Process for the preparation of an olefin polymer

A very effective catalyst system for olefin polymerization consists of a cocatalyst, preferably an aluminoxane, and a metallocene of the formula (I) (* CHEMICAL STRUCTURE *) (I) in which, preferably, M1 is Zr, R1 and R2 are alkyl or halogen, R3 to R6 are alkyl, -(CR8R9)m-R7-(CR8R9)n- is a chain having one or more members, in which R7 can also be a (substituted) hetero atom, and m+n is zero or 1. The catalyst system leads to polymers of variable molecular weight and stereotacticity, depending on the substituents R3 to R6 chosen, at polymerization temperatures which are relevant in industry.

Process for the preparation of an olefin polymer using metallocenes having specifically substituted indenyl ligands

A very active catalyst system for olefin polymerization comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I or Ia ##STR1## in which, preferably, M 1 is Zr or Hf, R 1 and R 2 are alkyl or halogen, R 3 and R 4 are hydrogen or alkyl, R 5 and R 6 are alkyl, --(CR 8 R 9 ) m --R 7 --(CR 8 R 9 ) n is a chain with one or more members, in which R 7 can also be a (substituted) heteroatom, and m+n is zero or 1.

Bridged, chiral metallocenes, processes for their preparation and their use as catalysts

Bridged, chiral metallocenes, processes for their preparation and their use as catalysts Metallocenes of the formula I ##STR1## in which, preferably, M 1 is titanium, zirconium or hafnium, R 1 is a radical ##STR2## in which M 2 is carbon or silicon, R 4 and R 5 are identical and are hydrogen or an alkyl group, p is 1 or 2, R 2 is hydrogen or an alkyl group and the radicals R 3 are identical and are halogen or an alkyl group, form, together with an aluminoxane as a cocatalyst, a suitable catalyst system for olefin polymerization.

Process for the preparation of bridged, chiral metallocene catalysts of the bisindenyl type

A process for the preparation of a compound of the formula III ##STR1## comprising, deprotonating a solution or suspension of an indene of the formula I ##STR2## in a solvent or solvent mixture containing a base to give a suspension of a metallated product of the compound of formula I, adding to the suspension of the metallated product a compound of the formula II X--R.sup.6 --X (II) and reacting the suspension of the metallated product and compound of the formula II.

2-Substituted bisindenyl-metallocenes, process for their preparation and their use as catalysts for the polymerization of olefins

Metallocenes having benzo-fused indenyl derivatives as ligands, processes for their preparation and their use as catalysts

Metallocenes having benzo-fused indenyl derivatives as ligands, processes for their preparation and their use as catalysts A very effective catalyst system for olefin polymerization comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## in which, preferably, M 1 is Zr or Hf, R 1 and R 2 are halogen or alkyl, R 3 is alkyl, R 4 to R 10 are alkyl or hydrogen and R 11 is a (substituted) alkylene or heteroatom bridge.

Process for preparing high molecular weight polyolefines

Metallocenes, process for their preparation and their use as catalysts

The present invention relates to a polynuclear metallocene compound of the formula I <IMAGE> (I) a process for their preparation and their use as a catalyst for olefin polymerization.

Metallocenes, and their use as catalysts

The present invention relates to a stereorigid metallocene compound containing, as ligands, at least two substituted or unsubstituted cyclopentadienyl groups which are bonded to one another via a monocyclic or polycyclic ring system, where at least one cyclopentadienyl group is fused to the monocyclic or polycyclic ring system, and to a process for the preparation of a cycloolefin copolymer. The cycloolefin copolymers obtained in this way have high tear strengths and are suitable for the production of extrusion parts and injection moldings.

Catalyst system comprising two zirconocenes and aluminoxane

A catalyst system comprising an aluminoxane and a transition-metal component (metallocene) is used, the transition-metal component comprising at least one zirconocene of the formula I ##STR1## and at least one zirconocene of the formula Ia or alternatively at least 2 zirconocenes of the formula I.

Metal complexes with heterocycles carbenes

A complex of the formula [LaMbXc]n(A)n I as described in the application useful as homogenous catalysts.

聚合催化剂体系、它们的制备及用途

本发明一般涉及一种用于聚合烯烃的被载带的催化剂体系。用于载带本发明的催化剂的方法提供了一种被载带的体积大的配位体过渡金属催化剂，当用于聚合过程中时，该催化剂大大地减少了反应器在气相、淤浆或液相聚合过程中的淤塞和结片。

Process for the production of epoxy polyadducts

Processo para preparação de olefinas aromáticas

Copolimeros,processo para sua preparação

ポリ−１−オレフィンの製造方法

Process for the preparation of a syndiotactic polyolefin

A very active catalyst system for olefin polymerization is composed of an aluminoxane and a metallocene of the formula I ##STR1## in which, preferably, M 1 is Zr or Hf, R 1 and R 2 are alkyl or halogen, R 3 and R 4 are hydrogen, R 5 and R 6 are alkyl or haloalkyl, --(CR 8 R 9 ) m --R 7 --(CR 8 R 9 ) n -- is a single-membered or multimembered chain in which R 7 may furthermore be a (substituted) hetero atom, m+n is zero or 1 and R 10 is hydrogen. The catalyst system gives polymers having high stereospecificity and a high melting point.

