Abstract: A polycarbonate is provided that contains repeat units derived from isosorbide and a residue derived from an activated diaryl carbonate. The polycarbonate has 1H-NMR peaks associated with the repeat units derived from isosorbide. The polycarbonate contains no more than a maximum allowable amount of sorbitol-derived color bodies. If these color bodies are present in the polycarbonate it has a 1H-NMR peak associated with the color bodies. The maximum allowable amount of color bodies are present when the integrated area of the 1H-NMR peak associated with the color bodies divided by the integrated areas of the 1H-NMR peaks associated with the repeat units derived from isosorbide is 0.025.

Abstract: A separation object including at least two types of resins with different glass transition temperatures (glass transition temperature of a first resin 1<glass transition temperature of a second resin 2) is placed on a separating member 3. Next, primary heating is applied at a temperature between the glass transition temperatures of the first resin 1 and the second resin 2, and pressurization is additionally performed to cause the first resin 1 to adhere to the separating member 3. Subsequently, a heat history of secondary heating at a temperature higher than the primary heating temperature is applied to detach and recover the second resin 2 by restoring the shape of the second resin 2, while the first resin 1 adhering to and retained by the separating member 3 is detached by a blade 5 and the like for recovery.

Abstract: Methods of producing ultrahigh molecular weight polyethylene compositions of highly beneficial sintering characteristics are disclosed herein. Some embodiments provide for adding small amounts of a co-monomer to the polyethylene to improve various characteristics, including wear resistance.

Abstract: In the production of elastomers the product obtained from the polymerization process is often in the form of a slurry. Described herein are an apparatus and a process for “finishing” the elastomer, i.e., dewatering and drying the elastomer. The process comprises the steps of obtaining a slurry comprising water and elastomer; passing the slurry through a first dewatering device to produce a wet elastomer crumb, wherein the first dewatering device comprises two dewatering extruders in parallel; passing the wet elastomer crumb through a second dewatering device; and then passing the wet elastomer crumb through a drying device to produce a dried elastomer crumb.

Abstract: The invention embraces polyester resins and containers that include surface-modified talc. The invention also embraces a method for the late introduction of surface-modified talc via a reactive carrier to achieve a polyester resin that is capable of being formed into low-haze, high-clarity bottles possessing reduced coefficient of friction.

Abstract: The invention relates to a combined process for the preparation of polycarbonate by the phase boundary process and downstream electrolysis of sodium chloride-containing process wastewater.

Abstract: A multi-level tubular reactor operable to facilitate a chemical reaction in a reaction medium flowing therethrough. The tubular reactor can include a plurality of horizontally elongated and vertically spaced tubular members coupled to and extending between a pair of horizontally spaced and vertically elongated headers.

Abstract: Disclosed herein is a polycarbonate comprising a terminal olefin group of the formula wherein R1 is a C1-C40 hydrocarbon that can be unsubstituted or substituted with a halogen, olefin, ether, ketone, or C4-C30 polyoxyalkylene functionality in which the alkylene groups contain 2 to 6 carbon atoms, R2 to R4 are each independently a hydrogen or a C1-C40 hydrocarbon that can be unsubstituted or substituted with a halogen, olefin, ether, ketone, or a C4-C30 polyoxyalkylene functionality in which the alkylene groups contain 2 to 6 carbon atoms, and optionally wherein any two of R1 to R4 together form a monocyclic, bicyclic, or tricyclic ring system optionally substituted with a heteroatom in each ring.

Abstract: A catalyst, co-catalyst, and/or chain transfer agent is added at a time after initiation of an addition polymerization reaction to produce a polymer product with a widened molecular weight distribution relative to having all of the components in the original reaction mixture. The catalyst, co-catalyst, or chain transfer agent may be added discretely or continuously to the reaction to produce a product with a bimodal, trimodal, or other broadened molecular weight distribution.

Abstract: The invention relates to polyacetal compositions comprising a mixture of (i) a polyacetal resin, (ii) p-aramid particles and (III) a vinyl-terminated dimethyl siloxane polymer. These compositions are useful in preparing molded articles exhibiting a good balance between high self-lubricating properties and wear resistance, and especially useful in articles that are in motion with respect to other parts they are in contact with.

