Disclosed is a polymer blend composition and shaped article, and a process of blending and making shaped articles of polymer blends in which the biocompatibility of various polymers is improved by blending with them a polymer including a zwitterionic group. The zwitterionic group is usually an ammonium phosphate ester, preferably a choline, zwitterionic group and the polymer containing it may be produced by the free radical polymerization 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.
本发明公开了一种聚合物混合物组合物和成型物,以及一种混合和制造聚合物混合物成型物的工艺,其中通过与聚合物混合物混合一种包括双性离子基团的聚合物,从而提高各种聚合物的
生物相容性。双性离子基团通常是一种
磷酸铵酯,优选是一种
胆碱双性离子基团,含有它的聚合物可以通过自由基聚合
乙烯基不饱和单体生产。两种聚合物的混合可以通过干混合粒状聚合物或通过混合聚合物的液体分散或溶液并去除液体介质来实现。通过引入超过10%或超过30%含有双性离子基团的聚合物的量,聚合物的
纤维蛋白原吸收和/或血小板活化可以降低到低于基础聚合物的80%或甚至低于60%的值。