Polymer particle, manufacturing method thereof, and separator for battery comprising the same

Patent metadata

Field	Value
Publication number	US-10287404-B2
Application number	US-201514915545-A
Country	US
Kind code	B2
Filing date	Jun 15, 2015
Priority date	Jun 13, 2014
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

The present application relates to a polymer particle manufacturing method, and according to an example of the manufacturing method and a manufacturing apparatus therefor, a reduction in energy can be achieved by simplifying a manufacturing process thereof.

First claim

The invention claimed is:

1. A polymer particle manufacturing method, comprising:
manufacturing a first polymer solution including a polymer dissolved in a first solvent;
heating a manufactured first polymer solution to (T m +5) ° C. or above, wherein T m is a melting point (° C.) of the polymer; and
mixing a second solvent with a heated first polymer solution,
wherein the temperature of the second solvent to be mixed with the first polymer solution is adjusted to at or below a crystallization temperature of the polymer, and wherein the crystallization temperature of the polymer is lower than the T m , and
wherein a mixture solution of the first polymer solution and the second solvent is a non-emulsion.

2. The polymer particle manufacturing method of claim 1 , wherein the first solvent is a good solvent with respect to the polymer.

3. The polymer particle manufacturing method of claim 1 , wherein the first solvent has a Hansen relative energy difference of 0.6 or more and less than 2, with respect to the polymer at room temperature.

4. The polymer particle manufacturing method of claim 1 , wherein the first solvent is a monovalent alcohol having 6 or more carbons.

5. The polymer particle manufacturing method of claim 1 , wherein the second solvent has a Hansen relative energy difference of more than 2 and less than 5 with respect to the polymer at room temperature.

6. The polymer particle manufacturing method of claim 1 , wherein the second solvent is a monovalent alcohol having 5 or less carbons, or ketone.

7. The polymer particle manufacturing method of claim 1 , wherein the first solvent is a monovalent alcohol and the second solvent is a monovalent alcohol or ketone.

8. The polymer particle manufacturing method of claim 1 , wherein the polymer is a polyolefin.

9. The polymer particle manufacturing method of claim 1 , wherein the temperature of the second solvent to be mixed with the first polymer solution is adjusted to a range of (T b -70) ° C. to T b ° C., wherein T b is a boiling point (° C.) of the second solvent.

10. The polymer particle manufacturing method of claim 1 , further comprising adjusting a temperature of the mixture solution of the first polymer solution and the second solvent to a range of (T b -35) ° C. to T b ° C., wherein T b is a boiling point (° C.) of the second solvent.

11. The polymer particle manufacturing method of claim 1 , further comprising cooling the mixture solution of the first polymer solution and the second solvent.

Assignees

• Lg Chemical Ltd

Inventors

• Jeong Woong Chan
• Choe Jae Hoon
• Kim Hyun Ju
• Shin Jong Min

Classifications

• H01M50/417

  Polyolefins · CPC title

• H01M50/491

  Porosity · CPC title

• C08J2323/06

  Polyethene · CPC title

• B01D9/0054

  Use of anti-solvent · CPC title

• C08J3/12

  Powdering or granulating · CPC title