Azo free radical initiators containing ultraviolet light stabilizing groups
Patent 3956269 Issued on May 11, 1976. Estimated Expiration Date: 
May 11, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 11, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2520338 3282912 3285949 3317462 3391110 3474085 3812095 InventorsAssigneeApplicationNo. 435623 filed on 01/22/1974US Classes:534/886, Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl, etc.)525/25, Specified material contains nitrogen atom525/376, Nitrogen-containing compound has at least one nitrogen-to-nitrogen bond526/219, Organic N-N or N=N containing compound also contains at least one S or O chemically bound therein526/271, Acid anhydride526/324, Interpolymerized with hydrocarbon monomer526/347, Interpolymerized534/595, Formation of -C(=X)X- ester group, wherein the X's may be the same or diverse chalcogens534/799, The hetero ring or a polycyclo ring system which contains the hetero ring as one of the cyclos is bonded directly to one of the carbocyclic rings or to a bicyclo ring system which contains the carbocyclic ring as one of the cylcos534/800, The hetero ring is one of the cyclos in a polycyclo ring system534/885, Benzene ring bonded directly to the azo group548/110, Boron or silicon containing548/261, The chalcogen, X, is in a -C(=X)- group558/151, Oxygen single bonded to oxygen, or sulfur single bonded to sulfur (e.g., peroxy compounds, etc.)558/263, Oxygen bonded directly to the -O-C(=O)O- group by nonionic bonding (e.g., monoperoxycarbonates, etc.)558/387, Oxygen single bonded to oxygen, or sulfur single bonded to sulfur (e.g., peroxy compounds, etc.)560/109, Esterified phenolic hydroxy560/140, Plural rings bonded directly to the same carbon in phenolic moiety560/26, Polyoxy alcohol moiety560/66, Acylated560/71, Salicylic acid562/526Of nitrogen containing compoundExaminersPrimary: Warren, Charles F.AbstractCompounds which contain azo linkages as well as the radical of an ultraviolet light stabilizing group are described. These compounds function as polymerization initiators which cause an ultraviolet light stabilization group to be chemically bound to the polymer. |
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