Borealis Ag

Borealis Technology Oy

Neste Oy

Borealis Holding A/s

Optatech Corporation

Borealis A/s

Abu Dhabi Polymers Co. Ltd (borouge) Llc.

Abu Dhabi Polymers Company Limited

Torvald Vestberg

Ismo Lehtiniemi

Pauli Leskinen

Timo Leinonen

Peter Denifl

Pirjo Jääskeläinen

Kauno Alastalo

Bo Malm

Markku Sainio

Lars-ANGke Mattsson

Jingbo Wang

Markus Gahleitner

Klaus Bernreitner

Per-Ola Hagstrand

Villgot Englund

Ulf Nilsson

Hanneli Seppanen

Markku Vahteri

Ville Virkkunen

Christelle Grein

Dietrich Gloger

Jukka Laakso

Esa Korhonen

Johan Defoer

Michiel Bergstra

Olli Tuominen

Päivi Pitkänen

Thomas Horill

John Severn

Anssi Haikarainen

Anders E Nymark

Marja Ora

Kalle Hanhi

Jan-Erik Sterholm

Niraj Dixit

Viveca Lonnberg

Hanna-Leena Rönkkö

Pirjo J&auml;&auml;skel&auml;inen

Tarja M&auml;kel&auml;

Harri Jukarainen

Tommi Vainio

Vijay Francis

Anna Fait

Gurusamy Sakkaraiyappan

Klaus Bernreiter

Nora Mäkelä-vaarne

Pirjo JÄÄSKELÄINEN

Päivi PITKÄNEN

The present invention relates to a process for producing a prepolymerized solid Ziegler-Natta catalyst in batch mode, a prepolymerized solid Ziegler-Natta catalyst, a process for producing a propylene polymer using said prepolymerized solid Ziegler-Natta catalyst, a prepolymerized solid Ziegler-Natta catalyst obtained by a process as well as the use of the prepolymerized solid Ziegler-Natta catalyst in a process for producing a propylene polymer.

Process for producing a prepolymerized solid Ziegler-Natta catalyst

Catalyst composition comprising a phthalate-free electron donor, which is highly effective during polymerisation in the presence of a polymeric nucleating agent, and its use and a process for its preparation.

Catalyst component for the preparation of nucleated polyolefins

The present invention relates to a solid, particulate catalyst component having an mean particle size range of 5 to 200 &#x3bc;m and comprising a compound of a Group 2 metal, a compound of a transition metal of Group 4 to 6, and at least two internal electron donors being different to each other and being non-phthalic organic compounds selected from (di)esters of non-phthalic carboxylic (di)acids, 1,3-diethers and di-esters of 1,3-diol compounds and derivatives thereof, and wherein the solid particulate catalyst component is free of any external support material. The invention relates also to the preparation of the catalyst component and a polymerization process for producing propylene polymers.

Catalyst component

Process for producing of a capacitor film comprising the steps of (a) polymerizing propylene in the presence of a catalyst comprising a solid catalyst system obtaining a polypropylene, (b) subjecting said polypropylene to a film forming process obtaining a capacitor film, wherein during the polymerization step (a) said catalyst comprising the solid catalyst system fragments into nanosized catalyst fragments being distributed in said polypropylene, said solid catalyst system comprises a transition metal, a metal which is selected from one of the groups 1 to 3 of the periodic table (IUPAC), and an internal electron donor.

Process for the manufacture of a capacitor film

Catalyst composition comprising a phthalate-free electron donor, which is highly effective during polymerization in the presence of a polymeric nucleating agent, and its use and a process for its preparation.

Nucleated polypropylene composition comprising at least one propylene homopolymer wherein the nucleated polypropylene composition and/or the propylene homopolymer can be free of phthalic acid esters as well as their respective decomposition products.

Nucleated polypropylene composition

Propylene random copolymers with low randomness and being free of from catalyst originating phthalates.

Propylene random copolymer

Polypropylene copolymer for biaxially oriented polypropylene (BOPP) with low isotacticity, high melting temperature and low comonomer content.

Polymer composition with high XS, high Tm suitable for BOPP processing

A process for polymerizing propylene in the presence of a polymerization catalyst by polymerizing propylene with a comonomer selected from the group of ethylene and C4-C10 alpha-olefins in two polymerization stages where the comonomer is present in at least one of the polymerization stages. The first polymerization stage is conducted in a loop reactor and the second polymerization stage in a gas phase reactor. The polymer produced in first polymerization stage has a higher melt flow rate and a lower content of comonomer units than the final polymer mixture. The process can be operated with a high throughput and catalyst productivity. The polymers are useful for making films.

