HIGH TEMPERATURE DRY FILM LUBRICANT

• US 20190315976A1
• Filed: 10/13/2017
• Published: 10/17/2019
• Est. Priority Date: 12/09/2016
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Niday, David Andrew, Budinger, Vicky S., Morra, Martin M., Zhou, Hong, Fu, Qijia, Gu, Yanfei, Wang, Shizhong, Li, Xiaxi
• Granted Patent: US 10,829,650 B2
• Time in Patent Office: Days
• CPC Class Codes: C08K 2003/323 Ammonium polyphosphate
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08K 3/08 Metals
• CPC Class Codes: C08K 3/32 Phosphorus-containing compounds
• CPC Class Codes: C08K 5/098 Metal salts of carboxylic acids
• CPC Class Codes: C08K 5/17 Amines; Quaternary ammonium compounds
• CPC Class Codes: C08K 5/56 Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
• CPC Class Codes: C08L 63/04 Epoxynovolacs
• CPC Class Codes: C09D 5/00 Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced electrically insulating plastics, resins or waxes H01B3/30; Filling pastes
• CPC Class Codes: C09D 7/00 Features of coating compositions, not provided for in group C09D5/00 driers C09F9/00; Processes for incorporating ingredients in coating compositions
• CPC Class Codes: C09D 7/61 inorganic
• CPC Class Codes: C09D 7/63 organic
• CPC Class Codes: C10M 177/00 Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
• CPC Class Codes: C10M 2209/105 of alkylene oxides containing three carbon atoms only
• CPC Class Codes: C10N 2050/02 dissolved or suspended in a carrier which subsequently evaporates to leave a lubricant coating

Abstract

A coating precursor slurry is provided, along with its methods of formation and use. The coating precursor slurry may include an organic binder comprising a polymeric component and a hardening reagent; an inorganic binder comprising an aluminum-nitrogen compound, a barium-containing organic compound, a nickel-containing organic compound, an ammonia polyphosphate, and phosphorus pentoxide; active components comprising Mo, Te, and graphite; and a solvent.

Claims

1. A coating precursor slurry, comprising:

an organic binder comprising a polymeric component and a hardening reagent;

an inorganic binder comprising an aluminum-nitrogen compound, a barium-containing organic compound, a nickel-containing organic compound, an ammonia polyphosphate, and phosphorus pentoxide;

active components comprising Mo, Te, and graphite; and

a solvent.

2. The coating precursor slurry of claim 1, wherein Mo is present in the slurry as molybdenum powder, a molybdenum telluride compound, a molybdenum oxide, or a mixture thereof;

and wherein Te is present in the slurry as tellurium powder, a molybdenum telluride compound, a tellurium oxide, or a mixture thereof.

3. The coating precursor slurry of claim 1, wherein the coating precursor slurry comprises, by weight, about 4% to about 10% of the aluminum-nitrogen compound, and wherein the aluminum-nitrogen compound comprises aluminum nitride.

4. The coating precursor slurry of claim 1, wherein the coating precursor slurry comprises, by weight, about 0.5% to about 4% of the barium-containing organic compound.

5. The coating precursor slurry of claim 1, wherein the barium-containing organic compound comprises barium acetate.

6. The coating precursor slurry of claim 1, wherein the coating precursor slurry comprises, by weight, about 0.5% to about 4% of the nickel-containing organic compound.

7. The coating precursor slurry of claim 1, wherein the nickel-containing organic compound comprises nickel acetate tetrahydride.

8. The coating precursor slurry of claim 1, wherein the coating precursor slurry comprises, by weight, about 5% to about 15% of ammonia polyphosphate.

9. The coating precursor slurry of claim 1, wherein the coating precursor slurry comprises, by weight, about 5% to about 15% of phosphorus pentoxide.

10. The coating precursor slurry of claim 1, wherein the organic binder comprises hexamethylenetetramine and a linear chain epoxy polymer.

11. The coating precursor slurry of claim 10, wherein the coating precursor comprises, by weight, greater than 0% to about 2.5% of the hexamethylenetetramine and about 0.5% to about 5% of the linear chain epoxy polymer.

12. The coating precursor slurry of claim 1, wherein the coating precursor comprises, by weight, about 1% to about 6% graphite, and wherein graphite is present in the coating precursor slurry as particles having an average particle size of about 25 μ

m to about 75 μ

m.

13. The coating precursor slurry of claim 1, wherein the combination of molybdenum and tellurium is molybdenum ditelluride, and wherein the coating precursor includes, by weight, about 2% to about 15% molybdenum ditelluride.

14. The coating precursor slurry of claim 1, wherein the coating precursor includes, by weight, about 0.2% to about 3% molybdenum powder and about 2% to about 15% molybdenum ditelluride.

15. The coating precursor slurry of claim 13, wherein the molybdenum ditelluride, molybdenum powder, and/or tellurium powder are present in the coating precursor slurry as particles having an average particle size of about 0.1 μ

m to about 3 μ

m.

16. The coating precursor slurry of claim 1, wherein the solvent comprises ethanol and/or water.

17. The coating precursor slurry of claim 1, wherein the coating precursor slurry comprises, by weight, about 4% to about 8% of the aluminum-nitrogen compound, wherein the aluminum-nitrogen compound comprises aluminum nitride;

about 1% to about 3% of the barium-containing organic compound, wherein the barium-containing organic compound comprises barium acetate;

about 1% to about 3% of the nickel-containing organic compound, wherein the nickel-containing organic compound comprises nickel acetate tetrahydride;

about 8% to about 12% of the ammonia polyphosphate;

about 7% to about 11% of phosphorus pentoxide;

about 2% to about 5% graphite.

18. The coating precursor slurry of claim 17, wherein the organic binder comprises hexamethylenetetramine and a linear chain epoxy polymer an organic binder, and wherein the combination of molybdenum and tellurium is molybdenum ditelluride, and further wherein the coating precursor includes, by weight, about 8% to about 12% molybdenum ditelluride, and further wherein the coating precursor includes, by weight, about 0.2% to 3% molybdenum powder, and further wherein the coating precursor includes, by weight, about 0.5 to 6% tellurium powder, and further wherein the solvent comprises ethanol and water.

19. A method of applying a lubricant composition onto a component, the method comprising:

applying the coating precursor slurry of claim 1 onto a surface of the component;

heating the coating precursor slurry on the component to a drying temperature of about 220°

C. to about 260°

C. to remove any solvent to form a dried coating precursor; and

heating the dried coating precursor on the component to a curing temperature of about 525°

C. to about 600°

C. to cure the dried coating precursor.

20. A method of forming a coating precursor slurry, the method comprising:

mixing a first solution and a second solution to form a slurry, wherein the first solution comprises an aluminum-nitrogen compound and phosphorus pentoxide in a first solvent, and wherein the second solution comprises phosphorus pentoxide, a barium-containing organic compound, an aluminum-nitrogen compound, and a nickel-containing organic compound in a second solvent; and

adding an ammonia polyphosphate, an organic binder, graphite, and molybdenum ditelluride to the slurry.