Abstract: A process for the production of a varistor material having a nonlinear index (.alpha.) of at least 20, which comprises adding a manganese compound to zinc oxide; heating the obtained mixture in the form of a powder in the atomosphere at 1050.degree. to 1150.degree. C.; grinding the material to give a particle size of 150 mesh or below; molding the powder into a desired shape; and sintering the same at 1200.degree. to 1350.degree. C.; is disclosed.

Abstract: An improvement is described in microemulsion compositions containing an anionic detergent, one of the specified cosurfactants, a hydrocarbon ingredient and water which comprises the use of a water-insoluble odoriferous perfume as the essential hydrocarbon ingredient in a proportion sufficient to form either a dilute o/w microemulsion composition containing, by weight, 1% to 10% of an anionic detergent, 2% to 10% of cosurfactant, 0.4% to 10% of perfume and the balance water or a concentrated microemulsion composition containing, by weight, 18% to 65% of anionic and nonionic detergent, 2% to 30% of cosurfactant, 10% to 50% of perfume and the balance water which upon dilution with water will yield said dilute o/w microemulsion composition.

Abstract: An electrically conductive polyimide article having a polyimide matrix with carbon black and graphite particles uniformly dispersed therein.

Abstract: Improved silicone electrically conductive compositions can be prepared by using a polysiloxane which contains greater than 5 mole percent of the silicon atoms having an aromatic containing radical such as a phenyl radical attached, or having greater than 5 mole percent ethylenically unsaturated hydrocarbon radical such as vinyl radicals, or having greater than 5 mole percent aromatic containing radical such as phenyl and ethylenically unsaturated hydrocarbon radical such as vinyl radicals in combination, in combination with from 12.5 to 50 volume percent of the total composition of silver particles or particles having an outer surface of silver. The composition has an electrical resistivity of less than 1.times.10.sup.-2 ohm-cm and the electrical resistivity is stable to thermal aging.

Abstract: A two component adhesive composition which is curable by induction heating is provided. The presence of an effective amount of conductive carbon black along with an effective amount of an electromagnetic energy absorbing material such as iron oxide in the adhesive composition allows one to reduce the time for induction curing and/or allow the use of low frequency induction generators (less than or equal to 10 KHz) in the bonding of fiber reinforced engineering thermoset, thermoplastic materials and other plastics.

Abstract: A varistor material comprising two crystalline phases of ZnO and ZnMn.sub.2 O.sub.4, wherein Zn and Mn are present at such a ratio that 3 to 7% by mol of ZnO is contained per 100% by mol of ZnO+MnO and the nonlinear index (.alpha.) of the varistor properties is at least 10; and a process for the production of the same, which comprises adding a manganese compound to ZnO at such a ratio as to give a content of MnO, sintering the mixture at 1100.degree. to 1350.degree. C., and further annealing the obtained sintered material at a temperature lower than the sintering temperature by at least 50.degree. C. and higher than 1000.degree. C. are disclosed.

Abstract: The electrostatic coating is effectively conducted on a plastic article with use of an electrically conductive agent comprising a polyurethane and an electrically conductive filler such as inorganic fine powder and organic substances.

Abstract: An electroconductive powder composition of antimony-containing tin oxide with an outer layer of hydrous metal oxide having an isoelectric point in the range from about 5 to 9.

Abstract: A protective coating for application to steel reinforced concrete structures, comprising a liquid composition of elastomeric polymeric material having electrically conductive particulate matter evenly dispersed therein. A cathodic protection system embodying the coating comprises a moisture impervious membrane of elastomeric polymeric material having electrically conductive particulate material evenly dispersed therein, an electrically conductive grid embedded in the membrane or contiguous thereto, and direct current means connecting the grid electrically with the reinforcing bars.

Abstract: 3-n-dodecylthiophene-3-methylthiophene copolymers are novel compounds having repeating units represented by the formula, ##STR1## and repeating units represented by the formula, ##STR2## randomly and linearly arranged and possessing a weight average molecular weight in the range of 60,000 to 100,000. 3-n-dodecylthiophene-3-methylthiophene copolymer compositions are novel compounds obtained by doping the copolymers mentioned above with a dopant. The copolymer compositions are obtained by electrolyzing a solution which consists of a supporting electrolyte capable of releasing a dopant, 3-n-dodecylthiophene, 3-methylthiphene, and a solvent. The copolymers mentioned above is produced by reducing the product of the electrolysis.

