LINEAR LOW DENSITY POLYETHYLENE WITH UNIFORM OR REVERSED COMONOMER COMPOSITION DISTRIBUTION
    11.
    发明申请
    LINEAR LOW DENSITY POLYETHYLENE WITH UNIFORM OR REVERSED COMONOMER COMPOSITION DISTRIBUTION 有权
    线性低密度聚乙烯具有均匀或反转的人气组合物分布

    公开(公告)号:US20120053308A1

    公开(公告)日:2012-03-01

    申请号:US13318101

    申请日:2010-04-26

    IPC分类号: C08F4/646 C08F210/16

    摘要: Ziegler-Natta catalyzed linear low density polyethylene which satisfies the following conditions: a) a density, according to ISO 1183, of from 900 to 925 kg/m3, b) a C4-C10-comonomer content, determined by Fourier transform infrared spectroscopy, of 1 to 16 wt % c) a weight average molecular weight Mw, determined by gel permeation chromatography, of at least 200 000, d) wherein the linear low density polyethylene comprises, by Crystallisation Analysis Fractionation (CRYSTAF) an amorphous fraction soluble at a temperature below 30° C. of at most 10 wt % and a fraction crystallising between 60 to 75° C. of at least 35 wt % and e) by temperature rising elution fractionation (TREF) analysis, at least 70 wt % of a crystallising polymer component having an elution temperature range from 60° C. to 94° C. and less than 10 wt % of a crystallising polymer component having an elution temperature range from 30° C. to 60° and, f) by Gel Permeation chromatography using an Fourier transform infrared spectroscopy detector (GPC-FTIR), a substantially constant short chain branching profile across the molecular weight distribution (MWD) or g) by Gel Permeation chromatography coupled with Fourier transform infrared spectroscopy instruments (GPC-FTIR), a revers short chain branching profile across the molecular weight distribution (MWD), the linear low density polyethylene being produced in the presence of a special Ziegler-Natta procatalyst and a halogenated aluminium alkyl cocatalyst of the formula (IV) (C1-C4-alkyl)m-AI-X3-m1, wherein X is chlorine, bromine, iodine or fluorine and m is 1 or 2.

    摘要翻译: 齐格勒 - 纳塔催化的线性低密度聚乙烯,其满足以下条件:a)根据ISO 1183的密度为900至925kg / m 3,b)通过傅立叶变换红外光谱测定的C 4 -C 10共聚单体含量, c)通过凝胶渗透色谱测定的至少200000重量平均分子量Mw,d)其中线性低密度聚乙烯通过结晶分析分馏(CRYSTAF)包含在 温度低于30℃,至多10重量%,并且在60至75℃之间结晶至少35重量%的级分,e)通过升温洗脱分级(TREF)分析,至少70重量%的结晶 具有洗脱温度范围为60℃至94℃且小于10重量%的具有洗脱温度范围为30℃至60℃的结晶聚合物组分的聚合物组分,和f)通过凝胶渗透色谱法,使用 傅里叶变换inf (GPC-FTIR),通过与傅立叶变换红外光谱仪(GPC-FTIR)结合的凝胶渗透色谱法,通过分子量分布(MWD)基本恒定的短链支化谱,或g) 在分子量分布(MWD)下,在特殊的齐格勒 - 纳塔前催化剂和式(Ⅳ)的卤化烷基铝助催化剂(C 1 -C 4烷基)m-AI-X3存在下生产的线性低密度聚乙烯 -m1,其中X是氯,溴,碘或氟,m是1或2。

    Procatalyst for ethylene polymer production, method for its preparation
and use
    13.
    发明授权
    Procatalyst for ethylene polymer production, method for its preparation and use 失效
    用于乙烯聚合物生产的主催化剂,其制备和使用方法

