Alumina hydrate particles, flame retardant, resin composition and electric wire/cable
AssigneeKonoshima Chemical Co., Ltd.
InventorSeiji Matsui
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Abstract
The present invention provides alumina hydrate particles, a flame retardant and a resin composition that are each for an electric wire/cable covering material improvable in flame retardancy and mechanical properties while the covering material keeps acid resistance; such an electric wire/cable; and producing methods thereof. The alumina hydrate particles of the present invention for electric wire/cable covering material have an average particle size of 0.5 to 2.5 μm, and having a primary particle variation R of 24% or less, the variation R being represented by the following expression: primary particle variation R (%)=“standard deviationσ(μm) of major axis diameters of the primary particles”/“average value(μm) of the major axis diameters of the primary particles”×100.
Claims7
Alumina hydrate particles for electric wire/cable covering material, having an average particle size of 0.5 to 2.5 μm, having a BET specific surface area of 2.5 to 10 m2/g, and having a primary particle variation R of 24% or less, the variation R being represented by the following expression:
- primary particle variation R (%)=“standard deviation σ(μm) of major axis diameters of the primary particles”/“average value (μm) of the major axis diameters of the primary particles”×100.
A flame retardant for electric wire/cable covering material that comprises alumina hydrate particles surface-treated with a surface treating agent,
- wherein the surface-treated alumina hydrate particles have an average particle size of 0.5 to 2.5 μm, have a BET specific surface area of 2.5 to 10 m2/g, and have a primary particle variation R of 24% or less, the variation R being represented by the following expression:
- primary particle variation R (%)=“standard deviation σ(μm) of major axis diameters of the primary particles”/“average value (μm) of the major axis diameters of the primary particles”×100.
Dependencies are inferred from the claim text.