Okura Kogyo Kabushiki Kaisha

Okura Industrial Co., Ltd.

Dai-ichi Kogyo Seiyaku Co., Ltd.

Okura Koygo Kabushiki Kisha

Okura Kogya Kabushiki Kaisha

Hideaki Matsuda

Takanori Okamoto

Minoru Ueda

Hisakazu Mori

Koichi Murakami

Takasi Saheki

Yoshihiro Tange

Hidemi Doi

Hidemi Dohi

Hideki Mori

Kunio Kanaoka

Kinya Yokota

Tominobu Mayuzumi

Masanori Hara

Takashi Saeki

Yutaka Matsumoto

Shinji Otoishi

Yuki Yamaguchi

Takaharu Onishi

A raw material composition for an extrusion moldable polyolefin resin composition including (a) a polypropylene resin, (b) a polyethylene resin, (c) an esterified cellulose material obtained by esterifying a cellulose material with a polybasic acid anhydride and having a content of the polybasic acid anhydride bonded thereto of 0.5-20% based on the weight of the cellulose material, and (d) an organic peroxide compound, wherein the weight ratio of (a) to (b) ranges from 30:70 to 80:20, wherein the weight ratio of a total of (a)&plus;(b) to (c) ranges from 30:70 to 70:30, and wherein (d) is present in an amount of 0.001 to 0.1% based on a total weight of (a)&plus;(b)&plus;(c). By kneading the raw material composition at 150-200&deg; C. for 0.5 to 30 minutes, a polyolefin composition for extrusion molding is obtained.

Polyolefin resin composition for extrusion molding and raw material composition therefor

A process for the production of silicon-containing ceramic whiskers is disclosed which includes the steps of:

Process for the production of silicon carbide or silicon nitride whiskers

A composite, molded article is prepared by forming a W/O emulsion containing a vinyl monomer, water, a cement, a polymerization initiator and an emulsifier, followed by molding and hardening. The emulsifier includes a neutralization product of an amide-containing amine with an organic sulfonic acid or an organic acid phosphate. The amide-containing amine is a condensation product obtained by reacting a fatty acid having 8-24 carbon atoms with an amino compound having the general formula (I) or (II):

Process for the production of cement-synthetic polymer composite molded

A process of producing a porous ceramic by mixing a ceramic powder, a polymerizable unsaturated compund, an emulsifying agent, and water with stirring to provide an inverted emulsion, radical-polymerizing or redox-polymerizing the polymerizable unsaturated compound in the inverted emulsion to cure the inverted emulsion, and, then, drying and firing the cured product thus obtained. The porous ceramics obtained by this invention are useful as filters, adsorbents, catalyst carriers, refractory heat insulating materials, sound absorbers and building materials.

Process of producing porous ceramics

The invention relates to a process of producing a surface hardened woody decorative sheet by reacting a cellulose material such as a wood flour, a wood chip, a chaff, etc., with a dibasic acid anhydride and a monoepoxy compound having a polymerizable double bond to form a setting composition mainly composed of an oligoesterified cellulose material having a polymerizable double bond and an oligomer having a polymerizable double bond, placing in layer the setting composition on a woody sheet, and hot-pressing them to integrate the setting composition and the woody sheet in a body.

Process of producing surface hardened woody decorative sheets

In the case of extruding a W/O type emulsion having a high viscosity obtained by stirring a mixture of a vinyl monomer solution composed of a vinyl monomer which is water insoluble and in a liquid state at normal temperature, a surface active agent having a hydrophilic-lipophylic balance of 3 to 6, and a polymerization catalyst with water, cement, and synthetic fibers through a die, at least one rectifying plate having a given form is disposed in the die near the outlet thereof to direct the synthetic fibers in the W/O type emulsion to the extruding direction. When the tabular plate obtained by extrusion-molding the W/O type emulsion by the method of this invention is hardened and dried, a light-weight and high-strength plastic concrete suitable for building materials is obtained.

Method and apparatus for extrusion molding fiber-and cement-containing

An industrially advantageous woody molding is produced by adding a dibasic acid anhydride to a woody material such as a wood meal in the presence or absence of a catalyst such as sodium carbonate, whereby the dibasic acid anhydride is bonded to the hydroxy group of the woody material to form an esterified woody material, adding thereto a compound having at least two epoxy groups in the molecule thereof, kneading well the mixture, and then heat and press molding the kneaded mixture at a temperature higher than 120.degree. C. and a pressure greater than 60 kg/cm.sup.2. The product thus obtained by the process of this invention has a smooth and lustrous surface, has good water resistance and dimensional stability, and also is excellent in mechanical strength and hardness.

