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US 6,548,471 B2Granted
Alkoxy-substituted perfluorocompounds
Assignee3M Innovative Properties Company
InventorsRichard M. Flynn, George G. I. Moore
Life of this patent
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Abstract
A process for removing contaminants from the surface of a substrate comprises contacting the substrate with a cleaning composition comprising at least one mono-, di-, or trialkoxy-substituted perfluoroalkane, perfluorocycloalkane, perfluorocycloalkyl-containing perfluoroalkane, or perfluorocycloalkylene-containing perfluoroalkane compound, the compound optionally containing additional catenary heteroatoms. The compounds exhibit good solvency properties while being environmentally acceptable.
Claims3
Alkoxy-substituted perfluorocompounds represented by the general formula
- Rf1—N(Rf2)—CyF2y—O—Rh
- wherein Rf1 and Rf2 are both substituted or unsubstituted perfluoroalkyl groups having from 1 to about 6 carbon atoms or are both substituted or unsubstituted perfluoroalkylene groups having from 2 to about 4 carbon atoms, said perfluoroalkylene groups being bonded to one another to form a ring;
- y is an integer of 1 to about 8;
- CyF2y is linear or branched;
- and Rh is selected from the group consisting of linear or branched alkyl groups having from 1 to about 8 carbon atoms, cycloalkyl-containing alkyl groups having from 4 to about 8 carbon atoms, and cycloalkyl groups having from 3 to about 8 carbon atoms;
- wherein the groups Rf1, Rf2, and Rh can independently contain one or more catenated heteroatoms.
3 more elements
Dependencies are inferred from the claim text.