Abstract: An epoxy resin composition which is cured transparent product having high neutron shielding capability, comprised by an epoxy resin without any not transparent inorganic substances and a hardener and characterized by said composition's viscosity at ambient temperatures is below 7000 mPa·s and said composition is curable at said temperatures.

Abstract: In the case where a carbon steel shell and tube type reactor is used and, for example, ethylene is subjected to catalytic gaseous oxidation to manufacture ethylene oxide, if rust is formed on the internal surface of the tubes, impurities such as aldehydes are formed. The cause of formation of the rust is that when the catalyst in the reactor is exchanged, dew is formed on the internal surface of the tubes. The present invention provides, as a method for preventing the rust formation, a method which comprises, in conducting the catalyst exchange work, maintaining the temperature of the internal surface of the tubes higher than the dew point at the work atmosphere (for example, filling the shell side with water and maintaining the temperature of the water higher than the temperature of the atmosphere).

Abstract: The present invention is a coated nucleus for a cultured pearl whose surface is coated with water soluble polymer, characterizing over 25% of total coated amount of said water soluble polymer is dissolved by soaking said coated nucleus into seawater of 15° C. temperature for 30 minutes.

Abstract: A reaction for producing (metho)acrolein and (meth)acrylic acid by vaporn-phase oxidation of at least a compound selected from propyl-ene, isobytylene, t-bytanol and methyl-t-butyl ether. For the process Complex oxide catalysts represented by the formula, MoaWbBicFedAeBfCgDhEiOx (in which A is Ni or Co; B is Na, K, Rb, Cs or Tl; C is an alkaline earth metal; D is P, Te, Sb, Sn, Ce, Pb, Nb, Mn, As, B or Zn; E is Si, Al, Ti or Zr; and where a is 12, 0≦b≦10, 0<c≦10, 0<d≦10, 2≦e≦15, 0<f≦10, 0≦g≦10, 0≦h≦4 and 0≦i≦30) are provided. The catalysts are characterized in that the molar ratio of the total nitrate anions to the molybdenum at the time of catalyst preparation is more than 1 but not more than 1.8.

Abstract: The tank type container of the present invention comprises a long, horizontally placed, drum-shaped tank 3 and a parallelopiped container frame 5 surrounding the tank 3. The tank 3 is provided with a charging tube 20 at the top of the longitudinal front end, a discharging tube 21 at the bottom of the longitudinal back end, and, at the outside, an air-supplying apparatus for supplying compressed air into the tank to discharge polycarbonate resin pellets. The tank 3, the charging tube 20, the discharging tube 21 and the air-supplying apparatus are accommodated in a space surrounded by the container frame 5. The container frame 5 is provided with metal fitting members 6 for locking engagable with a locking mechanism possessed by the bed of a trailer. Therefore, the present tank type container is usable as a large-capacity container for land transportation and sea transportation, allowing for improved efficiency in transportation of polycarbonate resin pellets.

Abstract: A resin composition which comprises 100 parts by weight of a synthetic resin and 50 to 1,500 parts by weight of magnesium oxide particles, wherein the magnesium oxide particles satisfy the following requirements (i) to (v): (i) an average secondary particle diameter of 0.1 to 130 &mgr;m, (ii) a BET method specific surface area of 0.1 to 5 m2/g, (iii) a total content of an Fe compound and an Mn compound of 0.01 wt % or less in terms of metals, (iv) an Na content of 0.001 wt % or less, and (v) a Cl content of 0.005 wt % or less, and a molded product formed therefrom. Since the resin composition of the present invention has excellent flame retardancy, heat conductivity and water resistance, it is advantageously used as a material for sealing a heat generating electronic member such as a semiconductor.

