Abstract: The present invention relates to a method for the preparation of a medical device element by means of extrusion or injection moulding and to medical devices comprising such extruded or injection moulded medical device elements. The medical device elements (e.g. tubes, wires, lines, stents, catheters, guides, endodontic instruments, needles, trocars for e.g. laparoscopic surgery, laparoscopic accessories, surgical instruments, guide wires) are characterized by a prefabricated shaped article or a thermoplastic substrate polymer having thereon a layer of a covalently cross-linked coating composition of a thermoplastic matrix polymer and a hydrophilic polymer. The method involves a coating composition comprising a thermoplastic matrix polymer, a hydrophilic polymer, and one or more photo-initiator(s), e.g. covalently linked to molecules of the thermoplastic matrix polymer and/or to molecules of the hydrophilic polymer.

Abstract: Provided is an insulated wire that can realize a high corona inception voltage and that can satisfy required properties such as heat resistance and a mechanical strength. A polyimide resin varnish containing, as a main component, a polyimide precursor resin obtained by allowing an aromatic diamine to react with an aromatic tetracarboxylic dianhydride, wherein the aromatic diamine includes a first aromatic diamine having an aromatic ether bond and three or more benzene rings, and a second aromatic diamine represented by formula (2) below, and an imide group concentration after imidization of the polyimide precursor resin is 25% or more and 35% or less. (In the formula, R represents CH2 or O.

Abstract: Disclosed are novel cross-linkable end-cappers for oligo-and polyimides. End-capped oligo-and polyimides comprising such an end-capper may be cured at a lower temperature compared to oligo-and polyimides end-capped with PEPA.

Abstract: The invention relates to a non-fibrous polymer solution essentially consisting of 1 to 8 wt. % para-aramid, at least 50 mole % of the aromatic moieties thereof being unsubstituted, in a mixture of a) a polar amide solvent selected from N-methyl-2-pyrrolidone, N,N?-dimethylformamide, N,N?-dimethylacetamide, tetramethylurea, and mixtures thereof; b) between 0.7 mole of an alkali or earth alkali chloride per mole amide groups of the para-aramid and 7.5 wt. % of the alkali or earth alkali chloride, and c) water; and wherein at least 50 wt. % of the formed hydrochloric acid has been neutralized to obtain a solution having a dynamic viscosity which is at least a factor three smaller than the dynamic viscosity of the polymer solution without neutralization. The invention further pertains to a process making the same and para-aramid pulp-like fiber, paper and film made from said polymer solution.

Abstract: The present invention relates to polypiperidine compounds capable of conferring to polymeric materials, particularly polyolefins, a high stability against photodegradation and oxidative action of air, which belong to the HALS category and have the following general formula (I) in which x can be zero or 1; y is between 1 and 10; m and n, which may be different or equal to each other, range from 2 to 8; A represents a NPiR1 group or a NR2R3 group; and Pi represents the group of formula (II) wherein R1 is selected from the group consisting of H, C1-C4 straight-chain and branched-chain alkyl groups; R2 and R3 can be the same or different and are selected in the group consisting of H, C1-C8 straight-chain and branched-chain alkyl groups, cyclic alkyl groups having from 5 to 12 carbon atoms, or form together with the nitrogen atom a heterocyclic ring having from 5 to 7 members, comprising other heteroatoms such as O, R4 is selected from the group consisting of H, C1-C4 straight-chain and branched-

Abstract: This invention relates to hydroxy alkyl isocyanurates, coating compositions comprising hydroxy alkyl isocyanurates and methods for producing hydroxy alkyl isocyanurates. Dried and cured coating compositions containing the hydroxy alkyl isocyanurates provide excellent durability, gloss and distinctness of image.

Abstract: Compositions and methods for producing compositions comprising a monoamine-endcapped polyimide component. Based on a gas chromatography mass spectroscopy analysis of a surface rinse of the composition performed at room temperature, the composition can have at least one surface with less than or equal to 5 ppb releasable phosphorous residuals, and less than or equal to 5 ppb releasable volatile organic compound residuals. The composition can also comprise less than or equal to 10 ppb combined releasable residuals. Because of the very low levels of residual contamination, the compositions can be used to produce a variety of articles, including a disk drive.

