Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Takashi Fukutomi

Michiei Nakamura

Minoru Takizawa

Naomi Oguma

Yoshifumi Sugito

Seiji Doi

Hitoshi Takeuchi

Shojiro Horiguchi

Motohisa Maruyama

Satoshi Mizoguchi

Minoru c/o Dainichiseika Color&Chemicals MfgCo Ltd Takizawa

Naomi c/o Dainichiseika Color&Chemicals MfgCo Ltd Oguma

Seiji c/o Dainichiseika Color&Chemicals MfgCo Ltd Doi

Michiei c/o Dainichiseika Color&Chemicals MfgCo Ltd Nakamura

Yoshifumi c/o Dainichiseika Color&Chemicals MfgCo Ltd Sugito

A charge mosaic membrane having excellent selective permeability comprises a cationic polymer component, an anionic polymer component and a matrix component. Both of the cationic polymer component and the anionic polymer component are crosslinked particulate polymers. The matrix component is at least one polymer selected from a polysulfone resin, a polyarylate resin, a polyamide resin, a polyimide resin, a polyamideimide resin, a polyurethane resin, a fluorinated resin or a silicone resin. The charge mosaic membrane can be easily produced by conducting formation of the membrane by using a composition in which the cationic polymer component and the anionic polymer component are both dispersed in a solution of the matrix component in an organic solvent.

Charge mosaic membrane, its production process, method of its use, and apparatus provided with the same

An ion-selective membrane is formed integrally of an ion-selective membrane forming component and a woven-fabric-shaped backing. The ion-selective membrane forming component comprises a cationic polymer component and/or an anionic polymer component and a matrix component. Each of the ionic polymer components is a particulate polymer having an average particle size in a range of from 0.01 to 10 &mgr;m. The woven-fabric-shaped backing has a meshed structure. The ion-selective membrane can be produced by forming it while maintaining a layer of a coating formulation, in which the ionic polymer component is dispersed in a solution or dispersion of the matrix component in an organic solvent, in close contact with the woven-fabric-shaped backing. The ion-selective membrane is useful for the permeation of an electrolyte. An apparatus provided with the ion-selective membrane is also provided.

Ion-selective membranes, their production process, use of the ion-selective membranes, and apparatuses provided with the ion-selective membranes

A process is disclosed for the production of connected microgel particles. According to the process, starting microgel particles having particle sizes of 100-0.01 .mu.m and a particle size distribution whose standard deviation is not greater than 100% of a mean particle size of the starting microgel particles are dispersed in a matrix component. The starting microgel particles are soaked with a monomer. The monomer is then polymerized, whereby the starting microgels are connected together. Also disclosed is an article comprising a base material and a layer of such connected microgel particles formed on a surface of the base material.

Production process of connected microgel particles and articles treated

A charge mosaic membrane is made of a cationic polymer and an anionic polymer. At least one of the cationic and anionic polymers is in the form of spheres having a diameter of 0.01-10 .mu.m. A process for the production of the charge mosaic membrane is also described.

Charge mosaic membrane and production process thereof

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Nangoku, Japan

Takashi Fukutomi