Lubricating composition for a marine engine

Patent metadata

Field	Value
Publication number	US-2016017251-A1
Application number	US-201414772997-A
Country	US
Kind code	A1
Filing date	Mar 5, 2014
Priority date	Mar 6, 2013
Publication date	Jan 21, 2016
Grant date	—

Abstract

The present invention relates to a lubricant composition for a marine engine, in particular for a four-stroke or two-stroke marine engine, comprising at least one base oil, at least one alkoxylated fatty amine, at least one hydrogenated styrene-isoprene copolymer and at least one detergent.

First claim

1 .- 20 . (canceled)

21 . Lubricant composition for a 4-stroke or 2-stroke marine engine, comprising:
a) at least one base oil, b) at least one alkoxylated fatty amine, c) at least one hydrogenated styrene-isoprene copolymer, d) at least one detergent.

22 . Lubricant composition according to claim 21 in which the alkoxylated fatty amine is obtained from fatty acids comprising from 10 to 24 carbon atoms.

23 . Lubricant composition according to claim 21 comprising at least one alkoxylated fatty amine of formula (I)

in which:
R 3 represents an alkane-di-yl group comprising from 2 to 10 carbon atoms;
R 4 represents a linear or branched, saturated or unsaturated, alkyl group comprising from 12 to 22 carbon atoms;
R 5 represents an alkane-di-yl group comprising from 1 to 10 carbon atoms;
m represents an integer ranging from 0 to 12;
n represents an integer ranging from 0 to 12;
p represents an integer ranging from 0 to 12;
q represents 0 or 1;
the sum m+n+p is strictly greater than 0.

24 . Lubricant composition according to claim 23 in which:
R 3 represents an alkane-di-yl group comprising from 2 to 4 carbon atoms;
R 4 represents a linear or branched, saturated or unsaturated, alkyl group comprising from 16 to 20 carbon atoms;
R 5 represents an alkane-di-yl group comprising from 2 to 4 carbon atoms;
m represents 0, 1, 2, 3, 4 or 5;
n represents 0, 1, 2, 3, 4 or 5;
p represents 0, 1, 2, 3, 4 or 5;
q represents 0 or 1;
the sum m+n+p represents an integer ranging from 1 to 15.

25 . Lubricant composition according to claim 21 comprising at least one alkoxylated fatty amine of formula (Ia):

in which:
R 3 represents an alkane-di-yl group comprising from 2 to 4 carbon atoms;
R 4 represents a linear or branched, saturated or unsaturated, alkyl group comprising from 16 to 20 carbon atoms;
m represents 0, 1 or 2;
n represents 0, 1 or 2;
the sum m+n represents an integer ranging from 1 to 4.

26 . Lubricant composition according to claim 21 in which the hydrogenated styrene-isoprene copolymer has a content of hydrogenated isoprene units ranging from 50% to 98% with respect to the mass of hydrogenated styrene-isoprene copolymer.

27 . Lubricant composition according to claim 21 in which the hydrogenated styrene-isoprene copolymer has a content of styrene units ranging from 2% to 50% with respect to the mass of hydrogenated styrene-isoprene copolymer.

28 . Lubricant composition according to claim 21 in which the detergent is chosen from the alkali or alkaline-earth metal salicylates or phenates, alone or in a mixture.

29 . Lubricant composition according to claim 28 in which the detergent is chosen from calcium salicylates or calcium phenates, alone or in a mixture.

30 . Lubricant composition according to claim 21 also comprising a dispersant.

31 . Lubricant composition according to claim 30 in which the dispersant is chosen from the compounds comprising at least one succinimide group.

32 . Lubricant composition according to claim 30 in which the dispersant is chosen from the borated compounds comprising at least one succinimide group.

33 . Lubricant composition according to claim 21 in which the base oil is chosen from the base oils of Group I or Group II, alone or in a mixture.

34 . Lubricant composition according to claim 21 , also comprising at least one additional additive chosen from anti-wear additives, antioxidants, additional polymers improving the viscosity index, pour point improvers, anti-foaming agents, thickeners and mixtures thereof.

35 . Lubricant composition according to claim 21 having a BN determined according to the ASTM D-2896 standard, from 5 to 100 mg of KOH/g of lubricant composition.

36 . Lubricant composition according to claim 21 having a kinematic viscosity measured according to the ASTM D7279 standard at 100° C. comprised between 5.6 and 26.1 cSt.

37 . Lubricant composition according to claim 21 having a BN determined according to the ASTM D-2896 standard, from 7 to 80 mg of KOH/g of lubricant composition.

38 . Lubricant composition according to claim 21 having a kinematic viscosity measured according to the ASTM D7279 standard at 100° C. comprised between 9.3 and 21.9 cSt.

39 . Method for reducing the fuel consumption of 4-stroke or 2-stroke marine engines, comprising adding a lubricant composition according to claim 21 into the marine engines.

40 . Method for improving the engine cleanliness of 4-stroke or 2-stroke marine engines, comprising adding at least one alkoxylated fatty amine in a lubricant composition for 2-stroke or 4-stroke marine engines comprising at least one base oil, at least one hydrogenated styrene-isoprene copolymer and at least one detergent.

Assignees

• Total Marketing Services

Inventors

• Amblard Catherine
• Gonneaud Christian

Classifications

• C10M2203/1025

  used as base material · CPC title

• C10N2030/04

  Detergent property or dispersant property · CPC title

• C10N2040/252

  Diesel engines · CPC title

• C10M2223/045

  Metal containing thio derivatives · CPC title

• C10N2010/04

  Groups 2 or 12 · CPC title