Ryton chemicals, resistance

Polyphenylene sulphide (PPS) (e.g. Ryton ) is a highly crystalline polymer with a melting point of 290 °C. It combines good mechanical properties with very high thermal and chemical resistance it is, moreover, self-extinguishing. It is, i.a., used as protective coating on metal surfaces. 

Moldings, composites, coatings oulstatiding in heat resistance, flame resistance, chemical resistance and electrical insulation resistance used for electrical components, mechanical parts, e.g., Ryton, Tedur, Fortron. 

Ryton Polyphenylene Sulfide is a new commercial plastic which is characterized by good thermal stability, retention of mechanical properties at elevated temperatures, excellent chemical resistance, a high level of mechanical properties, and an affinity for a variety of fillers. It is produced from sodium sulfide and dichlorobenzene. Its unusual combination of properties suggests applications in a variety of molded parts such as non-lubricated bearings, seals, pistons, impellers, pump vanes, and electronic components. Tough coatings of polyphenylene sulfide can be applied to metals or ceramics by a variety of techniques and are used as protective, corrosion-resistant coatings in the chemical and petroleum industries. Incorporation of small amounts of polytetrafluoroethylene provides excellent non-stick properties in both cookware and industrial applications. 

Foly(phenylene sulphide) (PPS). A partly crystalline thermoplastic with excellent chemical resistance and high thermal stability. Applications injection moulded technical articles, dispersions for metal coating. Trade name Ryton (USA.)... 

RYTON polyphenylene sulfide resins and compounds are engineering thermoplastics developed by Phillips Petroleum Company. Available in both molding and coating grades, these materials feature excellent dimensional stability, inherent flame retardancy, thermal stability, chemical resistance, desirable electrical properties and ease of processing. 

Poly(phenylene sulfide) has been commercial since 1973 (Ryton Phillips Petroleum Go.) and as a crystalline polymer offers excellent chemical resistance [99]. It also offers good flammability resistance and high temperature resistance and stability. The major deficiency is the poor toughness and commercial products are fiberglass reinforced to counteract this... 

The crystalline polymer, PPS (Ryton —Chevron Phillips Chemical Co., www.cpchem.com), has a high melting point (288 °C), outstanding chemical resistance, thermal stability, and fiammabifity resistance. It has no known solvents below 191—204 °C. The surface may be prepared as follows ... 

Figure 10.94 Stress vs. strain at several temperatures for Chevron Phillips Chemical Ryton R-7-120BL—65% glass fiber/mineral-filled, arc resistant PPS resin [9],...

TSM-325 Resistance of Ryton PPS to Hot Chlorinated Water, Chevron Phillips Chemical Company LP, The Woodlands, Tex., USA, March 2002. 

The Ryton polyphenylene sulphide compounds are formulated for the encapsulation of semiconductors and discrete components and are particularly suited to this application because of their excellent thermal stability, resistance to chemical environments, flame retardancy and good electrical properties over a wide temperature range. In order to be suitable for the encapsulation of microcircuits and transistors the material must have good flow during moulding, good dimensional stability, low levels of impurities and low moisture absorption characteristics. 

RYTON resin compounds are resistant to a very broad range of chemical materials and at elevated temperatures are considered second only to PTFE in overall resistance to corrosive and hostile chemical environments. Environments to which RYTON compounds do not have adequate resistance include oxidizing environments such as 50% nitric acid, 30% sulfuric acid, sodium hypochlorite, bromine water, etc., all at 200°F (93 C) or above. 

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