Method for modifying the backbone of polymeric resins
    43.
    发明授权
    Method for modifying the backbone of polymeric resins 失效
    改性聚合物树脂骨架的方法

    公开(公告)号:US5693722A

    公开(公告)日:1997-12-02

    申请号:US764377

    申请日:1996-12-13

    CPC分类号: C08G64/30 C08G63/64 C08G64/14

    摘要: A process is disclosed whereby a polymeric resin (containing ester and/or carbonate bonds) is readily converted into a resin having a modified molecular structure. Accordingly, a polycyclic carbonate (a monomer or oligomer) is transesterified with the polymer resin in the melt, preferably upon extrusion, optionally in the presence of a catalyst. Significantly, the cyclic carbonates are, by the inventive process, inserted into the structure of the polymer, effecting branching of the molecular structure, a branching which manifests itself in the modified properties of the resin.

    摘要翻译: 公开了一种方法,其中聚合物树脂(含有酯和/或碳酸酯键)容易转化为具有改性分子结构的树脂。 因此,多烯碳酸酯(单体或低聚物)优选在挤出时,任选地在催化剂存在下,与聚合物树脂在熔体中酯交换。 重要的是,通过本发明的方法,环状碳酸酯被插入到聚合物的结构中,实现分子结构的支化,其表现为树脂的改性特性。