Abstract: A composition comprising an aromatic carbonate polymer in admixture with a mold release effective amount of a compound of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different and are alkyl of one to twenty-five carbon atoms, inclusive with the proviso that the amide is not excessively volatizable under polymer processing conditions.

Abstract: A method for repairing perfluorocarbon copolymeric cation exchange membranes. A quantity of a perfluorocarbon copolymer having a desired pendant cation exchange functional group is partially solvated in a solvating dispersion media, applied to areas of the membrane to be repaired, and the dispersion media removed.

Abstract: An aromatic polyamic acid solution composition useful as an electrically insulating varnish, comprises (1) an aromatic polyamic acid which is a polymerization product of (A) a tetracarboxylic acid component containing at least 80 molar % of the sum of (a) a first acid ingredient consisting of 3,3',4,4'-biphenyltetracarboxylic dianhydride and (b) a second acid ingredient consisting of at least one member selected from the group consisting of pyromellitic dianhydride, and 3,3'4,4'-benzophenone tetracarboxylic dianhydride, the molar ratio of the first acid ingredient to the second acid ingredient being in the range of from 30:70 to 75:25, with (B) an amine component consisting of at least one aromatic amine in a molar ratio of the tetracarboxylic acid component to the amine component of from 97:100 to 103:100, and which polymeric acid has a logarithmic viscosity number of from 0.1 to 1.5 determined in a concentration of 0.5 g/100 ml in N-methyl-2-pyrrolidone at a temperature of 30.degree. C.

Abstract: There is provided an aromatic polyamide composition, which comprises (a) a polyamide, the recurring structural units of which are substantially totally aromatic, (b) an organic amide solvent, and (c) one or more salts selected from chlorides and bromides of an alkali metal, an alkaline earth metal or ammonium. The amounts of the polyamide and the organic amide solvent are in the ranges of 30 to 50% and 70 to 50% by weight, respectively, based on the total weight of the polyamide and the organic amide solvent. The amount of the salt is defined by the formulae:in the case where 30.ltoreq.x.ltoreq.33.6, y.gtoreq.10, andin the case where 33.6<x.ltoreq.50, y>2.8x-84wherein "x" is the amount in % by weight of the polyamide based on the total weight of the polyamide and the organic amide solvent, and "y" is the amount in % by mole of the salt based on the polyamide. The polyamide composition is useful for melt-shaping films, fibers and other shaped articles.

Abstract: An improved wire enamel consisting essentially of the following materials by weight wherein basis is wire enamel weight; at least 50% by wt. of a polar organic solvent; about 2-8% by wt. of a polyimide precursor which can be cured to yield a polyimide polymer; about 0.5 to about 25% by weight of the substituted aliphatic hydrocarbon solvent for the polyimide precursor having a surface tension and polarity greater than that of the halogenated aliphatic hydrocarbon described below or a substituted aromatic hydrocarbon having a dipole moment less than or equal to the dipole moment of the halogenated aliphatic hydrocarbon described below; about 5 to 40% by wt. of a halogenated aliphatic hydrocarbon; and 0 to about 1% by wt. of an organosilane which increases the adhesion of the polyimide to an underlying substrate.

Abstract: A process for the preparation of polyurethane resins particularly suitable for electrostatic spinning which comprises forming a prepolymer of polyether glycol and a diisocyanate reacted in a molar ratio of about 1:2, and thereafter reacting the prepolymer with additional diisocyanate and a diol extender, the final molar ratio of the polyether, isocyanate and diol reactants being approximately 1:3.7:2.5. The reaction is conducted in an organic solvent at a temperature of about 45.degree. C. to obtain a polymer having an inherent viscosity of from about 2.0 to 2.4 in a solution of 25 to 30 percent solids. The solution is diluted to about 15 percent solids prior to spinning.

Abstract: The low temperature properties (i.e., the stability of the emulsion upon repeated freeze-thaw cycles and/or the fluidity of the emulsion at low temperatures such as -20.degree. C.) of a self-inverting water-in-oil emulsion of a water-soluble polymer are improved by incorporating an N,N-dialkyl amide in the emulsion.

Abstract: A poly(conjugated polymethine-type)dye which is the polycondensation reaction product in the presence of strong protic acid of an aromatic polyamine and a dicarbonyl compound. These polymers are useful in the fabrication of optical recording elements and in other electronic applications.

Abstract: A composition of materials comprising a polyamide acid-silicone intermediate obtained by reacting (a) a diaminoamide compound of the formula: ##STR1## wherein Ar and Y are as defined in the specification, (b) a diaminosiloxane, (c) a diamine, and (d) an aromatic tetracarboxylic acid dianhydride can form a protective film used in a semiconductor device excellent in adhesive properties, heat resistance and preventing soft errors due to .alpha.-rays.

