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US 4,281,128 AGranted
Bispiperazido phosphorus compounds
Assignees.a. Texaco Belgium n.v.
InventorJohny C. Hermans
Life of this patent
Estimating the term…
Abstract
Compounds useful as lube oil additives are prepared by reaction of phosphorus halides and piperazine derivatives.
Claims5
A compound of the formula:
- ##STR29## and salts of such compounds, wherein X represents an oxygen or sulphur atom or is absent;
- Y represents an aliphatic, cycloaliphatic, or aromatic hydrocarbon group;
- R.sup.1 represents an inert substituent on the piperazine ring;
- R.sup.2 represents a hydrogen atom or an aliphatic or cycloaliphatic hydrocarbon group, an acyl group, a sulphonyl group, a substituted phosphorus-containing group, or a substituted carbamoyl group;
- and
- n represents 0 or an integer;
- and
- salts of such compounds in which at least one of the groups R.sup.2 represents a hydrogen atom.
5 more elements
A compound of the formula:
- ##STR30## and salts of such compounds, wherein X represents an oxygen or sulphur atom or is absent;
- Y represents an aliphatic, cycloaliphatic, or aromatic hydrocarbon group;
- R.sup.2 represents a hydrogen atom or an aliphatic, cycloaliphatic hydrocarbon group, an acyl group, a sulphonyl group, a substituted phosphorus-containing group or a substituted carbamoyl group;
- and
- salts of such compounds in which at least one of the groups R.sup.2 represents a hydrogen atom.
2 more elements
Dependencies are inferred from the claim text.