| 摘要 |
<p>The powder detergent composition for clothes washing having a bulk density of 0.50 g/mL or more, including 5 % by weight or more of a crystalline sodium silicate represented by the general formula (1): Na2O . xSiO2 . yH2O. In the formula, x and y each stands for a molar number, and x is from 1.5 to 2.2, and y is from 0 to 5. The crystalline sodium silicate has an average particle size of from 1 to 100 νm and comprises crystalline phases of a δ-phase and an α-phase, and at least one of a β-phase and an NS-phase, wherein the compositional weight ratios of the α-phase, the β-phase, and the δ-phase satisfy all of the following relationships: 0.05 « α/(α + β + δ) « 0.20; 0 « β/(α + β + δ) « 0.12; and 0.78 « δ/(α + β + δ) « 0.95.</p> |
