Abstract: A method of producing a silicon nitride powder includes heating an amorphous Si—N(—H)-based compound in which assuming that the specific surface area is RS (m2/g) and the oxygen content ratio is RO (mass %), RS/RO is 500 or more, at a temperature rising rate of 12 to 100° C./min in a temperature range from 1,000 to 1,400° C. while flowing the compound by a continuous firing furnace.

Abstract: A practical novel phosphor material composed of an ?-type silicon nitride, i.e., an ?-type silicon nitride phosphor containing a fluorescence-emittable element throughout an ?-type silicon nitride particle from the surface to the inside, is provided. Portions having a high emittable element concentration are preferably present like islands, and the fluorescence-emittable element is preferably a lanthanide metal. A powder composed of a fluorescence-emittable element is added to silicon diimide (Si(NH)2) or an amorphous silicon nitride powder obtained by thermally decomposing silicon diimide (Si(NH)2), the powders are mixed, and the mixture is fired in a non-oxidizing atmosphere, whereby the phosphor material is obtained.

Abstract: A multilayer tube including at least three layers including a layer (a) formed of (A) polyamide 11 and/or polyamide 12, a layer (b) formed of (B) a polyamide (semi-aromatic polyamide) including a dicarboxylic acid unit containing a terephthalic acid and/or naphthalenedicarboxylic acid unit in a proportion of 50 mol % or more based on all dicarboxylic acid units, and a diamine unit containing an aliphatic diamine unit having a carbon number of 9 to 13 in a proportion of 60 mol % or more based on all diamine units, and a layer (c) formed of (C) a fluorine-containing polymer having introduced into the molecular chain thereof a functional group having reactivity with a polyamide-based resin, is provided as a multilayer tube excellent in an alcohol gasoline permeation-preventing property, interlayer adhesion, low-temperature impact resistance, heat resistance and chemical resistance.

Abstract: A modified polyimide resin favorably employable for manufacturing an insulation film of an electric-electronic device is composed of recurring units (I) derived from a biphenyltetracarboxylic acid compound, a diamine compound, and a monoamine compound having at least one hydroxyl group and recurring units (II) derived from diisocyanate and polybutadiene having hydroxyl group at each terminal, which optionally contains further recurring units (III) derived from diisocyanate and a compound having hydroxyl group at each terminal and further having a reactive substituent.

Abstract: The present invention is to provide a process for producing a tetrahydropyranyl-4-sulfonate which comprises allowing 3-buten-1-ol which is easily available to react with a formaldehyde compound and an organic sulfonic acid, and a process for producing a 4-aminotetrahydropyrane derivative, which is industrially useful, under mild conditions and by a simple and easy method to produce the 4-aminotetrahydropyrane derivative in high yield.

Abstract: A polyimide-based insulating film composition comprising (a) 100 parts by weight of an organic solvent-soluble polyimidosiloxane obtained from a tetracarboxylic acid component and a diamine component comprising 45 to 90 mole percent of a diaminopolysiloxane represented by the following general formula (1): H2N—R1—[Si(R2)2—O—]n1—Si(R2)2—R1—NH2  (1) 0.5 to 40 mole percent of a polar group-containing aromatic diamine and 0 to 50 mole percent of an aromatic diamine with plural benzene rings, (b) 2 to 40 parts by weight of a polyvalent isocyanate and (c) an organic solvent. The composition has satisfactory storage stability and printing properties, while its cured films exhibit solvent resistance, with both heat resistance and flex resistance.

Abstract: A non-aqueous electrolyte comprising a non-aqueous solvent and a lithium salt dissolved therein, and a cyclic carbonate, linear carbonate, and vinylene carbonate having a chlorine content of 100 ppm or less, and a lithium secondary battery using the same.

Abstract: A molding polyamide resin composition with excellent weld strength is disclosed which comprises: 100 parts by weight of a polyamide resin comprising from 95 to 55 wt % crystalline, partly aromatic copolyamide resin containing one kind of aromatic monomer units and/or crystalline aliphatic polyamide resin and from 5 to 45 wt % polyamide resin comprising units derived from a xylylenediamine and units derived from an aliphatic dicarboxylic acid or noncrystalline, partly aromatic copolyamide resin containing at least two kinds of aromatic monomer units; and from 5 to 200 parts by weight of an inorganic filler.

Abstract: A novel ceramic composite of a solidified body consisting of at least two crystal phases of oxides selected from metal oxides and complex metal oxides, except for the Al.sub.2 O.sub.3 /Y.sub.3 Al.sub.5 O.sub.12 combination.

Abstract: An injection control method for an injection molding machine uses a step of filling a molten resin into a mold with an injection screw incorporated in a heating cylinder while changing an injection speed of the injection screw at a plurality of positions, and a dwell pressure application step of applying a pressure into the mold after filling. A predetermined filling pressure for determining a closing degree of a check valve is preset. The filling step includes comparing stroke information concerning an actual position of the injection screw with information concerning a reference position of the injection screw when one of pieces of information concerning a filling pressure, that changes in the filling step, reaches the predetermined filling pressure, and adjusting a subsequently performed change operation based on a difference between two pieces of information.

