Hyperbranched polymeric PIN flame retardants
Hyberbranched polymeric phosphorus-based PIN flame retardants have been researched as an innovative fire safety solution for a range of polymers. The hyperbranched poly(phosphoesther)s (hbPPEs) are synthesised through a simple two-step process. The polymeric PIN FR hbPPE is effective in both the gas phase (inhibiting the flame) and condensed phase (forming a protective char on the polymer surface).
The polymeric hyperbranched structure enables compatibility with a range of plastics (here tested in polyester and epoxy resin), a high phosphorus content for improved fire protection effectiveness and an increased efficiency of the phosphorus content to char formation (probably resulting from release of phosphorus acids during hydrolysis).
“Hyperbranched poly(phosphoester)s as flame retardants for technical and high performance polymers”, K. Taüber et al., Polymer Chemistry 2014 DOI: 10.1039/c4py00830h http://pubs.rsc.org/en/content/articlelanding/2014/py/c4py00830h