Solid catalyst component for olefin polymerization, method for producing solid catalyst component for olefin polymerization, method for producing catalyst for olefin polymerization and method for producing polymer of olefin

Patent metadata

Field	Value
Publication number	US-12060378-B2
Application number	US-202217715343-A
Country	US
Kind code	B2
Filing date	Apr 7, 2022
Priority date	Apr 28, 2021
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

Provided is a solid catalyst component for olefin polymerization which is capable of exerting favorable ethylene responsiveness while forming a propylene homopolymer having high stereoregularity, when subjected to ethylene-propylene copolymerization reaction. The present invention provides a solid catalyst component for olefin polymerization, comprising titanium, magnesium, halogen, and an internal electron-donating compound, wherein the internal electron-donating compound comprises an electron-donating compound (i) having a phthalic acid ester structure, and an electron-donating compound (ii) having two or more kinds of groups selected from an ether group, an ester group and a carbonate group and having no phthalic acid ester structure, wherein a content ratio of the electron-donating compound (ii) having two or more kinds of groups selected from an ether group, an ester group and a carbonate group and having no phthalic acid ester structure is 0.5 to 1.5% by mass.

First claim

What is claimed is:

1. A solid catalyst component for olefin polymerization, comprising titanium, magnesium, halogen, and an internal electron-donating compound, wherein
the internal electron-donating compound comprises
an electron-donating compound (i) having a phthalic acid ester structure, and
an electron-donating compound (ii) having two or more groups selected form ether groups, ester groups, or a combination thereof and an ester group and having no phthalic acid ester structure, wherein
a mass percentage of the electron-donating compound (ii) in the solid catalyst component is 0.5 to 1.5% by mass.

2. A method for producing a solid catalyst component for olefin polymerization, comprising in order the steps of:
(a) contacting dialkoxy magnesium, a tetravalent titanium halogen compound, and an electron-donating compound (i) having a phthalic acid ester structure with each other to obtain a contact product; and
(b) contacting the contact product, a tetravalent titanium halogen compound, and an electron-donating compound (ii) having two or more groups selected form ether groups, ester groups, or a combination thereof and an ester group and having no phthalic acid ester structure with each other.

3. A method for producing a catalyst for olefin polymerization, comprising contacting the solid catalyst component for olefin polymerization according to claim 1 , and an organoaluminum compound represented by the following general formula (I):
R 1 p AlQ 3-p   (I)

wherein R 1 is an alkyl group having 1 to 6 carbon atoms, Q is a hydrogen atom or a halogen atom, p is 0<p£3, when a plurality of R 1 are present, these R 1 are the same as or different from each other, and when a plurality of Q are present, these Q are the same as or different from each other,
with each other to obtain a catalyst for olefin polymerization.

4. The method for producing a catalyst for olefin polymerization according to claim 3 , comprising contacting the solid catalyst component for olefin polymerization, the organoaluminum compound represented by the general formula (I), and further, an external electron-donating compound with each other to obtain a catalyst for olefin polymerization.

5. A method for producing a polymer of an olefin, comprising polymerizing an olefin using a catalyst for olefin polymerization obtained by the production method according to claim 3 .

6. A method for producing a catalyst for olefin polymerization, comprising contacting a solid catalyst component for olefin polymerization obtained by the production method according to claim 2 , and an organoaluminum compound represented by the following general formula (I):
R 1 p AlQ 3-p   (I)

wherein R 1 is an alkyl group having 1 to 6 carbon atoms, Q is a hydrogen atom or a halogen atom, p is 0<p£3, when a plurality of R 1 are present, these R 1 are the same as or different from each other, and when a plurality of Q are present, these Q are the same as or different from each other,
with each other to obtain a catalyst for olefin polymerization.

7. The method for producing a catalyst for olefin polymerization according to claim 6 , comprising contacting the solid catalyst component for olefin polymerization, the organoaluminum compound represented by the general formula (I), and further, an external electron-donating compound with each other to obtain a catalyst for olefin polymerization.

8. A method for producing a polymer of an olefin, comprising polymerizing an olefin using a catalyst for olefin polymerization obtained by the production method according to claim 4 .

Assignees

• Toho Titanium Co Ltd

Inventors

• Uzawa Tsutomu
• Uozumi Toshiya

Classifications

• C08F4/6494

  containing oxygen · CPC title

• C08F4/654

  with magnesium or compounds thereof · CPC title

• C08F4/653

  with metals of C08F4/64 or compounds thereof · CPC title

• C08F110/06

  Propene · CPC title

• C08F210/06 Primary

  Propene · CPC title