Abstract: A biodegradable polymer is provided for use in providing syringeable, in-situ forming, solid biodegradable implants for animals. The polymer is placed into the animal in liquid form and cures to form the implant in-situ. A thermoplastic system to form said implant comprises the steps of dissolving a non-reactive polymer in biocompatible solvent to form a liquid, placing the liquid within the animal, and allowing the solvent to dissipate to produce the implant. An alternative, thermosetting system comprises mixing together effective amounts of a liquid acrylic ester terminated, biodegradable prepolymer and a curing agent, placing the liquid mixture within an animal and allowing the prepolymer to cure to form the implant. Both systems provide a syringeable, solid biodegradable delivery system by the addition of an effective level of biologically active agent to the liquid before injection into the body.

Abstract: This invention relates to a solution or plasticized composition comprising one or more polyanilines, and one or more solvents capable of dissolving said polyanilines.

Abstract: A low volatile organic compound emitting thermoplastic pipe adhesive includes a resin, one or more solvents, a low specific gravity filler such as hollow ceramic spheres and a thixotropic agent for maintaining the homogeneity of the adhesive mixture.

Abstract: An improved pellicle for use in projection printing comprises a pellicle in which the transparent film is formed from a specific polyvinyl butyral resin from a casting composition which is a mixture of the specific polyvinyl butyral resin and dimethylformamide.

Abstract: The present invention relates to a polyimide resin composition and products, especially storage stable polyimide pre-pregs, manufactured therefrom with improved processing properties comprising (A) the reaction product of a polyimide, an alkenylphenol or an alkenylphenol ether, and tribromophenyl-maleimide, (B) an ionic or free-radical polymerization catalyst and (C) phenothiazine derivatives.

Abstract: Free-flowing, stable dispersions of crosslinked rubbers in the form of discrete particles having an average diameter of 0.1 to 3 .mu.m in organic liquids, containingI) up to 60% by weight (based on the dispersion as a whole) of a crosslinked, rubber-like, particulate graft polymer of a) a crosslinked silicone rubber as core and crosslinked acrylate rubber b) graft polymerized thereon as the rubber andII) a liquid, organic N,N-substituted amide as the continuous organic phase,and a process for their production.

Abstract: Provided is a silicone resin composition, which is curable at a temperature of not more than 270.degree. C., consisting essentially of a silicone ladder polymer expressed in the following general formula (I): ##STR1## where R.sup.1 to R.sup.4 represent hydrogen atoms or lower alkyl groups respectively, R.sup.5 and R.sup.6 represent aryl groups, alkyl groups or alkenyl groups with alkenyl groups occupying at least 2% of 2n groups R.sup.5 and R.sup.6, and n represents an integer of 5 to 1600, an organic solvent, and/or 0.2 to 20.0 percent by weight of a catalyst with respect to the silicone ladder polymer. This composition is cured at a temperature of not more than 270.degree. C., to form a thin film having excellent solvent resistance and heat resistance.

Abstract: A composition and a method for forming an anti-reflective layer for DUV microlithographic processes is disclosed. The compositions of the present invention includes a polymer dissolved in a suitable solvent. The polymers are polysulfone and polyurea polymers which possess inherent light absorbing properties at deep ultraviolet wavelengths. In accordance with the method of the present invention, these compositions are applied to a substrate to form an anti-reflective coating, and thereafter a photoresist material that is compatible with the anti-reflective coating is applied.

Abstract: Extended polymer compositions are provided which comprise polymers containing pendant functional groups of the formula: ##STR1## extended, i.e. admixed with a chalcogenide having the empirical formula ##STR2## wherein R.sub.1 is a divalent organic radical at least 3 atoms in length, X is organoacyl or cyano, A is a chalcogen, each of R.sub.9 and R.sub.10 is independently selected from hydrogen, NR.sub.11 R.sub.12, NR.sub.13 and monovalent organic radicals, at least one of R.sub.9 and R.sub.10 being NR.sub.11 R.sub.12 or NR.sub.13, each of R.sub.11 and R.sub.12 is independently selected from hydrogen and monovalent organic radicals, and R.sub.13 is a divalent organic radical. These compositions can be extended with significant proportions of the described chalcogenides with corresponding reductions in polymer concentration without significant loss of physical properties. The resulting combinations are particularly useful as binders and coatings.

Abstract: Anisotropic solutions are prepared from poly[2,2'-bis(trifluoromethyl)benzidine terephthalamide] or poly[2,2'-bis(1,1,2,2-tetrafluoroethoxy)benzidine terephthalamide] in amide solvents containing certain chlorides in specified amount. Crystalline fibers are prepared from the polymers.

