DuPont Performance Elastomers most recent product group, Vamac® Ultra - the latest in a family of ethylene acrylic elastomers (AEM) used successfully in demanding automotive applications, offers true step-change improvements in processability and performance - leading to longer functionality of parts.Order a Copy of the paper

A technical paper entitled "Vamac® Ultra - High Viscosity AEM Polymers with extended Application Possibilities", will be given at the International Rubber Conference 2009, Nuremberg on 29 June-2 July, by Klaus Kammerer, Technical Consultant - Vamac®, DuPont Performance Elastomers, and will be available upon request after the presentation.

Vamac® Ultra is already being specified for automotive turbo charger hoses for continuous temperatures as high as 175°C and for peak temperatues as high as 190°C. The latest AEM grades also offer high abrasion resistance in applications such as shaft and ball bearing seals.

Vamac® Ultra offers several key processing and end-use performance improvements over standard AEM polymers, including:

• Enhanced performance in injection molding processes with better compound flow, reduced mold fouling and increased mold cleaning intervals.
• Reduced blistering in compression molding.
• Better and faster dispersion of fillers and other compounding ingredients, especially in low hardness compounds or in formulations with high plasticizer levels.
• Excellent compression set properties.
• Improved dynamic fatigue resistance, stress-strain properties at high temperature, and retention of properties after heat aging.
• Better low temperature flexibility.
• Significantly better tensile and tear strength and elongation at break, plus sandpaper abrasion and resilience values.
• Improved ageing in dry heat and oil also results in better force retention in CSR tests in air at elevated temperature.