US2015197667A1PendingUtilityA1

Polyester polymers comprising lignin

59
Assignee: PPG IND OHIO INCPriority: Jan 15, 2014Filed: Jan 15, 2014Published: Jul 16, 2015
Est. expiryJan 15, 2034(~7.5 yrs left)· nominal 20-yr term from priority
Inventors:Mark P. BowmanCarole A. ConleyIrina G. SchwendemanMercy M. Hibbert
B05D 2350/65C09D 7/40B32B 27/36C08K 5/0025C09D 7/65B05D 7/52B05D 2425/01C08J 2367/00Y10T428/31681B05D 7/16B32B 2311/20C08L 67/03B05D 2602/00C07G 1/00Y10T428/3179B05D 7/50B05D 3/02B32B 2255/06Y10T428/31786B05D 2401/10B32B 2255/28C08L 97/005B32B 2311/30B32B 2311/24B32B 2250/02C09D 167/08C09D 167/00B32B 2255/26B05D 2202/10B32B 15/08B32B 15/09C08J 3/24C08L 67/00C08J 7/042B05D 7/54B32B 2367/00C08G 63/20B32B 2250/03B05D 2401/40B32B 15/012B05D 2508/00C08G 63/133C08H 6/00B05D 7/53C08L 67/08B05D 2202/25B05D 7/14C08J 7/04C08G 63/12B05D 2420/01C09D 167/03B32B 15/043B05D 3/0254C08K 3/013B32B 15/04B32B 27/20C09D 197/005C08L 67/02B05D 7/51C09D 167/02B32B 2307/752C08K 3/011C09D 197/00B05D 7/02C08J 2467/08B05D 7/06C08J 7/043C08J 2497/00
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Claims

Abstract

Disclosed is a polyester polymer prepared from a reaction mixture comprising a polyacid component and a polyol component that comprises lignin. Residues of lignin are incorporated into the backbone of the polyester polymer. Coatings comprising the same and substrates coated at least in part with such coatings are also disclosed.

Claims

exact text as granted — not AI-modified
The invention claimed is: 
     
         1 . A thermoset coating composition comprising a polyester prepared from a reaction mixture comprising (a) a polycarboxylic acid component and (b) a polyol component comprising lignin, such that residues of lignin are incorporated into the polyester. 
     
     
         2 . The coating composition of  claim 1 , wherein said polyol component further comprises a hydroxyl functional component other than lignin. 
     
     
         3 . The coating composition of  claim 2 , wherein the weight ratio of the lignin to the hydroxyl functional component is 1:30 to 30:1. 
     
     
         4 . The coating composition of  claim 2 , wherein lignin comprises 1 to 50 weight % of the polyester, with the weight % based on total solids. 
     
     
         5 . The coating composition of  claim 1 , wherein the lignin comprises wheat straw lignin. 
     
     
         6 . The coating composition of  claim 1 , wherein the lignin comprises wood lignin. 
     
     
         7 . A coating system comprising a primer coating and at least one coating layer thereover, the primer coating comprising the coating composition of  claim 1 . 
     
     
         8 . The coating system of  claim 7 , wherein said at least one coating layer comprises a colored pigment. 
     
     
         9 . The coating system of  claim 7 , wherein said at least one coating layer comprises a clearcoat layer. 
     
     
         10 . A substrate coated at least in part with the coating composition of  claim 1 . 
     
     
         11 . The substrate of  claim 10 , wherein the substrate is metallic. 
     
     
         12 . The substrate of  claim 11 , wherein the coating composition provides increased protection of the metallic substrate from corrosion as compared to a substrate coated with a coating composition comprising a polyester polymer not incorporating lignin. 
     
     
         13 . The substrate of  claim 10 , wherein the substrate is wood or plastic. 
     
     
         14 . A method of protecting a substrate from corrosion comprising applying to the substrate the coating composition of  claim 1 . 
     
     
         15 . The method of  claim 14  wherein the substrate is metallic.

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