UREA-FORMALDEHYDE RESIN PRODUCTION PROCESS

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 bufferi...

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Hauptverfasser:	AFANAS'EV S.V, MAKHLAJ V.N
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	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