Abstract: The invention relates to amino(meth)acrylates obtained from the reaction of amines with a mixture of urethane(meth)acrylates and (meth)acrylated diluent sand their use for making coatings, adhesives, varnishes and inks. The amino(meth)acrylates of the invention are particularly suited for use in sealer compositions for parquet and laminate floors.

Abstract: In one embodiment, a plastic composition can comprise: a plastic, a white pigment, and a non-white colorant. The composition can have a whiteness index of greater than or equal to about 50, and a composition yellowness index of less than 10, as measured on a 3 mm thick color chip under D65 illuminant and 2 degree observer. Also disclosed are articles made from the plastic composition.

Abstract: A poly(amide-imide) block copolymer that includes: a first segment including a repeating unit represented by Chemical Formula 1A, a repeating unit represented by Chemical Formula 1B, a repeating unit represented by Chemical Formula 1C, or a combination thereof; and a second segment including a repeating unit represented by Chemical Formula 2:

Abstract: Polyimide resin compositions that contain an end-capped rigid aromatic polyimide, graphite and, optionally, a filler selected from sepiolite, attapulgite, kaolinite, or a mixture thereof, are found to exhibit low wear at high temperatures. Such compositions are especially useful in molded articles that are exposed to wear conditions at high temperatures such as aircraft engine parts.

Abstract: A white polyimide film comprises a polyimide base polymer and a coloration filler homogeneously distributed in the white polyimide film by reacting a diamine component with a dianhydride component and a coloration filter. The diamine component can include 2,2?-bis(trifluoromethyl)benzidine, and the dianhydride component can include 3,3?,4,4?-biphenyltetracarboxylic dianhydride and 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride. The coloration filler can include TiO2, Al2O3, CaCO3, CaSO4, SiO2, BN, AlN and clay. The white polyimide film has a coefficient of thermal expansion (CTE) less than about 60 ppm/° C. in a temperature range between about 100° C. and about 200° C. , an elongation rate between about 5% and about 60%, and a b*-value between about 0 and about 15. In some embodiments, a method of manufacturing the white polyimide film is also described.

Abstract: Copoly(imide oxetane) materials are disclosed that can exhibit a low surface energy while possessing the mechanical, thermal, chemical and optical properties associated with polyimides. The copoly(imide oxetane)s are prepared using a minor amount of fluorinated oxetane-derived oligomer with sufficient fluorine-containing segments of the copoly(imide oxetane)s that migrate to the exterior surface of the polymeric material to yield low surface energies. Thus the coatings and articles of manufacture made with the copoly(imide oxetane)s of this invention are characterized as having an anisotropic fluorine composition. The low surface energies can be achieved with very low content of fluorinated oxetane-derived oligomer. The copolymers of this invention can enhance the viability of polyimides for many applications and may be acceptable where homopolyimide materials have been unacceptable.

Abstract: Polyimide resin compositions that contain an end-capped rigid aromatic polyimide, graphite and carbon filaments are found to exhibit low wear at high temperatures. Such compositions are especially useful in molded articles that are exposed to wear conditions at high temperatures such as aircraft engine parts.

Abstract: Reactive system comprising at least one component (I) composed of particles in very finely divided form present in a liquid phase of at least one further component (II) with which component (I) is capable of reacting following activation through energy supply, wherein component (I) is not soluble in component (II), process for preparation and use.

Abstract: An isocyanurate compound for forming an organic anti-reflective coating layer, which has superior stability and etch rate at a high temperature, and which has a high refractive index, is represented by following Formula 1. In Formula 1, R is independently a hydrogen atom or a methyl group, R1 is independently a chain type or ring type saturated or unsaturated hydrocarbyl group of 1 to 15 carbon atoms containing 0 to 6 of hetero atoms, and R2 independently a chain type or ring type saturated or unsaturated hydrocarbyl group of 1 to 15 carbon atoms containing 0 to 15 of hetero atoms, wherein, R1 can have at least two bonding parts, and in the case that R1 has at least two bonding parts, the rest parts except R1 of the compounds represented by Formula 1 can connect to the R1 to form a polymer structure.

