Abstract: Heat-curable bismaleimide resins contain a bismaleimide, an aromatic dialkenyl compound as comonomer and also from 1 to 40% by weight of a monoalkenyl compound, preferably 2-hydroxy-3-allylbiphenyl, as reactive diluent.

Abstract: Polymeric flame retardants comprise halogenated aromatic compounds having acylamino functional groups which are chemically bonded to cyclic imide-containing or imide-forming polymers or copolymers. The polymeric flame retardants are prepared by the reaction of halogenated aromatics containing a reactive hydrazido group with some or all of the anhydride groups of an cyclic alpha, beta-unsaturated dicarboxylic acid anhydride polymer or copolymer to form pendant halogenated-aromatic-substituted imide or amic acid groups. In addition, polymeric film retardants are used to render thermoplastic resins less flammable under conditions which promote combustion. Novel flame retardant hydrazides are disclosed.

Abstract: Ethylenically unsaturated cyclic ortho esters are prepared by the reaction of a hydroxy-substituted cyclic ortho ester such as 4-hydroxymethyl-2-methoxy-2-methyl-1,3-dioxolane with acryloyl chloride, methacryolyl choride, vinylbenzyl chloride or the like. They form polymers, especially EPDM graft copolymers, which are useful in the formation of copolymer-containing compositions with polyesters, polyamides and the like. The copolymer-containing compositions have excellent physical properties and may be employed to compatabilize blends of the same polymers.

Abstract: The subject invention provides a composition having excellent extrusion characteristics comprising a difficulty-melt-processible polymer and 0.002-0.5 wt. % of one or more fluoropolymer process aids wherein the fluoropolymer has a fluorine to carbon ratio of at least 1:2, is capable of forming a die-coating film under the prevailing conditions of extrusion temperature and pressure, and contains an effective amount of polar functional polymer chain end groups, --W, wherein --W is selected from --COF, --SO.sub.2 F, --SO.sub.3 M, --OSO.sub.3 M, --COOR, and --COOM, wherein R is C.sub.1-3 alkyl and M is hydrogen, a metal cation, preferably an alkali or alkaline earth metal cation, or a quaternary ammonium cation.

Abstract: Tough, high melt flow, low molecular weight polyamide compositions containing toughening polymers are obtained by blending conventional polyamides with the toughening polymer and then mixing the blend with very low molecular weight polyamides which are capable of reacting with the conventional polyamide by transamidation.

Abstract: A thermoplastic methacrylimide-containing polymer comprising 2 to 100% by weight of structural units represented by the following formula (I): ##STR1## wherein R is hydrogen or a hydrocarbon group having 1 to 20 carbon atoms, and 0 to 98% by weight of structural units derived from an ethylenically unsaturated monomer, wherein the content of iron in the polymer is not larger than 20 ppm and the difference between the maximum value and minimum value of the degree of imidization is preferably not larger than 5% by weight. This methacrylimide-containing polymer is used alone or as a blend thereof with another thermoplastic polymer.

Abstract: Partially grafted flexible thermoplastic compositions formed by melt blending under high shear, a thermoplastic material having available graft sites, said thermoplastic material being at least one continuous phase of the composition, an ethylene copolymer containing an unsaturated mono-carboxylic acid, and a polymeric grafting agent having reactive groups capable of reacting with the mono-carboxylic acid in the ethylene copolymer and with the available graft sites in the thermoplastic material. These compositions have use in a wide range of molding, coating and adhesive applications, including various automotive applications, wire and cable coating applications and high temperature adhesive applications.

Abstract: Fibers are disclosed which consist of a combination of para-aramid and poly(vinyl pyrrolidone). The fibers exhibit improved strength and greatly improved dyeability as well as improvements in several other characteristics.

