Method for producing solid catalyst component for α-olefin polymerization and method for producing α-olefin polymer using the same

Patent metadata

Field	Value
Publication number	US-10526427-B2
Application number	US-201616063042-A
Country	US
Kind code	B2
Filing date	Dec 16, 2016
Priority date	Dec 18, 2015
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

A method for producing a solid catalyst component (Aa) for α-olefin polymerization, which includes: bringing components (A1) to (A4) into contact with one another in an inert solvent; and without washing the contact product with an inert solvent, aging the contact product by keeping for a holding time of 3 days or more and 180 days or less, regarding the time point that all of the components (A1) to (A4) first come into contact, as a starting point.

First claim

The invention claimed is:

1. A method for producing a solid catalyst component (Aa) for α-olefin polymerization, which comprises:
bringing the following components (A1) to (A4) into contact with one another in an inert solvent to form a contact product; and
without washing the contact product with an inert solvent, aging the contact product by keeping for a holding time of 3 days or more and 180 days or less, regarding the time point that all of the components (A1) to (A4) first come into contact, as a starting point:
Component (A1): a solid component containing titanium, magnesium, a halogen, and an electron-donating compound as essential components;
Component (A2): a silane compound having an alkenyl group;
Component (A3): an alkoxysilane compound which is different from the silane compound having an alkenyl group;
Component (A4): an organoaluminum compound.

2. A method for producing a solid catalyst component (Ab) for α-olefin polymerization, which comprises:
bringing the following components (A1) to (A4) into contact with one another in an inert solvent to form a contact product;
without washing the contact product with an inert solvent, bringing the contact product into contact with an ethylenically unsaturated hydrocarbon, to perform a pre-polymerization treatment and form a pre-polymerization treatment product; and
without washing the pre-polymerization treatment product with an inert solvent, aging the pre-polymerization treatment product by keeping for a holding time of 3 days or more and 180 days or less, regarding the time point that all of the components (A1) to (A4) first come into contact, as a starting point:
Component (A1): a solid component containing titanium, magnesium, a halogen, and an electron-donating compound as essential components;
Component (A2): a silane compound having an alkenyl group;
Component (A3): an alkoxysilane compound which is different from the silane compound having an alkenyl group;
Component (A4): an organoaluminum compound.

3. The method for producing a solid catalyst component for α-olefin polymerization according to claim 1 , wherein the holding time is 7 days or more and 90 days or less.

4. The method for producing a solid catalyst component for α-olefin polymerization according to claim 1 , wherein the component (A2) is a vinylsilane compound.

5. The method for producing a solid catalyst component for α-olefin polymerization according to claim 1 , wherein the component (A2) is a divinylsilane compound.

6. The method for producing a solid catalyst component for α-olefin polymerization according to claim 1 , wherein the contact product or the pre-polymerization treatment product at the time of holding is kept in the range where average temperature per day is 0° C. or higher and 60° C. or lower.

7. A method for producing an α-olefin polymer, which comprises bringing an α-olefin into contact with a polymerization catalyst comprising a solid catalyst component for α-olefin polymerization produced by the method according to claim 1 and optionally comprising at least one selected from the group consisting of the following component (B) and the following component (C), to carry out a polymerization:
Component (B): an organoaluminum compound
Component (C): an alkoxysilane compound which is different from the silane compound having an alkenyl group.

8. A method for producing an α-olefin polymer, which comprises bringing an α-olefin into contact with a polymerization catalyst comprising a solid catalyst component for α-olefin polymerization produced by the method according to claim 2 and optionally comprising at least one selected from the group consisting of the following component (B) and the following component (C), to carry out a polymerization:
Component (B): an organoaluminum compound
Component (C): an alkoxysilane compound which is different from the silane compound having an alkenyl group.

9. The method for producing a solid catalyst component for α-olefin polymerization according to claim 2 , wherein the holding time is 7 days or more and 90 days or less.

10. The method for producing a solid catalyst component for α-olefin polymerization according to claim 2 , wherein the component (A2) is a vinylsilane compound.

11. The method for producing a solid catalyst component for α-olefin polymerization according to claim 2 , wherein the component (A2) is a divinylsilane compound.

12. The method for producing a solid catalyst component for α-olefin polymerization according to claim 2 , wherein the contact product or the pre-polymerization treatment product at the time of holding is kept in the range where average temperature per day is 0° C. or higher and 60° C. or lower.

Assignees

• Japan Polypropylene Corp

Inventors

• Fukuda Keiji
• IDA Shouichi
• Tanna Akio
• Mizukami Shigeo

Classifications

• C08F4/658

  with metals or metal-containing compounds, not provided for in a single group of groups C08F4/653 - C08F4/657 · CPC title

• C08F10/00

  Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond · CPC title

• C08F4/65916

  supported on a carrier, e.g. silica, MgCl2, polymer · CPC title

• C08F4/6093

  containing halogen · CPC title

• C08F4/6498

  containing another heteroatom · CPC title