Process for the preparation of a high molecular weight olefin polymer

A very active catalyst system for olefin polymerization is composed of an aluminoxane and a metallocene of the formula I ##STR1## wherein preferably M 1 is Zr or Hf, R 1 and R 2 are alkyl or halogen, R 3 and R 4 are hydrogen, R 5 and R 6 are alkyl or haloalkyl, --(CR 8 R 9 ) m --R 7 --(CR 8 R 9 ) m --is a single-membered or multimembered chain in which R 7 may also be a (substituted) hetero atom, and m+n is zero or 1. The catalyst system gives polymers having a high molecular weight and high stereospecificity.

Metallocenes with ligands from 2-substituted indenyl derivatives, processes for their preparation and their use as catalysts

[UNK]

Olefin polymerization catalyst, process for its preparation, and its use

A supported polymerization catalyst which is applicable in all polymerization processes is comprised of the reaction product of (A) a supported organoaluminum compound and (B) a metallocene catalyst component.

Process for the preparation of polyolefins

The invention relates to a process for the preparation of polyolefins by polymerizing olefins of the formula CH2CHR in which R=H or C1-C10 alkyl, on their own or as a mixture, if appropriate together with C4-C12 alpha , omega -diolefins, in solvents, liquid monomers or the gas phase, at temperatures between -50 DEG and 200 DEG C., using a catalyst system composed of a soluble, halogen-containing transition metal compound of the general formula (cyclopentadienyl)2 Me R Hal in which R is cyclopentadienyl or a C1-C6 alkyl radical or a halogen, in particular chlorine, Me is a transition metal, in particular zirconium, and Hal is a halogen, in particular chlorine, and a compound, containing aluminum, of the aluminoxane type having the general formulae Al2OR4(Al(R)-O)n for a linear aluminoxane and/or (Al(R)-O)n+2 for a cyclic aluminoxane, in which n is a number from 4 to 20 and R is a methyl or ethyl radical, preferably a methyl radical.

Process for the preparation of optically active polyolefins

Process for the preparation of optically active polyolefins by polymerizing olefins of the formula CH 2 ═CHR in which R═C 1 C 10 -alkyl in the presence of an optically active catalyst system composed of an optically active transition metal compound containing only enantiomer (R- or S-form) of a stereorigid, chiral transition metal compound and an aluminum-containing compound of the aluminoxane type.

Process for the preparation of a syndiotactic polyolefin

A syndiotactic polyolefin is obtained in a high yield by polymerization or copolymerization of an olefin of the formula R a --CH═CH--R b in the presence of a catalyst consisting of a metallocene of the formula I ##STR1## and an aluminoxane. This polyolefin has a very high syndiotactic index. At a low polymerization temperature, a polyolefin having a low average molecular weight and narrow molecular weight distribution is obtained, and at a high polymerization temperature a polymer having a high average molecular weight and a wide molecular weight distribution is obtained. Shaped articles produced from the polymers are distinguished by a high transparency, flexibility, tear strength and excellent surface gloss.

2-substituted disindenylmetallocenes, process for their preparation, and their use as catalysts in the polymerization of olefins

The novel metallocenes of the formula I ##STR1## in which, preferably, M 1 is Zr or Hf, R 1 and R 2 are alkyl or halogen, R 3 and R 4 are hydrogen, R 5 and R 6 are alkyl or haloalkyl, --(CR 8 R 9 ) m --R 7 --(CR 8 R 9 ) n -- is a single- or multi-membered chain in which R 7 may also be a (substituted) hetero atom, and m+n is zero or 1, form, together with aluminoxanes as cocatalysts, a very effective catalyst system for the preparation of polyolefins of high molecular weight.

Process for the preparation of an olefin polymer

A very effective catalyst system for olefin polymerization consists of a cocatalyst, preferably an aluminoxane, and a metallocene of the formula (I) and R2 are alkyl or halogen, R3 to R6 are alkyl, -(CR8R9)m-R7-(CR8R9)n- is a chain having one or more members, in which R7 can also be a (substituted) hetero atom, and m+n is zero or 1. The catalyst system leads to polymers of variable molecular weight and stereotacticity, depending on the substituents R3 to R6 chosen, at polymerization temperatures which are relevant in industry.

Process for the preparation of a high molecular weight olefin polymer

A very active catalyst system for olefin polymerization comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## in which, preferably, M 1 is Zr or Hf, R 1 and R 2 are alkyl or halogen, R 3 is hydrogen, R 4 to R 6 and alkyl or aryl, --(CR 8 R 9 ) m --R 7 --(CR 8 R 9 ) n is a single- or multi-membered chain, in which R' can also be a (substituted) hetero atom, and m+n is zero or 1.

Metallocene compound

The invention relates to a metallocene compound of the formula I <IMAGE> (I) where the two indenyl ligands have substitution patterns different from one another. The metallocene compound can be used as catalyst component for olefin polymerization.

Metallocene compound

The present invention relates to a metallocene compound of the formula I ##STR1## which can advantageously be used as catalyst component for olefin polymerization.

