Catalyzing cationic resin and blocked polyisocyanate with bismuth carboxylate
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United States of America Patent
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Mar 5, 2002
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app pub date -
Feb 10, 1999
filing date -
Feb 10, 1999
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Abstract
A method of catalyzing a cationic coating comprising a cationic resin such as an epoxy resin-amine reaction product or a copolymer of a cationic monomer, and a blocked polyisocyanate, wherein a catalyst is added, said catalyst selected from the group consisting of bismuth carboxylate(s) having a hydrocarbon chain of from 11 to 36 carbon atoms and a molecular weight of from 165-465, and a mixture of a bismuth salt selected from the group consisting of bismuth oxide and bismuth chloride, and a carboxylic acid having a hydrocarbon chain of from 11 to 36 carbon atoms and a molecular weight of from 165-465.
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