US 12,187,912 B2
Polyester coating compositions containing polymers derived from cyclic carbonates
Andriot Matthieu, Attignat (FR); Sebastien Gibanel, Givry (FR); and Benoit Prouvost, Abergement de Cuisery (FR)
Assigned to SWIMC LLC, Cleveland, OH (US)
Filed by SWIMC LLC, Cleveland, OH (US)
Filed on Nov. 26, 2019, as Appl. No. 16/696,250.
Application 16/696,250 is a continuation of application No. 15/127,995, granted, now 10,526,506, previously published as PCT/US2015/023317, filed on Mar. 30, 2015.
Claims priority of provisional application 61/971,779, filed on Mar. 28, 2014.
Prior Publication US 2020/0095457 A1, Mar. 26, 2020
Int. Cl. C09D 167/00 (2006.01); B65D 25/14 (2006.01); B65D 85/72 (2006.01); C08G 63/47 (2006.01); C08G 63/64 (2006.01); C08G 63/668 (2006.01); C09D 167/07 (2006.01)
CPC C09D 167/00 (2013.01) [B65D 25/14 (2013.01); B65D 85/72 (2013.01); C08G 63/47 (2013.01); C08G 63/64 (2013.01); C08G 63/668 (2013.01); C09D 167/07 (2013.01)] 28 Claims
 
1. A food or beverage container or portion thereof comprising:
a metal substrate; and
a coating on at least a portion of the metal substrate, wherein the coating is formed from a water-based coating composition comprising:
(a) a polyester polymer prepared by esterifying an aryloxy ether polyol, the aryloxy ether polyol derived from reactants including:
(i) a non-hydroxyl functional cyclic carbonate and at least one of a polyhydric phenol or a polyphenol, or
(ii) a monophenol and a hydroxyl functional cyclic carbonate,
and the aryloxy ether polyol having groups of the formula:

OG Complex Work Unit Chemistry
wherein:
R2 is hydrogen or an organic group;
R5 is an alkylene group;
x is 0 to about 2; and
y is 1 to about 10;
(b) an optional crosslinker; and
(c) an optional catalyst,
wherein the polyester polymer:
has a number average molecular weight (Mn) of at least about 1,500 and less than about 20,000, and has a Tg of at least 0° C. and less than 100° C.;
contains a plurality of segments derived from the aryloxy ether polyol and at least about 15 wt. % and less than about 50 wt. % aromatic ring segments, based on the weight of aromatic ring carbon atoms compared to the dry polyester polymer weight;
is substantially free of bisphenol A (BPA);
is water dispersible or water soluble; and
has an acid number greater than 20.