Magnesium dichloride-ethanol adducts and catalyst component obtained therefrom

Patent metadata

Field	Value
Publication number	US-9670298-B2
Application number	US-201314432080-A
Country	US
Kind code	B2
Filing date	Sep 23, 2013
Priority date	Sep 28, 2012
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

Catalyst component for the polymerization of olefins comprising Mg, Ti and an electron donor of formula (I)

Where R 1 and R 2 , 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.

First claim

The invention claimed is:

1. A catalyst comprising a solid catalyst component comprising: Mg, Ti and an electron donor of formula (I)

where R 1 and R 2 , independently, are selected from hydrogen and C 1 -C 15 hydrocarbon groups, optionally containing a heteroatom selected from halogen, P, S, N, O and Si, which can be fused together to form one or more cycles, and A is a bivalent bridging group.

2. The catalyst according to claim 1 in which A is bivalent bridging group having two free radicals, wherein the chain length between the two free radicals is 1 to 10 atoms.

3. The catalyst according to claim 1 in which the bridging group is of the formula —(ZR 3 m ) n — in which, independently, Z is selected from C, Si, Ge, O, N, S or P, the R 3 groups, equal to or different from each other, are hydrogen or C 1 -C 20 hydrocarbon radicals, optionally containing a heteroatom selected from halogen, P, S, N, O and Si, which can be fused together to form one or more cycles, m is a number satisfying the valences of Z and n is an integer ranging from 1 to 10.

4. The catalyst according to claim 3 in which the bridging group is selected from the group consisting of aliphatic, alicyclic and aromatic bivalent radicals, optionally substituted with C 1 -C 15 hydrocarbon groups and/or with heteroatoms selected from halogen, P, S, N, O and Si, having a bridging chain length ranging from 1 to 6 atoms.

5. The catalyst according to claim 4 in which the bridging group is selected from cyclic aromatic compounds.

6. The catalyst according to claim 1 in which the electron donor compound is selected from those of formula (II)

in which R 1 and R 2 , independently, are selected from hydrogen and C 1 -C 15 hydrocarbon groups, optionally containing an heteroatom selected from halogen, P, S, N, O and Si, which can be fused together to form one or more cycles and R 5 , independently, is selected from hydrogen, halogens or C 1 -C 15 hydrocarbon groups optionally substituted with heteroatoms selected from halogen, P, S, N, O and Si, with the proviso that at least one of R 5 is different from hydrogen.

7. The catalyst according to claim 6 in which in the donor of formula (II) the R 5 groups in position 3,5 and/or 6 are C 1 -C 5 alkyl groups.

8. The catalyst according to claim 7 in which R 5 in position 3 is a primary alkyl group and that in position 5 is a tertiary alkyl group.

9. The catalyst according to claim 1 in which R 1 -R 2 groups are independently selected from hydrogen, C 1 -C 15 alkyl groups, C 6 -C 14 aryl groups, C 3 -C 15 cycloalkyl groups, and C 7 -C 15 arylalkyl or alkylaryl groups.

10. The catalyst according to claim 9 in which R 1 and R 2 are C 1 -C 5 alkyl groups.

11. The catalyst of claim 1 , comprising the product of the reaction between:
(i) the solid catalyst component, and
(ii) an alkylaluminum compound.

12. The catalyst according to claim 11 further comprising an external electron donor compound.

13. The catalyst of claim 11 , wherein at least one olefin having the formula, CH 2 ═CHR, in which R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, is polymerized in the presence of the catalyst.

Assignees

• Basell Poliolefine Italia Srl

Inventors

• Mignogna Alessandro
• Balboni Davide
• Cristofori Antonio
• Morini Giampiero

Classifications

• C08F10/06 Primary

  Propene · CPC title

• C08F4/6543

  halides of magnesium · CPC title

• C08F110/06 Primary

  Propene · CPC title

• C08F2500/12

  Melt flow index or melt flow ratio · CPC title

• C08F4/651

  Pretreating with non-metals or metal-free compounds · CPC title