Abstract: A polyimide polymer solution, a polyimide polymer, a transparent film, a display device and a solar cell are provided. The polyimide polymer has at least one of a repeating unit of formula (D) and a repeating unit of formula (J) and at least one of a repeating unit of formula (Q) and a repeating unit of formula (T). One of B and B? is cyclo-aliphatic compound, and the other is aromatic compound, a molar mass ratio of the cyclo-aliphatic compound to the aromatic compound is 1˜4, A and A? are identical or different aromatic diamines, and at least one of A and A? is aromatic diamine with ether groups, and A could be the same as or different from A?.

Abstract: A method of making coatings, marking products and/or sealing products from a starting material including aggregate, includes the step of adding to a starting material a binder including at least one resin based on polymerized hydroxyacid derivatives as a non bituminous binder, as a non bituminous binder, the resin(s) being selected from: a) organic resins derived from an oil or a fat having a natural origin including monoglycerides and/or diglycerides, esterified with a poly(hydroxy acid), b) organic resins corresponding to lactic polyacid and polyol esters and/or mono- or polyhydroxylated polyacid esters, c) organic resins based on lactic polyacid or lactic polyacid derivatives such as corresponding esters thereof.

Abstract: A liquid crystal alignment agent includes a polymer and an organic solvent for dissolving the polymer. The polymer is obtained by subjecting a diamine composition and a tetracarboxylic dianhydride compound to a polymerization reaction. The diamine composition includes a first diamine compound, a second diamine compound, and a third diamine compound as defined in the specification. A liquid crystal alignment film formed from the liquid crystal alignment agent and a liquid crystal display element including the liquid crystal alignment film are also disclosed.

Abstract: Waterborne coating compositions are disclosed that include a latex emulsion polymer, and, as a coalescent, a diester of hydroxypivalyl hydroxypivalate. The coating compositions of the invention have a reduced VOC content and provide satisfactory coalescing activity.

Abstract: The present invention discloses a method of producing a modified polyimide comprising a polycarbonate, which modified polyimide has excellent electric properties and adhesion as well as excellent heat resistance, flexibility, bending property, low warping, chemical resistance and storage stability; and the modified polyimide. Also disclosed are a composition comprising the modified polyimide and used thereof.

Abstract: The present invention provides a color conversion film which can maintain sufficient conversion light intensity without increasing the thickness thereof, and a multicolor light-emitting organic EL device which uses such a film. The color conversion film of the invention includes a polymeric dye material composed of a first dye unit and a second dye unit. The first dye unit absorbs light incident on the color conversion film and transfers the energy of the absorbed incident light to the second dye unit. The second dye unit receives the energy from the first dye unit and emits light.

Abstract: To provide a thermosetting polyimide resin composition that can provide a cured product which generates a small amount of decomposition gas even when exposed to, for example, a high-temperature environment of about 250° C., and which exhibits high heat resistance, high durability, favorable flexibility, and favorable adhesive property; a cured product produced from the thermosetting polyimide resin composition; and an adhesive produced from the thermosetting polyimide resin composition. The thermosetting polyimide resin composition containing (a) a polyimide produced through reaction between a tetracarboxylic acid component containing a tetracarboxylic dianhydride and/or a tetracarboxylic acid, and a diamine; and (b) a maleimide composition containing at least one polymaleimide compound represented by any of formulas (4-1) to (4-3).

Abstract: In a method for preparing a polyimide resin by reacting diamine and dianhydride, the polyimide resin is polymerized under the presence of a solvent having a boiling point ranging from 130° C. to 180° C. so as to be curable at a low temperature ranging from 150° C. to 250° C. Because the polyimide is curable even at a low temperature, when the polyimide resin is used as an electronic material, damage to equipment due to an otherwise high temperature process can be minimized, and in addition, the polyimide resin can be extensively used as an electronic material such as for a plastic substrate, or the like.

Abstract: Surface-modified polymer films for coating are provided, wherein the surface is modified by covalent binding of nano- or micro-particles comprising a photoreactive species. The surface of the polymer film, e.g. a parylene film, may be modified by covalent binding of nano- or micro-particles of a polymer, e.g. a conductive bifunctional polymer further comprising a chemically reactive functional group, or of a hybrid organic-inorganic oxide, e.g., silica, network comprising a photoreactive species. Further provided are: (i) polymerizable monomers, the conductive bifunctional polymers obtained therefrom; (ii) a hybrid photoreactive organic-inorganic oxide network; and (iii) micro- or nano-particles made from (i) or (ii).

