Lubricant Composition

Patent metadata

Field	Value
Publication number	US-2016289587-A1
Application number	US-201414392397-A
Country	US
Kind code	A1
Filing date	Nov 4, 2014
Priority date	Nov 4, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

A lubricant composition for a compression-ignition internal combustion engine comprises: (i) an amine as an ashless fuel additive having a total base number (“TBN”) of from about 275 to about 600 mg KOH/g when tested according to ASTM D2896; and (ii) a detergent selected from metal sulfonates, phenates, salicylates, carboxylates, thiophosphonates, and combinations thereof. The lubricant composition has a TBN of from about 20 to about 130 mg KOH/g when tested according to ASTM D2896. The amine contributes greater than about 30% of the TBN of the lubricant composition. Further, a method of lubricating an internal combustion engine with the lubricant composition comprises the steps of injecting a fuel and the lubricant composition into a cylinder to form a mixture, and combusting the mixture via compression-ignition.

First claim

1 . A lubricant composition for a compression-ignition internal combustion engine, said lubricant composition comprising:
(i) an amine as an ashless fuel additive having a TBN of from about 275 to about 600 mg KOH/g when tested according to ASTM D2896, and (ii) a detergent selected from metal sulfonates, phenates, salicylates, carboxylates, thiophosphonates, and combinations thereof, wherein a TBN of said lubricant composition is from about 20 to about 130 mg KOH/g when tested according to ASTM D2896; and wherein a TBN contribution of said amine to said TBN of said lubricant composition is greater than about 30%.

2 . A lubricant composition as claimed in claim 1 , wherein a TBN contribution of said amine to said TBN of said lubricant composition is greater than a TBN contribution of said detergent to said TBN of said lubricant composition.

3 . A lubricant composition as claimed in claim 1 , wherein said amine is selected from:

and combinations thereof.

4 . A lubricant composition as claimed in claim 1 , wherein said amine has the following structure:

5 . A lubricant composition as claimed in claim 1 , wherein said amine has the following structure:

6 . A lubricant composition as claimed in claim 1 , wherein said amine has the following structure:

7 . A lubricant composition as claimed in claim 1 , wherein said amine has the following structure:

8 . A lubricant composition as claimed in claim 1 , wherein said amine is present in an amount of from about 1 to about 45 wt. % based on the total weight of said lubricant composition.

9 . A lubricant composition as claimed in claim 1 , wherein said detergent comprises an overbased metal and/or said detergent is present in an amount of from about 0.1 to about 35 wt. % based on the total weight of said lubricant composition.

10 . (canceled)

11 . A lubricant composition as claimed in claim 1 , further comprising a polyisobutylene succinic anhydride polyamine and/or a polyalkenyl succinimide polyamine having a weight average molecular weight (M w ) of from about 200 to about 3000 g/mol.

12 . (canceled)

13 . (canceled)

14 . A lubricant composition as claimed in claim 1 , further comprising a base oil selected from American Petroleum Institute (API) Group I oil, API Group II oil, API Group III oil, API Group IV oil, API Group V, and combinations thereof.

15 . (canceled)

16 . (canceled)

17 . A lubricant composition as claimed in claim 1 , further comprising an antifoam agent selected from silicone antifoam agents, acrylate copolymer antifoam agents, and combinations thereof, and wherein said antifoam agent is present in an amount of from about 1 to about 1000 ppm based on the total weight of said lubricant composition.

18 . A lubricant composition as claimed in claim 1 , that remains homogeneous and does not phase separate when exposed to a temperature of 60° C. for 90 days.

19 . A lubricant composition as claimed in claim 1 , having a sulfated ash value of less than about 45,000 ppm when tested according to ASTM D874.

20 . (canceled)

21 . A lubricant composition for a compression-ignition internal combustion engine, said lubricant composition comprising:
(i) an amine as an ashless fuel additive having the following structure:

(ii) a detergent comprising a metal sulfonate, and
(iii) a polybutenyl succinic anhydride polyamine.

22 . A marine cylinder lubricant composition comprising:
(i) an amine as an ashless fuel additive having a total base number (“TBN”) of from about 275 to about 600 mg KOH/g when tested according to ASTM D2896, (ii) a detergent selected from metal sulfonates, phenates, salicylates, carboxylates, thiophosphonates, and combinations thereof, optionally, (iii) a polyalkenyl succinic anhydride polyamine, and (iv) a base oil selected from American Petroleum Institute (API) Group I oil, API Group II oil, API Group III oil, API Group IV oil, API Group V, and combinations thereof, wherein a TBN of said lubricant composition is from about 20 to about 130 mg KOH/g when tested according to ASTM D2896; and wherein a TBN contribution of said amine to said TBN of said lubricant composition is greater than about 30%.

23 . A method of lubricating an internal combustion engine with the lubricant composition as claimed in claim 1 , said method comprising the steps of:
(A) injecting a fuel and the lubricant composition into the cylinder to form a mixture, said lubricant composition comprising:
(i) an amine as an ashless fuel additive having a TBN of from about 275 to about 600 mg KOH/g when tested according to ASTM D2896, and
(ii) a detergent selected from metal sulfonates, phenates, salicylates, and combinations thereof,
wherein a TBN of said lubricant composition is from about 20 to about 130 mg KOH/g when tested according to ASTM D2896; and wherein a TBN contribution of said amine to said TBN of said lubricant composition is greater than about 30%; (B) combusting the mixture comprising the fuel and the lubricant composition via compression-ignition.

24 - 29 . (canceled)

30 . A method of lubricating an internal combustion engine as claimed in claim 23 , wherein the fuel is diesel fuel which includes sulfur.

31 . A method of lubricating an internal combustion engine as claimed in claim 23 , wherein the internal combustion engine is a marine engine.

32 . A method of lubricating an internal combustion engine as claimed in claim 23 , wherein the fuel and the lubricant composition are combined at a ratio of from about 100:1 to about 1000:1.

Assignees

• Basf Se

Inventors

• Desantis Kevin J
• Hoey Michael D
• Jones Stephen R

Classifications

• C10N2040/25

  Internal-combustion engines · CPC title

• C10N2020/04

  Molecular weight; Molecular weight distribution · CPC title

• C10N2030/18

  Anti-foaming property · CPC title

• C10N2030/50

  Emission or smoke controlling properties · CPC title

• C10N2040/252

  Diesel engines · CPC title