Abstract: A vibration-damping thermoplastic resin composition comprising (a) 50 to 90 wt % of an amorphous thermoplastic resin (component A) having a loss tangent (tan &dgr;) value of 0.01 to 0.04 and a deflection temperature under load of not lower than 120° C. and (b) 50 to 10 wt % of a methyl methacrylate resin (component B), wherein an article molded from the resin composition has the following physical properties (1) to (4), i.e., (1) a loss factor of 0.04 to 0.08, (2) a water absorption of not higher than 0.30 wt %, (3) a specific gravity of 1.05 to 1.3, and (4) a deflection temperature under load of 110 to 170° C.; and an article molded therefrom. According to the present invention, a thermoplastic resin composition and an article molded therefrom which are excellent in vibration dampability as well as dimensional accuracy, rigidity and heat resistance and are light in weight, is provided.

Abstract: The present invention provides a process for manufacturing an molded article that involves the occurrence of reduced number of gels and less corrosion of the molding equipment in high-temperature molding, particularly extrusion molding onto such substrate as paper; an extruded article; and an olefin polymer composition suitable therefor. The olefin polymer composition comprises an olefin polymer containing 5 to 200 ppm of aluminum, as aluminum atom, 0 to not more than 1,000 ppm of a phenolic stabilizer and 50 to 2,000 ppm of a phosphoric stabilizer.

Abstract: A highly refractive coating composition which can be stably preserved without losing the initial properties even after preserved for extended periods of time. The coating composition contains a metal oxide, a polymerizable alkoxysilane compound, a polymerization catalyst, an acidic aqueous solution and a solvent, wherein an organoamine compound is contained in an amount of from 0.05 to 1.3% by weight with respect to the metal oxide. A method of producing the coating composition comprises mixing a metal oxide suspension containing an organoamine compound in an amount of not smaller than 1.3% by weight with respect to the metal oxide, a polymerizable alkoxysilane compound, a polymerization catalyst, an acidic aqueous solution and a solvent, wherein the organoamine compound is removed so that the amount thereof is from 0.05 to 1.3% by weight with respect to the metal oxide contained in said metal oxide suspension.

Abstract: A one-pack preparation of irrigating solution for ocular surgery of cataract, glaucoma or intraocular lens transplantation, which is excellent in the protection of ophthalmic tissues and endothelial cells during and after the operation and has a high in vivo stability. The preparation comprises an aqueous solution containing at least one compound selected from D-3-hydroxybutyric acid and water-soluble salts thereof, at least one compound selected from water-soluble bicarbonates, phosphoric acid and water-soluble phosphates, a water-soluble calcium salt, and a water-soluble magnesium salt.

Abstract: Here is provided a process capable of efficiently carrying out a gas-phase dehydration reaction comprising contacting a raw material gas with a solid oxide catalyst containing an alkali metal element to allow reaction to progress by inhibiting decomposition of the raw material and the objective product. This process comprises using a sintered oxide comprising an alkali metal element and silica and/or alumina as a loading material for preheating of the raw material gas and/or as a supporting material for fixation of the position of the catalyst.

Abstract: An image-forming apparatus for forming an image by electrically charging a photosensitive material, forming an electrostatic image through the exposure to light and developing the electrostatic image, wherein the main charged potential, Vo, of the photosensitive material, the potential, Vr, of the exposed portion of the photosensitive material and the developing bias potential DB are so set as to satisfy the following formulas, V1≦|DB−Vr|≦V2  (1) V3≦|Vo−DB|≦300  (2). V1, V2 and V3 are parameters calculated from a developing characteristics curve obtained by plotting the image densities to a potential difference between the developing bias potential and the surface potential, 0 V, of the photosensitive material when the image is formed by changing the developing bias potential with the exposure amount being zero in a state where the potential on the surface of the photosensitive material is maintained at zero.

Abstract: A photo-catalyst comprising RuO2-loaded A2XnOm or RuO2-loaded BXnOm (wherein A is an alkali metal atom, B is an alkali earth metal atom or Zn, X is a metal ion with d10 configuration, n=m/2 or n=m/3 and n is 2), and especially relates to a photo-catalyst for complete photo decomposition reaction of water.

