Free Newsletter
Register for our Free Newsletters
Newsletter
Zones
Advanced Composites
LeftNav
Aerospace
LeftNav
Amorphous Metal Structures
LeftNav
Analysis and Simulation
LeftNav
Asbestos and Substitutes
LeftNav
Associations, Research Organisations and Universities
LeftNav
Automation Equipment
LeftNav
Automotive
LeftNav
Biomaterials
LeftNav
Building Materials
LeftNav
Bulk Handling and Storage
LeftNav
CFCs and Substitutes
LeftNav
Company
LeftNav
Components
LeftNav
Consultancy
LeftNav
View All
Other Carouselweb publications
Carousel Web
Defense File
New Materials
Pro Health Zone
Pro Manufacturing Zone
Pro Security Zone
Web Lec
Pro Engineering Zone
 
 
 
News

Ethylene acrylic elastomer makes durable seals, cures fast in the press

Du Pont Engineering Polymers : 08 December, 2004  (New Product)
The newest addition to the DuPont Vamac ethylene acrylic elastomer family - Vamac DHC - cures up to 30 percent faster than existing no-post-cure grades while improving compression set and oil resistance.
The newest addition to the DuPont Vamac ethylene acrylic elastomer family - Vamac DHC - cures up to 30 percent faster than existing no-post-cure grades while improving compression set and oil resistance. Vamac DHC cures in the moulding press, eliminating the cost and delay of traditional oven curing.

'Vamac DHC was developed for customers who need to minimise cure times while keeping a good balance of oil resistance and heat ageing for seals and gasket applications,' said Doug King, market leader - Vamac for North America at DuPont Ethylene Copolymers. “Vamac DHC also exhibits excellent long-term retention of sealing force (ie low compressive-stress relaxation) and low-temperature flexibility. Adding a no-postcure offering to the broad Vamac portfolio provides a more comprehensive family of materials to meet a variety of requirements for different levels of compression set, temperature resistance and other key properties.'

Vamac DHC can meet demanding requirements in a wide range of seals, gaskets, hoses, tubes and other parts for automotive and other industrial uses. Potential automotive seal and gasket applications include powertrain, rocker cover and bonded piston seals. Potential hose and tube uses include components for oil coolant, power steering, coolant, crankcase ventilation and coverings for fuel hoses. O-rings, grommets and spark plug boots are additional application examples.

Vamac DHC is rated for continuous service up to 150C. For parts used in hotter environments, Vamac DP, can operate continuously up to 165C. Vamac DHC cures, in the press or at the die, with the aid of peroxides such as ???'-bis (tert-butylperoxy)-diisopropylbenzene (DBDB) or dicumyl peroxide (DCP). The material is well-suited for injection, transfer or compression moulding and for profile, tube or sheet extrusion.

Both Vamac DHC and DP are AEM dipolymers. Traditional Vamac grades, such as Vamac G, are AEM terpolymers. These products deliver even higher performance than the dipolymers but require post-cure.
Bookmark and Share
 
Home I Editor's Blog I News by Zone I News by Date I News by Category I Special Reports I Directory I Events I Advertise I Submit Your News I About Us I Guides
 
   Â© 2012 NewMaterials.com
Netgains Logo