Abstract: The invention relates to polymer mixtures which comprise a polyphenylene ether, a polyamide and an agent to improve the impact resistance.

Abstract: A polyamide resin composition including 100 parts by weight of a resin composition containing of 20 to 80% by weight of an aromatic polyamide resin and 80 to 20% by weight of a modified polyphenylene ether resin (the total amount in % by weight of the aromatic polyamide resin and the modified polyphenylene ether resin being 100% by weight) and, incorporated in the resin composition, 0.5 to 30 parts by weight of a liquid-crystalline polymer, 0.01 to 3 parts by weight of a compatibilizing agent and 2 to 40 parts by weight of an inorganic filler and optionally a rubber component. The plate thickness of the resin molded articles may be reduced to 2 mm or less, and even further to 1 mm or less without deterioration of the properties thereof.

Abstract: Alloys of nylon 4.6 having good thermal stability above their melting points and a broad range of desired properties are prepared by melt mixing nylon 4.6 with at least one other nylon and a nylon copolymer. The inclusion of a copolymer in the alloy provides unexpectedly large increases in ductility and toughness.Alloys can be formulated with a unique combination of properties including, for example, elongations of at least 100%, Gardner impact strengths of at least 30 joules, tensile strengths of at least 80 MPa, and heat deflection temperatures of at least 85.degree. C.

Abstract: A polyimide resin composition for sliding members which has high heat resistance and sliding properties and excels in wear resistance under sliding conditions at high PV values and which can keep low the rate of shrinkage due to crystallization treatment. The composition is made up of 100 parts by weight of resin composition comprising 50-90% by weight of a thermoplastic polyimide resin and 50-10% by weight of graphite obtained by graphitizing a non-phenolic resin material and containing 97% or more of fixed carbon; 5-20 parts by weight of tetrafluoroethylene resin; and 5-30 parts by weight of a powdery hardened phenolic resin.

Abstract: The invention describes a thermoplastic composition made of a continuous phase made of crystalline thermoplastic resin A, a dispersed phase made of polyphenylene ether resin B, and an amide compound C represented by formula 1,R.sub.4 --CONH--R.sub.2 --HNOC--R.sub.1 --CONH--R.sub.3 --HNOC--R.sub.5( 1)wherein R.sub.1, R.sub.2, and R.sub.3 represent divalent hydrocarbon groups, which may be identical or different, and R.sub.4 and R.sub.5 represent monovalent hydrocarbon groups, which may be identical or different. The amide compound is present in an amount between about 0.1 and about 30 parts by weight per 100 parts by weight of the resins A and B mixed together.

Abstract: The present invention relates to polyisocyanate mixtures which are solid below 40.degree. C. and liquid above 125.degree. C. and which havea) an average isocyanate functionality of at least 2.1,b) a content of free isocyanate groups bonded to tertiary (cyclo)aliphatic carbon atoms (calculated as NCO; molecular weight=42) of 5 to 22 wt. %,c) a urethane group content calculated as --NH--CO--O--; molecular weight=59) of 2 to 30 wt. %,d) an isocyanurate group content (calculated as C.sub.3 N.sub.3 O.sub.3 ; molecular weight=126) of 0 to 30 wt. % ande) a carboxylic acid ester group content (calculated as --CO--O--; molecular weight=44) of 0 to 25 wt. % and/orf) a carbonate group content (calculated as --O--CO--O--; molecular weight=60) of from 0 to 34 wt. %with the proviso that the total amount of ester groups e) and carbonate groups f) is at least 2 wt. %.

Abstract: An acrylic additive polymer containing free carboxylic acid groups is added to a core-shell impact-property modifier containing free carboxylic acid groups to produce an improved physical-property modifier for polyamide resins.

