Flame retardant insulation compositions having improved high...

C - Chemistry – Metallurgy – 09 – K

Patent

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C09K 21/10 (2006.01) C09K 21/14 (2006.01) H01B 3/30 (2006.01) H01B 7/295 (2006.01)

Patent

CA 2388393

Flame retardant compositions useful as insulation for 150 ~C-rated wire and cable applications are provided. The compositions of the invention utilize an ethylene-alkyl acrylate copolymer base resin with a two-component stabilizer package consisting of a zinc salt of a mercaptobenzimidazole and an aromatic secondary amine compoud. Also, included to achieve the requisite flame retardance, crosslinkability and physical properties are a brominated flame retardant, antimony trioxide, a hydrated inorganic filler and a chemical crosslinking agent.

Compositions retardatrices de flamme utilisées en tant qu'isolant pour des fils et câbles dont la température nominale de 150 ·C. Les compositions selon la présente invention sont constituées d'une résine à base de copolymère éthylène-alkyle et d'un système stabilisateur à deux constituants, contenant un sel de zinc de mercaptobenzimidazole et un composé d'amine secondaire aromatique. Un agent retardateur de flamme bromé, du trioxyde d'antimoine, une charge organique hydratée et un agent de réticulation chimique sont également ajoutés à ladite composition, ce qui permet d'obtenir les propriétés retardatrices de flamme, de réticulation et physiques requises.

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