Abstract: Disclosed is a process for preparation of a propylene-based polymer composition involving the steps of: (a) mixing a propylene-based polymer and a peroxydicarbonate in a mixing device, wherein the mixing takes place at a temperature of ?30° C., wherein the peroxydicarbonate is introduced into the mixing process in a dry form; (b) keeping the mixed composition at a temperature of ?30° C.; (c) feeding the mixed composition into a melt extruder; (d) homogenizing the mixed composition at a temperature where the propylene-based polymer is in solid state during an average residence time of ?6.0 and ?30.0 seconds; (e) further homogenizing the mixed composition at a temperature at which the propylene-based polymer is in the molten state; and (f) extruding the homogenized material from a die outlet of the melt extruder followed by cooling and solidification; wherein the steps (a) through (f) are conducted in that order.

Abstract: The present invention relates to a thermoplastic polyester copolymer comprising 50-1000 ppm with regard to the total weight of the thermoplastic polyester copolymer of moieties derived from an alcohol having ?3 hydroxy moieties. Such thermoplastic polyester copolymer allows for the production of high-quality foamed articles, whilst reducing the need for additives that are to be incorporated in the copolymer.

Abstract: Disclosed is a process for preparation of a propylene-based polymer composition involving the steps of: (a) mixing a propylene-based polymer and a peroxydicarbonate in a mixing device, wherein the mixing takes place at a temperature of ?30° C., wherein the peroxydicarbonate is introduced into the mixing process in a dry form; (b) keeping the mixed composition at a temperature of ?30° C.; (c) feeding the mixed composition into a melt extruder; (d) homogenizing the mixed composition at a temperature where the propylene-based polymer is in solid state during an average residence time of ?6.0 and ?30.0 seconds; (e) further homogenizing the mixed composition at a temperature at which the propylene-based polymer is in the molten state; and (f) extruding the homogenized material from a die outlet of the melt extruder followed by cooling and solidification; wherein the steps (a) through (f) are conducted in that order.

Abstract: A foamed material includes 50 to 90 weight percent of a semicrystalline resin and 10 to 50 weight percent of a poly(phenylene ether). The semicrystalline resin can be one or more of a polyamide, a polyester, and a polyolefin. The foamed material has a density of 40 to 700 kilograms/meter3. It can be prepared by adding a blowing agent to a molten thermoplastic material containing the semicrystalline resin and the poly(phenylene ether), thereby forming a pre-foamed molten thermoplastic material, and extruding the pre-foamed molten thermoplastic material to form the foamed material. The foamed material is useful to form articles requiring solvent resistance.

Abstract: An anisotropic polycarbonate foam is disclosed. The polycarbonate foam has a low open cell content, and has improved mechanical properties as specified herein. A process for making an anisotropic polycarbonate foam, can comprise: melting a polycarbonate in an extruder to obtain a molten formulation; injecting a blowing agent into the molten formulation; mixing the molten formulation to obtain a single phase mixture; and extruding the single phase mixture through a die to obtain the anisotropic polycarbonate foam.

Abstract: An armature for an illuminant can comprise: walls formed by an armature composition. The armature composition can comprise an armature polymer, 10 wt % to 20 wt % coated titanium dioxide, and greater than zero to 0.001 wt % carbon black, wherein the weight percentages are based upon a total weight of the armature composition. The armature polymer can comprise polycarbonate. At a thickness of greater than or equal to 3 mm, the armature has a reflection at 700 nm of greater than or equal to 93%. A light fixture can comprise a light source in the armature.