Abstract: The invention relates to heat treatment of polymorphic semicrystalline or crystallizable polymers to increase the content of the highest melting crystalline form. Such heat treatment results in a polymer powder that has a consistent, uniform melting range, improved flow and improved durability of the powder particle size for applications that require powder flow at elevated temperatures. In addition to improved powder properties, the articles produced from the powders also exhibit better physical properties in both appearance and in mechanical properties. Thus the invention also includes polymer powders and articles produced by the described processes.

Abstract: Processes for fabricating secondary structures of gas turbine engines from polymer-based materials, and secondary structures formed thereby. The processes entail performing an additive manufacturing technique to produce a secondary structure of a gas turbine engine. The additive manufacturing technique directly produces the secondary structure from a polymer-based material to have a complex three-dimensional shape characterized by portions that lie in different planes.

Abstract: A self-sensitive polymerizable liquid resin is provided, which contains an uncrosslinked Michael addition reaction product of the following components: a Michael donor, a Michael accepter and optionally a viscosity modifier. The Michael accepter has 5 to 18 acryloyl functional groups. The self-sensitive polymerizable liquid resin of the present invention is capable of being used as an aid in a coating composition and providing a good property in deep radiation curing, and is particularly applicable in color coatings.

Abstract: To provide a resin composition that contains a solvent-soluble polyimide and can provide a film exhibiting high viscoelasticity and flexibility at high temperatures. To attain this, a polyimide resin composition is provided that includes a polyimide having a polycondensation unit of a tetracarboxylic acid dianhydride and a diamine, wherein the tetracarboxylic acid dianhydride includes an (?1) tetracarboxylic acid dianhydride represented by general formula (1), or the diamine includes an (?1) aromatic diamine represented by general formula (2), the diamine includes an (?2) aliphatic diamine represented by general formula (3) or (4), a total amour of the (?1) tetracarboxylic acid dianhydride and the (?1) aromatic diamine is 5 to 49 mol % with respect to a total amount of the tetracarboxylic acid dianhydride and the diamine, and an amine equivalent of the polyimide is 4,000 to 20,000.

Abstract: A thermoplastic fiber comprises a core constructed of a first material, a shell positioned to surround the core and constructed of a second material, and magnetic particles that are ferromagnetic and/or ferrimagnetic particles where the particles are either mainly, almost exclusively, or exclusively arranged in the shell. A fiber perform or semifinished textile product includes at least one thermoplastic fiber. A hybrid yarn comprises reinforcement fibers, thermoplastic fibers, and at least some of the plurality of thermoplastic fibers include at least proportionately ferromagnetic and/or ferrimagnetic particles.

Abstract: A polyaryletherketone polymeric material, for example polyetheretherketone and composite materials comprising said polymeric material are described. The polymeric material has a melt viscosity (MV) in the range 0.05 to 0.12 kNsm?2, preferably in the range 0.085 to 0.095 kNsm?2.

Abstract: Polymer compositions comprising poly(aryl ether ketone)s and graphene materials. In particular, a polymer composition comprising: A) a poly(arylether ketone) and B) 0.1 to 70 wt. %, based on the combined weight of A) and B), of at least one non-tubular graphene material. Use of such polymer compositions for the manufacture of molded or extruded articles. Molded or extruded articles made from such polymer compositions.

Abstract: There is provided a resist underlayer film forming composition for forming a resist underlayer film providing heat resistance properties and hardmask characteristics. A resist underlayer film forming composition for lithography, comprising: a polymer containing a unit structure of Formula (1): ?O—Ar1???Formula (1) (in Formula (1), Ar1 is a C6-50 arylene group or an organic group containing a heterocyclic group), a unit structure of Formula (2): ?O—Ar2—O—Ar3-T-Ar4???Formula (2) (in Formula (2), Ar2, Ar3, and Ar4 are individually a C6-50 arylene group or an organic group containing a heterocyclic group; and T is a carbonyl group or a sulfonyl group), or a combination of the unit structure of Formula (1) and the unit structure of Formula (2). The organic groups of Ar1 and Ar2 containing arylene group may be organic groups containing a fluorene structure.