Abstract: Improved catalyst for use in production of methacrylic acid by vapor phase oxidation reaction and/or vapor phase oxidative dehydrogenation reaction of at least one compound selected from methacrolein, isobutylaldehyde and isobutyric acid is provided. This improved catalyst is a composition composed of (A) complex oxide containing as essential components molybdenum and phosphorus, which is per se known as a catalyst for the above reaction(s), and (B) complex oxide containing as essential components cerium and zirconium. When this improved catalyst is used, the operation for producing methacrylic acid can be stably continued over prolonged period.

Abstract: A photochromic compound which by itself develops a color tone of a neutral tint, exhibits a large fading rate and offers a good photochromic light resistance.

Abstract: Bacillus sp. NTAP-1 having been deposited under accession number FERM BP-6926; and a collagen-decomposing enzyme produced by bacterium. The above enzyme (1) has a capability of hydrolyzing, at the highest efficiency, collagen and gelatin from among casein, gelatin, albumin and collagen; (2) shows the optimum pH of 3.5 to 4.5; (3) shows the optimum temperature of 65 to 70° C.; (4) after heating at 60° C. at pH 6.0 for 4 hours, sustains an activity amounting to 60% or more of the level before the heat treatment; (5) remains stable at pH 3 to 6; and a molecular weight of approximately 46,000 when measured by SDS-PAGE.

Abstract: Provided is a process for producing acrylic acid stably at a high yield over a long period of time by subjecting acrolein or acrolein-containing gas to catalytic vapor phase oxidation. The above process is characterized by controlling the reaction so that the following equations (1) and (2) are satisfied: 1° C.≦T0−T1≦15° C.  (1) T1<T2  (2) wherein T0 represents a temperature of acrolein or the acrolein-containing gas in an inlet of a catalyst layer; T1 represents a temperature in an inlet part of the catalyst layer; and T2 represents a temperature in an outlet part of the catalyst layer.

Abstract: A method of preparing carboxylic acid derivatives comprising mixing a quaternary ammonium salt having a particular triazine ring in the molecules thereof, a carboxylic acid compound and a compound having a nucleophilic functional group, to condense the carboxylic acid with the compound having the nucleophilic functional group. The invention further provides a condensing agent comprising the quaternary ammonium salt. The condensation is conducted under mild conditions to form carboxylic acid derivatives and, particularly, amide compounds or ester compounds maintaining high yields.

Abstract: A novel method for preparing a heteropolyacid catalyst containing a heteropolyacid composed of molybdophosphoric acid and/or molybdovanadophosphoric acid, or a salt of the heteropolyacid, is provided. The method comprises preparing an aqueous solution or aqueous dispersion which (1) contains the nitrogen-containing heterocyclic compound, nitrate anions and ammonium ions, (2) the ammonium ion content not exceeding 1.7 mols per mol of the nitrate anion content, and (3) the ammonium ion content not exceeding 10 mols per 12 mols of the molybdenum atom content by mixing raw materials containing the catalyst-constituting elements with the nitrogen-containing heterocyclic compound in the presence of water, drying and calcining the same. This heteropolyacid catalyst excels over conventional catalysts in performance, life and strength.

Abstract: A shock-absorbing material composed of an expansion-molded article of polypropylene resin particles is excellent in shock-absorbing property and impact resilience compared with shock-absorbing materials composed of other resin materials, but has not been said to be satisfactory in stiffness and energy absorption efficiency. The present invention relates to a shock-absorbing material composed of an expansion-molded article produced by using foamed particles comprising, as a base resin, a polypropylene homopolymer obtained by using a metallocene polymerization catalyst. The base resin has a tensile modulus of at least 15,000 kgf/cm2, and the expansion-molded article has a crystal structure that an inherent peak a and a high-temperature peak b appear as endothermic peaks on a DSC curve obtained by the differential scanning calorimetry of the molded article.