Lubricating oil additives

• US 5,240,625 A
• Filed: 03/20/1990
• Issued: 08/31/1993
• Est. Priority Date: 03/23/1989
• Status: Expired due to Fees

• Current Assignee: BP Chemical Company (BP PLC)
• Original Assignee: BP Chemical Company (BP PLC)
• Inventors: O'Connor, Sean P.
• Primary Examiner(s): Medley, Margaret
• Application Number:
  US07/496,216
• Time in Patent Office: 1,260 Days
• Field of Search: 252/47.5, 252/39.41, 252/48.4, 252/48.6, 252/56 R, 260/399, 260/401, 560/130, 560/206, 564/204
• US Class Current: 508/331
• CPC Class Codes: C10L 1/2493 compounds of uncertain formula; reactions of organic compounds (hydrocarbons, acids, esters) with sulfur or sulfur containing compounds
• CPC Class Codes: C10L 10/08 for improving lubricity; for reducing wear
• CPC Class Codes: C10M 129/70 of monocarboxylic acids
• CPC Class Codes: C10M 135/02 Sulfurised compounds
• CPC Class Codes: C10M 2219/02 Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
• CPC Class Codes: C10M 2219/022 of hydrocarbons, e.g. olefines polyolefins C10M2221/041
• CPC Class Codes: C10M 2219/082 containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2219/087 containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
• CPC Class Codes: C10M 2219/088 Neutral salts
• CPC Class Codes: C10M 2219/089 Overbased salts
• CPC Class Codes: C10M 2219/10 Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
• CPC Class Codes: C10M 2219/102 containing sulfur and carbon only in the ring
• CPC Class Codes: C10M 2219/104 containing sulfur and carbon with nitrogen or oxygen in the ring
• CPC Class Codes: C10M 2219/106 Thiadiazoles
• CPC Class Codes: C10M 2221/041 involving sulfurisation of macromolecular compounds, e.g. polyolefins
• CPC Class Codes: C10N 2070/02 Concentrating of additives

Abstract

A lubricating oil additive suitable as an extreme pressure/anti-wear additive comprises the product obtainable by reacting at elevated temperature a mixture comprising (i) sulphur, (ii) at least one C₁₀ to C₁₀₀ unsaturated carboxylic acid, and (iii) at least one hydrocarbyl-substituted phenol, the amount of (iii) in the mixture being 15 to 65% w/w based on the combined weight of (i) (ii) and (iii). The reaction mixture can further comprise an olefin and/or, a mercaptan and/or a lubricating oil as a diluent. The additive is also useful as an anti-oxidant. Additive concentrates and lubricating oil compositions comprise a lubricating oil and the additives of the present invention.

Claims

1. An additive suitable for use as an extreme pressure/antiwear additive in lubricating oil comprising the product obtained by reacting at elevated temperature a mixture comprising (i) sulphur, (ii) at least one C₁₄ to C₂₂ unsaturated carboxylic acid, and (iii) at least one hydrocarbyl-substituted phenol, the amount of (iii) in the mixture being 15 to 65% w/w based on the combined weight of (1) (ii) and (iii).

2. An additive as claimed in claim 1 wherein the amount of (i) in the mixture is 1 to 25% w/w based on the combined weight of (ii) and (iii) in the mixture.

3. An additive as claimed in claim 2 wherein (i) is elemental sulfur.

4. An additive as claimed in claim 1 wherein (i) is elemental sulphur.

5. An additive as claimed in claim 1 wherein (iii) is a mono or dialkyl phenol.

6. An additive as claimed in claim 1 wherein said mixture further contains a C₆ -C₁₀₀ olefin in an amount up to 65% w/w as a diluent.

7. An additive as claimed in claim 6 wherein said olefin is a C₁₈ alpha olefin.

8. An additive as claimed in claim 1 wherein said mixture further contains a mercaptan in an amount up to 65% w/w as a diluent.

9. An additive as claimed in claim 1 wherein said mixture further contains from 0-65% w/w of a lubricating oil in an amount up to 65% w/w as a diluent.

10. An additive as claimed in claim 1 wherein (iii) is a C₈ -C₂₄ alkyl phenol.

11. An additive as claimed in claim 1 wherein said mixture further contains up to 65% w/w of one or more of a mercaptan, a C₆ -C₁₀₀ olefin, or a lubricating oil.

12. An additive as claimed in claim 11 wherein said olefin is a C₁₈ alpha olefin.

13. A lubricating oil composition comprising a lubricating oil and an additive as claimed in claim 11, said additive being present in an amount from 0.01 to 10% w/w based on the weight of the composition.

14. An additive concentrate comprising a lubricating oil and an additive as claimed in claim 1 said additive being present in an amount from 2 to 20% w/w based on the weight of the concentrate.

15. A lubricating oil composition comprising a lubricating oil and an additive as claimed in claim 1 said additive being present in an amount from 0.01 to 10% w/w based on the weight of the composition.