Method for the manufacture of a thermally processable imaging element
AssigneeEastman Kodak Company
InventorsWojciech M. Przezdziecki, Jean Z. DeRuyter
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Abstract
An improved method for manufacture of a thermographic or photothermographic element comprises the addition to the imaging composition of an amount sufficient to enhance the adhesive characteristics thereof of a polyalkoxysilane which has been pre-hydrolyzed in an organic solvent with a stoichiometric amount of water. A particularly suitable material is tetraethoxysilane which has been hydrolyzed in acetone with four moles of water for each mole of tetraethoxysilane.
Claims16
A method for the manufacture of a thermographic or photothermographic element, said method comprising the steps of:
- (1) preparing a thermographic or photothermographic imaging composition;
- (2) hydrolyzing a polyalkoxysilane with a stoichiometric amount of water in an organic solvent,
- (3) adding the product of step (2) to said thermographic or photothermographic imaging composition;
- (4) applying to a support a layer of the product of step (3);
- (5) drying said layer;
- and
- (6) overcoating said layer with a protective overcoat composition.
A method for the manufacture of a photothermographic element, said method comprising the steps of:
- (1) preparing a photothermographic imaging composition comprising:
- (a) photographic silver halide, and
- (b) an image-forming combination comprising
- (i) an organic silver salt oxidizing agent, with
- (ii) a reducing agent for said organic silver salt oxidizing agent;
- (2) hydrolyzing tetraethoxysilane in acetone with four moles of water;
- (3) adding the hydrolyzed tetraethoxysilane formed in step (2) to said imaging composition in an amount of about 5 to about 15 percent by weight;
- (4) applying to a poly(ethylene terephthalate) film support a layer of the product of step (3);
- (5) drying said layer;
- and
- (6) overcoating said layer with a protective overcoat composition comprising poly(silicic acid) and poly(vinyl alcohol).
Dependencies are inferred from the claim text.