbook of Organic Chemistry", 2nd Ed., W. B. Saunders Co., 1951, p. 104.
Bowers Jr. Charles L.
James River Graphics Inc.
LandOfFree
Negative image diazography formulation with acid labile coupler, does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Negative image diazography formulation with acid labile coupler,, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Negative image diazography formulation with acid labile coupler, will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-391415