Abstract: A novel graft copolymer capable of imparting to a polyolefin when blended therewith high tensile modulus and high sag resistance without increasing melt viscosity, and a method of making the same. The graft copolymer is a polyolefin having a relatively high weight-average molecular weight methacrylate polymer grafted thereto. The graft copolymer is formed by dissolving or swelling a non-polar polyolefin in an inert hydrocarbon solvent, heating to dissolve the polyolefin, and while stirring the mixture, adding a methacrylate monomer, together with an initiator to produce a constant, low concentration of radicals, to form a graft copolymer with a high molecular weight polymer chain covalently bonded or grafted to the polyolefin backbone. The graft copolymer can be separated from the solvent, isolated by volatilizing the solvent, for example in a devolatilizing extruder, and extruded into a desired shape such as a sheet, tube or the like. This graft copolymer can be blended with a poolyolefin matrix.

Abstract: Compositions comprising polyetherester resins, polyetherimide ester resins, alone or combined with polyester resins, and mixtures of any of them or of polyester resins alone with copolymers of alpha-olefins and vinyl esters of aliphatic monocarboxylic acids have improved elastomeric character. For example, addition of 50 and 30 parts by weight of a vinyl acetate-ethylene copolymer having a high content of units derived from vinyl acetate to a polyetherimide ester copolymer considerably improves compressibility, elasticity, low temperature impact strength, UV light resistance and chemical resistance. Articles shaped from such compositions show desirably lower hardness, improved dynamic fatigue properties, paintability, extrudability and injection moldability.

Abstract: Polymer alloys based on polybenzimidazoles are of great interest in industry due to their extraordinary thermal and mechanical properties. Alloys composed of a homo- or copolybenzimidazole and poly-N-vinylpyrrolidone are homogeneously mixed and have only one glass transition temperature.

Abstract: A motion transmitting remote control assembly (10) for transmitting motion in a curved path including a liner (12) disposed within a conduit (16) and a motion transmitting core element (14) moveably supported by the liner (12). The liner (12) is made essentially of polytetrafluoroethylene (PTFE). The assembly (10) is characterized by the liner (12) further including poly(amide-imide) for increasing the strength and lubricity thereof. Preferably, the liner comprises 97 weight percent polytetrafluoroethylene and 3 weight percent poly(amide-imide).

Abstract: Novel thermoplastic elastomeric molding compositions having excellent physical properties, which comprise a polyetherimide ester elastomer modified with a modifier composition comprising (i) at least one olefin acrylate copolymer; or (ii) at least one ethylene vinyl acetate copolymer; or a combination of (i) and (ii).

Abstract: A high strength synthetic resin based structural material in which a polymer having coil-like molecules is uniformly mixed with a second polymer having rigid rod-like molecules. This material is made, basically, by dissolving a thermoplastic matrix polymer having coil-like molecules in a suitable solvent, adding thereto thermosetting polymer reactants which then form a prepolymer. The rigid rod prepolymer may then be partially cyclized through heat or by the use of a chemical agent in order to reduce chain conformations. Excess cyclizing agent can then be removed and the mixture can be heated to complete polymerization to produce a high strength structure with rigid rod-like molecules intimately blended with the matrix coil-like molecules.

Abstract: A method of preparing a fiber reinforced elastomer by forming fibers therein in-situ and an elastomer made thereby are provided. In the method, a fiber forming material, preferably a high performance polymer, is dissolved in a compatible solvent to form a solvent/polymer mixture, and the mixture is added to the elastomer during compounding or mixing. The polymer is quickly dispersed into the elastomer, and the solvent rapidly evaporates. The shear of the mixer causes elongation of the polymer into fibers. The fibers may also be oriented by the shear of the mixer.

Abstract: Improved dispersant/VI improver luboil additives are produced by reacting a hydrogenated conjugated diene star polymer or block copolymer with an alpha, beta unsaturated carboxylic acid or derivative to form an activated star polymer, which is then reacted with a) an alkyl carboxylic acid and b) an alkylamine or alkane polyol, or with the preformed product of reactants a) and b).

