Process for preparing aspartic acid polycondensates with...

Details Process for preparing aspartic acid polycondensates with... Process for preparing aspartic acid polycondensates with...

C - Chemistry, Metallurgy

08

G

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

Patent

CA 2196336

A process is disclosed for preparing aspartic acid polycondensates with improved biological degradability by thermal polycondensation of finely powdered aspartic acid in solid phase, at temperatures from 180 to 250 ~C, until maximum 70 % by weight of the theoretically possible amount of water produced during polycondensation are removed from the reaction mixture. Also disclosed is the use of the thus produced polycondensates as additives for washing and cleaning agents and as scale inhibitors.

Un procédé permet de préparer des polycondensés d'acide aspartique à biodégradabilité améliorée par polycondensation thermique d'acide aspartique finement pulvérisé en phase solide, à des températures comprises entre 180 et 250 ~C, jusqu'à ce qu'au maximum 70 % en poids de la quantité d'eau théoriquement possible produite pendant la polycondensation aient été enlevés du mélange de réaction. L'invention concerne également l'utilisation des polycondensés ainsi obtenus comme additifs de produits de lavage et de nettoyage et comme agents anti-incrustation.

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