Abstract: The invention relates to a process for preparing polymeric particles, based on the use of a polyester polymer (PE) comprising units from a dicarboxylic acid component and a diol component, wherein at least 2 mol. % of the diol component is a poly(alkylene glycol). The process comprises the melt-blending of the aromatic polymer (P) with the PE, the cooling the blend and the recovery of the particles by dissolution of the PE into water. The present invention relates to polymeric particles obtained therefrom and to the use of these particles in SLS 3D printing, coatings and toughening of thermoset resins.

Abstract: The present invention provides an electret sheet that exhibits excellent piezoelectricity even by light stress. The electret sheet of the invention is characterized by including a charged porous sheet, in which the electret sheet has a compressive elastic modulus of 80 to 300 MPa when compressively deformed at 25° C. and a 50% compression stress of 120 to 300 kPa at 25° C., and thus has the excellent piezoelectricity for light stress and exhibits the excellent piezoelectricity even by light stress (0.5N or less) caused by a pulse wave or a breathing.

Abstract: The present invention relates to elastomeric polymer fiber reinforced asphalt cement concrete for use in a variety of applications. In particular, the reinforcement fibers are effective to reduce or preclude voids and/or cracks formed in the asphalt upon placement and to render a self-healing property to the placed asphalt.

Abstract: A method for manufacturing a crosslinked polyolefin separator and the crosslinked polyolefin separator obtained therefrom are provided. The method includes non-grafted polyolefin having a weight average molecular weight of 300,000 or more and silane-grafted polyolefin having a weight average molecular weight of 300,000 or more. The method minimizes gel formation, a side reaction occurring in an extruder during the manufacture of the separator, and provides the separator having a uniform surface.

Abstract: Methods of vulcanization using a high content sulfur polymer, instead of elemental sulfur, have been developed. These high sulfur content polymers are referred to as Chalcogenide Hybrid Inorganic/Organic Polymers (CHIP) materials and have good polymer compatibility in that they are soluble in a number of polymers. Furthermore, CHIP materials may have weaker bonds than the S—S bonds of elemental sulfur and thus provide for a higher crosslinking efficiency vulcanization.

Abstract: The invention discloses one method of producing polyether polymer dispersant and polyether polymer, wherein the dispersant is a copolymer macromolecule prepared by the propylene oxide or ethylene oxide with an average molecular weight of 6000 to 20000, with containing at least one benzene ring group and one polymerizable carbon-carbon double or triple bond polymer. The preparation method of the dispersant is: synthesizing a basic polyether polyol, adding a cyclic dicarboxylic anhydride into the polyether polyol, then the polyether polyol is reacted with an epoxy compound with the polymerizable double bond, and capping with an epoxy compound to obtain the dispersant; preparing the polymer polyol by the basic polyol, an unsaturated vinyl monomer styrene and acrylonitrile, a polymerization initiator, the dispersant and an optional chain transfer agent; the basic polyether is a polyether polyol with a functionality of 3 to 8.

Abstract: The present invention relates to a self-adhesive powder composition comprising: at least one polyamide; at least one ethylene vinyl alcohol copolymer; at least one hydrophobic agent; and optionally at least one filler.

Abstract: The present invention provides ethylene-vinyl alcohol copolymer composition pellet reduced in coloration. The ethylene-vinyl alcohol copolymer composition pellet of the invention include an ethylene-vinyl alcohol copolymer (A), a polyamide resin (B), and an alkaline earth metal salt (C) and have a yellowness index (YI) value of 10 or less when examined with a spectral color-difference meter by a transmission method.

Abstract: The present disclosure discloses a high-performance rubber damping material and a method for preparing the same, relating to the technical field of damping materials. The method for preparing the high-performance rubber damping material includes: grafting hydroxyethyl methacrylate and lignin to a rubber molecular chain of natural rubber latex through graft copolymerization reaction, so as to obtain a high-performance rubber damping material. This method adopts natural rubber latex as a base material, the hydroxyethyl methacrylate and lignin are grafted to the rubber molecular chain of natural rubber latex through graft copolymerization reaction, to form a semi-interpenetrating network structure.

Abstract: Embodiments provide methods of disassembling apparel products. The methods include exposing an adhesive of the apparel product to a composition having an acidic or basic pH. The adhesive is disposed at least partially between a major component and a minor component of the apparel product. The adhesive includes a material having a disulfide bond. The major component forms a base portion of the apparel product and is configured to be supported and worn at least partially over a portion of a wearer. The minor component forms a secondary portion configured to be coupled to the major component with the adhesive. The methods include separating the major component from the minor component adjoined by the adhesive.

Abstract: A method for manufacturing a polyimide composite film for a flexible metal-clad substrate includes the following steps, providing a polyamide acid solution; providing fluorine polymer particles and mixing the fluorine polymer particles with a dispersant and an organic solution to prepare a fluorine polymer particle dispersion; forming a colloidal polyimide film from the polyamide acid solution; and coating the colloidal polyimide film with the fluorine polymer particle dispersion and then performing baking to form a polyimide composite film.

