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    • 7. 发明授权
    • Blends of polypropylenes
    • 聚丙烯的共混物
    • US5986009A
    • 1999-11-16
    • US198325
    • 1998-11-23
    • Johan A. ThoenPatricia AnsemsRudolf J. Koopmans
    • Johan A. ThoenPatricia AnsemsRudolf J. Koopmans
    • C08F297/08C08L23/10C08L23/12C08L23/14
    • C08L23/10C08L2205/02C08L2207/14C08L2308/00
    • The invention includes a blend composition comprising (a) about 1 to about 15 weight percent of amorphous polypropylene (b) about 99 to about 85 weight percent of crystalline polypropylene, wherein the molecular weight of the amorphous polypropylene is lower than the molecular weight of the crystalline polypropylene; the molecular weight (Mw) of the amorphous polypropylene is higher than about 50,000, preferably 100,000 g/mole; the amorphous polypropylene has a MWD less than about 3; and wherein the percentages are based on total amorphous plus crystalline polypropylene. Preferably, amorphous and crystalline polypropylenes are at least about 90 weight percent propylene units. Preferably, the amorphous polypropylene has a glass transition temperature greater than about -10.degree. C. The invention includes processes for preparing compositions of the invention, including a multistage process. Additionally the invention includes articles, sheets, films, foams and fibers comprising or prepared from compositions of the invention as well as processes for making the things, preferably processes involving stretching a composition of the invention. The processes include a process comprising, extrusion or injection blow molding; extruding, or thermoforming a composition of the invention; as well as a process comprising reacting a composition of the invention with a coupling agent.
    • 本发明包括共混组合物,其包含(a)约1至约15重量%的无定形聚丙烯(b)约99至约85重量%的结晶聚丙烯,其中无定形聚丙烯的分子量低于 结晶聚丙烯; 无定形聚丙烯的分子量(Mw)高于约50,000,优选为100,000g / mol; 无定形聚丙烯的MWD小于约3; 并且其中所述百分数是基于总无定形+结晶聚丙烯。 优选地,无定形和结晶聚丙烯为至少约90重量%的丙烯单元。 优选地,无定形聚丙烯具有大于约-10℃的玻璃化转变温度。本发明包括制备本发明组合物的方法,包括多级方法。 另外,本发明包括由本发明的组合物构成或制备的制品,片材,薄膜,泡沫和纤维,以及制备该物质的方法,优选涉及拉伸本发明组合物的方法。 该方法包括一种方法,包括挤塑或注射吹塑; 挤出或热成型本发明的组合物; 以及包括使本发明的组合物与偶联剂反应的方法。