Ether-containing monoester compound and use thereof

Patent metadata

Field	Value
Publication number	US-10077229-B2
Application number	US-201414913170-A
Country	US
Kind code	B2
Filing date	Jul 11, 2014
Priority date	Sep 20, 2013
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

A compound of the present invention is represented by the general formula (1) and has a 40° C. kinetic viscosity (v) that satisfies 4 mm 2 /s≤v≤30 mm 2 /s,

C n H 2n+1 —(O—CH 2 CH 2 ) p —O—(CH 2 ) 3 —(C═O)—O—C m H 2m+1   (1)
(where O represents an oxygen atom, C represents a carbon atom, H represents a hydrogen atom, m is an integer of 1 to 18, n is an integer of 1 to 12, p is an integer of 1 to 3, and 2≤n+m≤30 is satisfied). The present invention provides (i) a lubricant excellent in energy-saving, heat resistance, and low-temperature fluidity and (ii) use of the lubricant.

First claim

The invention claimed is:

1. A compound being represented by the following general formula (1):
C n H 2n+1 —(O—CH 2 CH 2 ) p —O—(CH 2 ) 3 —(C═O)—O—C m H 2m+1   (1)

wherein O represents an oxygen atom, C represents a carbon atom, H represents a hydrogen atom, m is an integer of 10 to 14, n is an integer of 4 to 8, p is an integer of 2 to 3, and 14≤n+m≤22 is satisfied;
wherein the compound has:
a 40° C. kinetic viscosity (v) that satisfies 4 mm 2 /s v 30 mm 2 /s;
a viscosity index of not less than 160;
a solidification temperature of not higher than −10° C.;
an amount of evaporation of not more than 20 wt %; and
an acid value of not more than 1 mg KOH/g.

2. The compound as set forth in claim 1 , wherein in the general formula (1), p is 2, and
the 40° C. kinetic viscosity (v) satisfies 4 mm 2 /s≤v≤20 mm 2 /s.

3. The compound as set forth in claim 1 , wherein in the general formula (1), p is 3.

4. The compound as set forth in claim 1 , wherein m, n and p are 12, 8, and 2, respectively, in the general formula (1).

5. The compound as set forth in claim 1 , wherein m, n and p are 14, 8, and 2, respectively, in the general formula (1).

6. The compound as set forth in claim 1 , wherein m, n and p are 10, 8, and 2, respectively, in the general formula (1).

7. A lubricant comprising a compound as set forth in claim 1 .

8. The lubricant as set forth in claim 7 , which is a lubricant for a fluid dynamic bearing or a lubricant for an impregnated bearing.

9. A bearing which is lubricated with use of a lubricant as set forth in claim 7 .

10. The bearing as set forth in claim 9 , which is a fluid dynamic bearing or an impregnated bearing.

11. A method of lubricating a bearing, comprising the step of lubricating the bearing with use of a lubricant as set forth in claim 7 .

12. A motor comprising a bearing as set forth in claim 9 .

13. A method of producing a grease, using a lubricant as set forth in claim 7 .

14. A grease comprising a lubricant as set forth in claim 7 .

15. A freezer oil comprising a compound as set forth in claim 1 .

Assignees

• Moresco Corp

Inventors

• Maruyama Shingo
• Nakacho Yoshifumi

Classifications

• C10N2050/10

  semi-solid; greasy · CPC title

• C10N2020/04

  Molecular weight; Molecular weight distribution · CPC title

• C10N2040/30

  Refrigerators lubricants {or compressors lubricants} · CPC title

• C10N2040/175

  Pantographs, i.e. printing devices · CPC title

• C10N2040/02

  Bearings · CPC title