Fluorine-containing alkylsulfobetaines, a process for their prep

Details Fluorine-containing alkylsulfobetaines, a process for their prep Fluorine-containing alkylsulfobetaines, a process for their prep

1982-02-09

1984-02-07

Reamer, James H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252 805, 252 2, C07C14314

Patent

active

044302720

ABSTRACT:
Fluorine-containing alkylsulfobetaines of the general formula ##STR1## wherein R.sub.f denotes a perfluoroalkyl radical having 3 to 16 C atoms, R.sub.1 and R.sub.2, which can be identical or different, denote alkyl radicals or hydroxyalkyl radicals having 1 to 4 C atoms, a is zero or 1, b assumes the value 1 when a is equal to 1 and the values 1 to 4 when a is equal to 0, and c is 3 or 4, are described. These are prepared by reacting the corresponding fluorine-containing amines with propanesultone or butanesultone in organic solvents. The compounds are distinguished in particular by high interfacial activity at the interface of water with non-miscible organic liquids and by compatibility with other surfactants. They are suitable for use as aftertreatment agents (auxiliary dispersing agents) in dispersions of fluoropolymers and as components in fire-extinguishing agents.

REFERENCES:
patent: 2764602 (1956-09-01), Ahlbrecht
patent: 3535381 (1970-10-01), Hauptscheim et al.
patent: 3594411 (1971-07-01), Kite et al.
patent: 3839425 (1974-10-01), Bartlett
patent: 4000092 (1976-12-01), Wentler
patent: 4159277 (1979-06-01), Grosselink et al.
patent: 4283533 (1981-08-01), Richter

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