US2002065369A1PendingUtilityA1

Low gloss powder coating composition

38
Priority: Sep 26, 1997Filed: Oct 22, 2001Published: May 30, 2002
Est. expirySep 26, 2017(expired)· nominal 20-yr term from priority
Inventors:Eric Dumain
C09D 133/14C08L 35/06C09D 5/032
38
PatentIndex Score
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Claims

Abstract

The present invention provides a low gloss powder coating composition comprising a glycidyl-containing acrylic polymer, a first acid functional crosslinking agent comprising a copolymer of an ethylenically unsaturated compound and an anhydride of a dicarboxylic acid and a second acid functional crosslinking agent comprising a dicarboxylic acid having 4 to 20 carbons.

Claims

exact text as granted — not AI-modified
That which is claimed:  
     
         1 . A powder coating composition comprising: 
 a glycidyl-containing acrylic polymer;    a first acid functional crosslinking agent comprising a copolymer of an ethylenically unsaturated compound and an anhydride of a dicarboxylic acid; and    a second acid functional crosslinking agent comprising a dicarboxylic acid having 4 to 20 carbons.    
     
     
         2 . The powder coating composition according to  claim 1  wherein the first acid functional crosslinking agent is styrene/maleic anhydride copolymer.  
     
     
         3 . The powder coating composition according to  claim 1  wherein the second acid functional crosslinking agent is dodecanedioic acid.  
     
     
         4 . The powder coating composition according to  claim 1  wherein the glycidyl-containing acrylic polymer is modified with a monobasic acid.  
     
     
         5 . The powder coating composition according to  claim 4  wherein the monobasic acid is methyl methacrylate.  
     
     
         6 . The powder coating composition according to  claim 1  further including a carboxylic group-containing polyester resin.  
     
     
         7 . The powder coating composition according to  claim 1  further including a polyepoxy resin.  
     
     
         8 . An article coated with the polymer coating composition of  claim 1 .  
     
     
         9 . A powder coating composition comprising: 
 60 to 80 percent by weight of a glycidyl-containing acrylic polyer;    5 to 30 percent by weight of a first acid functional crosslinking agent comprising a copolymer of an ethylenically unsaturated compound and an anhydride of a dicarboxylic acid; and    5 to 15 percent by weight of a second acid functional crosslinking agent comprising a dicarboxylic acid having 4 to 20 carbons.    
     
     
         10 . The powder coating composition according to  claim 9  wherein the first acid functional crosslinking agent is styrene/maleic anhydride copolymer.  
     
     
         11 . The powder coating composition according to  claim 9  wherein the second acid functional crosslinking agent is dodecanedioic acid.  
     
     
         12 . The powder coating composition according to  claim 9  wherein the glycidyl-containing acrylic polymer is modified with 1 to 20 percent by weight of the glycidyl-containing acrylic polymer of a monobasic acid.  
     
     
         13 . The powder coating composition according to  claim 12  wherein the monobasic acid is methyl methacrylate.  
     
     
         14 . The powder coating composition further including 0.5 to 10 percent by weight of a carboxylic group-containing polyester resin.  
     
     
         15 . The powder coating composition according to  claim 9  further including 0.5 to 25 percent by weight of a polyepoxy resin.  
     
     
         16 . An article coated with the polymer coating composition of claim  9 .

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