Abstract: A silicone composition containing a carboxylic acid amide which develops a vapor pressure during its use in an electrical device prevents faulty conduction at electrical contacts which are caused by silicone vapor. Electrical devices made by bringing the vapor of the carboxylic acid in the presence of the silicone vapor exhibit extended useful lives.

Abstract: A heat resistant adhesive composition comprising a specific polyamic acid solution and a bis-maleimide compound exhibits flexibility and excellent heat resistance after bonding two material bodies, and therefore, it can be suitably used for producing of flexible metal-clad laminates, double-sided flexible metal-clad laminates, and multilayer printed circuit boards, and for attaching coverlay films to printed circuit boards.

Abstract: The present invention relates to filled elastomers which can be cured at low temperatures utilizing a quinoid/peroxide curing system in the presence of a select polar solvent accelerator. The select solvent accelerators which are utilized have the dual function of acting as both dispersing agents and curing accelerators. The instant invention herein includes the instant curing system, its use in a tire sealant composition, the puncture-sealing layer formed of the cured composition and the puncture-sealing tire.

Abstract: Compositions comprising linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon and certain polar additives containing at least two groups of substantial carbon number show improved processing properties. A method of improving the processing properties of the linear alternating polymer comprises incorporating therein at least one of the polar additives.

Abstract: Process for the preparation of polyaromatic compounds in which an aromatic dichloro compound, optionally in the presence of an anhydrous aprotic solvent, is reacted with metallic zinc, manganese or magnesium in the presence of a catalyst system of(1) from 0.1 to 25 mol-% (based on the dihalogen compound) of a nickel salt, nickel complex salt or nickel complex,(2) from 2 to 100 mol per mol of nickel in (1) of a triarylphosphine and optionally(3) from 0.1 to 10 mol per mol of nickel (1) of a halide, sulphate or phosphate of an alkali metal, alkaline earth metal, zinc, magnesium or manganese.

Abstract: A permanent antistatic resin composition which comprises 100 parts by weight of a block copolymer and from 0.1 to 2.0 parts by weight of an antistatic agent, said block copolymer comprising polymer blocks of a vinyl aromatic compound, polymer blocks of a conjugated diene compound and polymer blocks of a lactone compound, wherein the content of the vinyl aromatic compound is from 10 to 100% by weight and the content of the conjugated diene compound is from 0 to 90% by weight, provided that the sum of the vinyl aromatic compound and the conjugated diene compound is from 30 to 99% by weight, and the content of the lactone compound is from 1 to 70% by weight.

Abstract: A heat resistant adhesive composition comprising a specific polyamic acid solution and a bis-maleimide compound exhibits flexibility and excellent heat resistance after bonding two material bodies, and therefore, it can be suitably used for producing of flexible metal-clad laminates, double-sided flexible metal-clad laminates, and multilayer printed circuit boards, and for attaching coverlay films to printed circuit boards.

Abstract: Polyethers are disclosed which contain perfluoroalkyl groups and have the average formula ##STR1## wherein R.sup.1 is the same or different in the polymer mixture and represents hydrogen or a fluoro group,n has an average value of 4 to 12,a has an average value of 0 to 4,m has an average value of 2 to 18,x has an average value of 2 to 50 andy has an average value of 0 to 3.A method for the synthesis of the new polyols, which are usefull as surfactants and, with respect to the compounds of formula I, as polyol components in the synthesis of polyurethanes, is also disclosed.

Abstract: A solution polybenzimidazole which is resistant to phase separation contains: a polybenzimidazole; a solvent capable of dissolving the polybenzimidazole; and a minor amount of ammonium acetate.

Abstract: A corrosive resistant coating composition with improved weldability characteristics which is applied to a metal substrate as a wet film and then heated to dry and initiate curing to provide a protective coating tenaciously bonded to the substrate. The composition has corrosion inhibiting finely divided aluminum or stainless steel, a weldability agent of finely divided nickel, a primary bonding resin, and a vehicle of solvents. Preferably, the composition also has a secondary organic resin and thixotropic, metal suspension and hydroscopic agents.

Abstract: Copolyimides derived from the reaction product of 3,3'-6 F diamine or 4,4'-6 F diamine, at least one other diamine, and pyromellitic dianhydride can be rendered solvent soluble while at the same time exhibiting an improvement in both mechanical and electrical properties by the inclusion of at least one other dianhydride having a diaryl nucleus in the reaction media. Suitable such dianhydrides include bis (3,4 dicarboxy phenyl) ether dianhydride, 3,3'4,4' benzophenone tetracarboxylic dianhydride, 3,3',4,4' diphenyl tetracarboxylic acid dianhydride and 2,2 bis(3,4 dicarboxyphenyl) hexafluoropropane dianhydride (6F-DA). Such polyimides are soluble in common organic solvents such as methyl ethyl ketone or N-methyl pyrrolidone, and exhibit excellent film forming properties with improved mechanical and electrical properties as compared to the corresponding homopolyimides. They possess excellent heat stability (Tg's in excess of about 350.degree. C.

