Abstract: Bridged dense star polymers having terminal group densities greater than conventional extended star polymers exhibit greater and more uniform reactivity than their corresponding conventional star polymers. For example, a third generation, hydroxy-terminated polyether dense star polymer can be prepared from pentaerythrityltetrabromide and 4-hydroxymethyl-2,6,7-trioxabicyclo[2.2.2]-octane which has a molecular volume less than 80 percent of the volume of a conventional extended star polymer made from similar materials. This dense star polymer can then be bridged by reacting it with a suitable difunctional reactant such as toluene diisocyanate. Such polymers of dense star polymers are useful as demulsifiers for oil/water emulsions, wet strength agents in the manufacture of paper, proton scavengers, calibration standards for electron microscopy, and agents for modifying viscosity in aqueous formulations such as paints.

Abstract: Polyimides or poly(amide-imides), especially those containing a polysiloxane unit are improved by heating such polymers or their polyamic acid precursors with a polyfunctional aromatic compound. The polyfunctional aromatic compound is one which contains at least two reactive groups which may be --NH.sub.2, --COOH, --OH or secondary amino groups with at least one of the reactive groups being --NH.sub.2 or --COOH.

Abstract: An aromatic polythioetheramide-imide having a recurring unit of the following general formula (II): ##STR1## wherein --Ar--, which may be the same or different in the polymer, each represents a divalent aromatic residue. The aromatic polythioetheramide-imides are excellent in the balance of mechanical properties, heat resistance and moldability and can be used widely for parts in electric and electronic fields, housings, automobile parts, aircraft interior parts, sliding parts, gears, insulating materials, heat-resistant films, heat-resistant varnishes, heat-resistant fibers, etc.

Abstract: Novel polymers and molding compositions are prepared from acyl halide derivatives of tricarboxylic acids and diamines and about 1 to about 10 percent by weight of phthalic anhydride, or trimellitic anhydride or aniline moieties. The polymers are useful in engineering plastics.

Abstract: Described herein are amide and/or imide containing polymers based on novel monomers that contain isoalkylidene bridges. These polymers have excellent toughness combined with high temperature stability, low water absorption, and good melt-fabricability.

Abstract: Rod-shaped dendrimers having a plurality of dendritic branches emanating from an essentially linear core are prepared by first reacting a linear polyfunctional core compound such as a polyethyleneimine with a first dendritic branching reactant such as an ester of an unsaturated carboxylic acid, e.g., methyl acrylate, and then successively reacting the resulting product with a second dendritic branching reactant such as ethylenediamine and then with the first or another dendritic branching reactant.The rod-shaped dendrimers are useful in the production of molecular composites and as crystallinity modifiers for polymeric materials.

Abstract: Aromatic or aliphatic dianhydrides and/or acid anhydrides are reacted with certain aromatic diamines alone or in combination with other diamines to produce polyimides, polyamide acids, poly(amide-imides), poly(amide-amide acids), poly(esterimides) or poly(esteramide acids). These polymers are thermoplastic in nature and have improved processing characteristics and thermal stability. The polymers may be prepared by either melt or solution polymerization techniques.

Abstract: Polymer compositions containing repeating units from 0 to 95 mol percent of aromatic dicarboxylic acids containing 8 to 16 carbon atoms and having at least three carbon atoms between carboxyl groups or esters thereof, repeating units from 0 to 95 mol % 1,4-cyclohexanedimethanol, repeating units from 5 to 100 mol % trimellitic acid or anhydride, and repeating units from 5 to 100 mol % 4-(aminomethyl)cyclohexanemethanol, and wherein the mol % of the repeating units from the trimellitic acid or anhydride does not exceed the mol % of repeating units from the 4-(aminomethyl)cyclohexanemethanol.

Abstract: A method for making an electrical inductive device for use in hermetic atmospheres which incorporate refrigerants such as halogenated methane compositions, for example refrigerant R-22, monochlorodifluoromethane. The device may be a wound coil device formed of magnet wire, the enamel coating of which has resistance to blistering when exposed to refrigerants under saturated conditions at temperatures up to about 200.degree. or 210.degree. C. and above. The enamel coating composition or wire enamel is formed as the reaction product of 1,2,3,4-butanetetracarboxylic dianhydride, optionally with an aromatic dianhydride, and a diamine such as p,p'-methylenedianiline or p,p'-oxydianiline, in an organic solvent such as N-methyl-2-pyrrolidone.

