The emergence of the hybrid vehicle has provided a major impetus to the adoption of halogen-free flame retardant (HFFR) polyolefin compounds in automotive wire and cable according to coupling agent supplier Addivant (Middlebury, CT). "We have been very successful in penetrating the automotive market in Japan and we are now expanding [our efforts] on a global basis," notes Serge Rogasik, Vice President, General Manager, Global Performance Materials at Addivant.
As part of this initiative, Addivant introduced two new grafted polyolefin coupling agents at the recent Chinaplas show in Shanghai delivering, among other attributes, improved tensile strength and elongation at break in polyolefin compounds employing magnesium hydroxide (Mg(OH)2) or alumina trihydrate (ATH) HFFRs. Polybond 3249 and Polybond 3349 coupling agents reportedly allow wire and cable compounders to focus on physical property optimization while achieving excellent flame retardant dispersion and melt flow stability. Applications include building wire, communications cable and automotive wire and cable applications. Both new grades offer compounders a choice of performance and, depending on their final design requirements, the option to select the Polybond grade that delivers the most synergy in their system. Polybond 3249 and Polybond 3349 coupling agents are also reportedly optimized to offer superior physical property retention and melt flow stability.
Further, the increased use of fiber reinforced plastics in the auto sector is further stimulating demand for coupling agents and here too, Addivant has debuted a new product. Polybond 7200 coupling agent is specifically designed to deliver optimum dispersion and physical properties in natural fiber-reinforced polyolefin applications such as injection-molded automotive parts, offering polyolefin processers the highest level of performance in adhesion and filler coupling. Recent customer trials have reportedly confirmed the effectiveness of this coupling agent.