Process for the preparation of polyolefins

A process for the preparation of an olefin polymer by polymerization or copolymerization of an olefin of the formula R a --CH═CH--R b , in which R a and R b are identical or different and are a hydrogen atom or a hydrocarbon radical having 1 to 14 carbon atoms, or R a and R b , together with the atoms connecting them, can form a ring, at a temperature of from -60° to 200° C., at a pressure of from 0.5 to 100 bar, in solution, in suspension or in the gas phase, in the presence of a catalyst formed from a metallocene in the meso-form or a meso:rac mixture, with meso:rac>1:99, as transition-metal compound and a cocatalyst, wherein the metallocene is a compound of the formula I, ##STR1## in which M 1 is Zr or Hf, R 1 and R 2 are identical or different and are methyl or chlorine, R 3 and R 6 are identical or different and are methyl, isopropyl, phenyl, ethyl or trifluoromethyl, R 4 and R 5 are hydrogen or as defined for R 3 and R 6 , or R 4 forms an aliphatic or aromatic ring with R 6 , or adjacent radicals R 4 form a ring of this type, and R 7 is a ##STR2## radical, and m plus n is zero or 1.

Process for the preparation of oligomeric aluminoxanes

The present invention relates to a process for the preparation of oligomeric alkylaluminoxanes of the general formulae: ##STR1## in which R=C 1 -C 6 -alkyl, preferably methyl, and n=2-40, preferably 10-20, by reacting aluminum salts containing water of crystallization, preferably aluminum sulfate containing water of crystallization, with an aluminum trialkyl, preferably aluminum trimethyl. Aluminoxanes of this type can be used as a catalyst component in the preparation of high-activity, homogeneous Ziegler catalysts.

Process for preparing high molecular weight polyolefines

A very effective catalyst system for olefin polymerisation consists of an aluminoxane and of a metallocene of the formula I <IMAGE> in which, preferably, M<1> is Zr or Hf, R<1> and R<2> are alkyl or halogen, R<3> and R<4> are hydrogen, R<5> and R<6> are alkyl or haloalkyl, -(CR<8>R<9>)m-R<7>-(CR<8>R<9>)n- is a chain with one or more members in which R<7> can also be a (subst.) hetero atom and m+n is zero or 1. The catalyst system provides polymers with high molecular mass and high stereospecificity.

Verfahren zur kontinuierlichen Polymerisation von Trioxan oder zur Mischpolymerisation von Trioxan mit anderen Comonomeren

Process for the manufacture of alternate copolymers of acrylonitrile and olefins

Die Erfindung betrifft ein Verfahren zur Herstellung von alternierenden Copolymeren aus ungesättigten polaren Verbindungen und Olefinen in Gegenwart von Komplexierungsmitteln, wobei das Komplexierungsmittel aus dem primär gebildeten Copolymer-Metallverbindung-Komplex in einfacher Weise und in wiederverwendbarer Form zurückzugewonnen werden kann. Die Copolymerisation wird in Gegenwart von Salzen wie Nitraten, bevorzugt aber Halogeniden zweiwertiger Metallionen als Komplexbildner in organischen Lösungsmitteln bei Drucken bis zu ca. 100 bar und bei Temperaturen, die zwischen -78°C und 100°C liegen unter Verwendung radikalischer Initiatoren durchgeführt. Das Reaktionsprodukt besteht aus einem Gemisch des streng alternierend aufgebauten Copolymerisats aus ungesättigter polarer Verbindung und Olefin, sowie aus einem an der ungesättigten polaren Verbindung reicheren Copolymeren. Das alternierende Copolymere läßt sich daraus durch Extraktion mit Lösungsmitteln wie Trichlormethan oder Aceton leicht abtrennen. The invention relates to a process for the preparation of alternating copolymers of unsaturated polar compounds and olefins in the presence of complexing agents, the complexing agent being able to be recovered from the copolymer-metal compound complex formed in a simple manner and in a reusable form. The copolymerization is carried out in the presence of salts such as nitrates, but preferably halides of divalent metal ions as complexing agents in organic solvents at pressures up to about 100 bar and at temperatures which are between -78 ° C. and 100 ° C. using free radical initiators. The reaction product consists of a mixture of the strictly alternating copolymer of unsaturated polar compound and olefin, and of a copolymer richer in the unsaturated polar compound. The alternating copolymer can easily be separated from it by extraction with solvents such as trichloromethane or acetone.

Process for the manufacture of alternate copolymers of unsaturated polar compounds and olefins

Olefin polymerization and a catalyst therefor

1287396 Polymerization of olefins FARBWERKE HOECHST AG 11 May 1970 [10 May 1969] 22661/70 Heading C3P [Also in Division C2] Ethylene is polymerized, optionally with up to 10% by weight of another alpha-olefin of the formula R-CH = CH 2 wherein R is C 1-13 hydrocarbon, in solution, in suspension or in the gaseous phase, at a temperature of 20-160‹ C. and pressure of up to 20 atmospheres, in the presence of a catalyst comprising (A) the reaction product of a halogen-free magnesium compound containing 0À2-2À0 mols. of hydroxy groups per gram-atom of magnesium with an alcohol, a titanium tetraalcoholate and titanium chloride, and (B) an organoaluminium compound. In the examples:-(a) ethylene is polymerized using (A) the reaction product of Mg(OH) 2 , TiCl 4 , Ti(OiC 3 H 7 ) 4 and isopropanol or isobutanol; and (B) Al(C 2 H 5 ) 3 ; and (b) a copolymer of ethylene and butene-1 is prepared using (A) the reaction product of TiCl 4 , Ti(OiC 3 H 7 ) 4 , isopropanol and the product obtained by treating MgCl 2 .6H 2 O with aqueous NaOH and Na 2 CO 3 and (B) Al(iC 4 Ha) 3 .

