Bibliographic Details
| Title: |
CATALYST COMPONENTS FOR THE POLYMERIZATION OF OLEFINS |
| Document Number: |
20100261859 |
| Publication Date: |
October 14, 2010 |
| Appl. No: |
12/735147 |
| Application Filed: |
December 09, 2008 |
| Abstract: |
Catalyst component having average particle size equal to or lower than 40 μm comprising a magnesium halide, a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds one of which being present in an amount from 15 to 50% by mol with respect to the total amount of donors and selected from succinates of formula (I) below [chemical expression included] in which the radicals R1 and R2, equal to, or different from, each other are a C1-C20 linear or branched alkyl, alkenyl, cycloalkyl, aryl, arylalkyl or alkylaryl group, optionally containing heteroatoms; and the radicals R3 and R4 equal to, or different from, each other, are C1-C20 alkyl, C3-C20 cycloalkyl, C5-C20 aryl, arylalkyl or alkylaryl group with the proviso that at least one of them is a branched alkyl; said compounds being, with respect to the two asymmetric carbon atoms identified in the structure of formula (I), stereoisomers of the type (S,R) or (R,S) and at least another electron donor compound which is extractable, under the test of extractability disclosed in the characterization section, for more than 30% by mol |
| Inventors: |
Vincenzi, Paolo (Ficarolo, IT); Patroncini, Giovanni (Ferrara, IT) |
| Assignees: |
Basell Poliolefine Italia s.r.l. (Milan, IT) |
| Claim: |
1. Solid catalyst component having an average particle size of at most 40 μm comprising: a magnesium halide; a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds one of which being present in an amount from 15 to 50% by mol with respect to the total amount of donors and selected from succinates of formula (I): [chemical expression included] in which the radicals R1 and R2, equal to, or different from, each other are a C1-C20 linear or branched alkyl, alkenyl, cycloalkyl, aryl, arylalkyl or alkylaryl group, optionally containing heteroatoms; and the radicals R3 and R4 equal to, or different from, each other, are C1-C20 alkyl, C3-C20 cycloalkyl, C5-C20 aryl, arylalkyl or alkylaryl group with the proviso that at least one of them is a branched alkyl, said compounds being, with respect to the two asymmetric carbon atoms identified in the structure of formula (I), stereoisomers of the type (S,R) or (R,S); and at least another electron donor compound which is extractable for more than 30% by mol. |
| Claim: |
2. The catalyst component according to claim 1 wherein the amount of succinates of formula (I) is between 20 and 45 by mol with respect to the total amount of the electron donor compounds. |
| Claim: |
3. The catalyst component according to claim 1 wherein the succinate of formula (I) is chosen from the (S,R) (S,R) forms pure or in mixture, optionally in racemic form, of diethyl 2,3-bis(trimethylsilyl)succinate, diethyl 2,3-bis(2-ethylbutyl)succinate, diethyl 2,3-dibenzylsuccinate, diethyl 2,3-diisopropylsuccinate, diisobutyl 2,3-diisopropylsuccinate, diethyl 2,3-bis(cyclohexylmethyl)succinate, diethyl 2,3-diisobutylsuccinate, diethyl 2,3-dineopentylsuccinate, diethyl 2,3-dicyclopentylsuccinate, or diethyl 2,3-dicyclohexylsuccinate. |
| Claim: |
4. The catalyst component according to claim 1 further comprising an average particle size lower than 35 μm. |
| Claim: |
5. The catalyst component according to claim 1 wherein the extractable electron donor compounds are selected from esters of mono or dicarboxylic organic acids |
| Claim: |
6. The catalyst component according to claim 5 wherein the extractable electron donor compounds are selected from benzoates, malonates, phthalates or succinates different from those of formula (I). |
| Claim: |
7. The catalyst component according to claim 6 wherein the extractable donor is selected from phthalates. |
| Claim: |
8. A catalyst for the polymerization of olefins comprising the product of the reaction between: (i) a solid catalyst component having an average particle size of at most 40 μm comprising: a magnesium halide; a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds one of which being present in an amount from 15 to 50% by mol with respect to the total amount of donors and selected from succinates of formula (I): [chemical expression included] in which the radicals R1 and R2, equal to, or different from, each other are a C1-C20 linear or branched alkyl, alkenyl, cycloalkyl, aryl, arylalkyl or alkylaryl group, optionally containing heteroatoms; and the radicals R3 and R4 equal to, or different from, each other, are C1-C20 alkyl, C3-C20 cycloalkyl, C5-C20 aryl, arylalkyl or alkylaryl group, with the proviso that at least one of them is a branched alkyl, said compounds being, with respect to the two asymmetric carbon atoms identified in the structure of formula (I), stereoisomers of the type (S,R) or (R,S); and at least another electron donor compound which is extractable for more than 30% by mol; (ii) an organo-metal compound; and (iii) an external electron donor compound. |
| Claim: |
9. A process for the polymerization of olefins carried out in the presence of a catalyst comprising the product of the reaction between: (i) a solid catalyst component having an average particle size of at most 40 μm comprising: a magnesium halide; a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds one of which being present in an amount from 15 to 50% by mol with respect to the total amount of donors and selected from succinates of formula (I): [chemical expression included] in which the radicals R1, and R2, equal to, or different from, each other are a C1-C20 linear or branched alkyl, alkenyl, cycloalkyl, aryl, arylalkyl or alkylaryl group, optionally containing heteroatoms; and the radicals R3 and R4 equal to, or different from, each other, are C1-C20 alkyl, C3-C20 cycloalkyl, C5-C20 aryl, arylalkyl or alkylaryl group, with the proviso that at least one of them is a branched alkyl, said compounds being, with respect to the two asymmetric carbon atoms identified in the structure of formula (I), stereoisomers of the type (S,R) or (R,S); and at least another electron donor compound which is extractable for more than 30% by mol; (ii) an organo-metal compound; and (iii) an external electron donor compound. |
| Claim: |
10. The process according to claim 9 carried out in gas-phase. |
| Claim: |
11. The process according to claim 10 wherein propylene is polymerized in a fluidized-bed reactor. |
| Current U.S. Class: |
5261/254 |
| Current International Class: |
08; 01 |
| Accession Number: |
edspap.20100261859 |
| Database: |
USPTO Patent Applications |
