Photographic element for color diffusion transfer process

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

1979-09-14

1981-02-10

Brown, J. Travis

Radiation imagery chemistry: process, composition, or product th

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

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

430216, 430226, G03C 140, G03C 148

Patent

active

042502438

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 (1) each of (A) at least one monomer selected from the group consisting of ethylene-type monomers having at least a free carboxylic acid group, a free sulfonic acid group or a free phosphoric acid group or a salt thereof, (B) at least one monomer selected from the group consisting of monomers represented by the following general formula (1) ##STR1## wherein X is a hydrogen atom, a methyl group or a --COOR.sup.1 group; Y is a hydrogen atom, a methyl group or a --(CH.sub.2).sub.n COOR.sup.2 group; Z is a monocyclic or bicyclic aryl group having 6 to 12 carbon atoms, a --COOR.sup.3 group or a ##STR2## R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, each represents a saturated aliphatic group having 1 to 12 carbon atoms or a monocyclic or bicyclic aryl group having 6 to 12 carbon atoms; and n is an integer of 0 to 3, and (C) at least one monomer selected from the group consisting of ethylene-type monomers having at least one glycidyl group or (2) each of (A) at least one monomer selected from the group consisting of the ethylene-type monomers described in (A) above, (B) at least one monomer selected from the group consisting of monomers represented by the general formula (I) above, (C) at least one monomer selected from the group consisting of the ethylene type monomers described in (C) above, and (D) at least one monomer selected from the group consisting of monofunctional or polyfunctional unsaturated monomers other than those monomers described in (A), (B) and (C) above which are copolymerizable with the monomers described in (A), (B) and (C) above and selected from the group consisting of acrylamides, methacrylamides, vinyl ethers, vinyl ketones, allyl compounds, olefins, vinyl heterocyclic compounds, unsaturated nitriles and polyfunctional monomers, and the polymer latex layer per se has the water permeability.

REFERENCES:
patent: 3455686 (1969-07-01), Farney et al.
patent: 3575701 (1971-04-01), Taylor
patent: 3592645 (1971-07-01), Weyerts et al.
patent: 3856522 (1974-12-01), George et al.
patent: 4054722 (1977-10-01), Yoshida et al.
patent: 4123275 (1978-10-01), Karino et al.

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