METHOD OF MANUFACTURING A CATALYST

Process for the preparation of a catalyst and catalyst used in olefin polymerization

When reacting the reaction product of silicon dioxide and/or a metal oxide and a Grignard compound with a soluble titanium compound, there is obtained a catalyst for the polymerization of 1-olefins, which gives a very high yield and allows a good control of the molecular weight by means of hydrogen without making necessary a separation of the excess of metallo-organic compounds and/or the excess of titanium compounds from the catalyst carrier.

Ethylene copolymers and their use for the manufacture of films

Copolymers of ethylene and higher 1-olefins which are suitable for the manufacture of thin films, are preferably prepared in a two-step process, the first step yielding a polymer having a high molecular weight, the second step giving a polymer having a low molecular weight. The films obtained from these copolymers have improved mechanical properties as compared to films manufactured from known corresponding raw materials. The mechanical properties are furthermore uniform in longitudinal and in transverse direction.

Process for the preparation of a poly-1-olefin

PROCEDURE FOR THE PREPARATION OF A HIGH MOLECULAR WEIGHT OLEPHINIC POLYMER.

UN SISTEMA DE CATALIZADORES MUY ACTIVO PARA LA POLIMERIZACION OLEFINICA SE COMPONE DE UN ALUMINOXANO Y UN METALOCENO DE LA FORMULA I DONDE M ELEVADO 1 SIGNIFICA PREFERENTEMENTE ZR O HF, R ELEVADO 1 Y R (AL CUADRADO) ALQUIL O HALOGENO, R ELEVADO 3 Y R ELEVADO 4 HIDROGENO, R ELEVADO 5 Y R ELEVADO 6 ALQUIL O HALOALQUIL, -(CR ELEVADO 8 R ELEVADO 9)M-R ELEVADO 7(CR ELEVADO 8 R ELEVADO 9)N ES, DONDE R ELEVADO 7 TAMBIEN PUEDE SER (SUSTITUIDO) HETEROATOMO Y M + N CERO O 1. EL SISTEMA DE CATALIZADOR CONSIGUE POLIMEROS CON ALTA MASA MOLECULAR Y ALTA ESTEREO ESPECIFICACION. A VERY ACTIVE CATALYST SYSTEM FOR OLEFINIC POLYMERIZATION IS COMPOSED OF AN ALUMINOXANE AND A METALLOCHENE OF THE FORMULA I WHERE M ELEVATED 1 MEANS PREVIOUSLY ZR OR HF, R ELEVATED 1 YR (AL SQUARE) ALKYL AND HALOGE 3 HYDROGEN, R ELEVATED 5 YR ELEVATED 6 RENT OR HALO ALKYL, - (CR ELEVATED 8 R ELEVATED 9) MR ELEVATED 7 (CR ELEVATED 8 R ELEVATED 9) N IS, WHERE R ELEVATED 7 CAN ALSO BE (REPLACED) HETEROATOMO OR 1. THE CATALYST SYSTEM GETS POLYMERS WITH HIGH MOLECULAR MASS AND HIGH STEREO SPECIFICATION.

2-Substituted bisindenyl metallocenes, process for their preparation and their use as catalysts in olefin polymerization.

Procedimiento para la preparacion de poliolefinas con amplia distribucion de masas moleculares.

POLIOLEFINAS CON UNA DISTRIBUCION DE MASA MOLECULAR MW/MN MAYOR O IGUAL A 3 QUE PUEDEN SER MONOMODALES, BIMODALES O MULTIMODALES, SE OBTIENEN A TRAVES DE LA POLIMERIZACION O COPOLIMERIZACION DE OLEFINAS DE LA FORMULA RCH = CHR, EN DONDE SE UTILIZA UN SISTEMA CATALIZADOR COMPUESTO DE UN ALUMINOXANO Y UN COMPONENTE METALICO DE TRANSICION (METALOCENO), Y DONDE EL COMPONENTE METALICO DE TRANSICION SE COMPONE AL MENOS DE UN ZIRCONOCENO DE LA FORMULA I Y AL MENOS UN ZIRCONOCENO DE LA FORMULA IA O DE FORMA ALTERNATIVA DE AL MENOS 2 ZIRCONOCENOS DE LA FORMULA I.

[UNK]

Metalloseenejä ja niiden käyttö katalyytteinä

Metal complex compounds containing heterocyclic carbenes

POLYMERIZATION CATALYST SYSTEMS, THEIR PRODUCTION AND USE.

ESTA INVENCION ESTA DIRIGIDA GENERALMENTE HACIA UN SISTEMA CATALIZADOR SOPORTADO UTIL PARA POLIMERIZACION DE OLEFINAS. EL METODO PARA SOPORTAR EL SISTEMA CATALIZADOR DE LA INVENCION PROPORCIONA UN CATALIZADOR DE METALOCENO SOPORTADO Y UN ACTIVADOR DE ALUMOXANO QUE CUANDO SE UTILIZA EN UN PROCESO DE POLIMERIZACION REDUCE SUSTANCIALMENTE EL ATASCO Y COBERTURA DEL REACTOR. THIS INVENTION IS GENERALLY DIRECTED TOWARDS A SUPPORTED CATALYST SYSTEM USEFUL FOR OLEPHINE POLYMERIZATION. THE METHOD FOR SUPPORTING THE CATALYST SYSTEM OF THE INVENTION PROVIDES A SUPPORTED METALOCHENE CATALYST AND ALUMOXANE ACTIVATOR WHICH, WHEN USED IN A POLYMERIZATION PROCESS, REDUCES SUBSTANTIALLY JAM AND REACTOR COVERAGE.

