Abstract:
Catalyst components component for the (co)polymerization of olefins CH 2 =CHR, in which R is a hydrocarbyl radical with 1-12 carbon atoms, optionally in mixture with ethylene, comprising Ti, Mg, Zn, CI, and an electron donor compound characterized by the fact that more than 50% of the titanium atoms are in the +4 valence state, and that the amount of Zn ranges from 0.1 to 4% by weight based on then total weight of said solid catalyst component.
Abstract:
Catalyst component for the polymerization of olefins comprising Mg, Ti and an electron donor compound of the following formula (I), in which R2-R8 groups, equal or different to each other, are selected from hydrogen, halogen and C1 -C15 hydrocarbon groups, optionally containing an heteroatom selected from halogen, O, P, S, N, and Si and R9 groups are selected from C1 -C15 hydrocarbon groups optionally containing an heteroatom 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,至少具有Ti-卤素键的钛化合物和至少两种电子给体化合物,其中一种选自1,3-二醚,另一种选自琥珀酸盐,其特征在于: ID / Ti的摩尔比为0.30〜0.90,其中ID是琥珀酸盐和1,3-二醚的总摩尔量,1,3-二醚供体与琥珀酸盐供体的摩尔比高于或等于 ,0.60。
Abstract:
A solid catalyst component for olefin polymerization, and in particular for the preparation of LLDPE, comprising Mg, Ti, halogen and an electron donor compound (ID) belonging to cyclic ethers having 3-6 carbon atoms, characterized by having the molar ratio Mg/Ti higher than 5, the molar ratio Mg/ID lower than 3, and by a specific X-ray diffraction spectrum.
Abstract:
Catalyst component comprising Mg, Ti, and halogen atoms, and is characterized in that (a) the Ti atoms are present in an amount higher than 4% based on the total weight of the said catalyst component, (b) the amount of Mg and Ti atoms is such that the Mg/Ti molar ratio is higher than 2 and (c) by a X-ray diffraction spectrum, in which, in the range of 2θ diffraction angles between 47° and 52°, at least two diffraction lines are present at diffraction angles 2θ of 48.3 ± 0.2°, and 50.0 ± 0.2°, the most intense diffraction lines being the one at 2θ of 50.0 ± 0.2°, the intensity of the other diffraction line being equal to or lower than the intensity of the most intense diffraction line.
Abstract:
A process for the preparation of propylene polymer compositions carried out in the presence of a catalyst system comprising (a) a solid catalyst component having average particle size ranging from 15 to 80 μm 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 present in an amount from 50 to 90% by mol with respect to the total amount of donors and selected from succinates and the other being selected from 1,3 diethers, (b) an aluminum alkyl and optionally (c) an external electron donor compound, and comprising the following steps: (i) contacting the catalyst components (a), (b) and optionally (c); (ii) pre -polymerizing up to forming amounts of polymer from about 0.1 up to about 1000 g per gram of solid catalyst component (a); (iii)polymerizing propylene producing a propylene (co)polymer being for at least 85% by weight of insoluble in xylene at 25°C and (iv)in a successive step, carried out in gas-phase, polymerizing mixtures of ethylene with α-olefϊns CH 2 =CHR in which R is a hydrocarbon radical having 1-10 carbon atoms, to produce the said ethylene copolymer.
Abstract:
Butene-1 (co)polymers characterized by the following properties: content of butene-1 units in the form of isotactic pentads (mmmm) from 25 to 55%; intrinsic viscosity [η] measured in tetraline at 135°C from 1 to 3dL/g; content of xylene insoluble fraction at 0°C from 3 to 60%; and a ratio ES 2 /ES 1 ≥1, where ES 1 is the boiling diethyl ether soluble fraction determined on the polymer as such and ES 2 is the boiling diethyl ether soluble fraction determined after milling the polymer. The butene-1 (co)polymers show a good balance between processability and elastomeric behavior.
Abstract:
A solid catalyst component for the (co)polymerization of olefins, comprising Ti, Mg, halogen, and at least one compound of formula (I) selected from specific non-aromatic diazo compounds is capable to produce LLDPE with good comonomer randomization.
Abstract:
A catalyst for the polymerization of olefins comprising (a) a solid catalyst component containing Mg, Ti and optionally an internal electron donor compound (ID), (b) an aluminium alky compound and (c) an external electron donor (ED) selected from non-aromatic diazo compounds of formula (I). The catalyst system is able to produce polyolefins products with narrow molecular weight distribution.