Abstract: The present invention relates to a process for producing an of aromatic polyimide film comprising (A) casting on a support a dope containing an amide-type polar solvent and 10-45 weight percent of a polyamic acid having more than 0.4 dl/g an inherent viscosity of more than 0.4 dl/g, (B) concentrating the polymer content to be at least higher than that of the initial dope while simultaneously raising the ring closure ratio above 30%, (C) removing the solvent from the film by extraction in an aqueous medium so as to lower the solvent content of the film below 10% and (D) then heating the film to a temperature of more than 200.degree. C.The process of the present invention is useful for the production of aromatic polyimide film having a reduced rate of solvent decomposition and improved productivity.

Abstract: The present invention relates to a process for the viscosification of an aqueous liquid which includes the steps of forming a solvent system of an organic liquid or oil and a polar cosolvent, the polar cosolvent being less than about 15 weight percent of the solvent system, a viscosity of the solvent system being less than about 100 cps; dissolving a neutralized sulfonated polymer in the solvent system to form a solution, a concentration of the neutralized sulfonated polymer in the solution being about 0.01 to about 0.5 weight percent, a viscosity of the solution being less than about 200 cps; and admixing or contacting said solution with about 5 to about 500 volume percent water, the water being immiscible with the organic liquid and the polar cosolvent and neutralized sulfonated polymer transferring from the organic liquid to the water phase, thereby causing the water phase to thicken.

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: Paintable, cured polyorganosiloxane sealants are prepared at room temperature from room temperature curable compositions containing a hydroxyl-terminated polyorganosiloxane, an organosilicon compound containing at least two amido groups, aminoxy groups or combinations thereof, per molecule and a substituted alcohol where the substituent is acyloxy, alkoxycarbonyl, cyano, ##STR1## mercapto, or the combination of a carbon-to-carbon triple bond and an ether-type oxygen atom, where each Y and Z are individually selected from the group consisting of hydrogen, hydrocarbyl and halohydrocarbyl.

Abstract: A coating composition comprises(A) an alkyl ether methylolmelamine in which a part or whole of methylol groups of methylolmelamine are converted into alkyl ether methylol groups;(B) a polyhydric alcohol having 2 or more hydroxyl groups; and(C) a dispersion of colloidal silica which can be condensed each other for the two or three components; and(D) a solvent.

Abstract: The present invention relates to a process for the gelation (i.e. thickening) of salt water which includes the steps of forming a solvent system of an organic liquid or oil and a polar cosolvent, the polar cosolvent being less than about 15 weight percent of the solvent system, a viscosity of the solvent system being less than about 100 cps; dissolving a nonionic surfactant and water insoluble, neutralized or unneutralized sulfonated polymer in the solvent system to form a solution, a concentration of the neutralized, or unneutralized sulfonated polymer in the solution being about 0.01 to about 0.5 weight percent, the concentration of the nonionic surfactant in the solvent system being about 0.0001 to about 1.

Abstract: This invention relates to the repair of tears in vinyl chloride such as naugahyde, particularly when such materials form part of a covered seating material, by using a composition containing a vinyl chloride-vinyl acetate copolymer in an organic solvent.

Abstract: For the coating of plastics with polyvinylidene fluoride, finely divided polyvinylidene fluoride is dispersed in a solvent mixture of(a) at least one high-boiling, organic solvent with a boiling point up to 250.degree. C., which dissolves polyvinylidene fluoride little or not at all, and(b) at least one strongly polar latent organic solvent for polyvinylidene fluoride, the dispersion obtained is dissolved in(c) at least one low-boiling polar organic solvent with a boiling point up to 120.degree. C., the plastic surface is coated with the solution and the latter is baked on at a temperature of 100.degree. to 300.degree. C.A bake-on varnish suitable for the method contains, for example:3 to 25 wt.-% of polyvinylidene fluoride, 5 to 20 wt.-% of at least one high-boiling organic solvent with a boiling point up to 250.degree. C.,1 to 10 wt.-% of at least one strongly polar latent organic solvent for polyvinylidene fluoride and 60 to 90 wt.-% of a low-boiling polar organic solvent with a boiling point up to 120.

Abstract: A cyanoethylated resin to which adhesive properties and high dielectric constant are imparted by cyanoethylating a C.sub.2 -C.sub.4 olefin-vinyl alcohol copolymer, which is suitable for use as a dielectric material and an adhesive.

