Block copolymer elastomer catheter balloons

Details Block copolymer elastomer catheter balloons Block copolymer elastomer catheter balloons

2002-02-22

2009-11-17

Miggins, Michael C (Department: 1794)

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

C428S036900, C428S035700, C428S220000, C428S036910, C604S264000

Reexamination Certificate

active

07618696

ABSTRACT:
Balloons for medical devices, particularly balloon angioplasty catheters, are made from particular block copolymer thermoplastic elastomers in which the block copolymer is made up of hard segments of a polyester or polyamide and soft segments of polyether; the polyester hard segments are polyesters of an aromatic dicarboxylic acid and a C2-C4diol; the polyamide hard segments are polyamides of C6or higher carboxylic acids and C6or higher organic diamines or of C6or higher aliphatic ω-amino-α-acids, and the polyether soft segments are polyethers of C2-C10, diols; the block copolymer has a low flexural modulus, namely less than 150,000 psi; the block copolymer has a hardness, Shore D scale, of greater than 60; and the percentage by weight of the block polymer attributable to the hard segments is between about 50% and about 95%. The polymers provide high strength, thin wall, compliant and semi-compliant balloons, which leads to a low profile catheter. The low profile catheters have very good initial crossing, good trackability, good recrossing after first inflation.

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