Medical devices having durable and lubricious polymeric coating

• US 20050226993A1
• Filed: 06/06/2005
• Published: 10/13/2005
• Est. Priority Date: 10/03/2000
• Status: Abandoned Application

• Current Assignee: Dennis D. Jamiolkowski, Jesse G. Nawrocki
• Original Assignee: Dennis D. Jamiolkowski, Jesse G. Nawrocki
• Inventors: Nawrocki, Jesse G., Jamiolkowski, Dennis D.
• Application Number:
  US11/145,795
• Publication Number:
  US 20050226993A1
• Time in Patent Office: Days
• US Class Current: 427/2.100
• CPC Class Codes: A61L 2420/02 Methods for coating medical devices
• CPC Class Codes: A61L 31/10 Macromolecular materials
• CPC Class Codes: C08L 83/04 Polysiloxanes

Abstract

A medical device having a contact surface exposed repeatedly to bodily tissue is disclosed. The contact surface is coated with a silicone polymer and one or more non-silicone hydrophobic polymers. The preferred medical device is a surgical needle, and the preferred coating is a polydimethylsiloxane and polypropylene wax hydrocarbon mixture. The incorporation of the non-silicone hydrophobic polymer increases the durability of the coating on the device without sacrificing lubricity.

Claims

1-17. -17. (canceled)

18. A process for coating a contact surface of a medical device exposed repeatedly to bodily tissue, the process comprising the steps of a) mixing a silicone polymer and a non-silicone hydrophobic polymer with a solvent to form a coating mixture, b) applying the coating mixture to the contact surface, and c) removing the solvent from the coating mixture.

19. The process for coating as set forth in claim 18, wherein the silicone polymer is soluble in the solvent.

20. The process for coating as set forth in claim 19 wherein the silicone polymer is a polyalkylsiloxane.

21. The process for coating as set forth in claim 20 wherein the polyalkylsiloxane is a polydimethylsiloxane.

22. The process for coating as set forth in claim 21 wherein the non-silicone hydrophobic polymer has a critical surface tension of less than about 50 mN/m.

23. The process for coating as set forth in claim 22 wherein the non-silicone hydrophobic polymer is a thermoplastic polymer.

24. The process for coating as set forth in claim 23 wherein the thermoplastic polymer is flowable at less than about 210 C.

25. The process for coating as set forth in claim 21 wherein the coating has about 44 to about 66 weight percent of the polydimethylsiloxane and about 34 to about 56 weight percent of the thermoplastic polymer.

26. The process for coating as set forth in claim 25 wherein the medical device is a surgical needle.

27. The process for coating as set forth in claim 26 wherein the polydimethylsiloxane is hydroxy terminated.

28. The process for coating as set forth in claim 27 wherein the thermoplastic polymer is polyethylene, polypropylene or polycaprolactone.