Alkyl perfluoro-ω-fluoroformyl esters and monomers therefrom
Patent 4138426 Issued on February 6, 1979. Estimated Expiration Date: 
January 11, 1998. 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.
January 11, 1998. 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 References3852326 InventorAssigneeApplicationNo. 05/868615 filed on 01/11/1978US Classes:558/449, Cyano is attached directly or indirectly by nonionic bonding to carbon that is multiple bonded to another carbon526/245, Fluorine containing monomer is a mono-carboxylic acid ester526/247, Fluorine containing monomer is an ether560/183, Unsaturation in acid moiety560/184, Halogen in acid moiety562/586HalogenExaminersPrimary: Helfin, BernardAssistant: Hendriksen, Leah International ClassesC07C 59/00 (20060101)C07C 59/60 (20060101) C08F 16/26 (20060101) C08F 16/00 (20060101) AbstractAlkyl perfluoro-ω-fluoroformyl esters are provided which have the formula ##STR1## wherein R is alkyl of 1-6 carbon atoms, and N IS 0-6 (PREFERABLY 0).Compounds where n is 0 are prepared by contacting SO3 with a compound of the formulaCompounds where n is 1-6 are prepared by contacting a compound where n is 0 with hexafluoropropylene oxide.Also provided are polymerizable monomers having the formula ##STR2## wherein Y is --COOR, --COOH, --COOM or --CN, where M is an alkali metal, ammonium or quaternary ammonium and p is 1-5, prepared from alkyl perfluoro-ω-fluoroformyl esters of this invention. |
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