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    • 10. 发明申请
    • LINEAR LOW DENSITY POLYETHYLENE WITH UNIFORM OR REVERSED COMONOMER COMPOSITION DISTRIBUTION
    • 线性低密度聚乙烯具有均匀或反转的人气组合物分布
    • WO2010125022A1
    • 2010-11-04
    • PCT/EP2010/055519
    • 2010-04-26
    • BOREALIS AGGAROFF, ThomasWALDVOGEL, PäiviKALLIO, KalleERIKSSON, VirginieAITTOLA, AkiKOKKO, Esa
    • GAROFF, ThomasWALDVOGEL, PäiviKALLIO, KalleERIKSSON, VirginieAITTOLA, AkiKOKKO, Esa
    • C08F10/00C08F210/02C08L23/08
    • C08F210/16C08L2314/02C08F210/08C08F2500/12C08F2500/18C08F2500/08C08F2500/10
    • 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/m 3 , b) a C 4 -C 10 -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) (C 1 -C 4 - alkyl) m -AI-X 3-m1 , wherein X is chlorine, bromine, iodine or fluorine and m is 1 or 2.
    • 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%的馏分和e)通过升温洗脱分馏(TREF)分析,至少70重量%的结晶聚合物组分 具有洗脱温度范围为60℃至94℃且小于10重量%的洗脱温度范围为30℃至60℃的结晶聚合物组分,f)通过使用傅里叶变换红外光谱的凝胶渗透色谱法 (GPC-FTIR),通过凝胶渗透色谱与傅立叶变换红外光谱仪(GPC-FTIR)结合,分子量分布(MWD)基本恒定的短链支化谱,或g),反向短链支化谱 分子量分布(MWD),线性低密度聚乙烯是在特殊的齐格勒 - 纳塔前催化剂和式(Ⅳ)的卤化烷基铝助催化剂(C1-C4烷基)m-AI-X3- m1,其中X是氯,溴,碘或氟,m是1或2。