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    • 1. 发明申请
    • BLENDS OF POLYPROPYLENES
    • 聚丙烯的混合物
    • WO9928381B1
    • 1999-07-15
    • PCT/US9825090
    • 1998-11-24
    • DOW CHEMICAL COTHOEN JOHAN AKOOPMANS RUDOLFANSEMS PATRICIA
    • THOEN JOHAN AKOOPMANS RUDOLFANSEMS PATRICIA
    • C08F297/08C08L23/10C08L23/14
    • C08L23/10C08L2205/02C08L2207/14C08L2308/00C08L2666/04
    • The invention includes a blend composition comprising (a) from 1 to 15 weight percent of amorphous polypropylene (b) from 99 to 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 50,OOO, preferably 100,OOO g/mole; the amorphous polypropylene has a MWD less than 3; and wherein the percentages are based on total amorphous plus crystalline polypropylene. Preferably, amorphous and crystalline polypropylenes are preferably at least 90 weight percent propylene units. Preferably, the amorphous polypropylene has a glass transition temperature greater than -10 DEG 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,该组合物包含(a)1-15重量%的无定形聚丙烯(b)99-85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的分子量 ; 无定形聚丙烯的分子量(Mw)高于50,000,优选100,000克/摩尔; 无定形聚丙烯的MWD小于3; 并且其中百分比基于总无定形加结晶聚丙烯。 优选地,无定形和结晶聚丙烯优选至少90重量%丙烯单元。 优选地,无定形聚丙烯具有大于-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,包括多阶段方法。 另外,本发明包括包含本发明组合物或由本发明组合物制备的制品,片材,薄膜,泡沫和纤维以及制造这些制品的方法,优选涉及拉伸本发明组合物的方法。 该工艺包括包括挤出或注射吹塑成型的工艺; 挤出或热成形本发明的组合物; 以及包括使本发明的组合物与偶联剂反应的方法。