Silicophosphoric acid ester

Silicon dioxide 16, 101, 938 Silicone oil as antifoam agent 13, 116 15,122 18, 213 Silicophosphoric acid ester chains... 

Colloids of silicophosphoric acid derivatives have not been further investigated, but silicon phosphates have been studied. Jacoby (172) found that at atmospheric pressure, melts of SiO, and P,0, could be made in which 21 compounds were detected. Physical properties of SiO,-P,Oj and 3SiO, 2P,Os were reported. Dissolu tion of some compounds of this type in water or alcohols would probably give aqueous dispersions of colloidal silica, or mixed acid esters similar to that described above. 

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