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US 12,187,912 B2Granted
Polyester coating compositions containing polymers derived from cyclic carbonates
AssigneeSwimc LLC
InventorsAndriot Matthieu, Sebastien Gibanel, Benoit Prouvost
Life of this patent
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Abstract
A coating composition is provided that includes (a) a polyester polymer derived by esterifying an aryloxy ether polyol (e.g., an aryloxy ether diol) derived from reaction between a polyhydric phenol or a polyphenol and a non-hydroxyl functional cyclic carbonate, or from reaction between a monophenol and a hydroxyl functional cyclic carbonate; (b) a crosslinker and (c) an optional catalyst.
Claims28
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:
- 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.
20 more elements
A method for producing a coated food or beverage container or portion thereof, comprising:
- applying a coating composition on a metal substrate prior to, during, or after forming the substrate into the food or beverage container or portion thereof, wherein the coating composition is a water-based coating composition comprising:
- (a) a polyester polymer derived by esterifying an 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:
- 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;
- and
- curing the coating composition on the metal substrate.
20 more elements
A food or beverage coating composition suitable for use in forming a food-contact coating of a metal food or beverage container, wherein the coating composition is a water-based coating composition comprising:
- (a) a polyester polymer derived by esterifying an aryloxy ether polyol derived from reactants including:
- (i) a polyhydric phenol or a polyphenol and a non-hydroxyl functional cyclic carbonate, or
- (ii) a monophenol and a hydroxyl functional cyclic carbonate,
- and the aryloxy ether polyol having groups of the formula:
- 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;
- wherein the polyester polymer:
- has a molecular weight (Mn) of at least about 1,500 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 water dispersible or water soluble;
- has an acid number greater than 20;
- and
- (b) an optional crosslinker;
- and
- (c) an optional catalyst;
- wherein the polyester polymer is substantially free of bisphenol A (BPA).
17 more elements
Dependencies are inferred from the claim text.