Additives: Bio-based polymer modifier provides FR, enhanced properties

Bill Hamilton of Jemini developer JJI Technologies (Painesville, OH) told PlasticsToday that although he can’t divulge the exact composition of Jemini 100, he can say it is 90%-plus bio-derived from naturally occurring substances. “While it is not a flame retardant itself, it does not add to the fuel load like other polymer modifiers, which are mineral based,” Hamilton explains.

While mineral-based flame retardants can impact physical properties, making compounds brittle in some instances, Jemini 100 is said to improve elongation, flex modulus, and impact resistance due to its plasticizing effect. The Jemini line was originally developed as a way to impart superior flexibility to non-halogen flame retarded polypropylene wire and cables, without compromising the flame rating or other key properties.

Hamilton says the modifiers have thus far been used in conjunction with polyethylene and polypropylene, with the liquid injected directly into the barrel, although JJI believes it could also be added at the feedthroat. Letdown ratios have ranged from 2-5%, depending on the application and desired result, whether it’s process improvement or enhanced magnesium hydroxide flame retardant performance.
 
Speaking to PlasticsToday in early November, Hamilton said Jemini 100 was at that time in the final stages of commercialization, with smaller lots available for developmental purposes and full-scale commercial ramp up anticipated within the month. At the time of the interview, Hamilton said several companies were using Jemini 100 in scale-up situations involving highly filled materials such as magnesium hydroxide.
 
JJI Technologies is working to develop environmentally friendly, flame retardant additives. In particular, it’s focusing on technologies that can replace halogen-containing materials, which are being legislated out of use globally. —[email protected]