摘要:
Disclosed is a process for the preparation of metallocone complexes wherein stereoisomers of metallocene complexes formed at the time of synthesis can easily be separated. The gist of the present invention resides in separation of a part of an isomeric mixture of specific metallocene complexes bridged with a transition metal represented by the formula (1) as a complex having M—O bond. In particular, preferable is a process for separating a part of an isomeric mixture of a metallocene complex represented by the formula (2) as a &mgr;-oxo-complex represented by the formula (3).
摘要:
Disclosed are &mgr;-oxo-bis-metallocene complex compounds, catalysts for the polymerization of olefins comprising a &mgr;-oxo-bis-metallocene complex compound and at lease one cocatalyst selected from the group consisting of an aluminoxane, an ionic compound, and a Lewis acid, and a process for the polymerization of olefins. An example of the &mgr;-oxo-bis-metallocene complex compound is represented by the following formula (1): wherein, for example, M is zirconium, n is 1, Y is silicon, X is chloro, and R1-R10 maybe hydrogen or alkyl.
摘要:
A metallocene compound is provided wherein to a transition metal compound is bonded a multidentate compound wherein a substituted cycloalkadienyl ring CA1 having therein a heteroaromatic group Ra containing an oxygen, sulfur or nitrogen atom on a cycloalkadienyl ring, preferably the five-membered ring thereof, and an unsubstituted or substituted cycloalkadienyl group CA2 or —(R1)N—, —O—, —S— or —(R1)P—, preferably CA2, more preferably a substituted cycloalkadienyl group identical with CA1 are bonded through a divalent linking group. The metallocene compound is suitable as a principal ingredient of a catalyst for the polymerization of olefins, particularly achieving a very high effect in making the molecular weight of a polypropylene higher.
摘要:
A metallocene compound is provided wherein to a transition metal compound is bonded a multidentate compound wherein a substituted cycloalkadienyl ring CA1 having therein a heteroaromatic group Ra containing an oxygen, sulfur or nitrogen atom on a cycloalkadienyl ring, preferably the five-membered ring thereof, and an unsubstituted or substituted cycloalkadienyl group CA2 or —(R1)N—, —O—, —S— or —(R1)P—, preferably CA2, more preferably a substituted cycloalkadienyl group identical with CA1 are bonded through a divalent linking group. The metallocene compound is suitable as a principal ingredient of a catalyst for the polymerization of olefins, particularly achieving a very high effect in making the molecular weight of a polypropylene higher.
摘要:
A metallocene compound having an indenyl ligand substituted by a heteroaromatic group, which is useful as an olefin polymerization catalyst. The metallocene compound has the following structure wherein M is a transition metal atom; each Ra is a monocyclic or polycyclic heteroaromatic group; each R1 is halogen, a hydrocarbon group of 1-20 carbons, a halogenated hydrocarbon group of 1-20 carbons, etc., or adjacent R1's may be joined together to form a ring of 6-8 carbons; p and q are each 1-7; n and l are each 0 or 1-6; and each X is halogen, a hydrocarbon group of 1-20 carbons, a halogenated hydrocarbon group of 1-20 carbons, etc.
摘要:
A polymerizable liquid crystal composition excellent in storage stability and UV curing property and a polymer thereof are provided. The polymerizable liquid crystal composition contains a compound represented by formula (1) as a component (A), an optically active compound represented by formula (2) as a component (B), and a mixture of a photopolymerization initiator and a photosensitizer as a component (C), and a ratio of the component (A) is from 77 to 98% by weight, a ratio of the component (B) is from 1 to 15% by weight, and a ratio of the component (C) is from 1 to 8% by weight, based on a total weight of the composition: wherein Z independently represents a single bond or alkylene having from 1 to 10 carbon atoms; Y1 independently represents a single bond or —O—; R1 represents methyl or ethyl; A1 and A2 each independently represents 1,4-phenylene or 4,4′-biphenylene; Y2 represents —COO— or —OCO—; Q represents a single bond or oxyalkylene having from 1 to 10 carbon atoms; and p represents 0 or 1.
摘要翻译:提供了保存稳定性和UV固化性优异的聚合性液晶组合物及其聚合物。 可聚合液晶组合物含有作为组分(A)的由式(1)表示的化合物,作为组分(B)的由式(2)表示的光学活性化合物,以及光聚合引发剂和光敏剂作为 成分(C),成分(A)的比例为77〜98重量%,成分(B)的比例为1〜15重量%,成分(C)的比例为 1至8重量%,基于组合物的总重量:其中Z独立地表示单键或具有1至10个碳原子的亚烷基; Y 1独立地表示单键或-O-; R 1表示甲基或乙基; A 1和A 2各自独立地表示1,4-亚苯基或4,4'-亚联苯; Y 2表示-COO-或-OCO-; Q表示具有1至10个碳原子的单键或氧化烯; p表示0或1。
摘要:
A polymerizable liquid crystal composition excellent in storage stability and UV curing property and a polymer thereof are provided. The polymerizable liquid crystal composition contains a compound represented by formula (1) as a component (A), an optically active compound represented by formula (2) as a component (B), and a mixture of a photopolymerization initiator and a photosensitizer as a component (C), and a ratio of the component (A) is from 77 to 98% by weight, a ratio of the component (B) is from 1 to 15% by weight, and a ratio of the component (C) is from 1 to 8% by weight, based on a total weight of the composition: wherein Z independently represents a single bond or alkylene having from 1 to 10 carbon atoms; Y1 independently represents a single bond or —O—; R1 represents methyl or ethyl; A1 and A2 each independently represents 1,4-phenylene or 4,4′-biphenylene; Y2 represents —COO— or —OCO—; Q represents a single bond or oxyalkylene having from 1 to 10 carbon atoms; and p represents 0 or 1.