Patent ID: 7968741

Claim:
A method of preparing a disilanol compound by hydrolyzing a dichlorosilane compound having Si—Cl bonds at both ends, wherein the method comprises: hydrolyzing a dichlorosilane compound represented by the following formula (1) Cl—Z—R 1 —R f —R 1 —Z—Cl (1) wherein R f is a divalent fluorinated polyether group, R 1 may be the same with or different from each other and is a substituted or unsubstituted divalent hydrocarbon group which may have at least one atom selected from the group consisting of oxygen, nitrogen, silicon, and sulfur atoms, and Z is a group represented by the following formula (2) —SiR 2 R 3 — (2) wherein R 2 and R 3 may be the same with or different from each other and are monovalent organic groups in the presence of a tertiary amine compound and a solvent comprising a fluorinated solvent; and storing the disilanol compound in the presence of the tertiary amine having a boiling point of 100° C. or higher, said disilanol compound being obtained by the hydrolysis.