Abstract:
Catalyst component for the polymerization of olefins comprising Mg, Ti and an electron donor compound of the following formula (I) In which R to R 4 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 may be linked to form a saturated or unsaturated mono or polycycle and R 5 groups are selected from C 1 -C 15 hydrocarbon groups optionally containing an heteroatom selected from halogen, P, S, N and Si.
Abstract:
Catalyst component for the polymerization of olefins comprising Mg, Ti and an electron donor compound of the following formula (I) In which R 1 to R 4 groups, equal to or different from each other, are hydrogen, C 1 -C 15 hydrocarbon groups, optionally containing an heteroatom selected from halogen, P, S, N and S i ,, R 6 group is selected from C 1 -C 15 hydrocarbon groups optionally containing an heteroatom selected from halogen, P, S, N and Si, and R 5 is selected from phenyl groups mono or poly substituted with halogens, said groups R 1 -R 4 being also optionally linked to form a saturated or unsaturated mono or poly cycle.
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 for the polymerization of olefins comprising Mg, Ti and at least two electron donor compounds, one of which (A) belonging to specific diolesters and the other electron donor compound (B) being selected from aromatic monoesters of the following formula (B) in which R groups equal to or different from each other, are selected from C 1 -C 15 hydrocarbon groups which can be also linked to form one or more cycles, m is an integer from 1 to 5 and R 5 is a C 1 -C 15 alkyl group, said electron donors A and B being in amounts such that the A/B molar ratio is lower than 20.
Abstract:
A solid catalyst component which exhibits high activity and stereo specificity polymerization of olefins comprising Mg, Ti and an electron donor of formula (I) where R and R 1 are selected from C 1 -C 20 hydrocarbon groups C 6 -C 14 aryl or alkylaryl groups hydrocarbon groups, optionally containing a heteroatom selected from halogen, P, S, N,O; R 2 to R 11 groups, equal to or different from each other, are hydrogen, halogen or C 1 -C 15 hydrocarbon groups which can be optionally fused together to form one or more cycles with the proviso that R 6 and R 11 cannot join together to form a phenyl ring.
Abstract:
A solid catalyst component for the polymerization of olefins comprising Mg, Ti, halogen and an electron donor of formula (I) or (II). When activated with an aluminum alkyl and optionally an external electron donor is capable to give high activity and stereospecificity in the polymerization of olefins.
Abstract:
A solid catalyst component for the polymerization of olefins comprising Mg, Ti and an electron donor of formula (I), where each Q is a group –COOR 1 in which R 1 is selected from C 1 -C 15 hydrocarbon groups, optionally containing a heteroatom selected from halogen, P, S, N,O; or a group –CON(R 2 ) 2 in which R 2 groups, equal to or different from each other, are hydrogen or R 1 groups which can be fused together to form one or more cycles, and A is a bivalent bridging group with the proviso that Q groups cannot be simultaneously a group – COOR 1 or –CON(R 2 ) 2 .
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:
Catalyst component for the polymerization of olefins comprising Mg, Ti and an electron donor of formula (I), where R1 and R2, independently, are selected from hydrogen and C 1 -C 15 hydrocarbon groups, optionally contain an heteroatom selected from halogen, P, S, N, O and Si, which can be fused together to form one or more closed cycles and A is a bivalent bridging group.
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.