Abstract: A diecasting apparatus is mainly composed of: a mold unit having a movable mold and a stationary mold both of which have mold cavities in the meeting surfaces thereof and, also having an inlet formed at a lower portion of the mold unit and a vertical passage extending from the inlet upward to the mold cavity, and further having a sleeve connected to the inlet and thus communicating with the mold cavities through the inlet and the passage; and a supplying unit for supplying molten metal into the sleeve. A supplying passage is provided in the stationary mold, and has one of its openings at the inner surface of the inlet of the vertical passage, and communicates with the outside of the stationary mold. A duct connects the supplying passage and the supplying unit. A molten-metal heater is provided on the duct. A valve mechanism for opening and closing the supplying passage is composed of a valve seat and a valve.

Abstract: A lower alcohol, for example, ethyl alcohol, is recovered from a reaction mixture resulted from a reaction of catechol with a lower alcohol in such a manner that the reaction mixture is distilled and separated into a distilled light vapor fraction comprising non-reacted lower alcohol and water and a residual fraction comprising a reaction product and non-reacted catechol; the distilled light vapor fraction is further distilled and separated into a distilled vapor fraction comprising the lower alcohol in an increased concentration and a residual water fraction; the distilled vapor fraction is fed to a gas-separating membrane module which allows water vapor to selectively permeate therethrough, and separated into a non-permeated fraction which comprises the lower alcohol in a high concentration, which is left in the feed side of the membrane, and a permeated fraction which comprises water in a high concentration, which is returned from the delivery side of the membrane to the further distilling step, and the no

Abstract: A fiber-reinforced rubber composition capable of providing a vulcanizate having an excellent strength and modulus and a production process thereof. This fiber-reinforced rubber composition includes fine short fibers of thermoplastic polymer having ##STR1## groups buried in vulcanizable rubber. The vulcanizable rubber and the thermoplastic polymer are grafted to each other through a resol type alkylphenol formaldehyde resin precondensate or a novolak type phenol formaldehyde resin precondensate at an interface of the fiber. The ratio of the fiber to the vulcanizable rubber (A) 1 to 70 parts by weight based on 100 parts by weight of the rubber in the case of the resol type alkylphenol formaldehyde resin precondensate or (B) 1 to 100 parts by weight based on 100 parts by weight of the rubber in the case of the novolak type phenol formaldehyde resin precondensate.

Abstract: An apparatus to be applicable as a boiler for incinerating wet refuse in a combustion chamber with a fluid and heat medium of solid particles fluidized by an air feed to form a fluidized bed, with the aid of combustion of auxiliary fuel effected below the fluidized bed, is provided with additional one or more adjacent upper fluidized fed chambers in series to have the wet refuse dried and partially incinerated in the lower primary fluidized bed chamber with the balance of the refuse in a form of unburnt carbon particles being forced to fly upward into the additional upper fluidized bed chambers and be incinerated therein. Heat recovery is carried out from a topmost fluidized bed chamber.

Abstract: In an injection method of a die casting machine of the invention, an inner portion of a billet, excluding peripheral and bottom portions thereof, is melted in advance. The billet with the molten inner portion is supplied into an injection sleeve. The injection sleeve is then externally heated to melt the entire portion of the billet. The molten metal is injected into a die cavity.

Abstract: A two fluidized bed type boiler comprises: an upstream combustion zone forming a fluidized bed of sand in which pulverized coal is burnt with air fed as a fluidizing gas; a downstream desulfurizing zone forming a fluidized bed of particulate limestone with flue gases stemming from the combustion zone as fluidizing gases; and an intermediate dust collecting zone, in which a baffle plate facing the combustion zone and extending downwards is provided, is arranged between the upstream and downstream zones to form a single and unitary passage for a flow of the flue gases over the three zones.

Abstract: In a method of feeding a molten metal in metal molds through a casting sleeve to cast a predetermined article, a hollow thin-plate body is provided to at least an inner wall surface portion of the casting sleeve near the molds.

Abstract: An aromatic polyimide laminate sheet having a relatively large thickness of 50 .mu.m or more comprises (1) at least one first film layer comprising a polymerization-imidization product of an acid component containing 80 to 100 molar % of at least one biphenyltetracarboxylic acid with an amine component containing 80 to 100 molar % of at least one aromatic diamine having two or more benzene rings, and having a glass transition point of 250.degree. C. to 350.degree. C.; and (2) at least one second film layer comprising an aromatic imide polymer, the first and second film layers being alternately laminated on and directly bonded to each other without using bonding material.

Abstract: A molten metal pouring device of the type having a stationary cover die and a movable rejector die which, when joined and held securely together in the horizontal direction, define a die cavity, a reduced-diameter restricted portion in communication with the bottom of the die cavity and an enlarged-diameter vertical bore in communication with the lower end of the reduced-diameter restricted portion; a vertical pouring sleeve for containing molten metal to be forced into the die cavity; and a plunger capable of vertically reciprocating in the vertical pouring sleeve to force the molten metal into said die cavity, characterized in that a stepped portion is formed in the inner wall surface surrounding the vertical bore.

Abstract: A polyamide adhesive composition comprising 100 parts by weight of a polymer component and 0.1 to 5 parts by weight of an aminosilane compound. The polymer component comprises 50 to 99.5% by weight of a polyamide and 0.5 to 50% by weight of a modified polyolefin formed by grafting a polyolefin with an unsaturated compound having a polar group in the molecule and/or a polymer other than polyamides, having a polar group or an aromatic group and a tensile modulus not higher than 2,000 kg/cm.sup.2. A laminate comprising a metal material laminated on at least one surface of an adhesive layer composed of the polyamide adhesive composition exhibits high gasoline resistance, high heat resistance, and high T-peel strength.