Process for the preparation of a poly-1-olefin

Process for preparing a polyolefin

Olefins of the formula <IMAGE> (R<11> and R<12> are H or C1-C14-alkyl) are polymerised in the presence of a catalyst comprising at least one metallocene of the formula I <IMAGE> (M is zirconium or hafnium) and an aluminoxane. Polymers of high molecular weight are obtained in high yield.

Process for the preparation of an ethylene/propylene copolymer

The invention relates to a process for the preparation of a predominantly crystalline ethylene/propylene copolymer having less than 15 mol % of propylene units, which can be carried out in liquid propylene as the suspending agent, if metallocene catalyst components of the formulae I, II or III are employed and the partial pressures of ethylene and propylene have a specific ratio. ##STR1## By means of this process, it is possible to increase the possible uses of polymerization plants which work with liquid propylene.

Process for preparing organometallic fluorides

pi -system-containing organometallic fluorides are obtained by reacting a fluorine-free organometallic halide with a tin fluoride of the general formula R<4>3SnF, where the radicals R<4> are identical or different and are C1-C10-alkyl, C6-C14-aryl, C2-C10-alkenyl, C7-C20-arylalkyl or C7-C15-alkylaryl.

Organometallic compound

Metallocene compound

Process for the preparation of substituted indenes

The compounds of the formula I or Ia ##STR1## in which R 1 is alkyl, aryl, alkoxy, alkenyl, arylalkyl, alkylaryl, aryloxy, fluoroalkyl, halogenoaryl, alkynyl, trialkylsilyl or a heteroaromatic radical, R 2 , R 3 and R 4 , in addition to hydrogen, have the meanings given under R 1 and R 5 is hydrogen, alkyl, fluoroalkyl or alkenyl, can be obtained in a one-stage process by reaction of a compound II ##STR2## with (substituted) cyclopentadiene in the presence of a base. The compounds I and Ia are suitable as ligands for metallocene complexes which are used as catalysts in olefin polymerization.

Process for the preparation of a polypropylene molding composition

A propylene block copolymer having good flow properties and a very good low temperature impact strength is obtained in a high yield if a catalyst which consists of a chiral metallocene, containing a bridge, of the formula I ##STR1## and an aluminoxane is used for the polymerization of propylene and the comonomers. The polymerization is carried out in two stages, a crystalline propylene polymer in liquid monomers being prepared in the first stage and a copolymer in the gas phase being prepared in the second stage.

Process for the preparation of poly-1-olefins

Polyolefin moulding composition with broad melt range, process and use therefore

Method for preparing metallocene catalyst systems

This invention is generally directed toward a method for producing metallocene catalyst systems. Specifically, the method involves removing solid impurities from a solution of activated metallocene wherein activation has the effect of solubilizing the metallocene but not the impurities. The resulting catalyst system is higher in activity and produces polymer having excellent particle morphology with little or no reactor fouling.

Olefin polymerization catalyst, process for its preparation, and its use

A supported polymerization catalyst which is applicable in all polymerization processes is comprised of the reaction product of (A) a supported organoaluminum compound and (B) a metallocene catalyst component.

Transparent polypropylene film for candy twist wrapping

A transparent propylene polymer film, produced by coextrusion and coated on one or both sides, for candy twist wrapping, wherein the propylene polymer base layer additionally contains a low molecular hydrocarbon resin in an amount of 10 to 40% by weight, based on the total weight of propylene polymer and resin, the base layer has a modulus of elasticity of not less than 3,000 N/mm 2 , measured in both directions of molecular orientation, and each top layer contains a polydialkylsiloxane in an amount of 0.3 to 1.5% by weight, based on the weight of the top layer.

Process for the production of a biaxially highly oriented polypropylene film

A process for the production of a biaxially oriented propylene polymer film contains, in its single ply (or, if it is a multi-ply film, in its base ply) a low molecular weight resin, and the film has improved stretchability and other desirable physical properties, even though the propylene polymer of the sole or base ply is preferably a homopolymer. The n-heptane-insoluble fraction of the film has a chain isotacticity index, measured by means of 13 C-NMR spectroscopy, of at least 85 to 94%. The sole or base ply contains less than 10% by weight of resin. The film is stretched in such a way that the product of tensile strength in the longitudinal and transverse direction is greater than 50,000 (N/mm 2 ) 2 . The film is made by, among other steps, carrying out the orientation in the longitudinal and transverse directions such that the product of the longitudinal stretching ratio and the transverse stretching ratio is≧60.

Biaxially oriented polypropylene film having improved migration values

A biaxially oriented polypropylene film is described. The base ply of the film contains at least 90% by weight of a polypropylene prepared by means of a metallocene catalyst. This polypropylene is distinguished by a mean isotactic block length of greater than 40, an n-heptane soluble fraction of less than 1% and a ratio of the weight average molecular weight M w to the number average molecular weight M n of less than 4.

[UNK]

Process for the preparation of ethylene (co) polymers

Abstract Process for the preparation of an ethylene polymer The homopolymerization of ethylene or the copolymeriza-tion of ethylene with other 1-olefins is carried out using a catalyst which is composed of a trialkylaluminum and the over-all product of the reaction of a magnesium alcoholate, dissolved in an inert solvent, with a tetra-valent transition metal compound and an organoaluminum compound and optionally an electron donor. This gives a coarse-particle polymer having a high bulk density.

