Osaka Yuki Kagaku Kogyo Kabushiki Kaisha

Oosaka Yuuki Kagaku Kogyo Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Mitsui Kensetsu Kabushiki Kaisha

Shiiai Kemutekku Kabushiki Kaisha

Other

Osaka Yuki Kagakuo Kogyo Kabushiki Kaisha

Chuzo Kato

Taiji Kambayashi

Kazuyuki Kuroda

Hiroyuki Kataoka

Hideyuki Mekata

Taiji Kanbayashi

Tadashi Okamoto

Yoshiaki Fukushima

Shinji Inagaki

Toru Sato

Akane Okada

Makoto Ogawa

Takanori Iwamoto

Shigeaki Matsumoto

Akane Okata

Yasuhiro Morita

A porous material composed of many SiO.sub.4 tetrahedra sheets having interlayer bridges of SiO.sub.2. It has pores having a diameter of 10 .ANG. or above, and possesses the properties of a solid acid formed by the isomorphous substitution of metal atoms for Si of SiO.sub.4 frameworks. It is made by a process including introducing an organic substance into interlayer space of crystals of layered silicates to expand the spacing between crystal layers, as well as forming bridges of SiO.sub.2 therebetween, bringing the intercalated compounds into contact with a metal salt to link metal atoms to the SiO.sub.4 frameworks, and firing the products. The material can withstand a temperature of 800.degree. C., has a pore diameter larger than that of zeolites, etc., and is useful in making an adsorbent or catalyst for molecules having a high molecular weight, such as a catalyst for the catalytic cracking of petroleum.

Porous material composed of layered silica and metal oxide and a process

A method for the production of water absorbent polymer beads which retain a bead like shape after the absorption of water, wherein the absorbent beads are used in the manufacturing of concrete/mortar.

Water absorbent polymer keeping absorbed water therein in the form of

Concrete/mortar is manufactured with a small amount of water by using fine polymer particles containing frozen water. The water becomes available when the particles thaw or the particles may be used directly without freezing.

Method for the production of fine grain ice and dry clathrate water for

A shaped article of gypsum possessing heretofore unattainable high strength, a method for the production of the shaped article, and a method for the production of inclusion water indispensable to the hardening by hydration of the production of the shaped article of gypsum are disclosed.

Method for production of inclusion water for hardening gypsum, method

Concrete/mortar is manufactured with a small amount of water by using a dry clathrate water mixture. The dry clathrate water is used in a state wherein the water is impregnated into a water absorbent polymer.

Method for the production of concrete/mortar by using dry clathrate

A process for preparing organic smectite applied for thickener, protective colloid, dispersant and binder. The present invention features the process for preparing the organic smectite by mixing smectite incluidng 0 to 20% by weight of interlayer water in the interlayer spaces of said smectite with organic cation-supplying substance selected from at least one of aliphatic alkylamine salts, aromatic amine salts and basic organic compound having pyridine nucleus, and/or basic organic molecule in a mixing ratio of the latter to the former of 10 to 500 milliequivalents per 100 g smectite, and stirring the resulting mixture at a temperature of 5.degree. to 50.degree. C. under an applied pressure of 0.5 to 10 kg/cm.sup.2 to cause a solid-solid reaction. By the process of the present invention, exchangeable organic cations and/or basic organic molecules as a guest substance are intercalated int he interlayer spaces of the smectite as a host substance, thus the hydrophilic smectite can convert to the organic smectite by a more simplified solid-solid reaction than a liquid-liquid reaction.

Process for preparing organic smectite by solid-solid reaction

A compound is disclosed which excels in thermal resistance and acidproofness, fits application on a surface and fabrication, and exhibits both photochromism and electrochromism.

Photochromic-electrochromic intercalation compound

This invention provides a method for the manufacture of a high-expansion type absorbent polymer by first causing an absorbent polymer which is obtained by polymerization of a monomer and is possessed of an alkali salt of acrylic acid as a component of polymer to be cross-linked at the time of azeotropic dehydration thereof with a cross-linking agent possessing two or more functional groups in the presence of an inorganic salt and subsequently drying the cross-linked polymer. By the method of this invention, there can be obtained a high-expansion type absorbent material which absorbs water quickly and forms a gel not viscid but permeable to gas. This absorbent material is highly advantageously used as absorbent for sanitary materials free from leaking water and as a water-retaining agent for agricultural applications hardly causing rotton plant roots.

Method for manufacture of high-expansion type absorbent polymer

Nitrides and carbides are prepared by intercalating a monomer, a starting material of condensate, or a prepolymer into the interlamellar spaces or the vacant spaces of the crystalline structure of a natural mineral or an inorganic compound to prepare an intercalated compound and baking the intercalated polymer compound at a temperature in the range of 1100.degree.-1700.degree. C. under a nitrogen or reducing atmosphere. The present invention provides a method for readily preparing nitrides and carbides having the increased crystallinity at a low calcination temperature. Whiskers with larger diameters of 2 to 5 .mu.m can be prepared by adding carbon powder to the intercalated compound complex.

Growing community of inventors

Tokyo, Japan

Chuzo Kato