Setting retarder for hydraulically setting compositions
AssigneeSika Technology AG
InventorsMaria Winkler, Franz Etschmann
Life of this patent
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Abstract
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.
Claims15
A gypsum plaster composition containing, per 100% by weight of gypsum plaster as dry matter, from 0.001 to 0.5% by weight of a setting retarder, based on dry matter, wherein the setting retarder comprises:
- at least one single adduct and/or condensate which can be prepared by reaction of at least one protein hydrolyzate, amino acid, amino acid mixtures, and/or hydrochlorides thereof with at least one monocarboxylic, dicarboxylic, oligocarboxylic, and/or polycarboxylic acid which is not derived from an amino acid and/or carboxylic acid derivatives derived therefrom,
- wherein the carboxylic acid derivative is selected from the group consisting of carboxylic anhydrides, carboxylic acid halides, and active carboxylic esters.
Dependencies are inferred from the claim text.