Abstract: An aqueous solvent solution of an imide group-containing compound which contains an imide group-containing compound produced by partial hydrolysis of a polyimide molded article is provided. Provided are an aqueous solvent solution of an imide group-containing compound and a method for producing the same including steps of: (1) preparing a polyimide molded article by cutting the polyimide molded article into a predetermined size, (2) hydrolyzing the polyimide molded article at temperature conditions of 50 to 100° C. in the presence of water and a basic compound to have a crude imide group-containing compound in solution state, (3) purifying the crude imide group-containing compound in solution state to have an imide group-containing compound in semi-solid state, and (4) dissolving the imide group-containing compound in semi-solid state, an aqueous solvent, and a predetermined alkali compound to have a predetermined aqueous solvent solution.

Abstract: [Object] Provided is an aqueous treatment agent having a satisfactory environmental safety and aqueous solution stability, with which satisfactory surface modification properties are obtained for various molded articles and the like. [Solving Means] An aqueous treatment agent including an imide group-containing compound derived from an imide group-containing compound obtained by partially hydrolyzing a polyimide molded article; a fluororesin-containing aqueous dispersion liquid; and an amine compound, in which an incorporation amount of a fluororesin included in the fluororesin-containing aqueous dispersion liquid is adjusted to a value within the range of 0.1 to 10,000 parts by weight, in terms of solid content, with respect to 100 parts by weight of an imide group-containing compound included in the imide group-containing compound.

Abstract: Provided is an imide group-containing compound solution which includes an imide group-containing compound obtained by partially hydrolyzing a polyimide molded article, a solvent, and a viscosity stabilizer and is excellent in long-term storage stability. It is an imide group-containing compound solution including an imide group-containing compound obtained by partially hydrolyzing a polyimide molded article, a solvent, and a viscosity stabilizer. In the imide group-containing compound solution, an absorption peak derived from an imide group is observed at a wavenumber of 1,375 cm?1, an absorption peak derived from an amide group is observed at a wavenumber of 1,600 cm?1, and an absorption peak derived from a carboxyl group is observed at a wavenumber of 1,413 cm?1 in an infrared spectroscopy chart obtained by an infrared spectroscopic measurement of the imide group-containing compound and the viscosity stabilizer is an orthocarboxylic ester and a chelating agent or either one of the two.

Abstract: Provided by the invention is a compound containing an imido group that is obtained by partial hydrolysis of a polyimide molded article, in which the compound has an absorption peak derived from an imido group at wave number of 1375 cm?1, an absorption peak derived from an amide group at wave number of 1600 cm?1, and an absorption peak derived from a carboxyl group at wave number of 1413 cm?1 in the IR spectrum chart obtained by IR spectroscopic measurement.

Abstract: Provided by the invention is a compound containing an imido group that is obtained by partial hydrolysis of a polyimide molded article, in which the compound has an absorption peak derived from an imido group at wave number of 1375 cm?1, an absorption peak derived from an amide group at wave number of 1600 cm?1, and an absorption peak derived from a carboxyl group at wave number of 1413 cm?1 in the IR spectrum chart obtained by IR spectroscopic measurement.

Abstract: A powder coating composition is disclosed which includes (a) 100 parts by weight of a mixed epoxy resin having an epoxy equivalent of 800-2000 and containing (a-1) a diglycidyl ether of bisphenol A having an epoxy equivalent of 180-2500 and (a-2) a rubber-modified epoxy resin having an epoxy equivalent of 180-2500 and obtained by reaction of a diglycidyl ether of bisphenol A with a carboxyl terminated acrylonitrile-butadiene copolymer; (b) a mixed curing agent consisting of (b-1) 0.05-5 parts by weight of an imidazole compound, (b-2) 0.5-10 parts by weight of dicyanodiamide and (b-3) 1-10 parts by weight of a dihydrazide of a dibasic carboxylic acid; and (c) 50-100 parts by weight of silica.

Abstract: A powder coating composition is disclosed which includes a particulate material containing an epoxy resin and a curing agent, and fine powder of a charge controlling agent such as an acrylic resin, silica or a mixture thereof. The charge controlling agent is deposited on surfaces of the particles of the particulate material.

