Abstract: The present invention relates to a pH-sensitive PIC (polyion complex) type polymeric micelle formed by electrostatic interaction between a dendritic block copolymer and another polymer of opposite charge. The presence of a dendritic block copolymer confers high stability to the micelles in physiological conditions, while in the acid medium of tumor tissues (pH 6.5) or cell compartments, such as the endosome/lysosome (pH 5.0-5.5), the micelles tend to become destabilized, being able to selectively release drugs or macromolecules encapsulated therein. The micelles are characterized by high stability against ionic strength, dilution and temperature. They can further be lyophilized and conserved in solid state.

Abstract: A nanodevice composition including N-acetyl cysteine linked to a dendrimer, such as a PAMAM dendrimer or a multiarm PEG polymer, is provided. Also provided is a nanodevice for targeted delivery of a compound to a location in need of treatment. The nanodevice includes a PAMAM dendrimer or multiarm PEG polymer, linked to the compound via a disulfide bond. There is provided a nanodevice composition for localizing and delivering therapeutically active agents, the nanodevice includes a PAMAM dendrimer or multiarm PEG polymer and at least one therapeutically active agent attached to the PAMAM dendrimer or multiarm PEG polymer.

Abstract: The present invention provides a thermoplastic polymer composition capable of exhibiting excellent impact resistance, durability and destaticizing property. The present invention relates to a thermoplastic polymer composition comprising (A) 50 to 95% by mass of an aliphatic polyester-based resin and (B) 5 to 50% by mass of a block copolymer comprising (B1) a hard segment block comprising at least one polymer selected from the group consisting of a polyamide, a polyester, a polyolefin and a polyurethane, and (B2) a soft segment block having an ether bond, with the proviso that a total amount of the components (A) and (B) is 100% by mass.

Abstract: A polyimide film made of a multicomponent polyimide comprising two or more different polyimide components including (A) a polyimide component A being raw materials of a polyimide A and/or a polyimidation product of the raw materials and (B) a polyimide component B being raw materials of a polyimide B and/or a polyimidation product of the raw materials. The polyimide components A and B are different, for example, such that the absolute difference between solubility parameter SPA of the polyimide A and solubility parameter SPB of the polyimide B, |SPB-SPA|, is 0.5 MPa1/2 or more. The polyimide film has markedly modified surface properties as compared with a polyimide film in which all the same raw materials as used in the film of the invention are randomly bonded to one another.

Abstract: Curative fibre components comprise one or more fibres for filaments of curative suitable to cure curable resins such as thermoset resin. In curative fibre components comprising a plurality of fibres of curative, the fibres can be commingled, such as twisting, to form a thread or yarn. Curative fibre components can be used to form a material in the form of a sheet, fabric, layer, textile or mat of woven or non-woven curative fibres. Curative fibre components can be used to produce composite materials such as fibre reinforced resinous composite materials. The curative fibre components can be commingled, including interwoven, stitched and layered with other fibres or fibrous materials, such as fibrous reinforcement, fibrous curable resin, fibrous thermoplastic, other non-reinforcing fibres to form composite materials, prepregs, preforms and articles.

Abstract: There has been a need for an overcoat film composition that functions as an overcoat film in terms of high transparency and flatness, and that also functions as an aligning film in terms of liquid crystal molecular alignment. There has also been a need to lower the cost of manufacturing a liquid crystal display element. There is provided an overcoat film composition comprising one or more compounds selected from the group of polyester-polyamic acids (A1) obtained using at least a polyhydric hydroxy compound (a1), a diamine (a2), and a compound having two or more acid anhydride groups (a3), and polyester-polyimides (A2) that are imidization products thereof, and a polyamic acid (B).

Abstract: The invention relates to a polyamide molding material or copolyamide molding material and the use of such a polyamide molding material or copolyamide molding material for producing steam-sterilizable transparent moldings and extrudates. This polyamide molding material is characterized in that it comprises at least one copolyamide formed from 35-42 mol % of bis(4-amino-3-methylcyclohexyl)methane (MACM), 35-42 mol % of isophthalic acid (IPS) and 16-30 mol % of laurolactam (LC12). MACM may be replaced up to 50% by bis(4-aminocyclohexyl)-methane (PACM) and IPA up to 50% by terephthalic acid (TPA). The polyamide molding material may also be a blend of copolyamides or a blend of copolyamides with polyamide 12. The relative viscosity (RV) of the polyamide molding material or copolyamide molding material is in any case adjusted to a value which is greater than 1.45.

