Abstract: A sealing agent for film type liquid crystal displays including a bisphenol type epoxy resin, a non-bisphenol type epoxy resin and a crosslinking agent which includes at least one of an aromatic amine and an alicyclic amine, and a liquid crystal display using the sealing agent.

Abstract: A neodymium/iron/boron permanent magnet is provided with high corrosion resistance by forming a coating layer of a vitrified sodium silicate on the surface. The vitreous coating layer of sodium silicate is formed by coating the surface of the permanent magnet with an aqueous coating solution of water glass followed by drying of the coating layer and vitrification of the dried coating layer by a heat treatment under specified conditions. Characteristically, the thus formed vitreous coating layer of sodium silicate is subjected to a leaching treatment with water at a specified temperature for a specified length of time in order to remove away residual sodium content leachable in water so that the troubles due to absorption of moisture by the alkali constituent in the sodium silicate coating layer can be largely dissolved.

Abstract: Proposed is a cutting wheel bladed on the outer periphery of a base wheel with abrasive particles, e.g., particles of diamond and cubic boron nitride, suitable for cutting of a hard and brittle material such as a sintered block of a rare earth-based magnet alloy with good cutting accuracy and low material loss by cutting. The cutting wheel is an integral disk body consisting of a base wheel of a relatively small thickness made from a cemented metal carbide, e.g., tungsten carbide particles cemented with metallic cobalt, instead of conventional steel materials and a cutting blade formed on the outer periphery of the base wheel which contains from 10 to 80% by volume of the abrasive particles having a specified average particle diameter.

Abstract: A rare earth-based permanent magnet such as a neodymium-iron-boron permanent magnet, which is disadvantageous in respect of the low corrosion resistance, can be imparted with high corrosion resistance by providing the surface with a protective coating film of vitrified alkali metal silicate, e.g., sodium silicate, of which the SiO.sub.2 :(alkali metal oxide) molar ratio is in the range from 1.5 to 20. The vitrified alkali metal silicate-based protective coating film can be formed by coating the surface of the magnet with an aqueous coating solution containing sodium silicate to form a coating layer which is dried and subjected to a heat treatment at 50.degree. to 450.degree. C. to effect vitrification of the alkali metal silicate. The thickness of the thus formed protective coating film should be in the range from 5 nm to 10 .mu.m.

Abstract: An eyeball observing device comprising an illuminating optical system for illuminating a portin to be examined; a photographing optical system comprising an object lens group equipped with a transparent body which is designed to be in contact with the eyeball and an imaging lens group, the system allowing the image beams coming from the portion to be examined to reach an imaging surface; and a motion picture camera, wherein an ultrasonic oscillator for detecting the position of the examined eye is mounted on the transparent body. The device can provide a clear image of a desired portion of an eyeball quickly.

Abstract: An image display apparatus is disclosed which includes: an optical system including a light source and at least one projection lens; a display means for forming a display image, the display means including a non-luminescent display panel and a microlens array disposed on the light-incidence side of the display panel; and at least one projection lens for projecting the display image; wherein the display panel and the microlens array are combined with each other by means of an adhesive made of a transparent material. In cases where the microlens array is provided with color filters which are arranged so as to correspond to the microlenses of this array, the image display apparatus can provide a bright display of color images with an improved contrast. Moreover, when the display panel and the microlens array are combined with each other by means of an adhesive containing spacers, the image display apparatus has a high thermal reliability.

Abstract: A positively-chargeable single-layered type organic electrophotographic photoconductor composed of an electroconductive support and an organic single-layered photoconductive layer containing a charge generating material, an organic positive hole transporting material and an organic acceptor compound which are dispersed in a matrix binder agent, with the relationship of the oxidation potential (E.sub.ox) of the charge generating material.ltoreq.the oxidation potential (E.sub.ox) of the organic positive hole transporting material being satisfied.

Abstract: An electrophotographic photoconductor is composed of an electroconductive substrate, and a photoconductive layer formed thereon, which contains a charge generating material, and a vinylidene compound of formula (I): ##STR1## wherein Ar represents an aromatic group; and X represents cyano group, an alkyl group having 1 to 8 carbon atoms, or an alkoxycarbonyl group represented by --COOC.sub.n H.sub.2n+1, in which n is an integer of 1 to 8; or a vinylidene compound of formula (II):Ar--CH.dbd.C(COOR).sub.2 (II)wherein Ar represents an aromatic group; and R represents an alkyl group having 1 to 8 carbon atoms, which may form a ring in combination of two of the alkyl groups, each of these vinylidene compounds serving as a charge transporting material.

Abstract: Disclosed is a novel method for the preparation of a rare earth-based permanent magnet by the so-called two-alloy process in which powders of two kinds of rare earth-containing magnetic alloys each having a different composition from the other are blended together in a specified proportion and the powder blend is shaped in a magnetic field into a green body which is sintered. In the invention, the first magnetic alloy has a composition of the formula R.sub.2 T.sub.14 B, in which R is a rare earth element selected from the group consisting of neodymium, praseodymium, dysprosium and terbium and T is iron or a combination of iron and cobalt, while the second alloy has a composition of the formula R.sub.a Fe.sub.b Co.sub.c B.sub.d M.sub.

