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AssigneePolaroid Corporation
InventorsHoward G. Rogers, Robert D. Eckert, Ronald A. Sahatjian, Robert A. Sulesky
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Solid compositions are disclosed comprising a complex of water; a benzotriazole of the formula ##STR1## wherein R.sup.1 and R.sup.2 are independently hydrogen, a monovalent organic radical, halogen, or nitro; and at least one water-soluble base having a basicity greater than that of the benzotriazole and capable of dissociating to provide an anion and a monovalent or divalent metal cation. The compositions have melting ranges above 35.degree. C. and are capable of releasing a substantial portion of the water contained therein to the surrounding environment when melted. The compositions can be employed in thermally developable photographic film units as thermally induced water-releasing materials which provide water to the internal environment of the film unit when the film unit is heated sufficiently to melt the composition.
A solid composition having a releasable content of water and comprising a complex of water, a benzotriazole of the formula ##STR7## wherein R.sup.1 and R.sup.2 are independently hydrogen, a monovalent organic radical, halogen, or nitro, and at least one water-soluble base having a basicity greater than that of said benzotriazole and capable of dissociating to provide an anion and a mono-valent or divalent metal cation, said water, benzotriazole and water-soluble base being in proportions such that the complex has a melting range above 35.degree. C., said complex being capable of releasing a substantial portion of said water content by the melting thereof.
A process for preparing a solid complex having a releasable content of water, said process comprising the steps of mixing water, a benzotriazole of the formula ##STR9## wherein R.sup.1 and R.sup.2 are independently hydrogen, a monovalent organic radical, halogen, or nitro, and at least one water-soluble base having a basicity greater than that of said benzotriazole and capable of dissociating to provide an anion and a monovalent or divalent metal cation, said mixing being conducted under conditions of time and temperature such that a single phase liquid is obtained;
Dependencies are inferred from the claim text.