Two-stage process for producing polypropylene compositions

High purity heterophasic polypropylene copolymers comprising (A) 73 to 98 wt % of a propylene homo- or copolymer matrix with an MFRin accordance with ISO 1133 (230&#xb0; C., 2.16 kg load) of &#x2267;45 g/10 min and (B) 2 to 27 wt % of an elastomeric copolymer, comprising propylene in an amount of at least 50 wt % of component (B) and at least ethylene and/or one other Cto Calpha olefin in an amount of up to 50 wt % of component (B), the heterophasic polypropylene copolymers being obtainable by a multistage polymerization process in the presence of a catalyst system comprising (i) a Ziegler-Natta procatalyst which contains a trans-esterification product of a lower alcohol and a phthalic ester and (ii) optionally an organometallic cocatalyst and (iii) an external donor represented by formula (I) Si(OCHCH)(NRR) wherein Rand Rcan be the same or different a represent a hydrocarbon group having 1 to 12 carbon atoms, their production and use.

High purity heterophasic propylene copolymers

The present invention relates to a process for the preparation of a propylene copolymer P1 having ethylene-derived comonomer units, which comprises the following steps: (i) introducing propylene, ethylene, and hydrogen into a polymerisation reactor R1, wherein the ethylene is fed to the polymerisation reactor R1 in a periodically varying amount, (ii) preparing the propylene copolymer in the polymerisation reactor R1 in the presence of a catalyst.

Preparation of propylene copolymer with dynamically operated reactor

The invention is directed to a process for the manufacture of heterophasic propylene copolymer compositions comprising the steps of forming a propylene polymer matrix in at least one slurry reactor and optionally in at least one gas phase reactor and subsequently forming in at least one gas phase reactor an elastomeric copolymer by copolymerizing propylene with ethylene and/or with another alpha-olefin in the presence of said matrix, wherein the polymerization is carried out in the presence of a catalyst system comprising a catalyst in form of solid particles, said particles (a) have a surface area of less than 20 m/g, (b) comprise a transition metal compound of groups 4 to 10 of the periodic table or a compound of actinide or lanthanide, (c) comprise a metal compound of groups 1 to 3 of the periodic table, and (d) comprise inclusions not comprising catalytically active sites.

Process for the manufacture of heterophasic propylene copolymer

The invention is directed an alpha-olefin homo- or copolymer composition comprising at least one (i) alpha-olefin homo- or copolymer component, wherein the alpha-olefin homo- or copolymer composition comprises a decreased amount of C6-C15-oligomers.

Alpha-olefin homo-or copolymer compositions

A process for producing at least two different propylene polymer grades, in which process the isotacticity of the polymer is changed while keeping the melt flow rate of the polymer at a predetermined level during a transition of production from a first polymer grade to a second. The process is carried out in a polymerization arrangement comprising at least one polymerization reactor, where propylene is polymerized, optionally with comonomers, under polymerization conditions in the presence of hydrogen as a molecular weight controlling agent and a Ziegler-Natta catalyst system. The catalyst system comprises a catalyst component and an external donor. During a transition of production from the first polymer grade to the second, the external donor is changed, but the hydrogen feed is kept at a predetermined level.

Process for producing olefin polymers

This invention relates to a process for the production of a polymer film or fibre wherein a polymer composition comprising a propylene homo- or copolymer is formed into a film or fibre, and wherein said propylene homo or copolymer is produced in a process which comprises the polymerization of propylene monomers or propylene monomers and one or more types of comonomers in the presence of a high yield Ziegler-Natta olefin polymerization catalyst, which catalyst comprises a component in the form of particles having a predetermined size range which has been produced in a process comprising: a) preparing a solution of a complex of a Group 2 metal and an electron donor by reacting a compound of said material with said electron donor or a precursor thereof in an organic liquid reaction medium, b) reacting said complex in solution with a compound of a transition metal to procedure an emulsion the dispersed phase of which containing more than 50 mol % of the Group 2 metal in said complex, c) maintaining the particles of said dispersed phase within the average size range of 5 to 200 microns by agitation in the presence of an emulsion stabilizer and d) solidifying said particles, and recovering, optionally washing said particles to obtain said catalyst component. The invention further relates to polpropylene products obtainable by this process and to the use of polypropylene products in the production of films and fibres.

Process for the production of polypropylene using high yield Ziegler-Natta catalysts

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Porvoo, Finland

Torvald Vestberg