Tioxide Group, Plc

Jonathan Banford

Paul F Dietz

William Brander

Compositions suitable for use as a camouflage material are based on vesiculated granules of polymer material which are substantially free of titanium dioxide but contain a light reflecting agent. The agent is an oxide, hydroxide or insoluble salt of magnesium or an insoluble mixed salt of calcium and magnesium and is present in an amount of at least 10 percent by weight of the polymeric material. Preferably the agent is dolomite. Paints containing the composition are useful as camouflage in snowy conditions and the aqueous paints are removable by scrubbing.

Polymer granules and compositions containing them

When it has been attempted to dry wet polymeric particles in hot air at up to 100.degree. C. it has tended to produce discoloration in the product, introduce aggregates into the product, reduce the dispersibility of the product and reduce the integrity of the surface of the particles. A process of drying has now been developed which comprises heating to an elevated temperature the wet particles in an atomsphere substantially free of oxygen gas so that substantially all of the moisture is removed from association with said particles and under such conditions of time and temperature that any substantial deterioration of said particles is minimized. Preferably the atmosphere is of nitrogen.

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Stockton on Tees, United Kingdom

Jonathan Banford