(19)
(11) EP 0 034 952 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.12.1982 Bulletin 1982/50

(43) Date of publication A2:
02.09.1981 Bulletin 1981/35

(21) Application number: 81300784

(22) Date of filing: 25.02.1981
(84) Designated Contracting States:
BE DE FR GB NL

(30) Priority: 25.02.1980 US 124189
05.06.1980 US 156712

(71) Applicant: EASTMAN KODAK COMPANY (a New Jersey corporation)
 ()

(72) Inventors:
  • Lelental, Mark
     ()
  • Sutton, Richard Calvin
     ()

   


(54) Heat-developable electrically activatable recording material


(57) A room light-handleable recording material comprises an electrically conductive support having thereon in sequence (a) a polymeric electrically active conductive (EAC) layer, a recording layer (b) comprising a dye-forming coupler and an oxidation-reduction combination comprising an organic silver salt and a reducing agent having an oxidation product which reacts with the coupler to form image dye. Imagewise passage of currentthrough the material, possibly achieved by applying a potential across the material and an exposed photoconductive layer in contact therewith, produces a heat-developable latent image. Higher current sensitivity of this material is obtained by using as the organic silver salt a salt of a mercapto-1,2,4-triazole derivative and as the polymerforthe EAC layera vinyl addition polymer of the structure:

wherein R' is hydrogen or methyl, R2 is aryl or R3COO- where R3 is alkyl or aryl, each X is bromine or chlorine, and n and p are such that the polymer contains from 50 to 85% by weight of the halogen-containing unit.







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