MULTI-STAGE POLYMERIC LATEXES, COATING COMPOSITIONS CONTAINING SUCH LATEXES, AND ARTICLES COATED THEREWITH
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United States of America
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Issued Date -
Dec 5, 2024
app pub date -
May 6, 2024
filing date -
May 6, 2024
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Abstract
An aqueous coating composition useful in coating a variety of substrates, including interior or exterior portions of food or beverage cans. The coating composition includes a multi-stage polymeric latex having two or more emulsion polymerized stages in an aqueous carrier liquid, wherein the latex has one or both of:
- (i) a lower glass transition temperature (Tg) emulsion polymerized stage having a calculated Tg that is at least 20° C. lower than a calculated Tg of a higher Tg emulsion polymerized stage, or(ii) a gradient Tg with at least a 20° C. differential in the calculated Tg of monomers fed at the start of polymerization compared to monomers fed at the end of polymerization.
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