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US 6,146,704 AGranted
Use of aqueous polymer dispersions for protecting metallic surfaces against corrosion
AssigneeBASF SE
InventorsGregor Brodt, Arend Jouke Kingma, Ulrich Schroder
Life of this patent
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Abstract
Aqueous polymer dispersions based on copolymers of C.sub.2 -C.sub.14 olefins and monomers which contain acidic functional groups or are able to form them by hydrolysis, which dispersions may also contain colorants and/or corrosion inhibitors dispersed or dissolved in the polymer phase, are used for protecting metallic surfaces against corrosion.
Claims12
A method of protecting metallic surfaces against corrosion, comprising:
- applying to a metal surface an aqueous polymer dispersion having an aqueous phase and polymer phase, which comprises a component (I) and a component (II), wherein
- component (I) comprises at least one polymer which includes in copolymerized form at least one C.sub.2 -C.sub.14 -olefin (monomer (a)), at least one monomer (b), which is copolymerizable with monomer (a) and has at least one acidic functional group and/or a functional group which is converted by hydrolysis into an acidic functional group, and, optionally, additional monomers (c), and
- component (II) comprises at least one colorant and/or one corrosion inhibitor and, optionally, a UV stabilizer, wherein component (II) is almost completely dispersed or dissolved in the polymer phase, and wherein the content of colorant and/or corrosion inhibitor is from 0.05 to 50% by weight, based on the weight of the polymer;
- and
- drying the applied dispersion to form a solid polymer film on the metal surface.
2 more elements
Dependencies are inferred from the claim text.