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US 5,328,621 AGranted
Dithiophosphates as antiwear additives
AssigneeCiba-Geigy Corporation
InventorsHugo Camenzind, Paul Dubs
Life of this patent
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Abstract
The invention relates to novel compounds of formulae I, II and III ##STR1## wherein R.sub.1 is hydrogen, C.sub.1 -C.sub.20 alkyl or C.sub.5 -C.sub.7 cycloalkyl, R.sub.2 is hydrogen, C.sub.1 -C.sub.20 alkyl or C.sub.5 -C.sub.7 cycloalkyl, and R.sub.3 is C.sub.1 -C.sub.18 alkyl or C.sub.3 -C.sub.18 alkenyl. The compounds are used as antiwear additives for lubricants.
Claims9
A compound of formula I, II or III ##STR5## wherein R.sub.1 is hydrogen, C.sub.1 -C.sub.20 alkyl or C.sub.5 -C.sub.7 cycloalkyl,
- R.sub.2 is hydrogen, C.sub.1 -C.sub.20 alkyl or C.sub.5 -C.sub.7 cycloalkyl, and
- R.sub.3 is C.sub.1 -C.sub.18 alkyl or C.sub.3 -C.sub.18 alkenyl.
Dependencies are inferred from the claim text.