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US 4,357,408 AGranted
Acidic adhesive compositions and self-processing photographic products containing same
AssigneeEastman Kodak Company
InventorsRobert R. Rose, Carl H. Eldredge
Life of this patent
Estimating the term…
Abstract
Adhesive compositions are disclosed which are particularly useful as mask adhesives in instant photographic products. These adhesives provide high strength permanent bonds while greatly improving border quality around image areas after imagewise exposure and development. These adhesive compositions comprise a polymeric acidic component having at least 3 milliequivalents of acid per gram of polymer, and a substantially immobile, blocked photographic development restrainer or a substantially immobile, blocked competing photographic developer.
Claims14
An image-recording element comprising:
- (1) a support,
- (2) a plurality of layers including an image-recording layer having an image area adapted to be processed by an alkaline processing composition, and
- (3) a mask providing an aperture adapted to receive said alkaline processing composition and a border which defines said image area,
- said mask being permanently bonded to said image-recording layer by a high strength adhesive composition which is disposed within said border and is subject to contact with said alkaline processing composition,
- said adhesive composition comprising:
- a polymeric acidic component adapted to neutralize said alkaline processing composition in said border and having at least 3 milliequivalents of acid per gram of said component, and a substantially immobile, blocked photographic development restrainer or a substantially immobile, blocked competing photographic developer.
3 more elements
A self-processing film unit comprising:
- (1) a support,
- (2) a plurality of layers including an image-recording layer having an image area adapted to be processed by an alkaline processing composition and an image-receiving layer, and
- (3) a mask providing an aperture adapted to receive said alkaline processing composition and a border which defines said image area,
- said mask being permanently bonded to said image-recording layer by a high strength adhesive composition which is disposed within said border and is subject to contact with said alkaline processing composition,
- said adhesive composition comprising:
- a polymeric acidic component adapted to neutralize said alkaline processing composition in said border and having at least 3 milliequivalents of acid per gram of said component, and a substantially immobile, blocked photographic development restrainer or a substantially immobile, blocked competing photographic developer.
3 more elements
A self-processing photographic film unit comprising:
- (1) a photosensitive element having an image area and comprising a transparent support having thereon the following layers in sequence:
- an image-receiving layer;
- a light-reflective layer;
- an opaque layer;
- a red-sensitive silver halide emulsion layer having a cyan dye-providing material associated therewith;
- a green-sensitive silver halide emulsion layer having a magenta dye-providing material associated therewith;
- and a blue-sensitive silver halide emulsion having a yellow dye-providing material associated therewith;
- (2) a cover sheet superposed over said blue-sensitive silver halide emulsion layer and comprising a transparent support having thereon a neutralizing layer and a timing layer;
- (3) a rupturable pouch containing an alkaline processing composition;
- and
- (4) a mask between said photosensitive element and said cover sheet, said mask providing an aperture adapted to receive said alkaline processing composition and a border which defines said image area of said photosensitive element,
- said mask being permanently bonded to said photosensitive element by a high strength adhesive composition which is disposed within said border and is subject to contact with said alkaline processing composition,
- said adhesive composition comprising:
- a polymeric acidic component adapted to neutralize said alkaline processing composition in said border and having at least 3 milliequivalents of acid per gram of said component, and a substantially immobile, blocked photographic development restrainer or a substantially immobile, blocked competing photographic developer.
11 more elements
Dependencies are inferred from the claim text.