DISPERSING AGENT AND CEMENT ADMIXTURE

摘要

PCT No. PCT/JP89/00412 Sec. 371 Date Jun. 30, 1989 Sec. 102(e) Date Jun. 30, 1989 PCT Filed Apr. 17, 1989 PCT Pub. No. WO90/12642 PCT Pub. Date Nov. 1, 1990.The dispersant composed of a water-soluble salt of either a copolymer of a component in naphtha oil and maleic anhydride or a partial esterification product of said copolymer has improved dispersing ability and the dispersion containing this dispersant will experience only small changes with time. The cement admixture which is a salt of a copolymer of a component in naphtha oil and an unsaturated dicarboxylic acid anhydride or which has further contains a salt of the product of condensation between formaldehyde and a sulfonated aromatic hydrocarbon containing oil is an effective plasticizer and the cement mix incorporating this admixture has a satisfactory initial flow and will experience only small decrease in flowability over time.