Photographic element for color diffusion transfer process having

Details Photographic element for color diffusion transfer process having Photographic element for color diffusion transfer process having

1979-04-19

1981-03-17

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Transfer procedure between image and image layer, image...

Diffusion transfer process, element, or identified image...

428500, 428515, 428522, 430227, 430463, 430644, G03C 148, G03C 140, B32B 2708, B32B 2730

Patent

active

042568277

ABSTRACT:
In a photographic element for the color diffusion transfer process including a neutralizing system for reducing the pH of an aqueous alkaline developing solution which comprises a neutralizing layer and a timing layer, wherein the timing layer is positioned on or under the neutralizing layer in direct or indirect contact therewith such that the aqueous alkaline developing solution reaches the neutralizing layer through the timing layer, the improvement which comprises the timing layer comprising a polymer latex which is produced by emulsion polymerization of each of at least one monomer selected from the group consisting of monomers of Group (A), at least one monomer selected from the group consisting of monomers of Group (B) and at least one monomer selected from the group consisting of monomers of Group (C), wherein said Group (A) monomers are represented by the following formula (I): ##STR1## wherein R represents a hydrogen atom or a methyl group; T represents a hydrogen atom or an aliphatic group; Q represents a --CH.sub.2 OCOR.sub.0 group, ##STR2## a --CH.sub.2 OR.sub.2 group, ##STR3## wherein R.sub.0 represents an aliphatic group or an aryl group; R.sub.1a and R.sub.1b, which may be the same or different, each represents an aliphatic group or R.sub.1a and R.sub.1b combine to form a ring; R.sub.2 represents a hydrogen atom or an aliphatic group; R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7, which may be the same or different, each represents a hydrogen atom or a --CH.sub.2 OR.sub.2 group provided that all of R.sub.3 to R.sub.7 do not represent hydrogen atoms at the same time; and W represents an atomic group necessary to form a ring together with the --N--CO-- linkage; and

REFERENCES:
patent: 3421893 (1969-01-01), Taylor
patent: 3785815 (1974-01-01), Autges et al.
patent: 4056394 (1977-11-01), Hannie

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