Abstract: Conductors of electric current in turbine generators and the like are insulated with materials resistant to damage by corona discharge. The insulating materials include an inner layer of a thermoplastic such as a polyetherimide, and an outer layer of a polyorganosiloxane material such as a silicone polyimide or the product of curing a room temperature vulcanizable silicone composition.

Abstract: A method is provided for salvaging organic thermoplastic values from discarded shaped organic thermoplastic substrate which has been surface treated with a protective or decorative organic coating can be salvaged and recycled. The discarded shaped organic thermoplastic substrate, such as a polycarbonate substrate can be granulated, treated with an aqueous alkaline solution which can contain a water miscible organic solvent, such as methanol and thereafter washed until neutral and dried.

Abstract: Silicone polyimides resulting from the condensation of para phenylene diamine and an organic dianhydride mixture of a bis(phthalic anhydride)poly(diorganosiloxane), a 2,2 bis[4-(3,4-dicarboxyphenoxy)phenyl] propane dianhydride and hydroquinone dianhydride in a dipolar aprotic solvent have been found to be substantially insoluble in chlorinated organic solvents such as chloroform and useful as melt extrudable wire coating compositions.

Abstract: Curable compositions containing a reaction product of at least one bisphenol polyglycidyl ether, at least one epoxidized novolak and at least one brominated bisphenol, in combination with a polyphenylene ether and further components including specific catalysts and hardeners, may be used in the preparation of laminates useful as printed circuit boards and having excellent physical and electrical properties.

Abstract: Curable compositions containing a reaction product of at least one bisphenol polyglycidyl ether, at least one epoxidized novolak and at least one brominated bisphenol, in combination with a polyphenylene ether and further components including specific catalysts and hardeners, may be used in the preparation of laminates useful as printed circuit boards and having excellent physical and electrical properties.

Abstract: Photopatternable silicone polyamic acid can be spun onto a substrate and thereafter used in combination with a photoresist as an antireflective coating or as a patterned silicone polyimide. The silicone polyamic acid can be used with an absorbing dye, or it can be tinted with an organic dye to provide color filters when applied on a transparent substrate.

Abstract: Curable compositions containing a reaction product of at least one bisphenol polyglycidyl ether, at least one epoxidized novolak and at least one brominated bisphenol, in combination with a polyphenylene ether and further components including specific catalysts and hardeners, may be used in the preparation of laminates useful as printed circuit boards and having excellent physical and electrical properties.

Abstract: Photopatternable silicone polyamic acid can be spun onto a substrate and thereafter used in combination with a photoresist as an antireflective coating or as a patterned silicone polyamide. The silicone polyamic acid can be used with an absorbing dye, or it can be tinted with an organic dye to provide color filters when applied on a transparent substrate.

Abstract: Carboxy-terminated prepolymers are prepared by the reaction of a diamine, preferably an aromatic diamine, or a mixture thereof with a triamine, with a carboxy anhydride such as trimellitic anhydride and a dianhydride such as bisphenol A dianhydride. The prepolymers, or functional derivatives thereof, are then reacted with a diisocyanate or diamine, or a mixture thereof with a triisocyanate or triamine, preferably an aromatic diisocyanate, to produce copolyamideimides. The products prepared using triamines or triisocyanates are crosslinked. Other products containing alkyl or alicyclic groups attached to aromatic radicals can be oxidatively crosslinked, e.g., by heating in air.

Abstract: Diaryl and substituted diaryl carbonates are formed by a series of steps, the first step involving the production of a dialkyl carbonate from an alkanol, carbon monoxide and oxygen; and the second step involving the reaction of the dialkyl carbonate with a phenyl ester or substituted phenyl ester in the presence of a dialkyl tin compound to produce a mixture of diaryl carbonate, alkyl aryl carbonate, and an alkyl ester. The alkyl ester can be heated to reform the alkanol and form ketene; in turn the ketene can be reacted with the phenol or substituted phenol to form the phenyl ester or substituted phenyl ester used in the second step above.

Abstract: Polyamideimides are prepared by first reacting a diamine, preferably an aromatic diamine, with a carboxy anhydride such as trimellitic anhydride and a dianhydride such as bisphenol A dianhydride; and then reacting mixtures of the resulting prepolymers and dicarboxylic acid, or functional derivatives thereof, with a diisocyanate or diamine, preferably an aromatic diisocyanate.

Abstract: Polycarbonates are formed by the interaction of a bisphenol diester, carbon monoxide and oxygen. The initial polycarbonate product is an oligomer which, upon heat treatment, polymerizes to a high molecular weight polycarbonate. The products produced according to the present invention are chainstopped prior to heat treatment, making them less thermally and oxidatively sensitive.

Abstract: Disclosed is a coating solution including an aromatic bis(ether anhydride) component, an organic diamine component, an organic triamine component, and a solvent system, and optionally water which may be coated on a substrate and polymerized to form high quality polyetherimide coatings.

Abstract: An insulated heat bondable electrically conductive material includes an electrically conductive substrate, a base coat on the substrate of electrically insulating, heat resistant, cured resin, and an overcoat of heat curable acrylic polymer upon the base coat forming a heat bondable acrylic polymer coating thereon.The disclosure also includes: an insulated heat bondable magnet wire; a bondable enamel coated, insulated electrical conductor; an article; a dynamoelectric machine; a method of making an insulated, heat bondable metal substrate; and, a method of self-bonding a plurality of turns of a magnet wire.

Abstract: Polycarbonate resins which have been polymerized employing titanates as polymerizing agents generally have characteristic undesirable color. Removal of this color is accomplished by treatment of the polycarbonate resin with a quantity of an organic acid anhydride, optionally employing a smaller amount of a mineral acid, in addition for lower temperature decolorization.

Abstract: Disclosed is a coating solution including an oligomeric polyetherimide component, an organic diamine component, an organic triamine component, a solvent system and optionally water, which may be coated on a substrate and polymerized to form high quality polyetherimide coatings and a process for preparing the solution.

Abstract: Disclosed is a coating solution including an oligomeric polyetherimide component, an oligomeric diamine component, a solvent system and optionally water which may be coated on a substrate and polymerized to form high quality polyetherimide coatings and a process for preparing the solution.

Abstract: Interaction of ethylene glycol with a preformed polyesterimide resin at elevated temperatures forms mixtures homogeneous and clear at room temperature and also soluble in non-polluting solvents, such as monoethers of glycols.

Abstract: A circuit board having a photoflash array is provided based on the screen printing of a radiation curable ink onto the surface of a substrate followed by the radiation cure of the ink.

Abstract: A radiation curable ink is provided which is convertible to a conductive coating when cured on the surface of a substrate. A particulated electrically conductive .[.metal containing.]. material is used in combination with an organic resin binder. Low temperature cure of the ink can be achieved with either actinic or ionizing radiation.