Synthesis of zinc acrylate copolymer from acid functional copolymer, zinc pyrithione, and copper compound
AssigneeArch Chemicals, Inc.
InventorsPaul S. Kappock, Kazunobu Takahashi
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Abstract
Disclosed is a composition containing zinc ester functional polymer and particulate copper pyrithione, wherein the particles have an average aspect ratio within a range of from about 8 to about 15, where the zinc ester functional polymer and the copper pyrithione are obtained by reacting an acid functional polymer with zinc pyrithione and a copper salt or a copper carboxylate. Also disclosed is an antifouling coating containing such a composition.
Claims13
A process for producing a composition containing a zinc ester functional polymer and particles of copper pyrithione where the particles have an average aspect ratio of from about 8 to about 15 comprising the steps of:
- reacting an acid functional polymer with zinc pyrithione in a solvent to form a solution comprising the zinc ester functional polymer;
- adding a copper compound to the solution comprising zinc ester functional polymer, wherein the copper compound is selected from copper salts, copper carboxylates, copper hydroxide, elemental copper, and combinations thereof;
- and
- mixing the solution comprising the copper compound and the zinc ester function polymer to form the particles of copper pyrithione.
A process for producing a composition containing a zinc acrylate polymer and particles of copper pyrithione where the particles have an average aspect ratio of from about 8 to about 15 comprising the steps of:
- reacting an acid functional acrylic polymer with zinc pyrithione in a solvent to form a solution comprising the zinc acrylate polymer;
- adding a copper compound to the solution comprising zinc ester functional polymer, wherein the copper compound is selected from copper salts, copper carboxylates, copper hydroxide, elemental copper, and combinations thereof;
- and
- mixing the solution comprising the copper compound and the zinc acrylate polymer to form the particles of copper pyrithione.
A process for producing a composition containing a zinc acrylate polymer and particles of copper pyrithione comprising the steps of:
- reacting an acid functional acrylic polymer with zinc pyrithione in a mixture of methoxypropanol and acetic acid to form a solution comprising the zinc acrylate polymer;
- adding a copper compound to the solution comprising zinc ester functional polymer, wherein the copper compound is selected from copper carbonate, copper nitrate, copper sulfate, copper chloride, copper carboxylates, copper hydroxide, elemental copper, and combinations thereof;
- and
- mixing the solution comprising the copper compound and the zinc acrylate polymer to form the particles of copper pyrithione, wherein the particles of copper pyrithione have an average aspect ratio of from about 8 to about 15.
Dependencies are inferred from the claim text.