| abstract |
The silica, pref. in the form of a filter cake, is dispersed uniformly in water, adjusted to pH 1-6, pref. 2-4, with stirring, and stabilised by addn. of 0.001-1, pref. 0.005-0.1% thickener w.r.t. the total amt. of dispersion. The pref. thickener is alpha-methylcellulose strengthened with synthetic resin. The dispersions are useful, e.g. as antislip agent for cardboard. The process makes it possible to produce stable dispersions from isolated and opt. dried silicas, which are not alkaline. |