Flame retardants, light on the halogens

Guo Polymer

Guo Polymer

As different classes of chemicals have different properties, the same should be expected in the area of environmental effects.  However, just because environmental effects are different, they may not in fact be better.  In addition to the patents on halogenated flame retardants, others patents have issued on non-halogenated flame retardant compositions and compositions in which halogens are lesser constituent.  A few recent examples show where the innovation is occurring:

  • United States Patent 7,847,032 entitled “Poly(arylene ether) composition and extruded articles derived therefrom” to Guo et al.
  • United States Patent 7,838,593 which teaches a rubber modified aromatic vinyl resin, a polyphenylene ether resin, and a cyclic phosphonate ester compound.
  • United States Patent 7,834,071 teaching a cyclic phosphorus compound flame retardant.