2-[2-Hydroxy-3,5-di-tert-octylphenyl]-2H-benzotriazole in stabilized photographic compositions
First Claim
1. An ultraviolet absorbing dispersion comprising a gelatin binder material and a hydrophobic compound selected from those having the formula:
- ##STR8## wherein R1 is hydrogen or chloro, and R2 is tert-octyl.
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Abstract
2-[2-Hydroxy-3,5-di-tert-octylphenyl]-2H-benzotriazole exhibits outstanding efficacy in protecting organic substrates from light induced deterioration as well as good resistance to loss by volatilization or exudation during the high temperature processing of stabilized compositions.
This stabilizer and its 5-chloro analog exhibit great resistance to volatilization, enhanced solubility in selected solvents, desirable absorption characteristics in the ultraviolet range and photographic inertness. This combination of properties makes these benzotriazoles particularly useful in photographic compositions especially in protecting color dye images against the harmful effects of ultraviolet light.
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9 Claims
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1. An ultraviolet absorbing dispersion comprising a gelatin binder material and a hydrophobic compound selected from those having the formula:
- ##STR8## wherein R1 is hydrogen or chloro, and R2 is tert-octyl.
- View Dependent Claims (3, 4, 5, 6)
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2. An ultraviolet absorbing dispersion comprising a gelatin binder material, a solvent and a hydrophobic compound selected from those having the formula:
- ##STR9## wherein R1 is hydrogen or chloro, and R2 is tert-octyl.
- View Dependent Claims (7)
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8. As aqueous gelatin coating composition comprising a dispersion of water, gelatin and an ultraviolet absorbing hydrophobic compound selected from those having the formula:
- ##STR10## wherein R1 is hydrogen or chloro, and R2 is tert-octyl.
- View Dependent Claims (9)
Specification