Metallocenes with arylsubstituted indenyl-derivatives as ligands, process for their preparation and their use as catalysts

A very active catalyst system for the polymerisation or copolymerisation of olefins consists of a co-catalyst, preferably an aluminoxane or a supported aluminoxane, and a metallocene of the formula I <IMAGE> in which, in the preferred form, M<1> denotes Zr or Hf, R<1> and R<2> denote halogen or alkyl, R<3> denotes alkyl, R<4> to R<12> denote alkyl or hydrogen and R<13> denotes a (substituted) alkylene or heteroatom bridge. The metallocenes, in particular the zirkonocenes, produce polymers of very high molecular weight in the industrially particularly interesting temperature range between 50 and 80 DEG C if the catalyst activities are high, and polymers of very high molecular weight, very high stereotacticity and high melting point in the case of prochiral monomers. Moreover, using supported catalyst systems, reactor coatings are avoided.

METHOD FOR PRODUCING POLYOLEFINS AND THEIR COPOLYMERISATS

METHOD FOR PRODUCING OPTICALLY ACTIVE POLYOLEFINES

METHOD FOR PRODUCING A SYNDIOTACTIC POLYOLEFIN

[UNK]

Metallocene compound

Catalytic systems for polymerisation processes, their production and application

This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst system of the invention provides for a supported metallocene catalyst and alumoxane activator which when utilized in a polymerization process substantially reduces the reactor fouling and sheeting.

Continuous process and device for the manufacture of a vinyl chloride polymer in aqueous suspension

ABSTRACT OF THE DISCLOSURE The process described is carried out in at least two reaction zones, plug flow of the polymerization mixture being maintained in all the reaction zones. In the first reaction zone, polymerization is carried to a conversion of not more than 10 % and, in the course thereof, the polymerization mixture is agitated suffi-ciently to establish the desired particle size morphology, preferably at a stirring energy per unit volume of 0.1 to 5 kWm-3. Particularly in the second reaction zone, the formation of polymer incrustations on the surfaces coming into contact with the polymerization mixture is prevented, preferably by ensuring that the polymerization mixture comes exclusively into contact with smooth, non-metallic surfaces. The device preferably comprises three reac-tors, all of which have a length/diameter ratio of at least 4, the first reactor standing in a vertical position and the other two reactors being in an approximately horizontal position. This makes it possible to manu-facture, over a long period, vinyl chloride polymers at good space-time yields and with a constant and good pattern of properties and a narrow particle size distri-bution.

Process for the manufacture of a mixed catalyst

The high activity rate of known polymerization catalysts on the basis of metal alcoholates can be considerably increased by after-treating these catalysts with acid halides of the 3rd or 4th main group or the 4th subgroup of the Periodic Table.

Process for the preparation of polyolefins

In the polymerization of propylene and other higher 1-olefins, polymers which have a high degree of isotacticity and a narrow distribution of molecular weight are obtained in the presence of a catalyst system composed of a zirconium compound which is stereo-rigid and chiral and a linear or cyclic aluminoxane. In addition, the catalyst system is exceptionally active.

1-olefin stereoblock polymer, and a process for its preparation

Stereoblock polymers of 1-olefins having a broad uni-, bi-, tri- or multimodal molecular weight distribution are obtained when a catalyst which comprises a chiral metallocene containing bridges and an alumoxane is used for the polymerization of the 1-olefins. The polymers are particularly highly suitable for the production of transparent films.

Process for the preparation of a polyolefin

Olefins of the formula R11-CH=CH-R12 (R11 and R12=H or C1-C14-alkyl) are polymerized in the presence of a catalyst comprising at least one metallocene of the formula I <IMAGE> (I) (M=zirconium or hafnium) and an aluminoxane, giving polymers of high molecular weight in high yield.

METHOD FOR PRODUCING 1-OLEFIN POLYMERS

Verfahren zur herstellung einer heterogenen metallocenkatalysatorkomponente

Metallocene (co)polymers, process for their preparation and their use as catalysts

An immobile (heterogeneous) metallocene catalyst component which can advantageously be used for olefin polymerization is obtained by homopolymerization of appropriately substituted (vinyl group-containing) metallocenes of group IVb of the periodic table or by copolymerization of such metallocenes with (di)vinyl-aromatic compounds.

Process for the production of polyolefins

Olefins polymn catalyst - consisting of titanium trichloride prod

Catalyst esp. for polymerisation of ethylene opt. with up to 10% wt. 3-6 C alpha-olefin using hydrogen as mol. wt. regulator consists of (I) the reaction prod. of (a) 0.1 - 10 moles chlorinated cpd. of trivalent Ti, pref. TiCl3, and (b) 1 mole (expressed as Ti) of the reaction prod. of a solid cpd. contg. a divalent metal e.g. Mg, Ca, Cr, Mn, Fe, Ni, Co, Cu, Zn or Cd, and a chlorinated cpd. of tetravalent Ti prepd. in the presence or absence of aluminium alcholates, and (Ii) a trialkylaluminium contg. 1-16, pref. 2-12 C atoms per alkyl gp. and/or the reaction prod. of a trialkylaluminium and/or alkylaluminium hydride contg. 1-16 pref. 2-12 C atoms per alkyl gp. with a 4-20 C diolefin, pref. isoprene.

