Recording materials for vesicular imaging
AssigneeImperial Chemical Industries PLC
InventorsJohn A. Pope, Stuart C. Rennison, Ronald J. Stacey
Life of this patent
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Abstract
Vesicular recording materials incorporate a sensitized layer comprising, as vehicle for the sensitizing agent, a quaternized polyelectrolyte, e.g. preferably polymers of dimethylamino ethyl methacrylate. The water sensitivity of the preferred polymers is reduced by copolymerisation with insolubilizing comonomers such as itaconic acid.
Claims12
A recording material suitable for vesicular imaging, which consists essentially of a polymeric vehicle and dispersed uniformly therein a sensitising agent which releases a vesicle-forming gas upon exposure to light so as to provide a latent gas image in the polymeric vehicle, said polymeric vehicle consisting of a polyelectrolyte having a nitrogen permeability constant in the range 1.times.10.sup.-17 to 1.times.10.sup.-10 and being softenable upon heating to permit the gas released by the sensitising agent in the light-struck areas to form light-scattering or reflecting vesicles therein.
A recording material suitable for vesicular imaging, which consists essentially of a polymeric vehicle and dispersed uniformly therein a sensitising agent which releases a vesicle-forming gas upon exposure to light, said polymeric vehicle consisting essentially of a quaternised homopolymer or copolymer of an amino acrylate having a nitrogen permeability constant in the range 1.times.10.sup.-17 to 1.times.10.sup.-10 and being softenable upon heating to permit the gas released by the sensitising agent in the light-struck areas to form light-scattering or reflecting vesicles therein.
Dependencies are inferred from the claim text.