US2015322271A1PendingUtilityA1

Chromate free pretreatment primer

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Assignee: PRC DESOTO INT INCPriority: May 9, 2014Filed: May 9, 2014Published: Nov 12, 2015
Est. expiryMay 9, 2034(~7.8 yrs left)· nominal 20-yr term from priority
Inventors:Didier LaboucheMarie-Noelle MailletSiamanto Abrami
C09D 7/40C08K 2003/222C08G 59/00C09D 5/082C08G 59/50Y10T428/31529C08G 2150/90C09D 7/61C09D 5/084C08G 59/4085C09D 5/002C09D 5/08C08K 2201/019C09D 163/00C08K 3/22C08G 59/686C08G 59/245C09D 7/63C08G 59/28C08K 5/544C08K 5/548C08G 59/40
57
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Claims

Abstract

A coating comprising epoxy functional resin, corrosion resistant particles, and a multi-functional crosslinker are disclosed as are methods of using such a coating to coat at least a portion of a substrate and a substrate coated thereby.

Claims

exact text as granted — not AI-modified
1 . A coating comprising:
 (a) a first component comprising:
 (i) an epoxy functional resin; and 
 (ii) a corrosion resisting particle; and 
   (b) a second component comprising a crosslinker having a first functionality that crosslinks with the epoxy functionality of the first component and a second functionality that self-crosslinks.   
     
     
         2 . The coating of  claim 1 , wherein the epoxy functional resin comprises a residue of bisphenol-A. 
     
     
         3 . The coating of  claim 1 , wherein the epoxy comprises urethane epoxy. 
     
     
         4 . The coating of  claim 1 , wherein the corrosion inhibitor comprises MgO. 
     
     
         5 . The coating of  claim 4 , wherein the MgO has a surface area of at least 10 square meters per gram. 
     
     
         6 . The coating of  claim 1 , wherein the coating further comprises an amino acid. 
     
     
         7 . The coating of  claim 1 , wherein the crosslinker comprises silane. 
     
     
         8 . The coating of  claim 7 , wherein the silane comprises dipodal silane. 
     
     
         9 . The coating of  claim 7 , wherein the silane consists essentially of dipodal silane. 
     
     
         10 . The coating of  claim 8 , wherein the silane comprises bis(trimethoxysilylpropyl)amine. 
     
     
         11 . The coating of  claim 9 , wherein the silane comprises bis(trimethoxysilylpropyl)amine. 
     
     
         12 . The coating of  claim 1 , wherein the second component further comprises an amine catalyst. 
     
     
         13 . The coating of  claim 12 , wherein the amine catalyst comprises a tertiary amine. 
     
     
         14 . The coating of  claim 7 , wherein the functionality reacting with epoxy is amine. 
     
     
         15 . The coating of  claim 1 , wherein said coating is substantially free of chromium. 
     
     
         16 . The coating of  claim 1 , wherein said coating is substantially free of praseodymium oxide. 
     
     
         17 . A method of coating a substrate comprising applying to at least a portion of the substrate the coating of  claim 1 . 
     
     
         18 . A substrate coated according to  claim 17 . 
     
     
         19 . The substrate of  claim 18 , wherein the substrate comprises aluminum. 
     
     
         20 . The substrate of  claim 18 , wherein the substrate comprises steel. 
     
     
         21 . The coating of  claim 1 , wherein the coating is substantially free of a rare earth element. 
     
     
         22 . The coating of  claim 1 , wherein the coating cures at ambient conditions.

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