Imaging system employing encapsulated radiation sensitive...

G - Physics – 03 – F

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G03F 7/029 (2006.01) G03F 7/00 (2006.01)

Patent

CA 2319603

A photosensitive material comprising a support having a layer of microcapsules on one surface thereof, the microcapsules having an image-forming agent associated therewith and containing an internal phase including a photohardenable composition, the composition comprising a free radical addition polymerizable or crosslinkable compound and complex of an infrared sensitive cationic dye and a boranyl anion being capable of absorbing infrared radiation and producing free radicals which initiate free radical polymerization or crosslinking of the polymerizable or crosslinkable compound.

La présente invention concerne une matière photosensible comprenant un support qui contient sur sa surface une couche de microcapsules auxquelles est associé un agent imageur qui renferme une phase interne comportant une composition photodurcissable. Cette composition comprend un composé polymérisable et réticulable d'addition de radicaux libres, un complexe constitué par un colorant cationique sensible aux infrarouges et un anion boranyle capable d'absorber le rayonnement infrarouge et produire des radicaux libres qui déclenchent la polymérisation ou la réticulation radicalaires du composé polymérisable et réticulable.

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