Abstract: An electrophotographic photoconductor is composed of an electroconductive support, and a photoconductive layer formed on the electroconductive support, which contains a charge generating material and a charge transporting material consisting of an .alpha.-cyanostilbene compound of formula (I): ##STR1## wherein R.sup.1 and R.sup.2 each represent a phenyl group, a polycyclic aromatic group selected from the group consisting of a naphthyl group, an anthracenyl group, a phenanthrenyl group, and a pyrenyl group, or a heterocyclic group selected from the group consisting of a pyridyl group, a furanyl group, and a quinolyl group.

Abstract: In one aspect, the present invention relates to polyimides having excellent thermal resistance and process for preparing the same comprising carrying out condensation of 4,4'-bis(3-aminophenoxy)biphenyl with pyromellitic dianhydride in the presence of a different diamine compound and optionally with a different tetracarboxylic acid dianhydride.In a second aspect, the present invention relates to a heat resistant resin composition consisting essentially of an aromatic polyetherimide and a defined polyimide.In a third aspect, the present invention relates to a polyimide resin composition comprised on a defined polyimide and a separate high-temperature engineering polymer.In a fourth aspect, the present invention relates to a resin composition comprised of a defined polyimide and an aromatic polyamideimide.

Abstract: In one aspect, the present invention relates to polyimides having excellent thermal resistance and process for preparing the same comprising carrying out condensation of 4,4'-bis(3-aminophenoxy)biphenyl with pyromellitic dianhydride in the presence of a different diamine compound and optionally with a different tetracarboxylic acid dianhydride.In a second aspect, the present invention relates to a heat resistant resin composition consisting essentially of an aromatic polyetherimide and a defined polyimide.In a third aspect, the present invention relates to a polyimide resin composition comprised on a defined polyimide and a separate high-temperature engineering polymer.In a fourth aspect, the present invention relates to a resin composition comprised of a defined polyimide and an aromatic polyamideimide.

Abstract: An image display apparatus is disclosed which includes: an optical system including a light source and at least one projection lens; a display means for forming a display image, the display means including a non-luminescent display panel and a microlens array disposed on the light-incidence side of the display panel; and at least one projection lens for projecting the display image; wherein the display panel and the microlens array are combined with each other by means of an adhesive made of a transparent material. In cases where the microlens array is provided with color filters which are arranged so as to correspond to the microlenses of this array, the image display apparatus can provide a bright display of color images with an improved contrast. Moreover, when the display panel and the microlens array are combined with each other by means of an adhesive containing spacers, the image display apparatus has a high thermal reliability.

Abstract: An electrophotographic photoconductor is composed of an electroconductive substrate, and a photoconductive layer, formed thereon, which contains a charge generating material, and a vinylidene compound of formula (I): ##STR1## wherein Ar represents a metallocene group; and X represents cyano group, an alkyl group having 1 to 8 carbon atoms, or an alkoxycarbonyl group represented by --COOC.sub.n H.sub.2n+1, in which n is an integer of 1 to 8; or a vinylidene compound of formula (II):Ar--CH.dbd.C(COOR).sub.2 (II)wherein Ar represents a metallocene group; and R represents an alkyl group having 1 to 8 carbon atoms, which may form a ring in combination of two of the alkyl groups, each of these vinylidene compounds serving as a charge transporting material.

Abstract: An organic photovoltaic element is composed of a first electrode, a first electron acceptor organic layer provided on the first electrode, a second electron acceptor organic layer which is different from the first electron acceptor organic layer, provided on the first electron acceptor organic layer, a first electron donor organic layer provided on the second electron acceptor organic layer, a second electron acceptor organic layer which is different from the first electron acceptor organic layer, provided on the first electron acceptor organic layer, and a second electrode provided on the second electron acceptor organic layer, at least one of the first electrode or the second electrode being transparent.

Abstract: A high dielectric polymeric optical recording medium for recording information by heating the portions of the recording medium corresponding to the information to be recorded by being exposed to a beam of light, followed by the application of a reverse electric field to the recording medium, thereby selectively reversing the polarity of the heated portions in the recording medium, is disclosed, which comprises a high dielectric polymeric recording layer containing a high dielectric polymeric composition comprising a high dielectric polymeric material and a nonionic dye serving as a light-absorption agent which is compatible with or dispersible in the high dielectric polymeric material.

Abstract: In one aspect, the present invention relates to polyimides having excellent thermal resistance and process for preparing the same comprising carrying out condensation of 4,4'-bis(3-aminophenoxy)biphenyl with pyromellitic dianhydride in the presence of a different diamine compound and optionally with a different tetracarboxylic acid dianhydride.In a second aspect, the present invention relates to a heat resistant resin composition consisting essentially of an aromatic polyetherimide and a defined polyimide.In a third aspect, the present invention relates to a polyimide resin composition comprised on a defined polyimide and a separate high-temperature engineering polymer.In a fourth aspect, the present invention relates to a resin composition comprised of a defined polyimide and an aromatic polyamideimide.

Abstract: An air heating apparatus such as a fan heater, a forced circulation type ware air heater, and, an air conditioner and heater, is operated while the amount of radiation is taken into consideration. Moreover, after a PMV value of the room to be heated is generated from the temperature, amount of radiation, etc. of the room to be heated, the burning amount, air flow and the like are controlled to make the PMV value 0.