CATHETER MADE OF A THERMOPLASTIC MATERIAL HAVING IMPROVED SOFTNESS AND LOW FRICTION

    公开(公告)号:CA1118312A

    公开(公告)日:1982-02-16

    申请号:CA317892

    申请日:1978-12-13

    Abstract: CATHETER MADE OF A THERMOPLASTIC MATERIAL HAVING IMPROVED SOFTNESS AND LOW FRICTION INVENTORS: Lawrence F. Becker Henry M. Gajewski 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.

    THERMOPLASTIC ELASTOMERIC BLOCK COPOLYMER BALLOON-TYPE CATHETERS

    公开(公告)号:CA1155578A

    公开(公告)日:1983-10-18

    申请号:CA316346

    申请日:1978-11-16

    Abstract: IMPROVED BALLOON-TYPE CATHETER Inventors: Lawrence F. Becker John J. Donohue Dean G. Laurin Henry M. Gajewski A balloon-type catheter is disclosed having a catheter shank made of a block copolymer having thermoplastic rubber characteristics with a central block of ethylene-butylene copolymer and terminal blocks of polystyrene. The inflatable balloon member, and preferably the distal Y-member, of the catheter are made of an elastic composition which includes the same or a similar block copolymer, in the presence of polystyrene or equivalent material as a tackifying agent, polypropylene, and an oil-type plasticizer.

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