Method of preparing a silyphosphate mixture, silyphosphate mixtu

Details Method of preparing a silyphosphate mixture, silyphosphate mixtu Method of preparing a silyphosphate mixture, silyphosphate mixtu

1990-11-29

1991-08-20

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

528 14, 528 23, C07F 708

Patent

active

050415867

ABSTRACT:
Silylphosphate mixtures are prepared by slowly adding phosphoric acid to hexamethyldisiloxane under reflux while removing the by-produced water and after the phosphoric acid is added, the temperture is increased to from 150.degree. C. to 170.degree. C. to recover the silylphosphate mixture residue. The mixture has from 10 to 30 weight percent of a monosilyl phosphate of the formula

REFERENCES:
patent: 3019248 (1962-01-01), Fekete
patent: 3385822 (1968-05-01), Brown
patent: 4125551 (1978-11-01), Peterson
patent: 4177200 (1979-12-01), Razzano et al.

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