Copolymers of substituted piperidines, their manufacture and use
Patent 4308362 Issued on December 29, 1981. Estimated Expiration Date: 
May 19, 2000. 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 19, 2000. 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 2687400 2687401 3355518 InventorsApplicationNo. 06/150733 filed on 05/19/1980US Classes:525/327.6, Nitrogen containing chemical treating agent other than unsubstituted ammonium as sole nitrogen525/203, Solid polymer derived from ethylenic reactant containing a heterocyclic nitrogen525/329.6, Butene dioic acid or derivative monomer525/375, Contains nitrogen atom in a heterocyclic ring526/2656-membered ring contains a single nitrogen atomExaminersPrimary: Wong, Harry Jr.Attorney, Agent or FirmInternational ClassesC08L 101/00 (20060101)C08F 222/00 (20060101) C08F 222/22 (20060101) C08F 222/38 (20060101) Foreign Application Priority Data1979-05-23 DEAbstractThe invention relates to copolymers of polyalkyl piperidines which are substituted by a polymerizable group and which have the formula ##STR1## with olefinic comonomers such as ethylene, styrene, vinyl acetate, acrylates or methacrylates. The copolymers which have a molecular weight of from 1,000 to 10,000 are used as light stabilizers for synthetic polymers which do not migrate to the surface of the polymers.Field of Search6-membered ring contains a single nitrogen atom | |
