Composite polyester material having a lubricous surface

Details Composite polyester material having a lubricous surface Composite polyester material having a lubricous surface

C - Chemistry, Metallurgy

08

K

C08K 3/00 (2006.01) A61L 29/00 (2006.01) A61L 29/12 (2006.01) A61L 29/14 (2006.01) A61M 25/00 (2006.01) C08L 67/00 (2006.01) A61M 29/02 (2006.01)

Patent

CA 2195948

A low friction intravascular catheter component formed of a polyester matrix having incorporated therein a finely divided lubricous particulate which is preferably one or more suitable lubricous particulate selected from the group consisting of graphite, molybdenum disulfide, TiC, MoC, graphite difluoride, and fluoropolymers. The polyester is preferably a copolymer with a predominant amount of polybutylene terephthalate and lesser amounts of components such as polytetramethylene ether glycol which has been esterified with dimethyl terephthalate, e.g. HYTREL. Typical components made of this low-friction material include the inner or outer tubular members of fixed-wire and over-the- wire dilatation catheters. A polysiloxane fluid may be incorporated within the matrix along with the lubricous particulate matter.

Un élément de cathéter intravasculaire à faible friction est constitué d'une matrice de polyester dans laquelle est incorporé un granulé fin et glissant comprenant de préférence une ou plusieurs particules glissantes appropriées choisies dans le groupe consistant en graphite, disulfure de molybdène, TiC, MoC, difluorure de graphite et des fluoropolymères. Ce polyester est de préférence un copolymère contenant une quantité prédominante de térephtalate de polybutylène et de moindres quantités de composants telles que du polytétraméthylène éther glycol qui a été estérifié avec un téréphtalate de diméthyle, de l'HYTREL? par exemple. Avec ce matériau à faible friction on fabrique généralement des éléments tubulaires internes ou externes de cathéters de dilatation à fil fixe ou entourant le fil. En plus de ce granulé glissant, ou peut incorporer dans cette matrice un fluide à base de polysiloxane.

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