HYDROPHOBIC AND OLEOPHOBIC COATING AND METHOD FOR PREPARING THE SAME

• US 20080240479A1
• Filed: 10/03/2007
• Published: 10/02/2008
• Est. Priority Date: 10/03/2006
• Status: Abandoned Application

• Current Assignee: Sonic Innovations Incorporated (William Demant Fonden)
• Original Assignee: Sonic Innovations Incorporated (William Demant Fonden)
• Inventors: Linford, Matthew R., Saini, Gaurav
• Application Number:
  US11/866,897
• Publication Number:
  US 20080240479A1
• Time in Patent Office: Days
• US Class Current: 381/323
• CPC Class Codes: B05D 1/185 applying monomolecular layers B05D1/204 takes precedence
• CPC Class Codes: B05D 1/60 Deposition of organic layers from vapour phase vapour phase deposition in general C23C14/00, C23C16/00
• CPC Class Codes: B05D 3/062 Pretreatment
• CPC Class Codes: B05D 3/10 by other chemical means
• CPC Class Codes: B05D 3/142 Pretreatment
• CPC Class Codes: B05D 7/52 Two layers
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: B82Y 40/00 Manufacture or treatment of nanostructures
• 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: Y10T 428/31663 As siloxane, silicone or silane

Abstract

A hydrophobic and oleophobic coating, comprising an adhesion promoting layer formed from an adhesion promoting composition and a hydrophobic layer formed from a hydrophobic layer forming composition, is disclosed. The adhesion promoting composition may comprise an adhesion promoting compound having a functional linking group and at least one of a silane functional group and/or a germanium functional group. The hydrophobic layer forming composition may comprise a hydrophobic layer forming compound having a hydrophobic aliphatic group and at least one of a silane functional group and/or a germanium functional group. A method of forming the coating is also disclosed.

Claims

1. A method, comprising:

(a) depositing a first silane onto a surface, the first silane comprising a functional linking group and a silane group;

(b) depositing a second silane onto the first silane, the second silane comprising a hydrophobic aliphatic group and a silane group.

2. The method of claim 1, wherein the functional linking group of the first silane comprises at least one of:

an isocyanate group;

an acyl halide group;

an epoxide group;

a glycidyl group;

an amino group;

a methyl ester group;

an isothiocyanato group;

a carboxyl group;

an activated carboxyl group;

an alkyl halide group;

a benzyl halide group;

a chlorosilane group;

a methoxysilane group;

an ethoxysilane group.

3. The method of claim 1, wherein the silane group of the first silane comprises a group represented by:

4. The method of claim 1, wherein the first silane comprises a structure represented by:

5. The method of claim 1, wherein the hydrophobic aliphatic group of the second silane comprises at least one of:

an alkyl chain;

a partially fluorinated alkyl chain;

a perfluorinated alkyl chain.

6. The method of claim 1, wherein the silane group of the second silane comprises a group represented by:

7. The method of claim 1, wherein the second silane comprises a structure represented by:

8. The method of claim 1, wherein the surface comprises a surface of a polymeric substrate.

9. The method of claim 1, wherein the surface comprises a surface of a silicon based substrate.

10. The method of claim 1, wherein the surface comprises a hydroxyl group.

11. The method of claim 10, wherein (a) comprises bonding the first silane to the surface by reacting the first silane with the hydroxyl group of the surface.

12. The method of claim 1, wherein the surface comprises a surface of a silicon based substrate comprising a silanol group.

13. The method of claim 12, wherein (a) comprises bonding the first silane to the surface by reacting a silane group of the first silane with the silanol group of the silicon based substrate to form a siloxane linkage.

14. The method of claim 1, further comprising, prior to (a):

(c) oxidizing a portion of the surface.

15. The method of claim 14, wherein (c) comprises exposing the surface to at least one of:

a plasma;

an oxidizing agent;

ultraviolet light.

16. The method of claim 1, further comprising, prior to (b):

(d) hydrolyzing the first silane.

17. The method of claim 16, wherein (d) comprises hydrolyzing the silane group on the first silane to form a silanol group.

18. The method of claim 17, wherein (b) comprises bonding the second silane to the first silane by reacting the silane group of the second silane with the silanol group of the first silane to form a siloxane linkage.