Abstract: The present invention relates to thioic acids according to formula (II) suitable as building block for polythioesters; Wherein X is O, N or S and whereby R1 is chosen from (—CH2—)2, —CH2—O—CH2— or (—CH2—)3, R2 is preferably chosen from a biodegradable oligomer or polymer chosen from poly(lactide) (PLLA), polyglycolide (PGA), co-oligomers or copolymers of PLA and PGA (PLGA), poly(anhydrides), poly(trimethylenecarbonates), poly(orthoesters), poly(dioxanones), poly(?-caprolactones) (PCL) or polyesteramides and n>1.

Abstract: A method for using citraconic anhydride and itaconic anhydride as addition cure end caps in reactions for forming polyamic acid oligomers and polyimide oligomers, is provided. Prepregs and high temperature adhesives made from the resulting oligomers, as well as, high temperature, low void volume composites made from the prepregs, are also provided.

Abstract: This invention relates generally to composites comprising a plurality of nanostructures, and methods of making the same. In some embodiments, the composites further comprise a polymer. In some embodiments, the composites may have desirable properties such as, for example, biodegradability, biocompatibility, and/or high tensile strength. In one embodiment, the plurality of nanostructures comprises carbon nanotubes, and the polymer comprises a poly(beta-amino ester). Various methods are provided for preparing the composites. For example, the polymer and the plurality of nanostructures may, in some embodiments, be combined in a layer-by-layer process to form the composite. High throughput methods for preparing composites having different compositions also are provided for screening composites for desirable properties.

Abstract: A process for purification of a hydroxycarboxylic acid by distillation, comprising: distilling a hydroxycarboxylic acid solution containing a high-boiling point hydroxy compound comprising at least one species selected from the group consisting of alcohols and phenols having a higher boiling point than the hydroxycarboxylic acid. As a result, a hydroxycarboxylic acid suitable as a starting material for production of a polyhydroxycarboxylic acid can be obtained. The purified hydroxycarboxylic acid is further polycondensed to provide a hydroxycarboxylic acid oligomer, which is de-polymerized to provide a cyclic ester comprising a dimer of the hydroxycarboxylic acid, and the cyclic ester is converted into a polyhydroxycarboxylic acid by ring-opening polymerization thereof.

Abstract: Crosslinked polycondensation products of: (a) polyols selected from the group consisting of: (1) polyols with three or more hydroxyl groups, (2) acetal forms of (1), and (3) mixtures thereof, and (b) polyacids selected from the group consisting of: (1) polyacids with two or more carboxylic groups, (2) anhydrides of (1), (3) esters of (1), and (4) mixtures thereof are disclosed. The resulting polyesters have a molar ratio of polyol to polyacid from about 1:3 to about 3:1 and are highly-crosslinked. Preferred monomers are sustainable monomers such as glycerol, citric acid, fumaric acid, and sebacic acid. Two-step heating processes for preparing the high molecular weight polyesters are also provided.

Abstract: A novel polyimide which retains the characteristics of polyimides, that is, excellent heat resistance, electrical insulation and chemical resistance, of which dielectric constant is lower than those of the known polyimides, as well as a composition containing the same and a process for producing the same, is disclosed. The polyimide of the present invention is a cross-linked polyimide having a dielectric constant of not more than 2.7, which was produced by polycondensing (a) tetramine(s), (a) tetracarboxylic dianhydride(s) and (an) aromatic diamine(s) in the presence of a catalyst.

Abstract: This invention provides a coating composition for use on a food-contact surface of a container (e.g., a food or beverage can) that includes a polymer having one or more segments of Formula I: —O—Ar—Rn—C(O)—O—R1—O—C(O)—Rn—Ar—O— wherein each Ar is independently a divalent aryl group (i.e., an arylene group) or heteroarylene group; R1 is a divalent organic group; each R is independently a divalent organic group; and n is 0 or 1. Containers comprising the polymer and methods of making such containers are also provided.

