Huber Engineered Materials offers the wire and cable compounder ingredients for :

• Flame retardance
• Smoke suppression
• Electrical performance
• Physical property enhancement

The world’s most widely used flame retardant is alumina trihydrate (ATH) and Huber Engineered materials has a broad line of products to meet the needs of formulators.

Here’s how ATH works: At approximately 440°F (225°C), the  three water molecules in alumina trihydrate are released in an endothermic reaction. The released water molecules quench the surface of the surrounding materials, thus providing flame retardance and smoke suppression.

Because alumina trihydrate contains no halogens or heavy metals, it is more environmentally friendly than flame retardants based on antimony metal or chlorinated and brominated (halogenated) compounds.

Narrow the particle size distribution with 1 micron Micral 9400 and chemically treated analogs. A narrower particle size distribution means fewer large particles and lower surface area.

Huber’s Hymod® M-9400 SP imparts improved  mechanical properties, increased water resistance and improved processing. And Huber’s Hymod M-9402 is phenyl has a silane treated. Both have low electrolytes.

Increase compatibility with silicone rubber by using an ATH with Huber’s SP silane surface treatment. ATH treated with a reactive silane improves dispersion and increases mechanical properties. The hydrophilic end of the silane molecule is reacted to the ATH, thus reducing the silane’s water sensitivity. The other end is available to crosslink with the elastomer. Hymod M-632 SP and Hymod M-9400 SP impart improved mechanical properties, increased water resistance and improved processing. The average particle sizes are approximately 5, 2 and 1 micron, respectively, imparting excellent flame retardant efficiency.

Process at temperatures above 400°F (204°C) with Vertex ST or Zerogen® 50SP surface-treated magnesium hydroxide. Magnesium Hydroxide provides flame retardance similar to alumina trihydrate, but it dehydrates at 550°F (288°C). Like ATH, it contains no  halogens or heavy metals.

Vertex ST is a treated magnesium hydroxide that enables easy dispersion into elastomers. It does an excellent job
imparting flame retardance in thermoplastic polyolefins for single-ply roofing. Its untreated analog is Vertex 60. Zerogen 50SP is finer and more pure than Vertex ST and is used in wire and cable applications.

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