Abstract:
Die vorliegende Erfindung betrifft einen Katalysator für die Vernetzung von Siliconkautschukmassen mit einem Vernetzer auf Lactatbasis. Insbesondere stellt die vorliegende Erfindung eine Zusammensetzung zur Herstellung einer Siliconkautschukmasse mit einem Vernetzer auf Lactatbasis bereit, wobei die Zusammensetzung einen Katalysator umfasst, der mindestens zwei voneinander verschiedene Verbindungen umfasst, die unabhängig voneinander aus Metallsalzen von Carbonsäuren ausgewählt werden. Darüber hinaus stellt die vorliegende Erfindung ein Verfahren zur Herstellung einer solchen Zusammensetzung bereit, sowie eine Verwendung des Katalysators zum Vernetzen einer Siliconkautschukmasse, insbesondere zum Vernetzen einer Siliconkautschukmasse mit einem Vernetzer auf Lactatbasis, sowie eine Verwendung der erfindungsgemäßen Zusammensetzung zur Herstellung einer Siliconkautschukmasse, insbesondere zur Verwendung als Dichtungsmittel, Klebstoff oder Beschichtungsmittel.
Abstract:
Process for the preparation of a solid olefin polymerisation catalyst system, comprising an organometallic compound of a transition metal of Group 3 to 10 of the Periodic Table (IUPAC 2007) in the form of solid particles comprising the steps of I) generating an emulsion by dispersing a liquid clathrate in a solvent (S) wherein (i) the solvent (S) constitutes the continuous phase of the emulsion and comprises a nonreactive fluorinated synthetic oil having a viscosity at 20°C according to ASTM D445of at least 10 cSt up to 2000 cSt (ii) the liquid clathrate constitutes in form of droplets the dispersed phase of the emulsion, II) solidifying said dispersed phase to convert said droplets to solid particles and III) optionally recovering said particles to obtain said catalyst system, wherein the liquid clathrate comprises (a) a lattice being the reaction product of a1) a transition metal compound of formula (I) L m R n TX q wherein "T" is a transition metal of anyone of the groups 3 to 10 of the periodic table (IUPAC2007), preferably a transition metal of anyone of the groups 4 to 6 of the periodic table (IUPAC2007), more preferably titanium (Ti), zirconium (Zr) or hafnium (Hf), i.e. zirconium (Zr) or hafnium (Hf), each "X" is independently a monovalent s-ligand, each "L" is independently an organic ligand which coordinates to the transition metal (T), "R" is a bridging group linking said organic ligands (L), "m" is 2 or 3, preferably 2, "n" is 0, 1 or 2, preferably 1, "q" is 1, 2 or 3, preferably 2, m+q is equal to the valency of the transition metal (T), a2) a cocatalyst comprising aluminoxane a3) a compound being effective to form the lattice with the transition metal compound and/or the aluminoxaneand b) a hydrocarbon solvent (HS).
Abstract:
Process for preparing an improved solid procatalyst of a Ziegler-Natta catalyst system comprising the following steps: a) reacting an metal alkyl with the formula (I) Al(R 1 ) 3 , wherein each R 1 independently represents an alkyl group of 1 to 6 carbon atoms with an alkyl metal halide compound of the formula (II) Al(R 2 ) m X 3-m , wherein each R 2 independently represents an alkyl group of 1 to 6 carbon atoms; each X is independently a halogen; 0 ≤ m 2 ) or a gas containing oxygen (O 2 ) to give a second reaction product, c) either the first reaction product or the second reaction product is reacted with a magnesium compound of the formula (III) R 3 n (OR 4 ) 2-n Mg, wherein R 3 and R 4 independently represent a C 1 -C 20 alkyl group and 0≤ n ≤ 2 and n may or may not be an integer, yielding a procatalyst precursor d) optionally contacting the procatalyst precursor with an alkyl metal halide compound of the formula (II) and/or with a magnesium compound of the formula (III), and e) contacting either the procatalyst precursor or the reaction product of step d) with a titanium halide compound having the formula (IV) (OR 5 ) p TiX 2 4-p , wherein each R 5 independently represents a C 1 -C 20 alkyl group, each X 2 is independently a halogen; 0 ≤ p ≤ 3 and p may or may not be an integer, in order to yield the solid procatalyst and its use for the production of polyethylene homo- or copolymers with a PDI below 4 down to 3.
Abstract:
The present disclosure provides a Ziegler-Natta catalyst composition comprising a procatalyst, a cocatalyst and a mixed external electron donor comprising a first selectivity control agent, a second selectivity control agent and an activity limiting agent. A polymerization process incorporating the present catalyst composition produces a high-stiffness propylene-based polymer with a melt flow rate greater than about 50 g/ 10 min. The polymerization process occurs in a single reactor, utilizing standard hydrogen concentration with no visbreaking.