Abstract: A process for producing a synthetic fiber composition with reclaimed post consumer carpet yarn, wherein face yarn is shaved from post consumer carpet using a shaving device to provide shaved face yarn, the shaved face yarn is reduced in size, contaminants are removed using mechanical screeners, the shaved face yarn is melt filtered, and spun into fiber.

Abstract: A polyamide molding composition which can be used for production of a printable or printed item contains a) at most 90 parts by weight of a polyamide obtained from a lactam or from an amino carboxylic acid having at least 10 carbon atoms; and b) from 10 to 100 parts by weight of PA1010, wherein a total of components a) and b) is 100 parts by weight.

Abstract: A powder mixture is described, which is suitable for a layer-wise manufacturing of a three-dimensional object by solidifying a building material in powder form. The powder mixture consists of a mixture of a first polyamide 12 powder and a second polyamide 12 powder, wherein the first polyamide 12 powder is characterized by an increase of its viscosity number determined in accordance with ISO 307 that is less than 10%, when the powder is exposed for 20 hours to a temperature that lies 10° C. below its melting temperature under nitrogen atmosphere, and the second polyamide 12 powder is characterized by an increase of its viscosity number, determined in accordance with ISO 307, by 15% or more, when the powder is exposed for 20 hours to a temperature that lies 10° C. below its melting temperature under nitrogen atmosphere.

Abstract: The invention relates to semi crystalline, melt processible, partially aromatic copolyamides, producible by condensation of at least the following monomers or the precondensates thereof: a) terephthalic acid b) at least one dimerised fatty acid with up to 44 carbon atoms and c) at least one aliphatic diamine of the formula H2N—(CH2)x—NH2, wherein x means a whole number from 4-18.

Abstract: Fiber reinforced composites fabricated using a low-temperature, solution-based growth of nanowires such as ZnO nanowires on the surface of the reinforcing fibers such as carbon fibers and functionalized aramid fibers. The composites with nanowire interphase may have an enhanced fiber/matrix interface strength and a comparable in-plane strength, as compared to similar composites without such nanowire interphase.

Abstract: A composition comprising (a) a resin composition comprising a block copolymer of the formula hydrocarbon-polyether-polyamide-polyether-hydrocarbon; and (b) a polar liquid. The block copolymer may be prepared by a process comprising reacting together reactants comprising dimer acid, diamine, and a polyether having termination at one end selected from amine, hydroxyl and carboxyl, and termination at another end selected from hydrocarbons. The polar liquid may be one or more of an aromatic liquid, a polar aprotic liquid, a ketone-containing liquid, an ester-containing liquid, an ether-containing liquid, an amide-containing liquid and a sulfoxide-containing liquid. The composition may be a gel at room temperature.

Abstract: The invention pertains to the use of certain fluorinated thermoplastic polymer additives for reducing the coefficient of friction of non-fluorinated polymers and to masterbatches of said additives with non-fluorinated polymers.

Abstract: The invention relates to surface modifying macromolecules (SMMs) having high degradation temperatures and their use in the manufacture of articles made from base polymers which require high temperature processing. The surface modifier is admixed with the base polymer to impart alcohol and water repellency properties.

Abstract: A method polymerizes a monomer to form a polyamide having a reagent incorporated therein. In the method, a masterbatch is formed that includes the reagent. The masterbatch and the monomer are introduced into a reactor, and the monomer is polymerized in the presence of the reagent to form the polyamide having the reagent incorporated therein. The monomer may be a caprolactam monomer that may be polymerized in a VK tube reactor to form polyamide 6 having at least one free acid site. The reagent may be present in an amount of from 1 to 10 parts by weight per 100 parts by weight of the masterbatch. Additionally, the masterbatch and caprolactam may be introduced into the top of the VK tube reactor.

Abstract: A polyamide molding composition is described, comprising at least one transparent polyesteramide in a proportion by weight of from 70 to 99.99% by weight; at least one further polymer in a proportion by weight of from 0 to 30% by weight; at least one photochromic dye in a proportion by weight of from 0.01 to 2% by weight; and also optionally further dyes and/or additives. The invention further encompasses articles manufactured therefrom, e.g. foils, for the coating of photochromic ophthalmic lenses, or the like.

