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AssigneeMartin Marietta Materials, Inc.
InventorsLemuel Granada, Jr., James Innes, David Smith, Mark Wajer
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The invention provides a submicron magnesium hydroxide particulate composition comprising a first distribution of magnesium hydroxide particles having a D50 of no more than about 0.30 μm, a D90 of no more than about 1.5 μm, and a BET surface area of at least about 35 m2/g, which can be used as a flame-retardant additive for synthetic polymers, optionally in combination with other flame-retardant additives such as nanoclays and larger-sized magnesium hydroxide particulate compositions. Polymeric resins comprising the submicron magnesium hydroxide particles and methods of manufacturing submicron magnesium hydroxide particles are also provided.
A magnesium hydroxide particulate composition, comprising a first distribution of magnesium hydroxide particles having a D50 of no more than about 0.30 μm, a D90 of no more than about 1.5 μm, and a BET surface area of at least about 35 m2/g.
A flame-retardant additive composition, comprising (a) a first distribution of magnesium hydroxide particles having a D50 of at least about 0.9 μm and a BET surface area of no more than about 30 m2/g;
A method of manufacturing a magnesium hydroxide particulate composition, comprising:
Dependencies are inferred from the claim text.