Abstract:
The invention relates to a solid metal compound comprising (i) a solid support comprising aluminium oxide, (ii) at least one first metal compound (C1) selected from metal hydrides, organometallic compounds and organometallic hydrides, and comprising a metal (M1) selected from the lanthanides, the actinides and the metals of Groups 4 to 7 of the Periodic Table of the Elements, and (iii) at least one second metal compound (C2) comprising a metal (M2) selected from the metals of Groups 8 to 10 of said Table. The compounds (Cl) and (C2) are preferably supported on, particularly grafted onto the solid support. The invention also relates to processes for preparing the solid metal compound, preferably comprising stage (1) comprising dispersing and preferably grafting (i) an organometallic precursor (Pr1) comprising the metal (M1) and (ii) a precursor (Pr2) comprising the metal (M2) onto the support, so as to produce the solid metal compound, and preferably stage (2) comprising contacting the solid metal compound thus obtained with hydrogen and/or a reducing agent. The invention also relates to the use of the solid metal compound in processes comprising hydrocarbon reactions optionally in the presence of hydrogen, and preferably involving the splitting and recombining of carbon-carbon and/or carbon-hydrogen and/or carbon-metal bonds, so as to produce final hydrocarbons different from the starting ones. The solid metal compound can be used in processes comprising alkane and/or alkene metathesis, non-oxidative methane coupling, alkene oligomerisation, methane-olysis of hydrocarbons, cross-metathesis and hydrogenolysis of hydrocarbons, e.g. saturated hydrocarbons, hydrocarbon polymers/oligomers or waxes, in the presence of hydrogen.
Abstract:
Disclosed is a method of preparing an ultra-high molecular weight, linear low density polyethylene with a catalyst system that comprises a bridged indenoindolyl transition metal complex, a non-bridged indenoindolyl transition metal complex, an alumoxane activator and a boron-containing activator. The ultra-high molecular weight, linear low density polyethylene has a weight average molecular weight greater than 1,000,000 and a density less than 0.940 g/cm 3 .
Abstract translation:公开了一种制备具有包含桥连茚基吲哚基过渡金属络合物,非桥连茚并吲哚基过渡金属络合物,铝氧烷激活剂和含硼活化剂的催化剂体系的超高分子量线性低密度聚乙烯的方法。 超高分子量线性低密度聚乙烯的重均分子量大于1,000,000,密度小于0.940g / cm 3。
Abstract:
A solid titanium catalyst component (I) characterized by comprising titanium, magnesium, a halogen, and a cyclic ester compound (a) specified by the following formula (1): (1) [wherein n is an integer of 5-10; R 2 and R 3 each independently is COOR 1 or R, provided that at least either of R 2 and R 3 is COOR 1 ; single bonds in the cyclic skeleton (the C a -C a bonds and the C a -C b bond in the case where R 3 is R are excluded) each may be a double bond; R 1 's each independently is a C 1-20 monovalent hydrocarbon group; and R's each independently is hydrogen or a substituent, provided that at least one of the R's is not hydrogen]. Use of the solid titanium catalyst component (I) enables the production of an olefin polymer having a wide molecular-weight distribution.
Abstract translation:一种固体钛催化剂组分(I),其特征在于包含由下式(1)表示的钛,镁,卤素和环状酯化合物(a):(1)[其中n为5-10的整数; R 2和R 3各自独立地为COOR 1或R 2,条件是R 2和/或 R 3是COOR 1; 循环骨架中的单键(C u> a u> u> u> u> u> 在R 3不包括R的情况下)各自可以是双键; R 1各自独立地是C 1〜20个一价烃基; 并且R各自独立地是氢或取代基,条件是R的至少一个不是氢]。 使用固体钛催化剂组分(I)可以生产具有宽分子量分布的烯烃聚合物。
Abstract:
A catalyst composition for the polymerization of propylene comprising one or more Ziegler-Natta procatalyst compositions comprising one or more transition metal compounds and one or more monoesters of aromatic carboxylic acid internal electron donors; one or more aluminum containing cocatalyts; and a mixture of two or more different selectivity control agents, said SCA mixture comprising from 70 to 98 mol percent of one or more esters of one or more aromatic monocarboxylic acids or substituted derivatives thereof, and from 30 to 2 mol percent of one or more alkoxysilane compounds containing one or more 5- or 6-membered cyclic groups optionally containing one or more Group 14, 15 or 16 heteroatoms.
Abstract:
It has been discovered that using di-sec-butyldialkoxysilanes, such as di-sec-butyldimethoxysilane (DSBDMS), as external electron donors for Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties and processing. The catalyst systems of the invention provide high activity, high bulk density, moderate hydrogen response, moderate donor response and high polydispersity (MWD). Suitable di-sec-butyldialkoxysilanes have the formula ( Bu)2Si(OR")2, where R" is independently a straight or branched alkyl group of 1-5 carbon atoms.
Abstract:
The additive compound of a carboxylic acid and a halide or of a rare earth or gallium halogenocarboxylate of the same acid is obtained by a method which consists in reacting with HX, X representing a halogen, and in a solvent selected among alkanes, cyclanes and aromatic solvents and their mixtures, a rare earth or gallium carboxylate, the reaction being carried out with an X/rare earth or gallium atomic ratio less than 3 when preparing a halogenocarboxylate. The second method of the invention concerns the preparation of an additive anhydrous compound of a rare earth or gallium halide and a nitrogen- or oxygen-donor compound which consists in preparing an additive compound of a carboxylic acid and a rare earth halide of the above type and in adding to the medium obtained a nitrogen- or oxygen-donor.