Abstract:
A process for the preparation of a propylene random copolymer, wherein propylene is polymerised with ethylene and/or a C4-C20 alpha-olefin in the presence of a catalyst system comprising solid catalyst particles, wherein the solid catalyst particles (a) have a specific surface area of less than 20 m 2 /g, (b) comprise a transition metal compound which is selected from one of the groups 4 to 10 of the periodic table or a compound of actinide or lanthanide,10 (c) comprise a metal compound which is selected from one of the groups 1 to 3 of the periodic table, and (d) comprise inclusions not having catalytically active sites.
Abstract:
Process for the preparation of a catalyst being in the form of solid particles comprising the steps of °preparing a solution of a complex of a metal which is selected from one of the groups 1 to 3 of the periodic table (IUPAC) and an electron donor by reacting a compound of said metal with said electron donorin an organic liquid reaction medium; °adding to said solution solid material obtaining a suspension, said solid material -does not comprise catalytically active sites, -has a specific surface area below 500 m2/g, and -has a mean particle size below 200 nm; °combining said suspension at a temperature of at least 50°C with at least one transition metal compound resulting in a precipitation of said catalyst being in the form of a solid particle, wherein said transition metal compound is selected from one of the groups 4 to 10 of the periodic table (IUPAC) or a compound of actinide or lanthanide; and °optionally separating said catalyst; said catalyst being in the form of solid particles, which -have a specific surface area of less than 20 m2/g, and -contain said solid material.
Abstract:
The present invention relates to a propylene random copolymer, comprising comonomers selected from the group consisting of ethylene, C 4 to C 20 alpha-olefins, and any combination thereof, wherein the propylene random copolymer (a) has a comonomer content of at least 3.5 wt.-%, based on the weight of the propylene random copolymer, (b) has a randomness of at least 30 %, and (c) is prepared in the presence of a catalyst system comprising solid catalyst particles, wherein the solid catalyst particles (cl) have a specific surface area of less than 20 m 2 /g, (c2) comprise a transition metal compound which is selected from one of the groups 4 to 10 of the periodic table or a compound of actinide or lanthanide, (c3) comprise a metal compound which is selected from one of the groups 1 to 3 of the periodic table, and (c4) comprise inclusions not having catalytically active sites.
Abstract:
Catalyst in form of solid particles, wherein the particles - have a specific surface area of less than 20 m 2 /g, comprise a transition metal compound which is selected from one of the groups 4 to 10 of the periodic table (IUPAC) or a compound of actinide or lanthanide, comprise a metal compound which is selected from one of the groups 1 to 3 of the periodic table (IUPAC), and - comprise solid material, wherein the solid material • does not comprise catalytically active sites, • has a specific surface area below 500 m 2 /g, and • has a mean particle size below 100.
Abstract:
The invention refers to a process for preparing a Group 2 metal/transition metal olefin polymerization catalyst component in particulate form having an improved polymerisation properties due to the addition of a phosphorous compound during catalyst component preparation and the use thereof in a process for polymerising olefins.
Abstract:
The invention refers to a process for preparing a Group 2 metal/transition metal olefin polymerization catalyst component in particulate form having improved polymerization properties due to the use of H 2 during catalyst component preparation and the use of such catalyst components in a process for polymerizing olefins.
Abstract:
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 α-olefm 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 2 /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.
Abstract:
The invention refers to a process for preparing a Group 2 metal/transition metal olefin polymerisation catalyst component in particulate form free of conventional phthalate electron donors and the use thereof in a process for polymerising olefins.
Abstract:
The invention refers to a process for preparing a Group 2 metal/transition metal olefin polymerisation catalyst component in particulate form for polymerising olefins, especially ethylene or propylene or comonomers thereof.
Abstract:
Process for the preparation of a catalyst being in the form of solid particles comprising the steps of •preparing a solution of a complex of a metal which is selected from one of the groups 1 to 3 of the periodic table (IUPAC) and an electron donor by reacting a compound of said metal with said electron donorin an organic liquid reaction medium; •adding to said solution solid material obtaining a suspension, said solid material -does not comprise catalytically active sites, -has a specific surface area below 500 m 2 /g, and -has a mean particle size below 200 nm; •combining said suspension at a temperature of at least 50°C with at least one transition metal compound resulting in a precipitation of said catalyst being in the form of a solid particle, wherein said transition metal compound is selected from one of the groups 4 to 10 of the periodic table (IUPAC) or a compound of actinide or lanthanide; and •optionally separating said catalyst; said catalyst being in the form of solid particles, which -have a specific surface area of less than 20 m 2 /g, and -contain said solid material.