Abstract: An aqueous dispersion of a graft-copolymer (A), dispersed in water or a mixed solvent (B) of water and a water-soluble organic solvent, the graft-copolymer (A) comprising a polyester (A-a) graft-polymerized with a radical copolymerizable monomer (A-b) comprising a radical copolymerizable monomer having a hydrophilic group, wherein said graft-copolymer (A) is dispersed as fine particles having an average particle size of not more than 500 nm and a half band width of a signal of a carbon of a carbonyl group of the polyester, as determined by .sup.13 C-NMR, is not less than 300 Hz. The aqueous polyester dispersion of the present invention is superior in re-dispersibility and when a paint prepared from the dispersion is coated on a metal or a plastic, the coated film shows superior appearance, processability and water resistance. Accordingly, the aqueous dispersion of the present invention serves well for use for paints, ink, coating agents, adhesives and various treating agents.

Abstract: A polyamide/aliphatic polyester block, copolymer (A) comprising a polyamide block and an aliphatic polyester block, (B) satisfying the expression T.sub.1 -T<100-C (in which T is the melting point (.degree.C.) of the above block copolymer, T.sub.1 is the melting point (.degree.C.) of a polyamide composed of the polyamide block and C is the content (wt. %) of the polyamide block), (C) exhibiting the extraction amount which satisfies the expression, when extracted in tetrahydrofuran, E<(100-C).times.0.4 (in which E is the extraction amount (wt. %) when the block copolymer is refluxed in tetrahydrofuran, and C is the content (wt. %) of the polyamide block) and (D) having an intrinsic viscosity, measured at 35.degree. C., in the range of from 0.5 to 5; a process for the production thereof; a fiber formed therefrom; and an intimate blend comprising a thermoplastic resin having no or poor compatibility with polyamide and the block copolymer.

Abstract: Thermoplastically processable elastomeric block copolyetheresteretheramides from recurring units of the formula ##STR1## in which ##STR2## represents a polyamide segment containing terminal carboxyl groups and having an average molar mass of 700 to 10,000,--O--E--O-- is a poly-(oxytetramethylene)-segment having an average molar mass of 600 to 3,500,--NH--F--NH-- represents a poly-(oxy-1,2-propylene)-segment containing terminal amino groups and having an average molar mass of 350 to 2,500,x and y are integers from 3 to 35 and indicate the number of the respective, randomly arranged, recurring units, the ratio x:y of components A and B varying between 5:1 and 1:5.The ether amides of the present invention can optionally be mixed with additives, fillers, modifiers, or other compatible polymers normally used in tile processing of polyamides and which are suitable for the production of molded articles, for example by injection molding, coinjection, extrusion, blow molding, etc.

Abstract: The cycloolefin resin compositions of the present invention comprise:[A] cycloolefin resin selected from (a-1) a cycloolefin random copolymer having recurring units derived from a cycloolefin of a specific structure, (a-2) a ring opening (co)polymer of the cycloolefin, (a-3) a hydrogenation product of the ring opening (co)polymer and (a-4) a graft-modified product of the random copolymer (a-1), the ring opening (co)polymer (a-2) and the hydrogenation product thereof (a-3);[B] at least one of (b-1) an unmodified elastomer, (b-2) a modified elastomer, (b-3) an unmodified crystalline polyolefin and (b-4) a modified crystalline polyolefin; and[C] a polyamide resin. Molded products formed from these cycloolefin resin compositions are excellent particularly in resistance to greases.

Abstract: Improved thermoplastic compositions adopted for easy conversion, e.g., by injection molding or extrusion techniques, into useful shaped articles having high flexibility, and good tear resistance and elasticity, include a polyetheramide, advantageously a polyetheresteramide, and a styrene/diene copolymer, e.g., a copolymer of styrene with butadiene or isoprene, notably a linear or branched chain styrene/butadiene/styrene or styrene/isoprene/styrene copolymer.

Abstract: A thermoplastic molding composition having a high neat deflection temperature but a relatively low melt extrusion temperature is formed by blending a polyetherimide with about 35 to about 80 weight percent of a copolyester of terephthalic and/or isophthalic acid and a glycol component comprising ethylene glycol and up to about 60 mol percent of 1,4-cyclohexanedimethanol. The blend also has a high flexural modulus and can be used to form plastic articles that can be molded at moderate temperatures but retain flexural strength at elevated temperatures. Certain compositions of the invention are clear, single phase solid solutions.

