US4387222A
Expired / Lapsed
US
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Cyclic perfluoroaliphaticdisulfonimides
Assignee: 3M Co
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Filing: 1981-01-30
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Granted: 1983-06-07
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Expires: 2001-01-30
Abstract
Abstract Acidic cyclic perfluoroaliphaticdisulfonimides, salts thereof, a process for making the same, curable compositions containing acidic cyclic perfluoroaliphaticdisulfonimides or salts thereof and cationically-sensitive monomers, and a process for using acidic cyclic perfluoroaliphaticdisulfonimides and salts thereof as catalysts for the cure of cationically-sensitive monomers.
Inventors
- 👤 Robert J. Koshar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:00
CPC Classifications
C; C07; C07D; C07D285/00; C07D285/01; C07D285/15; C07D285/36; C08; C08K; C08K5/00; C08K5/36; C08K5/45; C08K5/46
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
Acidic cyclic perfluoroaliphaticdisulfonimides and their salts comprising compounds of the formula: ##STR4## wherein R f is perfluoroalkylene having 2 to 4 catenary carbon atoms or perfluorocycloalkylene having 4 to 7 ring atoms, R f optionally being substituted by one or more straight chain, branched, or cyclic perfluoroalkyl groups of 1 to 12 carbon atoms, with R f having a total of up to 14 carbon atoms; M is a cation with a valence equal to n; and n is an integer with a value of 1 to 5.
Claim 2
Dependent Claim
88 words
Acidic cyclic perfluoroaliphaticdisulfonimides and their salts comprising compounds of the formula: ##STR4## wherein R f is perfluoroalkylene having 2 to 4 catenary carbon atoms or perfluorocycloalkylene having 4 to 7 ring atoms, R f optionally being substituted by one or more straight chain, branched, or cyclic perfluoroalkyl groups of 1 to 12 carbon atoms, with R f having a total of up to 14 carbon atoms; M is a cation with a valence equal to n; and n is an integer with a value of 1 to 5.
Claim 3
Dependent Claim
38 words
Compounds according to claim 1, wherein R f is perfluoroalkylene having 2 to 4 catenary carbon atoms, R f optionally being substituted by one or more straight chain or branched perfluoroalkyl groups of 1 to 4 carbon atoms.
Claim 4
Dependent Claim
13 words
Compounds according to claim 2, wherein M is hydrogen and n is one.
Claim 5
Dependent Claim
18 words
Compounds according to claim 1, wherein R f is --CF 2 --m and m is 2 to 4.
Claim 6
Dependent Claim
9 words
Compounds according to claim 4, wherein m is 2.
Claim 7
Dependent Claim
9 words
Compounds according to claim 4, wherein m is 3.
Claim 8
Dependent Claim
9 words
Compounds according to claim 4, wherein m is 4.
Claim 9
Dependent Claim
50 words
Compounds according to claim 1, wherein M is hydrogen, ammonium, a substituted ammonium cation, or a monovalent or polyvalent cation of a metal selected from the group consisting of Groups I-V and VIII, Subgroups VIB and VIIB, and the lanthanide and actinide series of the Periodic Table of the Elements.
Claim 10
Dependent Claim
34 words
Compounds according to claim 8, wherein M is a cation of a metal from Groups III, IV, V or VIII, or Subgroups IB, IIB, VIB, or VIIB of the Periodic Table of the Elements.
Claim 11
Dependent Claim
32 words
A process for the preparation by ring formation of Compounds according to claim 1, comprising the step of adding ammonia to perfluoroaliphaticdisulfonyl fluoride precursor, thereby forming the ammonium salt of cyclic perfluoroaliphaticdisulfonimide.
Claim 12
Dependent Claim
28 words
A process according to claim 10, further comprising the step of converting said ammonium salt of cyclic perfluoroaliphaticdisulfonimide to other salt of cyclic perfluoroaliphaticdisulfonimide or to acidic perfluoroaliphaticdisulfonimide.
References Cited (Backward Citations)
US2553770A
Cited
US2732398A
Cited
US3347676A
Cited
US3842019A
Cited
DE2239817A1
Cited
US4031036A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |