TH15997B - Pigments are a new type of resin-coated metal and metal coating material used in these areas. - Google Patents

Abstract

The process for the production of resin-coated metallic pigments with a resin layer formed on the surface of the metallic pigment by polymerization is carried out using (A) at least one selected member from the radically polymerizable unsaturated carboxylic acid group and/or diester or monoester of phosphoric (phosphonic) diester or monoester containing one or two radically polymerizable double bonds; (B) at least one monomer containing three or more polymerizable double bonds; and (C) a polymerization starter characterized by the first addition of (A) to the metallic pigment, followed by subsequent supplemental additions of at least one of (B) and (C), whereby the resin-coated metallic pigment provides a metallic coating film with excellent weather resistance, chemical resistance, and gloss, and excellent storage stability in aqueous coating materials such as Metallic coating materials are obtained by coating metallic pigments with the aforementioned resin.

Claims (3)

1. Process for preparing resin coated metal pigments. With a layer of resin which causes Depending on the surface of the metal pigments By performing polymerization with the use of at least one member (A). Selected from a group containing carbosilicic acid Unsaturated that can form poly A radical, a mono ester or a phosphoric di ester or a phosphoric dieter with a double bond that can form a polymers. Radical, one or two bonds And coupled with double bonds That can form poly Radical (B) monomer combination with double bond. Where three-bond radical polymers and double-bonded monomers can be formed. Where four or more radical bonds can be formed, and (C) polymerization initiators. Which is characterized by adding (A) first to perform Splicing of metal pigments Followed by an addition And continued At least, it is (B) and (C) over 20% or more of the polymerization period and the ratio of double-bonded monomers. The ability to form four or more radical polymers is 10% to 60% by weight on the basis of total weight. Of monomers with double bonds that Three or more radical polymers can be formed. 2.Resin coated metal pigments With a layer of resin which makes it happen on the surface of the Pig Metal By polymerization by applying (A) at least one member selected from a group containing carboxylic acids. Unsaturated polymers that can form radical polymers, mono ester or phosphoric diasters, or double bond phosphoric polymers. That can form polymers Radical, one or two bonds And coupled with double bonds That can form radical polymers (B). Combination of double-bonded monomers Where three-bond radical polymers and double-bonded monomers can be formed. Where four or more radical bonds can be formed, and (C) polymerization initiators. This was prepared by the method of claim 1, which had alkali resistance of (Delta) E of 2.0 or less, where (Delta) E was the color difference between the immersed portion. And the part that is not soaked When the coated plates were immersed in 2.5N aqueous solution of NaOH and left at 20 ํ for 24 hours. 3.Material of the metal coating It consists of metal pigments coated with resin. Set out in claim 2