19. The method of claim 16, wherein (d) comprises exposing the first silane to moisture.

20. The method of claim 1, further comprising, prior to (a):

(e) vaporizing the first silane to form a vaporized first silane.

21. The method of claim 20, wherein (a) comprises exposing the substrate to the vaporized first silane.

22. The method of claim 1, further comprising, prior to (b):

(f) vaporizing the second silane to form a vaporized second silane.

23. The method of claim 22, wherein (b) comprises exposing the first silane to the vaporized second silane.

24. The method of claim 1, further comprising:

(g) cross-linking at least one of;

the first silane;

the second silane.

25. The method of claim 1, further comprising:

(h) curing at least one of;

the first silane;

the second silane.

26. A composition of matter, comprising the reaction product of:

a substrate comprising a hydroxyl group;

a first silane comprising a functional linking group and a silane group;

a second silane comprising a hydrophobic aliphatic group and a silane group.

27. The composition of matter of claim 26, wherein the functional linking group comprises at least one of:

an isocyanate group;

an acyl halide group;

an epoxide group;

a glycidyl group;

an amino group;

a methyl ester group;

an isothiocyanato group;

a carboxyl group;

an activated carboxyl group;

an alkyl halide group;

a benzyl halide group;

a chlorosilane group;

a methoxysilane group;

an ethoxysilane group.

28. The composition of matter of claim 26, wherein the first silane is bonded to the substrate by at least one of:

a carbamate linkage;

an ester linkage;

an ether linkage;

a Si—

O—

C linkage;

an amide linkage;

an imine linkage;

an ionic linkage;

a siloxane linkage.

29. The composition of matter of claim 26, wherein the silane group of the first silane comprises a group represented by:

30. The composition of matter of claim 26, wherein the first silane comprises a structure represented by:

31. The composition of matter of claim 26, wherein the hydrophobic aliphatic group of the second silane comprises at least one of:

an alkyl chain;

a partially fluorinated alkyl chain;

a perfluorinated alkyl chain

32. The composition of matter of claim 26, wherein the silane group of the second silane comprises a group represented by:

33. The composition of matter of claim 26, wherein the second silane comprises a structure represented by:

34. The composition of matter of claim 26, wherein the substrate comprises a polymeric substrate.

35. The composition of matter of claim 26, wherein the substrate comprises a silicon based substrate.

36. The composition of matter of claim 26, wherein the first silane comprises cross-linked portions comprising siloxane linkages.

37. The composition of matter of claim 26, wherein the second silane comprises cross-linked portions comprising siloxane linkages.

38. An article, comprising:

a first portion having a surface;

a coating composition bonded to the surface of the first portion, the coating composition comprising;

a first silane bonded to the surface of the first portion, the first silane comprising a silane group;

a second silane bonded to the first silane by a siloxane linkage, the second silane comprising a hydrophobic aliphatic group.

40. The article of claim 38, wherein the first silane comprises a silane group represented by:

41. The article of claim 38, wherein the first silane comprises a structure represented by:

42. The article of claim 38, wherein the hydrophobic aliphatic group of the second silane comprises at least one of:

an alkyl chain;

a partially fluorinated alkyl chain;

a perfluorinated alkyl chain.

43. The article of claim 38, wherein the second silane comprises a silane group represented by:

44. The article of claim 38, wherein the second silane comprises a structure represented by:

45. The article of claim 38, further comprising an opening defined in the surface of the first portion.

46. The article of claim 45, wherein the coating composition is bonded to the surface of the first portion at a region adjacent to the opening defined in the surface of the first portion.

47. The article of claim 45, wherein the opening has an opening surface defining a portion of the opening extending through a portion of the article, and wherein the coating composition is bonded to the opening surface.

48. The article of claim 45, wherein the coating composition is capable of preventing a liquid from passing through the opening.

49. The article of claim 38, wherein the surface of the first portion comprises a mesh surface, the mesh surface comprising openings defined in the mesh surface.

50. The article of claim 38, further comprising a second portion having a surface, wherein an opening is defined between the surface of the first portion and the surface of the second portion.

39. The article of 38, wherein the first silane is bonded to the surface of the first portion by at least one of:

a carbamate linkage;

an ester linkage;

an ether linkage;

a Si—

O—

C linkage;

an amide linkage;

an imine linkage;

an ionic linkage;

a siloxane linkage.