Abstract: A polyurethane corresponding to the formula: ##STR1## wherein Q is a divalent, mononuclear or dinuclear aromatic radial which is unsubstituted or is substituted by lower alkyl groups and which can contain, as a linking member, a lower alkylene group,X is one of the groups --O--Ph--Z--Ph--O-- and --OOC--(CH.sub.2).sub.y --COO--,Ph being an optionally substituted phenylene group,Z being an alkylene group having 1--4 carbon atoms andy being a number from 2 to 12,R is a hydrogen atom or a methyl group,Y is an alkylene radical having 2-6 carbon atoms,m is an integer from 4 to 50n is an integer from 1 to 6 ando is an integer from 4 to 20having the properties of thermolasts and being hardenable to give elastic products. It is suitable for use as a hardenable constituent of photopolymerizable materials.

Abstract: The properties of polymeric compositions can be improved by the presence of a polysiloxane unit of formula ##STR1## where Q is a substituted or unsubstituted aromatic group,Z is ##STR2## D is unsubstituted or substituted hydrocarbylene R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each, independently, is unsubstituted or substituted hydrocarbyl.x, y and z each independently has a value from 0 to 100.Polyimides containing these units display improved solubility and adhesion; they are useful, among other things as protective coatings.

Abstract: A coating and method of protecting a metal substrate from corrosion by applying a thin film of a liquid composition on the substrate and heating the wet film to an elevated temperature for a period of time to dry or cure the film and thereby adhere a protective coating to the substrate without the maximum temperature of the substrate exceeding about 500.degree. F. and preferably 450.degree. F. The composition contains a primary corrosion inhibitor of powdered metal dispersed in a bonding material of linear epoxy or phenoxy resin and a vehicle of active and inactive organic solvents. Preferably, the composition also includes secondary corrosion inhibiting resins, a thioxotropic material, a hygroscopic material, a powdered metal suspension agent, and a material to neutralize the acidity of the linear epoxy or phenoxy resin.

Abstract: A rubber-toughened addition-type polyimide composition having excellent high temperature bonding characteristics in the fully cured state and improved peel strength and adhesive fracture resistance physical property characteristics is disclosed. The process for making the improved adhesive involves preparing the rubber-containing amic acid prepolymer by chemically reacting an amine-terminated elastomer and an aromatic diamine with an aromatic dianhydride with which a reactive chain stopper anhydride has been mixed, and utilizing solvent or mixture of solvents for the reaction.

Abstract: A polyurethane corresponding to the formula: ##STR1## wherein Q is a divalent, mononuclear or dinuclear aromatic radial which is unsubstituted or is substituted by lower alkyl groups and which can contain, as a linking member, a lower alkylene group,X is one of the groups --O--Ph--Z--Ph--O-- and --OOC--(CH.sub.2).sub.y --COO--,Ph being an optionally substituted phenylene group,Z being an alkylene group having 1-4 carbon atoms and y being a number from 2 to 12,R is a hydrogen atom or a methyl group,Y is an alkylene radical having 2-6 carbon atoms,m is an integer from 4 to 50n is an integer from 1 to 6 ando is an integer from 4 to 20having the properties of thermoplasts and being hardenable to give elastic products. It is suitable for use as a hardenable constituent of photopolymerizable materials.

Abstract: Reverse osmosis membrane casting solution containing dimethyl formamide solvent and hydrated magnesium chloride salt.

Abstract: Thermosetting polycondensates containing amide and imide groups which are obtained by reacting 1,2,3,4-butanetetracarboxylic acid or its anhydride with one or more aliphatic, cycloaliphatic or aromatic diamines and one or more oxadicarboxylic acids or oxadicarboxylic acid esters of the general formulaROOC--CH.sub.2 --O--(CH.sub.2).sub.2 --O--.sub.n CH.sub.2 --COORwhere R is hydrogen or alkyl of 1 to 6 carbon atoms and n is 0 or an integer from 1 to 10, in a water-soluble organic solvent and/or water, at from 80.degree. to 200.degree. C. These polycondensates are useful as wire enamels, impregnating agents and adhesives.

Abstract: Nitrile barrier resin latexes containing a coalescing agent which (1) is a solvent for the nitrile barrier resin, (2) has a boiling point between 100.degree. and 300.degree. C., and (3) does not azeotrope with water are excellent oxygen barriers and have good chemical resistance when coated on various substrates. Especially effective coalescing agents are selected from the group consisting of dimethyl formamide, dimethyl acetimide, methyl pyrrolidone, dimethyl sulfoxide, glycol carbonate and tetramethylene sulfone.