Abstract: A polymer composition, a cross-linked polymer formed therefrom, an electrolyte membrane and electrode for a fuel cell including the same, and a fuel cell employing the electrode and the electrolyte membrane. The cross-linked polymer includes an oxazine-based monomer capable of retaining phosphoric acid and has excellent mechanical strength. When the cross-linked polymer is used, an electrode and electrolyte membrane for a fuel cell with enhanced capability of retaining phosphoric acid at a wide range of temperature may be manufactured, leading to long-term durability, and enhanced proton conductivity.

Abstract: The invention relates to a polyamide comprising at least two units having the following general formula: 4.Y in which: 4 denotes butanediamine, and Y represents a dicarboxylic acid chosen from a linear or branched aliphatic dicarboxylic acid, a cycloaliphatic diacid and an aromatic diacid, the dicarboxylic acid containing from 7 to 11 carbon atoms, the butanediamine contains carbon of renewable origin, except for the fact that when the polyamide is a copolyamide, it cannot contain 100% by mass of organic carbon derived from renewable raw materials relative to the total mass of polyamide carbon. The invention also relates to a composition comprising this polyamide and the use of this polyamide and of such a composition.

Abstract: A thermoplastic resin composition comprising 100 parts by mass of a polyamide resin composition (A) and 0.1 to 10 parts by mass of a carbodiimide compound (B) having two or more carbodiimide groups. The polyamide resin composition (A) contains a polyamide resin (a-1) and nylon 11 and/or nylon 12 (a-2) in an amount of 5 to 95% by mass of the component (a-1) and 95 to 5% by mass of the component (a-2) each based on a total amount of the components (a-1) and (a-2). The polyamide resin (a-1) is constituted by diamine units 70 mol % or more of which are derived from m-xylylenediamine and dicarboxylic acid units 70 mol % or more of which are derived from a C4 to C20 ?,?-linear aliphatic dicarboxylic acid. The thermoplastic resin composition is excellent in barrier property, strength and impact resistance, in particular, barrier property to alcohol-containing fuels, and suitably used as various shaped articles such as fuel containers, tubes and parts.

Abstract: The present invention relates to a copolyamide comprising at least two units and corresponding to the following general formula: A/(diamine).(Cw diacid), in which: the diamine is a cycloaliphatic diamine, w represents the number of carbon atoms of the diacid, A is chosen from a unit obtained from an amino acid or from a lactam and a unit corresponding to the formula (Cx diamine).(Cy diacid), with x representing the number of carbon atoms of the diamine and y representing the number of carbon atoms of the diacid, and in which at least one of the monomers chosen from A and the Cw diacid is obtained, in all or part, from renewable starting materials according to Standard ASTM D6866. The invention also relates to a composition comprising this copolyamide and to the use of this copolyamide and of such a composition.

Abstract: A polyamide moulding composition is condensed up in the melt by means of a masterbatch containing a compound having at least two carbonate units and also a polyetheramide in which at least 50% of the end groups are present as amino end groups, whereupon the melt mixture is discharged and solidified to give a moulding composition or a moulding. The product obtained has an increased amino end group content and consequently an improved hydrolysis resistance.

Abstract: The invention relates to a polyamide comprising at least two units having the following general formula: X.Y where: X is an alkylaromatic diamine and Y is an aliphatic carboxylic diacid selected from dodecanedioic (C12) acid, tetradecanedioic (C14) acid, hexadecanedioic (C16) acid, characterized in that the carboxylic diacid comprises organic carbon from a renewable source determined according to standard ASTM D6866 The invention also relates to a composition comprising this polyamide and the use of said polyamide and of such a composition.

Abstract: The present invention provides a target gene-specific histone modification regulator, which comprises a conjugate between a histone modification regulator and a polyamide capable of recognizing a regulatory region in a target gene. This enables the provision of a target gene-specific histone modification regulator.

Abstract: Disclosed are polymer compositions having high transparency and low haze comprising immiscible blends of one or more thermoplastic polymers selected from polyesters, polycarbonates, and polyarylates, and a copolyamide or a transamidized, homogeneous blend of a least two polyamides. The components of the immiscible blend which have refractive indices which differ by about 0.006 to about ?0.0006. The small difference in the refractive indices enable the incorporation of regrind into the polymer composition to produce transparent shaped articles. The blends of the present invention are useful in producing shaped articles such as, for example, sheeting, films, tubes, bottles, preforms and profiles. These articles may have one or more layers and can exhibit improved excellent barrier properties and good melt processability while retaining excellent mechanical properties. Metal catalysts can be incorporated into the compositions to produce oxygen-scavenging compositions.

