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US 4,167,639 AGranted
Fluorinated sulfosuccinates
AssigneeHoechst Aktiengesellschaft
InventorsSeigfried Billenstein, Heinz Brecht, Dieter Hoffmann
Life of this patent
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Abstract
Addition products of water-soluble sulfites or disulfites to maleic acid mono- or diesters of partially fluorinated alkanols or the mono-, di- or triethyleneglycol ethers of these alcohols are useful as surface active agents, especially as wetting agents, as levelling agents in wax emulsions or as dispersants.
Claims10
A compound of the formula
- R--O--CO--CH.sub.2 --CH(SO.sub.3 M)--CO--O--R.sup.1
- in which R is a group of the formula
- R.sub.f --(CH.sub.2).sub.m --(OCH.sub.2 CH.sub.2).sub.n --
- wherein R.sub.f is straight-chain or terminally methyl-branched perfluoroalkyl of 2 to 8 carbon atoms, m is a number of 1 to 4, n is a number of zero to 3, M is hydrogen, an alkali metal, ammonium, monoethanolammonium, diethanolammonium, triethanolammonium, glycinium, taurinium, and N-methyltaurinium, and R.sup.1 is defined as R or as M.
1 more element
Dependencies are inferred from the claim text.