A process for the preparation of a stable aqeuous ketone resin or ketone/aldehyde resin dispersions and a process for the production of surface coating binders. For this purpose, a melt or a highly concentrated solution of the ketone resin or ketone/aldehyde resin is dispersed in water in the presence of an organic protective colloid. These aqueous resin dispersions can be used, in combination wit...

PURPOSE:To protect the electrical property of an oxide superconductive film against an external effect by a method wherein a buffer layer formed of BaO, nSiO2 is provided between the oxide superconductive film and a substrate. CONSTITUTION:When a Y-Ba-Cu-O oxide film deposited on a silicon substrate 1 through a magnetron sputtering method is calcined in an oxidizing atmosphere at a temperature of ...

PURPOSE:To enable production of a paste capable of forming superconducting thick films, orienting the c-axis perpendicularly to the plate surface and exhibiting the high critical current density by calcining a starting raw material powder, forming a powder of a high Tc phase-containing superconducting compound oxide, forming the powder and wet pulverizing the resultant compact. CONSTITUTION:A star...

PURPOSE:To provide a readily producible oxide-based high-temperature superconducting ceramics having high critical temperature and stable superconducting characteristics, consisting essentially of rubidium, alkaline earth element, copper and oxygen. CONSTITUTION:This oxide-based high-temperature superconducting ceramics consists essentially of rubidium, an alkaline earth element, copper and oxygen...

PURPOSE:To make a ceramics show superconductivity at high temperature by blending a compound oxide having a superconducting composition of specific three kinds of oxides with a radioactive element compound comprising the same element to form perovskite crystal structure. CONSTITUTION:(A) A metallic compound oxide composition shown by the formula LaBaSrCu3O7-x, (B) a metallic compound oxide composi...

PURPOSE:To enable to allow the single crystal of a superconductive thin film to grow on a semiconductor substrate by preliminarily forming an amorphous superconductive thin film having a specific thickness on the semiconductor substrate on which the thin film grows. CONSTITUTION:For example, a semiconductor substrate 101 using a Si (100) surface is cleansed with an organic solvent and the natural ...

PURPOSE:To hold stable magnetic field current density for a long time by baking a glass-coated layer having a specific thermal expansion coefficient on a Y-Ba-Cu-O superconductor. CONSTITUTION:A Y-Ba-Cu-O sintered body A is covered with a glass coating layer B except an electrode C. A thermal expansion coefficient of this coated layer B is that at 50 to 160X10<-7>/ deg.C. The coated layer B is bak...

A servo control device comprises a motor and continuously acting friction device, which is coupled to the output shaft of the motor and arranged in a housing having an aperture through which the motor output shaft extends. The housing is mounted so as to float radially in a mounting which is provided for it in a casing. Resilient tongues are provided so as to act between the housing and the mounti...

It consists primarily of arranging seismic sensors (10) along the outer surface of the casing (2a, 2b) before being descended into a drilled well (1) and cementing the ring-shaped space so as to acoustically connect the sensors to the environmental formations.The sensors (10) and the transmission cables (11) which link them to the surface are secured to centering devices guiding the descent of the...

A follower steady rest (10) for grinding machines (5) for the cylindrical grinding of workpieces (34) by means of a grinding wheel (35) which can be fed in radially to the workpiece axis (14) has at least two jaws (21, 31) which can be placed against a surface (41) of the workpiece (14) at two points (6, 7) offset at a circumferential angle, and, furthermore, has drive means (29, 27) for the infee...

A process for the removal of heavy metal ions from water and means for effecting such removal. The process is based on the growth of the water fern Azolla in solutions of water which contain such ions. Heavy metal ions can be efficiently removed from aqueous solutions by passing these through biomass of Azolla in comminuted form. Such columns also are part of the present invention.

The present invention relates to a semipermeable membrane for separating fluids, comprising hydrophobic PVDF. The membrane is asymmetrical and is prepared with a succession of steps comprising: a) preparing a solution comprising PVDF and an organic solvent; b) treating this solution to form a preformed membrane; c) evaporating at least part of the solvent contained in the preformed membrane;...

A novel blowing agent masterbatch for the production of polystyrene foams contains from 30 to 80% by weight of plasticised polystyrene having a Vicat softening point of between 30 and 50 DEG C, from 20 to 70% by weight of a blowing agent based on solid organic acids and alkali metal (bi) carbonates, and optionally pore regulators.

A suspension of an anionic or nonionic water-soluble polymer in an aqueous solution of an inorganic ammonium salt is characterized in that the polymer comprises at least 15% of the total weight of the suspension, the ammonium salt has a multivalent anion, and the weight ratio of the ammonium salt to the water is at least 0.15.

Gegenstand der Erfindung ist die Verwendung wärmehärtbarer Reaktionsharzgemische aus Polyisocyanaten (a), Polyepoxiden (b) und Reaktionsinhibitoren (c), wärmeaktivierbaren Reaktionskatalysatoren (d) und gegebenenfalls Hilfs- und Zusatzmitteln (e) zur Herstellung von Mehrschichtformkörpern auf Polyamidbasis mit einer ausgehärteten Duromerschicht durch thermisches Aushärten der Reaktionsharzgemische...

The first invention relates to a polyarylene sulfide resin composition containing less than 30% by weight of a styrene-based polymer having mainly syndiotactic configuration, and a polyarylene sulfide resin composition comprising 100 parts by weight of the above composition and 1 to 500 parts by weight of a filler. The second invention relates to an oriented forming produced by stretching the mold...

Disclosed is an improved apparatus for producing metal powder by gas-atomizing method. The apparatus comprises a molten metal holding vessel (1) of bottomed cylinder shape, a molten metal discharging runner (2) installed at the bottom of the vessel, and a molten metal spraying device (4) having gas-jetting nozzles (42) in a spraying chamber (41) connected to the lower end of the runner; and is cha...

Microemulsions are provided in which the oil phase comprises a reaction product of an organosilicon compound having amino groups and an organosilicon compound having epoxy groups, wherein the reaction product has at least one amino group and two silicon-bonded -OR groups. A method for making the microemulsions which comprises reacting the two organosilicon compounds sufficiently to allow the react...

A fluid composition that is a solution of an associative polymeric thickener in a solvent system comprising water miscible polar organic solvent can be thickened by diluting the composition with water. It can also be thickened by volatilising the solvent. A prepasted wallcovering can be formed by spreading a coating of the fluid composition, at a low viscosity, on the back of the wallcovering and ...