Abstract: A process comprises combining in a batchwise, semi-continuous, or continuous manner, or a combination thereof, in the presence of at least one free radical initiator, and at a temperature sufficient to cause the initiator to fragment to form free radicals, (a) at least one telogen selected from (1) fluoroalkyl halides that comprise at least one halomethylene moiety (—CHX—) and, optionally, at least one non-fluorine heteroatom, and (2) perfluoroalkyl halides that comprise at least one halofluoromethylene moiety (—CFX—) and at least one non-halogen heteroatom, the halides being selected from iodides and bromides; and (b) ethylene; the telogen and the ethylene being combined in total amounts such that the number of moles of ethylene per mole of telogen is at least about 4.

Abstract: This invention relates to single solvent polymer extraction methods.

Abstract: The present invention relates to processes for removing phosphorus from a fiber or yarn.

Abstract: A liquid crystal polymer represented by the following formula (I): wherein D represents a n-valence connecting group; n represents an integer of 3 to 20; L1 represents a single bond or a bivalent connecting group; P represents a polymer having at least one ester bond and/or amide bond and having a weight-average molecular weight of 1,000 or more; m represents an integer that satisfies the relation of n?m; R represents a hydrogen atom or a substituent; when a plurality of L1, a plurality of P, or a plurality of R are present in a molecule, they may be the same or different from each other; and P and P, or P and R may bond together.

Abstract: A polycarbonate copolymer contains: 0.1 to 50 mol % of a monomer unit represented by the following formula (1); and a monomer unit represented by the following formula (2). In the polycarbonate copolymer, the content of biphenols having a structure represented by the following formula (3) is 90 mass ppm or less. In the formula, R1 and R2 each independently represent a hydrogen atom, an aliphatic hydrocarbon group having 1 to 6 carbon atoms, an aryl group having 6 to 12 carbon atoms or a halogen atom. In the formula: R3 and R4 each independently represent a hydrogen atom, an aliphatic hydrocarbon group having 1 to 6 carbon atoms, an aryl group having 6 to 12 carbon atoms or a halogen atom; and X represents any one of bonding groups represented by —O—, —S—, —SO—, —SO2—, —CO— and 9,9-fluorenylidene group. In the formula, R1 and R2 each independently represent a hydrogen atom, an aliphatic hydrocarbon group having 1 to 6 carbon atoms, an aryl group having 6 to 12 carbon atoms or a halogen atom.

Abstract: A process for continuously producing a thermoplastic copolymer, in which a copolymer (A) containing unsaturated carboxylic acid alkyl ester units and unsaturated carboxylic acid units is produced and in succession heat-treated to perform intramolecular cyclization reaction by dehydration and/or dealcoholization reaction, for producing a thermoplastic copolymer (B) containing glutaric anhydride units and the unsaturated carboxylic acid alkyl ester units. The obtained copolymer is excellent in heat resistance and colorless transparency and very small in foreign matter content.

Abstract: To provide an aromatic polyester which is formed into a film having excellent heat resistance, color, mechanical properties, dimensional stability and gas barrier properties and a manufacturing process thereof; the aromatic polyester comprises a dicabroxylic acid component and a diol component, wherein (i) the dicarboxylic acid component contains 50 to 100 mol % of a recurring unit represented by the following formula (A): ?wherein R is an alkylene group having 2 to 10 carbon atoms, (ii) the aromatic polyester has an intrinsic viscosity measured at 35° C. by using a mixed solvent of P-chlorophenol and 1,1,2,2-tetrachloroethane (weight ratio of 40/60) of 0.4 to 3.0; (iii) the aromatic polyester has a content of a recurring unit represented by the following formula (D) of less than 10 mol %: —O—CH2CH2—O—CH2CH2—O—??(D) (iv) the aromatic polyester has a terminal carboxyl group concentration of 200 eq/ton or less; and (v) the aromatic polyester has an alkali metal content of 300 ppm or less.

Abstract: A method for drying a material such as a polymer hydrogel which passes through a cohesive phase as it dries is disclosed. The method comprises agitating a composition while removing liquid until the solids content of the composition reaches a level at which the composition enters a cohesive phase, halting agitation, removing liquid from the composition in the absence of agitation, and resuming agitation. Practice of the present invention can eliminate the problems associated with adhesion of a material to itself and to process equipment during the cohesive phase.