Abstract: Thermoplastic molding materials contain, as essential components,A) 20-98% by weight of a partly aromatic amide copolymer essentially consisting ofa.sub.1) 40-90% by weight of units derived from terephthalic acid and hexamethylenediamine,a.sub.2) 0-50% by weight of units derived from .epsilon.-caprolactam anda.sub.3) 0-60% by weight of units derived from adipic acid and hexamethylenediamine,components a.sub.2) and/or a.sub.3) accounting altogether for not less than 10% by weight of the total number of units,B) 2-80% by weight of a partly crystalline thermoplastic polyamide which differs from A)and furthermoreC) 0-50% by weight of an elastomeric impact modifier andD) 0-60% by weight of fibrous or particulate fillers or a mixture of these.

Abstract: An agent is provided which renders compatible at least two incompatible thermoplastic polymers. The agent contains one di- or trisequenced copolymer comprising at least one N-vinyl-pyrrolidone or methyl (meth) acrylate telomer and one mono- or difunctional oligomer selected from the group consisting of an ethylenically unsaturated polymerizable monomer, or a polycondensable monomer, or a lactam. The agent is prepared by condensation of the telomer with the oligomer and is used in the preparation of alloys of incompatible thermoplastic polymers.

Abstract: A thermoplastic resin composition having a flexural modulas as defined in ASTM D790 of from 500 to 15,000 kg/cm.sup.2, which is obtainable by partial crosslinking upon melt kneading a mixture comprising:(A) from 20 to 60 parts by weight of a polyamide resin; and(B) from 80 to 40 by weight of an ethylene copolymer comprising (a) from 40 to 90% by weight of an ethylene unit, (b) from 5 to 60% by weight of an .alpha.,.beta.-unsaturated carboxylic acid alkyl ester unit, and (c) from 0.3 to 10% by weight of a maleic anhydride unit or a partially ionized maleic anhydride unit; with(C) from 0.01 to 20 parts by weight, based on 100 parts by weight of the sum of the components (A) and (B), of a polyfunctional compound containing at least two functional groups which are reactive to a carboxyl group, a carboxylic anhydride group, or an amino group, in the molecule thereof, is disclosed.

Abstract: A thermoplastic resin composition is disclosed, which is obtained by melt-kneading (A) from 60 to 97 parts by weight of a polyamide resin and (B) from 3 to 40 parts by weight of an ethylene copolymer comprising (a) from 40 to 90% by weight of an ethylene unit, (b) from 5 to 60% by weight of an alkyl .alpha., .beta.-unsaturated carboxylate unit, and (c) from 0.3 to 10% by weight of a maleic anhydride unit and then melt-kneading the resulting composition with (C) from 0.01 to 20 parts by weight of a polyfunctional compound having at least two functional groups having reactivity to a carboxyl group, a carboxylic acid anhydride group or an amino group per molecule to effect partial crosslinking reaction. The composition provides molded articles having a good balance of physical properties and satisfactory appearance.

Abstract: An aqueous dispersion comprising one or more 2,2,6,6-tetraalkylpiperidine compounds having a molecular weight 2000 or less than 2000 and a melting point of 100.degree. C. or more, one or more cationic, non-ionic and/or anionic dispersing agents and an aqueous medium. These dispersions are suitable for use as light stabilizers in aqueous systems.

Abstract: Glutarimide polymers having an acid and anhydride content lower than the acid and/or anhydride content normally present in the glutarimide polymers. Blends of the reduced acid and anhydride glutarimide polymers with thermoplastic materials are disclosed. A process for altering the properties of imide polymers by reducing or substantially removing acid and anhydride levels normally present in the imide polymer is also disclosed.

Abstract: It is desirable to increase the modulus of rubbers utilized in a wide variety of applications. This invention discloses a technique for modifying rubbers to improve their modulus without sacrificing other properties. The subject invention more specifically relates to a process for preparing a rubber composition having a high modulus which comprises reacting at least one epoxidized rubber with from about 2 phr to about 55 phr of at least one nylon at a temperature which is within the range of about 140.degree. C. to about 300.degree. C.

