摘要:
A class of bridged or unbridged metallocene compounds is disclosed, wherein the cyclopentadienyl ligands have two or four adjacent substituents forming one or two alkylenic cycles of from 4 to 8 carbon atoms. These metallocenes are useful as catalyst components for the polymerization of olefins, particularly for the (co)polymerization of ethylene and for the polymerization of propylene.
摘要:
A nanocomposite composition having improved mechanical properties containing, A. about 5 to about 20 wt % of a compatibilizing dispersant chosen from an olefin polymer peroxide, an ionomer of an olefin polymer peroxide, a grafted olefin polymer peroxide, an mixtures thereof; B. about 1 to about 15 wt % of a smectite clay; and C. about 65 to about 94 wt % of an olefin polymer material; wherein the sum of components A+B+C is equal to 100 wt %.
摘要翻译:具有改进的机械性能的纳米复合材料组合物,包含约5至约20重量%的选自烯烃聚合物过氧化物,烯烃聚合物过氧化物的离聚物,接枝烯烃聚合物过氧化物及其混合物的相容性分散剂。 B.约1至约15重量%的绿土粘土; 和约65至约94重量%的烯烃聚合物材料; 其中组分A + B + C的总和等于100重量%。
摘要:
A process for making a graft copolymer of an olefin polymer material in at least two polymerization stages comprising: a) irradiating an olefin polymer material at a temperature of about 10° C. to about 85° C. with high energy ionizing radiation, thereby forming an irradiated olefin polymer material (A); b) treating the irradiated olefin polymer material (A) at a temperature from about 25° C. to about 90° C. with about 5 to about 120 pph of at least one grafting monomer which is polymerizable by free radicals, thereby forming a stage b) graft copolymer; c) treating the stage b) graft copolymer at a temperature from about 25° C. to about 90° C., which is the same as or different from the temperature used in stage b), with about 5 to about 120 pph of at least one grafting monomer which is different from the monomer used in stage b) and polymerizable by free radicals.
摘要:
Filled olefin polymer concentrates having improved mechanical properties and scratch resistance comprising: A. about 1.0 to about 40.0 wt % of an oxidized olefin polymer material; B. about 0.5 to about 40.0 of a maleated polypropylene; and C. about 7.0 to about 80.0 wt % of a filler chosen from fiberglass, carbon fibers, graphite fibers, whiskers, metal fibers, aramides, talc, wollastonite, calcium carbonate, mica, glass microspheres, ceramic microspheres, glass wool, rock wool, stainless steel wool, steel wool, gypsum, alumina, alumina-silica, silica, and mixtures thereof; wherein the sum of components A+B+C is equal to 100 wt %.
摘要:
A process for making a graft copolymer of an olefin polymer material in at least two polymerization stages comprising: a) treating a reactive, peroxide-containing olefin polymer material (A) at a temperature from about 80° C. to a temperature below the softening point of the polymer material with about 5 to about 120 parts per hundred parts of the polymer material (A) by weight (pph) of at least one grafting monomer which is polymerizable by free radicals; b) treating the stage a) graft copolymer at a temperature from about 80° C. to a temperature below the softening point of the stage a) graft copolymer, which is the same as or different from the temperature used in stage a), with about 5 to about 120 pph of at least one grafting monomer which is different from the monomer used in stage a) and polymerizable by free radicals.
摘要:
An irradiated butene-1 polymer material characterized by high melt strength and softness, and composiiton of this high melt strength butene-1 polymer with non-irradiated butene-1 polymer materials having enhanced crystallization properties.
摘要:
A weight bar for use with a dumbbell having an externally-threaded end is provided that includes a substantially cylindrical elongated bar having a longitudinal axis, first and second axial ends and an intermediate section extending between the axial ends. The first and second axial ends each comprise internally-threaded sections disposed substantially along the longitudinal axis of the weight bar for threadably receiving an externally-threaded end of a dumbbell. The internally-threaded sections of the first and second axial ends each comprise threads having substantially flat thread ends.