Abstract: This invention relates to composites of fluorocarbon polymers, preferably polytetrafluoroethylene, which contain less than about 23% by weight polyamide-imide resin. More particularly, this invention relates to extrudable polytetrafluoroethylene composites which exhibit improved abrasion and friction resistance and other improved properties over a wide range of temperature and load conditions, and which are particularly adaptable for use as liners in wire insulation and in push-pull cable assemblies.

Abstract: The present invention provides a new vinyl chloride polymer coating material which can be top-coated with acid-catalyzed coating compositions at low curing temperatures without compromising the adhesion of the coating to the metal substrate and without inhibiting the cure of subsequently applied coating. In accordance with the present invention, a new plastisol coating composition comprises a finely-divided vinyl chloride polymer together with a plasticizer and from about 0.5 to about 5 percent by weight of a composition of an adhesion promoter which is a non-gelled condensation product ofa) a polymerized fatty acid; andb) a mixture of amines being present in a concentration to produce a final amine value that ranges up to about 225, said mixture being comprised of a polyalkylene polyamine and an N-aminoalkylpiperazine.In addition, the present invention provides a new and improved adhesion promoter for use in the aforesaid vinyl chloride polymer coating composition.

Abstract: Block copolymers which include polyisobutylene chain moieties of the formula: ##STR1## wherein n is an integer such that the moiety has a molecular weight contribution of from 5,000 to 30,000 Daltons as determined by gel permeation chromatography are obtained by block copolymerization of appropriate compounds of the formula: ##STR2## wherein n is as defined above and X represents hydroxyl, halogen or alkoxy, with polycarbonates, polyesters, polyamides, poly(ester-amides), polyarylates, polyetherimides or monomer precursors thereof. The block copolymers are useful thermoplastic molding compositions.

Abstract: A method of producing an impact modified polymer comprises dissolving a high-temperature polyetherimide and a high-temperature fluorelastomer in a common solvent to form a single phase solution which is heated to a temperature that would normally vaporize the solvent. The solution is maintained at an elevated pressure to avoid vaporization of the solvent. After being heated at the elevated temperature, the solution is subjected to flash evaporation by introducing the solution into a zone of reduced pressure. This forms a blend of the polyetherimide into which the fluorelastomer is micro-dispersed. A composition of matter formed by the method advantageously includes a solid component having 90% by weight ULTEM 1000 polyetherimide and 10% by weight VITON A fluorelastomer. Dimethyl formamide is advantageously used as the common solvent.

Abstract: The invention provides an aqueous coating composition curable at ambient temperature comprising a polyacetoacetate; a polyamino amide having an amine number of 60-1000; and either a nitroalkane, a formic acid ester, or an organic compound occurring in at least 2 tautomeric forms, and in one of the tautomeric forms a labile hydrogen atoms is linked to a carbon atom. A process of coating a substrate with such composition is also provided.

Abstract: Homogenous blends of polyetherimide polymers and ethylene vinyl acetate copolymers prepared by solution blending techniques or melt blending are characterized by high impact strengths. Further disclosed are laminates of polyetherimide and ethylene vinyl acetate copolymers that are characterized by strong bonding strengths between the layers of the laminates.

Abstract: A sonic window suitable for use in sonar applications wherein an elastomer such as natural or synthetic natural rubbers, a low air entrapping fiber or fibril used for reinforcement, fillers, and thermosetting resins are formed into desired window configuration. The low air entrapment associated with the fiber or fibrils produces a remarkably sonicly transparent window.

Abstract: This invention is a polyimide resin composition containing 100 parts by weight of polyimide having recurring units of the following formula: ##STR1## wherein Y is a bond, divalent hydrocarbon radical having from 1 to 10 carbons, hexafluorinated isopropylidene radical, carbonyl radical, thio radical, sulfinyl radical, sulfonyl radical or oxide, and R is a tetravalent radical of aliphatic radical having at least 2 carbons, alicyclic radical, monoaromatic radical, condensed polyaromatic radical, or noncondensed polyaromatic radical wherein aromatic radicals are mutually connected with a bond or a crosslinking function and from 5 to 100 parts by weight of fluororesin. The resin composition can provide molded products which are excellent in high-temperature stability, dimensional stability and mechanical strength and moreover have a low friction coefficient and good wear resistance. Therefore, the composition is useful as the material for electric and electronic devices, precision instrument parts etc.

