Acrylic modified waterborne alkyd dispersions
AssigneeEastman Chemical Company
InventorsMark D. Clark, Bradley J. Helmer
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Abstract
A water-based latex of an acrylic-modified waterborne alkyd dispersion in water is described. The acrylic-modified waterborne alkyd is a hybrid resin prepared by the polymerization of at least one latent oxidatively-functional (LOF) acrylic monomer in the presence of a waterborne alkyd. Preparation of the latexes may be achieved by emulsion polymerization of at least one latent oxidatively-functional acrylic monomer in the presence of a waterborne alkyd whereby the latent oxidative functionality of the acrylic polymer survives polymerization. Such acrylic-modified waterborne alkyds are useful in a variety of coating compositions.
Claims19
A latent oxidatively-functional-modified alkyd comprising the product of at least one latent oxidatively-functional monomer polymerized in the presence of a waterborne alkyd with the proviso that said waterborne alkyd does not contain a pendant sulfonate group, wherein the resulting latent oxidatively-functional-modified alkyd possesses sufficient available latent oxidatively-functional groups to increase the effective oxidative crosslinking of said latent oxidatively-functional-modified alkyd upon application to a substrate.
A water-based latex comprising water and a latent oxidatively-functional-modified alkyd comprising the polymerization product of at least one latent oxidatively-functional monomer in the presence of an aqueous dispersion of a waterborne alkyd with the proviso that said waterborne alkyd does not contain a pendant sulfonate group, wherein said latent oxidatively-functional-modified alkyd of the latex possesses sufficient available latent oxidatively-functional groups to increase the effective oxidative crosslinking of said latent oxidatively-functional-modified alkyd upon application of the latex to a substrate.
A method of preparing a water-based latex comprising the step of polymerizing at least one latent oxidatively-functional monomer in the presence of an aqueous dispersion of a waterborne alkyd with the proviso that said waterborne alkyd does not contain a pendant sulfonate group, wherein said polymerizing step is conducted under conditions sufficient for the survival of the latent oxidative functionality of said monomer such that the latent oxidatively-functional-modified alkyd of the resulting latex possesses sufficient available latent oxidatively-functional groups to increase the effective oxidative crosslinking of said latent oxidatively-functional-modified alkyd upon application of said latex to a substrate.
Dependencies are inferred from the claim text.