Heat developable photographic materials and process

A heat developable and heat stabilizable photographic element comprising a support having thereon a layer comprising (a) photographic silver bromoiodide, (b) a development restrainer represented by the formula:

• ##STR30## (c) a toning concentration of an image toner represented by the formula:
• ##STR31## (d) an auxiliary activator-stabilizer precursor represented by the formula:
• ##STR32## (e) an activating and stabilizing concentration of an activator-stabilizer precursor represented by the formula:
• ##STR33## (f) a first silver halide developing agent consisting essentially of 2-(n-propyl)-4,5,6-trihydropyrimidine, (g) a second silver halide developing agent consisting essentially of 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone, and (h) a gelatino binder.

A heat developable and heat stabilizable photographic composition comprising (a) photographic silver bromoiodide, (b) a development restrainer represented by the formula:

• ##STR35## (c) a toning concentration of an image toner represented by the formula:
• ##STR36## (d) an auxiliary activator-stabilizer precursor represented by the formula:
• ##STR37## (e) an activating and stabilizing concentration of an activator-stabilizer precursor represented by the formula:
• ##STR38## (f) a first silver halide developing agent consisting essentially of 2-(n-propyl)-4,5,6-trihydropyrimidine, (g) a second silver halide developing agent consisting essentially of 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone, and (h) a gelatino binder.

A heat developable and heat stabilizable photographic element comprising a support having thereon (a) a photographic silver salt, (b) a photographic silver salt developing agent, (c) a binder and (d) an activating and stabilizing concentration of an activator-stabilizer precursor, said precursor being a 2-carboxycarboxamide represented by the formula:

• ##STR39## wherein B is a basic protonated nitrogen containing moiety;
• n is 1 or 2 and is an integer sufficient to form a neutral compound;
• Y, z, y.sup.1 and Z.sup.1 are independently selected from the group consisting of hydrogen and alkyl containing 1 to 4 carbon atoms or Y.sup.1 and Z.sup.1 together represent the atoms necessary to complete a phenylene group;
• R is selected from the group consisting of hydrogen, alkyl containing 1 to 10 carbon atoms, ##STR40## wherein n' is 1 to 6;
• and X is the same as Z and X.sup.1 is the same as Z.sup.1 ;
• said (d) being contiguous to (a) and (b).

A heat developable photographic element comprising a support having thereon a layer comprising (a) a photographic silver salt, (b) a photographic silver salt developing agent, (c) a binder, and (d) an activating concentration of an activator precursor having a pKa within the range of 8 to 12 and represented by the formula:

• ##STR43## wherein Y, X, Y.sup.1 and X.sup.1 are independently selected from the group consisting of hydrogen and alkyl containing 1 to 4 carbon atoms or Y.sup.1 and X.sup.1 together represent the atoms necessary to complete a phenylene group;
• R is selected from the group consisting of hydrogen, alkyl containing 1 to 10 carbon atoms, ##STR44## n' is 1 to 6;
• q is 1 to 6;
• r is 1 or 2 and is an integer sufficient to form a neutral compound;
• R.sup.6 and R.sup.7 are each selected from the group consisting of hydrogen and alkyl containing 1 to 4 carbon atoms;
• R.sup.5, when r is 2, is selected from the group consisting of ##STR45##

A heat developable and heat stabilizable composition comprising (a) a photographic silver salt, (b) a photographic silver salt developing agent, (c) a binder and (d) an activating and stabilizing concentration of an activator-stabilizer precursor that is a 2-carboxycarboxamide represented by the formula:

• ##STR46## wherein B is a basic protonated nitrogen containing moiety;
• n is 1 or 2 and is an integer sufficient to form a neutral compound;
• Y, z, y.sup.1 and Z.sup.1 are individually selected from the group consisting of hydrogen and alkyl containing 1 to 4 carbon atoms or Y.sup.1 and Z.sup.1 together represent the atoms necessary to complete a phenylene group;
• R is selected from the group consisting of hydrogen, alkyl containing 1 to 10 carbon atoms, ##STR47## wherein n' is 1 to 6;
• X is the same as Z and X.sup.1 is the same as Z.sup.1.

A heat developable photographic composition comprising (a) a photographic silver salt, (b) a photographic silver salt developing agent, (c) a binder, and (d) an activating concentration of an activator precursor having a pKa within the range of 8 to 14 and represented by the formula:

• ##STR50## wherein Y, X, Y.sup.1 and X.sup.1 are individually selected from the group consisting of hydrogen and alkyl containing 1 to 4 carbon atoms or Y.sup.1 and X.sup.1 together represent the atoms necessary to complete a phenylene group;
• R is selected from the group consisting of hydrogen, alkyl containing 1 to 10 carbon atoms, ##STR51## n' is 1 to 6;
• q is 1 to 6;
• r is 1 or 2 and is an integer sufficient to form a neutral compound;
• R.sup.6 and R.sup.7 are each selected from the group consisting of hydrogen and alkyl containing 1 to 4 carbon atoms;
• R.sup.5, when r is 2, is selected from the group consisting of ##STR52## s is 1 to 6;
• R.sup.5, when r is 1, is ##STR53##

A method of developing and stabilizing an image in an exposed photographic element comprising a support having thereon a layer comprising (a) a photographic silver salt, (b) a photographic silver salt developing agent, (c) a binder and (d) an activating and stabilizing concentration of an activator-stabilizer precursor, said precursor being a 2-carboxycarboxamide represented by the formula:

• ##STR54## wherein B is a basic protonated nitrogen containing moiety;
• n is 1 or 2 and is an integer sufficient to form a neutral compound;
• Y, z, y.sup.1 and Z.sup.1 are independently selected from the group consisting of hydrogen and alkyl containing 1 to 4 carbon atoms or Y.sup.1 and Z.sup.1 together represent the atoms necessary to complete a phenylene group;
• R is selected from the group consisting of hydrogen, alkyl containing 1 to 10 carbon atoms, ##STR55## wherein n' is 1 to 6;
• and X is the same as Z and X.sup.1 is the same as Z.sup.1 ;
• comprising heating said element to a temperature within the range of about 120.degree. C to 200.degree. C for about 1 to about 60 seconds until an image is developed and stabilized.