US 12,460,103 B2
Coating compositions including a polyester, articles, and methods of coating
Christine Beaufreton, Gorges (FR); Arnaud Jegousse, Larmor-plage (FR); Sebastien Gibanel, Givry (FR); Paul Cooke, West View, PA (US); Benjamin Campagne, Montbellet (FR); Matthieu Andriot, Attignat (FR); Philippe Michel, Le Temple de Bretagne (FR); and Floraine Collette, Coureon (FR)
Assigned to SWIMC LLC, Cleveland, OH (US)
Filed by SWIMC LLC, Cleveland, OH (US)
Filed on Oct. 19, 2023, as Appl. No. 18/490,152.
Application 18/490,152 is a continuation of application No. 18/056,943, filed on Nov. 18, 2022, granted, now 11,827,803.
Application 18/056,943 is a continuation of application No. PCT/IB2021/000385, filed on Jun. 3, 2021.
Claims priority of provisional application 62/704,936, filed on Jun. 3, 2020.
Prior Publication US 2024/0174888 A1, May 30, 2024
Int. Cl. C09D 167/02 (2006.01); B65D 5/56 (2006.01); B65D 23/02 (2006.01); B65D 23/08 (2006.01); C08G 63/183 (2006.01); C08G 63/199 (2006.01); C08K 3/22 (2006.01); C08K 5/29 (2006.01)
CPC C09D 167/02 (2013.01) [B65D 5/563 (2013.01); B65D 23/02 (2013.01); B65D 23/0821 (2013.01); C08G 63/183 (2013.01); C08G 63/199 (2013.01); C08K 3/22 (2013.01); C08K 5/29 (2013.01); C08K 2003/2241 (2013.01)] 22 Claims
 
1. A food can coating composition comprising:
a polyester polymer having:
a number average molecular weight (Mn) of less than 10,000,
a glass transition temperature (Tg) of at least 65° C.,
a hydroxyl value greater than 10 mg KOH/g resin, and
one or more cyclic groups selected from a mono-cyclic group having five ring members or less, a polycyclic group, or both;
a crosslinker;
wherein the one or more cyclic groups are in a backbone of the polyester polymer and provided by a diol having a primary hydroxyl group;
wherein the food can coating composition, when applied on tin-plate steel can stock substrate and baked for 15 minutes in a 200° C. oven to achieve a cured coating having an average dry film weight of about 15 grams per square meter, exhibits an MEK double rub value in the MEK Solvent Resistance of Coating test (using a 1,000 gram weight) of at least 25; and
wherein the food can coating composition is an organic-solvent-based white or gold interior food can coating composition.