Method of manufacturing polyalkylene carbonate

Patent metadata

Field	Value
Publication number	US-9447236-B2
Application number	US-201414421091-A
Country	US
Kind code	B2
Filing date	May 27, 2014
Priority date	May 27, 2013
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

The present invention relates to a method of manufacturing polyalkylene carbonate. More specifically, the method of manufacturing polyalkylene carbonate includes solution-polymerizing an epoxide compound and carbon dioxide in the presence of a cobalt complex having a neutral singe-site as a catalyst and a solvent, thereby providing stability and adjusting degree of polymerization and being advantageous for performing a post-treatment process after polymerization.

First claim

What is claimed is:

1. A method of manufacturing polyalkylene carbonate comprising:
solution-polymerizing an epoxide compound and continuously or non-continuously injected carbon dioxide in the presence of a catalyst represented by the following Chemical Formula 1 and 1,2-ethylene dichloride as a solvent,
wherein the solvent is used at a weight ratio of 1:0.1 to 1:0.51 based on the epoxide compound:

in Chemical Formula 1,
Q is C1-C20 alkylene, C3-C20 cycloalkylene, C6-C30 arylene, or C1-C20 dioxy radical, including or not including halogen, nitrogen, oxygen, silicon, sulfur, or phosphorus atom,
R 1 to R 7 are each independently or simultaneously, hydrogen; or a C1-C20 alkyl group, a C2-C20 alkenyl group, a C7-C20 alkylaryl group, or a C7-C20 arylalkyl group, including or not including at least one of halogen, nitrogen, oxygen, silicon, sulfur, and phosphorus atom,
R 8 to R 13 are each independently hydrogen or a C1-C20 alkyl group,
n is an integer of 1 to 10, and
X is −Cl, −NO 3 or −OAc.

2. The method of claim 1 , wherein in Chemical Formula 1, R 1 , R 3 , R 5 and R 7 are each independently hydrogen or a C1-C20 alkyl group, R 2 , R 4 and R 6 are each independently a C1-C20 alkyl group, Q is C3-C20 cycloalkylene, n is an integer of 1 to 10, and X is —Cl, —NO 3 or —OAc.

3. The method of claim 2 , wherein in Chemical Formula 1, R 1 , R 3 , R 5 and R 7 are each independently hydrogen, R 2 , R 4 and R 6 are each independently a tert-butyl group, and Q is C3-C20 cycloalkylene.

4. The method of claim 1 , wherein the carbon dioxide is injected at a weight ratio of 0.5:1 to 10:1 based on the epoxide compound.

5. The method of claim 1 , wherein the solution-polymerizing is performed at a temperature of 50 to 100° C. for 30 minutes to 9 hours.

6. The method of claim 1 , wherein in the solution-polymerizing, an ammonium salt selected from the group consisting of (n-Bu) 4 NY (wherein Y═Cl or OAc), [PPN]Cl, [PPN]Br and [PPN]N 3 is further included as a cocatalyst.

7. The method of claim 1 , wherein the epoxide compound is at least one kind selected from the group consisting of C2-C20 alkylene oxide substituted or unsubstituted with halogen or a C1-C5 alkyl group; C4-C20 cycloalkylene oxide substituted or unsubstituted with halogen or a C1-C5 alkyl group; and C8-C20 styrene oxide substituted or unsubstituted with halogen or a C1-C5 alkyl group.

8. The method of claim 1 , wherein the epoxide compound includes C2-C20 alkylene oxide substituted or unsubstituted with halogen or a C1-C5 alkyl group, and has a carbonate linkage selectivity of 99% or more.

9. The method of claim 1 , wherein the polyalkylene carbonate includes polyethylene carbonate having a weight average molecular weight of 1000 to 500,000.

Assignees

• Lg Chemical Ltd

Inventors

• Kim Yoon-Jung
• Park Seung Young
• Jung Taek-Jun
• Cho Yun-Ki

Classifications

• B01J2231/14

  Other (co) polymerisation, e.g. of lactides or epoxides · CPC title

• C08G64/34 Primary

  and cyclic ethers · CPC title

• B01J2531/845

  Cobalt · CPC title

• B01J2531/025

  Ligands with a porphyrin ring system or analogues thereof, e.g. phthalocyanines, corroles · CPC title

• B01J31/22

  Organic complexes · CPC title