Abstract:
Propylene-ethylene copolymers showing an ethylene content of between 0.1 and 10% by weight, a molecular weight distribution (MWD), expressed in terms of Mw/Mn, greater than 3.0 and a content of xylene soluble fraction (XS) and ethylene content (C2) such that the point defined by said values falls below the line given by the equation XS= 1.0296 . e 0.435C2 show high transparency and low melting temperature.
Abstract:
A solid catalyst component for the (co)polymerization of olefins CH 2 =CHR, in which R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, comprising Ti, Mg, and Cl, and optionally an electron donor compound selected from the group consisting of ethers, amines, silanes, carbamates ketones, esters of aliphatic acids, alkyl and aryl esters of optionally substituted aromatic polycarboxylic acids, diol derivatives chosen among monoesters monocarbamates and monoesters monocarbonates or mixtures thereof characterized by the fact that it contains from 0.1 to 50%wt of Bi with respect to the total weight of said solid catalyst component.
Abstract:
A solid catalyst component for the polymerization of olefins comprising Mg, Ti, Cl and at least an electron donor compound which is the reaction product obtained by bringing into contact a Mg compound and a Ti compound having at least a Ti-halogen bond with an electron donor selected from specific diphenol derivatives.
Abstract:
A solid catalyst 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, Cu, CI, and an electron donor compound characterized by the fact that the Cu/Ti weight ratio is lower than 0.5.
Abstract:
A process for the preparation of high purity propylene polymers carried out in the presence of a catalyst comprising the product obtained by reacting:- an organo-aluminium compound, with - a solid catalyst component comprising Mg, Ti and electron donor compound selected from specific diolesters, said process being carried out employing an organo-aluminum/propylene ratio equal to or lower than 1.75 mmole/kg.
Abstract:
A process for the (co)polymerization of propylene carried out at a temperature ranging from 77 to 95°C in the presence of a catalyst comprising the product obtained by reacting: -an organo-aluminium compound, with -a solid catalyst component comprising Mg, Ti and electron donor compound selected from specific diolesters.
Abstract:
Catalyst component for the polymerization of olefins comprising Mg, Ti and an electron donor of Formula (I) in which R, R 1 and R 4 groups, equal to or different from each other, are C 1 -C 15 hydrocarbon groups and the R groups can be linked to form a cycle, R 2 -R 3 groups, equal to or different from each other, are selected from hydrogen and C 1 -C 15 hydrocarbon groups, the R 1 -R 4 groups can optionally contain an heteroatom selected from halogen, P, S, N,O and Si, n is an integer from 0 to 5 and said electron donor and Ti atoms being present in an amount such that their molar ratio is equal to, or lower than, 0.65.
Abstract:
A Mg compound based catalyst precursor comprising up 50% by mols, with respect to Mg, of a compound of formula K(OR 1 ) where R 1 is H or a C 1 -C 10 hydrocarbon group. When treated with transition metal compounds the said precursor are converted into catalyst with high activity in olefin polymerization.
Abstract:
A catalyst component for the (co)polymerization of olefins, comprising Ti, Mg, halogen, an electron donor (ID) selected from aliphatic cyclic ethers or alkyl esters of aliphatic monocarboxylic acids and a compound of a metal selected from Zn or Cu which is devoid of Zn-C or Cu-C bonds in which the Mg/Ti molar ratio ranges from 4.0 to 50.0 is capable to produce LLDPE with excellent quality due to capability of comonomer randomization.
Abstract:
A catalyst component for the polymerization of olefins 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, which can be fused together to form one or more cycles; n and m are integer from 0 to 3 with the proviso that at least one of them is different from 0 and that diisobutyl o-phenylenediacetate is excluded.