@ Disclosed are an antithrombogenic synthetic elastomer having repeat structural units represented by the following structural formula comprising portion I which is a soft segment unit containing a polyether and portion II which is a hard segment unit:
wherein R is a straight-chain or branched-chain alkylene group containing from 2 to 4 carbon atoms, R' is an amide group, an urethane group, an urea group or the like, n is an integer of 0 to 180, m is an integer of 1 to 20, is an integer of 1 to 10, said polymer having a microdomain structure composed of the soft and hard segments, the domains of which have an average size of 10 to 20 nm, and a molecular weight of said polymer being in the range of about 80 000 to about 500 000, and a process of the preparation thereof.
The antithrombogenic synthetic polymer of the present invention shows little adhesion of blood platelets thereto, little deformation of adhering blood platelets and an excellent antithrombogenic property. In addition, this polymer has excellent mechanical properties as an elastomer, because of having the portions I and II of the structural formula. This polymer is therefore highly useful for artificial organs such as artificial blood vessels, artificial kidneys, artificial hearts and the like, and for functional biomaterials and devices such as absorbents for biological components, carriers for sustained release preparations, adhesive materials for living tissue, injectors, blood bags, catheters and the like.
本发明公开了一种抗血栓合成弹性体,它具有由以下结构式表示的
重复结构单元,其中第 I 部分是含有聚醚的软段单元,第 II 部分是硬段单元:
其中 R 是含有 2 至 4 个
碳原子的直链或支链亚烷基,R'是
酰胺基、聚
氨酯基、
脲基或类似基团,n 是 0 至 180 的整数,m 是 1 至 20 的整数,是 1 至 10 的整数、所述
聚合物具有由软段和硬段组成的微域结构,其域的平均尺寸为 10 至 20 纳米,所述
聚合物的分子量在约 80 000 至约 500 000 之间,以及其制备方法。
本发明的抗血栓合成
聚合物的血小板粘附性小,粘附的血小板变形小,抗血栓性能优异。此外,这种
聚合物由于具有结构式中的 I 部分和 II 部分,因此作为弹性体具有优异的机械性能。因此,这种
聚合物非常适用于人造器官,如人造血管、人造肾脏、人造心脏等,以及功能性
生物材料和装置,如
生物成分吸收剂、缓释制剂载体、活组织粘合材料、注射器、血袋、导管等。