FIELD: polymer production. SUBSTANCE: resin is obtained by condensation of urea-formaldehyde concentrate with first and second urea portions in presence of, as buffer additive, vat residue originated from monoethanolamine purification in ammonia production process, said additive being introduced in alkaline stage before charging first urea portion. EFFECT: optimized conditions of synthesis of low-molecular high- viscosity urea-formaldehyde resins and improved their quality. 1 tbl, 3 ex
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