Asahi Glass Company, Limited

Elna Co., Ltd.

Toshiya Matsubara

Takeshi Morimoto

Kenji Yamada

Katsumasa Nakahara

Yoshio Oda

Masaharu Tanaka

Hajime Katayama

Hachiro Hirano

Yoshiki Hamatani

Toshihiro Tanuma

Naoto Iwano

Hisao Inokuma

Hideo Shimizu

Jun-ichi Shimoyama

Shigeo Komatsu

Shin Tatematsu

Kazuhiko Yamada

Katsutoshi Misuda

Hirokazu Wakabayashi

Shinichi Suzuki

Nobuyuki Yokota

Hidemi Yamada

Kenichi Ebata

Yoshinori Kon

Hachirou Hirano

Shinji Kondoh

Noriko Torimoto

Kentarou Tsunozaki

Jun-ichiro Kase

Masako Wakabayashi

Masako Harasawa

A process for producing inorganic spheres, which comprises injecting an aqueous liquid containing an inorganic compound into a laminar flow of an organic liquid which runs at a flow rate of from 0.001 to 2 m/s in a flow path compartmentalized by a partition wall through a plurality of inlet holes formed in one partition wall to form a W/O type emulsion containing the organic liquid as a dispersion medium and the aqueous liquid containing the inorganic compound as a dispersed phase, and solidifying the aqueous liquid containing an inorganic compound in the W/O type emulsion, wherein the partition wall having a plurality of inlet holes is made of a metal sheet having a surface subjected to water repellent treatment.

Process and apparatus for producing inorganic spheres

To provide a process for producing inorganic spheres having a substantially uniform particle size with high productivity. In a process for producing inorganic spheres, which comprises a step of injecting an alkaline aqueous liquid containing an inorganic compound into a laminar flow of an organic liquid containing a surfactant through micropores to form a W/O type emulsion, and a step of solidifying droplets of the aqueous liquid containing an inorganic compound in the W/O type emulsion by an acid to form inorganic spheres, as the organic liquid, one which is brought into contact with an acid in a state of the W/O type emulsion or after separated from the W/O type emulsion, or one which is brought into contact with the aqueous liquid and then separated and recovered, is used.

Process for producing inorganic spheres

A process for producing inorganic spheres, which comprises injecting an aqueous liquid containing an inorganic compound through an inlet hole into an organic liquid which flows at a flow rate of from 0.001 to 2 m/s in a laminar flow state in a flow path to form a W/O type emulsion, and solidifying the aqueous liquid containing an inorganic compound in the W/O type emulsion.

A process for producing a silica-alumina composite sol, which comprises mixing a silica hydrogel and an aluminum salt which, when dissolved in water, gives an acidic solution.

Recording medium excellent in ink absorptivity and process for its production, and process for producing silica-alumina composite sol

It is an object of the present invention to obtain a composite sol capable of forming an ink-receiving layer having a high transparency and a high property for fixing dyes. The present invention provides a sol which is a colloidal solution having aggregate particles containing silica and alumina dispersed in an aqueous medium, wherein the silica is such that the primary particles are spherical and the average particle size of the primary particles is from 2 to 200 nm, the average particle size of the aggregate particles is at least twice the average particle size of the silica primary particles and at most 1,000 nm, the &zgr;-potential of the aggregate particles is at least &plus;10 mV, and the pH of the solution is from 3 to 9. The present invention provides a method for producing a silica-alumina composite sol, which comprises gradually adding an aluminum salt of which the liquid exhibits acidity when dissolved in water, to a silica sol, and a method for producing a silica-alumina composite sol, which comprises mixing a silica sol with an alumina sol having a specific surface area of a xerogel obtainable by drying of at least 150 m /g, to form aggregate particles containing silica and alumina, followed by peptization treatment.

Silica-alumina composite sol, processes for producing the same, and recording medium

A process for producing an alumina sol, which comprises stirring a dispersion of an alumina hydrate having a solid content of from 1 to 40 wt % at a pH of from 7 to 12 with an effective consumptive power of at least 0.5 kW/m for aggregation treatment, and then adding an acid thereto for peptization treatment.

Alumina sol, alumina hydrate powder and processes for their production

An alumina hydrate coating fluid having alumina hydrate particles dispersed in an aqueous medium, which contains, as binders, a polyvinyl alcohol and a polymerizable binder which is a compound having a hydrocarbon group with a hydroxy group or a compound having a polyoxyalkylene chain, said compound having a substituent with an unsaturated bond or a substituent with an epoxy group.

Alumina hydrate coating fluid, recording sheet and recorded product

A process for producing an alumina sol, which comprises stirring a dispersion of an alumina hydrate having a solid content of from 1 to 40 wt % at a pH of from 7 to 12 with an effective consumptive power of at least 0.5 kW/m.sup.3 for aggregation treatment, and then adding an acid thereto for peptization treatment.

A recording medium comprising at least one boehmite-containing porous layer on a substrate, wherein the porous layer has pores having a pore radius of from 1 to 30 nm in a pore volume of from 0.3 to 1.2 ml/g, pores having a pore radius of from 10 to 30 nm in a pore volume of from 0.2 to 1.0 ml/g and pores having a pore radius of from 30 to 100 nm in a pore volume of not more than 0.3 ml/g, and the b-axis of a boehmite crystal is oriented vertically with respect to the surface of the substrate.

Recording medium

A recording sheet comprising a substrate and a colorant absorbing layer made of a porous inorganic oxide, formed on the substrate, wherein said colorant absorbing layer contains an organic acid with the first acid dissociation exponent of at most 5, which has an aromatic nucleus or at least two carboxyl groups.

Recording sheet and record

An oxide superconductor having a structure such that a double oxide of at least one metal selected from the Group 2A elements and at least one metal selected from the Group 4A, Group 4B and rare earth elements, is dispersed in oxide superconductor crystals.

Oxide superconductor comprising BaBO.sub.3 dispersions (where B is Zr,

An oxide superconductor comprising a matrix of plate crystals of the formula REBa.sub.2 Cu.sub.3 O.sub.7-y wherein RE is at least one member selected from the group consisting of Y, La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Lu, and y is the amount of oxygen deficiency, oriented and overlaid one on another, and granular crystals of the formula RE.sub.2 BACuO.sub.5 wherein RE is as defined above, insularly dispersed in the matrix in an amount of at least 0.1 mol per mol of the REBa.sub.2 Cu.sub.3 O.sub.7-y crystals.

Oriented superconductor containing a dispersed non-superconducting phase

An electrolytic capacitor comprising a capacitor element and an electrolyte impregnated to the element, wherein the electrolyte comprises benzoic acid or its salt and an aliphatic saturated dibasic carboxylic acid having an odd number of carbon atoms or its salt.

Electrolytic capacitor

An electrolytic capacitor comprising a capacitor element and an electrolyte impregnated to the element, wherein the electrolyte contains a flurorocarboxylic acid or its salt as a solute dissolved in an organic solvent.

An electrolytic capacitor comprising a capacitor element and an electrolyte impregnated to the element, wherein the electrolyte comprises an organic polar solvent and a solute dissolved in the solvent, said solute being selected from the group consisting of a quaternary ammonium salt of an aromatic carboxylic acid, a quaternary ammonium salt of cycloalkene carboxylic acid and a quaternary ammonium salt of an unsaturated aliphatic carboxylic acid.

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Chiba, Japan

Toshiya Matsubara