Method for producing polymer fine particle comprising contacting an emulsion with a poor solvent
AssigneeToray Industries, Inc.
InventorsItaru Asano, Yuji Echigo, Hiroshi Takezaki
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Abstract
A fine polymer particle production method includes producing an emulsion in a liquid prepared by dissolving and mixing a polymer A and a polymer B in organic solvents in which a solution phase composed primarily of the polymer A and a solution phase composed primarily of the polymer B are formed as separate phases, and bringing it into contact with a poor solvent for the polymer A to precipitate the polymer A. This method serves for easy synthesis of fine polymer particles with a narrow particle size distribution and the method can be effectively applied to production of highly heat-resistant polymers that have been difficult to produce with the conventional methods.
Claims10
A method of producing fine polymer particles comprising:
- producing an emulsion in a liquid prepared by dissolving and mixing a polymer A and a polymer B in organic solvents in which a solution phase composed primarily of the polymer A and a solution phase composed primarily of the polymer B are formed as separate phases, wherein the solvents in the two phases resulting from the phase separation are substantially identical to each other;
- and
- contacting the emulsion with a poor solvent for the polymer A to precipitate the polymer A.
Dependencies are inferred from the claim text.