Abstract: A binding fiber having, as at least one first thermoplastic component, a copolyamide which has a relative viscosity of at least 1.50 (measured at 0.5% in m-cresol at 25° C.), a MVR of maximum 20 cm3/10 min at 190° C. and 2.16 kg load, a hydrophobicity of less than 7.2, a melting temperature lower than 105° C. in the water saturated condition and a higher melting temperature in the dry condition. The binding fiber can, on the one hand, be activated with hot steam at approximately ambient pressure during the manufacture of flat materials containing natural fibers, such as paper, cardboard, wood fiber boards, or fiber mats. The finished flat material can, on the other hand, be subjected to higher temperatures, and the copolyamide develops good bonding with respect to the cellulose fibers normally used in the indicated flat materials.

Abstract: Disclosed are oxygen-scavenging polymer compositions having high transparency and low haze comprising immiscible blends of one or more thermoplastic polymers selected from polyesters, polycarbonates, and polyarylates, a copolyamide or a transamidized, homogeneous blend of a least two polyamides, and a metal catalyst. The components of the immiscible blend which have refractive indices which differ by about 0.006 to about ?0.0006. The small difference in the refractive indices enable the incorporation of regrind into the polymer composition to produce transparent shaped articles. The blends of the present invention are useful in producing shaped articles such as, for example, sheeting, films, tubes, bottles, preforms and profiles. These articles may have one or more layers and can exhibit improved excellent barrier properties and good melt processability while retaining excellent mechanical properties.

Abstract: Disclosed are oxygen-scavenging polymer compositions having high transparency and low haze comprising immiscible blends of at least one polyester comprising 2,2,4,4-tetramethyl-1,3-cyclobutanediol, a copolyamide or a transamidized, homogeneous blend of a least two polyamides, and a metal catalyst. The components of the immiscible blend which have refractive indices which differ by about 0.006 to about ?0.0006. The small difference in the refractive indices enable the incorporation of regrind into the polymer composition to produce transparent shaped articles. The blends of the present invention are useful in producing shaped articles such as, for example, sheeting, films, tubes, bottles, preforms and profiles. These articles may have one or more layers and can exhibit improved excellent barrier properties and good melt processability while retaining excellent mechanical properties.

Abstract: Disclosed is a process for the preparation of shaped articles such as, for example, sheeting, films, tubes, bottles, preforms and profiles, having high transparency and low haze, and comprising immiscible blends of at least one polyester comprising 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and a copolyamide or a transamidized, homogeneous blend of a least two polyamides. The components of the immiscible blend have refractive indices which differ by about 0.006 to about ?0.0006. The small difference in the refractive indices enable the incorporation of regrind into the polymer composition to produce transparent shaped articles. These articles may have one or more layers and can exhibit improved excellent barrier properties and good melt processability while retaining excellent mechanical properties. Metal catalysts can be incorporated into the compositions to produce shaped articles having oxygen-scavenging properties.

Abstract: A method is provided for preparing a polymer derivative of docetaxel provided by an ester linkage between at least one hydroxyl group of docetaxel and a carboxyl group of an aspartic acid side chain of a block copolymer containing polyethylene glycol and polyaspartic acid, which method includes a step of adjusting the ratio and/or the number of docetaxel molecules linked to the block copolymer to thereby control the release rate of docetaxel from the resultant polymer derivative of docetaxel.

Abstract: The present invention relates to a transparent amorphous polyamide which results from the condensation of at least one diamine chosen from aromatic, arylaliphatic and cycloaliphatic diamines, of tetradecanedioic acid or of a mixture comprising at least 50 mol % of tetradecanedioic acid and at least one diacid chosen from aliphatic, aromatic and cycloaliphatic dicarboxylic acids. The invention also relates to a composition comprising, by weight, 1 to 100% of the preceding polyamide and 99 to 0% of a semicrystalline polyamide. The invention also relates to the objects composed of the composition of the invention, such as panels, films, sheets, pipes, profiles or objects obtained by injection moulding. The invention also relates to objects covered with a transparent protective layer composed of the composition of the invention.

Abstract: Disclosed is a process for the preparation of shaped articles such as, for example, sheeting, films, tubes, bottles, preforms and profiles, having high transparency and low haze comprising immiscible blends of one or more thermoplastic polymers selected from polyesters, polycarbonates, and polyarylates, and a copolyamide or a transamidized, homogeneous blend of a least two polyamides. The components of the immiscible blend which have refractive indices which differ by about 0.006 to about ?0.0006. The small difference in the refractive indices enable the incorporation of regrind into the polymer composition to produce transparent shaped articles. These articles may have one or more layers and can exhibit improved excellent barrier properties and good melt processability while retaining excellent mechanical properties. Metal catalysts can be incorporated into the compositions to produce shaped articles having oxygen-scavenging properties.

