Abstract:
Process for the polymerization of butene-1 carried out in the presence of a catalyst comprising (a) a solid catalyst component comprising Mg, Ti and an electron donor compound of the following formula (I), In which the R groups equal to or different from each other, are C 1 -C 15 hydrocarbon groups, the R 1 -R 2 groups, equal to or different from each other, are hydrogen, halogen or C 1 -C 15 hydrocarbon groups, optionally containing an heteroatom selected from halogen, P, S, N and Si, n and m are integer from 0 to 3 with the proviso that at least one of them is different from 0; (b) An aluminium alkyl cocatalyst and (c) an external electron donor
Abstract:
Catalyst component for the polymerization of olefins comprising Mg, Ti and an electron donor compound of the following formula (I) in which R1 groups are selected from C 1 -C 15 hydrocarbon groups, R 8 groups, equal or different to each other, are selected from hydrogen, halogen and C 1 -C 15 hydrocarbon groups, optionally containing an heteroatom selected from halogen, O, P, S, N and Si and L is a divalent hydrocarbon group optionally containing heteroatoms selected from halogen, O, P, S, N and Si.
Abstract:
A catalyst system comprising the product obtained by contacting (a) a solid catalyst component containing Mg, Ti, halogen and at least an electron donor compound selected from phenylene aromatic diesters of a specific formula (b) an alkylaluminum cocatalystand (c) an ester of formula R'OOC-(CR" 2 ) m -COOR' in which m is an integer from 2 to 7, the R' groups, equal to or different from each other, are C 1 -C 10 alkyl groups and the R" groups, independently, are hydrogen or C 1 -C 15 hydrocarbon groups.
Abstract:
A porous solidcatalyst component comprising a magnesium halide, a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds one of which being selected from 1,3-diethers and the other being selected from succinates, characterized by the fact that the molar ratio ID/Ti is from 0.30 to 0.90, where ID is the total molar amount of succinate and 1,3-diether, the molar ratio of the 1,3-diether donor tothe succinate donor is higher than, or equal to, 0.60.
Abstract translation:一种多孔固体催化剂组分,其包含卤化镁,具有至少一个Ti-卤素键的钛化合物和至少两种电子给体化合物,其中一种电子给体化合物选自1,3-二醚,另一种选自琥珀酸酯,其特征在于, ID / Ti的摩尔比为0.30至0.90,其中ID是琥珀酸酯和1,3-二醚的总摩尔量,1,3-二醚供体与琥珀酸供体的摩尔比高于或等于 ,0.60。
Abstract:
A catalyst system comprising the product obtained by contacting (a) a solid catalyst component containing Mg, Ti, halogen and at least an electron donor compound selected from diolesters of a specific formula (b) an alkylaluminum cocatalyst and (c) an ester of formula R'OOC-(CR" 2 ) m -COOR' in which m is an integer from 2 to 8, the R' groups, equal to or different from each other, are C1-C10 alkyl groups and the R" groups, independently, are hydrogen or C1 -C15 hydrocarbon groups.
Abstract:
A catalyst component comprising Ti, Mg, Al, Cl, and optionally ORI groups in which RI is a C1-C20 hydrocarbon group, optionally containing heteroatoms, up to an amount such as to give a molar ORI /Ti ratio lower than 0.5, characterized by the fact that substantially all the titanium atoms are in valence state of 4, that the porosity (PF), measured by the mercury method and due to pores with radius equal to or lower than 1μm, is at least 0.3 cm3/g, and by the fact that the Cl/Ti molar ratio is lower than 29. The said catalysts are characterized by high morphological stability under the low molecular weight ethylene polymerization conditions while at the same time maintaining characteristics of high activity.