Zinc-rich powders

A homogeneous zinc-rich powder composition consisting essentially of zinc powder, a curable epoxy resin powder, a curing agent and a flow modifier, prepared by a process comprising blending the zinc powder with the epoxy resin, curing agent and flow modifier in molten state until a homogeneous mixture is produced, the zinc being 75%-90% by weight of the total of zinc and epoxy resin, cooling the mixture to solid form and thereafter grinding the solid to a powder form.

A homogeneous zinc-rich powder composition consisting essentially of zinc powder, a curable epoxy resin powder, a curing agent and a flow modifier, prepared by a process comprising blending the zinc powder, epoxy resin powder, curing agent and flow modifier by any known conventional means, the zinc being 75%-90% by weight of the total of zinc and epoxy resin, then heating the preblended mixture to a temperature sufficient to melt the resin without curing it, while continuously blending the mixture until a homogeneous product is obtained, cooling the product to a solid form and thereafter grinding the solid to form a powder.

A homogeneous zinc-rich powder composition consisting essentially of zinc powder, a curable epoxy resin powder, a curing agent and a flow modifier, prepared by a process comprising heating the epoxy resin powder containing said curing agent and said flow modifier by any known conventional means to a temperature sufficient to melt the resin without curing it, and thereafter adding the zinc powder with continuous blending until a homogeneous product is obtained, the zinc being 75%-90% by weight of the total of zinc and epoxy resin, cooling the product to a solid form and thereafter grinding the solid to form a powder.