# US 2014/0194329 A1 · Lubricant composition for internal combustion engine oil

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- Number: US 2014/0194329 A1
- Document ID: US20140194329A1
- Status: Published application
- Kind: A1
- Application number: 14/236,190
- Filed: 2012-08-03
- Published: 2014-07-10
- Earliest claimed: 2011-08-03
- Assignees: Idemitsu Kosan Co., Ltd.
- Inventors: Yasunori Shimizu; Hiroshi Fujita
- Web page: https://patentgrep.com/patent/US20140194329A1

## CPC

- C10M 141/12: at least one of them being an organic compound containing atoms of elements not provided for in groups C10M141/02 - C10M141/10
- C10M 133/56: Amides; Imides
- C10M 169/045: {the additives being a mixture of compounds of unknown or incompletely defined constitution and non-macromolecular compounds}
- C10M 2203/1025: used as base material
- C10M 2207/026: with tertiary alkyl groups
- C10M 2207/262: derived from hydroxy substituted aromatic acids, e.g. salicylates
- C10M 2215/064: Di- and triaryl amines
- C10M 2215/08: Amides [having hydrocarbon substituents containing less than thirty carbon atoms]
- C10M 2215/223: Five-membered rings containing nitrogen and carbon only
- C10M 2215/28: Amides; Imides
- C10M 2219/082: containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M 2219/085: containing carboxyl groups; Derivatives thereof
- C10M 2223/045: Metal containing thio derivatives
- C10M 2229/02: Unspecified siloxanes; Silicones
- C10N 2010/04: Groups 2 or 12
- C10N 2020/04: Molecular weight; Molecular weight distribution
- C10N 2030/06: Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
- C10N 2030/42: {Phosphor free or low phosphor content compositions}
- C10N 2030/43: {Sulfur free or low sulfur content compositions}
- C10N 2030/44: {Boron free or low content boron compositions}
- C10N 2030/45: {Ash-less or low ash content}
- C10N 2040/25: Internal-combustion engines
- C10N 2060/14: by boron or a compound containing boron
- C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33)
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS

## Abstract

The present invention provides a lubricating oil composition for internal combustion engines which includes a boronated imide-based dispersant, or the boronated imide-based dispersant and a non-boronated imide-based dispersant, in which a boron content (B % by mass) derived from the boronated imide-based dispersant and a nitrogen content (N % by mass) derived from the boronated imide-based dispersant or derived from the boronated imide-based dispersant and the non-boronated imide-based dispersant satisfy the following formula (I): N≧B+0.05 (I); and a phosphorus content (P % by mass) and a content of a metal component (M % by mass) derived from a metallic detergent on the basis of a total amount of the composition satisfy any of the following requirements A to C: A: P<0.03 and M<0.05; B: P<0.03 and 0.05≦M≦0.12; and C: 0.03≦P≦0.06 and M<0.05. The lubricating oil composition for internal combustion engines can be considerably reduced in content of ZnDTP having a large phosphorus content or a metallic detergent while maintaining a good wear resistance for aluminum materials.

## Claims

### Claim 1

A lubricating oil composition comprising a boronated imide-based dispersant, or comprising the boronated imide-based dispersant and a non-boronated imide-based dispersant, in which a boron content B, in mass %, of the boronated imide-based dispersant and a nitrogen content N, in mass %, of the boronated imide-based dispersant or the boronated imide-based dispersant and the non-boronated imide-based dispersant satisfy formula (I):
N≧B+0.05 (I),
and a phosphorus content P, in mass %, and a content M, in mass %, of a metal component of a metallic detergent on the basis of a total amount of the composition satisfy any one of the following requirements A to C:
A: P<0.03 and M<0.05;
B: P<0.03 and 0.05≦M≦0.12; and
C: 0.03≦P≦0.06 and M<0.05.

### Claim 2 (depends on 1)

The lubricating oil composition of claim 1, wherein B and N satisfy formula (II):
N≧B+0.1 (II).

### Claim 3 (depends on 1)

The lubricating oil composition of claim 1, further comprising an anti-wear agent comprising sulfur.

### Claim 4 (depends on 3)

The lubricating oil composition of claim 3, wherein the anti-wear agent is a disulfide compound represented by formula (3):
R1OOC-A1-S2-A2-COOR2 (3)
wherein R1 and R2 are each independently a hydrocarbon group having 1 to 30 carbon atoms which may comprise an oxygen atom, a sulfur atom or a nitrogen atom; and A1 and A2 are each independently a divalent hydrocarbon group having 1 to 12 carbon atoms.

### Claim 5 (depends on 1)

The lubricating oil composition of claim 1, comprising the boronated imide-based dispersant and the non-boronated imide-based dispersant.

### Claim 6 (depends on 1)

The lubricating oil composition of claim 1, wherein P and M satisfy requirement A.

### Claim 7 (depends on 1)

The lubricating oil composition of claim 1, wherein P and M satisfy requirement B.

### Claim 8 (depends on 1)

The lubricating oil composition of claim 1, wherein P and M satisfy requirement C.

### Claim 9 (depends on 2)

The lubricating oil composition of claim 2, comprising the boronated imide-based dispersant and the non-boronated imide-based dispersant.

### Claim 10 (depends on 2)

The lubricating oil composition of claim 2, wherein P and M satisfy requirement A.

### Claim 11 (depends on 2)

The lubricating oil composition of claim 2, wherein P and M satisfy requirement B.

### Claim 12 (depends on 2)

The lubricating oil composition of claim 2, wherein P and M satisfy requirement C.

### Claim 13 (depends on 2)

The lubricating oil composition of claim 2, further comprising an anti-wear agent comprising sulfur.