Pyridylbenzimidazole compositions for absorbing ultraviolet light
AssigneeSteadfast Corporation
InventorsGeorge R. Bird, Louis Locatell, Kenneth S. Norland, Louis M. Scarmoutzos
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Abstract
Metal complexes of pyridylbenzimidazoles are described which can be used as ultraviolet absorbers. The pyridylbenzimidazole compounds can be substituted or unsubstituted. The ultraviolet absorbers can be used to protect a carrier or to protect objects being shielded by a carrier.
Claims36
A composition for absorbing ultraviolet light comprising an effective amount of at least one metal complex of a pyridylbenzimidazole compound and a carrier subject to ultraviolet light degradation,
- said pyridylbenzimidazole compound being effective to protect said carrier against ultraviolet light degradation.
A composition for absorbing ultraviolet light comprising an effective amount of the compound having the following formula:
- ##STR18## wherein M is a metal;
- L is a ligand;
- n is a number between 1 and 4;
- m is a number between 0 and 4;
- R.sub.1 -R.sub.8 are each is selected from a the group consisting of hydrogen, hydroxyl, alkyl, alkenyl, alkynyl, aryl, aralkyl ##STR19## benzimidazoyl, carboxylic acids, carboxylic esters, amides, --SO.sub.3 H, --SO.sub.2 X.sub.1 ;
- alkylphenols, alkylphenol ethoxylates, halogen, haloalkyl, --NX.sub.2, and --OX.sub.3, wherein X.sub.1 is alkyl, alkenyl, aryl, aralkyl, alkynyl;
- wherein X.sub.2 is hydrogen, oxygen, alkyl, alkenyl, aryl, aralkyl or alkynyl;
- X.sub.3 is hydrogen, alkyl, alkenyl, alkynyl, aryl, aralykyl, ##STR20## and x, y, and z are the electrical charges associated with the moieties;
- a carrier, said effective amount of said compound being effective to protect said carrier against ultraviolet light degradation.
Dependencies are inferred from the claim text.