Alcan International Limited

Natalie G Mead

Stephen C Brown

Consuelo Espejo Rodriguez

Andrew John Dayer

Steve Brown

Ken Evans

Frederick H Taylor

Bauxite, particularly high alumina bauxite, and brucite are used as flame-retardants in non-aqueous organic polymer formulations particularly for electric insulation or sheathing or encapsulation, and also in bitumen. The formulations are suitable for shaping e.g. by casting, moulding or curing at temperatures of 150&deg; C. or 200&deg; C. Water resistance and other properties including cost of bauxite and brucite compare favourably with the conventional flame-retardant aluminium trihydrate.

Bauxite flame-retardant fillers for insulators or sheathing

Improved fire retardant fillers for plastics materials are described which consist of magnesium hydroxide particles of reduced average surface area. The particles are produced by contacting particles of magnesium hydroxide of a relatively high average surface area with an etching solution for a time sufficient to dissolve at least some of the particles and to leave particles of reduced average surface area.

Treatment of magnesium hydroxide and its use as plastics filler

Growing community of inventors

Hayes, United Kingdom

Natalie G Mead