摘要:
A process for preparing 1-butene polymers, comprising polymerizing 1-butene or copolymerizing 1-butene with ethylene, propylene or an alpha-olefin of formula CHT2=CHT wherein T is a C3-C10 alkyl group, in the presence of a catalyst system obtainable by contacting: A) a metallocene compound belonging to formula (I): wherein M is zirconium titanium or hafnium; X, equal to or different from each other, is a hydrogen atom, a halogen atom, a hydrocarbon radical optionally containing heteroatoms; R4, R5, R6, R7, R8, R9, R10, R11, R12 and R13 are hydrogen atoms, or C1-C4O hydrocarbon radicals optionally containing heteroatoms; R1, R2 and R3, are linear or branched, C1-C2o-alkyl radicals, optionally containing heteroatoms: B) a Jumoxane or a compound capable of forming an alkyl metallocene cation; and optionally C) organo aluminum compound.
摘要翻译:一种制备1-丁烯聚合物的方法,包括将1-丁烯或1-丁烯与乙烯,丙烯或式CHT 2 CH = CHT的α-烯烃聚合,其中T是C 3 在可以通过下述方法获得的催化剂体系存在下进行:A)属于式(I)的金属茂化合物:其中M是锆钛或铪; X彼此相同或不同,为氢原子,卤素原子,任选含有杂原子的烃基; R 4,R 5,R 6,R 7,R 8, R 9,R 10,R 11,R 12和R 13是 氢原子或任选含有杂原子的C 1 -C 40烃基; R 1,R 2和R 3是直链或支链的C 1 -C 2 O 任选地含有杂原子的烷基:B)Jumoxane或能够形成烷基金属茂阳离子的化合物; 和任选的C)有机铝化合物。
摘要:
A 1-butene/ethylene copolymer having a content of ethylene derived units from 0.1% to 5% by weight in which an ethylene content in the polymer (C2) and a melting point of the polymer (Tm) meet the following relation: Tm
摘要:
A process for polymerizing 1-butene, optionally with up to 30% by mol of ethylene, propylene or an alpha olefin of formula CH2═CHT wherein T is a C3-C10, alkyl group, in the presence of a catalyst system obtainable by contacting a metallocene compound of formula (I) Wherein M is an atom of a transition metal; X, is a hydrogen atom, a halogen atoms or a hydrocarbon group; R1, R2, R5, R6, R7, R8 and R9 are hydrogen atoms or hydrocarbon groups; with the proviso that at least one of R6 or R7 is a C1-C20 alkyl group; R3 and R4 are C1-C20 alkyl groups; and an alumoxane and/or a compound capable of forming an alkyl metallocene cation.
摘要:
A 1-butene homopolymer having the following characteristics: intrinsic viscosity (I.V.) >0.7 dL/g isotactic triads (mm) >70%; 4,1 insertions 400 Mpa; melting point >105° C.
摘要:
A process for producing a polymer of ethylene containing from 0.1 to 50% by weight of one or more derived units of alpha-olefins fo formula CH2═CHR, wherein R is a C2-C20 alkyl radical, comprising contacting, under ploymerization conditions, ethylene and one or more alpha-olefins in the presence of a catalyst system obtainable by contacting: a) a metallocene compound of formula (I) wherein: is zirconium titanium or hafminum, X, equal to or different from each other, is hydrogen halogen or an hydrocarbyl radical, R1, R2, R3, R4, R5, R6, R7, R8 and R9, equal to or different from each other are hydrogen atoms, halogen atoms, or hydrocarbyl radicals; and b) an alumoxane or a compound capable of forming an alkyl metallocene cation.
摘要:
A new class of methylene-bridged metallocenes of formula (I), wherein M is a transition metal of group 3, 4, 5, 6, lanthanide or actinide; X is a monoanionic sigma ligand; R1 can be alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl radicals; R2 can be halogen, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl radical; p is 0-3; m is 0-2; and n is 0-4. Furthermore, the corresponding ligands, a new process for their preparation and catalysts systems containing said methylene-bridged metallocenes are described.
摘要翻译:一类新的式(I)亚甲基桥接金属茂,其中M是第3,4,5,6族,镧系元素或锕系元素的过渡金属; X是单阴离子Σ配体; R 1可以是烷基,环烷基,芳基,烷基芳基或芳基烷基; R 2可以是卤素,烷基,环烷基,芳基,烷基芳基或芳基烷基; p为0-3; m为0-2; n为0-4。 此外,描述了相应的配体,其制备新方法和含有所述亚甲基桥接金属茂的催化剂体系。
摘要:
An organometallic compound obtainable by contacting a) a compound having the following formula (I): wherein Ra, Rb, Rc and Rd equal to or different from each other are hydrocarbon groups b) a Lewis acid of formula (II) MtR13 (II) wherein Mt is a metal belonging to Group 13 of the Periodic Table of the Elements (IUPAC); R1, equal to or different from each other, are selected from the group consisting of halogen, halogenated C6-C20 aryl and halogenated C7-C20 alkylaryl groups; two R1 groups can also form with the metal Mt one condensed ring. These compounds are useful as cocatalysts for polymerizing olefins.
摘要:
Ethylene based copolymers having high molecular weights, narrow molecular weight distributions, and a very good homogeneous distribution of the comonomer units can be obtained in high yields at temperatures of industrial interest, by carrying out the polymerization reaction in the presence of metallocene catalysts comprising particular bridged bis-indenyl compounds substituted in the 3-position on the indenyl groups.
摘要:
Metallocene compounds having two fluorenyl ligands bridged with a single silicon or germanium atom, said atom having two substituent groups containing a total of at least four carbon atoms, are useful as catalyst components for the polymerization of olefins. Particularly, it is possible to prepare high molecular weight atactic polypropylene with improved yields with respect to the known catalysts.
摘要:
Propylene copolymer composition comprising a propylene copolymer (A) having a comonomer content in the range of equal or more than 0.5 to equal or below 2.0 wt.-%, the comonomers are C5 to C12 α-olefins, and a propylene copolymer (B) having a comonomer content in the range of equal or more than 4.0 to equal or below 10.0 wt.-%, the comonomers are C5 to C12 α-olefins, wherein further the propylene copolymer composition has a comonomer content in the range of equal or more than 3.5 to equal or below 7.0 wt.-%, the comonomers are C5 to C12 α-olefins, and the weight ratio of the propylene copolymer (A) to the propylene copolymer (B) is in the range of 20/80 to below 55/45.