Catalyst components for the polymerization of olefins

Patent metadata

Field	Value
Publication number	US-9453088-B2
Application number	US-73527808-A
Country	US
Kind code	B2
Filing date	Dec 22, 2008
Priority date	Dec 28, 2007
Publication date	Sep 27, 2016
Grant date	Sep 27, 2016

Abstract

Prepolymerized catalyst component for the polymerization of olefins CH 2 ═CHR in which R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, having average particle size equal to or lower than 30 μm comprising a solid catalyst component comprising magnesium halide, a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds one of which being selected from 1,3-diethers and the other one being selected from esters of aromatic mono or dicarboxylic acids, said solid catalyst component being prepolymerized with an olefin, having from 2 to 10 carbon atoms, to such an extent that the amount of the olefin prepolymer is equal to or lower than 50 g per g of solid catalyst component.

First claim

The invention claimed is:

1. Prepolymerized catalyst component for the polymerization of olefins CH 2 ═CHR wherein R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, having an average particle size equal to, or lower than, 30 μm comprising a solid catalyst component which comprises magnesium halide, a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds one of which being selected from 1,3-diethers and the other one being selected from esters of aromatic mono or dicarboxylic acids, said solid catalyst component being prepolymerized with an olefin, having from 2 to 10 carbon atoms, wherein the amount of the olefin polymer so obtained is equal to, or lower than, 50 g per g of solid catalyst component.

2. The prepolymerized catalyst component according to claim 1 wherein the 1,3-diethers are selected from those of formula (I):

where R I and R II are the same or different and are hydrogen or linear or branched C 1 -C 18 hydrocarbon groups which can also form at least one cyclic structure; R III groups, equal or different from each other, are hydrogen or C 1 -C 18 hydrocarbon groups; and R IV groups equal or different from each other, have the same meaning of R III except that they cannot be hydrogen; and wherein each of the R I to R IV groups can contain heteroatoms selected from halogens, N, O, S and Si.

3. The prepolymerized catalyst component according to claim 2 wherein the 1,3-diethers are selected from the compounds of formula (III):

where the R VI radicals equal or different are hydrogen; halogens, C 1 -C 20 alkyl radicals, linear or branched; C 3 -C 20 cycloalkyl, C 6 -C 20 aryl, C 7 -C 20 alkylaryl and C 7 -C 20 aralkyl radicals, optionally containing at least one heteroatom selected from the group consisting of N, O, S, P, Si and halogens, as substitutes for carbon or hydrogen atoms, or both;
the radicals R III equal or different to each other, are selected from the group consisting of hydrogen; halogens; C 1 -C 20 alkyl radicals, linear or branched; C 3 -C 20 cycloalkyl, C 6 -C 20 aryl, C 7 -C 20 alkaryl and C 7 -C 20 aralkyl radicals; and
R IV groups equal or different from each other, have the same meaning of R III except that they cannot be hydrogen; and wherein each of the R I to R IV groups can contain heteroatoms selected from halogens, N, O, S and Si.

4. The prepolymerized catalyst component according to claim 1 wherein the esters of aromatic mono or dicarboxylic acids compound are selected from phthalates.

5. The prepolymerized catalyst component according to claim 4 wherein said esters are C 1 -C 6 linear or branched alkyl esters of phthalic acids.

6. The prepolymerized catalyst component according to claim 1 wherein a molar ratio between the 1,3-diether and the ester donor is in the range of from 0.02 to 50.

7. A catalyst for the polymerization of olefins CH 2 ═CHR, wherein R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, comprising the product of the reaction between:
(i) a prepolymerized solid catalyst component having an average particle size equal to, or lower than, 30 μm comprising a solid catalyst component which comprises magnesium halide, a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds one of which being selected from 1,3-diethers and the other one being selected from esters of aromatic mono or dicarboxylic acids, said solid catalyst component being prepolymerized with an olefin, having from 2 to 10 carbon atoms, wherein the amount of the olefin polymer so obtained is equal to, or lower than, 50 g per g of solid catalyst component; and
(ii) an alkylaluminum compound.

8. The catalyst according to claim 7 further comprising an external electron donor compound.

9. The catalyst according to claim 8 wherein the electron donor compound is selected from silicon compounds of formula R a 5 R b 6 Si(OR 7 ) c , where a and b are integer from 0 to 2, c is an integer from 1 to 4 and the sum (a+b+c) is 4; R 5 , R 6 and R 7 are alkyl, cycloalkyl or aryl radicals with 1-18 carbon atoms, optionally containing heteroatoms.

10. The catalyst according to claim 9 wherein a is 1, b is 1 and c is 2.

11. A gas phase process for the (co)polymerization of olefins CH 2 ═CHR, wherein R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, carried out in the presence of a catalyst comprising the product of the reaction between:
(i) a prepolymerized solid catalyst component having an average particle size equal to, or lower than, 30 μm comprising a solid catalyst component which comprises magnesium halide, a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds one of which being selected from 1,3-diethers and the other one being selected from esters of aromatic mono or dicarboxylic acids, said solid catalyst component being prepolymerized with an olefin, having from 2 to 10 carbon atoms, wherein the amount of the olefin polymer so obtained is equal to, or lower than, 50 g per g of solid catalyst component;
(ii) an alkylaluminum compound; and
(iii) optionally an external donor compound.

12. The prepolymerized catalyst component of claim 3 where the R VI radicals equal or different are Cl or F.

13. The prepolymerized catalyst component of claim 3 where the at least one heteroatom is Cl or F, as substitutes for carbon or hydrogen.

Assignees

• Collina Gianni
• Fusco Ofelia
• Basell Poliolefine Italia Srl

Inventors

• Collina Gianni
• Fusco Ofelia

Classifications

• C08F4/651

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

• B01J31/38

  of titanium, zirconium or hafnium · CPC title

• B01J31/0272

  containing elements other than those covered by B01J31/0201 - B01J31/0255 · CPC title

• C08F110/06 Primary

  Propene · CPC title

• B01J27/138

  with alkaline earth metals, magnesium, beryllium, zinc, cadmium or mercury · CPC title