Abstract: A film is disclosed, containing 40-100 weight percent polyimide. The polyimide is derived from a dianhydride component and a diamine component. The dianhydride component is at least 3,3?,4,4?-biphenyl tetracarboxylic dianhydride (BPDA), and optionally is also pyromellitic dianhydride (PMDA) in a mole ratio of 50-100:50-0 (BPDA:PMDA). The diamine component comprises 1,5-naphthalenediamine (1,5-ND) and 1,4-diaminobenzene (PPD) and/or meta phenylene diamine (MPD) in a mole ratio of 15-95:85-5 (1,5-ND:PPD+MPD). The films have exceptional high temperature storage modulus (elastic modulus) and exceptionally low high temperature creep (eplast).

Abstract: Disclosed herein are compositions and articles that are useful in environments exposed to heat, wear, and oxidizing agents, which are improved by means of specific kinds of carbon filaments. The compositions and articles comprise high-temperature polymer, high-temperature filler, and a mixture of carbon filament, wherein said mixture of carbon filament comprises multiwall axial carbon filament.

Abstract: The present invention provides a composition of the modified maleic anhydride and the epoxy resins, including (A) one or more of the epoxy resin mixtures, (B) a modified maleic anhydride copolymer, (C) additives and (D) inorganic filler materials, wherein component (A) the epoxy resin mixture accounts for 35%˜56% by weight of the composition solids, component (B) the modified maleic anhydride copolymer accounts for 44%˜65% by weight of the composition solids, based on 100% by weight of total components (A), (B) and (C).

Abstract: To provide a curable composition, from which a cured film having a low dielectric constant can be obtained and which is excellent in providing embedding planarity at the time of film formation. A curable composition comprising a fluorinated polyarylene prepolymer (A) having a crosslinkable functional group, and a compound (B) having a molecular weight of from 140 to 5,000, having a crosslinkable functional group and having no fluorine atoms.

Abstract: The present invention relates to polyimide or precursor thereof represented by Chemical Formula 1 or 2 and a photosensitive resin composition including the same. The polyimide or precursor thereof are fabricated using diamine comprising polyalkyleneoxide. The photosensitive resin composition of the present invention has excellent light transmissivity, an excellent resolution, and excellent photo sensitivity and image forming performance. Further, the photosensitive resin composition has high adhesiveness with substrates, such as a silicon film, a silicon oxide film, and a metal film. In particular, an excellent film without failure, such as crack, can be formed.

Abstract: The present disclosure is directed to a base film having a thickness from 8 to 152 microns, a 60 degree gloss value from 2 to 35, an optical density greater than or equal to 2 and a dielectric strength greater than 1400 V/mil. The base film comprises a chemically converted (partially or wholly aromatic) polyimide in an amount from 63 to 96 weight percent of the base film. The base film further comprises a pigment and a matting agent. The matting agent is present in an amount from 1.6 to 10 weight percent of the base film, has a median particle size from 1.3 to 10 microns, and has a density from 2 to 4.5 g/cc. The pigment is present in an amount from 2 to 35 weight percent of the base film. The present disclosure is also directed to coverlay films comprising the base film in combination with an adhesive layer.

Abstract: The present disclosure relates to benefit agent delivery particles containing at least one benefit agent and at least one cellulosic polymer. The disclosure further relates to fabric care compositions containing benefit agent delivery particles and processes for making and using such compositions. The disclosure further relates to methods of imparting a benefit delivery capability to a fabric care composition.

Abstract: An aqueous dispersion comprising a reaction product of trimellitic anhydride and a polyol, wherein the molar ratio of trimellitic anhydride to polyol in the reaction product ranges from 1:2 to 1:4, and wherein the reaction product is further reacted with an anhydride to form another reaction product. A method of making a resin comprising the reaction product described above is also disclosed.

Abstract: The present invention relates to a resin emulsion which has a good emulsification performance even when produced by using a crosslinked polyester resin having a good fusing ability and a good durability, and also is capable of producing a toner having an excellent heat-resistant storage property therefrom; and a process for producing the resin emulsion. The process for producing a resin emulsion according to the present invention, includes the steps of: (a) mixing a resin containing a polyester having a constitutional unit derived from at least one component selected from the group consisting of a trivalent or higher-valent alcohol component and a trivalent or higher-valent carboxylic acid component, an anionic surfactant, and a nonionic surfactant with each other at a temperature which is not lower than a temperature lower by 10° C. than a softening point of the resin, the nonionic surfactant being used in an amount of more than 1.

