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Method for producing polymer fine particle

A manufacturing method and polymer technology, applied in transportation, packaging, and thin material processing, etc., can solve problems such as clear description of specific methods, deterioration of productivity, and many types of solvents

Active Publication Date: 2011-06-15
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the polymers studied by these technologies have the following problems: they are limited to vinyl polymers made of acrylic acid, styrene, etc., and the limit of their heat resistance is about 150°C (Patent Documents 1, 2, 3)
However, there is no clear record about the particle size distribution, and there are still many types of solvents used, and the process is complicated.
In addition, a method of granulating by drying in a liquid is also disclosed, but in the examples, there is no clear description of the specific method, and it is difficult to judge the realizability (Patent Document 3)
Generally, the method of drying in a liquid has a cumbersome process and requires high cost to remove the solvent, so there is a problem that productivity deteriorates

Method used

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  • Method for producing polymer fine particle
  • Method for producing polymer fine particle
  • Method for producing polymer fine particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0283] Example 1

[0284] Into a 100 ml 4-necked flask were charged 2.5 g of polyethersulfone (weight average molecular weight: 67,000 Sumitomo Chemical Co., Ltd. “Sumica Exel (registered trademark)” 5003P) as polymer A, and N-methyl-2- 45 g of pyrrolidone, polyvinyl alcohol as the polymer B (Nippon Synthetic Chemical Industry Co., Ltd. "Goosenol (registered trademark)" GL-05, weight average molecular weight 10,600, SP value 32.8 (J / cm 3 ) 1 / 2 ) 2.5 g, heated to 80° C., and stirred until the polymer was dissolved. The temperature of the system was returned to room temperature, and then 50 g of ion-exchanged water as a poor solvent was added dropwise at a rate of 0.41 g / min via an infusion pump while stirring at a rate of 450 rpm. After adding about 12 g of ion-exchanged water, the system turned white. Stir for 30 minutes after all the water has been added, filter the resulting suspension, wash with 100 g of ion-exchanged water, filter, and vacuum-dry the filtrate at 80°C f...

Embodiment 2

[0285] Example 2

[0286] Into a 100 ml 4-necked flask were charged 2.5 g of polyethersulfone (weight average molecular weight: 67,000 Sumitomo Chemical Co., Ltd. “Sumica Exel (registered trademark)” 5003P) as polymer A, and N-methyl-2- 46.5 g of pyrrolidone, 1.0 g of polyvinyl alcohol as the polymer B (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., "Goisenol (registered trademark)" GL-05), heated to 80° C., and stirred until the polymer was dissolved . The temperature of the system was returned to room temperature, and then 50 g of ion-exchanged water as a poor solvent was added dropwise at a rate of 0.41 g / min via an infusion pump while stirring at a rate of 450 rpm. After adding about 12 g of ion-exchanged water, the system turned white. Stir for 30 minutes after all the water has been added, filter the resulting suspension, wash with 100 g of ion-exchanged water, filter, and vacuum-dry the filtrate at 80°C for 10 hours to obtain 2.1 g of a white solid . ...

Embodiment 3

[0287] Example 3

[0288] Into a 100 ml 4-necked flask were charged 2.5 g of polyethersulfone (weight average molecular weight 67,000 Sumitomo Chemical Co., Ltd. "Sumica Exel (registered trademark)" 5003P) as polymer A, 45 g of dimethyl sulfoxide as an organic solvent, and 2.5 g of polyvinyl alcohol of the polymer B (Nippon Synthetic Chemical Industry Co., Ltd. "Goosenol (registered trademark)" GL-05) was heated to 80° C. and stirred until the polymer was dissolved. The temperature of the system was returned to room temperature, and then 50 g of ion-exchanged water as a poor solvent was added dropwise at a rate of 0.41 g / min via an infusion pump while stirring at a rate of 450 rpm. After adding about 12 g of ion-exchanged water, the system turned white. Stir for 30 minutes after all the water has been added, filter the resulting suspension, wash with 100 g of ion-exchanged water, filter, and vacuum-dry the filtrate at 80°C for 10 hours to obtain 2.2 g of a white solid . Ob...

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Abstract

Disclosed is a method for producing polymer fine particles, which is characterized in that after forming an emulsion in a system obtained by dissolving and mixing a polymer A, a polymer B and an organic solvent, and consisting of two separate phases, namely a solution phase mainly composed of the polymer A and a solution phase mainly composed of the polymer B, a poor solvent of the polymer A is brought into contact with the emulsion, thereby precipitating the polymer A. By this method, polymer fine particles having a narrow particle size distribution can be easily synthesized. Consequently, the method can be effectively applied to production of polymers having high heat resistance which have been difficult to produce.

Description

technical field [0001] The present invention relates to a method for producing polymer microparticles, and more specifically, to a simple production method for producing polymer microparticles with a narrow particle size distribution and polymer microparticles obtained by the method. Background technique [0002] Polymer microparticles are microparticles formed of polymers, and generally have a wide particle size distribution with a diameter of tens of nanometers to hundreds of micrometers. Polymer particles are different from polymer molded products such as films, fibers, injection molded products, and extrusion molded products. Polymer particles have a large specific surface area, and various materials can be modified and improved by utilizing the structure of the particles. Main uses include modifiers for cosmetics, additives for toners, rheology modifiers such as paints, diagnostic reagents for medical use, additives in molded products such as automotive materials and bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/16C08G75/23C08J3/14
CPCC08G65/46C08L77/00C08J2381/06C08G69/46C08J2339/06C08J3/16C08L29/04C08L39/06C08L63/00C08F120/44C08G73/1046C08L55/02C08L71/12C08G75/23C08G64/40C08L81/06B29B9/10B29B9/12B29B2009/125Y10T428/2982C08L2666/04C08F236/12C08G63/88C08G73/14
Inventor 浅野到越后裕司竹崎宏
Owner TORAY IND INC
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