Phosphono paraffins

Patent metadata

Field	Value
Publication number	US-11618863-B2
Application number	US-202117536955-A
Country	US
Kind code	B2
Filing date	Nov 29, 2021
Priority date	Jan 11, 2017
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

Aspects described herein generally relate to methods of making a phosphono paraffin comprising forming a reaction mixture by mixing a haloparaffin, a phosphite, and sodium iodide. Methods comprise heating the reaction mixture to form the phosphono paraffin. Aspects described herein further relate to a phosphono paraffin represented by formula (I):wherein each instance of R1 is independentlywherein each instance of R2 and R3 is independently linear or branched C1-20 alkyl, C1-20 cycloalkyl, or aryl; the number of instances where R1 isof formula (I) is between about 2 and about 8; and n is an integer between 4 and 22.

First claim

What is claimed is:

1. A method comprising:
introducing a hydraulic fluid to a hydraulic system of a vehicle, the hydraulic fluid comprising:
a phosphono paraffin represented by formula (I):

wherein:
each instance of R 1 is independently

each instance of R 2 and R 3 is independently C 1-20 alkyl, cycloalkyl of C 20 or less, or aryl;
n is an integer of 4 to 22; and
the number of instances where R 1 is

of formula (I) is about 2 to about 8.

2. The method of claim 1 , wherein the vehicle is an aircraft.

3. The method of claim 1 , wherein the hydraulic system comprises a reservoir, an accumulator, a heat exchanger, a filtering system, or combination(s) thereof.

4. The method of claim 1 , wherein each of R 2 and R 3 is independently C 1-5 alkyl or cycloalkyl of C 6 or less.

5. The method of claim 1 , wherein the number of instances where R 1 is

of formula (I) is about 3 to about 6.

6. The method of claim 1 , wherein n is an integer of about 10 to about 16.

7. The method of claim 1 , wherein each of R 2 and R 3 is independently linear C 1-20 alkyl.

8. The method of claim 1 , wherein each of R 2 and R 3 is independently C 1-5 alkyl or cycloalkyl of C 6 or less.

9. The method of claim 1 , wherein each of R 2 and R 3 are the same.

10. The method of claim 1 , wherein the phosphono paraffin is selected from the group consisting of:

and combination(s) thereof, wherein each of R 1 and R 2 is independently C 1-20 alkyl, cycloalkyl of C 20 or less, or aryl.

11. The method of claim 10 , wherein each of R 1 and R 2 is independently linear C 1-20 alkyl.

12. The method of claim 11 , wherein each of R 1 and R 2 is independently C 1-5 alkyl or cycloalkyl of C 6 or less.

13. The method of claim 12 , wherein R 1 and R 2 are the same.

14. The method of claim 10 , wherein each of R 1 and R 2 is independently isopropyl, butyl, or phenyl.

15. The method of claim 1 , wherein the phosphono paraffin is selected from the group consisting of:

and combination(s) thereof.

16. The method of claim 1 , wherein the phosphono paraffin is selected from the group consisting of:

and combination(s) thereof.

17. The method of claim 1 , wherein the phosphono paraffin is selected from the dram consisting of:

and combination(s) thereof.

18. The method of claim 10 , wherein the phosphono paraffin is selected from the group consisting of:

and combination(s) thereof.

19. The method of claim 1 , wherein each instance of R 2 and R 3 is aryl.

20. The method of claim 1 , wherein the hydraulic fluid further comprises a component selected from the group consisting of a phosphonate, an antioxidant, a mineral oil, a vegetable oil, an ester, a polyalphaolefin, a silicone oil, an alkanol, an alkylated aromatic hydrocarbon, a corrosion inhibitor, and combination(s) thereof.

Assignees

• Boeing Co

Inventors

• Ballard Mathew John
• Casey Philip Stephen
• Holmes Susan Wan-Yi
• Way Cameron David

Classifications

• C10M105/74 Primary

  containing phosphorus · CPC title

• C10M2207/042

  Epoxides · CPC title

• C10M2223/06

  having phosphorus-to-carbon bonds · CPC title

• C10N2040/08

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

• C10M107/50

  containing silicon · CPC title