Brother Kogyo Kabushiki-kaisha

Daikin Industries, Ltd.

Sekisui Chemical Co., Ltd.

Niigata University

Masato Tanaka

Tsuyoshi Noguchi

Naomichi Kobayashi

Fumihiro Kamiya

Yoshinari Taguchi

A composition having excellent scorch resistance and storage stability, the composition containing composite particles and a fluoropolymer, and the composite particles including a polymer and inorganic particles dispersed in the polymer.

Composition comprising fluoropolymer and molded article

Provided is a process for production of composite fine particles with heterogeneous surfaces. The process ensures a high productivity and enables a voluntary control of particle diameters. Further, the process imposes no restrictions on heterogeneous substances added for functional expression, and allows a heterogeneous substance to be encapsulated in central portions of composite fine particle spheres. A composite film obtained by laminating two or more kinds of films is cut into minute pieces, followed by melting the same to obtain spherical minute pieces. Particularly, liquid films are separately formed with two or more kinds of liquids containing polymerizable monomers. Further, two or more kinds of films can thereby be obtained through polymerization. The two or more kinds of films thus obtained are then laminated to further allow polymerization to take place, thus obtaining the composite film.

Process for production of composite fine particles with heterogeneous surfaces

A method of manufacturing polymer particles for use in a toner capable of incorporating fine wax particle in a polymer resin particle also in a case of adopting a dispersion polymerization method used generally so far, thereby enabling to prevent offset in a heat fixing device provided to copying machines or printers thereby improving the fixing property of the toner and capable of forming images at fine fineness when the polymer resin particles are used as the toner. The fine wax particle is dispersed by using the polymeric dispersant into an organic solvent and one or more of monomers for forming the polymer is dissolved and the polymerizing reaction of the monomer is proceeded while depositing the fine polymer particles on the surface of the fine wax particle upon deposition of the polymer into the organic solvent in the initial stage of the polymerizing reaction of the monomer, thereby incorporating the fine wax particles into the formed polymer particle.

Method of manufacturing polymer resin particles for use in toners

Growing community of inventors

Niigata, Japan

Masato Tanaka