◆ SpookStack

POLYPROPYLENEBENZENE food container closures; chated and laminated prod- ucts; bottles (with PVC); printing plates: fibers for carpeis and upholsiery, cordage and bristles, stor age battery cases; crates for soft-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 lastics. polypropylenebenzene. See dodecylbenzene. polypropylene, chlorinated. White, odorless, nonflam- mable powder, A film-forming polymer used in coat ings, inks, adhesives and paper coatings. polypropyiene glycol ester. Exacily analogo ethylene glycol ester (q.v.). polypropylene glycol monobutyl ether. See butoxy Polypropylene glycol. polypropylene glycol (PG). HO(C;H.O)H. One of a group of compounds comparable to polyethylene lycols (q. but more oii-soiubie and substantiaiiy s water-soluble. Classified by approximate molec- ular weight, as 425, 1025, and Ss. Non-volatile, noncorrosive liquids; lower molecular weight mem- bers are soluble in water. Solvents for vegetable oils, waxes, resins. Combustible, low 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 (CsH.O). A derivative of propyl- ene used as intermediate for urethane foams. polypyrrolidone. Synonym for nylon-4, “Polyred.”"* Trademark for reaction products of ("Amine D” and ethylene oxide. Grades: Various grades which ‘of polyoxyethylene units ano free amine content. Vary in viscosity at 25°C from 6.5 to 24.8 poises. Uses: Corrosion inhibitors and detergents in petro- leum processing equipment: wetting and emulsifying agents; inhibiting hydrochloric acid. “Polyram.”? Trademark for a wetlable powder used fungicide and approved for many vegetables. Toxic by ingestion and inhalation. polysaccharide. A combination of nine or more mono- saccharides, finked together by glycosidic bonds. Examples: starch, cellulose, glycogen. See also carbohydrate; phycocolloid. polysiloxane. See siloxane. “Poly-Solv0™ Trademark for a series of glycol ether solvents for paints, varnishes, dry cleaning soaps, cutting oils, insecticides D2M. Diethylene glyco! theses. sorbate (USAN name for a polyoxyethylene fatty Polyse ester). One of = group of nonionic surfactants obtained by esterification of sorbitol (q.v.) with one or three molecules of a fatty acid (stearic, lauric, oleic, palmitic) under conditions which cause xplit- ting out of water from the sorbitol, leaving sorbitan. About 20 motes of ethylene oxide per mole of sorbi- methyl ether. Used as an- n for organo ic ayn~ tol are used in the condensation to effect water solu- bili Properties: r sily Lt; 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 (26) sorbitan monooleate}. Polysorbaie 65 (polyoxyethylene (20) sorbitan tristearate), Uses: Surfactant; emulsifying agent: dispersing agents; shortenings and baked goods; pharmaceuticals; fla- voring agents; foaming and defoaming agents. See also sorbitan fatty acid ester. {CHsCHCH:},. Po! rmoplastic synthetic resin i eight depending on degree of polymerization. Properties: Transparent, hard solid; high strength and impact resistance; excellent clectrical and thermal insulator. Attacked by hydrocarbon solvents but re- sists organic acids, alkalies, and alcohols. Not rec- ommended for ouidoos use, unmodified poi: flows when exposed to light, but light-stable modi fied 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 ABS; SAN). Nontoxic. Forms: Sheet. plates, rods, rigid foam, expandabic beads or spheres. Hazard: Combustible; autoignition semperature about 00°F. See also under foam. plastic. Uses: Refrigerator doors: ait conditioner casts, con- tainers and melded kousenold wares, machine hous- ings; electrical equipmest tors: packaging: clock and radio cabinets; phonograph records. (As foam), thermal insulation: tight construction as in boats, etc; ice buckets, water coolers; filiers in shipping containers; furniture construction. (As spheres): Radiator leak stopper. See also “Styron”; “Styrofoam.” “Polysulfide.”* Trademark for a mixture similar to sulfurated potash (g.v.), in which sodium replaces sufur. Yellow to yellow-green powder; sodium poly- sulfide content, 56% min; total sulfur, 50.7% min. Containers: 10-1 tins (6/case), 106-1b drums. Uses: Coloring copper and brass; stripping copper- plated deposits; purifying cyanide plating solutions. polysulfide elastomer. A synthetic polymer. in ether the solid or liquid form obtained by reaction of so- dium polysulfide with organic dichlorides such as di- chlorodiethy! formal, alone or mixed with ethylene dichloride. Outstanding for resistance to oils and solvents and for impermeability to gases. Poor ten- sile strength and abrasion resistance but are resil- jem 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 arts which cure at room tem- hesive compositions; binder in sol jants; gaskets, paint spray bose. See also “Thiokol.” id rocket propel- polysulfone. A synthetic thermoplastic polymer. Properties: Hard, 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