Salts of polyaspartic acid by high temperature reaction

Details Salts of polyaspartic acid by high temperature reaction Salts of polyaspartic acid by high temperature reaction

C - Chemistry, Metallurgy

08

G

C08G 69/00 (2006.01) C02F 5/12 (2006.01) C05G 3/00 (2006.01) C08G 69/10 (2006.01) C08G 69/48 (2006.01) C08G 73/10 (2006.01) C11D 3/37 (2006.01)

Patent

CA 2135638

Polyaspartate, useful for inhibition of incrustations due to materials causing hardness in water and of value in detergent formulations, can be prepared by reacting maleic acid or fumaric acid with ammonia in a molar ratio of 1:1-2.1 at temperatures greater than 170 ° C., followed by conversion of the polymer formed in this reaction to a salt of polyaspartic acid by basic hydro- lysis.

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