Setting retarder for hydraulically setting compositions

Details Setting retarder for hydraulically setting compositions Setting retarder for hydraulically setting compositions

C - Chemistry, Metallurgy

04

B

C04B 24/04 (2006.01) C04B 24/12 (2006.01) C04B 40/00 (2006.01)

Patent

CA 2719866

The present invention relates to a setting retarder for compounds that set hydraulically, containing at least one at least simple adduct and/or condensate, the retarder being produced by the reaction of at least one protein hydrolysate, one pure amino acid, amino acid mixture, and/or the hydrochlorides thereof having at least one mono-, di-, oligo- and/or polycarboxylic acid which is not derived from an amino acid, and/or a carboxylic acid derivative derived therefrom, wherein the carboxylic acid is selected from a group including carboxylic acid anhydrides, carboxylic acid halogenides, and/or carboxylic acid active esters.

La présente invention concerne un retardateur de prise pour compositions à prise hydraulique. Le retardateur de prise selon l'invention contient au moins un condensat et/ou un produit d'addition au moins simple, qui peut être fabriqué par réaction d'au moins un hydrolysat de protéine, un acide aminé pur, des mélanges d'acides aminés et/ou leurs chlorhydrates comportant au moins un acide mono-, di-, oligo- et/ou polycarboxylique, qui n'est pas dérivé d'un acide aminé, et/ou les dérivés d'acide carboxylique en dérivant. Selon l'invention, le dérivé d'acide carboxylique est choisi dans le groupe constitué des anhydrides d'acide carboxylique, des halogénures d'acide carboxylique et/ou des esters actifs d'acide carboxylique.

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