Assignee: Borealis A/S

Location: Lyngby, DK
No. of patents: 37

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Number	Title	Issue Date
6921799	Olefin polymerization process The invention relates to a process for the preparation of an olefin polymer comprising at least two polymerization stage in the presence of an olefin polymerization catalyst material, an olefin polymer produced by such process, and the use of such polymers for the p...	07/26/2005
6887939	Stabilizing agent The present invention relates to a stabilizing agent for polymers or copolymers which is a copolymer of ethylene or propylene (A) and a vinyl compound (B) having the formula: wherein X is O, NH...	05/03/2005
6875826	High melt strength polypropylene The present invention concerns a high melt strength propylene polymer or copolymer suitable for manufacturing foams and thermoformed product exhibiting a melt strength of at least 3 g and comprising a high molar mass portion and a low or medium molar mass portion. T...	04/05/2005
6730756	Catalyst and process for olefin polymerization Olefin polymerization may be catalysed by a wide range of catalytic materials. Described herein is a heterogeneous olefin polymerization catalyst comprising a porous paniculate support material having impregnated therein a metallocene catalyst the metal atom whereof...	05/04/2004
6683125	Talc containing polypropylene compositions The present invention concerns polymer compositions and a process for the preparation thereof. The compositions comprise a propylene polymer nucleated with a polymeric nucleating agent containing vinyl compound units, and 0.1 to 10% talc, calculated from ...	01/27/2004
6562914	Process for making propylene homo or copolymers A process for homo or copolymerizing propylene, wherein propylene is polymerized in the presence of a catalyst at an elevated temperature in a reaction medium in which a major part of the reaction medium is propylene and the polymerization is carried in a...	05/13/2003
6506858	Olefin polymerization catalyst material and process for its preparation A process for the preparation of a catalyst material and the resultant catalyst material. The process comprises the steps of: (a) treating a particulate support material with an alkylating agent; (b) contacting the alkylating agent treated support materia...	01/14/2003
6461574	Apparatus for the polymerization of olefin monomers An apparatus for the polymerization of olefin monomers comprising means for forming a fluid stream containing catalyst, means for continuously feeding the fluid stream into an elongated polymerization reactor having at least two successive chambers separa...	10/08/2002
6416860	Electric cable and a method and composition for the production thereof A semiconducting composition for the inner semiconducting layer of an electric cable, an electric cable incorporating the composition, and a method of producing a cross-linked inner semiconducting layer of an electric cable are disclosed. The semiconducti...	07/09/2002
6362356	Metallocene compounds for the polymerization of ethylenically unsaturated monomers The invention relates to metallocen compounds having η5 ligands comprising at least four fused rings and having a sum of fused rings in all of its η5 ligands being at least 6. Such compounds are for example {[1-(7,9-diphenylcy...	03/26/2002
6339136	Process for making propylene homo or copolymers A process for homo or copolymerizing propylene, wherein propylene is polymerized in the presence of a catalyst at an elevated temperature in a reaction medium, in which a major part is formed by propylene. The polymerization is carried in at least one slu...	01/15/2002
6325959	Use of cross-linked polyolefins material in pressure pipes Use of at least partly cross-linked polyolefin plastic, which is oriented biaxially, as material for pressure pipes, is described. The pressure pipe is produced by extrusion with subsequent axial and peripheral orientation of the pipe, the pipe being at l...	12/04/2001
6284849	Method of catalyst transitions in olefin polymerizations A method for transitioning between two different catalysts in olefin polymerizations, a first catalyst and a second catalyst, comprising the steps of: discontinuing the feed of the first catalyst into the polymerization reactor, and introducing the second...	09/04/2001
6277778	Heteroatom substituted metallocene compounds for olefin polymerization catalyst systems and methods for preparing them According to the invention a new catalyst precursor is obtained, in which alkoxy or siloxy substitution in the 2-position of 5-membered ring of indenyl compound has been carried out. Thereby a metallocene compound is achieved, in which an oxygen atom is d...	08/21/2001
6277908	Non-halogenated fire retardant resin composition and wires and cables coated therewith A flame retardant resin composition for electrical insulation and sheathing of wire and cables which has enhanced oil resistance and excellent processing characteristics, comprising (a) 100 parts by weight of a polyolefin polymer, (b) 50 to 200 parts by w...	08/21/2001
6268442	Process for the reduction of reactor fouling A process for the reduction of reactor fouling at radical initiated high pressure polymerisation of ethylene (co)polymers is described. The process is characterised in that an adhesion reducing silicon containing compound is added to the polymerisation re...	07/31/2001
6242543	Process for producing polyethylenes having a broad molecular weight distribution, and a catalyst system used thereby A process for the polymerization of ethylene and optionally ଱-olefins to form ethylene homopolymer or copolymers having a broad molecular weight distribution, comprising polymerization of 100-80 wt. % of ethylene and 0-20 wt. % of comonomer in the p...	06/05/2001
6225420	Procatalyst and process for the preparation of a multimodal ethylene polymer A procatalyst and a process for the preparation of a multimodal ethylene homopolymer or copolymer by gas-phase polymerisation is described. The procatalyst used in the process is prepared by: a) contacting the support, preferably silica with a halogenating age...	05/01/2001
