Polymer having polycyclic groups and coating compositions thereof
View Patent ↗A polymer and coating composition containing the polymer are provided that are useful in coating applications such as, for example, food or beverage packaging containers. The polymer preferably includes a backbone having one or more polycyclic groups. In one embodiment, the polymer is a polyester and, more preferably, a polyester-urethane polymer. In one embodiment, the one or more polycyclic groups is a tricyclic or higher group.
1. A method, comprising:
providing a coating composition comprising:
a polymer having a polycyclic group and a backbone that includes both ester and urethane linkages, and
a liquid carrier; and
applying the coating composition on a metal substrate prior to, or after, forming the metal substrate into a food or beverage can or a portion thereof.
2. The method of claim 1 , wherein the polycyclic group comprises a bridged polycyclic group.
3. The method of claim 1 , wherein the polycyclic group comprises a fused polycyclic group.
4. The method of claim 1 , wherein the polymer includes at least 10 weight percent of polycyclic groups, based on the weight percent of polycyclic-group-containing monomer relative to the total weight of the polymer.
5. The method of claim 1 , wherein the polymer has a glass transition temperature of at least 50° C.
6. The method of claim 1 , wherein the polycyclic group includes a heteroatom in a ring of the polycyclic group.
7. A food or beverage can, or a portion thereof, resulting from the method of claim 1 , wherein the coating composition is located on an inside surface of the food or beverage can or a portion thereof.
8. The method of claim 1 , wherein the polycyclic group comprises a saturated group.
9. The method of claim 8 , wherein the polycyclic group comprises a bicyclic group.
10. The method of claim 1 , wherein the polycyclic group is an at least tricyclic group.
11. The method of claim 10 , wherein the at least tricyclic group includes a substituted or unsubstituted tricyclodecane group.
12. The method of claim 11 , wherein the at least tricyclic group is provided by tricyclodecane dimethanol.
13. The method of claim 1 , wherein the polymer was formed via reaction of ingredients including a polyisocyanate compound and a polyol.
14. The method of claim 13 , wherein the polyisocyanate compound comprises isophorone diisocyanate or hexamethylene diisocyanate.
15. A method, comprising:
providing a coating composition comprising:
a polymer having an at least tricyclic group and a backbone that includes both ester and urethane linkages, wherein the polymer has a glass transition temperature of at least 50° C. and includes at least 10 weight percent of polycyclic groups, based on the weight percent of polycyclic-group-containing monomer relative to the total weight of the polymer, and
a liquid carrier;
applying the coating composition on a metal substrate; and
forming the metal substrate into a food or beverage can or a portion thereof.
16. A coating composition comprising:
a polymer having an at least tricyclic group and a backbone that includes both ester and urethane linkages, wherein the polymer has a number average molecular weight of at least 1,500; and
a liquid carrier.
17. The coating composition of claim 16 , wherein the polymer is derived from ingredients including a non-aromatic isocyanate compound.
18. The coating composition of claim 17 , wherein the polymer has a glass transition temperature of at least 50° C., and where the coating composition includes, based on total weight solids, at least 10% by weight of the polymer.
19. The coating composition of claim 16 , wherein the at least tricyclic group is provided by tricyclodecane dimethanol, tricyclodecane diamine, tricyclodecane diisocyanate, or a derivative or mixture there.
20. The coating composition of claim 19 , wherein the polymer was formed via reaction of ingredients including a polyisocyanate compound and a polyol, and wherein the polyisocyanate compound comprises isophorone diisocyanate or hexamethylene diisocyanate.