Process for preparation of light-sensitive material containing m

Details Process for preparation of light-sensitive material containing m Process for preparation of light-sensitive material containing m

1991-12-06

1993-07-13

McCamish, Marion E.

Radiation imagery chemistry: process, composition, or product th

Microcapsule, process, composition, or product

430203, 430281, 430569, 430935, 264 43, 264 47, G03C 172

Patent

active

052272745

ABSTRACT:
A process for preparation of a light-sensitive material containing microcapsules is disclosed. The light-sensitive material comprises a light-sensitive layer provided on a support. The microcapsules are dispersed in the light-sensitive layer. The process of the present invention comprises the steps of: (1) mixing a silver halide emulsion and the reducing agent or the photopolymerization initiator with the polymerizable compound to prepare a light-sensitive composition; (2) emulsifying the composition in an aqueous medium to prepare an aqueous emulsion; (3) forming a shell around the droplets of the composition contained in the aqueous emulsion to prepare a microcapsule dispersion; (4) coagulating the aqueous medium to set the microcapsule dispersion; (5) storing the set microcapsule dispersion; (6) melting the aqueous medium to prepare a coating solution of the light-sensitive layer; and (7) coating the solution on the support. Between the steps (2) and (3), the process preferably further contains the steps of: (a) precipitating the droplets of the light-sensitive composition in the aqueous emulsion; (b) removing at least 50% of the supernatant medium from the droplets; and (c) emulsifying the droplets in an aqueous medium again.

REFERENCES:
patent: 4871641 (1989-10-01), Kakimi
patent: 5039589 (1991-08-01), Takahashi

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