摘要:
This invention relates to the use of titanium-based oxopolymers for preparing suitable catalysts for reactions of olefin polymerization and/or olefin and alpha-olefin copolymerization. The instant invention further discloses the synthesis of catalyst formulated from titanium-based oxopolymers, as well as its use for olefin polymerization and/or copolymerization reactions.
摘要:
A series of vinyl addition block polymers derived from functionalized norbornene monomers are disclosed and claimed. Specifically, a series of diblock and triblock polymers derived from norbornene monomers are disclosed. Also disclosed are the method of preparation of such block polymers, and their use in the fabrication of membranes which exhibit unique separation properties. Specifically, the membranes as disclosed herein are useful in the separation of organic volatiles from biomass and/or organic waste, including butanol, phenol, and the like.
摘要:
A polyethylene composition comprising the reaction product of ethylene and optionally one or more alpha-olefin comonomers in the presence of a catalyst composition comprising a multi-metallic procatalyst via solution polymerization; wherein said polyethylene composition is characterized by one or more of the following properties: a melt index, I2, measured according to ASTM D 1238 (2.16 kg @190°C), of from 0.9 to 5 g/10 min; density (measured according to ASTM D792) from 0.910 to 0.935 g/cc; a melt flow ratio, I 10 /I 2 , wherein I 10 is measured according to ASTM D 1238 (10 kg @ 190°C), of from 6 to 7.4; and molecular weight distribution (M w /M n ) of from 2.5 to 3.5 is provided.
摘要:
The invention relates to a method for manufacturing polylactide, comprising the steps of mixing lactide and a metal-coordination compound as polymerization catalyst to obtain a reaction mixture, polymerizing the lactide in liquid phase at a temperature of at least 150°C to form polylactide in liquid phase and allowing the polylactide to solidify, characterized in that the polymerization catalyst comprises a metal-ligand coordination compound whereby the parent ligand answers the formula (I), whereby R represents an H atom, an aliphatic group, a halide atom or a nitro group and the metal is at least one of Zr and Hf. The invented catalysts show kinetics which is comparable to the kinetics of the known Sn-octoate catalyst.
摘要:
The present invention relates to a dinuclear metallocene compound having a novel structure able to provide diverse forms of selectivity and activity with respect to copolymers, and relates to a production method therefor as well as to a production method for polyolefins using the dinuclear metallocene compound.
摘要:
The present invention generally relates to metal-ligand complexes, catalysts comprising or prepared from the metal-ligand complexes, processes of catalyzing olefin polymerization reactions with the catalysts to prepare polyolefins, polyolefins prepared thereby, processes of making the metal-ligand complexes and catalysts, and intermediate compounds useful therefor.
摘要:
A process for producing an olefin-based polymer, said process comprising polymerizing at least one monomer, in the gas phase, or in a slurry process, in the presence of at least the following components: A) at least one catalyst; B) at least one cocatalyst; C) a composition comprising at least one compound selected from formula (I), and/or at least one compound selected from formula (II): (R1CO 2 ) 2 A1OH (I), (R2) x N(R3OH) y (II); wherein R1 is a hydrocarbon radical containing from 13 to 25 carbons; R2 is a hydrocarbon radical containing from 14 to 26 carbons; R3 is a hydrocarbon radical containing from 1 to 4 carbons; and x + y = 3, and x has a value of 1 or 2. A process for producing an olefin-based polymer, said process comprising polymerizing at least one monomer in the presence of at least the following components: A) a Ziegler Natta type catalyst comprising at least two transition metals; B) a trialkylaluminum compound; C) optionally a composition comprising at least one compound selected from formula (I), and/or at least one compound selected from formula (II): (R1CO 2 ) 2 A1OH (I), (R2) x N(R3OH) y (II); wherein R1 is a hydrocarbon radical containing from 13 to 25 carbons; R2 is a hydrocarbon radical containing from 14 to 26 carbons; R3 is a hydrocarbon radical containing from 1 to 4 carbons; and x + y = 3, and x has a value of 1 or 2.
摘要翻译:一种制备烯烃基聚合物的方法,所述方法包括在至少以下组分的存在下,在气相或淤浆法中聚合至少一种单体:A)至少一种催化剂; B)至少一种助催化剂; C)包含至少一种选自式(I)的化合物和/或至少一种选自式(II)的化合物:(R 1 CO 2)2 AlOH(I),(R2)xN(R3OH)y(II) ; 其中R1是含有13-25个碳原子的烃基; R2是含有14-26个碳原子的烃基; R3是含有1至4个碳的烃基; 和x + y = 3,x的值为1或2.一种制备烯烃基聚合物的方法,所述方法包括在至少以下组分存在下聚合至少一种单体:A)齐格勒纳塔 型催化剂,其包含至少两种过渡金属; B)三烷基铝化合物; C)任选的包含至少一种选自式(I)的化合物和/或至少一种选自式(II)的化合物:(R 1 CO 2)2 AlOH(I),(R2)xN(R3OH)y ); 其中R1是含有13-25个碳原子的烃基; R2是含有14-26个碳原子的烃基; R3是含有1至4个碳的烃基; x + y = 3,x为1或2。
摘要:
The present invention discloses catalyst components based on ferrocenyl ligands, their method of preparation and their use in the polymerization of olefins.
摘要:
A catalyst combination ana a process for preparing physically crosslinked recyclable thermoplastic polyolefins of simplified processability. In particular the new catalyst combination and a process are useful and for preparing of super high molecular weight isotactic polymers and copolymers of monomodal Gauss like molecular weight distribution with both linear and cyclic olefinically unsaturated compounds as monomer having isotacticity being within the range of from 15 to 70% of [mmmm] pentad concentration, weight average molecular weight within the range from 300,000 to 4,000,000 gms/mol, polydispersity within the range from 1.4 to 12 and statistic distribution of stereoscopic errors along the polymer chain. The catalyst comprises bisphenoxyimine type complexes of transition metals in combination with MAO type activator.
摘要:
Catalyst systems and methods for olefin polymerization are disclosed. The polymerizations are performed in the presence of a clathrochelate which comprises a transition metal ion and an encapsulating macropolycyclic ligand. At least one of the capping atoms of the macropolycyclic ligand is a Group 3-10 transition metal or a Group 13 atom. When a capping atom is a Group 3-10 transition metal, the clathrochelate can be used with an activator to polymerize olefins. When a capping atom is a Group 13 atom, the clathrochelate can be used as an activator for an olefin polymerization. Clathrochelates allow polyolefin makers to fine tune catalyst reactivity and polyolefin properties.