    公开(公告)号:US5770540A

    公开(公告)日:1998-06-23

    申请号:US492799

    申请日:1995-06-20

    摘要: The invention relates to a procatalyst for the production of ethylene polymers, which procatalyst comprises an inorganic support, a chlorine compound carried on said support, a magnesium compound carried on said support, a titanium compound carried on said support, whereby the chlorine compound can be different from or the same as the magnesium compound and/or the titanium compound. The activity balance AB of the procatalyst in specified polymerization conditions, is AB>3.2 wherein AB=�(A+A'):2!.multidot.�log (MFR.sub.2 ':MFR.sub.2):(A-A')!, A means polymerization activity expressed an kg PE/g cat .multidot.h, MFR.sub.2 means the melt flow rate in g/min units at a load of 2,16 kg, according to the standard ISO 1133, the absence of the upper index ' means low melt flow rate polymerization and the presence of the upper index ' means high melt flow polymerization. This means that the catalyst activity is relatively independent of the presence of chain transfer agents.

    摘要翻译: 本发明涉及一种用于生产乙烯聚合物的前催化剂,其主催化剂包括无机载体,载体上携带的氯化合物,载体上的镁化合物,载于所述载体上的钛化合物,其中氯化合物可以是 与镁化合物和/或钛化合物不同或相同。 在规定的聚合条件下,前催化剂的活性平衡AB为AB> 3.2其中AB = [(A + A'):2] x [log(MFR 2':MFR 2):( A-A')]],A表示聚合活性 表示kg PE / g cat xh,MFR2是指根据ISO 1133标准,在2,16kg载荷下的熔体流动速率,单位为g / min,上限指数为“低熔体流动速率聚合”, 上指数的存在意味着高熔体流动聚合。 这意味着催化剂活性相对独立于链转移剂的存在。

    IMPROVED ETHYLENE POLYMERIZATION CATALYST COMPOSITION
    14.
    发明申请
    IMPROVED ETHYLENE POLYMERIZATION CATALYST COMPOSITION 审中-公开
    改进的乙烯聚合催化剂组合物

    公开(公告)号:US20120095172A1

    公开(公告)日:2012-04-19

    申请号:US13263173

    申请日:2010-04-26

    摘要: Ziegler-Natta catalyst composition capable of producing ethylene/alpha-olefins copolymers, particularly linear low density polyethylene; the composition having an improved stability of its behaviour during polymerization in respect to time. The Ziegler-Natta catalyst composition comprises: 1. Ziegler-Natta catalyst composition for the production of ethylene copolymers comprising A) a procatalyst, which procatalyst comprises a) an Al compound having the formula Al(alkyl)xCl3-x (I), where alkyl is an alkyl group with 1 to 12 and 0≦x≦3, b) a magnesium hydrocarbyloxy compound of formula Mg(OR1)2-n(R2)n (II), wherein each R1 and R2 is independently a C1-20 hydrocarbon residue which may optionally be substituted with halogen and 0≦n

    摘要翻译: 能够生产乙烯/α-烯烃共聚物,特别是线性低密度聚乙烯的齐格勒 - 纳塔催化剂组合物; 该组合物在聚合过程中相对于时间具有改进的其行为稳定性。 齐格勒 - 纳塔催化剂组合物包括:1.用于生产乙烯共聚物的齐格勒 - 纳塔催化剂组合物,其包含A)前催化剂,其前体催化剂包含a)具有式Al(烷基)xCl 3-x(I)的Al化合物,其中 烷基是具有1至12和0和nlE; x和nlE; 3,b)式Mg(OR 1)2-n(R 2)n(II)的镁烃氧基化合物的烷基,其中每个R 1和R 2独立地是C 1-20 可以任选被卤素取代的烃残基,n <2和c)式ClyTi(OR 3)4-y(III)的含氯钛化合物,其中R3是C2-20烃基,y是 1,2,3或4,化合物a),b)和c)负载在颗粒状无机载体上,B)式(Ⅳ)卤代烷基铝助催化剂(C 1 -C 4烷基)m-Al- X3-m,其中X是氯,溴,碘或氟,m是1或2。