Patent ID: 8444764

Claim:
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.