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    • 1. 发明授权
    • Polypropylene composition
    • 聚丙烯组成
    • US06326432B1
    • 2001-12-04
    • US09508799
    • 2000-03-17
    • Hiroyuki FujitaJun SaitoYoshitoyo YasudaTsutomu UshiodaMototake TsutsuiYoshiyuki OhgiMinoru Adachi
    • Hiroyuki FujitaJun SaitoYoshitoyo YasudaTsutomu UshiodaMototake TsutsuiYoshiyuki OhgiMinoru Adachi
    • C08F800
    • C08L23/12C08F110/06C08L23/16C08L2666/04C08F2500/03C08F2500/15
    • Disclosed is a polypropylene composition excellent in balance of low temperature impact-strength, rigidity, heat resistance and transparency, which is featured by comprising 20-95% by weight of a polypropylene defined in the following [I] and 5-80% by weight of a propylene-&agr;-olefin copolymer defined in the following [II]: [I] a polypropylene featured by having: (1) a ratio of isotactic pentad (mmmm) of 0.900-0.949, (2) the 2,1- and 1,3-propylene units in the polymer chain in the amount of 0-1 mole %, (3) a weight average molecular weight (Mw) of 40,000-1,000,000, (4) a ratio of a weight average molecular weight (Mw) to a number average molecular weight (Mn), i.e. (Mw)/(Mn) of 1.5-3.8, and (5) in case of elevating the temperature of o-dichlorobenzene continuously or stepwise up to given temperatures to measure the amount of eluted polypropylene at each temperature, the position of a main elution peak is 95-110° C. and the amount of components existing in the range of ±10° C. of the main elution peak is at least 90% of the total amounts of components eluted at a temperature higher than 0° C. and [II] a propylene-&agr;-olefin copolymer containing 10-90% by weight of a constituent derived from propylene and 10-90% by weight of a constituent derived from &agr;-olefin other than propylene.
    • 公开了低温冲击强度,刚性,耐热性和透明性的平衡优异的聚丙烯组合物,其特征在于包含20-95重量%的以下[I]中定义的聚丙烯和5-80重量% 的以下[II]中定义的丙烯-α-烯烃共聚物:[I]聚丙烯,其特征在于具有:(1)全同立构五单元组比(mmmm)为0.900-0.949,(2)2,1-和 聚合物链中的1,3-丙烯单元的量为0-1摩尔%,(3)重均分子量(Mw)为40,000-1,000,000,(4)重均分子量(Mw) 达到数均分子量(Mn),即(Mw)/(Mn)为1.5-3.8,和(5)在连续或逐步升高到给定温度的邻二氯苯温度下测量洗脱量 聚丙烯在每个温度下,主洗脱峰的位置为95-110℃,组分的存在量在±10℃的范围内 n洗脱峰为在高于0℃的温度下洗脱的组分的总量的至少90%,[II]含有10-90重量%的衍生自丙烯的组分和10重量%的丙烯-α-烯烃共聚物 -90重量%的除丙烯以外的α-烯烃的成分。
    • 4. 发明授权
    • Propylene copolymer and process for the production thereof
    • 丙烯共聚物及其制备方法
    • US06303698B1
    • 2001-10-16
    • US09486921
    • 2000-05-09
    • Tsutomu UshiodaJun SaitoMototake TsutsuiYoshitoyo YasudaHiroyuki FujitaYoshiyuki Ohgi
    • Tsutomu UshiodaJun SaitoMototake TsutsuiYoshitoyo YasudaHiroyuki FujitaYoshiyuki Ohgi
    • C08F21006
    • C08F210/06C08F4/61912C08F4/61927C08F4/65912C08F4/65916C08F4/61916C08F4/65927C08F236/20C08F2500/12C08F2500/11C08F2500/03C08F2500/24C08F2500/18
    • Disclosed is propylene copolymers produced by the aid of a specific metallocene catalyst system, wherein a percentage of mis-insertion in the copolymer is highly controlled and the copolymers possess beat-resisting property and a high melt strength and a low MFR and are narrow in molecular weight distribution excellent in particulate properties as well as a process for producing the copolymers possessing high steroregularity at a practical polymerzation temperature. The gist of the present invention resides in production of propylene copolymers wherein copolymerization with &agr;,&ohgr;-diene is carried out by the aid of a supported-type catalyst system comprised predominantly of the following compound (A), (B), (C) and (D) at a temperature above 45° C.: the compound (A): a specific metallocene compound represented by Q(C5H4−mR1m)(C5H4−nR2n) MXY, the compound (B): an aluminoxane, the compound (C): an organoaluminum compound, and the compound (D): a particulate carrier. An important feature of the propylene copolymers of the present invention resides in the fact that the copolymers are high stereoregular and have a ratio of a mis-inserted unit based on 2,1-insertion of propylene monomer in the total propylene insertion being defined within a specific range.
    • 公开了通过特定的茂金属催化剂体系制备的丙烯共聚物,其中共聚物中错误插入的百分比被高度控制,并且共聚物具有抗电阻性能和高熔体强度和低MFR并且分子窄 颗粒性能优异的重量分布以及在实际聚合温度下具有高立体规整性的共聚物的制备方法。 本发明的主旨在于制备丙烯共聚物,其中与α,ω-二烯的共聚合是借助于主要由以下化合物(A),(B),(C)组成的负载型催化剂体系进行的, 化合物(A):由化合物(B)表示的特定茂金属化合物:铝氧烷,化合物(C):有机铝化合物和化合物(D):a 颗粒载体。本发明的丙烯共聚物的一个重要特征在于这样的事实:共聚物是高立构规整性的,并且在总丙烯插入中丙烯单体的2,1-插入比例为错误插入单元 在特定范围内定义。