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6335405 |
Catalysts for olefin polymer production and process for producing olefin polymer
Catalysts for olefin polymerization comprising (a) a compound of a transition metal of Groups 8 to 10 of the Periodic Table, (b) clay, a clay mineral or an ion-exchanging layered compound, (c) a...
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6329454 |
Filled propylene polymer composition
Disclosed are propylene polymer compositions comprising a polypropylene, an interpolymer prepared from a metallocene catalyst, and a filler. Said propylene polymer compositions have improved...
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6329541 |
Organo omega-alkenyl cyclopentacarbyl silane-bridged metallocene compounds
An (organo) ((omega-alkenyl) cyclopentacarbyl) (silane-bridged) metallocene compound is provided. Polymerization processes therewith are also provided.
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6326443 |
Process for preparing ethylene polymer and catalyst used therefor
A polymerization catalyst which exhibits a high activity and a good hydrogen response and thus is suitable for the production of an ethylene polymer having a wide molecular weight range can be...
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6320003 |
Method for producing a polyolefin
A method for producing a polyolefin in the presence of a catalyst comprising a transition metal compound and an organometallic compound, wherein a catalyst system is used which comprises (A) a...
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6316549 |
Ethylene polymer fiber made from ethylene polymer blends
Fibers made from formulated ethylene polymer compositions are disclosed. The ethylene polymer compositions have at least one homogeneously branched linear ethylene/α-olefin interpolymer and at...
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6313227 |
Propylene-ethylene block copolymer, resin composition, and blow-molded article
Provided are a propylene-ethylene block copolymer having MFR of from 0.01 to 1.0 g/10 min and comprised of (A) from 85 to 97% by weight a 25° C. xylene-insoluble fraction and (B) from 3 to 15% by...
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6313239 |
Olefin polymerization with group 4 metal-containing organosilicon dendrimers
Group 4 metal-containing organosilicon dendrimers are described. Also described are methods for synthesizing the dendrimers. The dendrimers can be useful in several applications including as olefin...
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6310167 |
Ethylene homopolymer and its molded article
Provided are an ethylene homopolymer having well-balanced properties of good heat resistance, good heat-sealability and good moldability, and its molded articles. The ethylene homopolymer is...
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6306986 |
Polymerization of olefins
Certain alkylhaloaluminoxanes and other alkylhaloaluminum compounds, when used as cocatalysts for the polymerization of olefins with complexes of transition metals and neutral bidentate ligands...
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6303717 |
Metal catalyzed synthesis of hyperbranched ethylene and/or α-olefin polymers
Oily hyperbranched polymers derived from ethylene, propylene, butene and/or a C 5 -C 24 α-olefin, and a method for their synthesis, are disclosed. The polymers have non-regular microstructures...
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6303720 |
Olefin polymerization catalysts containing group 8-10 transition metals, processes employing such catalysts and polymers obtained therefrom
Methods for preparing olefin polymers, and catalysts for preparing olefin polymers are disclosed. The polymers can be prepared by contacting the corresponding monomers with a Group 8-10 transition...
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6300446 |
Fluorine-containing copolymer and composition thereof
A fluorine-containing copolymer characterized by comprising tetrafluoroethylene, vinyl fluoride or vinyl chloride and a polymerizable compound other than the above, and a vulcanizable composition...
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6300438 |
Hafnium transition metal catalyst compounds, catalyst systems and their use in a polymerization process
The present invention relates to a Group 15 containing hafnium catalyst compound, a catalyst system and a supported catalyst system thereof and to a process for polymerizing olefin(s) utilizing them.
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6300435 |
Iron olefin copolymerization catalyst
Olefin Co- or homopolymers having a good molecular weight and short chain branching may be prepared in the presence of Group 8, 9 or 10 phosphinimine complex other than nickel.
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6300434 |
Propylene-ethylene copolymers made from three different constituents
Propylene-ethylene copolymers obtainable by three-step polymerization from the gas phase in an agitated fixed bed by means of a Ziegler-Natta catalyst system which, in addition to a...
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6300439 |
Group 15 containing transition metal catalyst compounds, catalyst systems and their use in a polymerization process
The present invention relates to a Group 15 containing metal catalyst compound having a substituted hydrocarbon leaving group, a catalyst system and a supported catalyst system thereof and to a...
