| 摘要 |
<p>A process for the preparation of an inorganic filler material coated with a nano-particulate tin compound which comprises forming a slurry of the filler material in an aqueous colloidal suspension of a tin compound, whereby the tin compound is directly precipitated from the colloidal suspension onto the surface of the filler, separating the inorganic filler from the colloidal suspension and, optionally, heating the coated filler to convert the hydrated tin compound to the anhydrous form. A fire retardant material comprises a particulate inorganic material coated with a nano-particulate tin product in an amount of from 1 to 100% by weight, based on the weight of the inorganic filler.</p> |
