Abstract:
where each Q is a group —COOR1, in which R1 is selected from C1-C15 hydrocarbon groups, optionally containing a heteroatom selected from the group consisting of halogens, P, S, N and O; or a group —CON(R2)2, in which R2 groups, equal to or different from each other, are hydrogen or R1 groups which can be fused together to form one or more cycles, and A is a bivalent bridging group with the proviso that the Q groups cannot be simultaneously a group —COOR1 or —CON(R2)2.
Abstract:
Catalyst component for the polymerization of olefins comprising Mg, Ti and an electron donor of formula (I) In which X and Y are selected from, R 1 , and -OR 1 and -NR 2 , B is oxygen or sulphur S is sulphur, R 1 is selected from C 1 -C 15 hydrocarbon groups, optionally contain a heteroatom selected from halogen, P, S, N,0 and Si, which can be fused together to form one or more cycles, R is hydrogen or R 1 and A is a bivalent bridging group with chain length between the two bridging bonds being 1-10 atoms.
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.
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 C1-C15 hydrocarbon groups which can be also linked to form one or more cycles, m is an integer from 1 to 5 and R5 is a C1-C15 alkyl group, said electron donors A and B being in amounts such that the A/B molar ratio is lower than 20.