Abstract: Disclosed are polymer compositions having high transparency and low haze comprising immiscible blends of at least one polyester comprising 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and a copolyamide or a transamidized, homogeneous blend of a least two polyamides. The components of the immiscible blend have refractive indices which differ by about 0.006 to about ?0.0006. The small difference in the refractive indices enable the incorporation of regrind into the polymer composition to produce transparent shaped articles. The blends of the present invention are useful in producing shaped articles such as, for example, sheeting, films, tubes, bottles, preforms and profiles. These articles may have one or more layers and can exhibit improved excellent barrier properties and good melt processability while retaining excellent mechanical properties. Metal catalysts can be incorporated into the compositions to produce oxygen-scavenging compositions.

Abstract: Polyamide porous spherical particles having a number-average particle diameter of 2 to 30 ?m, a BET specific surface area of 100 to 80,000 m2/kg, and a ratio of a volume-average particle diameter to the number-average particle diameter in the range of 1.52 to 2.50 is reduced in luminous reflectance.

Abstract: The invention relates to a polyamide comprising at least one repeat unit corresponding to the general formulation: X·Y in which: X represents a cycloaliphatic diamine and Y represents an aliphatic dicarboxylic acid chosen from dodecanedioic (C12) acid, tetradecanedioic (C14) acid and hexadecanedioic (C16) acid, characterized in that said dicarboxylic acid comprises organic carbon of renewable origin, determined according to Standard ASTM D6866. The invention also relates to a composition comprising this polyamide and also to the use of this polyamide and of such a composition.

Abstract: The invention relates to polyamide moulded masses based on semi-crystalline, transparent copolyamides predominantly based on aliphatic monomers, for producing transparent or pigmentable moulded parts with a high level of flexibility, high notch-impact strength (Charpy), low water absorbency and excellent resistance to chemicals, containing between 40 and 100 wt. % of at least one transparent copolyamide (constituent A) with a maximum glass transition temperature (Tg) of 80° C. and a melting temperature of at least 150° C.

Abstract: A continuous process for the multistage drying and postcondensation of polyamide pellets in the solid phase comprises 1) carrying out the predrying process in a continuous drying apparatus which is operated in countercurrent mode or in crossflow mode with inert gas or steam, or with a mixture of inert gas and steam, using a pellet temperature in the range from 70 to 200° C., and 2) Carrying out the subsequent continuous postcondensation process in a separate vertical duct with moving bed at a pellet temperature in the range from 120 to 210° C., where the duct is operated in countercurrent mode with inert gas or steam, or with a mixture of inert gas and steam, the inert gas is introduced at least two sites along the duct, and from 15 to 90% of the inert gas is introduced at the base of the vertical duct and from 10 to 85% of the inert gas is introduced in the upper half below the surface of the pellets.

Abstract: The invention relates to a polyamide moulding compound containing 70 to 99.5% by weight of at least one thermoplastic polyamide and 0.5 to 30% by weight of at least one polyamide oligomer with linear or branched chain structure with a number average molar mass of 800 to 5000 g/mol with basic end groups which are at least partially NH2 end groups, and carboxyl end groups, one of these end groups being present in excess and the concentration of the end group present in excess being at most 300 mmol/kg.

Abstract: The present invention provides a polyamide resin composition and a method of preparing the composition. The composition includes a first polyamide resin, a second polyamide resin different from the first, a transition metal, and a lubricant. The first polyamide resin has an extractable fraction of nylon 6 oligomer at least one percent as determined by ISO 6427. The composition is optimized for relative viscosity, viscosity number, moisture content, and an amount of extractables.

Abstract: Polyamide blend molding compound, includes a polyamide blend content and at least one impact-resistant component, characterized in that the polyamide blend content includes the following polyamides: (A) 20 to 65% by weight of at least one semi-crystalline polyamide with an enthalpy of fusion >40 J/g and with an average of at least 8 C atoms per monomeric unit; (B) 8 to 25% by weight of at least one amorphous and/or microcrystalline polyamide, with the microcrystalline polyamide having an enthalpy of fusion in the range of 4 to 40 J/g, and (C) 1 to 20% by weight of at least one polyamide with an average of a maximum of 6 C atoms per monomeric unit. The impact-resistant component includes as follows: (D) 10 to 40% by weight of a polyamide elastomer which is composed of hard segments and soft segments, with the hard segments being based on lactams and/or amino-carboxylic acids, and (E) 0 to 35% by weight of a non-polyamide elastomer.

