Multilayer medical balloon

Patent metadata

Field	Value
Publication number	US-9265918-B2
Application number	US-20347308-A
Country	US
Kind code	B2
Filing date	Sep 3, 2008
Priority date	Sep 3, 2008
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

An expandable medical balloon including an inner layer formed of a poly(ether-block-amide) copolymer and an outer layer formed of a polyamide, the expandable medical balloon having a burst strength of greater than 50,000 psi, and to methods of making and using the same.

First claim

The invention claimed is:

1. An expandable medical balloon comprising:
an inner layer formed of a poly(ether-block-amide) copolymer; and
an outer layer formed of a polyamide;
the expandable medical balloon having a diameter of about 3.3 mm and a burst strength of greater than 45,000 psi.

2. The expandable medical balloon of claim 1 wherein said burst strength is greater than 47,500 psi.

3. The expandable medical balloon of claim 1 wherein said burst strength is greater than 50,000 psi.

4. The expandable medical balloon of claim 1 wherein said polyamide is formed from laurolactam.

5. The expandable medical balloon of claim 1 wherein said inner layer has a Shore D hardness of about 25D to about 70D.

6. The expandable medical balloon of claim 1 wherein said outer layer has a Rockwell hardness of about 60 to about 115.

7. The expandable medical balloon of claim 1 further comprising a lubricious coating on at least a portion of the outer layer.

8. The expandable medical balloon of claim 1 wherein said wall thickness of said balloon is about 10 microns to about 30 microns.

9. The expandable medical balloon of claim 8 further comprising a lubricious coating on at least a portion of the outer layer, said lubricious coating having a thickness of about 0.1 microns to about 2 microns.

10. The expandable medical balloon of claim 9 , said lubricious coating having a thickness of about 0.5 to about 1 micron.

11. The expandable medical balloon of claim 1 wherein said inner layer provides at least about 10% of the burst strength of the resultant balloon.

12. The expandable medical balloon of claim 1 wherein said balloon comprises waist portions, cone portions and a body portion, said cone portions and said body portions comprise said inner and outer layer.

13. An expandable medical balloon comprising:
an inner layer formed of a polymer material having a Shore D hardness of about 25 to about 70; and
an outer layer formed of a polymer material having a Rockwell hardness of about 60 to about 115;

the expandable medical balloon having diameter of about 3.3 mm and a burst strength of greater than 45,000 psi.

14. The expandable medical balloon of claim 13 wherein the burst strength is greater than 47,500 psi.

15. The expandable medical balloon of claim 13 wherein the burst strength is greater than 50,000 psi.

16. The expandable medical balloon of claim 13 wherein said inner layer is formed of a polymer material having a Shore D hardness of about 50 to about 70.

17. The expandable medical balloon of claim 13 wherein said inner layer provides at least about 10% of the burst strength of the resultant balloon.

18. An expandable medical balloon comprising:
an inner layer formed of a poly(ether-block-amide) copolymer; and
an outer layer formed of a polyamide;

the inner layer is about 30% of the material area in cross-section and the outer layer is about 70% of the material area in cross-section of the balloon and the balloon having a burst strength of greater than 45,000 psi.

19. An expandable medical balloon comprising:
an inner layer formed of a poly(ether-block-amide) copolymer; and
an outer layer formed of a polyamide;

the expandable medical balloon having a burst strength of greater than 45,000 psi.

Assignees

• Chen John J
• Horn Daniel J
• Boston Scient Scimed Inc

Inventors

• Chen John J
• Horn Daniel J

Classifications

• A61L29/06 Primary

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• A61L29/14

  Materials characterised by their function or physical properties {, e.g. lubricating compositions} · CPC title

• A61M25/10

  Balloon catheters ({A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02;} inflatable balloons for placing stents or stent-grafts A61F2/958 {; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00}) · CPC title

• C08L77/00

  Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain (of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08); Compositions of derivatives of such polymers · CPC title

• A61M25/1011 Primary

  Multiple balloon catheters · CPC title