Catheter made of a thermoplastic material having improved softne

Details Catheter made of a thermoplastic material having improved softne Catheter made of a thermoplastic material having improved softne

1978-04-28

1980-04-22

Michell, Robert W.

Surgery

Truss

Pad

525 95, A61M 2500, C08L 4304

Patent

active

041989830

ABSTRACT:
A catheter, preferably a balloon-type catheter, is disclosed in which the catheter shaft is made of a thermoplastic material and thus may be extrudable, the shaft consisting essentially of (a) from 40 to 70 percent by weight of an elastic composition which comprises: from 50 to 99.5 percent by weight of a block copolymer having thermoplastic rubber characteristics with a central, rubbery polyolefin block and terminal blocks of polystyrene, and optionally including up to about 45 percent by weight of polypropylene, plus from 0.5 to 10 percent by weight of a cross-linked organic silicone elastomer; and (b) from 30 to 60 percent by weight of a hydrophobic oil-type plasticizer to provide the desired degree of softness to said elastic composition.

REFERENCES:
patent: 3691257 (1972-09-01), Kendrick et al.
patent: 3932555 (1976-01-01), Goodrich et al.
patent: 4154244 (1979-05-01), Becker et al.
"Fatty Acids" Encyclopedia of Chem. Tech., Kirk & Othmer, Ed. 2, Wiley, 1965, pp. 842 & 845.

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