Abstract: A method of crystallizing a plurality of crystallizable polymer pellets includes a step in which the pellets are contacted with a temperature adjusting fluid in a crystallizer. The fluid adjusts the temperature of the pellets by having a temperature sufficient to allow at least partial crystallization of the plurality of polymeric pellets while maintaining the average pellet temperature of the plurality of pellets below the melting temperature of the pellets. A crystallizer implementing the methods of the invention is also provided.

Abstract: A reactor system operable to facilitate a chemical reaction in a reaction medium flowing therethrough. The reactor system includes a heat exchanger for heating the reaction medium and a disengagement vessel for disengaging vapor from the heated reaction medium.

Abstract: An electrical insulation system and method are disclosed which are based on poly(butylene terephthalate), wherein the poly(butylene terephthalate) contains a polymerized cyclic low molecular weight oligomeric poly(butylene terephthalate) resin. At least one filler material or a mixture of filler materials can be included. At least one hydrophobic compound or a mixture of hydrophobic compounds can also be included.

Abstract: The disclosure describes a reactor operable to facilitate a chemical reaction in a reaction medium flowing therethrough. The reactor can include a horizontally elongated reactor segment containing a horizontally elongated tubular member and a tray disposed within the tubular member. The reaction medium can flow through the reactor segment on the tray and on the bottom of the tubular member in generally opposite directions. The reactor also can include a header and multiple horizontally elongated reactor segments coupled to the header and spaced vertically apart from one another. The reactor can be used to produce polyesters.

Abstract: An objective of the present invention is to provide an inexpensive and excellent polyester resin sheet for photovoltaic batteries which enhances the electrical transduction efficiency of photovoltaic battery by improving the hydrolysis resistance and heat resistance, and further enhancing the screening potency, as well as a photovoltaic battery using the same. The polyester resin sheet for photovoltaic batteries comprises a polyester resin layer formed by using one or more layers having a number average molecular weight of 18500 to 40000 in which at least one or more layers having 5 to 40% by weight of titanium dioxide is formed on the polyester resin layer, wherein a light transmittance at wavelengths of 300 to 350 nm is 0.005 to 10%, a relative reflectance is 80% or more and 105% or less, an apparent density is 1.37 to 1.65 g/cm3, an optical density is 0.55 to 3.50, and the variation in optical density has a fluctuation of within 20% from the center value.

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: A process for producing non-solid-stated polyester polymer particles having one or more properties similar to polyester polymer particles that have undergone solid-state processing. In one embodiment, the process comprises (a) forming polyester polymer particles from a polyester polymer melt; (b) quenching at least a portion of the particles, (c) drying at least a portion of the particles, (d) crystallizing at least a portion of the particles, (e) annealing at least a portion of the particles. At all points during and between steps (b) through (e), the average bulk temperature of the particles is maintained above 165° C.

Abstract: A semi-crystalline, absorbable copolyester composition comprising the reaction product of a polycondensation polyester and at least one lactone, wherein the polycondensation polyester comprises the reaction product of diglycolic acid and/or a derivative thereof and diethylene glycol; and the copolyester comprises about 30 to 60% by weight of the polycondensation polyester based on the total weight of the copolyester. Also medical devices such as absorbable sutures comprising such copolyesters and absorbable microspheres comprising such copolyesters and methods of making of such absorbable microspheres.

Abstract: A sloped tubular reactor operable to facilitate a chemical reaction in a reaction medium flowing therethrough. The reactor can include a plurality of spaced apart internal trays disposed at different elevations in a downwardly sloping elongated tubular member.

Abstract: A process for producing terephthalic acid in a TPA facility, polyethylene terephthalate in a PET facility, and containers in a forming facility in which the distance between the TPA facility and the forming facility is less than about 10 miles. There is also described a process for transporting a wet mixture of TPA particles via a convey system to a PET facility. In contrast to traditional processing schemes, the processing steps can be located proximate to each other and can be integrated to eliminate certain intermediate processing steps such as, for example, purification, heating, cooling, and drying.

Abstract: Protective groups which may be cleaved with an activatable deprotecting reagent are employed to achieve a highly sensitive, high resolution, combinatorial synthesis of pattern arrays of diverse polymers. In preferred embodiments of the instant invention, the activatable deprotecting reagent is a photoacid generator and the protective groups are DMT for nucleic acids and tBOC for amino acids. This invention has a wide variety of applications and is particularly useful for the solid phase combinatorial synthesis of polymers.

Abstract: The present invention relates to a process for the continuous preparation of polycarbonates or diaryl carbonates by the method of the phase boundary process, in which both the mixing of the organic and aqueous phase and the upstream oligomerization step or aryl chloroformate and/or diaryl carbonate preparation step are effected in a special pump.