Polyarylate resins

Bisphenol A. One mole of acetone condenses with two moles of phenol to form bisphenol A [80-05-07] which is used mainly in the production of polycarbonate and epoxy resins. Polycarbonates (qv) are high strength plastics used widely in automotive appHcations and appHances, multilayer containers, and housing appHcations. Epoxy resins (qv) are used in fiber-reinforced larninates, for encapsulating electronic components, and in advanced composites for aircraft—aerospace and automotive appHcations. Bisphenol A is also used for the production of corrosion- and chemical-resistant polyester resins, polysulfone resins, polyetherimide resins, and polyarylate resins. 

For a part to exhibit stmctural stiffness, flexural moduH should be above 2000 N/mm (290,000 psi). Notched l2od impact values should be deterrnined at different thicknesses. Some plastics exhibit different notch sensitivities. For example, PC, 3.2 mm thick, has a notched l2od impact of 800 J/m (15 fdbf/in.) which drops to 100 J/m (1.9 fflbf/in.) at 6.4-mm thickness. On the other hand, one bisphenol A phthalate-based polyarylate resin maintains a 250-J /m (4.7-fdbf/in.) notched l2od impact at both thicknesses. Toughness depends on the stmcture of the part under consideration as well as the plastic employed to make the part. Mechanical properties, like electrical properties, ate also subject to thermal and water-content changes. 

Most polyesters (qv) are based on phthalates. They are referred to as aromatic-aHphatic or aromatic according to the copolymerized diol. Thus poly(ethylene terephthalate) [25038-59-9] (PET), poly(butyelene terephthalate) [24968-12-5] (PBT), and related polymers are termed aromatic-aHphatic polyester resins, whereas poly(bisphenol A phthalate)s are called aromatic polyester resins or polyarylates PET and PBT resins are the largest volume aromatic-aHphatic products. Other aromatic-aHphatic polyesters (65) include Eastman Kodak s Kodar resin, which is a PET resin modified with isophthalate and dimethylolcyclohexane. Polyarylate resins are lower volume specialty resins for high temperature (HDT) end uses (see HeaT-RESISTANT POLYAffiRS). 

Both PET and PBT resin serve some of the same markets as other plastics. Nylon, unsaturated polyester fiber glass, phenoHc, PC, and polyarylate resins sometimes compete for the same molded part. 

Ardel polyarylate resins, 10 190 Ardeparin, 4 95t Arduengo carbenes, 26 847 Area, exponents of dimensions in absolute, gravitational, and engineering systems, Cross-sectional area Head- area meters Surface area Variable-area flowmeters Area detectors, 26 431 Area per surfactant molecule, 24 136 Arechloral hydrate, anesthetic properties of, 2 69... 

A convenient method of compositional designation uses molar percentages of ester and carbonate linkages coupled with the molar percentages of iso- and terephthalate units in the polymer. A 70% ester, 30% carbonate polyester carbonate with 60 parts of isophthalate and 40 parts of terephthalate is designated 70(60/40)30. Similarly, a standard PC resin is 0(0/0)100, and a polyarylate resin composed of a 1 1 molar ratio of iso- to terephthalate units esterfied with... 

Aromatic polyesters having an amorphous molecular structure. Compared with other amorphous engineering plastics in terms of heat resistance, polyarylates are generally positioned between polycarbonate on the low side and sulfone and polyether polymers on the high side. Compared with crystalline and semi-crystalline engineering plastics, polyarylate resins offer better resistance to warping, and generally comparable mechanical properties. 

Ardel . [Amoco] Polyarylate resin thermoplastic engineering polymer for inj., extrusion, and blow molding at high tenq>s. for electronics/elec., mech., lighting/optical, medical applies., household elec, goods. 

Durd . (Hoechst Ceianese/Engineering Plastics] Polyarylate resin engineering therW)plastic for glazing and lifting applies., lenses, automotive panels, appliance parts, solar collection panels. 

See Sodium dodecylbenzenesulfonate Arylene M40, Arylene M60, Arylene M75. See Dioctyl sodium sulfosuccinate Arylide yellow FGL. See Pigment yellow 97 Arylon LP 401 NC10, Arylon LP FR-402 NC10. See Polyarylate resin... 

