Ryton®

Ryton fibers are high performance products developed by Phillips Petroleum Co. by reaction of -dichloroben2ene with sodium sulfide in the presence of a polar solvent according to the following ... 

Properties. As prepared, the polymer is not soluble in any known solvents below 200°C and has limited solubiUty in selected aromatics, halogenated aromatics, and heterocycHc Hquids above this temperature. The properties of Ryton staple fibers are in the range of most textile fibers and not in the range of the high tenacity or high modulus fibers such as the aramids. The density of the fiber is 1.37 g/cm which is about the same as polyester. However, its melting temperature of 285°C is intermediate between most common melt spun fibers (230—260°C) and Vectran thermotropic fiber (330°C). PPS fibers have a 7 of 83°C and a crystallinity of about 60%. 

Fig. 6. Flexural strength vs temperature for Ryton PPS R-4 02XT. To convert MPa to psi, multiply by 145.

Electrical property Ryton PPS R-4XT, 40% glass-fiUed Ryton PPS R-7, glas s—rnineral-filled... 

Information on health and safety considerations cited herein for Ryton PPS powders and pellets can be found in Reference 157. Ryton PPS [26125-40-6] is listed in the Toxic Substance Control Act (TSCA) Inventory of Chemicals. 

RYTON Polypheny lenesulfide Physical, Chemical, Thermal, and Electrical Properties, TSM-266, Phillips Chemical Co., BaiflesviUe, OHa., Api. 1981, p. 2. 

The first commercial grades were introduced by Phillips Petroleum in 1968 under the trade name Ryton. These were of two types, a thermoplastic branched polymer of very high viscosity which was processed by PTFE-type processes and an initially linear polymer which could be processed by compression moulding, including laminating with glass fibre, and which was subsequently oxidatively cross-linked. 

Newer fabrics, not in common use but in development, test, and field trials, are described for higher temperature applications by Reference [50]. Application to 400°F—2100°F are potentially available using ceramic fibers Nextel 312 , laminated membrane of expanded PTFE on a substrate, polyimid fiber P-84, Ryton polyphenylene sulfide, and woven fiberglass. The heat and acid resistance of these new materials... 

At the request of an international petroleum company, a major manufacturer and supplier of down-hole equipment performed tests of the various elastomers commonly used in the construction of packers and other oil field tools. Seven of the nine most commonly used thermoplastic materials were found to be completely inert to TKPP solutions. The test included continual immersion in saturated TKPP for 21 days at 280°F. Only two elastomers, Vi-ton and Fluorel, showed any adverse reaction. O-rings made from these two elastomers showed minor cracking at the termination of the test. A listing of the elastomers that tested inert to TKPP solutions include nitrile, saturated nitrile (HNBR), Aflas, Kalrez, PEEK, Glass-filled Teflon, and Ryton. Several of these elastomers are attacked or degraded by conventional clear completion fluids containing calcium and zinc halides. The inertness of commonly employed elastomers to TKPP is an important advantage for TKPP fluids in normal operations. 

Method of gasketing flat gaskets vinylidene-difluoride, ethylenechloro-trifluoroethylene (ECTFE), Halar, Ryton PPS O-rings ... 

Crastone, Fortron, Primef, Ryton, Supec, Tedur, XTel. 

Poly(phenylene sulfide) (PPS Ryton) is a solvent-resistant plastic that is useful in high-temperature service (structure 4.71). PPS is used for pumps, sleeve bearing, cookware, quartz halogen lamp parts, and electrical appliance housings. 

Ryton Poly(phenylene sulfide) Phillips Petroleum... 

A variety of natural and synthetic materials are used throughout fuel and lubricant systems. Examples include transfer lines, hoses, fan blades, impellers, small gears, housings, and a host of supporting framework. Some plastics can be degraded by fuels, lubricants, additives, and various petroleum-based compounds. The most resistant material is polytetrafluoroethylene (PTFE). Ryton and Viton are less resistant, but are still quite stable in fuel and lubricant systems. Characteristics of PTFE and Ryton are shown below ... 

Rotary Actuator A device for converting hydraulic energy into rotary motion. Ryton A polyphenylene sulfide elastomer. 

Unlike the corresponding PPO, PPS is resistant to organic solvents. PPS is sold under the trade name of Ryton. Its general properties are shown in Table 15.10. 

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