Abstract: A process for preparing anionic polymers, including the steps of: (a) polymerizing one or more olefinically unsaturated carboxylic acids or esters thereof with one or more C1-18 alcohols to form an intermediate product; (b) esterifying the intermediate product with a mixture of one or more C1-4 alkyl polyalkylene glycols and one or more C6-22 alkyl and/or alkenyl polyalkylene glycols to form an ester; and (c) neutralizing the ester with a base is provided. Anionic polymers prepared according to the process, and water-containing cement preparations or concrete incorporating the anionic polymers are also provided.

Abstract: Anionic polymers obtainable by: (a) esterifying maleic acid or its anhydride with alkyl polyalkylene glycols; (b) copolymerizing the esters obtained with (meth)acrylic acid; and (c) converting the polymers obtained into the salt form by addition of alkali metal bases; are disclosed.