Itaru Asano has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: A process of producing polymer microparticles wherein, in a system which includes a polymer (A), a polymer (B) and an organic solvent and can cause phase separation into two phases of a solution phase mainly composed of the polymer (A) and a solution phase mainly composed of the polymer (B) when the polymer (A), the polymer (B) and the organic solvent are dissolved and mixed together, after an emulsion is formed at a temperature of 100° C. or higher, the polymer (A) is precipitated by bringing a poor solvent for the polymer (A) into contact with the emulsion.
Abstract: A process is provided for producing carbon microparticles, wherein resin microparticles, metal-containing resin microparticles or daughter-particle-containing resin microparticles are subjected to carbonization baking, and wherein the synthetic resin microparticles, the metal-containing resin microparticles or the daughter-particle-containing resin microparticles are produced by a process comprising mixing a polymer (A) such as polyacrylonitrile copolymer microparticles composed of a copolymer of an acrylonitrile monomer and a hydrophilic vinyl monomer with a polymer (B) that is different from the polymer (A) in an organic solvent to produce an emulsion and bringing the emulsion into contact with a poor solvent for the polymer (A), thereby causing the polymer (A) to precipitate; and the carbon microparticles.
Abstract: A method of producing an aromatic polyethersulfone (PES) having hydroxyphenyl end groups suitable as an alloying agent includes heating an aromatic polyester sulfone obtained beforehand by polymerization and a dihydric phenol compound and/or water and a basic compound in an aprotic polar solvent. According to this method, a PES having reactive hydroxyphenyl end groups, which can be suitably finely dispersed into a matrix resin when a thermoplastic resin or thermosetting resin and the PES are alloyed with each other, can be produced efficiently in a short time by an economical and simple method.
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.