UREA-FORMALDEHYDE RESIN PRODUCTION PROCESS

摘要

FIELD: polymer production. SUBSTANCE: urea-formaldehyde concentrate is subjected to condensation with first portion of urea in presence of viscosity- control agent followed by heating variable-acidity aqueous solution and reaction of intermediate with additional amount of urea in presence of buffering additive, after which resulting resin is cooled. EFFECT: intensified polycondensation reaction. 2 cl, 1 tbl