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 process for preparing an insulated product comprises forming an electrodeposited layer having high inorganic powder content by dipping a substrate in an electrodeposition varnish prepared by admixing an inorganic powder with a water dispersion varnish and electrodepositing the inorganic powder, and impregnating an organic or inorganic insulation varnish into the spaces of the electrodeposited layer.

Abstract: A water dispersion varnish suitable for electrodepositon is prepared by a process comprising reacting:The reaction product ofA. a polyesterimide having a carboxyl group in its chain or at the terminus of the chain and having an ester group and an imide group in its repeating unit or a polyesteramideimide having a carboxyl group in its chain or at the terminus of the chain and having an ester group, an imide group and an amide group in its repeating unit andB. an organic compound having at least two hydroxyl groups withC. a polybasic acid or its anhydride in the presence or absence of a solvent yielding a modified polyesterimide or polyesteramideimide;Dissolving said modified polyesterimide or polyesteramideimide in an organic solvent;Dispersing said modified polyesterimide or polyesteramideimide solution in an aqueous solution containing a surfactant and a volatile base; and removing the volatile components.

Abstract: Acrylonitrile, an acrylic ester such as ethyl acrylate, n-propyl acrylate, n-butyl acrylate, isopropyl acrylate, n-hexyl acrylate and the like are copolymerized with a cross-linkable monomer, an unsaturated organic acid and a vinyl monomer in a one-step or two-step operation to prepare a water-dispersion varnish for electrodeposition which has excellent dispersion stability and gives a coated film having excellent scrape abrasion resistance and high cut-through temperature.

Abstract: A process for preparing an insulation wire wherein the wire is dipped into a water dispersion synthetic resin and a resin layer is formed thereon by electrodeposition, and then the wire is immediately treated in a hot water or steam bath to co-melt colloidal particles of the resin in the resin layer, whereby the water in this resin layer is forced to move to the surface so that the water content may be kept at a minimum. The water on the resin layer is removed by blowing air thereacross and a vapor of a film-forming agent is then applied to the wire at high wire running speeds before the resin layer is cured in a heating furnace.

Abstract: A process for soldering a metal substrate coated with an electrodeposited non-peelable coating comprising 35-65 wt parts of methacryl ester, 10-40 wt parts of acrylonitrile, 2-15 wt parts of methacrylic acid, 3-10 wt parts of acrylamide and/or vinyl acetate, in 100 parts of resin.

Abstract: Coated products are prepared by electrodepositing a varnish from a water dispersion onto a conductive substrate; dipping said coated substrate into hot water so that the varnish is treated with said hot water; and thereafter treating said varnish coating with compressed steam.An apparatus for preparing such coated products comprises an electro-deposition vessel, a hot water vessel and a compressed steam treating device for improving the leveling of the coagulated electro-deposited film, whereby a continuous film having desired properties is formed without using an organic solvent.

Abstract: Coated products are prepared by electrodepositing a varnish from a water dispersion onto a conductive substrate; dipping said coated substrate into hot water so that the varnish is treated with said hot water; and thereafter treating said varnish coating with compressed steam.

Abstract: An apparatus for preparing an insulation wire by an electrodeposition coating method having means for forming a resin layer on the surface of a conductive material by electrodeposition coating, means for applying a coagulant thereto and means for curing by heating, wherein means are further provided for recovering the coagulant vapor generated in the means for applying the coagulant and in the means for heating the material.