G - Physics – 03 – C
Patent
G - Physics
03
C
96/26
G03C 8/52 (2006.01)
Patent
CA 1184055
ABSTRACT OF THE DISCLOSURE Timing layers of reduced permeability for alkali are prepared by casting a dispersion of a cross-linked copolymer of formula I in an organic solvent. Such barrier layers are useful in photographic materials for the dye diffusion transfer process, e.g. if used in combination with an acid polymer layer as a so- called neutralization system. (-S-)x (-M-)y (-V-)z (I) in which S represents polymerized units of monomers containing carboxylic acid, sulphonic acid or phosphonic acid groups M represents polymerized units of monomers free from acid groups V represents polymerized units of cross-linking monomers x,y,z represent the percentage contents of the polymerized monomers as follows x = 2 to 15 mole % y - 75 to 97.5 mole % z = 0.5 to 10 mole %.
386366
Helling Gunter
Krafft Werner
Matschke Gunther
Agfa-Gevaert Aktiengesellschaft
Fetherstonhaugh & Co.
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