Clariant Masterbatches claims its new nonhalogen, flame-retardant masterbatches are alternatives to conventional materials containing chlorine or bromine.
The Cesa-flam masterbatches are designed specially for engineering plastics such as poly-amides, polyesters and thermoplastic polyurethanes. The Clariant additives masterbatch business based in Winchester, Va., said the new products are based on phosphorus compounds that promote polymer foaming, cross-linking and a surface char layer when exposed to fire. The char insulates the polymer from heat, reduces oxygen permeation, cuts down on dripping of the polymer and lowers smoke density and toxic emissions.
The company said its Cesa-flam line is high-temperature-stable, processes easily and takes color readily. Using flame-retardant additives in masterbatch form makes it easier to change dosages as each part requires, according to Clariant Masterbatches.
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