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    • 10. 发明申请
    • POLYMERIC BLENDS WITH ZWITTERIONIC GROUPS
    • 与ZWITTERICIC组合的聚合物混合物
    • WO1994014897A1
    • 1994-07-07
    • PCT/GB1993002652
    • 1993-12-23
    • BIOCOMPATIBLES LIMITEDJONES, Stephen, AlisterSTRATFORD, Peter, WilliamRIMMER, Steven
    • BIOCOMPATIBLES LIMITED
    • C08L101/02
    • C08L23/12A61L27/26A61L33/062C08L7/02C08L21/00C08L23/06C08L23/34C08L25/04C08L25/12C08L27/06C08L33/02C08L33/06C08L33/12C08L33/20C08L43/02C08L69/00C08L75/04C08L79/00C08L81/06C08L101/02Y10S524/916C08L2666/02C08L2666/04C08L2666/12C08L2666/08
    • The biocompatibility of various polymers are improved by blending with them a polymer including a zwitterionic groups. The zwitterionic group is usually an ammonium phosphate ester zwitterionic group and the polymer containing it may be produced by the free radical polymerisation of ethylenically unsaturated monomers including a monomer bearing the zwitterionic group. Blending of the two polymers may be achieved by dry blending particulate polymers or by mixing the polymers in liquid dispersion or solution followed by removal of the liquid medium. The fibrinogen absorption and/or platelet activation of polymers may be reduced to a value of less than 80 % or even less than 60 % of the base polymer by introducing amounts of more than 10 % or more than 30 % of the zwitterionic group containing polymer. Preferred blends are of copolymers of 2-(methacryloyloxyethyl)-2'-(trimethylammonium)ethyl phosphate inner salt with higher alkyl (meth) acrylate, blended with olefin polymers and/or with rubber latices. The products may be used in medical devices in which they come into contact with bodily fluids, especially blood, plasma, serum and/or tear film.
    • 通过与它们共混包含两性离子基团的聚合物来改善各种聚合物的生物相容性。 两性离子基团通常是磷酸铵两性离子基团,并且含有它的聚合物可以通过包含带有两性离子基团的单体的烯属不饱和单体的自由基聚合来制备。 两种聚合物的混合可以通过干燥混合颗粒聚合物或通过将聚合物混合在液体分散体或溶液中,然后除去液体介质来实现。 聚合物的纤维蛋白原吸收和/或血小板活化可以通过引入大于10%或大于30%的含两性离子基团的聚合物而减少到基础聚合物的小于80%或甚至小于60% 。 优选的共混物是2-(甲基丙烯酰氧基乙基)-2' - (三甲基铵)乙基磷酸内酯与高级烷基(甲基)丙烯酸酯的共聚物,与烯烃聚合物和/或与橡胶胶乳共混。 该产品可用于与体液尤其是血液,血浆,血清和/或泪液膜接触的医疗器械中。