Catalyst components for the polymerization of olefins

Patent metadata

Field	Value
Publication number	US-9593171-B2
Application number	US-201214111144-A
Country	US
Kind code	B2
Filing date	Mar 29, 2012
Priority date	Apr 12, 2011
Publication date	Mar 14, 2017
Grant date	Mar 14, 2017

Abstract

A porous solid catalyst component 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 selected from 1,3-diethers and the other being selected from succinates, characterized by the fact that the molar ratio ID/Ti is from 0.30 to 0.90, where ID is the total molar amount of succinate and 1,3-diether, the molar ratio of the 1,3-diether donor to the succinate donor is higher than, or equal to, 0.60.

First claim

What is claimed is:

1. A catalyst system comprising:
(A) a solid catalyst component comprising:
(i) a magnesium halide,
(ii) TiCl 4 ,
(iii) a first internal electron donor, and
(iii) a second internal electron donor,
wherein the first internal electron donor compound is a 1,3-diether, and wherein the second internal electron donor is a succinate;
wherein the first internal electron donor and the second internal electron donor have an internal electron donor molar ratio from 0.80-1.80, and the ratio of the total amount of the first and second internal electron donors to Ti is from 0.45-0.75; and
wherein the solid catalyst component has a porosity of greater than 0.40 cm 3 /g, based upon pores with a radius equal to or less than 1 μm present in the solid catalyst component;

(B) an alkylaluminum cocatalyst compound; and
(C) an external electron donor compound selected from silicon compounds of formula R a 5 R b 6 Si(OR 7 ) c , where a and b are integers 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.

2. The catalyst system according to claim 1 , wherein the succinate is selected from formula (I):

wherein the radicals R 1 and R 2 , equal to or different from each other, are a C 1 -C 20 linear or branched alkyl, alkenyl, cycloalkyl, aryl, arylalkyl or alkylaryl group, optionally containing heteroatoms; the radicals R 3 to R 6 equal to or different from each other, are hydrogen or a C 1 -C 20 linear or branched alkyl, alkenyl, cycloalkyl, aryl, arylalkyl or alkylaryl group, optionally containing heteroatoms, and the radicals R 3 to R 6 which are joined to the same carbon atom of the succinate chain can be linked together to form a cycle.

3. The catalyst system according to claim 1 , wherein the 1,3-diether has a formula (III):

wherein 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 one or more cyclic structures;R III groups, equal or different from each other, are hydrogen or C 1 -C 18 hydrocarbon groups; R IV groups equal or different from each other, have the same meaning of R III except that they cannot be hydrogen; each of R I to R IV groups can contain heteroatoms selected from halogens, N, O, S and Si.

4. The catalyst system according to claim 1 , wherein the solid catalyst component is supported on a Mg halide in active form.

Assignees

• Guidotti Simona
• Morini Giampiero
• Esposito Simona
• Mignogna Alessandro
• Pater Joachim T M
• Piemontesi Fabrizio
• Brita Diego
• Basell Poliolefine Italia Srl

Inventors

• Guidotti Simona
• Morini Giampiero
• Esposito Simona
• Mignogna Alessandro
• Pater Joachim T M
• Piemontesi Fabrizio
• Brita Diego

Classifications

• C08F10/06 Primary

  Propene · CPC title

• C08F4/16 Primary

  of silicon, germanium, tin, lead, titanium, zirconium or hafnium · CPC title

• C08F2500/15

  Isotactic · CPC title

• C08F210/06

  Propene · CPC title

• C08F2/001

  Multistage polymerisation processes characterised by a change in reactor conditions without deactivating the intermediate polymer (C08F295/00, C08F297/00 take precedence) · CPC title