Ciba-geigy Corporation

Kay S Groninger

Hugo Camenzind

Hermann O Wirth

Hans-Helmut Friedrich

Robert M O'Neil

John David Payne

Miles Hutchings

Compounds of the general formula I ##STR1## in which n is 1, 2 or 3 and in which X is oxygen or sulfur, T has the meaning of --S--, --S--S--, --S--S--, --S--S--S--S--, --S--S--S--S--S--, ##STR2## and Y has the meaning of ##STR3## in which Z has the meaning of --H, --COR.sup.13, --COOR.sup.13 or --CONHR.sup.13, and Q has the meaning of oxygen or --NR.sup.0 --, and R.sup.1, R.sup.2, R.sup.0, R.sup.4 and R.sup.13 are as defined in claim 1, with the proviso that the compound of the formula C.sub.2 H.sub.5 --S--CH.sub.2 CH(OH)--P(OC.sub.2 H.sub.5).sub.2 is excepted. The invention also relates to compositions containing the compounds of the formula I and organic materials, for example functional liquids and, in particular, lubricants.

Phosphonic acid derivatives and thionophosphonic acid derivatives

Novel compounds of the formula (I) ##STR1## in which X is oxygen or sulfur, R and R.sub.1 independently of one another are C.sub.3 -C.sub.30 alkyl, R.sub.2 is C.sub.4 -C.sub.18 alkyl and R.sub.3, R.sub.4, R.sub.5 and R.sub.6 independently of one another are H, C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.20 alkenyl, benzyl, phenyl or phenyl which is substituted by C.sub.1 -C.sub.12 alkyl, and in which R.sub.5 and R.sub.6 can also be a direct bond, or R.sub.3 and R.sub.4 together are trimethylene, tetramethylene, ##STR2## and R.sub.5 and R.sub.6 are a direct bond or H, or in each case R.sub.3 and R.sub.6 together are a group .dbd.CH.sub.2 and R.sub.4 and R.sub.5 are H, or R.sub.4 and R.sub.5 together are a group .dbd.CH.sub.2 and R.sub.3 and R.sub.6 are H, or R.sub.3, R.sub.4, R.sub.5 and R.sub.6 together are ##STR3## and salts of these compounds, are described. They can be employed as multipurpose additives, in particular as anticorrosion, high pressure and antiwear additives, and as antioxidants in the lubricants and hydraulic or metalworking fluids.

Multifunctional lubricant additives

The present invention provides a lubricant composition comprising a lubricating oil and, as multifunctional additive, at least one compound having the formula I: ##STR1## or amine salts thereof; wherein R.sub.1 and R.sub.2, independently, are hydrogen or methyl; n and m, independently, are 0 or 1; and X is SR.sub.3 or NR.sub.4 R.sub.5 wherein R.sub.3 is C.sub.12 -C.sub.20 linear or branched alkyl R.sub.4 and R.sub.5 are independently, C.sub.8 -C.sub.20 linear or branched alkyl provided that those compounds of formula I are excluded in which m and n are each 0, X is S-C.sub.8 -C.sub.20 linear or branched alkyl and R.sub.1 and R.sub.2 are as defined.

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Darmstadt, Germany

Kay S Groninger