| 摘要 |
Granules of ammonium or alkali metal poly- alpha -hydroxyacrylates having an apparent specific gravity of between 0.35 and 0.55 kg/dm3 and an ability to flow, expressed by the time taken for a weight of 250 g to flow through the 16 mm diameter orifice of an analysis funnel with a short stem, not exceeding 10 seconds are disclosed. The granules are prepared by agglomerating solid particles of small dimensions by spraying them in a fluid bed with a solution of poly- alpha -hydroxyacrylate. |
