Patent ID: 6752866
Filing Date: 2004-06-22
Classification: C04B

Abstract:
A method of preparing a cement matrix or hydraulic binder comprising:preparing an aqueous dispersion comprising a mineral filler and a dispersing agent, and adding the aqueous dispersion to a cement or hydraulic binder, wherein the dispersing agent comprises a copolymer prepared by the radical copolymerization of: a) 1% to 50% by weight of one or more anionic monomers; b) 2% to 65% by weight of one or more non-ionic monomers; c) 3% to 65% by weight of an alkoxy-, aryloxy-, alkylaryloxy- or arylalkyloxy-polyalkylene glycol urethane ethylenic monomer; d) 0% to 90% by weight of an alkyloxy-, aryloxy-, alkylaryloxy- or arylalkyloxy-polyalkylene glycol acrylate or methacrylate, or an alkoxy-, aryloxy-, alkylaryloxy- or arylalkyloxy-polyalkylene glycol allyl ether; e) 0% to 5% by weight of one or more cross-linking agents; and the total of monomers a), b), c), d) and e) is equal to 100%.