摘要:
A propylene/ethylene/&agr;-olefin terpolymer characterized in that i) there is from 0.01 mol % to less than 15 mol % of a comonomer unit with a molar ratio of ethylene units/C4-C20 &agr;-olefin units being in the range of from 6.5×10−4 to 0.99, and from more than 85 mol % to not more than 99.99 mol % of a propylene unit with 2,1- and 1,3-propylene units being in the range of from 0 to 1 mol %, in a polymer chain determined by 13C-NMR spectroscopy; ii) a weight average molecular weight (Mw) determined by GPC is in the range of from 40,000 to 1,000,000; and iii) the amount of the component eluted in o-dichlorobenzene at a temperature of not higher than 40° C. is not more than 10 % by weight based on the total weight of the terpolymer and the amount of the component eluted in o-dichlorobenzene within the ±10° C. range of an elution peak temperature is not less than 75 % by weight based on the weight of the component eluted at a temperature of higher than 0° C.
摘要:
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.
摘要:
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.
摘要:
Disclosed is a process for producing olefin polymers or copolymers which can freely regulates the molecular weight of the polymers or copolymers as well as novel olefin polymers or copolymers excellent in rigidity, heat-resisting property and transparency, moldings and compositions thereof which find a wide variety of applications in versatile industrial parts including containers, films, sheets, filaments or fibers, featured by (1) a process for producing olefin polymers or copolymers by the aid of a catalyst comprised predominantly of the compounds: (A) a transition metal compound of the formula: Q(C5H4−mR1m)(C5H4−nR2n)MXY, (B) an aluminoxane, (C) a fine particulate carrier, and (D) an organoaluminum compound; (2) olefin polymers or copolymers characterized by (a) a specific ratio of isotactic pentad, (b) 2,1- and 1.3-propylene units contents in the polymer chain, (c) a specific Mw, (d) a specific Mw/Mn, and (e) in case of elevating temperature of o-dichlorobenzene continuously or stepwise up to given temperatures to measure the amount of eluated polyolefin at each temperature, the position of a main elution peak and the amount of components existing in the range of ±10° C. of the main elution peak; (3) injection moldings, films, filaments or fibers, and non-woven fabric of the polypropylene obtained; and (4) a composition comprising the polypropylene obtained and an &agr;-nucleating agent or a composition comprising the polypropylene and a radical generator and having been produced by subjecting to the mixture to melt-kneading.
摘要:
The present invention provides a metallocene compound which produces an olefin polymer having a high molecular weight with a high stereoregularity. The metallocene compound has the following formula (1): Q(C5H4-mR1m)(C5H4-nR2n)MXY (1) wherein (C5H4-mR1m) and (C5H4-nR2n) each independently represent a cyclopentadienyl group; C5H4-m and C5H4-n each independently represent a cyclopentadienyl ring; m represents an integer of 1-3; n represents an integer of 2 or 3; R1 and R2 are each independently a substituent bonded respectively to C5H4-m and C5H4-n, and represent a hydrocarbon group of 1-20 carbon atoms, a silicon-containing hydrocarbon group of 1-20 carbon atoms or a heteroaromatic group; each R1m and each R2n may be the same or different; one pair of R2's in the R2n are bonded to each other to form at least one ring; Q represents a divalent group for cross-linking (C5H4-mR1m) and (C5H4-nR2n); M represents a titanium atom, a zirconium atom or a hafnium atom; and X and Y are the same or different and each a hydrogen atom, a halogen atom or a hydrocarbon group.
摘要翻译:本发明提供茂金属化合物,其生产具有高立构规整性的具有高分子量的烯烃聚合物。 金属茂化合物具有下式(1):其中(C5H4-mR1m)和(C5H4-nR_2n)各自独立地表示环戊二烯基; C5H4-m和C5H4-n各自独立地表示环戊二烯基 环; m表示1-3的整数; n表示2或3的整数; R 1和R 2分别独立地表示与C5H4-m和C5H4-n键合的取代基,表示烃基 1-20个碳原子的含硅烃基或杂芳基;每个R 1 m和每个R 2可以相同或不同;一对R 2 R 2相互键合形成至少一个环; Q表示用于交联的二价基团(C 5 H 4 -m R m)和(C 5 H 4 -NR 2 n) M表示钛原子,锆原子或铪原子; X和Y相同或不同,各自为氢原子,卤素原子或烃基。
摘要:
An elastomeric polypropylene wherein (a) an isotactic pentad (I5) is 0.150-0.749, (b) a different bond due to a 2,1-insertion reaction is 0.11-20 mol %, (c) a different bond due to a 1,3-insertion reaction is 0-10 mol % and (d) a melting point (Tm) is 50-160° C., (a) to (c) being determined from 13C NMR spectra, which is obtainable by the polymerization of propylene using any one of a metallocene catalyst (I) comprising a metallocene compound (A), an activating compound (B) and if desired, an organoaluminum compound (C), a supported metallocene catalyst (II) prepared by supporting the metallocene catalyst (I) on a finely particulate support (D), and a supported metallocene catalyst (III) prepared by adding an organoaluminum compound (E) to the supported metallocene catalyst (II). In particular, it has excellent transparency and elastic characteristics.
摘要翻译:一种弹性体聚丙烯,其中(a)全同立构五单元组(I5)为0.150-0.749,(b)由于2,1-插入反应引起的不同键为0.11-20摩尔%,(c)由于1 ,3-插入反应为0-10摩尔%,(d)熔点(Tm)为50-160℃,(a)至(c)由13 C NMR谱确定,可通过 使用包含茂金属化合物(A)的茂金属催化剂(I),活化化合物(B)和如果需要的话,使用有机铝化合物(C),负载金属茂催化剂(II) 在精细颗粒载体(D)上的金属茂催化剂(I)和通过将有机铝化合物(E)加入到负载的茂金属催化剂(II)中制备的负载金属茂催化剂(III)。 特别是具有优异的透明性和弹性特性。