Silicone rubber catheter having improved surface morphology

• US 4,838,876 A
• Filed: 02/11/1988
• Issued: 06/13/1989
• Est. Priority Date: 04/29/1986
• Status: Expired due to Term

• Current Assignee: The Kendall Company (Colgate-Palmolive Company)
• Original Assignee: The Kendall Company (Colgate-Palmolive Company)
• Inventors: Ballan, Daniel G., Wong, Edward W.
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): Colosimo, Mark F.
• Application Number:
  US07/157,171
• Time in Patent Office: 488 Days
• Field of Search: 604/265, 604/266, 604/280, 128/DIG. 21
• US Class Current: 604/265
• CPC Class Codes: A61L 29/085 Macromolecular materials
• CPC Class Codes: A61L 29/14 Materials characterised by their function or physical properties , e.g. lubricating compositions
• CPC Class Codes: C08L 83/04 Polysiloxanes

Abstract

Silicone rubber catheters possessing improved surface morphology, at least the surface of the catheter to be inserted in the body having bonded thereto the reaction product of a composition comprising:

(1) at least one crosslinkable polysiloxane;

(2) an innocuous lubricating agent; and

(3) a crosslinking agent

Preferably, the lubricating agent is a medical grade lubricating oil.

Claims

1. A silicone rubber catheter having improved surface morphology, said catheter having a portion thereof adapted for insertion in the body, at least the said portion of said catheter having chemically bonded through crosslinking to the surface thereof a smooth continuous outer layer comprising a crosslinked polysiloxane, said outer layer further including an innocuous lubricating agent.

2. A catheter as defined in claim 1 wherein said lubricating agent is an oil.

3. A catheter as defined in claim 2 wherein said oil is a medical grade silicone oil.

4. A catheter as defined in claim 1 wherein said chemically bonded outer layer is provided by effectively crosslinking a composition comprising a crosslinkable polysiloxane, and innocuous medical grade lubricating oil and a crosslinking catalyst.

5. A catheter as defined in claim 4 where in said polysiloxane comprises dimethyl polysiloxane.

6. A catheter as defined in claim 4 wherein said lubricating oil is a silicone oil.

7. A catheter as defined in claim 1, wherein said catheter is a Foley catheter.

8. A Foley silicone rubber urethal catheter having improved surface morphology, said Foley catheter having a portion thereof adapted for insertion into the urethal, at least the said portion of said Foley catheter having been chemically bonded through crosslinking to the surface thereof to constitute a smooth continuous lubricious outer layer comprising a crosslinkable poly siloxane.

9. A process of improving the surface morphology of a silicone rubber catheter having a portion thereof adapted for insertion in the body, comprising the steps of applying to the surface of at least the said portion a composition comprising a crosslinkable polysiloxane, a lubricating agent and a crosslinking agent in a liquid vehicle;

and thereafter heating said portion at a temperature and for a time sufficient to remove said liquid vehicle and to chemically bond through crosslinking to the surface of said portion the crosslinkable polysiloxane, thereby providing an improved catheter surface which is a smooth, continuous outer layer.

10. A process as defined i claim 9 wherein said liquid vehicle is a volatile organic solvent for said composition.

11. A process as defined in claim 10 wherein said lubricating agent is an oil.

12. A process as defined in claim 11 wherein said oil is a medical grade silicone oil.

13. A process as defined in claim 12 wherein said catheter is indwelling.

14. A process as defined in claim 12 wherein said catheter is a urethral catheter.

15. A process as defined in claim 12 wherein said catheter is a Foley Catheter.