Powder mixture for making an undercoating agent for steel surfaces
AssigneeSika Chemie GmbH
InventorsGuido Wekenmann, deceased, Siglinde Herzog nee Kress, Axel Petrikat
Life of this patent
Estimating the term…
Abstract
The invention concerns a zinc-containing corrosion-protecting undercoating agent for steel surfaces. The undercoating agent, which contains no organic solvents, consists of a mixture of dry, water-emulsifiable dispersion agent in powder form and water-reactive zinc in powder or flake form which are mixed with water immediately before treatment. The corrosion-protection properties of undercoating agents prepared in this way are as good as those of prior art single-component zinc-dust undercoating agents using only organic solvents.
Claims9
A powder mixture for making an anticorrosive zinc-containing undercoating agent for steel surfaces, comprising a dry mixture of a water-reemulsifiable powdery dispersion agent and a water-reactive zinc in powder or flake form said dispersion agent being selected from the group consisting of a vinyl acetate copolymer, an acrylate, an ethylene-vinyl laurate-vinyl chloride copolymer and a styrene copolymer.
Dependencies are inferred from the claim text.