Abstract: Tough, stain-resistant microwave cookware can be fabricated from an injection-moldable thermoformable blend, comprising:A. a thermoformable interpolymer, comprising at least one unsaturated dicarboxylic acid compound polymerized with at least one vinyl monomer, in an amount between about 25 and about 75 weight % based on the weight of the unfilled blend, andB. at least one thermoformable polymer, selected from the group consisting of polycarbonates (including polyestercarbonates), poly(aryl ether sulfone) resins, polyarylates, and polyetherimides in an amount between about 75 and about 25 weight % based on the weight of the unfilled blend.

Abstract: The invention relates to compositions of a soluble polyimide and polypyrrole. These compositions can preferably be prepared by anodic oxidation of pyrrole or a pyrrole derivative at electrodes coated with polyimide. They make it possible to prepare free standing electrically conductive films.

Abstract: Miscible blends of solids, non-crosslinked polymers are disclosed. The blends comprise from 2 to 95 parts by weight of a water-insoluble, hydrophobic polymer and, correspondingly from 98 to 5 parts by weight of a hydrophilic polymer. The blends are capable of absorbing at least their own weight in water.

Abstract: Nonmetallic bearing compositions contain a polyetherimide resin and, as a modifier, a fluoropolymer, such as polytetrafluoroethylene. The present compositions can be fabricated into a variety of shapes by injection molding, and have excellent wear resistance, load-bearing capabilities, and low coefficients of friction without the use of external lubrication.

Abstract: Novel flame retardant elastomeric materials are prepared by admixing a polyetherimide ester and a halogenated flame retarding material. Optionally these compositions may further comprise a modifier resin selected from condensation polymers and addition polymers, flame retardant synergists and drip suppressant.

Abstract: A polyamideimide resin composition is proposed which includes a polyamideimide resin, a polyetherimide resin and a fluororesin. The composition not only maintains high mechanical strength and electrical insulation of polyamideimide resin, but also has high thermal shock temperature even in a wet state, high antistick quality and melt-processability.

Abstract: The present invention relates to modified polyetherimide resins. Such resins contain high density polyethylene in an amount effective to raise the melt viscosity of the polyetherimide and reduce the tendency of the resin to stick to molds during injection molding.

Abstract: This invention is concerned with polyetherimide blends. More particularly the polyetherimide blend comprises a polyetherimide and a block copolymer of a vinyl aromatic hydrocarbon and a diene hydrocarbon, and a polyester to form a ternary blend.

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: Nylon-type polyamides are produced by the polycondensation of a non-wholly aromatic diacid and diamine in the presence of a poly(ethylene oxide) matrix.

Abstract: An undercoating composition for a fluorocarbon polymer coating comprising:(a) a modified tetrafluoroethylene polymer in the form of particles of double-layer structure having a core and a shell, the core comprising a tetrafluoroethylene homopolymer or a copolymer of tetrafluoroethylene with a fluorine-containing .alpha.-olefin, the shell comprising a copolymer of tetrafluoroethylene and said fluorine-containing .alpha.-olefin copolymerized therewith in a larger amount than in the core,(b) a copolymer of tetrafluoroethylene and said fluorine-containing .alpha.-olefin, and(c) an auxiliary adhesive agent selected from the group consisting of polyimide, polybismaleimide, polyamideimide and aromatic polyamide.

Abstract: Elastomeric compositions vulcanizable with peroxides, consisting of a fluoroelastomer based on vinylidene fluoride and containing small quantities of brominated or iodinated olefine as comonomer, admixed with from 1% to 25% by weight of perfluoropolyether or polycondensation derivatives thereof such as perfluoropolyamides.

