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6 条记录 (耗时 0.015 秒)

    Microcrystalline polyolefins and dispersions thereof
    4.
    发明授权
    Microcrystalline polyolefins and dispersions thereof 失效
    微晶聚合物及其分散体

    公开(公告)号：US3862069A

    公开(公告)日：1975-01-21

    申请号：US39773373

    申请日：1973-09-17

    申请人： FMC CORP

    发明人： CRUZ JR MAMERTO M ,  ERDI NICHOLAS Z ,  BATTISTA ORLANDO A

    IPC分类号： C08F8/50 ,  C08F45/52 ,  C08F3/10

    CPC分类号： C08J7/12 ,  C08J2323/12

    摘要： Chemically degraded, substantially atactic-free stereo-regular polyolefin resin exhibiting a sharp X-ray diffraction and distinctly modified thermal behavior compared to its precursor resin is disclosed herein. This material is readily mechanically attrited to obtain a product capable of forming a stable colloidal dispersion in a liquid medium having a minimal swelling action thereon. The chemically degraded polyolefin is prepared by a thermal catalytic oxidation treatment whereby the long chain polymers are considerably reduced in length by cleavage of the amorphous segments therein and the amorphous and atactic portions are removed by solvation.

    摘要翻译： 本文公开了与其前体树脂相比显示出尖锐X射线衍射和显着改变的热行为的化学降解的，基本上无立体的立体规则聚烯烃树脂。 该材料容易机械磨碎以获得能够在其上具有最小溶胀作用的液体介质中形成稳定的胶体分散体的产物。 通过热催化氧化处理制备化学降解的聚烯烃，由此长链聚合物的长度通过裂解其中的无定形链段而显着减少，并且通过溶剂化除去无定形部分和无规部分。