Additive concentrates

Patent metadata

Field	Value
Publication number	US-10781392-B2
Application number	US-201715465665-A
Country	US
Kind code	B2
Filing date	Mar 22, 2017
Priority date	Mar 22, 2016
Publication date	Sep 22, 2020
Grant date	Sep 22, 2020

Abstract

The use of polyalkylenyl succinic anhydrides to stabilize an additive concentrate which includes a salicylate detergent and a nitrogen-free ashless organic friction modifier.

First claim

The invention claimed is:

1. An additive concentrate for use in forming a lubricating oil composition, the additive concentrate comprising diluent oil of lubricating viscosity present in a minor amount of less than 50 mass %, based on the total mass of the additive concentrate, and a plurality of oil-soluble or oil-dispersible additives contained therein, wherein the combined amount of all of said plurality of additives in the additive concentrate is greater than 50 mass % on an active ingredient basis, based on the total mass of the additive concentrate, and wherein the plurality of additives include the following additives:
(A) one or more oil-soluble or oil-dispersible overbased alkaline earth metal salicylate detergent(s) having a TBN at 100% active mass of at least 150 mg KOH/g, as measured in accordance with ASTM D2896 present in an amount of from 5 to 25 mass % on an active ingredient basis, based on the total mass of the additive concentrate;
(B) one or more oil-soluble or oil-dispersible ashless nitrogen-free organic friction modifier(s) which is one or more aliphatic (C 7 to C 29 )hydrocarbyl fatty acid ester(s) present in an amount of from 1.0 to 10.0 mass % on an active ingredient basis, based on the total mass of the additive concentrate; and,
(C) one or more oil-soluble or oil-dispersible poly(C 2 to C 6 )alkylenyl succinic anhydride(s) present in an effective amount to stabilise the additive concentrate, wherein the average succination ratio (SR) of the one or more poly(C 2 to C 6 )alkylenyl succinic anhydride(s) is from about 1.35 to about 3.5, in an amount of from 1.5 to 7.5 mass % on an active ingredient basis, based on the total mass of the additive concentrate.

2. An additive concentrate as claimed in claim 1 , wherein the average succination ratio of the one or more poly(C 2 to C 6 )alkylenyl succinic anhydride(s) is greater than or equal to 1.4.

3. An additive concentrate as claimed in claim 1 , wherein the number average molecular weight (M n ) of the poly(C 2 to C 6 )alkylenyl chain(s) of the one or more poly(C 2 to C 6 )alkylenyl succinic anhydride(s) is greater than or equal to 1250 daltons.

4. An additive concentrate as claimed in claim 1 , wherein the average saponification value (SAP value) of the one or more poly(C 2 to C 6 )alkylenyl succinic anhydride(s) is greater than or equal to 45, as measured in accordance with ASTM D94.

5. An additive concentrate as claimed in claim 1 , wherein the one or more poly(C 2 to C 6 )alkylenyl succinic anhydride(s) is one or more polyisobutylenyl succinic anhydride(s) (PIBSA(s)).

6. An additive concentrate as claimed in claim 1 , wherein the one or more poly(C 2 to C 6 )alkylenyl succinic anhydride(s) is present in amount of from 3.0 to 5.0 mass % on an active ingredient basis, based on the total mass of the additive concentrate.

7. An additive concentrate as claimed in claim 1 , wherein the one or ore aliphatic (C 7 to C 29 )hydrocarbyl fatty acid ester(s) is the ester reaction product of one or more aliphatic (C 7 to C 29 )hydrocarbyl fatty acid(s), or a reactive derivative(s) thereof, and one or more alkanol(s).

8. An additive concentrate as claimed in claim 7 , wherein the one or more alkanol(s) is a polyhydric (C 2 to C 20 )alkanol(s).

9. An additive concentrate as claimed in claim 8 , wherein the polyhydric (C 2 to C 20 )alkanol(s) is glycerol.

10. An additive concentrate as claimed in claim 1 , wherein the one or more aliphatic (C 7 to C 29 )hydrocarbyl fatty acid ester(s) is glycerol mono-oleate (GMO).

11. An additive concentrate as claimed in claim 1 , wherein the one or more alkaline earth metal salicylate detergent(s) is one or more calcium salicylate detergent(s).

Assignees

• Infineum Int Ltd

Inventors

• Woodward Philip J
• Marsh Adam P

Classifications

• C10M163/00 Primary

  Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential · CPC title

• C10M127/06

  Alkylated aromatic hydrocarbons · CPC title

• C10M125/04 Primary

  Metals; Alloys · CPC title

• C10M169/04

  Mixtures of base-materials and additives · CPC title

• C10N2040/25

  Internal-combustion engines · CPC title