Chevron Phillips Chemical Introduces New PPS Grade
March 01 , 2006
THE WOODLANDS, TEXAS -- Chevron Phillips Chemical Company LP (Chevron Phillips Chemical) has expanded its Ryton polyphenylene sulfide (PPS) product portfolio by adding a new resin grade that provides superior hydrolytic stability over comparable glass and mineral fills. Ryton PPS R-7-220 is a 65 percent glass and mineral filled PPS compound developed for use in applications requiring constant or repeated exposure to high-temperature water and aggressive automotive fluids.
The superior hydrolytic stability of Ryton PPS R-7-220 results from the use of a proprietary fiberglass and other agents that enhance adhesion to the PPS polymer. The adhesion package is suited to withstand the high-processing temperatures of PPS, therefore minimizing the potential to generate gases, which coat molds and plug vents.
Additionally, Ryton PPS R-7-220 possesses other important mechanical properties. In a test with four competing resins, Ryton PPS R-7-220 outperformed all others by producing an ultimate tensile strength of 173 (MPa) and an ultimate flexural strength of 240 (MPa). The product boasts over 80 percent retention of these properties after 2000 hours of exposure to 140 C automotive long-life coolant.
"When we developed Ryton PPS R-7-220 we were looking to utilize the proven adhesion technology found in our highly successful R-4-220 to improve upon an existing glass and mineral filled grade," said Robert Goodman, Ryton PPS Product Manager. "Ryton PPS R-7-220 was specially formulated to address the stringent challenges the automotive fluid-resistant marketplace now requires."
Other beneficial properties inherent in Ryton PPS include excellent dimensional stability and good electrical properties. The resin's precision moldability and long-term dimensional integrity make RytonŽ PPS an excellent fit for molding complex parts in tight tolerances with low warpage. Additionally, RytonŽ PPS R-7-220 meets all the 200/220 C UL RTI and UL 94 V-O requirements characteristic of Chevron Phillips Chemical's RytonŽ PPS product line.
Applications for Ryton PPS R-7-220 range from systems for automotive cooling to hot water heating.
Ryton PPS is produced worldwide by Chevron Phillips Chemical Company LLC and its affiliates.
About Chevron Phillips Chemical
Chevron Phillips Chemical Company LLC with its affiliates is one of the world's top producers of olefins and polyolefins and a leading supplier of aromatics, alpha olefins, styrenics, specialty chemicals, piping and proprietary plastics. The company has total assets of approximately $7 billion and is owned equally by Chevron Corporation and ConocoPhillips.