Abstract: Thermoplastic molding materials contain(A) from 5 to 95% by weight of a nylon and(B) from 5 to 95% by weight of a copolymer composed of(B.sub.1) from 50 to 99.9% by weight of a styrene of the general formula I ##STR1## where R.sup.1 is alkyl or 1 to 4 carbon atoms or hydrogen, R.sup.2 is alkyl of 1 to 6 carbon atoms or halogen and m is 0, 1, 2 or 3,(B.sub.2) from 0.1 to 30% by weight of a monomer containing epoxide groups (II) ##STR2## or of a monomer containing lactam groups (III) ##STR3## or of a monomer containing halobenzyl groups (IV) ##STR4## where R.sup.3 is a divalent, branched or straight-chain alkyl group of 2 to 15 carbon atoms, R.sup.4 is alkyl of not more than 6 carbon atoms, X is halogen, n is 1, 2 or 3 and r is 0, 1, 2 or 3, and(B.sub.3) from 0 to 48% by weight of further comonomers.

Abstract: A polyester resin composition having excellent gas barrier properties and transparency which comprises 100 parts by weight of a thermoplastic polyester resin (A), 1 to 100 parts by weight of a polyamide resin having metaxylylene group (B) and 0.01 to 50 parts by weight of a compatibilizing agent (C); and a polyester hollow molded article in the form of a single or multi-layered hollow molded article, wherein at least one of the layers is made of the above polyester resin composition.

Abstract: Resin compositions of (A) 50-95 percent by weight of a polyamide and (B) 5-50 percent by weight of a modified polyolefin containing in side chains 0.005-5 molar percent of functional groups expressed by formulas (I) and/or (II) below and 0.005-5 molar percent of functional groups expressed by formulas (III) and/or (IV) below provide molds having a high impact resistance and are applicable to automobile parts. ##STR1## Where R.sub.1 represents hydrogen or methl and wherein R.sub.2, R.sub.3 and R.sub.4 represent hydrogen, aliphatic, alicyclic or aromatic residual groups having 1-30 carbon atoms.

Abstract: Thermoplastic molding materials contain, as essential components,(A) from 40 to 95% by weight of a nylon and(B) from 5 to 60% by weight of a noncrosslinked copolymer based on(a) from 55 to 79.5% by weight of ethylene,(b) from 20 to 40% by weight of one or more primary or secondary C.sub.2 -C.sub.8 -alkyl esters of acrylic acid or methacrylic acid,(c) from 0.49 to 8% by weight of a monomer having an acid functional group or a latent acid functional group, or of an epoxy-containing monomer of an ethylenically unsaturated monocarboxylic acid, and(d) from 0.01 to 2% by weight of an ethylenically unsaturated dicarboxylic acid or of an anhydride of such an acid.

Abstract: Elongated granules of reinforcing fibers extending generally parallel to each other longitudinally of the granule each of said fibers being substantially surrounded by a thermally stable, film forming thermoplastic adhesive comprising(a) a poly(C.sub.2 -C.sub.6 alkyl oxazoline) in combination with(b) a poly (vinylpyrrolidone), provide complete dispersion of the fibers in thermoplastics during an injection molding cycle, conserving physical properties and providing significantly better EMI shielding than prior art extruder compounded resin/fiber blends.

Abstract: An optical resin material comprising at least two constituent units each having positive and negative main polarizability differences of at least 50.times.10.sup.-25 cm.sup.3 in terms of absolute values has small birefringence and good water absorbance, heat resistance and moldability.

Abstract: A novel thermoplastic resin composition is provided. It has excellent balance in the physical properties and is usable as shaped articles, sheets and films having excellent appearance in uniformity and smoothness. The thermoplastic resin composition is a blend of a resin composition (D) defined below and a copolymer (C) containing epoxy group, said (D) being composed of modified polypropylene by unsaturated carboxylic acid or anhydride thereof with or without unmodified polypropylene, and polyamide resin. The copolymer (C) is composed of an unsaturated epoxy compound and ethylene, with or without an ethylenically unsaturated compound other than ethylene.