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6294626 |
Olefin polymerization catalysts containing modified boraaryl ligands
A single-site olefin polymerization catalyst is described. The catalyst comprises an activator and an organometallic compound that includes a Group 3 to 10 transition or lanthanide metal, M, and a...
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6281303 |
Olefin oligomerization and polymerization catalysts
Disclosed herein are compounds and processes useful for the oligomerization and polymerization of olefins. Transition metal catalyst complexes of groups 7 through 10 with tridentate ligands are...
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6281320 |
Use of chelatable phenols with metallocene- aluminoxane catalyst systems
This invention comprises a metallocene catalyst system for the production of high molecular weight polyolefins, particularly polyethylene and higher poly-alpha olefins, and copolymers of ethylene...
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6277934 |
Organic aluminoxy compound and catalyst for producing polymer
An organic aluminoxy compound which shows 27 Al nuclear magnetic resonance spectrum ( 27 Al-NMR spectrum) having an A 1 /A 2 ratio of at most 0.1, wherein A 1 is area of a region encompassed...
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6277931 |
Dual reactor ethylene polymerization process
A dual reactor process for the solution and (co)polymerization of ethylene uses two different types of catalysts in the two reactors. A catalyst having a phosphinimine ligand is used in the first...
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6274691 |
Method of producing inflation film and said film
A method of producing an inflation film, which comprises processing an ethylene polymer or a resin composition containing said ethylene polymer in a die gap at a melting temperature of not more...
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6271165 |
Catalyst component dispersion comprising an ionic compound and solid addition polymerization catalysts containing the same
This invention relates to supported and nonsupported catalyst components comprising (a) an ionic compound comprising (a)(1) a cation and (a)(2) an anion having up to 100 nonhydrogen atoms and the...
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6268448 |
Iminophosphonamide complexes for olefin
The present invention relates to the use of complexes of transition metals having a ligand containing a phosphorus or arsenic atom bound to the transition metal through an oxygen atom, or an amido...
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6265513 |
Polyolefin
Polyolefin wherein A) the melt indices of Fractions 1, 4 and 6 of the polyolefin do not vary by more than 20% relative to the mean of Fractions 1, 4 and 6; and/or B) the percent crystallinity...
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6265500 |
Production of polyethylene having improved mechanical properties
A process for producing a polyethylene resin having improved mechanical properties, the process comprising polymerising ethylene in the presence of a chromium-based catalyst to make polyethylene...
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6258904 |
Unbridged monocyclopentadienyl metal complex catalyst and a process for polyolefin production
There is provided a catalyst containing a transition metal precursor having the formula (C 5 R 1 5 )MX 3 , an alcohol, a substituted bulky phenol, an aluminoxane, and optionally a support or spray...
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6239299 |
Metallocenes with ferrocenyl-substituted bridges used in olefin polymerization
##STR1## The invention relates to metallocenes of formula (I), in which M is a metal from the Ti, Zr, Hf, V, Nb, Ta group or an element from the lanthanide group, X 1 and X 2 stand for an alkyl-,...
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6235822 |
Gaskets made from olefin polymers
Gaskets comprising either at least one homogeneously branched ethylene polymer or at least one elastic substantially linear ethylene polymer, at least one ethylene/carboxylic acid interpolymer; and...
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6232483 |
Polymerization of ethylene
Certain nickel [II] complexes of selected ortho-phosphine substituted arylsulfonamides or selected phosphine containing alkylsulfonamides catalyze the polymerization of ethylene. The polymers...
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6228958 |
Azaborolinyl metal complexes as olefin polymerization catalysts
Disclosed is a catalyst having the general formula ##STR1## where L is a ligand having the formula ##STR2## L' is L, Cp, Cp*, indenyl, fluorenyl, NR 2 , OR, or halogen, L can be bridged to L; X is...
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6225426 |
Process for producing polyolefin elastomer employing a metallocene catalyst
A liquid phase polymerization process is provided for producing a polyolefin elastomer, e.g., one derived from ethylene, another α-olefin such as propylene and optionally, a diene, employing a...
