Custom Resins

Utilizing electrolytic recovery, customized resins, selective membranes, and adsorbents to separate metal impurities from plating baths, acid/caustic dips, and solvent cleaning operations. 

Primary metals manufacturing operations have experienced source reduction and recycle/reuse benefits similar to those available to metal finishing operations, including conserving waters through countercurrent rinsing techniques, and utilizing electrolytic recovery, customized resins, selective membranes, and adsorbents to separate metal impurities from acid/caustic dips and rinsewaters to thereby allow for recycle and reuse. 

Another early solid-phase synthesis focused on preparing l,4-benzodiazepine-2, 5-diones, a structure common to many different classes of drugs.20 The route started with preparation of a custom resin-linker (9.61) (Scheme 9.10). The resulting resin was divided into 10 equal portions. Each portion was mixed with a different a-amino acid in the presence of NaBH(OAc)3 to form amine 9.62 (Scheme 9.11). Each of the 10 different batches of amine 9.62 was in turn evenly divided into 12 portions for a new total of 120 individual batches of resin. Each batch was loaded into a tube with a fritted bottom. The... 

CUSTOMER RESIN PROPERTIES GLOSS HEAT STABILITY... 

Adsorption is based on the principle of the differential affinity of dissolved solutes in a mobile liquid phase to a stationary solid phase. Adsorption columns usually have a smaller capacity but higher specificity than extraction. Various adsorbents have been in use, including activated charcoal (usually from vegetable sources), and more recently, customized resins that can have either positive or negative charges on them, or... 

A2P is known to bind IgG especially well when isolated from blood plasma. Different products under the label MAbsorbent have been developed, for example, in cooperation with GlaxoSmithKline, Boerhringer Ingelheim, and Abbott for the capture of monoclonal antibodies and antibody fragments (FAB). With the cooperation of Prometic and Octapharma the P-CAPT Prion capture resin for plasma-derived injectible drugs was developed. Prometic states on its website that one of its customized resins is used in 8001 scale in a column of 1.8 m diameter. 

AlliedSignal, Morristown, New Jersey BASF, Mt. Olive, New Jersey Bayer, Pittsburgh, Pennsylvania Custom Resins, Henderson, Kentucky DuPont, Wilmington, Delaware Nylatech, Manchester, New Hampshire... 

Allied Signal Ashley Polymers BASF Bamberger Polymers Bayer Corp. Custom Resins DSM EMS Ferro M.A. Hanna ig. Network Polymers Nyltech Polymers IntL ... 

Norpex, PPO-based engineering thermoplastics. Custom Resins Group Norsfl, Two-component siUcones, Insulcast Noryl, Polyphenylene oxide-based resin, GE Plastics... 

Nylamid, Nylon-based engineering thermoplastics, Custom Resins Group... 

Eastman Chemical Custom Resins DSM Chemicals EMS-Chemie... 

Acetal resins are typically suppHed in 25-kg multiwall bags and 500-kg Gaylords (rigid containers). Precompounded custom colors are available from manufacturers or the customer may use color concentrates. 

Melt Viscosity. Viscosities of resins at standard temperatures yield information about molecular weight and molecular weight distribution, as weU as valuable information with respect to appHcation logistics. Some customers prefer to receive resins in molten form. Melt viscosities help to determine the required temperature for a resin to be pumpable. Temperature—viscosity profiles are routinely suppHed to customers by resin manufacturers. In general, a molten viscosity of 1—1.1 Pa-s (1000—1100 cP) or less at process temperatures is convenient for the pumping and handling of molten resin. 

Ionomer resins are produced in multiple grades to meet market needs, and prospective customers are provided with information on key processing parameters such as melt-flow index. Nominal values for many other properties are Hsted in product brochures. The ASTM test methods developed for general-purpose thermoplastic resins are appHcable to ionomers. No special methods have been introduced specifically for the ionomers. 

Viscoelastic Measurement. A number of methods measure the various quantities that describe viscoelastic behavior. Some requite expensive commercial rheometers, others depend on custom-made research instmments, and a few requite only simple devices. Even quaHtative observations can be useful in the case of polymer melts, paints, and resins, where elasticity may indicate an inferior batch or unusable formulation. Eor example, the extmsion sweU of a material from a syringe can be observed with a microscope. The Weissenberg effect is seen in the separation of a cone and plate during viscosity measurements or the climbing of a resin up the stirrer shaft during polymerization or mixing. 

Some other bearing materials find extensive use for which production volume is less well defined. EiHed plastics such as nylon, acetal resin, PTEE, and phenoHcs are formed and molded into bearings in a wide variety of mechanical stmctures. Tin, lead, and bronze alloys are used for oil-film bearings in heavy industrial and power generating equipment, frequently in custom bearings manufactured directly as machine components. 

Beat-Cured Restm. For optimum comfort and to impede further loss of chewing efficiency, close adaptation of the denture base to contiguous oral tissues is required, which necessitates custom-made appHances. Nearly all dentures are made of acryHc resins. A wax pattern is used to form a custom denture base in which the denture teeth are embedded. A plaster or dental-stone investment spHt mold of this wax denture base and teeth is prepared. The wax portion is removed and the surface of the resulting mold cavity is painted with a separating medium, usually an aqueous solution of alginate, to aid in the removal of the cured acryHc from the plaster mold. 

Adhesion depends on a number of factors. Good adhesion is defined by most customers as substrate failure. The major adhesive manufacturers possess equipment that allows them to make bonds with customer substrates under conditions that closely simulate actual packaging lines. These bonds are peeled either automatically or by hand to gauge adhesion. The most important factors influencing adhesion are the wet-out of the substrate, partieularly by the polymer component of the adhesive system, and the specific adhesion with the substrate. Choice of resin is critical for both. Rosin, rosin esters and terpene phenolics are eommonly added for these purposes in EVA and EnBA-based systems. Adhesion at low temperatures is also influenced by the overall toughness of the system at the test temperature. 

Sometimes, new values are added not only to the polymer itself, but also to the shape or physical state of the processed polymers to maximize the profit opportunity. For example, when a company develops a novel polymeric material and its manufacturing technology, the company may prefer to make their novel polymers available to customers in the form of intermediate consumer products, such as hi performance films or fibers, rather than manufacturing and selling bulk resins to industrial customers. To do so, the company should have a line of technical capabilities from polymer synthesis to consumer product manufacturing. 

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