Abstract: In a process for producing a formed article of aromatic polyamide-imide resin by compression-molding at the temperature lower than the melting temperature of the resin, the improvement which comprises subjecting the resin, prior to the molding, to heat treatment in an oxygen-containing gas under conditions satisfying the following equationlogt.gtoreq.a.sub.1 +a.sub.2 T+a.sub.3 T.sup.2 +a.sub.4 T.sup.3,wherein a.sub.1 =2.5841, a.sub.2 =-8.4926.times.10.sup.-3, a.sub.3 =6.9984.times.10.sup.-6, and a.sub.4 =-2.0449.times.10.sup.-8 ; t and T represent the heat-treatment time in hour and the heat-treatment temperature in .degree.C., respectively; and 200.degree. C..ltoreq.T.ltoreq.400.degree.C.

Abstract: A process for the manufacture of polyamides, polyamide-imides and polyimides which process comprises preparing a salt of an aliphatic or aromatic diamine or a mixture of these and di, tri or tetracarboxylic acid or mixture of these or their corresponding anhydride by reacting both feedstocks at a temperature of about 300.degree. to 500.degree. F. in a solvent medium provided the water content of the resulting solution is below 25% water by weight the resulting salt solution is subjected to a pressure of about 1500-3000 psig and is then passed through a preheat zone where the temperature is increased to about 625.degree. F., the total residence time is kept at about 25 to about 50 seconds. The reactants are flashed through a control valve or nozzle to give an aerosol mist at a pressure of about 0-400 psig, the polymerization is further carried out in a flash reactor with a high heat flux and with wall temperatures of about 600.degree. F. to about 1000.degree. F. and melt temperatures of about 500.degree. F.

Abstract: Dense star polymers having terminal group densities greater than conventional extended star polymers exhibit greater and more uniform reactivity than their corresponding conventional star polymers. For example, a third generation, hydroxy-terminated polyether dense star polymer can be prepared from pentaerythrityltetrabromide and 4-hydroxymethyl-2,6,7-trioxabicyclo[2.2.2]-octane which has a molecular volume less than 80 percent of the volume of a conventional extended star polymer made from similar materials. Such dense star polymers are useful as demulsifiers for oil/water emulsions, wet strength agents in the manufacture of paper, proton scavengers, calibration standards for electron microscopy, and agents for modifying viscosity in aqueous formulations such as paints.

Abstract: A process for the manufacture of extruded articles by extruding polyamide-imide polymers and copolymers through melt flow channels and extrusion dies at ever increasing shear rates ranging from 0.1 sec.sup.-1 to about 2000 sec.sup.-1. The extruder barrel and melt flow channel temperatures range from about 480.degree. to about 600.degree. F. and the extrusion die temperatures range from about 575.degree. to about 680.degree. F. Also, the addition of polyetherimides and polysulfones is disclosed. Thin films, thin sheets and hollow tubes are disclosed. All these articles are useful in engineering applications requiring high temperature resistant plastics. Useful applications include use in the aerospace and automobile industry.

Abstract: Poly(imide)-containing polymers suitable for use in molding or casting applications are formed by polymerization of an anhydride-containing precursor of the formula ##STR1## wherein Y is a divalent hydrocarbon group or a divalent hydrocarbon group containing oxygen, sulfur, nitrogen, silicon, phosphorus or halogen atoms;R is phenyl or C.sub.1-10 alkyl; andX is an oligomer or polymer-forming reactive moiety with reactive nitrogen-containing polyfunctional comonomers.

Abstract: Novel copolyoxadiazole-imides are disclosed. These copolyoxadiazole-imides are useful for the manufacture of fibers, films, felts, coatings and molded objects.

Abstract: The object of the invention is a process for the production of flat varnishes based on powder coatings of 1,2-epoxy compounds with at least one 1,2-epoxy group in the molecule and a lower melting point of >40.degree. C., salts of aromatic carboxylic acids with 3 and more carboxyl groups and imidazolines as curing agents, as well as the usual additives and the application of the powdered varnish upon the objects to be varnished and heating of these objects to temperatures of 160.degree.-240.degree. C., whereby the salt of 2-phenyl-methyl-.DELTA.2-imidazoline and trimellitic acid is substituted up to 60 mole % by a salt of 2-phenyl-.DELTA.2-imidazoline and trimellitic acid.

Abstract: Novel polyamide-imide resin compositions, useful for electrically insulating conductors, are prepared by polycondensing a tribasic acid anhydride compound and a diisocyanate in an inert organic solvent in the presence of a catalytic amount of an oxyanion or amine compound at a high solids content, and controlling the reaction to prevent a great increase in viscosity.