Abstract: A method for forming a resist underlayer film of a multilayer resist film having at least three layers used in a lithography, includes a step of coating a composition for resist underlayer film containing a novolak resin represented by the following general formula (1) obtained by treating a compound having a bisnaphthol group on a substrate; and a step of curing the coated composition for the resist underlayer film by a heat treatment at a temperature above 300° C. and 600° C. or lower for 10 to 600 seconds. A method for forming a resist underlayer film, and a patterning process using the method to form a resist underlayer film in a multilayer resist film having at least three layers used in a lithography, gives a resist underlayer film having a lowered reflectance, a high etching resistance, and a high heat and solvent resistances, especially without wiggling during substrate etching.

Abstract: An adhesive composition has a polymer that contains a unit structure of Formula (1): ?L1-O-T1-O???Formula (1) (where L1 is an arylene group or a combination of an arylene group and a sulfonyl group or a carbonyl group, and T1 is a fluoroalkylene group, a cyclic alkylene group, an arylene group having a substituent, or a combination of an arylene group optionally having a substituent and a fluoroalkylene group or a cyclic alkylene group) and contains, at a terminal or in a side chain or the main chain, at least one group containing a structure of Formula (2-A), a structure of Formula (2-B), or both structures:

Abstract: Disclosed are coating compositions that can be one-component, ambient curable, and waterborne. The coating compositions comprise acrylic copolymer resin particles comprising carbonyl functional groups and a crosslinking agent comprising functional groups, such as hydrazide groups, that are reactive with carbonyl groups.

Abstract: The present invention relates to biodegradable polymers (e.g., polyesters and polyester amides) derived from functionalized biologically active compounds that can provide site specific delivery of bioactive compounds upon biodegradation in a controlled manner.

Abstract: Photoactivatable prepolymers and methods of use thereof are disclosed for microencapsulation of a substantially water-insoluble material within a nonporous shell. As provided herein, the microencapsulated material is released with no more than a slow release rate. Upon exposure of the nonporous shell to light, the nonporous shell is converted into a porous shell having an increased release rate for the microencapsulated material.

Abstract: Structured films containing multi-walled carbon nanotubes (“MWCNTs”) have enhanced mechanical performance in terms of strength, fracture resistance, and creep recovery of polyimide (“PI”) films. Preferably, the loadings of MWCNTs can be in the range of 0.1 wt % to 0.5 wt %. The strength of the new PI films dried at 60° C. increased by 55% and 72% for 0.1 wt % MWCNT and 0.5 wt % MWCNT loadings, respectively, while the fracture resistance increased by 23% for the 0.1 wt % MWCNTs and then decreases at a loading of 0.5 wt % MWCNTs. The films can be advantageously be created by managing a corresponding shift in the annealing temperature at which the maximum strength occurs as the MWCNT loadings increase.

Abstract: A liquid crystalline polymer composition having a relatively high comparative tracking index (“CTI”) is provided. The present inventors have discovered that high CTI values can be achieved through the use of inorganic particles in combination with a functional aromatic compound. While not fully understood, it is believed that the functional compound can react with the liquid crystalline polymer and create smaller degraded polymer chains. In combination with the inorganic particles, these smaller chains can potentially form insulated regions at the surface of the polymer that hinder the formation of conductive carbonaceous deposits during the tracking process, which could otherwise lead to failure during testing.

Abstract: A curable formaldehyde-free binding composition for use with fiberglass is provided. Such curable composition comprises an acid-catalyzed reaction product of an aldehyde or ketone with a multihydric alcohol. When heated, the composition forms polyacetal or polyketal that undergoes curing to form a water-insoluble resin binder which exhibits good adhesion to glass. In a preferred embodiment, maleic anhydride initially serves as a catalyst and subsequently enters into a cross-linking reaction during curing to form a poly(ester-acetal). Also, in a preferred embodiment, the fiberglass is in the form of building insulation. In other embodiments the product can be a microglass-based substrate for use in a printed circuit board, battery separator, filter stock, or reinforcement scrim.