Abstract: The invention provides a process for producing a recycled resin, which includes: a first step of decomposing a resin composition containing a thermosetting resin in a supercritical or subcritical solvent having a monomer constituting the thermosetting resin or a derivative thereof as an essential component and a second step of adding a polyfunctional compound thereto to process; a recycled resin or a processed and recovered matter obtained according to the process for producing; a recycled resin composition formed from a recycled resin and/or a processed and recovered matter of the resin composition; and a method for recycling a resin composition, which reuses said recycled resin and/or said processed and recovered matter of a resin composition as a raw material of a recycled resin composition.

Abstract: A multi-level tubular reactor operable to facilitate a chemical reaction in a reaction medium flowing therethrough. The tubular reactor can include a plurality of horizontally elongated and vertically spaced reactor segments coupled to and extending outwardly from a common header. One or more of the reactor segments can contain a tray that divides the internal volume of the reactor segment into upper and lower chambers. The reaction medium can flow away from the header in the upper chambers and back to the header in the lower chambers.

Abstract: Continuous processes for preparing polycarbonates having a weight average molecular weight Mw, of 15,000 to 200,000 g/mol, the processes comprising reacting a dihydroxydiarylalkane and phosgene in the presence of a catalyst in a phase boundary process comprising: continuously dispersing in a disperser an organic phase comprising at least a portion of the phosgene and a solvent suitable for the polycarbonate and an aqueous phase comprising the dihydroxydiarylalkane, water and an alkali solution present in an amount of 1.5 to 2.5 moles per mole of the dihydroxydiarylalkane, to form a mixture; reacting the mixture in a first reactor with a residence time of less than 0.5 seconds; further reacting the mixture in a second reactor with addition of further alkali solution and, optionally, a chain terminator; and effecting further condensation in a third reactor with addition of further alkali solution and, optionally, a chain terminator, in the presence of the catalyst.

Abstract: A polyoxadiazole polymer is synthesized by heating polyphosphoric acid to a temperature of at least about 160° C. and making a solution by mixing hydrazine sulfate salt with one or more dicarboxylic acids or their derivatives in the heated polyphosphoric acid. The solution is heated under an inert gas atmosphere and the polymer is precipitated in a basic solution. The polyoxadiazole polymer can be produced as a homopolymer or copolymer, and may be used to produce a membrane or fibers.

Abstract: Disclosed herein is a camera lens comprising a thermoplastic composition comprising a poly(aliphatic ester)-polycarbonate copolymer comprising soft block ester units derived from an alpha, omega C6-20 aliphatic dicarboxylic acid or derivative thereof, a dihydroxyaromatic compound, and a carbonate source, wherein the thermoplastic composition has a melt volume rate of 13 to 25 cc/10 min at 250° C. and under a load of 1.2 Kg and a dwell time of 6 minutes, according to ASTM D1238-04, and wherein the camera lens has an effective lens area of 0.5 to 100 mm2. A method of making the camera lens, and a camera lens comprising a thermoplastic composition comprising a redistribution product of a poly(aliphatic ester)-polycarbonate, are also disclosed.

Abstract: A poly(arylene ether) composition includes a hydrogenated block copolymer of an alkenyl aromatic compound and a conjugated diene, a flame retardant, and a poly(arylene ether)-polysiloxane block copolymer reaction product that itself includes a poly(arylene ether)-polysiloxane block copolymer. The composition is useful for forming extruded articles, including insulation for wire and cable. The poly(arylene ether)-polysiloxane block copolymer contributes improved flame retardancy and, in many cases, improved physical properties to the composition.

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: An object of the invention is to provide a method for easily producing granular carboxyl group-containing polymer particles, which have a high bulk density and readily swell in water. The invention provides a method for producing a granular carboxyl group-containing polymer particle by producing a carboxyl group-containing polymer particle, preparing an aggregate of the carboxyl group-containing polymer particles by providing the carboxyl group-containing particles with moisture so that the carboxyl group-containing polymer particles absorb the moisture in an amount of 5 to 25% by weight and form the aggregate, drying the aggregate of the carboxyl group-containing polymer particles, and then grinding the dried aggregate.

Abstract: The invention is directed to polyester processes where the esterification process at utilizes a vapor removing device, wherein the vapor removing device is substantially horizontally oriented, wherein the esterification effluent forms a two-phase laminar, stratified, non-circular vapor/liquid flow in at least a portion of said vapor removing device.

Abstract: A sloped tubular reactor operable to facilitate a chemical reaction in a reaction medium flowing therethrough. The reactor can include a downwardly sloped tubular member, a flow divider disposed in the tubular member, and one or more internal trays disposed in the tubular member. The flow divider divides flow of the reaction medium among the trays and the bottom of the tubular member.