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POLYPROPYLENEBENZENE polysorbate (USAN name for a food container closures, cbated and laminated prod- ucts; bottles (with PVC); printing plates; fibers for carpets and uphoisiery. cordage and bristles, sior- age battery cases, crates for sofi-drink bottles, labo- ratory ware; loys; synthetic seaweed to encourage silt deposition, radiator grills, trays and containers for Storing precision equipment; artificial] grass and turfs, plastic pipe, wearing appare! (acid-dyed), fish nets, Surgical casts; strapping; synthetic paper; reinforced | piastics. polypropylenebenzene. See dodecylbenzene. polypropyfene, chlorinated. White, odorless, nonflam- mable powder, A film-forming polymer used in coat- ings, inks, adhesives and paper coatings. Giypropyiene glycol ester. Exactly ethylene glycol ester (q.v.). Sao ROUS 16 polypropylene giycol monobutyl ether. See butoxy polypropytene glycol. polypropylene glycol (PG). HO(C)H,O)H. One of a group ef compounds comparable to polyethylene plycols (q.v.}, but more oili-solubie and substantially s water-soluble. Classified by approximate molec- ular weight, as 425, 1025, and 2025. Non-volatile, honcorrosive liquids, lower molecular weight mem- bers are soluble in water. Solvents for vegetable oils, waxes, resins. Combustible; fow toxicity. Uses: Hydraulic fluids; rubber lubricants; antifoam agents; intermediates in urcthane foams, adhesives, coatings, elastomers; plasticizers; paint formulations; laboratory reagent. polypropyleneimine. Polymeric form of propyleneim- ine (q.v.}. Available in $0 aqueous solution. Uses: Textile paper, and rubber industries. polypropylene oxide (C;H.O},. A derivative of propyl- ene used as intermediate for urethane foams. polypyrrolidone. Synonym for nylon-4. “Polyrad.”°" Trademark for reaction products of “Amine D” and ethylene oxide. fienAees =, © ren : i Pf 3 Grades: Various grades which differ in chain length of polyoxyethylene units ana free amine content. Vary in viscosity at 25°C from 0.5 to 24.8 poises. Uses: Corrosion inhibitors and detergents in petro- leum processing equipment, wetting and emulsifying agents; inhibiting hydrochlonc acid. len ath “Polyram.”” Trademark for a wettable powder used as a fungicide and approved for many vegetables. Toxic by ingestion and inhalation. polysaccharide. A combination of nine or more mono- saccharides, Linked together by glycosidic bonds. Examples: starch, cellulose, glycogen. See also carbohydrate; phycocolloid. polysilozane. See siloxane. “Poly-Solv."“ Trademark for a series of glycol ether solvents for paints, varnishes, dry cleaning soaps, cutting oils, insecticides. D2M. Diethylene glycol dimethyl ether. Used as an- hedrowe reaction medium for organometallic ayn- epurSuS Fee fleet ears lyoxyethylene fatty acid ester). One of a group of nonionic surfactants oblained by esterification of sorbitol (q.v.) with one or three molecules of a fatty acid (stearic, lauric, oleic, palmitic) under conditions which cause split- ting out of water from the sorbitol, leaving sorbitan. About 20 moles of ethylene oxide per mole of sorbi- 4. és . . % rat Bee = 2b pe Baek Th ee e ae & "t Tay - ; bs ui = al 704 mnluctosenae Sf Lf LCE. Pyen eee (wg a5 a en me tol are used in the condensation to effect water solu- bility. ; Properties: Lemon to amber oily liquids, sp. gr. about i.t; faint odor and bitter taste: most types are sol- uble in water, alcohol, and ethyl acetate. Combus- tible; nontoxic. Grades: Polysorbate 20 (polyoxyethylene (20) sorbitan monolaurate}, Polysorbate 60 {polyoxyethylene (20) sorbitan monostearate). Polysorbate 80 (polyoxy- ethyiene (20) sorbitan monooicate}. Polysorbaic 05 (polyoxyethylene (20) sorbitan tristearate), Uses: Surfactant; emuisifying agent: dispersing agents: shortenings and baked goods; pharmaceuticals; fla- voring agents; foaming and defcaming agents. See also sorbitan fatty acid ester. Balimerized cturene fav.) roymerzce styrene (4.4.7, a thermoplastic synthetic resin of variable molecular weight depending on degree of polymerization. Properties: Transparent, hard solid; high strength and impact resistance; excellent electrical and thermal insulator. Attacked by hydrocarbon solvents but re- sists organic acids, alkalies, and alcohols. Not rec- ommended for outdoor use, unmodified polymer llows when exposed to light, but light-stable modi- ied grades are available. Easily colored, molded and fabricated. Copolymerization with butadiene and acrylonitrile and blending with rubber or glass fiber increase impact strength and heat resistance. (See ARS; SAN). Nontoxic. Forms: Sheet, plates, rods, rigid foam, expandabie beads or spheres. Hazard: Combustible; autoignition temperaiure about 800° F. See also under foam. plastic. Uses: Refrigerator doors: air conditioner cases, con- tainers and melded household wares, machine hous- ings: electrical equipmes= rows: packaging: clock and radio cabinets; phonograph records. (As foam): therma! insulation, fight construction as in boats, etc.; ice buckets, water coolers; fillers in shipping containers, fumiture construction. (As spheres): Radiator leak stopper. See also “Styron”; “Styrofoam.” “Polysulfide.”** Trademark for a mixture similar to _ polysulfide elastomer. A synthetic polysulfone. A suifurated potash (q.v.), in which sodium replaces sufur. Yellow to yellow-green powder; sodium poly- sulfide content, 56% min; total sulfur, 50.7% min. Containers: 16-1b tins (6/case); 106-1b drums. Uses: Coloring copper and brass, stripping copper- plated deposits; purifying cyanide plating solutions, lymer in either solid or liquid form obtained by the reaction of s0- dium polysulfide with organic dichlorides such as di- chlorodiethy! formal, alone or mixed with ethylene dichloride, Outstanding for resistance to oils znd solvents and for impermeability to gases. Poor ten- sile strength and abrasion resistance but are resil- jemt and have excellent low-temperature flexibility. Some grades have fairly strong odor, which is not objectionable in most applications. Sealant grades are furnished in two parts which cure at room tem- ture when bl Uses: Gasoline and oil-loading hose; sealants and ad- hiesive compositions; binder in solid rocket propel- lants, gaskets, paint spray bose. “Thiokol.” synthetic thermoplastic polymer. ; Properties: Hard, rigid transparent solid; tensile strength 10,000 psi; sp. gr. 1.24, flexural strength 15,000 psi, good electrical resistance, minimum creep: low expansion coefficient. Soluble in aromatic ‘ ae zm oP eh a 3 eee saree pre ee $ Ae Ea S ree th ete,