51. An apparatus, comprising:

a hearing aid device, the hearing aid device comprising;

a first component, the first component having a surface portion;

a coating composition bonded to the surface portion of the first component, the coating composition comprising;

an adhesion layer bonded to the surface portion of the first component;

a hydrophobic layer bonded to the adhesion layer.

52. The apparatus of claim 51, wherein the hydrophobic layer comprises a hydrophobic aliphatic group comprising at least one of:

an alkyl chain;

a partially fluorinated alkyl chain;

a perfluorinated alkyl chain.

53. The apparatus of claim 51, wherein the adhesion layer is bonded to the surface portion of the first component by at least one of:

a carbamate linkage;

an ester linkage;

an ether linkage;

a Si—

O—

C linkage;

an amide linkage;

an imine linkage;

an ionic linkage;

a siloxane linkage.

54. The apparatus of claim 51, wherein the hydrophobic layer is bonded to the adhesion layer by at least one of:

a siloxane linkage;

a Si—

O—

Ge linkage;

a Ge—

O—

Ge linkage.

55. The apparatus of claim 51, wherein portions of the coating composition are cross-linked.

56. The apparatus of claim 51, wherein the first component comprises an opening defined in the surface portion of the first component.

57. The apparatus of claim 56, wherein the coating composition is bonded to the surface portion of the first component at a region adjacent to the opening defined in the surface portion of the first component.

58. The article of claim 56, wherein the opening has an opening surface defining a portion of the opening extending through a portion of the first component, and wherein the coating composition is bonded to the opening surface.

59. The apparatus of claim 51, further comprising a second component having a surface portion.

60. The apparatus of claim 59, further comprising a coating composition bonded to the surface portion of the second component, the coating composition comprising:

an adhesion layer bonded to the surface portion of the second component;

a hydrophobic layer bonded to the adhesion layer.

61. The apparatus of claim 59, wherein the surface portion of the first component is positioned adjacent to the surface portion of the second component;

and

wherein an opening is defined between the surface portion of the first component and the surface portion of the second component.

62. The apparatus of claim 61, wherein the coating composition is bonded to the surface of the first portion in a quantity sufficient to prevent a liquid from passing through the opening.

63. The apparatus of claim 62, wherein the coating composition is bonded to the surface of the first portion in a quantity sufficient to permit a gas to pass through the opening.

64. The apparatus of claim 51, wherein the hearing aid device comprises at least one of:

a shell component;

a volume controller;

a battery door;

a microphone cover.

65. The apparatus of claim 51, wherein the hearing aid device comprises a hearing aid accessory, the hearing aid accessory comprising at least one of:

a battery;

a battery contact.

66. A method, comprising:

(a) depositing a first silane onto a surface portion of a hearing aid device, the first silane comprising a functional linking group and a silane group;

(b) depositing a second silane onto the first silane, the second silane comprising a hydrophobic aliphatic group and a silane group.

67. The method of claim 66, wherein the functional linking group of the first silane comprises at least one of:

an isocyanate group;

an acyl halide group;

an epoxide group;

a glycidyl group;

an amino group;

a methyl ester group;

an isothiocyanato group;

a carboxyl group;

an activated carboxyl group;

an alkyl halide group;

a benzyl halide group;

a chlorosilane group;

a methoxysilane group;

an ethoxysilane group.

68. The method of claim 66, wherein the silane group of the first silane comprises a group represented by:

69. The method of claim 66, wherein the first silane comprises a structure represented by:

70. The method of claim 66, wherein the hydrophobic aliphatic group of the second silane comprises at least one of:

an alkyl chain;

a partially fluorinated alkyl chain;

a perfluorinated alkyl chain.

71. The method of claim 66, wherein the silane group of the second silane comprises a group represented by:

72. The method of claim 66, wherein the second silane comprises a structure represented by:

73. The method of claim 66, further comprising, prior to (a):

(c) oxidizing a portion of the surface.

74. The method of claim 66, wherein the hearing aid device comprises at least one of:

a shell component;

a volume controller;

a battery door;

a microphone cover.

75. The method of claim 66, wherein the hearing aid device comprises a hearing aid accessory, the hearing aid accessory comprising at least one of:

a battery;

a battery contact.