Abstract: Polyketone polymer composition comprising a major amount of an alternating copolymer of carbon monoxide and an olefinically unsaturated compound and a minor amount of at least one additive, selected from: (a) the acid amides of monocarboxylic or polycarboxylic acids having from 5 to 30 carbon atoms and being optionally N-monosubstituted or N,N-disubstituted with C.sub.1 to C.sub.4 alkyl groups, and (b) aluminum compounds of formula Al(OX).sub.3, in which X stands for a hydrogen atom or a C.sub.1 to C.sub.4 alkyl group.

Abstract: Molding compounds comprisign aromatic polyamides which contain from 0.01 to 10 mole % of a low molecular weight carboxylic acid amide display low melt viscosities and an increased resistance to hydrolysis and are thermoplastically processible.

Abstract: The present invention relates to solutions of polyamide-imides which can be spun and shaped, and to a process for their preparation.They contain 5 to 30% of a polyamide-imide in a solvent mixture comprising 40-80% by weight of butyrolactone and 20-60% of an aprotic amide solvent. They are obtained by the reaction, in butyrolactone as polycondensation solvent, of a diisocyanate, an aromatic acid anhydride, optionally an alkali or alkaline-earth metal dicarboxybenzenesulfonate, and optionally another aromatic diacid, the concentration of polyamide-imide being from 15 to 36%, followed by dilution in an amide solvent, at a temperature between 120.degree. and 165.degree. C.The solutions obtained are clear at room temperature, are storable, and possess improved color.

Abstract: Stable prepolymer solutions are made from partially cyclotrimerized 4,4'-thiodi(phenylcyanate) dissolved in cyclopentanone. The prepolymer solutions are used to make flame retardant and thermally stable laminates.

Abstract: A polyimide precursor suitable for use in the pseudo hot-melt prepregging process is described. It consists essentially of a mixture of (a) about 40 to about 70 percent by weight of a substantially equimolar mixture of (i) 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane or 2,2-bis[4-(3-aminophenoxy)phenyl]hexafluoropropane, or both, and (ii) lower alkyl diester of aromatic tetracarboxylic acid; (b) about 2 to about 50 percent by weight of polyamide (polyamic acid or ester) producible from components (i) and (ii); and (c) about 10 to about 50 percent by weight of solvent with the proviso that the mixture is a clear resinous solid at 25.degree. C. and is a viscous, tacky, varnish-like liquid at a temperature falling in the range of 40.degree. C. to 100.degree. C. Also described are use of the polyimide precursors in preparing coated paper webs useful in preparing paper-backed prepregging tape, and use of the coated paper webs in preparing the paper-backed prepregging tapes.

Abstract: A silicone rubber composition comprising an organopolysiloxane and a curing catalyst for the organopolysiloxane. The releasing property of the composition is significantly improved by the addition of N,N'-alkylene bisamide having not less than 10 carbon atoms. The composition is particularly effective for molding in a mold or covering a wire core.

Abstract: A novel thermoplastic composition is prepared by intimately mixing a polyurethane component with a selected reinforcing amount of a rod-like aromatic polyamide component. The composition exhibits unexpected tensile and modulus properties.

Abstract: Novel copolyimides are prepared by reacting one or more aromatic dianhydrides with a meta-substituted phenylene diamine and an aromatic bridged diamine. The incorporation of meta-substituted phenylene diamine derived units and bridged aromatic diamine derived units into the linear aromatic polymer backbone results in a copolyimide of improved flexibility, processability, and melt-flow characteristics. The novel copolyimides are especially useful as thermoplastic hot-melt adhesives.

Abstract: The invention involves modeling and molding extruded compositions comprising previous extruded polycaprolactone extrusion blended with a small amount of a detackifier comprising a fatty acid salt or amide.

Abstract: Soluble maleimide resins comprise a mixture of maleimides and maleamic acids, e.g. greater than about 45% bismaleimide and up to about 40% bis-maleamic acid. Such resins are soluble in solvents such as acetone, methyl ethyl ketone and toluene. Stable resin solutions comprise a minor amount of polyamine.