Abstract: A core/shell polymer material suitable for three-dimensional printing is provided. The core/shell polymer material may include at least one amorphous polymer as a core particle and at least one semicrystalline polymer as a shell material surrounding the core particle.

Abstract: Disclosed are new classes of diphenol compounds, derived from tyrosol or tyrosol analogues, which are useful as monomers for preparation of biocompatible polymers. Also disclosed are biocompatible polymers prepared from these monomeric diphenol compounds, including novel biodegradable and/or bioresorbable polymers of formula These biocompatible polymers or polymer compositions with enhanced bioresorbabilty and processibility are useful in a variety of medical applications, such as in medical devices and controlled-release therapeutic compositions. The invention also provides methods for preparing these monomeric diphenol compounds and biocompatible polymers.

Abstract: The present invention is directed to a polymerizable composition comprising (A) a reaction product of: (a) diethyleneglycol bischloroformate, ethyleneglycol bischloroformate, or combinations thereof; (b) allyl alcohol; (c) optionally, a cyclic polyol selected from the group consisting of a cycloaliphatic polyol having at least one secondary hydroxyl group, a heterocyclic polyol having primary and/or secondary hydroxyl groups, and mixtures thereof; and (d) optionally, at least one linear or branched aliphatic polyol having two to six hydroxyl groups; and (B) an organic peroxide comprising at least three peroxide groups. A polymerizate and/or an optical article comprising the polymerizable compositions of the invention are also provided.

Abstract: Embodiments provide methods of assembling apparel products. The methods include applying a composition to a portion of a major component of the apparel product or a portion of a minor component of the apparel product. The methods include coupling the portion of the minor component with the portion of the major component via the composition. The major component forms a base portion of the apparel product and is configured to be supported and worn at least partially over a portion of a wearer. The minor component forms a secondary portion configured to be coupled to the major component with an adhesive. The methods include converting the composition to the adhesive. The adhesive including a material having a disulfide bond.

Abstract: Disclosed herein is a styrenic block copolymer [A1-B1-C1], consisting essentially of polymer blocks A1, B1 and C1. A1 is a poly(para-alkylstyrene) block having a molecular weight from 1,000 to 60,000 g/mol. B1 is a hydrogenated polyisoprene block or a hydrogenated polybutadiene block having a molecular weight from 1,000 to 100,000 g/mol. C1 is a polystyrene block having a molecular weight from 1,000 to 100,000 g/mol; or a polymer block consisting essentially of polymerized styrene units, and hydrogenated butadiene and/or isoprene units, and having a molecular weight from 1,000 to 100,000 g/mol. Prior to hydrogenation, the block B1 has a vinyl content of 5-75 mol %; and the block C1 forms 1-80 wt % of the overall weight of the block copolymer. The selectively sulfonated forms of the copolymers are useful as high dielectric materials.

Abstract: Processes are described for producing an aromatic diamine-initiated polyether polyol having a measured OH number of 300 to 500 mg KOH/g and a viscosity at 25° C. of 5000 to 50,000 mPas. The processes include a first alkoxylation step in which an alkylene oxide consisting essentially of propylene oxide is reacted with a starter consisting essentially of aromatic diamine at a molar ratio of propylene oxide to aromatic diamine of 1.4:1 to 2.0:1 to form an alkoxylated product; and a second alkoxylation step in which an alkylene oxide consisting essentially of propylene oxide is reacted with the alkoxylated product, in the presence of an added catalyst, until the ratio of moles of propylene oxide added in the process to the moles of aromatic diamine added in the process is 4:1 to 9:1.

Abstract: Polymers are disclosed that incorporate portions of secondary or tertiary polyamide segments connected with polyisocyanates. These polymers have enhanced matting properties. The enhanced matting properties are from creating an inherently matt surface from the polymer without the use of any separate fine particle size matting additives. Conventional matting agents such as fine particle size silica usually results in loss of physical properties such as haze development and porosity in the coating from the matting agent. Composites and hybrids of these polymers and other polyamides, polyurethane with vinyl polymers (acrylates) are also disclosed and claimed.

Abstract: A glove including a cured film of an elastomer containing a (meth)acrylonitrile-derived structural unit, an unsaturated carboxylic acid-derived structural unit and a butadiene-derived structural unit in a polymer main chain, wherein the elastomer contains 20 to 40% by weight of a (meth)acrylonitrile-derived structural unit, 1 to 10% by weight of an unsaturated carboxylic acid-derived structural unit and 50 to 75% by weight of a butadiene-derived structural unit, and has a crosslinked structure of a carboxyl group in the unsaturated carboxylic acid-derived structural unit with an epoxy crosslinker containing an epoxy compound having three or more epoxy groups in one molecule.

Abstract: Bio-electronic devices including a substrate layer composed of a thiol-ene shape memory polymer, the polymer including, a sequential chain of a first type of monomer covalently bonded to a second type of monomer via thiol-ene linkages that form a backbone of the polymer, and. at least one patterned gold interconnect line adhered to the substrate layer.