CATALYST SYSTEM FOR POLYMERIZATION OF AN OLEFIN

• US 20160311946A1
• Filed: 12/19/2014
• Published: 10/27/2016
• Est. Priority Date: 12/20/2013
• Status: Active Grant

• Current Assignee: SABIC Global Technologies BV (Government of Saudi Arabia), Saudi Basic Industries Corporation (Government of Saudi Arabia)
• Original Assignee: SABIC Global Technologies BV (Government of Saudi Arabia), Saudi Basic Industries Corporation (Government of Saudi Arabia)
• Inventors: BATINAS-GEURTS, Aurora Alexandra, BUKATOV, Gennadii Dimitrievich, SERGEEV, Sergei Andreevich, ZAKHAROV, Vladimir Aleksandrovich, ZUIDEVELD, Martin Alexander
• Granted Patent: US 9,926,391 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C08F 110/06 Propene
• CPC Class Codes: C08F 2500/04 Broad molecular weight distribution, i.e. Mw/Mn > 6
• CPC Class Codes: C08F 2500/15 Isotactic
• CPC Class Codes: C08F 4/651 Pretreating with non-metals or metal-free compounds
• CPC Class Codes: C08F 4/6565 and magnesium or compounds thereof

Abstract

The invention relates to a process for the preparation of a procatalyst suitable for preparing a catalyst composition for olefin polymerization. The invention also relates to a procatalyst obtained or obtainable by the process. The invention further relates to the use of a benzamide as an activator in the preparation of a Ziegler-Natta procatalyst. The invention also relates to a process for the preparation of polyolefins. The invention also relates to a polyolefin. The invention further relates to a shaped article.

Claims

1. A process for the preparation of a procatalyst for preparing a catalyst composition for olefin polymerization, said process comprising

providing a magnesium-based support, and

contacting said magnesium-based support with a Ziegler-Natta type catalytic species, an internal donor, activated by an activator, to yield a procatalyst, wherein the activator is a benzamide according to Formula X

2. The process according to claim 1, wherein the internal donor is selected from aminobenzoates, succinates, silyl esters, silyl diol esters, 1, 3-diethers and phthalates.

3. The process according to claim 1, wherein the process is essentially phthalate free.

4. The process according to claim 1, wherein the process comprises:

A) providing said procatalyst obtained via a process comprising;

i) contacting a compound R⁴_zMgX⁴_2-z with an alkoxy- or aryloxy-containing silane compound to give a first intermediate reaction product, being a solid Mg(OR¹)_xX¹_2-x, wherein;

R⁴ is the same as R¹ being a linear, branched or cyclic hydrocarbyl group independently selected from alkyl, alkenyl, aryl, aralkyl or alkylaryl groups, and one or more combinations thereof;

wherein said hydrocarbyl group is substituted or unsubstituted, optionally comprises one or more heteroatoms and has from 1 to 20 carbon atoms;

X⁴ and X¹ are each independently selected from fluoride (F⁻

), chloride (Cl⁻

), bromide (Br⁻

) or iodide (I⁻

); and

z is in a range of larger than 0 and smaller than 2, being 0<

z<

2;

ii) contacting the solid Mg(OR¹)_xX_2-x obtained in step i) with at least one activating compound of formula M¹(OR²)_v-w(OR³)_w or M²(OR²)_v-w(R³)_w, to obtain a second intermediate product;

wherein;

M¹ is a metal selected from Ti, Zr, Hf, Al or Si;

M² is a metal being Si;

v is the valency of M¹ or M²;

R² and R³ are each a linear, branched or cyclic hydrocarbyl group independently selected from alkyl, alkenyl, aryl, aralkyl or alkylaryl groups, and one or more combinations thereof;

wherein said hydrocarbyl group is substituted or unsubstituted, optionally comprises one or more heteroatoms, and has from 1 to 20 carbon atoms; and

iii) contacting the first or second intermediate reaction product, obtained respectively in step i) or ii), with a halogen-containing Ti-compound and an internal electron donor to obtain said procatalyst.

5. The process according to claim 4, wherein the contacting the first or second intermediate reaction product, obtained respectively in step i) or ii), with a halogen-containing Ti-compound comprises

first, contacting the intermediate reaction product with a halogen-containing Ti-compound to produce a first intermediate;

second, contacting the intermediate reaction product with a halogen-containing Ti-compound to produce a second intermediate reaction product; and

contacting the intermediate reaction product with a halogen-containing Ti-compound to produce the procatalyst.

6. The process according to claim 1, wherein the benzamide according to formula X is present in the procatalyst in an amount from 0.1 to 4 wt. % as determined using HPLC.

7. The process according to claim 1, wherein the internal donor is selected from an aminobenzoate represented by Formula XI:

8. The process according to claim 1, wherein

the internal donor is selected from a succinates according to Formula VIII

9. The process according to claim 1, wherein in the benzamide according to formula X at least one of R⁷⁰ and R⁷¹ is an alkyl group, wherein the alkyl has from 1 to 6 carbon atoms.

10. A procatalyst obtained by the process according to claim 1.

12. A process for the preparation of polyolefins, comprising contacting of a catalyst composition comprising the procatalyst of claim 10 with an olefin, and optionally an external donor and/or optionally a co-catalyst.

13. A polyolefin, obtained by the process according to claim 12.

14. The polyolefin according to claim 13, wherein the polyolefin has a molecular weight distribution defined by M_w/M_n of at least 6.5, wherein the M_w and M_n are measured according to ASTM D6474-12.

15. A shaped article, comprising the polyolefin of claim 13.

16. The process according to claim 5, wherein the benzamide according to formula X is added in the first contacting.

17. The process according to claim 7, wherein R₈₃, R₈₄, R₈₅ and R₈₆ are independently selected from C₁-C₁₀ straight and branched alkyl and phenyl;

and R₈₀ is phenyl.

18. The process according to claim 7, wherein

in the benzamide according to formula X at least one of R⁷⁰ and R⁷¹ is an alkyl group, wherein the alkyl has from 1 to 6 carbon atoms, and

the internal donor is selected from 4-[benzoyl(methyl)amino]pentan-2-yl benzoate;

2,2,6,6-tetramethyl-5-(methylamino)heptan-3-ol dibenzoate;

4-[benzoyl (ethyl)amino]pentan-2-yl benzoate, 4-(methylamino)pentan-2-yl bis (4-methoxy)benzoate), 3-[benzoyl(cyclohexyl)amino]-1-phenylbutyl benzoate, 3-[benzoyl(propan-2-yl)amino]-1-phenylbutyl, 4-[benzoyl(methyl)amino]-1,1,1-trifluoropentan-2-yl, 3-(methylamino)-1,3-diphenylpropan-1-ol dibenzoate, 3-(methyl)amino-propan-1-ol dibenzoate;

3-(methyl)amino-2,2-dimethylpropan-1-ol dibenzoate, and 4-(methylamino)pentan-2-yl bis (4-methoxy)benzoate).

19. A process for the preparation of polyolefins, comprising contacting of a catalyst composition comprising the procatalyst of claim 18 with an olefin, and optionally an external donor and/or optionally a co-catalyst.

20. A polyolefin, obtained by the process according to claim 19, wherein the polyolefin has a molecular weight distribution defined by M_w/M_n of at least 6.5, wherein the M_w and M_n are measured according to ASTM D6474-12.

21. A shaped article, comprising the polyolefin of claim 20.

11. (canceled)