US 12,234,379 B2
Multi-stage polymeric latexes, coating compositions containing such latexes, and articles coated therewith
Robert M. O'Brien, Monongahela, PA (US); Mark Stuetelberg, Hiawatha, KS (US); Joseph D. Desousa, Pittsburgh, PA (US); Mary Jo Scandolari, Coraopolis, PA (US); Nikolaus Koch, Greensburg, PA (US); Stephen Pollin, Ambridge, PA (US); and Nusrah Hussain, Gibsonia, PA (US)
Assigned to SWIMC LLC, Cleveland, OH (US)
Filed by SWIMC LLC, Cleveland, OH (US)
Filed on Aug. 5, 2022, as Appl. No. 17/882,332.
Application 17/882,332 is a continuation of application No. 16/805,602, filed on Feb. 28, 2020, granted, now 11,466,162.
Application 16/805,602 is a continuation of application No. PCT/US2018/049143, filed on Aug. 31, 2018.
Claims priority of provisional application 62/725,204, filed on Aug. 30, 2018.
Claims priority of provisional application 62/553,309, filed on Sep. 1, 2017.
Prior Publication US 2023/0047189 A1, Feb. 16, 2023
Int. Cl. C09D 5/02 (2006.01); C08F 220/06 (2006.01); C08F 220/14 (2006.01); C08F 265/06 (2006.01); C09D 151/00 (2006.01)
CPC C09D 5/027 (2013.01) [C08F 220/06 (2013.01); C08F 220/14 (2013.01); C08F 265/06 (2013.01); C09D 151/003 (2013.01)] 80 Claims
 
1. An aqueous coating composition comprising:
a resin system including:
a water-dispersible polymer comprising a solution-polymerized acrylic polymer, a polyether polymer, a polyolefin polymer, a polyester polymer, or a mixture or copolymer thereof; and
a multi-stage polymeric latex having two or more emulsion polymerized stages in an aqueous carrier liquid, wherein the water-dispersible polymer is incorporated into the multi-stage polymeric latex, blended with the multi-stage polymeric latex, or both; the aqueous coating composition is a sprayable composition for a food or beverage container; and wherein the latex has 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; and
wherein the coating composition is substantially free of each of bisphenol A, bisphenol F, and bisphenol S.