Amino acid copolymers of maleic acid
AssigneeSRCHEM Incorporated
InventorsLouis L. Wood, Gary J. Calton
Life of this patent
Estimating the term…
Abstract
Polymers of maleic, fumaric or malic acids or maleic, fumaric or malic acid and ammonia with amino acids are prepared by heating at 180.degree.-350.degree. C., preferably 200.degree.-300.degree. C. The polymer formed may be converted to a salt by hydrolysis with a metal hydroxide or ammonium hydroxide.
Claims10
A polymer produced by thermally polymerizing (1) a member of the group consisting of maleic acid, malic acid and fumaric acid, (2) ammonia, and (3) a polyamine containing amino acid in which the ratio of said acid to polyamine containing amino acid is 3:1 or less.
A method of preventing deposition of scale from mineral containing water comprising adding an effective amount of the composition of claim 8 to said water.
A method of preventing deposition of scale from mineral-containing water comprising adding an effective amount of the composition comprised of a polymer produced by thermally polymerizing (1) a member of the group consisting of maleic acid, malic acid, and fumaric acid, (2) ammonia, and (3) a polyamine containing amino acid in which the ratio of said acid to polyamine containing amino acid is 3:1 or less wherein said polymer is converted to a salt by the addition of an alkaline-earth or alkali metal hydroxide or ammonium hydroxide, to said water.
Dependencies are inferred from the claim text.