Encapsulated catalyst and methods of olefin polymerization

Patent metadata

Field	Value
Publication number	US-10947330-B2
Application number	US-201816638951-A
Country	US
Kind code	B2
Filing date	Aug 20, 2018
Priority date	Aug 18, 2017
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

A method for encapsulating a catalyst in a dispersed polymer particle comprising dissolving a Group 8 to Group 11 transition metal containing catalyst and a self-dispersing polymer in a solvent; adding water and optionally a base under particle forming conditions to form a dispersed polymer encapsulated catalyst comprising particles having a population number average diameter between 10 and 300 nanometers is provided.

First claim

The invention claimed is:

1. A method for encapsulating a catalyst in a dispersed block copolymer particle comprising:
dissolving a Group 8 to Group 11 transition metal containing catalyst and a self-dispersing block copolymer comprising a water-insoluble block comprising repeat units of esters of (meth)acrylic acid, butadiene, ethyl ethylene, lactide, caprolactone, trimethylene carbonate, glycolide, dimethylsiloxane, cyclooctene, propylene, norbornene, propylene oxide, butylene oxide, or a combination comprising at least one of the foregoing, and a water-soluble block comprising repeat units of ethylene glycol, ethylene oxide, methacrylic acid, acrylic acid, acrylamide, styrene sulfonate, polyethylene glycol esters of (meth)acrylic acid, or a combination comprising at least one of the foregoing, in a water miscible organic solvent; and
adding water and optionally a base and heating to form a dispersed block copolymer encapsulated catalyst comprising particles having a population number average diameter between 10 and 300 nanometers, measured by dynamic light scattering.

2. The method of claim 1 , wherein the heating is at a temperature up to 70° C. and the water is added over 5 minutes to 5 hours until 50 to 75 volume percent of water is reached.

3. The method according to claim 1 , wherein the self-dispersing block copolymer is a polyethyleneglycol-poly(2,2,2-trifluoroethyl methacrylate) diblock copolymer.

4. The method according to claim 1 , wherein the catalyst and polymer are present in an amount of 0.01 to 0.05 weight catalyst/weight polymer.

5. The method according to claim 1 , wherein the water miscible organic solvent is THF, DMF, DMSO, or methanol.

6. The method according to claim 1 , wherein the Group 8 to Group 11 transition metal containing catalyst has the formula:

7. The method according to claim 1 , further comprising adding a salt.

8. A dispersed block copolymer encapsulated catalyst prepared according to the method of claim 1 .

9. A method of catalytic olefin polymerization, comprising contacting a dispersed block copolymer encapsulated catalyst prepared according to the method of claim 1 with one or more monoethylenically unsaturated monomers under polymerization conditions to form a polyolefin.

10. The method of claim 9 , wherein the one or more monoethylenically unsaturated monomers comprise one, two, or three different monoethylenically unsaturated monomers.

11. The method of claim 9 , wherein the one or more monoethylenically unsaturated monomers is ethylene.

12. The method according to claim 9 , wherein the one or more monoethylenically unsaturated monomers are is ethylene, propylene, octene, or a combination comprising at least one of the foregoing.

13. The method according to claim 9 , wherein the polymerization conditions are applying pressure and agitating.

14. The method according to claim 9 , wherein a turn-over frequency in the catalytic olefin polymerization is 1500 to 5000 per hour.

Assignees

• Rohm & Haas
• Univ Illinois

Inventors

• Guironnet Damien
• Rabnawaz Muhammad
• Even Ralph
• Hughes Andrew
• Katz Joshua

Classifications

• C08F2410/06

  Catalyst characterized by its size · CPC title

• C08F293/005

  using free radical "living" or "controlled" polymerisation, e.g. using a complexing agent · CPC title

• C08F10/02 Primary

  Ethene · CPC title

• C08F2410/01

  Additive used together with the catalyst, excluding compounds containing Al or B · CPC title

• C08F4/7022

  NO · CPC title