water reducer e g sulfonated polystyrene and an antifoam agent e g a polyalkylenepolyol application_number US 6791587 A description compositions containing a polymer or copolymer of a hydroxyalkyl meth acrylated have been found to provide improved workability when added to cement mixtures polymers and copolymers of hydroxyethyl hydroxypropyl 4 hydroxybutyl and 2 hydroxybutyl esters of acrylic or methacrylic acids have been found to be effective the copolymers can be of the above esters with each other or with acrylic or methacrylic acids or their salts another compound found to be useful as a monomer or co monomer is 2 sulfoethyl methacrylate 2 sem poly hydroxyalkyl meth acrylates having molecular weights mw of from about 2 000 to about 150 000 are suitable for use in cement mixtures those having molecular weights in the range of from about 3 000 to about 50 000 are preferred and most preferred are those having molecular weights in the range of from about 4 000 to about 10 000 the above ranges also include copolymers of any of the hydroxyalkyl meth acrylates with each other or with the other co monomers mentioned the use of the term 34 meth acrylate 34 is to be construed as meaning either or both acrylic and methacrylic acid esters useful in the composition generally the homopolymers and copolymers of the hydroxyalkyl meth acrylates and water soluble at room temperature and maintain their solubility as the temperature rises certain of the homopolymers of 2 hydroxybutyl acrylate 2 hba and hydroxypropyl acrylate hpa have an inverse solubility being.