Abstract: A polyamide acid composition for preparing a polyimide which can extend the pot life of the composition comprising a solution of a polyamide acid in an organic solvent, the polyamide acid being a precursor of the polyimide, a dehydrating agent, a catalyst and a pot life extending agent which can lower a rate of conversion of the polyamide acid to the polyimide, and the process for preparing the polyimide from said polyamide acid composition. According to the present invention the pot life can be extremely extended to give the composition an enough flowability for a long time without reducing the excellent properties such as a heat resistance and an electric insulation of the obtained polyimide.

Abstract: An improved lift-off process for forming metallized interconnections between various regions on a semi-conductor device relies on the use of a particular polyimide in forming a protective mask over the device. The polyimide is a copolymer of an aromatic cycloaliphatic diamine and a dianhydride which allows the resulting structure to withstand particularly high temperatures in the fabrication process. In particular, the polyamide when subjected to high temperature metallization under vacuum remains sufficiently soluble to be substantially completely removed from the device by immersion in common organic solvents. This allows high temperature metallization as interconnects for integrated circuits.

Abstract: In a process for producing an aromatic polyamide-imide by polycondensation of an aromatic tricarboxylic acid and/or aromatic tricarboxylic anhydride and an aromatic diamine with heating in the presence of a dehydration catalyst, the improvement which comprises using a solvent containing sulfolane as a reaction medium.

Abstract: Novel Poly[N,N'-(alkyl or aryl)-bis(4,4'-phthalimido)-1,3,4-oxadiazole-2,5-diyls], compositions for fibers, films, coatings and molded objects featuring high strength and high thermal properties with formulation advantages.

Abstract: The compositions described herein comprise polyimides having bis-maleimide terminal groups and having the formula: ##STR1## wherein Q is a trivalent aromatic radical, Ar is a divalent aromatic radical, Ar" is a tetravalent aromatic radical and n has a value of 0-20. Derivatives may be made of these compounds by homopolymerization, copolymerization with other copolymerizable materials and by reaction with Diels-Alder reactable materials.

Abstract: A polymer capable of forming an anisotropic melt characterized in that the polymer chain includes residues of cross-linking reactants at a concentration sufficient to give a polymer with a melt viscosity of not greater than 10.sup.7 Nsec/m.sup.2 measured by capillary rheometry at a shear rate of 10.sup.4 N/m.sup.2. The polymers exhibit favorable shear dependent viscosity characteristics in that the viscosity is high under low shear conditions and is low under high shear conditions, as judged by the viscosity characteristics of polymers of the same composition but not containing the residues of cross-linking reactants.

Abstract: The resins described herein are polyimide-epoxy thermoset resins prepared by reacting a polyepoxide with a solution of an admixture of a polyimide dianhydride with another polyimide component, either a polyimide dianhydride or a polyimide diamine, at least one of which polyimide components is insoluble in the particular solvent in the absence of the other polyimide component or components. "Polyimide dianhydride" is an anhydride-terminated polyimide and "polyimide diamine" is an amine-terminated polyimide as represented by the respective formulas: ##STR1## wherein Ar', Ar and n are as defined hereinafter. For use in the present compositions, the polyimide dianhydride has an anhydride activity of at least 0.17 as defined herein, and the ratio of epoxy equivalent to anhydride plus amine equivalents is at least 1/1.

Abstract: Compounds are described which are characterized by the formula ##STR1## C.sub.n H.sub.2n =alkylene with 2 to 6 C atoms in the chain. R=inert substituent and m=0-3.The compounds contain an anhydride group and a hetero ring capable of opening to yield an isocyanate group on heating. Accordingly, they can undergo self-condensation on heating to yield polyamide-imides. The compounds can also be polymerized by heating in the presence of difunctional monomers such as diols, diamines, alkanolamines and the like.

Abstract: An article for electrical use such as insulative substrates, electrical circuit borads and electrical elements, wholly or partly consisting out of an aromatic polyamide-imide having a reduced viscosity of from about 0.3 to 1.5, which polyamide-imide may contain a granular material dispersed therein, and a composition comprising 100 parts by weight of said polyamide-imide and additional about 100 to 4,000 parts by weight of a granular material and optionally about 10 to 10,000 parts by weight of a polar organic solvent.

Abstract: Polyamide silicate resinous products are produced by reacting halosilicon acids with a polyamine compound and a polycarboxylic acid and/or polycarboxylic anhydride. The polyamide silicate resinous products may be utilized as molding powders, as films, as sheets, as coating agents, as caulking compounds, as an adhesive and in the production of polyurethane silicate resins and foams.

