Lubricating oil additives

Patent metadata

Field	Value
Publication number	US-10876064-B2
Application number	US-201816201045-A
Country	US
Kind code	B2
Filing date	Nov 27, 2018
Priority date	Nov 29, 2017
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

A lubricating composition comprises a major amount of an oil of lubricating viscosity and 0.01 to 25 percent by mass, based on the mass of the composition of an oil-soluble copolymer. The copolymer comprises units (a) and units (b):

—N(COR 1 )CH 2 CH 2 —  (a)

—N(COR 2 )CH 2 CH 2 CH 2 —  (b)

wherein the polymer carries an inorganic or organic nucleophilic polymerisation terminating group (t), and an initiator group (i) connected to the N atom of a repeat unit (a) or (b), the initiator group (i) being effective to initiate the polymerisation of linear, branched or cyclic hydrocarbyl moieties. R 1 and R 2 are the same or different and comprise a single or a mixture of linear, branched or cyclic hydrocarbyl groups having 1-50 carbon atoms, some or all having 12-50 carbon atoms, or of at least one macro-monomeric hydrocarbyl group with more than 50 carbon atoms.

First claim

What is claimed is:

1. A lubricating composition comprising a major amount of an oil of lubricating viscosity and 0.01 to 25 percent by mass, based on the mass of the composition of an oil-soluble copolymer comprising units (a) and units (b):
—N(COR 1 )CH 2 CH 2 —  (a)

—N(COR 2 )CH 2 CH 2 CH 2 —  (b)

wherein the polymer carries an inorganic or organic nucleophilic polymerisation terminating group (t), and an initiator group (i) connected to the N atom of a repeat unit (a) or (b), the initiator group (i) being effective to initiate the polymerisation of linear, branched or cyclic hydrocarbyl moieties; and
wherein each R 1 and each R 2 are the same or different and independently comprise a single or a mixture of linear, branched or cyclic hydrocarbyl groups having 1-50 carbon atoms, or of at least one macro-monomeric hydrocarbyl group with more than 50 carbon atoms;
with the proviso that when R 1 and R 2 comprise linear, branched or cyclic hydrocarbyl groups having 1-50 carbon atoms, the R 1 and/or R 2 of at least one of said units (a) and/or (b) is a linear, branched or cyclic hydrocarbyl groups having 12-50 carbon atoms.

2. A lubricating composition according to claim 1 wherein units (a) comprise from 1 to 99 mol % of the copolymer and units (b) comprise from 1 to 99 mol % of the copolymer.

3. A lubricating composition according to claim 2 wherein the copolymer comprises 50 mol % of units (a) and 50 mol % of units (b).

4. A lubricating composition according to claim 1 wherein the copolymer is a statistical copolymer or a random copolymer.

5. A lubricating composition according to claim 1 wherein the copolymer is an alternating copolymer, a periodic copolymer or a block copolymer.

6. A lubricating composition according to claim 1 wherein the copolymer has a linear architecture.

7. A lubricating composition according to claim 1 wherein the copolymer has a branched or star architecture.

8. A lubricating composition according to claim 1 wherein each R 1 and each R 2 is the same or different and contain 1 to 36 carbon atoms, provided that at least one of groups R 1 and/or R 2 have 12 to 36 carbon atoms.

9. A lubricating composition according to claim 1 wherein the copolymer has a number average molecular weight (Mn) of 2,000-500.000 g/mol, as measured by Gel Permeation Chromatography with reference to linear narrow poly(methylmethacrylate) standards in the range of 550 to 600,000 g/mol.

10. A lubricating composition according to claim 1 wherein one of groups R 1 and R 2 comprise unsaturated hydrocarbyl groups having between 8 and 20 carbon atoms, and the other of groups R 1 and R 2 is saturated.

11. A lubricating composition according to claim 1 wherein both of groups R 1 and R 2 comprise unsaturated hydrocarbyl groups having between 16 and 20 carbon atoms.

12. A lubricating composition according to claim 1 wherein at least 5% of the total number of either or both of the groups R 1 and R 2 in the polymer comprise unsaturated hydrocarbyl groups having between 8 and 20 carbon atoms.

13. A lubricating composition according to claim 1 wherein at least 5% of the total number of either or both of the groups R 1 and R 2 in the polymer comprise unsaturated hydrocarbyl groups having 17 carbon atoms.

14. A lubricating composition according to claim 1 wherein at least 50% of the total number of either or both of the groups R 1 and R 2 in the polymer comprise singly, doubly or triply-unsaturated C 17 alkenyl groups or any mixture thereof.

15. A lubricating composition according to claim 1 wherein either or both of groups R 1 and R 2 are obtained from natural fatty acids.

16. A lubricating composition according to claim 1 comprising one or more co-additives, different from the oil-soluble copolymer, selected from one or more phosphorus-containing compounds; oxidation inhibitors or anti-oxidants; dispersants; metal-containing detergents; anti-wear agents; friction modifiers; and viscosity modifiers.

17. A lubricating composition according claim 1 comprising at least 60% by mass, of an oil of lubricating viscosity.

18. A method of lubricating the crankcase of an internal combustion engine comprising operating the engine and lubricating the crankcase with a lubricating composition of claim 1 .

Assignees

• Infineum Int Ltd

Inventors

• Schwarz Andrew D
• Hartweg Manuel
• Cattoz Beatrice
• Phillips Daniel J
• Strong Anthony J
• Becer Remzi

Classifications

• C10M149/22

  Polyamines · CPC title

• C10N2030/04

  Detergent property or dispersant property · CPC title

• C10M2207/40

  Fatty vegetable or animal oils · CPC title

• C10M169/04 Primary

  Mixtures of base-materials and additives · CPC title

• C10N2030/12

  Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives · CPC title