Cleaning compositions and methods
AssigneeHoneywell International Inc.
InventorsRyan Hulse, Kane D Cook
Life of this patent
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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.
Claims18
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.
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.
Dependencies are inferred from the claim text.