Abstract: An electrically conductive composition is disclosed, which comprises a protonically conductive compound, a finely divided inorganic solid acid and a binder, especially an aqueous emulsion type carboxyl group-containing polymer.This composition has in combination highly improved electric conductivity, low humidity dependency, reduced tacking tendency and high whiteness and can be manufactured at a low cost. This composition is valuable for production of an electro-sensitive recording material.

Abstract: The magnetic recording medium of this invention contains in the binder a modified polymer prepared by graft-polymerizing a nitrogen-containing polymerizable unsaturated compound onto a polymer by irradiating with radiation to modify the polymer.The modified polymer used in this invention is produced by the graft-copolymerization utilizing the irradiation of radiation, the applicable range of polymers used for producing the modified polymer is wide and, thereby providing a large industrial value. Also, since the modified polymer used in this invention has a nitrogen-containing side chain, the modified polymer contributes to improve the dispersibility and packing properties of a magnetic powder in the magnetic layer. Accordingly, a magnetic recording medium having excellent magnetic characteristics and durability can be provided by this invention.

Abstract: An electrically conducting material including a cyanic group-containing material substrate and adsorbed sulfides of copper and an auxiliary metal selected from silver, gold and elements of the platinum group. The cyanic group-containing substrate may be in the form of powder or a shaped body such as a fiber, film, plate, rod or like suitable substrate include a synthetic polymers such as polyacrylonitrile and polyamides having cyanic groups; naturally occurring polymeric substances such as cotton having introduced thereinto cyanic groups; and low molecular weight compounds such as phthalonitrile. The electrically conducting material may be prepared by treating the cyanic group-containing substrate with (a) a source of monovalent copper ions, (b) a source of ions containing the auxiliary metal and (c) a sulfur-containing compound to form sulfides of copper and the auxiliary metal adsorbed by the cyanic group-containing material.

Abstract: An electrically conducting material including a polymeric material having adsorbed sulfides of a first metal selected from copper, cobalt, tin, mercury and of lead and a second metal selected from silver, gold and elements of the platinum group. The polymeric material is in the form of powder or a shaped body such as a fiber, film or string and is formed of a synthetic polymer without cyanic groups such as a polyester or a polyamide or a naturally occurring polymeric substance such as silk or wool. The electrically conducting material may be prepared by treating the polymeric material with hydrogen sulfide, and then treating the resultant material having adsorbed hydrogen sulfide with (a) a source of ions containing the first metal, (b) a source of ions containing the second metal and, optionally, (c) a sulfur-containing compound to form sulfides of the first and second metals adsorbed by the polymeric material.

Abstract: Polyacetal resin composition containing electrically conductive carbon black is improved in respect to stability to heat by incorporating thereinto an amide compound.

Abstract: An electrically conductive sintered ceramics of the present invention comprises, as the main ingredients thereof, (a) silicon carbide, (b) an inorganic compound which exhibits a positive resistance-temperature coefficient, and preferably (c) a sintering assistant. The electrically conductive sintered ceramics obtained exhibits a positive resistance-temperature coefficient as a whole.A ceramic heater of the invention makes use of the electrically conductive sintered ceramics in an electrically conductive portion thereof.A sintered product which exhibits a positive resistance-temperature coefficient helps to prevent the occurrence of thermal runaway or thermal destruction.

Abstract: Electrically conductive fillers obtainable by pyrolysis of a mixture of at least one metal phthalocyanine and at least one particular inorganic filler are suitable for the preparation of electrically conductive high molecular weight organic material or inorganic material.

Abstract: An electrically conductive block copolymer of polyisoprene and polyacetyl and a method of making the same are disclosed. The polymer is prepared by first polymerizing isoprene with n-butyllithium in a toluene solution to form an active isoprenyllithium polymer. The active polymer is reacted with an equimolar amount of titanium butoxide and subsequently exposed to gaseous acetylene. A block copolymer of polyisoprene and polyacetylene is formed. The copolymer is soluble in common solvents and may be doped with I.sub.2 to give it an electrical conductivity in the metallic regime.

Abstract: An aqueous composition has been developed to treat subterranean formations whereby the compositions can maintain for a period of time a sufficient viscosity to function as a hydraulic fluid and optionally to support particulate matter. Subsequently, the viscosity of the composition decreases to facilitate the removal of the composition.

Abstract: An electrically conductive resin composition comprising 15-35 parts by weight of a cyanate ester compound and 65-85 parts by weight of an electrically conductive powder selected from the group consisting of a copper powder, a copper alloy powder and a silver powder and mixtures thereof, the cyanate ester component content in the cyanate ester compound being more than 50% by weight in terms of monomer, characterized in that the composition contains 0.5-15 parts by weight of acetylacetone or its derivatives is disclosed. The electrically conductive resin composition is useful as a conductive ink.

