Polyether block amide catheter balloons

A - Human Necessities – 61 – L

Patent

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Details

A61L 29/00 (2006.01) A61L 29/06 (2006.01)

Patent

CA 2303159

An inflatable member such as a ballon which is formed at least in part of a polyamide/polyether block copolymer thermoplastic elastomer, commonly referred to as polyether block amide (PEBA). The presently preferred PEBA copolymer is polyamide/polyether polyester copolymer, such as PEBAX. The balloon of the invention exhibits high tensile strength, high elongation, and low flexural moduli. The balloon may be formed as a single layer of PEBA, or as a multilayer coextrudate having at least one PEBA layer. The balloon may be 100 % PEBA or a blend of PEBA with another polymer, such as nylon.

L'invention a pour objet un élément gonflable tel qu'un ballonnet qui se compose au moins en partie d'un élastomère thermoplastique de copolymère séquencé de polyamide/polyéther, généralement appelé copolymère séquencé d'amide et de polyéther (PEBA). Le copolymère préféré de PEBA est un copolymère de polyester de polyéther/polyamide, tel que du PEBAX?. Le ballonnet selon l'invention présente une résistance à la traction élevée, un allongement à la rupture important et un module de flexion faible. Le ballonnet peut être formé comme simple couche de PEBA, ou comme un coextrudat multicouches présentant au moins une couche de PEBA. Le ballonnet peut être réalisé à 100 % en PEBA ou un mélange de PEBA avec un autre polymère, comme du nylon.

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