Rupturable fluid container and elements containing same

In a container useful for holding fluids, said container comprising:

• a pair of opposed walls marginally sealed together over a substantial area to provide an internal cavity adapted to retain said fluid, at least one of said walls being flexible and deformable, the internal surfaces of said walls bounding said cavity comprising a polymer which resists deterioration by the action of said fluid, said opposed walls being marginally sealed together over a first part of said area, and a polymeric sealing composition interposed between said opposed walls over a second part of said area forming a seal of less strength than over said first part of said area, whereby said seal of less strength preferentially bursts along said second part of said area upon the application of pressure to said container, the improvement wherein:
• said sealing composition comprises a copolymer of
• (a) at least about 50 percent, by weight, of a polymerizable monomer having the formula (I):
• ##STR9## wherein n is an integer of from 0 to 3;
• and each of R.sup.1 and R.sup.2 is hydrogen;
• with
• (b) a copolymerizable monomer having the formula (II):
• ##STR10## wherein R.sup.3 is alkyl of 1 to 12 carbon atoms, said copolymer having a glass transition temperature of at least about 80.degree. C.

In a photographic film unit comprising a support and a container useful for holding fluid photographic processing material, said container comprising:

• a pair of opposed walls marginally sealed together over a substantial area to provide an internal cavity adapted to retain said processing material, at least one of said walls being flexible and deformable, said opposed walls being marginally sealed together over a first part of said area, and a polymeric sealing composition interposed between said opposed walls over a second part of said area forming a seal of less strength than over said first part of said area, whereby said seal of less strength preferentially bursts along said second part of said area upon the application of pressure to said container, the improvement wherein:
• said sealing composition comprises a copolymer of
• (a) at least about 50 percent, by weight, of a polymerizable monomer having the formula (I):
• ##STR11## wherein n is an integer of from 0 to 3;
• R.sup.1 is hydrogen or alkyl;
• and R.sup.2 is hydrogen, alkyl or phenyl;
• with
• (b) a copolymerizable monomer having the formula (II):
• ##STR12## wherein R.sup.3 is alkyl, said copolymer having a glass transition temperature of at least about 80.degree. C.

In a photographic film unit comprising:

• A. a support having thereon a photosensitive silver halide layer;
• B. an image-receiving layer;
• C. a neutralizing layer for neutralizing an alkaline processing material, and
• D. a container, having an alkaline processing material therein, said container comprising:
• a pair of opposed walls marginally sealed together over a substantial area to provide an internal cavity holding said processing material, at least one of said walls being flexible and deformable, the internal surfaces of said walls bounding said cavity comprising a polymer which resists deterioration by the action of said processing material, said opposed walls being marginally sealed together over a first part of said area, and a polymeric sealing composition interposed between said opposed walls over a second part of said area forming a seal of less strength than over said first part of said area, whereby said seal of less strength preferentially bursts along said second part of said area upon the application of pressure to said container, the improvement wherein:
• said sealing composition comprises a copolymer of
• (a) at least about 50 percent, by weight, of a polymerizable monomer having the formula (I):
• ##STR13## wherein n is an integer of from 0 to 3;
• R.sup.1 is hydrogen or alkyl;
• and R.sup.2 is hydrogen, alkyl or phenyl;
• with
• (b) a copolymerizable monomer having the formula (II):
• ##STR14## wherein R.sup.3 is alkyl, said copolymer having a glass transition temperature of at least about 80.degree. C.