Abstract: Solutions of maleimide resins comprising a mixture of bismaleimides and low but solubilizing amounts of maleamic acids are provided at high solids levels, e.g. at least about 50%. Such solutions which comprise common solvents such as acetone, methyl ethyl ketone and toluene are useful in preparing laminates based on bismaleimide resins.

Abstract: (1) Curable bisimide resins comprise a mixture of(a) 5 to 95% of at least one bisimide of the general formula I ##STR1## in which B represents a divalent radical containing a carbon-carbon double bond and A is a divalent radical containing at least two carbon atoms and(b) 95 to 5% of a polyhydantoin polymer of formula II ##STR2## wherein R.sub.1 represents an aromatic hydrocarbon radical, R.sub.2 represents hydrogen or an alkyl group having 1 to 6 carbon atoms, R.sub.3 represents an aromatic hydrocarbon radical, an alkyl radical having 4 to 10 carbon atoms optionally interrupted by one or more oxygen or sulphur atoms, and X is an integer of from 20 to 5000.

Abstract: A synthetic resin matrix system for the delayed and extended duration delivery of drugs to humans and animals is disclosed consisting of a polymer, such as poly(2-hydroxyethylmethacrylate), referred to as PHEMA, an organic solvent, such as polyethylene glycol (PEG), and a hydrogen binding plasticizer, such as dimethylsulfoxide (DMSO). The plasticizer regulates the set-up time of the synthetic resin so that the more plasticizer present, the shorter the set-up time. The plasticizer also has a direct shortening effect upon the cure time and also profoundly influences many of the physical characteristics of the resultant synthetic resin matrix system. A variety of drugs can be embodied in the fabricated matrix system and administered to the patient (or animal) by different modes of application, including but not limited to oral, topical, rectal, subcutaneous implant, or organ-specific implant such as in the conjunctival sac of the eye.

Abstract: A synthetic resin matrix dressing is disclosed consisting essentially of a polymer, such as poly(2-hydroxyethylmethacrylate), referred to as PHEMA, an organic solvent, such as polyethylene glycol (PEG), and a hydrogen bonding plasticizer, such as dimethylsulfoxide (DMSO). The plasticizer regulates the set-up time of the synthetic resin so that the more plasticizer present, the shorter the set-up time. The dressing may be applied to the treatment site in veterninary use in the form of a paste for the in-situ curing or setting thereof, or the dressing may be preformed and then applied to the treatment site. A variety of drug agents may be incorporated in the synthetic resin matrix so as to result in the time released administration of the drug agent to the area of the skin covered by the dressing. A method of treatment using this dressing is also disclosed.

Abstract: Highly functional fluorinated polyisocyanates of the formula: ##STR1## wherein Z.sub.1 represents the functional group --O--CO--NH--R--NCO;Z.sub.2 represents the difunctional group --O--CO--NH--R--NH--CO--O--;R.sub.f is a radical derived from fluoropolyethers having a molecular weight between 500 and 7000;T represents a trivalent or tetravalent radical derived from a polyol;q is zero or 1; ands is 1 or 2.Also, varnishes containing said highly functional fluorinated polyisocyanates of formula (I).

Abstract: A resin composition which consists essentially of a thermoplastic resin, in which are included an alkali metal salt, and at least one kind of substances selected from the group consisting of vinylidene fluoride resin and dipolar aprotic solvents.

Abstract: Disclosed is a composition comprising about 5 to about 95 phr of a polyepoxide or other resinous component, about 20 to about 90% of an aprotic solvent, about 5 to about 95 phr of a polyimide having sufficient amic acid functionality to be soluble in the solvent, and sufficient water to hydrolyze the polyimide. A laminate is made from the composition by heating it until the amic acid functionality is substantially eliminated, then impregnating a fibrous substrate with the composition, heating the impregnated substrate to evaporate the solvent and B-stage the composition and form a prepreg, forming a stack of the prepregs, and heating and pressing the stack of prepregs to cure the composition. A wire enamel can also be made from the composition.

Abstract: A fast-curing, melamine-modified phenolic laminating resin is described comprising the co-condensation product of aldehyde, phenol and melamine in a water-soluble organic solvent. The modified laminating resin exhibits sufficiently high penetration and curing characteristics for use in a low pressure, continuous laminating process.

Abstract: Carbonate polymer compositions are rendered gamma ray resistant by the incorporation of 5 to 20,000 ppm of one or more sorbate compounds. The compositions of the invention have a reduced yellowing after exposure to cobalt 60 radiation. Examples of useful sorbate compounds are sorbic acid, sorbic acid amides, esters and the like. The addition of hindered phenolic compounds renders the sorbate compounds more effective.