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: Rheology modifiers useful in water and organic solvent-based compositions are derived from the reaction of polyalkylene oxide, polyfunctional material, diisocyanate, water and end-capping compounds in an organic solvent. The organic solvent is compatible with latex coating compositions.

Abstract: A flame retardant silicone rubber with improved flame retardant properties and colorability can be obtained from a polydiorganosiloxane, a silica filler, a carboxamide, a platinum, an organic peroxide, and optionally cerium oxide or cerium hydroxide.

Abstract: Stable, free-flowing dispersions in organic liquids of rubbers in the form of discrete particles having an average diameter of from 100 to 3,000 nm which contain: A--as rubber, from 1 to 20% by weight, based on the total dispersion, of a crosslinked diene rubber or a crosslinked, rubber-like acrylate polymer; B--from 0 to 15% by weight, based on the total dispersion, of water in the form of a water-in-oil emulsion; C--as the continuous organic phase, from 99 to 45% by weight, based on the total dispersion, of a mixture of from 95 to 60% by weight of a liquid aliphatic hydrocarbon having up to 20 carbon atoms; or C.sub.6 -C.sub.12 aromatic hydrocarbon or a halogen derivative thereof and from 5 to 40% by weight of a C.sub.1 -C.sub.12 alkanol, a ketone containing up to 8 carbon atoms, a formamide or a nitrile containing up to 6 carbon atoms, and a process for their manufacture.

Abstract: Air- and/or oven-drying lubricant paint compositions are disclosed which are useful for providing dry-film lubrication for substrates. The compositions comprise a binder resin dissolved in an organic solvent, optionally containing an extender, and further containing a polyalkylene wax which may be modified or unmodified. The dry-film lubricant provides a coefficient of friction which is lower, more uniform and of a narrower range than the compositions of the art.

Abstract: Fiber-treating compositions are described which durably provide water repellency and oil repellency for the treated fibers. These compositions comprise a cyclic siloxane bearing fluorinated hydrocarbon radicals and silicon-hydride atoms, and a dehydrogenation catalyst. Curing of the compositions occurs by a dehydrogenation condensation reaction between the silicon-hydride atoms and/or between the silicon-hydride atoms and the hydroxyl radicals of an optionally added hydroxyl-endblocked organopolysiloxane.

Abstract: Novel high molecular weight resins, useful for electrically insulating conductors, are prepared by polycondensing a mixture of anhydrides, and a diisocyanate and/or a diamine in an inert organic solvent, preferably in the presence of a catalytic amount of 2-methylimidazole.

Abstract: Polyethylene terephthalate resin compositions containing filler or reinforcing agent, a selected sodium or potassium salt of a hydrocarbon acid or a salt of a selected organic polymer containing pendant carboxyl groups, and a selected low molecular weight organic ester, ketone, sulfone, sulfoxide, nitrile or amide. Articles molded from the compositions have high gloss when molded at temperatures below 110.degree. C.

Abstract: Ink formulations for use in printing polyvinyl butyral sheets are described. The formulations comprise polyvinyl formal, and polyvinyl butyral sheets printed using the formulations are found to have a reduced tendency to exhibit blocking.

Abstract: A writing liquid is formed from a solvent for an organic styrene resin pigment in combination with a chlorofluoroalkane of from 1 to 3 carbon atoms. The potential toxicity of the solvent (or solvent vapors) is eliminated and writing speeds of the writing liquid are improved by the addition of the chlorofluoroalkane. The writing liquid is used for transparentizing an opaque layer of an organic styrene resin pigment, uniformly distributed as fine particles in a film-forming binder carried on a transparent or opaque support. When the writing liquid is applied to the opaque layer using a suitable writing instrument, such as a pen, the opaque layer immediately becomes transparent where it is contacted with the solvent.

Abstract: Rheology modifiers useful in water-based and organic solvent-based compositions are derived from the reaction of polyalkylene oxide, polyfunctional material, diisocyanate, water and a monofunctional active hydrogen-containing compound or monoisocyanate. The modifiers are characterized by having a branched structure, urea linkages and terminal hydrophobic groups.

Abstract: An improved solution of a polybenzimidazole suitable for use in the formation of shaped articles (e.g. fibers, films, and the like) is provided which includes a minor amount of an organo-lithium compound (as defined) which has been found to be capable of inhibiting the separation of the solution into phases of greater and lesser concentrations of the polybenzimidazole upon the passage of time. In a preferred embodiment the organo-lithium compound is lithium stearate. Not only is stability imparted to the solution prior to the formation of a shaped article, but the potential for catastrophic corrosive stress cracking of stainless steel equipment in contact with the solution is eliminated such as that which may occur following the extended use of the common prior art additive, lithium chloride.