Shock absorber oil composition

Patent metadata

Field	Value
Publication number	US-2016152918-A1
Application number	US-201615014207-A
Country	US
Kind code	A1
Filing date	Feb 3, 2016
Priority date	Jan 31, 2012
Publication date	Jun 2, 2016
Grant date	—

Abstract

A shock absorber oil composition of the invention includes a base oil: (A) at least one of phosphate, amine phosphate salt, phosphite and amine phosphite salt; (B) an amide compound; and (C) an N-substituted derivative of sarcosine.

First claim

1 - 5 . (canceled)

6 . A method, comprising absorbing vibrations with a shock absorber, said shock absorber comprising a shock absorber oil composition, wherein the shock absorber oil composition comprises:
a base oil: a component (A) that is at least one of phosphate, amine phosphate salt, phosphite and amine phosphite salt; a component (B) that is an amide compound; and a component (C) that is an N-substituted derivative of sarcosine.

7 . The method according to claim 6 , wherein the component (A) has an alkyl group or an alkenyl group, and the alkyl group and the alkenyl group has 12-20 carbon atoms.

8 . The method according to claim 6 , wherein the component (B) has an alkyl group, and the alkyl group has 12 to 20 carbon atoms.

9 . The method according to claim 6 , wherein an N-substituent in the component (C) has 12 to 20 carbon atoms.

10 . The method according to claim 6 , wherein
a content of the component (A) is in a range of 0.1 mass % to 1 mass % of the total amount of the shock absorber oil composition, a content of the component (B) is in a range of 0.1 mass % to 1 mass of the total amount of the shock absorber oil composition, and a content of the component (C) is in a range of 0.1 mass % to 1 mass % of the total amount of the shock absorber oil composition.

11 . The method according to claim 6 , wherein the base oil is a paraffinic mineral oil or a naphthenic mineral oil.

12 . The method according to claim 6 , wherein the component (A) is selected from the group consisting of an acidic phosphate of phosphoric acid and lauryl alcohol or oleyl alcohol, an amine salt of acidic phosphate of phosphoric acid and lauryl alcohol or oleyl alcohol, a phosphite of phosphorous acid and lauryl alcohol or oleyl alcohol, and an amine salt of the phosphite of phosphorous acid and lauryl alcohol or oleyl alcohol.

13 . The method according to claim 6 , wherein the component (B) is selected from the group consisting of a lauric acid amide, myristic acid amide, palmitic acid amide and stearic acid amide.

14 . The method according to claim 6 , wherein the component (B) is a stearic acid amide.

15 . The method according to claim 6 , wherein the component (C) is selected from the group consisting of N-oleylsarcosine, N-lauroylsarcosine, N-myristoylsarcosine, and N-palmitoylsarcosine.

16 . The method according to claim 6 , wherein for said shock absorber oil composition:
(i) a high-speed intermetal friction coefficient at a speed of 10 mm/s is 0.12 or less, (ii) a low-speed intermetal friction coefficient at a speed of 0.3 mm/s is 0.11 or less, and (iii) a ratio of the low-speed intennetal friction coefficient to the high-speed intermetal friction coefficient is 0.95 or less.

17 . The method according to claim 6 , wherein the shock absorber oil composition further comprises at least one additive selected from the group consisting of a viscosity index improver, pour point depressant, detergent dispersant, antioxidant, antiwear agent/extreme pressure agent, friction reducing agent, metal deactivator, rust inhibitor, surfactant; anti-emulsifier, antifoaming agent, anticorrosive agent, friction modifier, oiliness agent, and acid scavenger.

18 . The method according to claim 6 , wherein
the shock absorber oil composition further comprises a viscosity index improver, and a content of the viscosity index improver is in a range from 0.5 mass % to 15 mass % based on the total amount of the composition.

Assignees

• Idemitsu Kosan Co

Inventors

• Aoki Aya

Classifications

• C10N2010/04

  Groups 2 or 12 · CPC title

• C10N2040/08

  Hydraulic fluids, e.g. brake-fluids · CPC title

• C10N2030/06

  Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title

• C10M2219/044

  Sulfonic acids, Derivatives thereof, e.g. neutral salts · CPC title

• C10M2215/28

  Amides; Imides · CPC title