Abstract: There is provided a polymer compound having excellent transparency and excellent heat resistance, a high refractive index, an excellent solubility in various solvents, and a low viscosity and excellent handling properties when the polymer compound is dissolved in a solvent; and a production method of the polymer compound; and a polymer composition containing the polymer compound. And there is also included an aroylbiphenyl compound of Formula (1): [in Formula (1), X is a halogen atom, and R1 is a hydrogen atom or a group of Formula (2a) or Formula (2b); and in Formula (2a) and Formula (2b), R2 and R3 are independently a hydrogen atom or a C1-6 alkyl group]; a polymer compound obtained by using the aroylbiphenyl compound; and a thermocurable film forming polymer composition comprising: as a component (A), the polymer compound, and as a component (B), a crosslinkable compound.

Abstract: The invention relates to dispersing resins for solids which are obtainable through the partial or complete reaction of the hydroxyl groups of carbonyl-hydrogenated ketone-aldehyde resins with one or more oxiranes and, if desired, subsequent complete or partial esterification with organic and/or inorganic acids.

Abstract: A method of making a polymeric material is described, the method comprising contacting, for example polycondensing, a compound of formula with a compound of formula wherein each X is selected from a group comprising a chlorine and a fluorine atom, n represents 1, 2 or 3 and each Y1 is selected from a group comprising an alkali metal and a hydrogen atom.

Abstract: A roller is essentially consisting of a resin composition that contains, as a base resin, a copolymer essentially consisting of a repeating unit expressed by a formula (i): where “a” denotes a number from 4 to 9, a repeating unit expressed by a formula (ii): and a repeating unit expressed by a formula (iii): where “b” denotes a number from 9 to 11, the roller being formed in an annular shape. In a roller device, the roller is arranged to cover an outer periphery of an outer ring of a rolling bearing that includes an inner ring, the outer ring, and rolling elements.

Abstract: A liquid crystal alignment agent includes a polymer composition (A) and a solvent (B) for dispersing the polymer composition (A). The polymer composition (A) is obtained by subjecting a diamine component (a) and a tetracarboxylic dianhydride component (b) to a polymerization reaction. The diamine component (a) includes at least one diamine compound (a-1) having a dipole moment up to 2.8D.

Abstract: The present invention relates to a coating composition, especially, relates to an aqueous coating composition with improved liquid stain repellency, it has a fraction of critical pigment volume concentration of from 35% to 110%, and comprises (i) pigment composition, including 15 wt. %-100 wt. %, in percentage by weight based on the dry weight of the pigment composition, polymer-encapsulated pigment; and 0-85 wt. %, in percentage by weight based on the dry weight of the pigment composition, un-encapsulated pigment; and (ii) 0.01 wt. %-5 wt. %, in percentage by dry weight based on the wet weight of the aqueous coating composition, at least one paraffin wax emulsion.

Abstract: Provided is a film comprising a polymer that comprises a structural unit represented by the following formula (1), wherein at least part of the terminal structure of the polymer is at least one structure selected from the group consisting of structural units represented by the following formula (2) and structural units represented by the following formula (3).

Abstract: A thermoplastic material comprises the cure product of a thermoplastic polymer having a thermal decomposition temperature greater than or equal to about 200° C., the thermoplastic polymer being cured at a temperature of about 200° C. to about 400° C., for a total time of less than or equal to 200 hours. An article is formed from the thermoplastic material.

Abstract: A polymer compound containing a structure of the following formula (B): —Ar—??(A) (wherein, Ar represents an arylene group, divalent heterocyclic group, divalent aromatic amine group or divalent group having a metal complex structure.) (wherein, A ring and B ring represent each independently an aromatic ring optionally having a substituent. X1 represents —C(?O)—, —S(?O)—, —S(?O)2—, —P(?O)(R1)—, —C(R1)(R2)—, —C(R2)(R2)—, —B(R1)—, —N(R1)— or —Si(R1)(R1)—. R* represents a hydrogen atom or monovalent or divalent group, R1 represents a hydrogen atom or monovalent group, and R2 represents a monovalent group having a hetero atom. When R1 and R2 are present each in plural number, they may be the same or different.).

