Abstract: An electrode supporting conduit tube for electrical heating of underground hydrocarbon resources comprises a metal conduit tube and an insulating member adhered on and around the outer peripheral surface of the metal conduit tube. The insulating member is a laminated body of a web of glass fiber impregnated with water-dispersion varnish of a hot-water resistant and thermoplastic resin and a polyether/ether/ketone resin film, which is formed by first alternately winding the glass fiber web and the resin film on and around the outer peripheral surface of the metal conduit tube for a plurality of winding turns, and then subjecting both polyether/ether/ketone resin film and glass fiber web thus wound on and around the metal conduit tube to shaping under heat and pressure at a heating temperature of from 350.degree. C. to 450.degree. C, and under a pressure of from 10 kg/cm.sup.2 to 200 kg/cm.sup.2.

Abstract: An insulating pipe joint is disclosed. The joint comprises a first tubular member, a second tubular member comprising a cylinder having the same inside diameter as that of the first tubular member and an annular metal stopper at one end of said cylinder, and an insulator made of a glass/mica composition and a cured organic, solventless resin. The annular metal stopper has an inside diameter larger than the outside diameter of the first tubular member, and the annular metal stopper nests the first tubular member with a space left between them. The insulator fills the space to hold the first and second tubular members in position and provide air- and water-tightness, and secures the insulation creeping distance between each tubular member.

Abstract: A hydrophilic modified diene polymer material is produced by the steps of epoxidizing a diene polymer material consisting of at least one member selected from rubber polymers which have a molecular weight of 10,000 or more and contain an 85 molar % of more 1,4-addition structure based on the entire molar amount of double bonds contained therein, and crystalline 1,2-polybutadiene polymers which have a melting point of from 60.degree. C. to 170.degree. C., and a reduced viscosity (nsp/c) of 0.2 or more determined in a tetrahydronaphthalene solution in a concentration of 200 mg/100 ml at a temperature of 100.degree. C.

Abstract: A thin insulating sheet comprises an associated mica sheet containing 1 to 9 wt. % of a polymer fibril which is melt-bonded to a polymer film or a porous polymer sheet and impregnated with a resin in a prepreg form.

Abstract: A thin insulating sheet comprises an associated mica sheet containing 1 to 9 wt. % of a polymer fibril which is melt-bonded to a polymer film or a porous polymer sheet.

Abstract: An epoxy resin composition for flexible products having excellent electrical and mechanical characteristics and having long pot-life is provided by incorporating (A) a liquid epoxy compound having 2 or more epoxy groups in one molecule, (B) an acid anhydride type hardener and (C) a reaction product obtained by reacting a phenoxy resin or a high molecular weight epoxy resin with a monohydric alcohol glycidyl ether and a metal salt of carboxylic acid.

Abstract: This invention relates to an epoxy resin composition suitable for impregnating coils of electrical apparatus such as motors, generators and the like. More particularly, this invention relates to an epoxy resin composition having excellent workability and a long pot life, which composition is prepared by adding the reaction product of the glycidyl ether of a monoalcohol and a metal carboxylate, which works as a reactive diluent and accelerator, to an epoxy resin having at least two epoxy groups per molecule and containing a curing agent.

Abstract: A copper alloy having a gold color and being particularly suitable for restorative dentistry and consisting essentially of copper, zinc and a small amount of zirconium. Other additions may be included in the alloy.

Abstract: An apparatus for diluting gas. The apparatus has a primary passage having at opposite ends an inlet for component gas and an inlet for a diluent gas, a secondary passage for collecting the mixture of the component gas and the diluent gas, and a plurality of gas pressure reducing tubes each having the same structure for reducing the pressure of gas flowing therethrough by the same amount and which are connected in parallel between the primary passage and the secondary passage.