# US 4,400,282 A · Lubricating oils containing quaternary ammonium thiomolybdates

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- Number: US 4,400,282 A
- Document ID: US4400282A
- Status: Granted
- Kind: A
- Application number: 06/216,140
- Filed: 1980-12-15
- Granted: 1983-08-23
- Earliest claimed: 1980-12-05
- Assignees: Gulf Research & Development Company
- Inventors: Gary M. Singerman; Yumi P. Ryu; James R. Anglin
- Web page: https://patentgrep.com/patent/US4400282A

## CPC

- C10M 141/10: at least one of them being an organic phosphorus-containing compound
- C07F 11/005: {compounds without a metal-carbon linkage}
- C10M 133/06: having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M 133/56: Amides; Imides
- C10M 137/10: Thio derivatives
- C10M 2215/02: Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M 2215/04: having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M 2215/042: containing hydroxy groups; Alkoxylated derivatives thereof
- C10M 2215/22: Heterocyclic nitrogen compounds
- C10M 2215/221: Six-membered rings containing nitrogen and carbon only
- C10M 2215/225: the rings containing both nitrogen and oxygen
- C10M 2215/226: Morpholines
- C10M 2215/26: Amines
- C10M 2215/28: Amides; Imides
- C10M 2215/30: Heterocyclic compounds
- C10M 2223/045: Metal containing thio derivatives
- C10N 2010/04: Groups 2 or 12
- C10N 2010/12: Groups 6 or 16
- C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33)
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS

## Abstract

Hydrocarbon lubricating oils with a tetrahydrocarbylammonium thiomolybdate having at least about 19 carbon atoms, such as dicocodimethylammonium thiomolybdate, solubilized in the oil are characterized by improved anti-friction properties.

## Claims

### Claim 1

A lubricating oil composition comprising a major portion of a hydrocarbon lubricating oil comprising in solution (a) at least a friction reducing amount of a tetrahydrocarbylammonium thiomolybdate having the formula ##STR3## wherein R.sub.1, R.sub.2 and R.sub.3 are independently selected from straight and branched alkyl and alkenyl having from one to about 30 carbon atoms, R.sub.4 is straight or branched alkyl or alkenyl having from about 12 to about 30 carbon atoms and the total number of carbon atoms in R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is between about 19 and about 80 carbon atoms, and (b) a sufficient amount of (1) a zinc dialkyl dithiophosphate and (2) an ashless dispersant to solubilize said tetrahydrocarbylammonium thiomolybdate in the hydrocarbon lubricating oil.

### Claim 2 (depends on 1)

A lubricating oil composition in accordance with claim 1 wherein R.sub.1 and R.sub.2 independently have from about 1 to about 20 carbon atoms, R.sub.3 and R.sub.4 independently have from about 12 to about 20 carbon atoms, and the total number of carbon atoms in R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is between about 25 and about 60 carbon atoms.

### Claim 3 (depends on 2)

A lubricating oil composition in accordance with claim 2 wherein R.sub.1 and R.sub.2 are methyl.

### Claim 4 (depends on 2)

A lubricating oil composition in accordance with claim 2 wherein R.sub.1 is methyl and R.sub.2 has between about 12 and about 20 carbon atoms.

### Claim 5 (depends on 2)

A lubricating oil composition in accordance with claim 2 wherein said thiomolybdate is dicocodimethylammonium thiomolybdate.

### Claim 6 (depends on 2)

A lubricating oil composition in accordance with claim 2 wherein said thiomolybdate is bis(hydrogenatedtallow)dimethylammonium thiomolybdate.

### Claim 7 (depends on 3)

A lubricating oil composition in accordance with claim 3 wherein said thiomolybdate is tris(hydrogenatedtallow)methylammonium thiomolybdate.

### Claim 8 (depends on 1)

A lubricating oil composition in accordance with claim 1 comprising from about 0.1 to about six weight percent of said tetrahydrocarbylammonium thiomolybdate.

### Claim 9 (depends on 1)

A lubricating oil composition in accordance with claim 1 comprising from about 0.5 to about three weight percent of said tetrahydrocarbylammonium thiomolybdate.

### Claim 10 (depends on 1)

A lubricating oil composition in accordance with claim 1 wherein said zinc dialkyl dithiophosphate has the formula ##STR4## wherein R and R' are independently selected from hydrocarbyl radicals having from 1 to about 18 carbon atoms.

### Claim 11 (depends on 10)

A lubricating oil composition in accordance with claim 10 wherein R and R' are independently selected from alkyl radicals having from about 2 to about 12 carbon atoms.

### Claim 12 (depends on 1)

A lubricating oil composition in accordance with claim 1 comprising from about 0.01 to about 5 weight percent of said zinc dialkyl dithiophosphate and from about 0.1 to about 15 weight percent of said ashless dispersant.