METHOD OF SYNTHESIS OF TETRAFURFURYLHYDROXYSILANE OR OLIGOFURFURYLHYDROXYSILOXANES Russian patent published in 1995 - IPC

FIELD: organosilicon chemistry. SUBSTANCE: product: tetrafurfurylhydroxysilane or its oligomer. Value d24

⁰ = 1.27, η = 32 s, molecular mass is 790. Reagent 1: a) Si(OC₂H₅)₄ or b) ethoxysiloxane. Reagent 2: furfuryl alcohol. Reagent 3: water. Reaction conditions: in the presence of KOH in ethanol at 120-130 C. At the first stage molar ratio of reagent a) or b) to reagents 2 and 3 is 1:(3.9-1.5):(0.05-1.25) and at the second stage - the rest quantity of a) or b), pressure is 0,6-0,8 kg/cm². EFFECT: improved method of synthesis. 3 tbl