Cleaning compositions and methods

Patent metadata

Field	Value
Publication number	US-9790457-B2
Application number	US-201615374075-A
Country	US
Kind code	B2
Filing date	Dec 9, 2016
Priority date	Mar 15, 2013
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

The present invention relates, in part, to cleaning methods and solvent cleaning compositions including at least one hydrofluoro-olefin or hydrochlorofluoro-olefin solvent for use in connection with cleaning of metal parts, and in certain preferred embodiments cleaning metal parts to be used in an aircraft.

First claim

What is claimed is:

1. A method of cleaning metal parts to be used in an aircraft comprising:
a. providing a solvent composition comprising at least about 50% by weight of 1-chloro-3,3,3-trifluoropropene (1233zd): and
b. contacting the metal part to be used in an aircraft with said solvent composition, said metal part comprising a metal or a metal alloy selected from titanium and titanium alloys; zinc and zinc alloys; tungsten and tungsten alloys; copper and copper alloys; Inconel-Ni alloys; cadmium and cadmium alloys; stainless steels; gold and gold alloys; and silver and silver alloys.

2. The method of claim 1 wherein said contacting step comprises spraying said metal part with said solvent composition.

3. The method of claim 1 wherein said contacting step comprises immersing said metal part in said solvent composition.

4. The method of claim 1 wherein said solvent composition is in a liquid phase during said immersing step.

5. The method of claim 1 wherein said solvent composition is in a vapor phase during said immersing step.

6. The method of claim 1 wherein said metal part comprises a metal or a metal alloy selected from tungsten carbide, silver braze alloys, and 440C stainless steel.

7. The method of claim 1 wherein said metal part comprises a cadmium plated components or part.

8. The method of claim 2 wherein said solvent composition further comprises methanol.

9. The method of claim 2 wherein said solvent composition further comprises ethanol.

10. The method of claim 8 wherein said ethanol is present in the composition in an amount of from about one to about 10% by weight of the composition.

11. The method of claim 8 wherein said ethanol is present in the composition in an amount of from about one to about 5% by weight of the composition.

12. The method of claim 1 wherein said metal part is contaminated with cutting oil prior to said contacting step.

13. The method of claim 8 wherein said methanol is present in the composition in an amount of from about one to about 10% by weight of the composition.

14. The method of claim 8 wherein said methanol is present in the composition in an amount of from about one to about 5% by weight of the composition.

15. The method of claim 12 wherein at least a portion of said cutting oil is removed by said contacting step.

16. A method of repairing or maintaining an aircraft engine containing metal parts, said method comprising cleaning a metal part of the aircraft engine by steps that include contacting the metal part with a solvent composition comprising at least about 50% by weight of 1-chloro-3,3,3-trifluoropropene (1233zd), said metal part comprising a metal or a metal alloy selected from titanium and titanium alloys; zinc and zinc alloys; tungsten and tungsten alloys; copper and copper alloys; Inconel-Ni alloys; cadmium and cadmium alloys; stainless steels; gold and gold alloys; and silver and silver alloys.

17. The method of claim 1 wherein said solvent composition consists essentially of 1-chloro-3,3,3-trifluoropropene (1233zd).

18. The method of claim 1 wherein said solvent composition consists essentially of trans1-chloro-3,3,3-trifluoropropene (1233zd).

Assignees

• Honeywell Int Inc

Inventors

• Hulse Ryan
• Cook Kane D

Classifications

• B08B3/08

  the liquid having chemical or dissolving effect · CPC title

• B08B5/00

  Cleaning by methods involving the use of air flow or gas flow (cleaning hollow articles by methods or apparatus specially adapted thereto B08B9/00) · CPC title

• C11D7/5018

  Halogenated solvents · CPC title

• C11D11/0029

  Chemistry & Metallurgy · mapped topic

• C11D7/5022

  containing oxygen · CPC title