| 摘要 |
PURPOSE:To bring about a chemical reaction with dirt constituents to thereby improve detergency by using a detergent which contains a surface active agent, a water-soluble solvent and a buffer material obtained by mixing acidic and alkalline materials and hence has a specific pH. CONSTITUTION:An acidic material and an alkalline material are mixed to obtained a buffer material selected from a hydroxycarboxylic acid, (hydroxy) aminocarboxylic acid, low-molecular polycarboxylic acid and water-soluble salts thereof, which has a nature of readily reacting with dirts containing ions of polyvalent metals such as Ca, Mg and Fe and hence reacts with the dirts chemically to convert the washing solution into that of more acidic conditions. A surface active agent, either nonionic or anionic, a water-soluble solvent having a polyether structure, the buffer material, and the balance of water are mixed to obtain a liquid detergent of pH5-7. |
