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US 4,054,596 AGranted
Carboxy and carbohydrocarbyloxy-substituted 1,1-bis(perfluoroalkylsulfonyl)propanes
AssigneeMinnesota Mining and Manufacturing Company
InventorsRobert J. Koshar, Loren L. Barber, Jr.
Life of this patent
Estimating the term…
Abstract
1,1-Bis(perfluoroalkylsulfonyl)propanes substituted in the three position by two to three electron-withdrawing groups, particularly perfluoroalkylsulfonyl, carboxyl, carboalkoxy or cyano are catalysts for the polymerization of aromatic epoxy resins.
Claims3
A substituted 1,1-bis(perfluoroalkylsulfonyl)propane represented by the structure:
- ##STR15## wherein R.sub.f and R'.sub.f are perfluoroalkyl radicals having 1-18 carbon atoms,
- X is hydrogen, chlorine, bromine or nitro, and
- Y and Z are independently COOH or COOR where
- R is alkyl, unsubstituted aryl or arylalkyl having 1 to 24 carbon atoms.
1 more element
Dependencies are inferred from the claim text.