Rust resistant latex paint primer for metal surfaces
AssigneeN L Industries, Inc.
InventorsPaul Krevenas, David Graeme Milne
Life of this patent
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Abstract
A latex paint composition has been prepared which contains in addition to its paint composition from 5 to 15% of a basic zinc phosphite composition and from 2 to 10% of a natural drying oil. This new latex paint composition is useful for preventing flash rust stains when used on metal surfaces.
Claims6
In a latex paint primer containing a polyacrylic, polystyrene-acrylic or polyvinyl acetate latex emulsion, said polymeric latex emulsion containing from 45 to 60% solids, the amount of said latex emulsion employed in said latex paint being from 20 to 30%, the improvement comprising having present in said latex paint primer from 5 to 10% of a natural drying oil selected from the group consisting of tung, linseed, safflower, soya bean, peanut and tall oil and from 5 to 15% a basic zinc phosphite having the formula xZnO.ZnHPO.sub.3 where x is a number from 1/2 to 10, thereby forming a paint primer which when used on a metal surface prevents flash rusting, all of the percentages expressed on a weight basis.
In a method for preparing latex paint primer containing polyacrylic, polystyrene-acrylic or polyvinyl acetate latex emulsion said emulsion containing from 45 to 60% solids, the amount of said polymeric latex emulsion employed in said latex paint being from 20 to 30%, the improvement which comprises adding to said latex paint primer from 5 to 10% of a natural drying oil selected from the group consisting of tung, linseed, safflower, soya bean, peanut and tall oil and from 5% to 15% a basic zinc phosphite having the formula xZnO.ZnHPO.sub.3 where x is a number from 1/2 to 10, thereby forming a paint primer which when used on a metal surface prevents flash rusting, all of the percentages expressed on a weight basis.
Dependencies are inferred from the claim text.