Abstract: Polyamic acids prepared from the condensation of dianhydrides (or trianhydrides) and diamines and preferably dissolved in a suitable solvent produce polyimide shaped articles (e.g. films) relatively free of voids, pinholes, cracks and bubbles when about 0.75 to about 5 mole percent of a polysiloxane is incorporated in the backbone of the polyamic acid.

Abstract: A copolymer formed from an isoimide oligomer and another compound, such as an aryl sulfone, each of which has reactive functional terminal groups, such as ethylenic or acetylenic groups. The isoimide oligomer is soluble in the other compound, unreactive with the compound below a certain temperature and forms a liquid blend therewith. Upon heating the liquid blend above that certain temperature, the terminal groups on the isoimide oligomer and the other compound react with each other to form a copolymer. The liquid blends may be used to form encapsulants, coatings, films, and resin matrices for composites to provide resins with excellent high temperature properties.

Abstract: A fast-curing, melamine-modified phenolic laminating resin is described comprising the co-condensation product of aldehyde, phenol and melamine in a water-soluble organic solvent. The modified laminating resin exhibits sufficiently high penetration and curing characteristics for use in a low pressure, continuous laminating process.

Abstract: A soluble imide oligomer represented by the general formula ##STR1## (Definitions of R, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are found in the specification.) and its preparation process are presented. A coating solution for electronic materials containing said soluble imide oligomer is also presented.

Abstract: A casting solution of polyaramide in N,N-dimethylacetamide containing about 10 to 60% by wt. MgCl.sub.2, based on polyaramide, and a process for making such casting solution, are provided. An asymmetric permselective membrane and process for making such membrane from the casting solution are also provided. Such membrane has excellent performance characteristics in a reverse osmosis process for purifying salt water.

Abstract: A medium for electrophoresis in the form of an aqueous gel comprising an acrylamide copolymer having at least one specifically selected repeating unit; and a compound containing at least one carbamoyl group such as urea or formamide which serves as modifier.

Abstract: Melt-fusible polyimides based on pyromellitic dianhydride and at least one defined aromatic diamine are useful in making low-void composites and thermoplastic tapes, which can be fabricated into articles such as, for example, aircraft and autobody panels, printed circuit boards, etc. Some of these polyimides are melt-processible and can be fabricated by conventional procedures such as extrusion and injection molding.

Abstract: A synthetic resin wound dressing (e.g., a burn wound dressing) is disclosed consisting essentially of a polymer, such as poly(2-hydroxyethylmethacrylate), referred to as PHEMA, an organic solvent, such as polyethylene glycol (PEG), and a hydrogen binding plasticizer, such as dimethylsulfoxide (DMSO). The plasticizer regulates the set-up time of the synthetic resin so that the more plasticizer present, the shorter the set-up time. The dressing may be applied to the wound site in the form of a paste for the in situ curing or setting thereof, or the dressing may be preformed and then applied to the wound site. A variety of drug agents (e.g., silver sulfadiazine) may be incorporated in the synthetic resin so as to result in the time released administration of the drug agent to the area of the skin (e.g., a burn wound site or the like) covered by the wound dressing. A method of treatment using this dressing is also disclosed.

Abstract: A novel copolymer comprising(a) repeating units of the formula:--OCH[(CH.sub.2).sub.p R.sub.f ]CH.sub.2 -- (Ia)or--OCH.sub.2 CH[(CH.sub.2).sub.p R.sub.f ]-- (Ib)wherein R.sub.f is C.sub.3 -C.sub.21 perfluoroalkyl and p is an integer of 1 to 10 and(b) repeating units of the formula:--(OCH.sub.2).sub.m (CH.sub.2).sub.n -- (II)wherein m is an integer of 1 to 4 and n is an integer of 2 to 10 when m is 1, an integer of 1 to 8 when m is 2 or an integer of 0 to (12-2m) when m is 3 or 4,--OCH.sub.2 CR.sup.1 R.sup.2 CH.sub.2 -- (III)wherein R.sup.1 and R.sup.2 are each hydrogen, CH.sub.3, CH.sub.2 Cl, CH.sub.2 F, CH.sub.2 OCH.sub.3, CH.sub.2 OC.sub.2 H.sub.5, CH.sub.2 OCOCH.sub.3, CH.sub.2 OC.sub.6 H.sub.5, CH.sub.2 OH or CH.sub.2 CN provided that at least one of them is not hydrogen,--OCH.sub.2 (OCH.sub.2 CH.sub.2).sub.q -- (IV)wherein q is 2 or 3, and/or--[(R.sup.3).sub.r --COO]-- (V)wherein R.sup.3 is CH.sub.2 or CF.sub.

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.