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US 8,507,419 B2Granted
Salts of thiophosphoric acids and use thereof in lubricants
AssigneesBASF SE, ILCO Chemikalien GmbH
InventorsLaszlo Szarvas, Dirk Gerhard, Matthias Volkholz, Corvin Volkholz
Life of this patent
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Abstract
Salts of the anion of di-, tri- or tetrathiophosphoric acid of the formula I in which Z1 and Z2 are each independently an oxygen or sulfur atom, and Ra and Rb are each independently an organic group having 1 to 20 carbon atoms, and a cation which comprises a heterocyclic ring system having one to three nitrogen atoms.
Claims20
A salt of an anion of di-, tri- or tetrathiophosphoric acid of formula I
- in which Z1 and Z2 are each independently an oxygen or sulfur atom, and Ra and Rb are each independently an organic group having 1 to 20 carbon atoms,
- and a caution,
- wherein the cation is an imidazolium cation of formula II
- where R and R1 are each independently an organic group having 1 to 20 carbon atoms, and R2, R3 and R4 are each independently a hydrogen atom or an organic group having 1 to 20 carbon atoms.
1 more element
A salt of an anion of di-, tri- or tetrathiophosphoric acid of formula I
- in which Z1 and Z2 are each independently an oxygen or sulfur atom, and Ra and Rb are each independently an organic group having 1 to 20 carbon atoms,
- and a cation which comprises a heterocyclic ring system having one to three nitrogen atoms,
- wherein one of the Ra and Rb radicals is, or both Ra and Rb radicals are, a 2-propylheptyl group.
Dependencies are inferred from the claim text.