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DuPont Dow Elastomers Offers Technical Papers At SAE World Congress And Exposition

DuPont Dow Elastomers will present three technical papers at the 2002 Society of Automotive Engineers World Congress and Exposition on Tuesday, March 5 in Detroit.

The first presentation discusses the challenges facing automotive sealing system engineers brought on by the pending tightening of evaporative emissions regulations. The paper presents data to help the engineer select the best gasket to meet more stringent emission and fuel system requirements.

A second paper looks at a new fluoroelastomer, Viton® VTX-8525, and compares it to Viton® GFLT and other fuel system sealing materials. A third paper introduces a new polymer for molded seals, Viton® VTX-8802, that is designed be highly resistant to base attack, and to provide better resistance to hydrocarbon fluids compared to currently available base-resistant elastomers.

The pioneer in fluoroelastomers, Viton® has helped establish new standards for high performance automotive seals for more than 40 years. Because Viton® fluoroelastomer is so effective against extremes of heat, chemicals, fuel mixtures and fuel additives, it has become an essential element in meeting strict emissions requirements. DuPont Dow has developed many types of Viton® to meet specific end-use and processing needs.

The technical papers are:

• "Choosing the Right Elastomer for Air Intake and Engine Oil System Gaskets." With more stringent environmental regulations governing the design of engine gaskets, the paper, by Theresa M. Dobel and Robert E. Fuller of DuPont Dow, provides data designed to help an engine-sealing engineer evaluate fluoroelastomer (FKM), hydrogenated nitrile rubber (HNBR) and vinyl methyl silicone elastomer (VMQ, silicone) materials in terms of their long-term sealing performance. The research shows that various FKM types -FKM-AL (Viton® AL) and FKM-GFLT (Viton® GFLT) provide the best overall balance of low temperature flexibility and permeation performance. The paper will be presented at 9 a.m. on March 5 in Room 02-43 at the Cobo Center.
• "A New Fluoroelastomer for Fuel Systems and Seals." The paper, by Ronald D. Stevens of DuPont Dow looks at a new low temperature fluoroelastomer, Viton® VTX-8525, which has excellent fuel resistance, and compares it to current GLFT and other fuel system sealing materials. The data shows that Viton® VTX-8525 has good resistance to blends of Fuel C and methanol while maintaining the ability to seal below -40°C in a static O-ring sealing test. The presentation will be in Room 02-43 at 9:30 a.m. at the Cobo Center.
• "A New Development In Base-Resistant Fluoroelastomers." The paper by John G. Bauerle and Phan L. Tang of DuPont Dow introduces a new polymer, Viton® VTX-8802, that provides improved resistance to hydrocarbon fluids and also exhibits excellent resistance to base attack. The new polymer is comprised of TFE and propylene, a small amount of a proprietary cure site monomer, and a proprietary incorporated cure system. It also provides excellent mixing characteristics on 2-roll mills and in internal mixers. The paper will be presented at 11:30 a.m. in Room 02-43 at the Cobo Center.

About DuPont Dow Elastomers

DuPont Dow Elastomers, a global supplier of specialty elastomers with global headquarters in Wilmington, Delaware, is a joint venture between the DuPont Company and The Dow Chemical Company, with more than US $1 billion in sales. The company is the industry leader in chloroelastomers, ethylene elastomers and fluorinated elastomers, serving the automotive, chemical, construction, general rubber and wire and cable industries.

News Release: DuPont Dow Elastomers Offers Technical Papers At SAE World Congress And Exposition

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