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6225424 |
Polyethylene resin as a material of a container for a high purity chemical, and a container for a high purity chemical made thereof
This invention aims at providing a polyethylene resin suitably used as a material of the container for a high purity chemical, which permits substantially no transference of fine particles and...
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6221992 |
Elastomeric copolymers of ethylene with alpha-olefins and process for their preparation
Amorphous copolymers of ethylene with propylene, and optionally with minor amounts of polyenes, have the following characteristics: (A) the % content by mole of propylene in the copolymer (%P)...
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6221801 |
Catalyst component for the polymerization of olefins, process for its manufacture and process for the polymerization of olefins in the presence of the said catalyst component
The present invention relates to a solid catalyst component for the polymerization of olefins, making it possible to obtain polymers or copolymers exhibiting a high Mz/Mw, generally higher than 3,...
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6221985 |
Solution polymerization of ethylene
A medium pressure process for the solution polymerization of ethylene at a temperature of from 80° C. to 250° C. in the presence of a catalyst system comprising (1) a catalyst component which is...
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6221981 |
Method for making and using a supported metallcene catalyst system
Methods are disclosed for preparing a highly active solid metallocene-containing catalyst system and its use in the polymerization of olefins. The catalyst system is prepared by creating a catalyst...
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6218487 |
Process for polymerizing olefins
A process for polymerizing olefins by bringing olefins into contact with a transition metal catalyst and a cocatalyst, characterized in that the cocatalyst is a compound in accordance with formula ...
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6214960 |
Shaped products manufactured from composition consisting essentially of ethylene homopolymer
An ethylene homopolymer having a density of from about 0.956 to about 0.970 g/cm 3 and a high load melt index (190° C. and 21.6 kg) of from about 7 to about 21 g/10 min. A continuous...
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6214950 |
Process for preparation of polyolefin using an olefin polymerization catalyst
A process for preparation of polyolefins using an olefin polymerization catalyst comprising (A) a solid catalyst component and (B) an organometallic compound component. The solid catalyst component...
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6214761 |
Iron catalyst for the polymerization of olefins
Catalysts based on iron complexes of 2,6-pyridinecarboxaldehydebis(imine) and 2,6-diacylpyridine-bis(imine) tridentate ligands are provided, which are particularly suitable for the polymerization...
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6204349 |
Pipe made of polyethylene resin
A pipe made of a polyethylene resin which is a linear polyethylene having the following physical properties (1) to (4): (1) a melt flow rate of 0.02 to 0.2 g/10 min, (2) a flow ratio of 50 or...
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6201078 |
Ethylene polymer and processes for obtaining it
Ethylene polymer having a die swell ratio (R B ) of at least 1.4, a resistance to crazing under stress (ESCR) of at least 55 h and a melt index (MI 5 ) of at least 0.2 g/10 min. Processes for...
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6197901 |
Preparation of homo- and copolymers of alk-1-enes
Polyalk-1-enes are prepared by polymerization of alk-1-enes with the aid of the compound bis(cyclopentadienyl)-chromium(II) ##STR1## in which the cyclopentadienyl rings may carry inert organic...
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6197900 |
Preparation of multiphase homo- or copolymers of C2-C10-alk-1-enes in one reaction zone
Multiphase homo- or copolymers of C 2 -C 10 -alk-1-enes are prepared by a process in which polymerization is effected in the presence of two different catalyst systems in one reaction zone, one...
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6197899 |
Olefin polymerization
A process is disclosed for the particle form polymerization of olefins. The process employs a titanium-containing having hydrocarbon soluble titanium components. The resulting catalyst is...
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6197887 |
Compositions having particular utility as stretch wrap cling film
A novel composition is disclosed comprising about 85 to about 99 weight percent based on the composition of a polymeric ethylenic containing component having a density no greater than 0.94 g/cc,...
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6194527 |
Process for making polyolefins
A two-step olefin polymerization process is disclosed. A single-site catalyst precursor reacts with a boron-containing activator and a first olefin substantially in the absence of an alumoxane to...
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6194533 |
Liner film for bulk container and container liner
Disclosed is a liner film for bulk container, which comprises a polyethylene (A) prepared by the use of a single site olefin polymerization catalyst such as a metallocene catalyst, said...
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