Ciba-geigy Corporation

Ciba-geigy Ag

Lonza Inc.

Ulrich Kristen

Ulrich Haring

Hermann F Angerer

Franz Regenass

Hermann O Wirth

Michael Rasberger

Robert M O'Neil

Klaus Muller

Francis Fischer

Alain Cron

Arthur Brady

A lubricant oil composition comprising a diesel engine lubricating oil and, as antioxidant, a compound of formula I ##STR1## wherein R.sup.1 and R.sup.2 are each independently of the other C.sub.1 -C.sub.12 alkyl

Stabilized diesel engine oil

The compounds of the formula ##STR1## in which R is C.sub.1 -C.sub.24 alkyl, C.sub.3 -C.sub.20 alkenyl, C.sub.5 -C.sub.6 cycloalkyl, unsubstituted or C.sub.1 -C.sub.4 alkyl-substituted phenyl or phenyl-C.sub.1 -C.sub.4 alkyl, n is 1 or 2, and X is S or O, are highly suitable as additives, in particular as antiwear and high-pressure additives, and as corrosion inhibitors in functional fluids, for example in lubricants, fuels, hydraulic fluids, metal-working fluids and drilling fluids.

1,4-Oxathianones and 1,4-oxathiepanones

New reaction products, useful as additives for functional fluids, are obtained by reacting, at elevated temperature,

Triazole-organodithiophosphate reaction product additives for functional

Compositions, which are obtained by mixing and/or, optionally simultaneously, grinding a preferably liquid phosphate and a solid lubricant component, such as, graphite, are very suitable as additives for lubicants.

Lubricant additive in powder to paste form

Lubricant formulations containing a combination, which has a synergistic action in respect of metal deactivation, composed of 1-[di-(2-ethylhexyl)-aminomethyl]-benztriazole which is methylated in the benzene ring in the 4-position and/or 5-position, and an antioxidant selected from a small group of antioxidants. Further additives can be added to these lubricant formulations. The compositions mentioned above reduce the abrasion phenomena in the components to be lubricated if they are added to mineral and synthetic lubricating oils, hydraulic fluids and lubricating greases.

Lubricant compositions containing antioxidants, amine phosphates and 4-

A stabilizer system containing at least one compound of the formula I ##STR1## and one compound of the formula II ##STR2## the substituents R.sup.1, R.sup.2, R and R' having the meanings defined in the text, and x being 1 to 3. This stabilizer system is suitable for use as an additive to a polyalkylene glycol base liquid for preventing the formation of rust, especially on iron-containing surfaces, the use of these lubricant compositions being possible also in the high-temperature range.

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Riehen, Switzerland

Ulrich Kristen