Abstract: A low molecular weight polyester-imide resin is prepared wherein there is employed as the dibasic acid either 100% of the diimide dicarboxylic prepared by reacting two moles of trimellitic anhydride with one mole of methylene dianiline (the diimide is abbreviated DID) or oxydianiline or the dibasic acid can also contain a small percent of another aromatic acid. The product is used to produce coated wires having outstanding heat shock. The product also is useful to provide a top coat to wire coated with a polyester or with another polyester-imide.

Abstract: Injection moldable copolymers are prepared from fully or partially acylated aromatic diamines and aromatic tricarboxylic anhydride compounds, aromatic dicarboxylic acids or mixtures of aromatic tricarboxylic acid anhydrides and aromatic dicarboxylic acids. These copolymers are useful for the preparation of injection molded articles and fibers.

Abstract: Novel copolymers and terpolymers of the amide-imide type are prepared from tricarboxylic acid anhydride compounds, N,N'-diacylated diamines, N-acylated diamines, and primary diamines. These copolymers and terpolymers are useful for preparing injection molded articles of superior properties. A novel process for the manufacture of amide-imide copolymers and terpolymers is disclosed wherein the imide, imide-imide, amide, and amide-amide moieties incorporated into the polymer backbone can be controlled by acylating the amine functionality which is to form the amide and amide-amide moieties while reacting directly those diamines with a tricarboxylic anhydride compound which are intended to form the imide and imide-imide moieties.

Abstract: Copolymers of etherimides and amides have been found to be useful in the coating and molding arts.

Abstract: Copolymers of etherimides and amideimides have been found to be useful in the coating and molding arts.

Abstract: Curable resin compositions comprising a mixture and/or a preliminary reaction product of (a) at least one cyanate compound selected from the group consisting of polyfunctional cyanate esters, prepolymers of said cyanate esters, coprepolymers of said cyanate esters and an amine and mixtures thereof and (b) a polyamideimide resin and optionally (c) at least one maleimide compound selected from the group consisting of polyfunctional maleimides, prepolymers of said maleimides, coprepolymers of said maleimides and an amine and mixtures thereof are disclosed.

Abstract: A novel process for the preparation of injection moldable polymers prepared from diacylated aliphatic diamines, tricarboxylic anhydride compounds and aliphatic primary diamines. These polymers are useful for the preparation of injection molded articles and fibers. A process for enhancing the crystallization of these polymers by the addition of nucleating agents is also disclosed.

Abstract: A novel process for the preparation of injection moldable polymers prepared from diacylated aliphatic diamines, tricarboxylic anhydride compounds and aliphatic primary diamines. These polymers are useful for the preparation of injection molded articles and fibers. A process for enhancing the crystallization of these polymers by the addition of nucleating agents is also disclosed.

Abstract: There is described photosensitive polymer composition and a polyimide film-coated material made by applying the composition to a support, irradiating with ultraviolet and thereafter heating. The photosensitive polymer composition is prepared by adding a sensitizer to a photosensitive polyamide acid intermediate solution which is obtained by reacting in an inert solvent a first compound comprising 100 to 5% by weight of a photosensitive group-containing diamine and 0 to 95% by weight of a diamine having no photosensitive group, with a second compound comprising at least one compound selected from a tetracarboxylic acid dianhydride and a tricarboxylic acid anhydride monohalide.

Abstract: In a method producing a polycondensate by bulk polycondensation of a monomer (or a reactant mixture) which is a fluid at the polycondensation temperature, an improvement which comprises carrying out the polycondensation until substantially the whole polycondensate becomes a solid polydispersion while continually applying a shearing force sufficient for maintaining the polycondensation system in polydispersed state at a temperature of below the sintering of the produced polycondensate but sufficiently high for allowing the polycondensation to proceed substantially.

Abstract: Injection moldable copolymers are prepared from fully or partially acylated aromatic diamines and aromatic tricarboxylic anhydride compounds or mixtures of tricarboxylic anhydrides and dicarboxylic acids. These copolymers are useful for the preparation of injection molded articles and fibers.

Abstract: A process for purifying an acetylene-terminated polyimide oligomer containing residual solvent in which the oligomer is initially dissolved in the same solvent used as the reaction medium in its synthesis. After precipitating the oligomer from solution by mixing with an aqueous solution of potassium or sodium chloride, the precipitated oligomer is washed successively with a plurality of liquids of decreasing polarity to provide an oligomer free of residual solvent.

