Union Carbide Chemicals & Plastics Technology Corporation

Dow Global Technolgoies LLC

Paul D Whaley

Jeffrey Morris Cogen

Ashish Batra

John Klier

Geoffrey David Brown

Jinder Jow

Thomas S Lin

Shana P Bunker

Yimsan Gau

Manuel F Alsina

Use of a bimodal filler system allows masterbatches with higher filler levels to be processable. When used with moisture curable resins, the use of a masterbatch having a bimodal filler allows the preparation of a composition having a higher percentage of moisture curable resin than if a unimodal filler was used and also provides enhanced flame retardant properties.

Bimodal filler systems for enhanced flame retardancy

Magnesium oxide (MgO) compounded into a polymer can subsequently be hydrated in-situ within the polymer to form magnesium hydroxide. In the case of silane-based or peroxide-based crosslinkable resins, the MgO hydration and polymer crosslinking can be done in a single process step, or in sequential steps. In the case of non-crosslinkable compounds, hydration can be carried out after compounding (no crosslinking step). In all cases, steam CV, sauna, or hot water bath are options for hydration. This approach enables preparation of polymer compounds that are flame retarded with metal hydrates yet free of the traditional limitations posed by shelf instability, extrusion scorch, undesired dehydration, and processing temperature limitations posed by metal hydrates.

Magnesium hydroxide-based flame retardant compositions made via in-situ hydration of polymer compounds comprising magnesium oxide

Halogen-free, flame-retardant, crack-resistant, cable coatings are prepared from a composition comprising:

Crack-resistant, flame retardant, halogen-free, cable assembly and coating composition

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Hillsborough, NJ, United States of America

Paul D Whaley