Abstract: A process for preparation of filler-containing polytetrafluoroethylene fine powder by coagulating polytetrafluoroethylene together with at least one filler selected from the group consisting of polyimide resins, polyamide-imide resins, polyamide resins and carbon fiber powders from their aqueous dispersion, characterized in that a water-insoluble organic liquid having a boiling point of from 30.degree. to 150.degree. C. and a surface tension of not more than 35 dyne/cm at 20.degree. C. is added to the aqueous dispersion under agitation at any stage from the start to the end of the coagulation.

Abstract: What are disclosed are a method for the bonding of metallic materials and for producing coatings on metallic materials with a polyvinyl chloride plastisol which has improved adhesion at baking temperatures of 90.degree. C. and up and which contains, as an adhesion-improving additive, a condensation product of a polymerized fatty acid, a polycarboxylic acid having three or more COOH groups, an optional dicarboxylic acid, and an excess based on the carboxyl groups of the acid components, of a polyalkylene polyamine, and plastisols suitable for such a process.

Abstract: Disclosed are blends of (a) a polyetherimide and (b) a thermoplastic fluorinated polyolefin, or copolymer thereof. The blends have good flexural strength and flexural modulus and have a higher impact strength than those associated with the polyetherimide components of the blends.

Abstract: Disclosed are blends of (a) a polyetherimide and (b) a minor amount, e.g., about 1 to about 20 weight %, of polypropylene or copolymer thereof. Unexpectedly, these blends have a higher notched Izod impact strength than that associated with the polyetherimide component of the blends and those associated with other polyetherimide-polypropylene blends which do not contain a minor amount of polypropylene.

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: An additive flame retardant bisimide containing halogen atoms and ammonium acid tetrahalophthalate, e.g. N,N'-bis(2-ethylene tetrabromophthalimide) ammonium acid tetrabromophthalate. These compounds are useful in a variety of polymeric compositions and demonstrate increased thermal stability. They also foam on decomposition with the evolution of gas thus readily lending themselves to the preparation of flame retardant coatings.

Abstract: Disclosed are blends of (a) a polyetherimide and (b) a minor amount of an acrylate copolymer of C.sub.1 -C.sub.5 acrylate and C.sub.1 -C.sub.5 methacrylate. These blends have a higher impact strength than that associated with the polyetherimide component of the blends. In addition, the blends exhibit improved extrusion and molding performance characteristics over those of the polyetherimide component of the blend when molded alone.

Abstract: Disclosed are blends of (a) a polyetherimide and (b) a rubber modified vinyl aromatic polymer. Depending upon the particular rubber modified vinyl aromatic polymer used in preparing the blends, one or more of the properties of impact strength, heat distortion temperature, flexural properties and tensile properties of the blends are improved over those associated with the polyetherimide component alone or with the rubber modified vinyl aromatic polymer alone.

Abstract: Disclosed are blends of (a) a polyetherimide and (b) a minor proportion of an EPDM terpolymer. Among other things, these blends have a higher impact strength throughout the range of normal operating temperatures than that associated with the polyetherimide component of the blends.

Abstract: Cross-linking agents are produced by reacting an ester of a di- or poly-carboxylic acid with a molar excess of ammonium hydroxide, thereby forming a di- or polyamide, which in turn is then methylolated and etherified with a lower alkanol. These products are cross-linkers for resins such as alkyds, oil-free polyesters, acrylic which can be either acid or hydroxy functional, phenolics, epoxies or melamines.

Abstract: Water soluble cationic block copolymer comprising at least one first polymer block selected from a first class consisting of polymeric species having amino groups in the polymeric structure thereof wherein a majority of said amino groups are quaternary, and at least one second polymer block selected from a second class consisting of polymer species having amino groups in the polymeric structure thereof wherein a majority of said amino groups are other than quaternary amino acids. Also included are the methods of making these copolymers.

Abstract: The catalyst system disclosed herein comprises a combination or a chelate of a hydrocarbyl lithium compound with a dialkylaminoaldehyde dialkyl acetal having the formula R'.sub.2 N--A--CH(OR.sub.2) wherein R and R' are alkyl groups of 1-3 carbon atoms and A is a divalent aliphatic group of 1-10, preferably 1-3 carbon atoms, with a direct linkage of no more than 3 carbon atoms between the N and the --CH(OR).sub.2 group. This catalyst system is particularly useful in the polymerization of vinyl compounds such as ethylene, propylene, styrene, butadiene, etc. The process for the polymerization of conjugated dienes produces polymers of excellent properties. For example, with butadiene-1,3 and other appropriate conditions, polybutadiene with high percentages of 1,2-polybutadiene structure are produced.