Abstract: Novel tailor made copolymers and terpolymers of the amide-imide type are prepared from tricarboxylic acid anhydride compounds, N,N'-diacylated diamines, N-acylated diamines, and primary diamines. These copolymers and terpolymers are useful for preparing injection molded articles of superior properties. A novel process for the manufacture of amide-imide copolymers and terpolymers is disclosed wherein the imide, imide-imide, amide, and amide-imide moieties incorporated into the polymer backbone are controlled by acylating the amine functionality which is to form the amide and amide-amide moieties while reacting directly those diamines with a tricarboxylic anhydride compound which are intended to form the imide and imide-imide moieties.

Abstract: New and useful polymers are prepared by reacting olefin-terminated prepolymeric materials with simple polyamine, by reacting simple olefins with amine-terminated prepolymers and by reacting olefin-terminated prepolymers with amine-terminated prepolymers. The new and useful polymeric materials so obtained can be cured as with heat, with or without catalyst, to provide products useful for preparing films, laminates, composites, prepregs, molding materials, varnishes, wire enamels and the like.

Abstract: A protective layer composition, suitable for protecting metal electrodes on components and other microelectronic circuitry, comprises an organic thermoplastic polymeric material, an organic solvent or solvents, and a non-ionic fluorocarbon surfactant as a wetting/leveling/flow control agent. A typical formulation comprises an aromatic polymer which cures to form a polyamide-imide polymer, an organic solvent or a mixture of orangic solvents and a non-ionic fluorocarbon surfactant.

Abstract: An improved substantially solvent-free process for preparing phthalate-moiety based polyesterimide resins, new resins prepared by the process, and substrates (e.g., electrical conductors) coated with compositions comprising the new resins are described.

Abstract: Fibrids are prepared by introducing a solution of a polymer into a liquid precipitation medium while exposing it to shearing forces. A poly(amide-imide) resin solution is admixed with a solvent which is miscible with the resin solvent but which is a non-solvent for the resin itself.

Abstract: Novel terpolymers of the amide-imide type are prepared from tricarboxylic-acid-anhydride derivatives, aromatic diamino quinones and two other wholly-aromatic primary diamines. The novel terpolymers are useful for preparing molded articles of superior properties at injection molding temperatures lower than required for molding the amide-imide copolymers disclosed in the prior art.

Abstract: An energy-conserving method for the manufacture of polyaminoamides is described which involves the reaction of a polycarboxylate ester with a mono and/or polyalkylene polyamine in the presence of 0 to about 5% by weight water by heating approximately stoichiometric proportions of the two reactants to the temperature at which the amidification reaction becomes self-sustaining, then utilizing the exothermic heat of reaction to sustain the reaction at a desired temperature. During the reaction, the heat of reaction is used to vaporize an alcohol reaction product and remove the alcohol from the reaction vessel and from further contact with the reaction vessel contents.

Abstract: Process for heat treating a shaped article of polyamide-imide or polyamic acid comprising preheating the article to remove a major portion of volatiles contained in the article and generated therein and to increase the polymer's deflection temperature by about 15 to about 35.degree. F. without deformation of the article, and heating the article at about 5.degree. to about 25.degree. F. below the increased deflection temperature to progressively increase the polymer's deflection temperature to substantially its maximum attainable value without deformation, said preheating and heating being carried out in the presence of a circulating gas.

Abstract: Adamantane compounds having 2 to 4 bridgehead positions substituted with phenylacyl moieties are prepared by oxidizing poly(phenylalkyl) adamantanes. The polyacyl adamantane compounds are useful as intermediates for polyesters, polyamides and polyimides. The esters are useful as plasticizers for polyvinylchloride.

Abstract: Coating compositions comprising alkoxymethylaminotriazines, polyols and polyhydroxy oligomers which are useful for low temperature cure, are low in viscosity to allow ease of coating without the need for appreciable amounts of solvent thinners, and provide coatings free from the problems of crawling, cratering, pinholing and "orange peel" formation. The alkoxymethylaminotriazines are preferably alkoxymethylmelamines. The polyols are polymethylol cyclohexanes containing from 2 to 4 methylol groups. The polyhydroxy oligomers are polyesters or acrylic resins. The compositions may be cured in the presence of acid catalysts in the temperature range of 70.degree. to 105.degree. C.

Abstract: This invention relates to a novel aromatic diamine and more particularly to the use of said diamine for the preparation of thermally stable high-molecular weight polymers including, for example, polyamides, polyamideimides, polyimides, and the like. This diamine is obtained by reacting a stoichometric amount of a disodium salt of 2,2-bis(4-hydroxyphenyl) hexafluoropropane with 4-chloronitrobenzene to obtain an intermediate, 2,2-bis[4-(4-nitrophenoxy)phenyl] hexafluoropropane, which is reduced to the corresponding 2,2-bis[4-(4-aminophenoxy)phenyl] hexafluoropropane.