Aqueous developable negative acting photosensitive...

Details Aqueous developable negative acting photosensitive... Aqueous developable negative acting photosensitive...

G - Physics

03

F

G03F 7/00 (2006.01) G03C 1/54 (2006.01) G03F 7/004 (2006.01) G03F 7/016 (2006.01) G03F 7/105 (2006.01) G03F 7/26 (2006.01)

Patent

CA 2191055

A colorant dispersion having a pigment, a solvent composition of a C1-C8 aliphatic alcohol, a mono- or di- C1-C8 alkylene glycol C1-C8 alkyl ether, or a cyclic ketone; and an aqueous alkaline soluble or swellable polymeric compound which is the reaction product of a hydroxy containing polymer and an anhydride in the presence of a catalytic amount of a tertiary amine catalyst. The pigment and the polymeric compound are present in a high relative weight ratio of from about .75:1.25 to about 1.25:.75. An admixture of the dispersion, a light sensitive component diazonium compound or photopolymerizable composition and an aqueous alkaline soluble or swellable polymeric binder, when coated and dried onto a substrate, forms a photographic element, which when imagewise exposed and developed has an exceptionally high contrast between image and removed non-image areas.

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