| 摘要 |
<p>A method for washing prefoamed particles, comprising washing prefoamed particles prepared by depressurization foaming and having a sparingly water-soluble inorganic compound as a dispersant deposited thereon with an aqueous solution of a water-soluble compound having in its molecule at least one functional group and at least one hydrophilic functional group bondable to the surface of the sparingly water-soluble inorganic compound. This washing method enables prefoamed particles reduced in the amount of an inorganic dispersant deposited thereon to be prepared by depressurization foaming by using the same equipment as the one used in washing with water or hot water without the use of a large amount of water or hot water.</p> |