Process for the preparation of polyolefins

Polyolefins with a molecular weight distribution M w /M n ≧3.0, which may be monomodal, bimodal or multimodal, can be obtained by polymerization or copolymerization of olefins with a catalyst system consisting of an aluminoxane and a transition metal component (metallocene), in which the transition metal component consists of at least one zirconocene of the formula I and at least one zirconocene of the formula Ia ##STR1## or alternatively of at least 2 zirconocenes of the formula I.

Process for the bulk polymerization of alkenylaromatic compounds

There is described a process for the homopolymerization or copolymerization in the bulk of alkenylaromatic compounds in a continuous flow agitation vessel. The feed of the monomer(s) is preheated and a controlled larger or smaller part of the preheated monomer feed is cooled, depending on the deviation of the temperature of the contents of the reaction vessel from the determined value. The inventive process ensures an improved constancy of the reaction temperature, and, consequently, of the molecular weight of the polymer obtained.

INSERT FOR EYE WASH BOTTLE

Flammhemmendes vlies mit bindefilamenten

Process for the transformation of water - sensitive ceramic powders into a flowable granulate

Light-detecting device

A novel light detecting device consists of a plate-like light- absorbing body and at least one optical waveguide connected thereto. Both parts of the light detecting device contain a fluorescent dye, whereby the irradiated light is converted into a fluorescent radiation. This radiation is passed by total reflection to a light- sensitive semiconductor element and measured there. The light detecting device is suitable as a light barrier, optical fibre rotary speed measuring device or UV detector. …<IMAGE>…

Self-standing prismatic bag for flowable material - has pouring aid formed by top projection of sleeve foil

The prismatic stand-up bag (1) is used for packing flowing materials. It comprises a sleeve part made of two superposed foils connected together along their two side longitudinal edges through longitudinal welding seams. A pouring aid is formed by part of the foil of the sleeve protruding on the top side. The top part can be formed by a top leaf connected to the foil of the sleeve by welded seams. USE/ADVANTAGE - The bag contains a flowing material. It can be easily emptied completely. After partial emptying it can still remain standing upright.

Polyurethane dispersions

Polyurethane dispersions prepared by free radical-initiated polymerisation of polyurethane macromonomers containing carboxyl, phosphonyl or sulphonyl groups and lateral vinyl groups and optionally terminal vinyl, hydroxyl, urethane, thiourethane and/or urea groups, are suitable for the production of coatings on substrates, as adhesives or as binders in printing inks.

Polyurethane dispersions

Polyurethane dispersions prepared by free radical-initiated polymerisation of polyurethane macromonomers containing carboxyl, phosphonyl or sulphonyl groups and terminal vinyl groups and optionally urethane, thiourethane or urea groups, where the terminal vinyl groups are not derived from hydroxyalkyl (meth)acrylates, are suitable for the production of coatings on substrates, as adhesives or as binders in printing inks.

Method for the manufacture of a heat exchange element

1. Process for the production of a heat-exchanger element which consists of a two-ply woven fabric with rigid spacer filaments, and which is sealed against fluid transfer media, and which has inlet and outlet lines for the fluid heat transfer media, characterized in that the two-ply woven fabric is brought into the desired shape, that it is then provided, on the upper side and on the underside, with a layer of curable sealing material, and that curing to bring about a rigid element is then carried out, and that upper and lower layer are bonded to one another, at the edges of the two-ply woven fabric, in a manner which is leakproof, and that inlet and outlet lines are attached.

Xerogels, process for their preparation and their use

Xerogels are manufactured from a soln. of water glass brought to pH ≤ 3 with an acid ion exchange resin or a mineral acid. The silicic acid obtained is polycondensed to a SiO2 gel by the addn. of a base. If mineral acid was used in the 1st step, the gel is washed free of electrolyte with H2O. Water is removed from the gel by extractive distillation with an organic solvent that forms an azeotrope that separates into 2 phases on cooling. The water content is reduced to ≤ 5 wt.%. The resulting gel is dried at below the critical temp. and below the critical pressure of the organic solvent used for extractive distillation. äU

Water soluble binder - comprises reaction prod. of poly:carboxylic acid, salt forming cpd., hydroxy gp. contg. polymer and/or epoxy cpds. (BR 16.10.79)

A water soluble, reactive binder comprises >=3 units of (A) halogen free polycarboxylic acid mixts., (B) a salt forming material chosen from alkali(ne earth) metal and quaternary ammonium salts, organic bases and/or NH3, (Cl) OH contg. polymers and/or (C2) epoxy cpds. The binder hardens at low temps. and has high mechanical strength and chemical and light resistance. The binder has good storage stability and is used as a lacquer esp. an electroimmersion lacquer for metals. The lacquer has good adhesion and high weather stability. The compsn. may also be used in sealants, mouldings, foams, insulation varnishes and street markings.

