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.

    24.
    发明专利
    未知

    公开(公告)号:NO792012L

    公开(公告)日:1979-12-20

    申请号:NO792012

    申请日:1979-06-18

    Abstract: A multiple-layered, autoclavable, flexible plastic sheet comprises (a) at least one first layer consisting essentially of 30 to 90 percent by weight of a block copolymer having thermoplastic rubbery characteristics and having rubbery olefin blocks and blocks of a polystyrene; and from 10 to 70 percent by weight of a polyolefin derived principally from at least one of propylene, ethylene and 4-methylpentene-1, said polyolefin having a Vicat Softening Temperature of about 120 DEG C.; and (b) at least one second layer consisting essentially of a polyolefin derived principally by from at least one of propylene, ethylene, and 4-methylpentene-1 and being of semi-crystalline characteristics to exhibit low permeability to water vapor, the first and second layers being bonded together in alternating arrangement.

    29.
    发明专利
    未知

    公开(公告)号:IT7922961V0

    公开(公告)日:1979-10-25

    申请号:IT2296179

    申请日:1979-10-25

    Abstract: A blood bag or other container which is made of a flexible, hemocompatible, sterilizable plastic material free of blood-extractable plasticizer. The blood bag contains an insert member which comprises a non-toxic, sterilizable plastic formulation which contains from 5 to 70 percent by weight of a blood-extractable plasticizer selected from the group consisting of the dioctylphthalates and dioctyladipates. Such a blood bag is capable of reducing the plasma hemoglobin in stored blood, when compared with similar blood bags without the insert member.

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