76. A method, comprising:

(a) depositing an adhesion promoting compound onto a surface, the adhesion promoting compound comprising a functional linking group and at least one of;

a silane functional group;

a germanium functional group;

(b) depositing a hydrophobic layer forming compound onto the adhesion promoting compound, the hydrophobic layer forming compound comprising a hydrophobic aliphatic group and at least one of;

a silane functional group;

a germanium functional group.

77. The method of claim 76, wherein the functional linking group of the adhesion promoting compound comprises at least one of:

an isocyanate group;

an acyl halide group;

an epoxide group;

a glycidyl group;

an amino group;

a methyl ester group;

an isothiocyanato group;

a carboxyl group;

an activated carboxyl group;

an alkyl halide group;

a benzyl halide group;

a chlorosilane group;

a methoxysilane group;

an ethoxysilane group.

78. The method of claim 76, wherein the surface comprises a hydroxyl group.

79. The method of claim 78, wherein (a) comprises bonding the adhesion promoting compound to the surface by reacting the functional linking group of the adhesion promoting compound with the hydroxyl group of the surface.

80. The method of claim 76, further comprising, prior to (a):

(c) oxidizing a portion of the surface.

81. The method of claim 76, further comprising, prior to (b):

(d) hydrolyzing the adhesion promoting compound.

82. The method of claim 76, further comprising, prior to (a):

(e) vaporizing the adhesion promoting compound to form a vaporized adhesion promoting compound.

83. The method of claim 76, further comprising, prior to (b):

(f) vaporizing the hydrophobic layer forming compound to form a vaporized hydrophobic layer forming compound.

84. The method of claim 76, further comprising:

(g) cross-linking at least one of;

the adhesion promoting compound;

the hydrophobic layer forming compound.

85. A composition of matter, comprising the reaction product of;

a substrate comprising a hydroxyl group;

an adhesion promoting composition comprising an adhesion promoting compound, the adhesion promoting compound comprising a functional linking group and at least one of;

a silane functional group;

a germanium functional group;

a hydrophobic layer forming composition comprising a hydrophobic layer forming compound, the hydrophobic layer forming compound comprising a hydrophobic aliphatic group and at least one of;

a silane functional group;

a germanium functional group.

86. The composition of matter of claim 85, wherein at least one of the adhesion promoting composition and the hydrophobic layer forming composition comprises a compound having a silane functional group;

and

wherein at least one of the adhesion promoting composition and the hydrophobic layer forming composition comprises a compound having a germanium functional group.

87. The composition of matter of claim 85, wherein the functional linking group of the adhesion promoting compound comprises at least one of:

an isocyanate group;

an acyl halide group;

an epoxide group;

a glycidyl group;

an amino group;

a methyl ester group;

an isothiocyanato group;

a carboxyl group;

an activated carboxyl group;

an alkyl halide group;

a benzyl halide group;

a chlorosilane group;

a methoxysilane group;

an ethoxysilane group.

88. The composition of matter of claim 85, wherein the adhesion promoting compound is bonded to the substrate by at least one of:

a carbamate linkage;

an ester linkage;

an ether linkage;

a Si—

O—

C linkage;

an amide linkage;

an imine linkage;

an ionic linkage;

a siloxane linkage.

89. The composition of matter of claim 85, wherein the adhesion promoting compound comprises a group represented by:

90. The composition of matter of claim 85, wherein the adhesion promoting compound comprises a structure represented by:

91. The composition of matter of claim 85, wherein the hydrophobic aliphatic group of the hydrophobic layer forming compound comprises at least one of:

an alkyl chain;

a partially fluorinated alkyl chain;

a perfluorinated alkyl chain

92. The composition of matter of claim 85, wherein the hydrophobic layer forming compound comprises a group represented by:

93. The composition of matter of claim 85, wherein the hydrophobic layer forming compound comprises a structure represented by:

94. The composition of matter of claim 85, wherein the adhesion promoting compound comprises a group represented by:

95. The composition of matter of claim 85, wherein the adhesion promoting compound comprises a structure represented by:

96. The composition of matter of claim 85, wherein the hydrophobic layer forming compound comprises a group represented by:

97. The composition of matter of claim 85, wherein the hydrophobic layer forming compound comprises a structure represented by:

98. The composition of matter of claim 85, wherein the substrate comprises a polymeric substrate.

99. The composition of matter of claim 85, wherein the substrate comprises a silicon based substrate.