Polysiloxane coatings for surfaces

• US 20030232201A1
• Filed: 06/05/2003
• Published: 12/18/2003
• Est. Priority Date: 06/07/2002
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Lally, Edward David, Byrd, Norman R., Keener, Steven G., Peralta, Cesare
• Granted Patent: US 6,809,169 B2
• Time in Patent Office: Days
• US Class Current: 428/447
• CPC Class Codes: C08G 18/61 Polysiloxanes
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
• CPC Class Codes: C09D 175/04 Polyurethanes
• CPC Class Codes: C09D 183/04 Polysiloxanes
• CPC Class Codes: C09D 183/14 in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms C09D183/10 takes precedence
• CPC Class Codes: C25D 11/24 Chemical after-treatment
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

The present invention is directed to a method for applying to a substrate having a faying surface, a polysiloxane-containing coating, preferably a polysiloxane(amide-ureide) coating capable of inhibiting corrosion as well as the accumulation of ice. One embodiment of the present invention is directed to a polysiloxane(amide-ureide) that forms a durable, long lasting, anti-corrosive and anti-ice coating when directed to a substrate faying surface.

Claims

1. A coating for use on a component surface, said coating comprising a polymer comprising Component A and Component B, wherein Component A is a compound comprising the formula:

2. The coating of claim 1, wherein the diisocyanate is selected from the group consisting of alkyl diisocyanate, wherein the alkyl portion is from C₁ to C₁₀;

non-linear aryl diisocyanate; and

non-linear heterocyclic diisocyanate.

3. The coating of claim 1, wherein at least a portion of the substituted dicarboxylic acid is selected from the group consisting of fumaryl halides, succinyl halides, phthalyl halides, terephthalyl halides, and maleiyl halides.

4. The coating of claim 1, wherein the component comprises an aircraft component.

5. The coating of claim 1, wherein the component surface comprises a faying surface.

6. A substrate comprising a surface coated with a coating, said coating comprising a polymer, said polymer comprising a Component A and a Component B, wherein Component A is a compound comprising the formula:

7. The substrate of claim 6, wherein the diisocyanate is selected from the group consisting of alkyl diisocyanate, wherein the alkyl portion is from C₁ to C₁₀;

non-linear aryl diisocyanate; and

non-linear heterocyclic diisocyanate.

8. The substrate of claim 6, wherein at least a portion of the substituted dicarboxylic acid is selected from the group consisting of fumaryl halides, succinyl halides, phthalyl halides, terephthalyl halides, and maleiyl halides.

9. The substrate of claim 6 wherein the polymer comprises a dicarboxylic component selected from fumaryl moieties, maleyl moieties, saturated C₄ to C₈ dicarboxylic moieties, and partially-saturated C₄ to C₈ dicarboxylic moieties.

10. The substrate of claim 6, wherein greater than approximately 50% of the dicarboxylic component of the polymer comprises fumaryl moieties.

11. The substrate of claim 6, wherein greater than approximately 80% of the dicarboxylic component of the polymer comprises fumaryl moieties.

12. The substrate of claim 6, wherein R₁ and R₂ are independently selected from the group consisting of methyl, ethyl, propyl, butyl, phenyl, and hydrogen moieties.

13. The substrate of claim 6, wherein at least one of R₁ and R₂ are selected from the group consisting of halogenated alkyls and halogenated aryls.

14. The substrate of claim 6, wherein A₁ and A₂ are independently selected from the group consisting of methyl, ethyl, propyl, butyl, and phenyl moieties.

15. The substrate of claim 6, wherein at least one of A₁, A₂, R₁, and R₂ are selected from the group consisting of halogenated alkyls, halogenated aryls, halogenated alkylaryls, halogentated cycloaliphatics, and halogenated heterocycles.

16. The substrate of claim 6, wherein the diisocyanate component comprises an aromatic diisocyante.

17. The substrate of claim 6, wherein the diisocyanate component comprises toluene-2,4-diisocyanate.

18. The substrate of claim 6, wherein the diisocyanate component comprises a saturated aliphatic diisocyanate.

19. The substrate of claim 6, wherein x is a number from 1 to about 1000.

20. The substrate of claim 6, wherein x is a number from about 20 to about 200.

21. The substrate of claim 6, wherein the substrate comprises an aircraft component.

22. The substrate of claim 6, wherein the surface comprises a faying surface.

23. The substrate of claim 6, wherein the coating inhibits the ability of ice to adhere to a surface of the aircraft component surface.

24. The substrate of claim 6, wherein the coating inhibits the ability of moisture to adhere to a surface of the aircraft component surface.

25. The substrate of claim 6, wherein the substrate further comprises a subsequent coating applied to the polymer coating.

26. The substrate of claim 6, wherein the substrate further comprises a pre-treatment applied to the substrate surface.

27. The substrate of claim 26, wherein the pre-treatment is selected from the group consisting of ZnNi pre-treatment, Cd flash pre-treatment and an anodizing pre-treatment process.

28. The substrate of claim 6, wherein the substrate further comprises a first coating applied to the substrate, with the polymer coating applied to the first coating as a secondary coating.

29. The substrate of claim 28, wherein the first coating comprises a curable organic coating material selected from the group consisting of phenolics, urethanes, epoxies, and melamines.

30. The substrate of claim 28, wherein the first coating comprises a curable organic coating material selected from the group consisting of polyurethanes, polyvinyl chlorides, silicones, epoxides, acrylates, polyimides, and phenolics.

