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AssigneeMinnesota Mining and Manufacturing Company
InventorsRichard D. Howells, William M. Lamanna, Alan D. Fanta, Jennifer Waddell
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A method for preparing fluoroalkylsulfonyl imides by reacting a fluoroalkylsulfonamide with a fluoroalkylsulfonyl halide or a fluorosulfonyl halide in the presence of a non-nucleophilic base. One reaction is: Z--R.sub.f --SO.sub.2 NH.sub.2 +Z--R'.sub.f --SO.sub.2 --X+2B(Z--R.sub.f --SO.sub.2)(Z--R'.sub.f --SO.sub.2)N.sup.-.BH.sup.+ +BHX, where each Z is a fluorine atom or a polymerizable organic functional group, R.sub.f and R'.sub.f are fluoroalkylene groups optionally containing catenary oxygen or nitrogen, X is a halogen atom, and B is a non-nucleophilic base. Unsymmetrical imides and polymeric imides can be prepared.
A process for the preparation of a bis(fluoroalkylsulfonyl)imide salt comprising the step of reacting at least two equivalents of a fluoroalkylsulfonyl halide (wherein the fluoroalkyl is substantially fluorinated) with one equivalent of ammonia and at least three equivalents of a non-nucleophilic base at a temperature and for a time sufficient to yield the imide salt, provided that if the fluoroalkylsulfonyl halide is a perfluoroalkylsulfonyl halide, the alkyl group has at least 2 carbon atoms.
A process for preparing a bis(fluoroalkylsulfonyl)imide which comprises contacting a sulfonamidofluoroalkylenesulfonyl halide of the formula X--SO.sub.2 --R.sub.f --SO.sub.2 NH.sub.2 with a non-nucleophilic base at a temperature and for a time sufficient to produce a polymeric fluoroalkylsulfonimide having the repeat unit .paren open-st.SO.sub.2 --R.sub.f --SO.sub.2 N.sup.- .paren close-st..sub.n, wherein n is an integer greater than 1 and X is a halogen atom.
A process for preparing a polymeric fluoroalkylsulfonimide comprising a reaction step characterized by the reaction scheme:
A process for preparing a polymeric fluoroalkylsulfonimide comprising a reaction step characterized by the reaction scheme:
Dependencies are inferred from the claim text.