6207607	Composition containing magnesium, titanium, halogen and an inner electron donor, its preparation and use for the polymerization of alpha-olefins Disclosed is the homogenous reaction at 40-200° C. of MgX12 -nR1 OH (where n=2.0-6.4) with TiX24 and a higher (C6 -C20) alkyl ester of a carboxylic acid, optionally in the prese...	03/27/2001
6187402	Multilayer pipe A multilayer pipe having improved resistance to rapid crack propagation is described.; The pipe consists of at least two layers of different propylene plastic materials, which are so selected and combined that the pipe has a resistance to rapid crack prop...	02/13/2001
6165387	Composition for electric cables A composition for electric cables is described. The composition comprises an ethylene copolymer which includes a (poly)alkylene glycol mono(meth)acrylate of formula (I) wherein R1 =H or CH3 ; R2 =H or CH3 ; n=1-...	12/26/2000
6143844	Catalyst for olefin polymerization and a method for the manufacture thereof Provided are heterogeneous catalysts for homo- and copolymerization of olefins as well as a method for preparing these catalysts, which comprise at least one metallocene compound of a Group 4A, 5A or 6A (Hubbard) transition metal on a solid inorganic supp...	11/07/2000
6084041	Process for making propylene homo or copolymers A process for homo or copolymerizing propylene, wherein propylene is polymerized in the presence of a catalyst at an elevated temperature in a reaction medium in which a major part of the reaction medium is propylene and the polymerization is carried in a...	07/04/2000
6080810	Semiconducting polymer composition and cable sheathing comprising the same A semiconducting, cross-linkable and silane-containing polymer composition is disclosed, as is a cable sheathing for an electric cable which, as semiconducting layer, includes the cross-linked polymer composition. The composition is based on ethylene and ...	06/27/2000
6063845	Composition for an electric cable A composition for an electric cable is described. The composition is characterized in that it comprises an ethylene plastic and a compound of the general formula (I) ##STR1## where nࣙ1, R1, R2 and R3, which are the ...	05/16/2000
6040260	Process for the preparation of repolymerized catalyst composition and a process for polymerizing ଱-olefins The present invention concerns prepolymerized catalyst composition for polymerization of ଲ-olefins, a process for the preparation thereof and a process for polymerization of ଲ-olefins. According to the polymerization process a procatalyst comp...	03/21/2000
6028146	Free radical grafting of monomers onto polypropylene resins A method of free radical grafting of monomers onto a polypropylene resin includes: (i) mixing the polypropylene resin with an allylepoxy compound, a styrenic compound and a peroxide as an initiator, (ii) heating the mixture to a temperature which is highe...	02/22/2000
5993977	Polymeric material and its use in multilayer products The invention relates to a multilayer product for the production of packaging, the product comprising a carrier web (1), on one face of which there is disposed a tight multilayer coating (2) which includes a moisture-proof layer (b) and a gas-tight layer ...	11/30/1999
5986021	Process for manufacturing LLDPE polymers Process for manufacturing ethylene copolymers by polymerizing ethylene and a minor amount of C3 -C6 alphaolefins in particle form in slurry reactor in the presence of an ethylene polymerizing catalyst. According to the invention the ...	11/16/1999
5973070	Polyolefin alloy with improved surface hardness and scratch resistance A polyolefin alloy and a process for making the same which alloy includes (A) 40% to 80% by weight of polypropylene material which may be a polypropylene homopolymer or a propylene copolymer with ethylene and/or butadiene, the polypropylene copolymer incl...	10/26/1999
5922269	Plastic pallet A method of manufacturing a plastic pallet having a deck and legs underneath the deck includes forming an extruded parison, while still hot, into an article having a pallet deck and integrated sheet legs along its longitudinal, transverse, or both sides. ...	07/13/1999
5919863	Plastic material for packaging The instant composition is a sealable and peelable polymer composition consisting essentially of a first ethylene copolymer grafted with a vinyl monomer and a second ethylene copolymer selected from ethylene/methylacrylate copolymers, ethylene/ethylacryla...	07/06/1999
5849844	Polyolefin-condensation polymer blend A process for the preparation of a plastics blend which contains a polyolefin-condensation polymer blend, in the first step of which process a crystalline polyolefin component and a low-crystallinity polyolefin component are functionalized in one process ...	12/15/1998
5845588	Plastic pallet A pallet fabricated made of a thermoplastic material is produced by joining together individually fabricated structural components, each individually thermoformed from an extruded plastic parison of a multilayer structure. The structural components includ...	12/08/1998
5767032	Catalyst for olefin polymerization and a method for the manufacture thereof Provided are heterogeneous catalysts for homo- and copolymerization of olefins as well as a method for preparing these catalysts, which comprise at least one metallocene compound of a Group 4A, 5A or 6A (Hubbard) transition metal on a solid inorganic supp...	06/16/1998
5733989	Prepolymerized catalyst composition, a process for the preparation thereof, and a process for polymerizing ଱-olefins The present invention concerns prepolymerized catalyst composition for polymerization of ଱-olefins, a process for the preparation thereof and a process for polymerization of ଱-olefins. According to the polymerization process a procatalyst comp...	03/31/1998
5474845	Melt-spun high-strength polyethylene fibre The invention concerns a high strength polyethylene fibre, which is prepared by melt spinning polyethylene having a high density through a spinnerette, by cooling the fibre coming out from the spinnerette and by stretching the fibre obtained at 50°-150°...	12/12/1995

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Assignee: Borealis A/S