31. The substrate of claim 6, wherein the substrate is made from a material selected from the group consisting of:

aluminum alloys, ferrous alloys, and non-metallic materials.

32. The substrate of claim 31, wherein the non-metallic material is selected from the group consisting of ceramic-, epoxy-, glass-, wood-, and carbon-containing materials.

33. The substrate of claim 6, wherein the substrate is made from a material selected from the group consisting of Monel 400, Monel K-500, A-286, Inconel 600, stainless steels 302, 303, 304, 304, 410, 416, 430, Custom 450, and 17-4PH.

34. The substrate of claim 6, wherein the substrate comprises an aluminum-alloy aircraft component.

35. The substrate of claim 28, wherein the substrate comprises an aluminum-alloy aircraft component.

36. An aircraft comprising the substrate of claim 6.

37. An aircraft comprising the substrate of claim 28.

38. A method for coating the surface of a component with a corrosion-inhibiting coating comprising the steps of:

providing a component having a surface;

providing a coating material, said coating material comprising a polymer comprising Component A and Component B, wherein Component A is a compound comprising the formula;

and wherein Component B comprises a compound comprising the formula;

or a compound comprises the formula;

wherein X is a prepolymer comprising the formula;

wherein R₁, R₃, and R₄ are independently selected from the group consisting of hydrogen;

C₁ to C₆ alkyls and aryls;

C₃ to C₆ cycloaliphatics; and

C₃ to C₆ heterocycles;

A₁ and A₂ are independently selected from the group consisting of C₁ to C₆ alkyls and aryls;

C₇ to C₁₂ alkylaryls;

C₃ to C₆ cycloaliphatics; and

C₃ to C₆ heterocycles;

R₂, R₅, and R₆ are independently selected from the group consisting of C₁ to C₁₀ alkyls;

aryls, and heterocycles;

m and x are each a number from 1 to about 10,000;

CYAN is a diisocyanate;

Z is a halide-substituted dicarboxylic acid; and

applying the polymer coating to the surface.

39. The method of claim 38, wherein the polymer comprises a dicarboxylic component selected from fumaryl moieties, maleyl moieties, saturated C₄ to C₈ dicarboxylic moieties, and partially-saturated C₄ to C₈ dicarboxylic moieties.

40. The method of claim 38, wherein greater than approximately 50% of the dicarboxylic component of the polymer comprises fumaryl moieties.

41. The method of claim 38 wherein greater than approximately 80% of the dicarboxylic component of the polymer comprises fumaryl moieties.

42. The method of claim 38, wherein R₁ and R₂ are independently selected from the group consisting of methyl, ethyl, propyl, butyl, phenyl, and hydrogen moieties.

43. The method of claim 38, wherein at least one of R₁ and R₂ are selected from the group consisting of halogenated alkyls and halogenated aryls.

44. The method of claim 38, wherein A₁ and A₂ are independently selected from the group consisting of methyl, ethyl, propyl, butyl, and phenyl moieties.

45. The method of claim 38, wherein at least one of A₁, A₂, R₁, and R₂ are selected from the group consisting of halogenated alkyls, halogenated aryls, halogenated alkylaryls, halogentated cycloaliphatics, and halogenated heterocycles.

46. The method of claim 38, wherein the diisocyanate component comprises an aromatic diisocyante.

47. The method of claim 38, wherein the diisocyanate component comprises toluene-2,4-diisocyanate.

48. The method of claim 38, wherein the diisocyanate component comprises a saturated aliphatic diisocyanate.

49. The method of claim 38, wherein x is a number from 1 to about 1000.

50. The method according to claim 38, wherein x is a number from about 20 to about 200.

51. The method of claim 38, further comprising the steps of providing a first coating between the component surface and the polymer coating.

52. The method of claim 51, wherein the first coating comprises a curable organic coating material selected from the group consisting of phenolics, urethanes, epoxies, and melamines.

53. The method of claim 51, wherein the first coating comprises a curable organic coating material selected from the group consisting of polyurethanes, polyvinyl chlorides, silicones, epoxides, acrylates, polyimides, and phenolics.

54. The method according to claim 38, wherein the component comprises an aircraft component.

55. The method of claim 38, wherein the component is made from a material selected from the group consisting of:

aluminum alloys, ferrous alloys, and non-metallic materials.

56. The method of claim 38, wherein the component is made from a material selected from the group consisting of Monel 400, Monel K-500, A-286, Inconel 600, stainless steels 302, 303, 304, 304, 410, 416, 430, Custom 450, and 17-4PH.

57. The method of claim 38, further comprising the step of applying a second coating to the polymer coating.

58. The method of claim 38, further comprising the step of applying a pre-treatment to the component surface.

59. The substrate of claim 38, wherein the pre-treatment is selected from the group consisting of a ZnNi pre-treatment and an anodizing pre-treatment.

60. The method of claim 38, wherein the surface comprises a faying surface.

61. An aircraft comprising components comprising surfaces coated according to the method of claim 38.

62. An aircraft comprising components comprising surfaces coated according to the method of claim 51.

63. The method of claim 38, wherein the coating inhibits the ability of ice to adhere to a component surface.

64. The method of claim 38, wherein the coating inhibits the ability of moisture to adhere to a component surface.

65. The method of claim 51, wherein the coating inhibits the ability of ice to adhere to a surface of the aircraft component surface.

66. The method of claim 51, wherein the coating inhibits the ability of moisture to adhere to a surface of the aircraft component surface.