DuPont Co. and Dow Chemical Co. are working to move two of their specialty polymers further into the concentrates market.
Officials with Wilmington, Del.-based DuPont said new opportunities are developing in concentrates for its Elvaloy AC-brand ethylene acrylate copolymers. At Midland, Mich.-based Dow, Engage-brand polyolefin elastomers are seeing similar conditions. Standard grades of both products can be used as carrier resins to improve the performance of a number of plastic parts.
Officials working with both products spoke at Thermoplastic Concentrates 2005, an industry conference held Feb. 9-11 in New Orleans and hosted by Applied Market Information LLC.
Elvaloy AC has been tested in concentrates based on polybutylene terephthalate, nylon 6/6, polypropylene and polycarbonate/ABS blends, according to marketing programs manager Hal Panabaker.
The material has provided better titanium dioxide dispersion in nylon 6/6 and PP, and better carbon black dispersion in PC/ABS, Panabaker said. Overall, Elvaloy AC has higher thermal stability and less property deterioration than competing materials, he added.
DuPont has been selling limited quantities of Elvaloy AC into the concentrates market since late 2003. The material is produced at a site in Belgium through a joint venture with European polyolefins maker Borealis A/S.
In the Engage polyolefin elastomer line, some octene-based grades are making inroads as carrier resins in concentrate blends with PP, low density polyethylene and ethyl vinyl acetate, according to Dow technology engineer Kyle Kummer.
To date, most of those concentrate applications have been in the PP field, Kummer said. In PP and other materials, Engage offers good processability, recyclability and reduced weight, in addition to being halogen-free. The material also has high filler acceptance and is compatible with most olefinic materials, he added.
Concentrates made with peroxide and foaming agents also can use Engage. From an aesthetic viewpoint, the material also can be blended with translucent, metallic, edge-glow or phosphorescent materials, Kummer said.
The Engage line has been part of the DuPont Dow Elastomers joint venture since 1996, but will return to Dow when that partnership is dissolved later this year. Kummer said marketing of Engage into the concentrates arena won't be affected by the DuPont-Dow split.