Bibliographic Details
| Title: |
Catalyst Components for the Polymerization of Olefins |
| Document Number: |
20120329963 |
| Publication Date: |
December 27, 2012 |
| Appl. No: |
13/582230 |
| Application Filed: |
March 01, 2011 |
| Abstract: |
The present invention relates to catalysts component for the polymerization of ethylene and its mixtures with olefins CH2═CHR, wherein R is an alkyl, cycloalkyl or aryl radical having 1-12 carbon atoms, comprising Ti, Mg, halogen, and electron donor belonging to 1,2-diethers as internal electron donor compound. The catalyst of the invention is suitably used in (co)polymerization processes of ethylene to prepare (co)polymers having narrow Molecular Weight Distribution (MWD) and high bulk density. |
| Inventors: |
Brita, Diego (Ferrara, IT); Collina, Gianni (Ferrara, IT); Evangelisti, Daniele (Ferrara, IT); Gaddi, Benedetta (Ferrara, IT); Carbonara, Maria (Ferrara, IT); Vincenzi, Paolo (Ficarolo, IT) |
| Assignees: |
BASELL POLIOLEFINE ITALIA S.R.L. (Milano, IT) |
| Claim: |
1. A catalyst component in substantially spherical form comprising Mg, Ti, and halogen having an average particle size from 6 to 11 μm and a porosity (PF), measured by the mercury method and due to pores with radius equal to, or lower than, 1 μm, of at least 0.3 cm3/g. |
| Claim: |
2. The catalyst component of claim 1 wherein the porosity (PF) is higher than 0.4 cm3/g. |
| Claim: |
3. The catalyst component of claim 1 wherein the surface area determined by BET method, is lower than 100 m2/g. |
| Claim: |
4. The catalyst component of claim 1 wherein the average particle size ranges from 7 to 10 μm. |
| Claim: |
5. The catalyst component of claim 1 further comprising an electron donor compound of formula (I): RaCR1(OR4)—CR2R3(OR5) (I) wherein Ra is a methyl group or hydrogen or is condensed with R4 to form a cycle, R1, R2 and R3 are, independently, hydrogen or C1-C20 hydrocarbon groups, optionally containing heteroatoms, R4 and R5 are C1-C20 alkyl groups, or R6CO— groups where R6 is a C1-C20 alkyl group, or they are joined with R and R3 respectively to form a cycle; with the provisos that when Ra is hydrogen, R4 and R5 are not simultaneously methyl, and when Ra and R4 form a cycle, R5 is C1-C20 alky group. |
| Claim: |
6. The catalyst component according to claim 5 wherein R4 and R5 are alkyl groups chosen from C1-C5 alkyl groups. |
| Claim: |
7. The catalyst component according to claim 5 wherein R1 to R3 are hydrogen. |
| Claim: |
8. The catalyst component according to claim 5 wherein R4 and R5 are methyl. |
| Claim: |
9. The catalyst component according to claim 5 wherein the electron donor of formula (I) is selected from ethylene glycol diacetate, 1,2-dimethoxypropane, 1,2-diethoxypropane, or methyl tetrahydrofurfuryl ether. |
| Claim: |
10. The catalyst component according to claim 5 wherein the Ti atoms derive from a titanium compound which contains at least one Ti-halogen bond and the Mg atoms derive from magnesium chloride. |
| Claim: |
11. A catalyst for the polymerization of olefins of formula CH2═CHR, wherein R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, said catalyst comprising the product of the reaction between: (a) a solid catalyst component according to claim 1, and (b) an alkylaluminum compound. |
| Claim: |
12. A process for the polymerization of olefins CH2═CHR, wherein R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, said process being carried out in the presence of the catalyst according to claim 11. |
| Current U.S. Class: |
5261/258 |
| Current International Class: |
08; 08; 08 |
| Accession Number: |
edspap.20120329963 |
| Database: |
USPTO Patent Applications |
