Silica suspension in an organic solvent and method for its manufacture

A suspension of silica particles comprising:

• a liquid [liquid (L)] selected from the group consisting of the linear or branched, saturated or unsaturated, aliphatic and cycloaliphatic hydrocarbons having from 6 to 30 carbon atoms and of the aromatic hydrocarbons having from 6 to 10 carbon atoms,
• silica particles, wherein the silica particles are precipitated silica particles, and
• at least one compound [compound (S)] selected from the group consisting of:
• the acid phosphate esters of formula (I)
• P(O)((OCH2CH2)nOR)a(OM)b (I)
• wherein:
• R represents a linear or branched, saturated or unsaturated, aliphatic hydrocarbon group having from 1 to 24 carbon atoms or an aromatic hydrocarbon having from 6 to 24 carbon atoms;
• M is H, Na or K, n is an integer from 4 to 8;
• a is an integer equal to 1 or 2, and b is 3-a;
• characterised in that said compound(S) is miscible in liquid (L) in the temperature range from 20° C. to 50° C.