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: Vinyl pyridines including vinyl stilbazole materials and vinyl styrylpyridine oligomer materials are disclosed. These vinylpyridines form copolymers with bismaleimides which copolymers have good fire retardancy and decreased brittleness. The cure temperatures of the copolymers and substantially below the cure temperatures of the bismaleimides alone. Reinforced composites made from the cured copolymers are disclosed as well.

Abstract: A resinous composition, having excellent toughness, flexibility, heat resistance and moldability, comprises (A) from 5 to 98% by weight of a polyamide and (B) from 95 to 2% by weight of a polyolefin modified with from 0.001 to 10% by mole based on all polymer components of a component having at least one functional group selected from the groups represented by the following general formulas (I), (II) and (III); ##STR1## wherein R.sub.1 denotes an organic group and R.sub.2, R.sub.3, R.sub.4 and R.sub.5 denote a group selected from the groups consisting of hydrogen atom and organic group respectively.

Abstract: The char residue formation of molded compositions, upon combustion, is improved by incorporating into the moldable composition a char-forming polymer containing recurring units of at least one monomer capable of undergoing tautomerization, at least one monomer capable of undergoing a nucleophilic substitution reaction by said monomer capable of undergoing tautomerization and, optionally, at least one additional copolymerizable monomer.

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: A polymeric material which is superior in mechanical strength, dimensional stability, moldability and resistances to chemicals, heat and abrasion comprises a copolymer composed of polymer chain moieties of a copolymer containing an imide compound of an .alpha.,.beta.-unsaturated dicarboxylic acid and polymer chain moieties of a polyamide, both chain moieties being bonded to each other. The material may be blended with thermoplastic resins. Furthermore, the material may be reinforced with glass fiber, etc.

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: Amorphous thermoplastic polyamide can be combined with semicrystalline thermoplastic polyamides and toughening agents to produce molding blends having good notched Izod values in molded form.

Abstract: A curable resin composition comprising (i) a catalytic composite comprising a peroxide and other catalytic component and (ii) a mixture or a preliminary reaction product of (a) a polyfunctional cyanate ester, prepolymer of the cyanate ester or coprepolymer of the cyanate ester and an amine and (b) a polyfunctional maleimide, prepolymer of the maleimide or coprepolymer of the maleimide and an amine and optionally (c) other component is disclosed. The composition cures rapidly at a low temperature and is preferable from view point of quantity production and workability. The composition is excellent in respect of adhering property, heat-resistance, moisture-resistance and chemical-resistance, and is useful for preparing laminated products, molded products, paint, powder paint, adhesive or varnish.

Abstract: A curable composite direct filling composition, comprising a polymerizable resin containing at least one acrylic monomer and a finely divided organic filler having an Izod milled notch strength of at least about 1 joule/cm and a flexural strength of at least about 34 MPa.

Abstract: Adhesive blend of wood rosin and a thermoplastic graft copolymer prepared by heating for about 15 seconds to 60 minutes, with mixing, a trunk copolymer of at least two monomers, at least one of said monomers providing amine-reactive sites taken from the group consisting of the anhydride group, e.g., maleic anhydride; a vicinal pair of carboxylic groups and a carboxylic acid adjacent to an alkoxycarbonyl group, wherein the alkoxy group contains up to 20 carbon atoms, and at least one of said monomers containing no amine-reactive sites, and at least one side chain polymer having per chain one active amine site taken from the group consisting of primary and secondary amines, the remainder of said side chain polymer being substantially unreactive with the reactive sites, e.g., amino-substituted polycaprolactam, polylaurolactam, polyethylene oxide, etc., of the trunk copolymer.

Abstract: Rubber compounds are readily bonded to tire cords using a dip process in which the dip contains an alkaline aqueous dispersion of a mixture of a major amount by weight of a rubbery vinyl pyridine/styrene/butadiene copolymer and a minor amount of a lignin amine-resorcinol-formaldehyde reaction product.

Abstract: Elastoplastic compositions are described comprising blends of cross-linked rubber and thermoplastic polyamide.