| 摘要 |
<p>The invention relates to precipitated silica microbeads having sensory properties in the mouth and a specific surface CTAB of at least 100 m2/g, an oil absorption DOP of at least 200 ml/g, a mean particle diameter of between 50 and 600 νm, at the surface between 0.5 and 2 parts by weight (expressed as zinc metal) of a zinc derivative with a degree of oxidation of 2 per 100 parts by weight of silica, a pH of between 7 and 9, and possibly between 0.2 and 5 parts by weight of a white pigment for 100 parts by weight of silica. The invention also relates to a method for producing said microbeads by precipitation, treatment of the silica slurry with a soluble zinc compound, mechanical thinning of the cake resulting from the separation of the treated silica slurry, and drying by atomisation. The invention further relates to their use in toothpaste preparations as sensory agents acting in the mouth.</p> |