Process for producing woody moldings

The process for producing a plastic-like cured woody molding, which comprises applying a pressure necessary for plasticizing at least a woody component at temperature of from 120.degree. C. to 180.degree. C. to a composition comprising (A) an oligoesterified woody material obtained by alternately adding a polybasic acid anhydride and a monoepoxy compound having unsaturated double bond to the hydroxy groups of a woody material and (B) an oligomer obtained from a polybasic acid anhydride and a monoepoxy compound having unsaturated double bond with the addition of (C) a radical polymerization initiator to simultaneously perform the plasticization and crosslinking by the polymerization of the unsaturated double bonds. The plastic-like cured woody moldings thus obtained have dense and glossy surfaces and are particularly excellent in dimensional stability, mechanical properties and heat distortion temperature.

Process for producing plastic-like woody moldings from dibasic acid

A process of producing modified wood by impregnating dried wood with a mixed solution composed of phthalic anhydride as a polybasic acid anhydride and epichlorohydrin as an epoxy compound at a mol ratio of 1:1 to 1:30 by dipping the wood in the mixed solution, withdrawing the impregnated wood from the mixed solution, and heating the wood to a temperature of from 60.degree. C. to 180.degree. C. to simultaneously adding phthalic anhydride and epichlorohydrin to the hydroxyl groups of the wood. By the process of this invention, excellent dimensional stability and weather resistance can be imparted to the wood while retaining the properties specific to the wood.

Process of producing modified wood

There are provided a radical polymerizing composition giving a cured resin having excellent elasticity which comprises a mixture of two or more kinds of monomethacrylic acid esters having specific structure at specific mixing ratio and organic peroxide, and more particularly an anaerobic liquid gasket having excellent sealing properties, pressure resistance and good storage stability which comprises these polymerizing composition, filler, anaerobic curing accelerator and stabilizer.

Radical polymerizing composition and anaerobic liquid gasket composed

A light-weight high-strength plastic concrete is obtained by mixing a nonionic surface active agent having a hydrophilic-lipophilic balance of 3 to 6, a vinyl monomer, and a cement slurry with stirring to form a W/O type emulsion, thereafter polymerizing the vinyl monomer and hardening the cement in the W/O type emulsion simultaneously. The plastic concrete obtained by the aforesaid process has a smooth surface and the appearance thereof is almost same as that of an ordinary cement concrete. The plastic concrete is also excellent in workability such as cutting, scraping riveting, etc.

Process for producing plastic concrete

A two part type acrylic adhesive composed of liquid I comprising an acrylate ester monomer, a polymer soluble in the acrylate ester monomer, and an organic peroxide and liquid II containing a hardening accelerator capable of hardening said liquid I by polymerization at a temperature lower than room temperature, wherein at least liquid I contains 0.005 to 0.1% by weight polyphosphoric acid.

Two part type acrylic adhesives

There is provided a modified two-part type adhesive composition comprising liquid I composed of an acrylic monomer, an organic peroxide, and, if necessary, a gelation stabilizer and liquid II composed of an acrylic monomer, a curing accelerator, and, if necessary, a gelation stabilizer, at least one of the liquids containing a modified nitrile rubber in an amount of 2 to 50% by weight, and said modified nitrile rubber having carboxyl groups and the carboxyl groups being bonded to a (meth)acrylic group-containing acid phosphate through partially a covalent bond and partially an ionic bond.

Modified two-part type adhesive composition

There is provided a novel acrylic two-part adhesive suitable for structural uses composed of a liquid I comprising an acrylic monomer and an organic peroxide and a liquid II comprising an acrylic monomer and a curing accelerator. At least one of the liquid I and II further contains a diene-elastomer, and the liquid I or both the liquids further contain an ion-containing unsaturated polyester. The unsaturated polyester is further characterized in that it has one or more polymerizable or copolymerizable double bonds and its remaining carboxylic group is neutralized with a metal compound, ammonia or an amine.

Two-part type adhesives

There is provided an anaerobic curing adhesives showing a quick curing property for not only active metals such as iron series metals etc., but also plated metals, comprising 100 parts by weight of anaerobically polymerizable monomers containing at least 10% by weight of a hydrophilic anaerobically polymerizable monomer capable of dissolving more than 0.5% by weight of water and following components (all parts are by weight) (a) to (d)

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Marugame, Japan

Hideaki Matsuda