Diffusion transfer color process using lactone or sultone ring c

Details Diffusion transfer color process using lactone or sultone ring c Diffusion transfer color process using lactone or sultone ring c

1974-11-01

1977-07-19

Klein, David

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 3, 96 563, 96 564, 96 565, 96 566, 96 74, 96 77, 96100, G03C 700, G03C 554, G03C 140, G03C 171

Patent

active

040366430

ABSTRACT:
Lipophilic non-diffusing color formers yielding diffusing dyes are employed in color transfer systems to provide improved diffusion and better quality of color. The color formers are two-equivalent couplers having in the coupling position acyloxy, or sulfonyloxy groups which complete a lactone or sultone ring, respectively, and are stable to hydrolysis under alkaline development conditions. Color-providing material is created by a reaction which opens the lactone or sultone intramolecular ring after the non-diffusing color former reacts with the oxidized color developer molecule. Examples are given of intramolecular 2-equivalent couplers which react with the developer to give yellow, magenta and cyan dyes. The 2-equivalent color formers are unique since they have an intramolecular lactone or sultone ring which opens under oxidative coupling conditions to yield the diffusible yellow, magenta and cyan dyes.

REFERENCES:
patent: T900012 (1972-07-01), Williams
patent: 2673800 (1954-03-01), Meeussen et al.
patent: 3311476 (1967-03-01), Loria
patent: 3320063 (1967-05-01), Bloom
patent: 3415652 (1968-12-01), Porter
patent: 3443940 (1969-05-01), Bloom et al.
patent: 3447928 (1969-06-01), Loria
patent: 3647436 (1972-03-01), Bosh
patent: 3837854 (1974-09-01), Waxman et al.

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