Abstract: Thermoplastic polymers, having antistatic properties, are obtained by incorporating in the polymers a liquid mixture of trialkylphosphine oxides.

Abstract: An aqueous composition has been developed to treat subterranean formations whereby the compositions can maintain for a period of time a sufficient viscosity to function as a hydraulic fluid and optionally to support particulate matter. Subsequently, the viscosity of the composition decreases to facilitate the removal of the composition.

Abstract: An electrically conductive paste is disclosed, which comprises (i) 60 to 90 wt % of metal fine powders comprising a silver fine powder, a composite fine powder of silver and copper and optionally either, a composite fine powder of silver and platinum or a platinum fine powder, or a composite fine powder of silver and palladium or a palladium fine powder, the copper content in the metal fine powders is 0.1 to 10 wt %, the platinum content, if present, is 0.2-10 wt % and the palladium content, if present, is 0.2-30 wt %, and (ii) 10 to 40 wt % of a vehicle component, such as terpineol, butylcarbitol, ethyl cellulose etc. The product can resist thermal shocks and has strong bonding strength having remarkably improved heat deterioration characteristics.

Abstract: The present invention provides an electroconductive silicone elastomer composition comprising:(A) 100 parts by weight of a polydiorganosiloxane having an average degree of polymerization of 500 to 12,000, wherein each polymer molecule contains at least two vinyl groups bonded to silicon atoms;(B) 100 to 500 parts by weight of nickel-coated carbon;(C) 0.1 to 5 parts by weight of a polyorganohydrogensiloxane, and(D) 0.2 to 300 ppm based on the total amount of (A), (B) and (C) of platinum metal or platinum compound as platinum atom.

Abstract: Described is an electrode formed from a composition consisting essentially of a base resin polymer, carbon black and graphite, with adsorptive active carbon added thereto. The electrode is capable of suppressing halogen diffusion in the metal-halogen battery for improving its energy efficiency.

Abstract: The present invention provides a voltage-dependent resistor of the bulk-type in which zinc oxide (ZnO) powder and additives are admixed to form a sintered body composition having as the main constituent, zinc oxide, and in which the mixture is formed into a resistor body, the body is sintered, and electrodes are applied to the opposite surfaces of the sintered body, the improvement comprising the step of, prior to sintering and admixture with said zinc oxide, admixing all amount of boron oxide (B.sub.2 O.sub.3) with other additives in the form of a borosilicate glass, which is composed of 5 to 30 weight percent of boron oxide (B.sub.2 O.sub.3) and 70 to 95 weight percent of silicon oxide (SiO.sub.2). A process for the production of said resistor is also provided.

Abstract: A non-linear resistor having an operational field strength which optionally is formed as a VDR- or as an NTC-resistor having a ceramic sintered body on the basis of a polycrystalline alkaline earth metal titanate doped with a small quantity of a metal oxide so as to produce an N-type conductivity, in which the sintered body comprises at its grain boundaries insulating layers formed by re-oxidation of the sintered body and consists of an alkaline earth metal titanate having a Perowskite structure of the general formula(A.sub.1-x Ln.sub.x)TiO.sub.3.yTiO.sub.2 or A(Ti.sub.1-x Me.sub.x)O.sub.3.yTiO.sub.2,wherein: A=alkaline earth metal; Ln=rare earth metal; Me=metal having a valency of 5 or more; 0.0005<.times.<solubility limit in the Perowskite phase; y.times.0.001 to 0.02.

Abstract: A voltage limiting composition, actually a nonlinear resistor, especially suitable for use in a gapless surge arrester is disclosed herein. This composition includes a predetermined amount of zinc oxide as its primary ingredient and one or more specifically selected additives. All of these constituents are combined and sintered so that the composition displays a nonlinear exponent .alpha. at least equal to about 35 over the current range of 1 ma to 5000 amps and such that its energy absorption capability is at least equal to about 50 joules/cm.sup.3.

Abstract: Process of detecting the presence of certain gases, including certain pollutants, in small concentrations; or to cause partial polymerization of certain polyacetylene compositions for use in time/temperature history indicators or radiation dosage indicators. The process involves contacting a reactive gas, such as a nitrogen oxide, a halide or ozone, with a crystalline substituted acetylenic monomer containing at least two conjugated triple bonds and substituents having at least one atom of oxygen or nitrogen. In particular the acetylenic compound is 2,4-hexadiyne-1,6-bis(phenylurethane) crystallized from tetrahydrofuran or acetone.

Abstract: Thick film resistor composition which is a dispersion of (a) a conductive phase of a nonprecious metal pyrochlore and SnO.sub.2, (b) inorganic binder and (c) CoCrO.sub.4 and/or NiCrO.sub.4 in (d) organic medium. The metal chromate functions as a TCR driver.