Example 4
Into a 50-mL flask, 8.13 g (20 mmol) of the above-obtained 3-(2-hydroxy-1,1,1,3,3,3-hexafluoroisopropyl)-triethoxysilylbenzene, 2.98 g (20 mmol) of Silicate 40 (pentamer on average; manufactured by Tama Chemicals Co., Ltd.), 0.97 g (54 mmol) of water and 0.12 g (2 mmol) of acetic acid were charged. The resulting reaction mixture was heated to 40° C. and stirred for 1 hour. Further, the reaction mixture was heated to 70° C. and stirred for 2 hours. After the stirring, the water, acetic acid and by-produced ethanol were removed under vacuum by means of a rotary evaporator. As a result, there was obtained 6.63 g of a polysiloxane compound (4) as a white solid. The weight-average molecular weight of the polysiloxane compound was measured by the GPC system and found to be Mw=1860. The reaction scheme of this reaction is shown below.
