SILANE COATING COMPOSITIONS, COATING SYSTEMS, AND METHODS

• US 20070054127A1
• Filed: 08/24/2006
• Published: 03/08/2007
• Est. Priority Date: 08/26/2005
• Status: Abandoned Application

• Current Assignee: Surmodics Incorporated
• Original Assignee: Surmodics Incorporated
• Inventors: Hergenrother, Robert, Jelle, Bruce
• Application Number:
  US11/466,788
• Publication Number:
  US 20070054127A1
• Time in Patent Office: Days
• US Class Current: 428/411.100
• CPC Class Codes: A61L 27/18 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: B05D 1/38 with intermediate treatment intermediate treatment per se B05D3/00
• 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 3/067 Curing or cross-linking the coating
• CPC Class Codes: B05D 3/107 Post-treatment of applied coatings
• CPC Class Codes: B05D 7/54 No clear coat specified
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C09D 165/04 Polyxylylenes
• CPC Class Codes: C23C 26/00 Coating not provided for in groups C23C2/00 - C23C24/00
• CPC Class Codes: Y10T 428/31504 Composite [nonstructural laminate]
• CPC Class Codes: Y10T 428/31507 Of polycarbonate
• CPC Class Codes: Y10T 428/31551 Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane
• CPC Class Codes: Y10T 428/31931 Polyene monomer-containing
• CPC Class Codes: Y10T 428/31935 Ester, halide or nitrile of addition polymer

Abstract

The invention relates to coating systems having one or more hydrophobic layers bonded to a substrate with a silane composition and methods of making and using the same. In an embodiment, the invention includes an article having a substrate, a base coating layer covalently bonded to the surface of the substrate and a hydrophobic polymer layer disposed on the base coating layer. In an embodiment, the invention includes a method for forming an article including applying a base layer coating solution onto a substrate to form a base layer, applying a hydrophobic polymer layer onto the base layer, and applying actinic energy to the substrate.

Claims

1. An article comprising:

a substrate comprising a surface;

a base coating layer covalently bonded to the surface of the substrate, the base coating layer comprising a silane compound or a reaction product of a silane compound, the silane compound comprising at least one photoreactive group; and

a polymer layer disposed on the base coating layer, the polymer layer comprising a hydrophobic polymer.

2. The article of claim 1, the substrate comprising an inorganic substrate.

3. The article of claim 1, the substrate comprising a metal oxide.

4. The article of claim 1, the substrate comprising one or more of stainless steel, nitinol, and cobalt-chromium.

5. The article of claim 1, the substrate comprising silicon.

6. The article of claim 1, the hydrophobic polymer comprising at least one selected from the group of Parylenes, polyurethanes, silicones, polyacrylates, polycarbonates, and polybutadiene.

7. The article of claim 1, the hydrophobic polymer comprising at least one of poly 2-chloro-paraxylylene (Parylene C), polyparaxylylene (Parylene N), or poly 2,5-dichloro-paraxylylene (Parylene D).

8. The article of claim 1, the hydrophobic polymer having a solubility parameter of less than about 11.0 (cal/cm³)^1/2.

9. The article of claim 1, wherein the silane compound comprises a tri(C₁-C₃)alkoxysilyl group.

10. The article of claim 1, wherein the silane compound comprises (4-benzoylbenzoyl)aminopropyltrimethoxy silane.

11. The article of claim 1, wherein the photoreactive reactive group comprises a photoreactive benzophenone.

12. The article of claim 1, further comprising an active agent layer disposed on the polymer layer, the active agent layer comprising one or more polymers and an active agent.

13. The article of claim 12, wherein the active agent layer comprises poly(n-butyl methacrylate) (pBMA) and poly(ethylene-co-vinyl acetate) (pEVA).

14. The article of claim 1, the polymer layer covalently bonded to the base coating layer.

15. An article comprising:

a substrate comprising a surface;

a base coating layer covalently bonded to the surface of the substrate, the base coating layer comprising

a silane compound or a reaction product of a silane compound, and

a photoreactive cross-linking agent comprising at least two photoreactive groups or the residues of two photoreactive groups; and

a polymer layer disposed on the base coating layer, the polymer layer comprising a hydrophobic polymer.

16. A method of forming an article comprising:

applying a base layer coating solution onto a substrate to form a base layer, the base layer coating solution comprising a photoreactive silane compound;

applying a polymer layer onto the base layer, the polymer layer comprising a hydrophobic polymer; and

applying actinic energy to the substrate.

17. The method of claim 16, the substrate comprising silicon.

18. The method of claim 16, the substrate comprising one or more of stainless steel, nitinol, and cobalt-chromium.

19. The method of claim 16, the hydrophobic polymer comprising at least one of poly 2-chloro-paraxylylene (Parylene C), polyparaxylylene (Parylene N), or poly 2,5-dichloro-paraxylylene (Parylene D)

20. The method of claim 16, wherein the silane compound comprises a tri(C₁-C₃)alkoxysilyl group.

21. The method of claim 16, further comprising applying an active agent layer over the polymer layer, the active agent layer comprising one or more polymers and an active agent.