Compositions – Preservative agents – Anti-corrosion
Patent
1994-09-12
1996-07-02
Lieberman, Paul
Compositions
Preservative agents
Anti-corrosion
252392, 252394, 510266, 510335, 510402, C11D 306, C11D 337
Patent
active
055319343
ABSTRACT:
The present invention provides a method of inhibiting corrosion of ferrous metals in aqueous systems. The corrosion is inhibited by adding an effective amount of one or more poly(amino acids) to the aqueous system. Aqueous systems include for example water treatment systems and equipment used for detergent applications. The poly(amino acids) comprise a reaction product of at least one compound selected from amino acids, amic acids, ammonium salts of monoethylenically unsaturated dicarboxylic acids, ammonium salts of hydroxypolycarboxylic acids and combinations thereof.
In one embodiment the poly(amino acids) are added to detergent solutions to inhibit corrosion in equipment for detergent applications. In another embodiment, corrosion inhibitors comprising one or more homopolymers of amino acids and one or more pyrophosphates are added to aqueous systems to inhibit corrosion.
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Corrosion Inhibition By Thermal Polyaspartate, Brenda J. Little and C. Steven Sikes, Chapter 21. 1991 No month available.
U.S. patent application Ser. No. 08/213,648, filed Mar. 16, 1994, For: Acid Catalyzed Process For Preparing Amino Acid Polymers, By: D. E. Adler, et al.
Freeman Michael B.
Hann William M.
Paik Yi H.
Swift Graham
Hild Kimberly R.
Lieberman Paul
Rohm & Haas Company
Tierney Michael P.
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