Abstract: A novel novolac prepared by acid catalyzed condensation between biphenols or bisphenofluorenes and fluorenone is presented. The polymers exhibit excellent oxidative thermal stability and high carbon content, suitable for dielectric, etch stop applications as spin-on material.

Abstract: Thermosetting colored powder paints to be used in electrostatic painting processes are described. These powder paints comprise not more than 30% by weight of at least one monochromatic pigment coated with at least one aldehyde and/or ketone resin, preferably 5 to 30% by weight, and up to 95% by weight of conversion agent, preferably 70 to 95% by weight; more than 90% of the particles of said at least one coated monochromatic pigment and said conversion agent have a particle size of between 10 and 40 microns, preferably between 15 and 35 microns. The coated monochromatic pigment and the conversion agent have the same specific weight which is between 1.3 and 1.7 g/cc.

Abstract: The present invention relates to a bioactive composition obtained through the technique of electrospinning and composed of at least one polymer. Furthermore, the invention also discloses a process for the incorporation of such electrospun bioactive composition, as a coating over a plastic matrix to obtain composite materials for their use in both biodegradable and non-biodegradable biomedical implants and in tissue engineering.

Abstract: A polyamide modified by a multi-functional compound, and a method for producing said polyamide and compositions comprising same are described. A method for the production of a polyamide comprising linear macromolecular chains and star-shaped macromolecular chains is also described. A resulting polyamide having optimal mechanical and rheological properties in order to (i) improve mould filling speed and quality, and (ii) produce moldable compositions with high filler contents is also described.

Abstract: Provided is an ink composition capable of forming images having excellent water resistance, excellent solvent resistance and excellent adhesiveness to base materials, the ink composition including (Component A) a polymer containing a repeating unit (a1) having at least one of an aromatic ketone structure and an aliphatic 1,2-diketone structure, a repeating unit (a2) having at least one of a tertiary amine structure and a thiol structure, and a repeating unit (a3) having an ethylenically unsaturated double bond, and (Component B) a coloring material.

Abstract: A curable formaldehyde-free binding composition for use with fiberglass is provided. Such curable composition comprises an acid-catalyzed reaction product of an aldehyde or ketone with a multihydric alcohol. When heated, the composition forms polyacetal or polyketal that undergoes curing to form a water-insoluble resin binder which exhibits good adhesion to glass. In a preferred embodiment, maleic anhydride initially serves as a catalyst and subsequently enters into a cross-linking reaction during curing to form a poly(ester-acetal). Also, in a preferred embodiment, the fiberglass is in the form of building insulation. In other embodiments the product can be a microglass-based substrate for use in a printed circuit board, battery separator, filter stock, or reinforcement scrim.

Abstract: A shape memory structure includes, an elastic material, and a viscoelastic material commingled with the elastic material. The shape memory structure is reformable from a first shape to a second shape upon exposure to a change in environment that softens the viscoelastic material thereby allowing the shape memory structure to creep under stress stored in the elastic material.

Abstract: A method for reducing the concentration of poly(aryl ether ketone) in an original polymer composition that is exposed to an aggressive chemical environment that is more aggressive against poly(biphenyl ether sulfone) than it is against the poly(aryl ether ketone) while maintaining or exceeding at least one of the original polymer composition's tensile strength, tensile modulus, flexural strength and flexural modulus retention ratio after exposure to the aggressive chemical environment.

Abstract: The invention relates to novel monomers of Formula (I) useful for preparation of phase-separated biocompatible polymers or polymer compositions. These polymers or polymer compositions may be bioresorbable and/or biodegradable and have desirable mechanical properties, such as fracture and/or fatigue toughness, which have not been a primary design criteria for such polymers previously. The polymers or polymer compositions are useful in a variety of medical applications, such as in the fabrication of medical devices. Therefore, methods for preparing these polymers or polymer compositions and medical devices are also encompassed by this disclosure.

Abstract: Styrene-acrylic-based binder compositions and methods for their preparation and use are described herein. The binder compositions include a filler and a binder comprising a styrene-acrylic-based copolymer. In some embodiments, the copolymer has a gel content of less than 75%. In some embodiments, the copolymers can be derived from at least one crosslinkable monomer. The weight ratio of filler to binder in the compositions is at least 5:1.

