Polymeric corrosion inhibitors
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United States of America Patent
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Feb 12, 2013
Grant Date -
May 10, 2012
app pub date -
Jul 1, 2010
filing date -
Jul 3, 2009
priority date (Note) -
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Abstract
The present invention relates to the use of a product obtainable by the reaction of an alkoxylated fatty amine with a dicarboxyhc acid derivative, followed by partial or total quaternization of the reaction product obtained; or by reacting a product with a dicarboxylic acid derivative, followed by partial or total quaternization of the reaction product obtained. The product consists of >60% w/w of oligomers/polymers with at least two alkoxylated amine units and one or more diacid/acid anhydride unit or >50% w/w of oligomers/polymers with at least two alkoxylated amine units and two or more diacid/acid anhydride units; as a corrosion inhibitor for metal surfaces. The invention also relates to a method for protecting a metal surface from corrosion by contacting the metal surface with said corrosion inhibitor.
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