DERIVATIVES OF AMINO GROUPS OF 1,3-BI-SUBSTITUTED PROPANOL-2, METHOD FOR THE PRODUCTION THEREOF AND THEIR USE

Process for obtaining negative copies using a 1,2-quinone diazide material

Es wird ein Verfahren zur Herstellung von negativen Reliefkopien beschrieben, bei dem ein lichtempfindliches Material, das als lichtempfindliche Verbindung einen Ester oder ein Amid einer 1,2-Chinondiazidsulfonsäure oder -carbonsäure und einen Hexamethylolmelaminether enthält, bildmäßig belichtet, danach erwärmt, nach dem Abkühlen nochmals ohne Vorlage belichtet und dann mittels eines wäßrigalkalischen Entwicklers entwickelt wird. Das Verfahren erlaubt die Herstellung von negativen Kopien mit einem Material, das bei üblicher Verarbeitung positive Kopien liefert. A process for producing negative relief copies is described in which a light-sensitive material which contains an ester or an amide of a 1,2-quinonediazide sulfonic acid or carboxylic acid and a hexamethylol melamine ether as the light-sensitive compound is exposed imagewise, then heated, after cooling again exposed without original and then developed using an aqueous alkaline developer. The process allows negative copies to be made with a material that, in common processing, provides positive copies.

Aqueous, self-crosslinking polyurethanevinyl hybrid dispersions

Aqueous self-crosslinking binders comprising polyhydrazides and carbonyl-containing urethane-vinyl hybrid polymers and optionally conventional additives.

Process for the hydroformylation of olefinic unsaturated compounds

Hydroformylation of olefinically unsaturated compounds is carried out as follows. (a) The olefinic compounds are reacted in a heterogeneous reaction system with an aqueous solution containing water-soluble complexes of rhodium compounds and organic phosphorus (III) compounds as catalysts, at 0.4-10 MPa; and (b) the exhaust gas produced is subjected to a second reaction, in which residual olefinically unsaturated compounds still present in the gas are converted in a homogeneous reaction system in the presence of complex compound of Rh with organic P(III) compounds as catalysts at 15-40 MPa.

Aromatic co-polyamide(s), esp. for high-performance fibres prodn.

Aromatic copolyamides (I) with inherent viscosity (i.v.) at least 3.5 (esp. 4.5) dl/g (0.25% soln. in NMP), which are soluble in polyamide solvents, are claimed. (I) contain 40-65 mol.% units of formula (Ia), 5-55 mol.% units (Ib), 5-35 mol.% (Ic) and opt. 0-30 mol.% (Id), where R1 = unsubstd. arylene (at least 80 mol.% linked in para-, corresp. coaxial or parallel positions, and up to 20 mol.% linked in meta- or corresp. angled positions); R2 = unsubstd. arylene (para-, coaxially- or parallel-linked); R3 = a gp. which is different from R2, with formula (II) and/or (III) and/or (IV) and/or (V): (with Hal = halogen, R4 = 1-6C alkyl or alkoxy and/or Hal); X, Y = S, SO2, CO or O. Also claimed is a process for producing (I), by reacting diacid chlorides of formula ClOC-R1-COCl with diamines corresp. to units (Ib), (Ic) and (Id). Specifically X and Y = O; at least 90 (pref. 100) mol.% of all R1 gps. = 1,4-phenylene and up to 10 mol.% = 1,3-phenylene; R2 = 1,4-phenylene. Amts. of units are 45-55 mol.% (Ia), 35-45 mol.% (Ib), 5-25 mol.% (Ic) and 0 or 5-20 mol.% (Id). Also claimed are moulded prods. obtd. from (I), esp. fibres, films and coatings, partic. fibres with strength 90-250 (pref. above 200, esp. pref. 200-250) cN/tex, initial modulus (100% elongation) 25-60 N/tex, elongation at break 3-7% and loop strength above 80 (pref. 85-120) cN/tex. Also claimed is a process for producing fibres from (I), by spinning the fibres, applying an aq. suspension of a stable prepn. contg. particles of inert inorganic material as fibre lubricant, drying to form a layer of lubricant and stretching the treated fibre at above 300 (pref. 350-550) deg.C. Also claimed is the use of fibres of (I) for reinforcing plastics, esp. elastomers, and the use of films of (I) for producing membranes.

Fusion proteins, method for their production and their use

1. Claims for the Contracting States : BE, CH, DE, FR, GB, IT, LI, LU, NL, SE A fusion protein of the general formula Met - Xn - D' - Y - Z in which n is zero or 1, X is a sequence of 1 to 12 genetically codable amino acids, D' is a sequence of about 70 amino acids in the region of the sequence of amino acids 23 - 93 of the D-peptide in the trp operon of E. coli, Y denotes a sequence of one or more genetically codable amino acids which permits the following amino acid sequence Z to be cleaved off, and Z is a sequence of genetically codable amino acids. 1. Claims for the Contracting State : AT A process for the preparation of a fusion protein of the general formula (1) Met - Xn - D' - Y - Z in which n is zero or 1, X is a sequence of 1 to 12 genetically codable amino acids, D' is a sequence of about 70 amino acids in the region of the sequence of amino acids 23 - 93 of the D-peptide in the trp operon of E. coli, Y denotes a sequence of one or more genetically codable amino acids which permits the following amino acid sequence Z to be cleaved off, and Z is a sequence of genetically codable amino acids, characterized by expressing a gene structure which codes for these fusion proteins in a host cell, and separating the fusion protein.

Free-flowing aqueous dispersions with pearly lustre

The aqueous dispersions with a pearly lustre essentially consist of a fatty acid glycol ester as component conferring the pearly lustre, of two particular surfactant compounds, namely a betaine and a fatty alcohol alkoxylate, and water in a defined amount in each case. The aqueous dispersions with a pearly lustre are free-flowing and thus can easily be handled. They have a pronounced pearly lustre and can easily be incorporated into surfactant compositions, whereby the latter acquire the desired pearly lustre.