US2018112102A1PendingUtilityA1

Coating compositions for packaging articles and methods of coating

71
Assignee: VALSPAR SOURCING INCPriority: Apr 16, 2010Filed: Nov 3, 2017Published: Apr 26, 2018
Est. expiryApr 16, 2030(~3.8 yrs left)· nominal 20-yr term from priority
Inventors:Richard H. EvansJeffrey NiederstRobert M. O'BrienBenoit ProuvostKevin RomagnoliGrant SchuttePaul StensonTom Van Kuren
C09D 5/08C09D 171/08B05D 2518/00B65D 25/34B05D 7/14C08G 59/24C09D 171/12Y10T428/1355B05D 3/007C09D 171/00B05D 7/227C08G 59/066B05D 7/24B65D 25/00B21D 31/00
71
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Claims

Abstract

This invention provides a polymer that is useful in a variety of applications, including as a binder polymer of a coating composition, and especially a packaging coating composition. Packaging articles (e.g., containers) comprising the polymer and methods of making such packaging articles are also provided.

Claims

exact text as granted — not AI-modified
1 - 25 . (canceled) 
     
     
         26 . A food or beverage can coating composition that includes:
 a polyether polymer having a backbone that includes a polycyclic group; and   a carrier liquid;   wherein the coating composition is at least substantially free of bisphenol A and the diglycidyl ether of bisphenol A and is suitable for use in forming a food-contact coating.   
     
     
         27 . The coating composition of  claim 26 , wherein the backbone includes —CH 2 —CH(OH)—CH 2 — segments. 
     
     
         28 . The coating composition of  claim 26 , wherein the polyether polymer includes one or more of the following segments of Formula I:
   —O—Ar—(R n —Ar) n —O—,  (I)
   
       wherein:
 each Ar is independently an aryl or heteroaryl group, 
 each n is independently 0 or 1, 
 R, if present, is a divalent organic group, and 
 the two oxygen atoms are each ether oxygen. 
 
     
     
         29 . The coating composition of  claim 28 , wherein n is 0. 
     
     
         30 . The coating composition of  claim 28 , wherein each n is 1 and R includes the polycyclic group. 
     
     
         31 . The coating composition of  claim 26 , wherein the polyether polymer has a Tg of at least 30° C. 
     
     
         32 . The coating composition of  claim 26 , wherein the polyether polymer has a number average molecular weight of at least 2,000. 
     
     
         33 . The coating composition of  claim 26 , wherein the polyether polymer is a reaction product of ingredients including a polyepoxide and a polyhydric phenol. 
     
     
         34 . The coating composition of  claim 33 , wherein one or both of the polyepoxide or polyhydric phenol is derived from isosorbide. 
     
     
         35 . The coating composition of  claim 26 , wherein the polyether polymer is a reaction product of ingredients including a diepoxide and a dihydric phenol, and wherein one or both of the diepoxide and the diphenol includes a polycyclic group. 
     
     
         36 . The coating composition of  claim 26 , wherein the polycyclic group comprises a bicyclic group. 
     
     
         37 . The coating composition of  claim 36 , wherein the bicyclic group is a saturated bicyclic group. 
     
     
         38 . The coating composition of  claim 36 , wherein the bicyclic group comprises a tricyclic or higher group. 
     
     
         39 . The coating composition of  claim 38 , wherein the tricyclic or higher group comprises a tricyclodecane group. 
     
     
         40 . The coating composition of  claim 26 , wherein the polycyclic group comprises an isosorbide group. 
     
     
         41 . The coating composition of  claim 26 , wherein the coating composition is a water-based system, and wherein the polyether polymer constitutes at least 10 wt-% of the total resin solids in the coating composition. 
     
     
         42 . The coating composition of  claim 26 , wherein the coating composition includes a crosslinker. 
     
     
         43 . The coating composition of  claim 42 , wherein the crosslinker comprises a phenoplast. 
     
     
         44 . The coating composition of  claim 26 , wherein the backbone includes a plurality of polycyclic groups. 
     
     
         45 . The coating composition of  claim 44 , wherein the polyether polymer includes one or more pendant hydroxyl groups attached to backbone carbon atoms. 
     
     
         46 . The coating composition of  claim 44 , wherein the polyether polymer has a Tg of at least 70° C. 
     
     
         47 . The coating composition of  claim 44 , wherein the polyether polymer has a Tg from about 80° C. to about 110° C. 
     
     
         48 . The coating composition of  claim 44 , wherein the polyether polymer is a reaction product of ingredients including a diepoxide and a dihydric phenol. 
     
     
         49 . The coating composition of  claim 44 , wherein the coating composition is a solvent-based system, and wherein the polyether polymer constitutes at least 30 wt-% of the total resin solids in the coating composition. 
     
     
         50 . A metal food or beverage can or a portion thereof having a food-contact coating formed from the coating composition of  claim 26 . 
     
     
         51 . A food or beverage can coating composition that includes:
 a polyether polymer formed form ingredients including a diepoxide and a diphenol, wherein the diepoxide is derived from isosorbide; and   a carrier liquid;   wherein the coating composition is at least substantially free of bisphenol A and the diglycidyl ether of bisphenol A and is suitable for use in forming a food-contact coating.   
     
     
         52 . The coating composition of  claim 51 , wherein the polyether polymer has a Tg of at least 70° C. 
     
     
         53 . A metal food or beverage can or a portion thereof having a food-contact coating formed from the coating composition of  claim 51 . 
     
     
         54 . A method, including:
 applying a coating composition on at least a portion of a surface of a metal substrate prior to, or after, forming the substrate into a food or beverage container or a portion thereof;   wherein the coating composition is at least substantially free of bisphenol A and the diglycidyl ether of bisphenol A and comprises:
 a polyether polymer having a backbone that includes a polycyclic group; and 
 a carrier liquid. 
   
     
     
         55 . The method of  claim 54 , wherein the polycyclic group comprises a tricyclodecane group. 
     
     
         56 . The method of  claim 54 , wherein the polycyclic group comprises an isosorbide group. 
     
     
         57 . The method of  claim 54 , wherein the coating composition is applied to the metal substrate after forming the substrate into a food or beverage container or a portion thereof.

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