| 摘要 |
<p>A dispersing agent and a cement admixture are disclosed. The dispersing agent comprises a water-soluble salt of a copolymer of a component of a naphtha oil with maleic anhydride or its partial ester and has excellent dispersing properties, and a dispersion prepared by using this agent undergoes less changes with time. The cement admixture comprises a salt of a copolymer of a component of a naphtha oil with an unsaturated dicarboxylic acid anhydride and, optionally, a salt of formalin adduct of a sulfonate of an aromatic hydrocarbon-containing oil and is an excellent fluidizing agent. A cement compound containing this admixture shows a good initial fluidity which undergoes less deterioration with time.</p> |