Abstract: Block copolymers of nylon 4.6 are made by the solid phase polymerization of an alloy of nylons, including nylon 4.6, blended above the melting point of the nylons and then polymerized in particulate form under anhydrous conditions below the melting point of the nylons in the alloy. The block copolymers are characterized by their novel combination of properties which may include good melt strength, high melt viscosity, ductility (elongation), toughness (impact strength), good tensile strength and tensile modulus, high heat deflection temperatures, low crystallinity and high melting points.

Abstract: A modified chlorinated polypropylene which has superior properties is obtained by the reaction of a chlorinated polypropylene having a molecular weight in the range of from 5,000 to 500,000 with a polyurethane having a molecular weight in the range of from 600 to 200,000. The modified chlorinated polypropylene exhibits excellent adhesion to various kinds of base film and a satisfactory performance with respect to such after-treatments as lamination, boiling and retort processes, and therefore is useful as a binder resin for printing ink or other coating compositions.

Abstract: Disclosed is a thermoplastic resin composition comprising(A) an aromatic polyamide comprisingdicarboxylic acid units comprising 50-100 mol % of units derived from terephthalic acid, and 0-50 mol % of units derived from an aromatic dicarboxylic acid other than terephthalic acid and/or an aliphatic-dicarboxylic acid having 4-20 carbon atoms, anddiamine units derived from an aliphatic diamine and/or an alicyclic diamine,said aromatic polyamide having an intrinsic viscosity of 0.5-3.0 dl/g as measured in conc. sulfuric acid at 30.degree. C. and a melting point of higher than 300.degree. C.,(B) a graft modified .alpha.-olefin polymer, and/or a graft modified aromatic vinyl hydrocarbon/conjugated diene copolymer or hydrogenated product thereof, and(C) an aliphatic polyamide,wherein said thermoplastic resin composition comprises 10-80 parts by weight of the graft modified .alpha.

Abstract: Polymer alloys based on (a) at least one thermoplastic, aromatic polyether-amide having a molecular weight of from 5000 to 40,000 and (b) at least one cycloolefin polymer are prepared. The proportions of the components are 99-50% by weight of (a) and 1-50% by weight of (b), the proportions adding up to 100% by weight, based on the total alloy. The polymer alloys can be used for the production of moldings.

Abstract: A process for stabilizing polymers is provided comprising:(1) contacting at least one hindered phenolic compound and an organic phosphite to form a stabilizing mixture,wherein said contacting is at a temperature sufficient to at least partially dissolve said hindered phenolic compound,wherein said stabilizing mixture is essentially free of organic solvent; and(2) contacting said stabilizing mixture and a polymeric composition comprising a monovinylarene/conjugated diene copolymer;wherein said organic phosphite and said at least one hindered phenolic compound are present in step (2) in an effective amount sufficient to stabilize said polymeric composition. In accordance with another aspect of this invention a method for preparing a stabilizing mixture essentially free of organic solvent is provided.

Abstract: A process for the preparation of moldable polymer blends having improved low temperature impact properties and reduced brittleness is disclosed. In one embodiment, a polyamide such as nylon-6 and an anhydride functionalized elastomer such as an EPDM rubber grafted with maleic anhydride are first melt-blended. The resulting composition is then blended with a thermoplastic copolymer of an .alpha.,.beta.-unsaturated carboxylic acid anhydride such as maleic anhydride and a monovinyl aromatic monomer such as styrene. The moldable polymer blends thus obtained are suitable for use as engineering resins.

Abstract: Crystalline imide/arylene ether block copolymers are prepared by reacting anhydride terminated poly(amic acids) with amine terminated poly(arylene ethers) in polar aprotic solvents and chemically or thermally cyclodehydrating the resulting intermediate poly(amic acids). The block copolymers of the invention have one glass transition temperature or two, depending on the particular structure and/or the compatibility of the block units. Most of these crystalline block copolymers form tough, solvent resistant films with high tensile properties. While all of the copolymers produced by the present invention are crystalline, testing reveals that copolymers with longer imide blocks or higher imide content have increased crystallinity.