An antithrombogenic material is composed of a fluorine-containing block polymer obtained by the polyaddition or polycondensation of a prepolymer with a chain extender, said prepolymer being a diisocyanate prepolymer represented by the formula
where Rf is a perfluoroalkylene or perfluoroxyalkylene group having from 1 to 20 carbon atoms and containing from 0 to 10 ether linkages, A is a divalent organic group containing an oxygen atom in its main chain and m is from 1 to 3, or a dicarbamate prepolymer obtained by reacting the diisocyanate prepolymer with a lower alcohol.
一种抗血栓形成材料由含
氟嵌段聚合物组成,该嵌段聚合物通过预聚物与扩链剂的加成或缩聚反应获得,所述预聚物为二
异氰酸酯预聚物,其分子式为 Rf 为具有 1 至 20 个碳原子且含有 0 至 10 个醚键的
全氟烷基或全
氟氧烷基,A 为主链中含有一个氧原子的二价有机基团,m 为 1 至 3,或者是通过二
异氰酸酯预聚物与低级醇反应获得的二
氨基甲酸酯预聚物。