Abstract: The copolymers disclosed herein comprise the reaction products of polyoxirane or polyepoxide compounds with amine-terminated aromatic polyimides. The reaction of the oxirane group with the amine group produces hydroxylamine groups which connect the polyimide portion with the polyepoxide precursor portion of the resultant copolymer without by-product formation. These copolymers are more tractable than the original unreacted amine-terminated polyimides and can be converted at appropriate lower temperatures to insoluble, infusible polymers. Thus they can be fabricated economically at lower temperatures and pressures and extend greatly the number of applications for which the aromatic polyimides can be employed.

Abstract: Fibrous-reinforced composites, such as prepregs and sheet moulding compounds, are made with a thermosettable unsaturated polyimide resin, a photopolymerizable compound, and a heat-activated curing agent for the resin. Fibers may be impregnated with a liquid mixture of the resin and the photopolymerizable compound, and irradiated to cause the mixture to solidify through photopolymerization. The product, when desired, e.g., after stacking to form a multilayer laminate or after shaping, is heated to cure the resin. Alternatively, the liquid mixture is irradiated to form a solid film, into which the fibers are pressed, and, when required, the assembly is heated to cure the resin. The resins employed contain at least two maleimide, citraconimide, or itaconimide groups linked through nitrogen atoms thereof to carbon atoms.

Abstract: Hydrophilic polyolefin fibers may be prepared, for example, by discharging a heated and pressurized solution of an anionic polyolefin composition containing carboxylic functionality into a zone of reduced temperature and pressure, and then modifying the fibers so produced by treatment with an aqueous admixture of selected cationic and anionic water-soluble, nitrogen-containing polymers. Blends of the hydrophilic fibers with wood pulp provide paper products having improved physical properties.

Abstract: An essentially linear polymer having a plurality of amide, imide and ester groups therein, which is the condensation product of (1) at least one polycarboxylic acid imide-forming reactant, (2) at least one ethylenically unsaturated polycarboxylic acid carboxypyrrolidone-forming reactant, (3) at least one polycarboxylic acid ester-forming reactant, (4) at least one glycoly, (5) at least one other polyfunctional hydroxyl compound, and (6) at least one polyfunctional amino compound having at least one primary amine group thereon. The equivalent molar ratio of the functional hydroxyl groups of the glycols and hydroxyl compounds to the functional ester-forming carboxyl groups of the acid reactants is from about 1.0 to 1 to about 3.0 to 1.

Abstract: A fire-retardant resin composition comprising(A) an aromatic copolyester derived from(1) a mixture of terephthalic acid and isophthalic acid or the functional derivatives thereof and(2) a bisphenol or the functional derivatives thereof,(B) a polyamide,(C) a polyalkylene phenylene ester or a polyalkylene phenylene ester ether and(D) an aromatic halogen compound. The resin composition has superior moldability, and molded articles prepared from the resin composition have superior chemical properties, thermal stability, mechanical properties and fire retardancy. The resin composition may additionally contain (E) a fire-retardant assistant.

Abstract: A hydrophilic polymer shaped article adapted for use as a soft contact lens is treated to provide at least on the surfaces thereof a modified, less hydrophilic polymeric structure inhibiting penetration by bacteria and proteins, whereby development of clouding and discoloration of the lens material during use is significantly retarded. Modification of the lens surfaces is effected by treatment of the lenses, either unhydrated or in a partially hydrated state, at a temperature ranging from room temperature to 100.degree. C. and for a time period of 1 to 24 hours, with a water-soluble mono- or poly-carboxylic acid selected from alpha-amino acids, such as arginine, cysteine, glycine and like acids, aliphatic dicarboxylic acids or aromatic dicarboxylic and tricarboxylic acids, such as malonic, maleic, glutaric, citraionic, itaconic acid and the like.