Abstract: This disclosure provides a medical device and a method of forming the medical device. The medical device comprises a coating comprising a type-one polymer and a type-two polymer. The type-one polymer comprises at least two different blocks, at least one L1 block with the formula ; and at least one L2 block with the formula Medical devices comprising these polymers, mixtures of these polymers with therapeutic agents, and methods of making these polymers and mixtures are within the scope of this disclosure.

Abstract: At an optional stage in the production step of a biaxially stretched film using a polyamide resin including, as a first component, nylon 6, and as a second component, a polyamide including xylylenediamine and an aliphatic dicarboxylic acid having 4 to 12 carbon atoms, the film is brought into contact with water set at 40° C. or higher and lower than 70° C. for 1 to 10 minutes and further with water set at 70° C. or higher for 1 to 10 minutes. In the film thus obtained, the content of low molecular weight compounds is 0% by mass to 0.2% by mass.

Abstract: The present invention relates to the field of polymer chemistry and more particularly to multiblock copolymers and methods of preparing the same.

Abstract: A copolymer and a process of making the copolymer are disclosed. The copolymer is produced from reacting a glycidyl ester and/or ether with a polyol comprising a functionality of at least 2 wherein at least 50% by weight of the copolymer comprises a minimum of 3n+X repeating units, wherein n is a monomer unit and X is a monomer unit and/or other reactant. The copolymer may also include less than 50% of the polymeric units having the same molecular weight. The present invention is further directed to processes for preparing the copolymer and to coating compositions employing the copolymer.

Abstract: The present invention relates to the use of a microcrystalline polyamide for obtaining an object having all or part of its outer surface formed from this microcrystalline polyamide and having a particular surface finish, in which: the manufacture of the object comprises steps carried out hot between the Tg (glass transition temperature) and the Tm (melting point) of this microcrystalline polyamide; the transparency of the microcrystalline polyamide is such that the light transmission at 560 nm on a polished object 1 mm in thickness is greater than 80%, advantageously greater than 88%, the transparency being measured on the object obtained by standard processing methods, such as injection moulding and sheet extrusion/calendering.

Abstract: A process of producing an asymmetric membrane of multicomponent polyimide. The process includes the steps of (1) preparing a multicomponent polyimide blend solution by mixing a polyimide component A having a number-averaged polymerization index NA and a polyimide component B having a number-averaged polymerization index NB, wherein NA and NB satisfies equation 1: 2.35×NA?2.09<NB<450×NA?1.12??1 (2) subjecting the multicomponent polyimide blend solution to further polymerization and imidation reaction, and (3) causing a phase inversion in the resulting multicomponent polyimide blend solution to form an asymmetric membrane. The polyimide component A is raw materials of polyimide A containing a fluorine atom in the chemical structure thereof and/or a polymerization and imidation reaction product of the raw materials. The polyimide component B is raw materials of polyimide B and/or a polymerization and imidation reaction product of the raw materials.

Abstract: A process for synthesizing formulations for polyimides suitable for use in high-temperature composites in which all reactions other than chain-extension have already taken place prior to making a composite is described, wherein the resulting oligomers comprise a backbone and at least one difunctional endcap. The resulting resin systems have only the single step of endcap-to-endcap reactions during composite processing. Prior to the initiation temperature of these endcap-to-endcap reactions, the resins are stable affording the composite manufacturer a very large processing window.

Abstract: The present invention provides a process for preparing a solvent-soluble polyimide copolymer synthesized from a 6,6-imide segment having an imide oligomer with PMDA at both ends produced by adding 4 molar equivalents of pyromellitic dianhydride (PMDA) and 2 molar equivalents of diaminotoluene (DAT) to an imide oligomer produced by heating 1 molar equivalent of biphenyltetracarboxylic dianhydride (BPDA) and 2 molar equivalents of diaminodiphenyl ether (DADE) at 160-200° C. in the presence of a catalyst in an organic polar solvent.

Abstract: The present invention refers to a multilayer heat shrinkable film characterized by a combination of desirable properties, such as high shrinkage, good optical properties, excellent sealability, high abuse and high puncture resistance. The invention further is directed to a method of producing said film. The invention is further directed to the use of said film or bags and pouches made thereof for packaging goods as for example food products. The invention also refers to tubes made with the film.

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.