Hazardous Decomp. Prods. Heated to decomp., emits acrid smoke and fumes NFPA Health 0, Flammability 1, Reactivity 0 Uses Plasticizer for PVC, PVB, PS, cellulosics chemical intermediate comonomer for polyarylate resins perfume fixative Manuf./Distrib. Aldrich http //www.sigma-aldrich.com] ChemService http //www.chemservice.com] Fluka http //www.sigma-aldrich. com] M orflex http //www.morflex.com] Unitex http //www. unitexchemical. com Trade Name Synonyms Bisomer DMIP (Standard) [Laporte Perf. Chems. http //www.laporteperform.com]] M orf lex 1129 [Morflex http //www.morflex.com]] Uniplex 270 [U n itex http //www. unitexchemical. com]... 

Durel 400] Durel P400, P410, P430. See Polyarylate resin... 

Polyarabinogalactan. See Arabinogalactan Polyarylate, amorphous. See Polyarylate resin Polyarylate, liquid crystalline... 

Uses Heat-resist, film for microwavable food pkg. inj. molded electronic/medical equip, components Polyarylate resin CAS 51706-10-6... 

Polyarylate resin blow molding, housings Styrene/butadiene polymer blow molding, medical devices Styrene/butadiene polymer blow molding, tech, parts Styrene/butadiene polymer blow molding, toys Styrene/butadiene polymer blow molding, tubes Styrene/butadiene polymer... 

Nickel sulfamate electronics components Polyarylate resin electronics industry Dihydroterpineol electronics ingredient Urethane di methacrylate electrophilic reagent... 

Polyarylate resin extrusion, housings Styrene/butadiene polymer... 

Polyarylate resin Polyarylether ketone resin Polyester carbonate resin Polyetherimide resin Polyethylene, chlorinated Polyethylene glycol Polyethylene, medium density Poly (p-methylstyrene) Poly (p-methylstyrene), rubber-modified Poly (oxy-1,2-ethanediyloxycarbonyl-2,6-naphthalenediylcarbonyl) resin Poly (oxy-p-phenylenesulfonyl-p-phenyleneoxy-p-phenyleneisopropylidene-p-phenylene) resin Poly (phenyleneterephthalamide) resin Polysulfone resin Poly (tetramethylene terephthalate) Polyvinylidene chloride Potassium sorbate Potato (Solanum tuberosum) starch Silica, colloidal Silicone Sodium N-alkylbenzenesulfonate Sodium bicarbonate Sodium tetraborate pentahydrate Starch, pregelatinized Styrene/acrylates copolymer Styrene/butadiene polymer Styrene/DVB copolymer , 1,1 -Sulfonylbis (4-chlorobenzene) polymer with 4,4 -(1-methylethylidene) bis (phenol) and 4,4 -sulfonylbis (phenol) Synthetic wax Tapioca starch Tetrafluoroethylene/perfluoro (propyl vinyl ether) copolymer Tocopherol Triglycidyl isocyanurate VA/crotonates copolymer Vinyl chloride/ethylene copolymer Wheat (Triticum vulgare) starch... 

Liquefied petroleum gas Polycarbonate lighting/optical components Polyarylate resin light-sensitive paper Copper nitrate (ic) lime composition modifier... 

Ethylene/tetrafluoroethylene copolymer mech. components Polyarylate resin mech. goods... 

Natural rubber Polycarbonate Polyetherimide resin Styrene/isoprene/styrene block copolymer medical components Oxygen Polyarylate resin medical devices... 

Polyarylate resins n. Often defined as copolyesters involving bisphenol-A and a mixture of terephthahc acid and iosphthahc acid, resulting in two distinct repeat units. 

Suppliers of polyarylate resins include Union Carbide Corporation (Ardel), Ticona (Duret), and RTP (glass reinforced grades). 

Polyarylate resins are heat-resistant thermoplastics with excellent toughness, uv stability, flexural recovery, dimensional stability, and electrical properties. 

Polyarylate resins exhibit good combustion resistance in terms of low flame spread, a high oxygen index, and low smoke generation. 

The properties similar to polycarbonates show polyarylate resins, synthesized usually by polycondensation process from terephthalic acid, isophthalic acid chloride, and BPA (Fig. 7.18). Polyarylates exhibit good impact strength, high deflection temperature, good chemical, thermal, weather and UV resistance as well as the dimensional stability higher than that of polycarbonates. Other important polymers with industrial significance, derived from BPA, are unsaturated polyesters (e.g., epoxyfuma-rate resins) [78], polyetherimides and polyether ether ketones (Fig. 7.18). 

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