Corrosion inhibitor formulations with improved performance, lower toxicity and reduced manufacturing hazards
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United States of America Patent
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Jul 19, 2011
Grant Date -
Jan 25, 2007
app pub date -
May 10, 2006
filing date -
May 20, 2005
priority date (Note) -
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Abstract
Aqueous corrosion inhibitor compositions, preferably storage-stable, useful in acidic cleaning solutions for cleaning the surfaces of metal, comprising reaction products of at least one rosin amine component, at least one non-flammable liquid ketone component, at least one carboxylic acid component, at least one paraformaldehyde component and water; aqueous acidic cleaners prepared therefrom; and methods of their use. The inventive corrosion inhibitor compositions are made by a simple process which reduces the presence of toxic and/or flammable raw materials, co-products, residual reactants and chloride ion while providing acid inhibition in aqueous acidic cleaners.
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