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US 5,176,850 AGranted
Substituted glycerol compounds
AssigneeCiba-Geigy Corporation
InventorRobert M. O'Neil
Life of this patent
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Abstract
The present invention provides a composition in contact with a corrodable metal surface, comprising a functional fluid and, as corrosion inhibitor, a compound having the formula 1A ##STR1## as well as salts or esters thereof, wherein R.sup.3 is C.sub.9 -C.sub.20 linear or branched alkyl, phenyl or C.sub.7 -C.sub.20 alkylphenyl; R.sup.4 is C.sub.1 -C.sub.3 alkyl; X is CH.sub.2, O or S; Y is O or S; and Z is--(CH.sub.2).sub.n -in which n is 1,2,3,4 or 5, or Z is--CH.sub.2 --CH(CH.sub.3)-.
Claims2
A compound of formula IA:
- ##STR10## wherein in the case where M is H, R.sub.3 is a C.sub.9 -C.sub.20 linear or branched alkyl, phenyl or C.sub.7 -C.sub.20 alkylphenyl, R.sub.4 is a linear or branched C.sub.1 -C.sub.3 alkyl, X is CH.sub.2 or O, Y is O, Z is --(CH.sub.2).sub.n -- in which n is 1,2,3,4, or 5, or Z is --CH.sub.2 --CH--(CH.sub.3)--;
- or a C.sub.1 -C.sub.4 alkyl, or a C.sub.1 -C.sub.4 alkyl interrupted by one --O-- atom, C.sub.7 -C.sub.9 phenylalkyl, C.sub.7 -C.sub.18 alkylphenyl or C.sub.6 -C.sub.10 aryl ester thereof;
- or a salts thereof obtained when M is sodium, potassium, calcium, magnesium, ammonium, tri(C.sub.1 -C.sub.4)alkylammonium, bis(hydroxyethyl)ammonium, tris(hydroxyethyl)ammonium, octylamine, or dodecylamine.
Dependencies are inferred from the claim text.