Method and composition to inhibit the staining of water-contacting surfaces, such as those in a toilet bowl, which is caused by manganese present in household water in the presence of an oxidizing material. Manganese staining is inhibited by supplying to the water 0.1 to 10 ppm of a substance selected from sodium polyacrylates and ethylene- maleic anhydride copolymers and partially hydrolyzed polyacrylamide material. Compositions are also described in the context of an automatic toilet tank dispenser which provides sufficient quantities of the above materials in solution to inhibit manganese staining of toilet bowl surfaces.
抑制与
水接触表面(如马桶中的表面)沾污的方法和组合物,这种沾污是由存在氧化物质的家庭用
水中的
锰引起的。在
水中加入 0.1 至 10 ppm 的聚
丙烯酸钠、
乙烯-
马来酸酐共聚物和部分
水解的聚
丙烯酰胺材料,可抑制
锰染色。还描述了一种自动马桶
水箱分配器的组合物,该分配器可提供足够数量的上述材料溶液,以抑制马桶表面的
锰污染。