Abstract: In one embodiment, a method for restoring adhesive strength of an adhesive that has lost at least some of its adhesive strength includes applying a restoration agent to the adhesive. In one embodiment, a selectively-releasable adhesive includes a copolymer formed from a multifunctional alcohol and a multifunctional carboxylic acid, wherein the copolymer has been cured the equivalent of less than approximately 9 hours at approximately 120° C. and 100 milliTorr.

Abstract: This invention relates to hydroxy alkyl isocyanurates, coating compositions comprising hydroxy alkyl isocyanurates and methods for producing hydroxy alkyl isocyanurates. Dried and cured coating compositions containing the hydroxy alkyl isocyanurates provide excellent durability, gloss and distinctness of image.

Abstract: The invention describes a process for preparing pulverulent polyimide-polyimide block copolymers. The result polyimide-polyimide block copolymers and compounds produced using them can be compressed into moldings by the direct forming method or by the hot compression molding method. Polymeric moldings can be produced therefrom by customary mechanical and thermal machining and forming methods.

Abstract: The present invention provides a carbon black-dispersed polyamic acid solution composition having a high solids content and a high carbon black content. The invention further provides an intermediate transfer belt using the polyamic acid solution composition. The carbon black-dispersed polyamic acid solution composition is obtained by uniformly dispersing carbon black in a polyamic acid solution obtained by reacting biphenyltetracarboxylic dianhydride and an aromatic diamine in an organic polar solvent. The biphenyltetracarboxylic dianhydride includes 2,3,3?,4?-biphenyltetracarboxylic dianhydride and 3,3?,4,4?-biphenyltetracarboxylic dianhydride. The aromatic diamine includes 4,4?-diaminodiphenyl ether and p-phenylenediamine. The polyamic acid solution has a solids content of 25 weight % or more.

Abstract: The invention relates to a non-fibrous polymer solution essentially consisting of 1 to 8 wt. % para-aramid, at least 50 mole % of the aromatic moieties thereof being unsubstituted, in a mixture of a) a polar amide solvent selected from N-methyl-2-pyrrolidone, N,N?-dimethyl-formamide, N,N?-dimethylacetamide, tetramethylurea, and mixtures thereof; b) between 0.7 mole of an alkali or alkaline earth metal chloride per mole amide groups of the para-aramid and 7.5 wt. % of the alkali or alkaline earth metal chloride, and c) water; and wherein at least 50 wt. % of the formed hydrochloric acid has been neutralized to obtain a solution having a dynamic viscosity which is at least a factor three smaller than the dynamic viscosity of the polymer solution without neutralization. The invention further pertains to a process making the same and para-aramid pulp-like fiber, paper and film made from said polymer solution.

Abstract: It is provided for a resin composition including (A) at least one polyamic acid having the structure represented by the following formula (1): wherein R1 is independently an alkyl group having 1 to 3 carbon atoms or a cyano group; a is independently an integer of 0 to 4; R is a tetravalent organic group; n is an integer of 1 to 4; and m is an integer of 1 to 100,000, and (E) an organic solvent.

Abstract: An electrical component that includes a substrate and a polymeric layer oriented in working relation with the substrate, the polymeric layer including a low molecular mass polyimide.

Abstract: Disclosed are formaldehyde-free, thermally-curable, alkaline, aqueous binder compositions. The disclosed binder compositions may be cured to substantially water-insoluble thermoset polyester resins, including formaldehyde-free, substantially water-insoluble thermoset polyester resins. Uses of the disclosed binder compositions as binders for non-woven fibers and fiber materials are also disclosed.

Abstract: Disclosed herein is a composite part for an airplane engine comprising polymer selected from polyimide, polyamide-imide, polyether imides, polybenzimidazole, or blends thereof, and carbonaceous filler, which in combination provides thermal stability and wear resistance. Optionally, the composite may comprise particulate.