FIELD: chemistry of organosilicon compounds. SUBSTANCE: product: 3-[N, N-bis-(2-hydroxy-3-methacrylhydroxypropyl)amino]-propyl- -(triethoxy)-silane of the formula: 
. Method of synthesis involves interaction of 3-aminopropyltriethoxysilane and glycidylmethacrylate at continuous regime at 105-110 C for 20-25 min in the presence of 2,6-di-tert. -butyl-4-methylphenol at amount 0.5-1 wt.-%. Synthesized compound shows viscosity 92-96 MPa x s and good water solubility at pH = 4. Synthesized compound is used for fiberglass dressing. EFFECT: improved method of synthesis. 1 tbl
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