Abstract:
Catalyst component for the polymerization of olefins CH 2 =CHR in which R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, comprising Mg, Ti, halogen and two electron donor compounds one of which selected those of formula (I) wherein: R 2 , equal to or different from each other, are hydrogen atoms or C 1 -C 20 hydrocarbon radicals optionally containing heteroatoms belonging to groups 13-17 of the periodic table of the elements or alkoxy groups of formula -OR 1 , two or more of the R 2 groups can be connected together to form a cycle; R 1 , equal to or different from each other, are C 1 -C 20 hydrocarbon radicals optionally containing heteroatoms belonging to groups 13-17 of the periodic table of the elements, with the proviso that at least one of R 2 is -OR 1 and the other being selected from succinates of formula (II): wherein the radicals R 1 and R II , equal to or different from each other, are a C 1 -C 20 linear or branched alkyl, alkenyl, cycloalkyl, aryl, arylalkyl or alkylaryl group, optionally containing heteroatoms; the radicals R III to R IV equal to or different from each other, are hydrogen or a C 1 - C 20 linear or branched alkyl, alkenyl, cycloalkyl, aryl, arylalkyl or alkylaryl group, optionally containing heteroatoms, and the radicals R III to R VI which are joined to the same carbon atom of the succinate chain can be linked together to form a cycle.
Abstract:
Solid adducts comprising a MgCl 2 , ethanol and a compound (A), said compounds being present in molar ratios defined by the following formula MgCl 2 (EtOH) n (A) p in which n is from 0.1 to 6, p ranges from 0.001 to 0.5 and A is a compound selected from cyclic hydrocarbon structures which are substituted with at least two hydroxy groups.
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.