Dielectric fluid with farnesene-based oligomer

Patent metadata

Field	Value
Publication number	US-9490047-B2
Application number	US-201214366237-A
Country	US
Kind code	B2
Filing date	Dec 5, 2012
Priority date	Dec 30, 2011
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

The present disclosure is directed to a dielectric fluid comprising a farnesene-based oligomer and an antioxidant and devices containing the dielectric fluid.

First claim

What is claimed is:

1. A dielectric fluid comprising:
a farnesene-based oligomer having a molecular weight from 600 g/mol to 2500 g/mol; and
an antioxidant.

2. The dielectric fluid of claim 1 wherein the farnesene-based oligomer comprises a genetically-modified farnesene.

3. The dielectric fluid of claim 1 comprising from 0.1 wt % to 2.0 wt % antioxidant.

4. The dielectric fluid of claim 1 wherein the farnesene-based oligomer comprises a farnesene trimer.

5. The dielectric fluid of claim 1 wherein the farnesene-based oligomer is a farnesene/terpenoid oligomer with the structure (IV)
-[F] m -[T] n -  (IV)

wherein F represents units derived from farnesene;
T represents units derived from terpenoid; and
each of m and n is an integer from 1 to 9.

6. The dielectric fluid of claim 5 wherein the farnesene/terpenoid oligomer comprises from 70 wt % to 99 wt % units derived from farnesene and from 30 wt % to 1 wt % units derived from terpenoid.

7. The dielectric fluid of claim 5 wherein the terpenoid is selected from the group consisting of zingiberene, bisabolene, farnesene epoxide, farnesol, squalene, ergosol, and combinations thereof.

8. The dielectric fluid of claim 1 comprising a blend component selected from the group consisting of a microbial oil, a vegetable oil, a seed oil, a mineral oil, silicon fluid, a synthetic ester, a poly-alpha-olefin, and combinations thereof.

9. A device comprising:
an electrical component; and
a dielectric fluid in operative communication with the electrical component, the dielectric fluid comprising
a farnesene-based oligomer having a molecular weight from 600 g/mol to 2500 g/mol; and

an antioxidant.

10. The device of claim 9 wherein the electrical component comprises a cellulose-based insulation material in contact with the dielectric fluid.

11. The device of claim 9 wherein the electrical component is selected from the group consisting of a transformer, a capacitor, a switch, a regulator, a circuit breaker, a recloser, a fluid-filled transmission line, and combinations thereof.

12. The dielectric fluid of claim 5 wherein and 3≦m+n≦10.

13. The dielectric fluid of claim 1 having
(i) a viscosity less than 50 cSt at 40° C.;
(ii) a fire point temperature greater than 300° C.; and
(iii) a pour point less than −20° C.

14. The dielectric fluid of claim 1 having a dissipation factor less than 0.5% at 25° C., as measured in accordance with ASTM D 924.

15. The dielectric fluid of claim 1 have an acidity less than 0.03 mg KOH/g as measured in accordance with ASTM D 974.

16. The dielectric fluid of claim 1 having an electrical conductivity less than 1 pS/m at 25° C. as measured in accordance with ASTM D 2624.

17. The dielectric fluid of claim 1 having a flash point of at least 145° C. as measured in accordance with ASTM D 92.

18. The dielectric fluid of claim 1 having a fire point temperature greater than 300° C. as measured in accordance with ASTM D 92.

19. The dielectric fluid of claim 1 having a pour point temperature less than −20° C. as measured in accordance with ASTM D 97.

20. The dielectric fluid of claim 1 having a water saturation point of less than or equal to 50 ppm as measured in accordance with ASTM D 1533.

Assignees

• Dow Global Technologies Llc

Inventors

• Han Suh Joon
• Maurer Brian R
• Zhang Xiaodong

Classifications

• H05K7/20218

  using a liquid coolant without phase change in electronic enclosures (in cabinets of standardized dimensions H05K7/20536; in server cabinets H05K7/20709; in vehicle electronic casings H05K7/20845; in power control electronics H05K7/2089; in displays H05K7/20954) · CPC title

• H01B3/22

  hydrocarbons · CPC title

• H01B3/20 Primary

  liquids, e.g. oils (silicone oils H01B3/46) · CPC title