| 摘要 |
A novel composition for preventing and controlling tartar, which composition comprises, as the essential agent, a magnesium polycarboxylate complex which has been prepared by the reaction or interaction of a magnesium compound and a polycarboxylate which is selected from a group consisting of maleic acid copolymer, sulphoacrylic acid oligomers and tricarboxy-oxa-butanol or -pentanol. |
