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DuPont Mobility and Materials Vamac® HVG Ethylene Methacrylate (AEM)
Categories: Polymer; Thermoplastic; Ethylene Methyl Acrylate

Material Notes: Vamac® HVG is an unfilled high viscosity gum ethylene/acrylic elastomer similar to Vamac® G, but offering higher compound viscosity. The higher viscosity of compounds made with Vamac® HVG results in improved green strength and related processing advantages, such as:
  • Improved collapse resistance of extrudates
  • Enhanced preform dimensional stability
  • Improved moldability through elimination of trapped air

Compounds of Vamac® HVG are often selected for applications such as compression molded goods, highly plasticized compounds, and extruded tubing and hose.

Vamac® HVG contains a small amount of processing aid.

Vamac® HVG is a Vamac® G type polymer with a Mooney Viscosity of 26 compared to 16 for Vamac® G. The two polymers have similar compositions but the Vamac® HVG has a higher molecular weight. They have many common features, including:

  • Good heat resistance in air
  • Good oil and fluid resistance
  • Good low temperature properties
  • Compounded with similar ingredients
  • Cured with same cure package

The big advantage of Vamac® HVG over Vamac® G is that the compounds made from the Vamac® HVG have a higher viscosity. The viscosity of the Vamac® HVG compound can be double that of a Vamac® G compound. This can lead to better processing. Specifically, the potential for a collapsed hose is reduced for an extrusion process and the potential for trapped air in an injection molded compound is reduced.

Information provided by DuPont.

Available Properties
  • Density, ISO 1183
  • Volatiles, EN 1400 / EN 14350-2
  • Mooney Viscosity, ISO 289-1-2, ML 1+4
  • Mooney Viscosity, ISO 289-1-2, ML 1+4, Compound
  • Hardness, Shore A, ASTM D 2240
  • Tensile Stress at Strain, ISO 527-1/-2
  • Compression Set, ISO 815
  • Maximum Service Temperature, Air, DuPont proprietary test
  • Processing Temperature
  • Cure Time
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