Abstract: By a temper treatment a polyaryletherketone powder is processed such that it is particularly suited for the use in a method for a layer-wise manufacturing of a three-dimensional object. To this effect the powder is tempered at a temperature that is at least 20° C. above the glass transition temperature for at least 30 minutes before it is used as building material.

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: A composite radius filler for use in an aircraft structure. The aircraft structure includes structural composite parts assembled together to form the aircraft structure. The composite radius filler is arranged between rounded sections of the structural composite parts for filling a gap formed between the structural composite parts. The composite radius filler is made structural by a nanostructure arranged within the composite radius filler for the reinforcement of the interface between the radius filler and the structural composite part. A method for producing an aircraft structure including a nano-reinforced radius filler.

Abstract: The present invention relates to fiber glass strands, yarns, fabrics, composites, prepregs, laminates, fiber-metal laminates, and other products incorporating glass fibers formed from glass compositions. The glass fibers, in some embodiments, are incorporated into composites that can be used in reinforcement applications. Glass fibers formed from some embodiments of the glass compositions can have certain desirable properties that can include, for example, desirable electrical properties (e.g. low Dk) or desirable mechanical properties (e.g., specific strength).

Abstract: This invention relates to waterborne coatings with enhanced early water blushing resistance, chemical resistance, and adhesion to substrates. These waterborne coatings can be paints, varnishes, and water sealers that offer excellent early water blushing as well as excellent resistance to common household chemicals, such as gasoline, motor oil, brake fluid, transmission fluid, household cleaners, window cleaning fluids, antifreeze, and the like.

Abstract: The purpose of the present invention is to provide a polyimide resin which exhibits higher heat resistance than that of a conventional polyimide resin by controlling the geometric configuration of the constituent units. Provided is a polyamic acid which comprises repeating units represented by general formula (1), wherein the 1,4-bismethylenecyclohexane skeleton units consist of both trans- and cis-form units, and the contents of the trans- and cis-form units are 60 to 100% and 0 to 40% respectively (with the sum total of the trans- and cis-form units being 100%).

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 provides a dispersant and compositions thereof. The dispersant is a residue of a non-aromatic hydrocarbyl substituted carboxylic acid containing three or more acid groups (A), wherein the dispersant may be represented by the Formula and salts thereof: [U—(Y)x-T-N(R1)c-A]d-Z(Q1)j-Wc, wherein the variables are defined herein.

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: Novel aqueous dispersions of thermoplastic polymers suitable for generation of films, notably for the sizing of fibers for facilitating their handling and for making composite materials.

Abstract: Heat-resistant, high strength fibers useful in a wide range of end-use applications are prepared using a polymeric composition containing polyetherketoneketone and mineral nanotubes.

Abstract: A polyaryletherketone polymeric material, for example polyetheretherketone and composite materials comprising said polymeric material are described. The polymeric material has a melt viscosity (MV) in the range 0.05 to 0.12 kNsm?2, preferably in the range 0.085 to 0.095 kNsm?2.

Abstract: Granules or pellets comprising polymeric materials such as polyaryletherketones and ceramic materials may be prepared and used to make a variety of different parts of components for use in medical applications, by melt-processing. The ceramic material may be a bioactive glass and/or a controlled-release glass, and may include less than 20 mole % sodium oxide and/or be water soluble.

Abstract: A method of manufacturing composite particles is disclosed. The method includes preparing an aqueous dispersion of a polymer (a) by a phase inversion emulsification method, using water and a solution of the polymer (a), the polymer (a) containing at least one anionic structural unit and at least one hydrophobic structural unit; and forming composite particles through seed polymerization using at least one crosslinking monomer (b) in the presence of the aqueous dispersion of the polymer (a). Further, composite particles, an aqueous ink composition and an image forming method using the aqueous ink composition are disclosed.

Abstract: A method comprising (a) mixing a stabilizer comprising a metal-containing compound, the metal-containing compound comprising a metal selected from the group consisting of Group 11-13 metals and combinations thereof, into a dispersant to provide a dispersion; and (b) adding the dispersion to a varnish, is disclosed.