| 摘要 |
<p>A particulate flame retardant additive composition is prepared by absorbing a polyphosphate ester into the pores of a porous particulate inorganic substrate to produce a free-flowing particulate composition that contains at least 35-40 wt% of the polyphosphate ester and/or of product(s), if any, formed during such absorption process. Porous particulate silicas are the preferred inorganic substrates.</p> |