Abstract: This invention relates to compositions of thermally stable electrically conductive substituted and unsubstituted polyanilines and to conductive articles formed from such compositions.

Abstract: Stable alkaline aqueous solutions of sodium tetraphenylborate.

Abstract: An electrically conductive alumina fiber which heretofore known only as electrically insulative is now provided, which comprises an aluminum oxide matrix, and a continuous phase of carbon in the aluminum oxide matrix, the continuous phase of carbon affording an electrically conductive property to the fiber. Also, a method of producing the alumina fiber is disclosed, comprising pyrolyzing a fiber of poly[(acyloxy)aloxane] having a formula ##STR1## wherein, R.sub.1 represents CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.3, R.sub.2 represents ##STR2## or other substituted aromatic group, in an inert atmosphere.

Abstract: This invention relates to electrically conductive and non-conductive forms of poly(heterocyclic vinylenes) and to solutions of same. Another aspect of this invention relates to novel precursor polymers which can be converted into the poly(heterocyclic vinylenes) of this invention.

Abstract: An electrochromic resin composition comprising (A) 100 parts by weight of a network comprising a crosslinked polymer containing 4,4'-diaminodiphenylmethane units in a form in which the amino groups in the formula are quaternized, and (B) 5 to 150 parts by weight of an electrolytic material uniformly dispersed in the network (A). The crosslinked polymer containing the units with the amino groups therein being in the quaternized state is useful as an electrochromic or photochromic material.

Abstract: A composition comprising a thermoplastic electroconductive resin matrix containing a multiplicity of reinforcing carbonaceous fibers, the improvement which comprises said reinforcing fibers comprising resilient shaped reforming elongatable non-linear non-flammable conductive carbonaceous fibers, the fibers having a reversible deflection ratio of greater than 1.2:1 and an aspect ratio (1/d) of greater than 10:1.

Abstract: A conductive coating composition containing solvents and 40-75% by weight of film forming binder and pigment in a pigment to binder weight ratio of about 1:100 to 100:100; wherein the binder contains(A) a hydroxy contain polyester resin and(B) an aminoplast crosslinking agent; wherein the electrically conductive pigment is a silica which is either amorphous silica or a silica containing material, the silica is in association with a two-dimensional network of antimony-containing tin oxide crystallites in which the antimony content ranges from about 1-30% by weight of the tin oxide and the composition forms a coating on a substrate that has a surface conductivity of at least 100 Randsburg units. The coating can be used on metal or plastic substrates.

Abstract: A copper powder for electroconductive paints comprising copper particles and an organic zirconate compound which has been applied as a coating on the surfaces of said particles and an electroconductive paint composition obtained from the copper powder for electroconductive paints. The organic zirconate compounds used in the present invention are an organic zirconate compound (RO).sub.x --Zr--(OR').sub.4-x having an easily hydrolyzable organic group and an organic group which is hardly hydrolyzable and exhibits lipophilicity or a mixture of a zirconium acylate polymer and a higher carboxylic acid ester.

Abstract: Particulate vinyl resin mixed with a liquid premix of carbon black, plasticizer, etc. provides surface resistivities of 10.sup.4 -10.sup.9 ohm/sq. with as little as 0.2 to 5% by weight carbon black in fused sheets or films useful for conductive flooring or wrapping. Overcoating with a plastisol before fusion provides a smooth surface without loss of static dissipative properties. Conductive TiO.sub.2, Sb/SnO.sub.2, organic titanates, dispersions of carbon black and titanium dioxide, di-2-ethylhexyl phthalate, epoxidized soybean oil, polyethylene glycol and organic stabilizer are useful for preparing PVC resin compositions.

Abstract: Composite material composed of conducting and semi-conducting oxide partis, fibers, or flakes suspended in a of polymeric material matrix for use in connectors, junction boxes, enclosures or similar electromagnetic shielding applications. The use of a composite material with electromagnetic shielding properties built into the material itself, combined with the use of a semi-conductive filler that minimizes the corrosive effect of an electrochemical potential difference, provides EM shielding and corrosion resistance for these materials when they are used in marine and aircraft environments. Oxide semiconductor materials and compatible conductive fillers also provides a basis for a new class of EMI and EMP composite materials that exhibit a stable current-controlled and voltage-controlled negative resistance (VCNR, CCNR) characteristic. Testing has shown that the conductivities of these materials increase as the field and/or the voltage increases.