Abstract: An expandable, powder coating composition is disclosed which includes (a) a thermoplastic resin containing a hydroxyl group-containing polymer, (b) a cross-linking agent containing a polyisocyanate compound which is capable crosslinking the thermoplastic resin, (c) a blowing agent, and (d) a mixture of a solid plasticizer such as triphenyl phosphate and a liquid plasticizer such as dioctyl phthalate.

Abstract: A powder coating composition in which epoxy resin particles and curing agent particles are uniformly distributed is prepared by heating a specific powdery blend of (a) at least one crystalline epoxy resin, (b) at least one crystalline curing agent and (c) at least one non-crystalline epoxy resin and/or at least one non-crystalline curing agent at a specific temperature so that the crystalline particles are bonded with each other with the non-crystalline substance serving as a binder.

Abstract: A powder coating composition is disclosed which includes a particulate material containing an epoxy resin and a curing agent, and fine powder of a charge controlling agent such as an acrylic resin, silica or a mixture thereof. The charge controlling agent is deposited on surfaces of the particles of the particulate material. Additionally, a powder coating composition is disclosed in which two different charge controlling agents are used and are separately deposited on different particles of epoxy resin consisting particulate material.

Abstract: A composite material having a substrate and an expanded, cured layer of an epoxy resin composition which is provided over a surface of the substrate and in which a major portion of the cells are present in a location adjacent to the interface between the substrate and the expanded layer and substantially no cells are present on the top surface portion of the expanded layer. The epoxy resin composition includes an acid anhydride curing agent and an alkali metal carbonate blowing agent. The composition is coated over the substrate and the coating is heated to sure and expand the composition while maintaining the top surface of the coating below the expansion temperature.

Abstract: A metal bat for use in baseball is disclosed which includes a tubular metal body having an impact portion for hitting a ball, and a layer of a resin foam provided on and bonded to the inside wall of the impact portion and having a density of 0.05-0.5 g/cm.sup.3.

Abstract: A thermosetting powder composition is disclosed which comprises:a functional thermoplastic resin capable of reacting with a cyanate group and a molecular weight of at least 10,000;a polyfunctional cyanate compound; anda viscosity controlling agent which is a compound having at least one functional group capable of reacting with the functional thermoplastic resin and/or the polyfunctional cyanate compound and a molecular weight of less than 10,000. The composition is useful as a powder coating composition or a raw material for the formation of molded articles.

Abstract: A bent metal body with a resin coating is fabricated by first applying a powder coating composition to a metal body to form a hardenable resin layer, then bending the metal body bearing the resin layer, and then hardening the hardenable resin layer to form the resin coating.

Abstract: An expandable, powder coating composition is disclosed which comprises (a) a thermoplastic resin containing a copolymer of ethylene with vinyl acetate, (b) a cross-linking agent containing an organic peroxide, (c) a blowing agent, and (d) an organic plasticizer. Powder coating of a surface of a tube or box to be used in air conditioners with the coating composition can give a heat-insulating, foamed sheath or lining over the surface.

Abstract: An expandable, powder coating composition is disclosed which comprises (a) a thermoplastic resin containing a hydroxyl group-containing polymer, (b) a cross-linking agent containing a polyisocyanate compound which is capable of reacting with the hydroxyl groups of the polymer to crosslink the polymer at a temperature higher than the melting point of the thermoplastic resin and which is solid at room temperature, and (c) a blowing agent capable of decomposing and generating a gas when heated to a temperature higher than the melting point of the thermoplastic resin. Powder coating with the coating composition can give a heat-insulating, foamed sheath or lining over the surface of a metal tube or box to be used in air conditioners.

Abstract: A thermosetting, powder coating composition is disclosed which comprises an epoxy resin, a nitrogen-containing curing agent and an inorganic filler consisting essentially of aluminum hydroxide and silica, the weight ratio of the aluminum hydroxide to the silica being 1:4 to 4:1 and the filler being used in an amount of 40-300 parts by weight per 100 parts by weight of the epoxy resin.