METHOD FOR PRODUCTION OF IMPREGNATING MELAMINE-CARBAMIDE- FORMALDEHYDE RESIN

METHOD FOR PRODUCTION OF IMPREGNATING MELAMINE-CARBAMIDE- FORMALDEHYDE RESIN

FIELD: method for production of impregnating melamine-carbamide-formaldehyde resins useful in paper-tar films for lamination of particle boards and plywood. ^ SUBSTANCE: claimed method includes condensation of carbamide-formaldehyde concentrate with melamine or carbamide or mixture thereof in presen...

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Hauptverfasser: AFANAS'EV S.V, SEMENOVA V.A, MAKHLAJ V.N, BARYSHEVA M.A
Format: Patent
Sprache:eng ; rus
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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creator AFANAS'EV S.V
SEMENOVA V.A
MAKHLAJ V.N
BARYSHEVA M.A
description FIELD: method for production of impregnating melamine-carbamide-formaldehyde resins useful in paper-tar films for lamination of particle boards and plywood. ^ SUBSTANCE: claimed method includes condensation of carbamide-formaldehyde concentrate with melamine or carbamide or mixture thereof in presence of 0.2-1.8 mass % of amine modifier as calculated to 100 mass % of formaldehyde-containing product, introduced in two steps up to final molar ratio of formaldehyde: melamine:carbamide = (1.83-2.0):(0.10-0.70):(0.33-1.20), total melamine dissolution, and resin cooling. As formaldehyde-containing product carbamide-formaldehyde concentrate comprising (mass %): carbamide 20-25; formaldehyde 55-60; and balance: water is used. Said product is obtained by methanol oxidative dehydration on iron-molybdenum catalyst in tube reactor followed by chemosorption of formaldehyde-containing gas with carbamide solution; and as amine modifier product containing (mass %) monoethanole amine 15-70; mixture 1-(2-oxyethyl)imidazolidone-2 and 1-(2-oxyethyl)ethylenediamine not more than 50; and balance: water. ^ EFFECT: optimized synthesis method; resin of improved quality, namely increased viscosity and decreased methanol content. ^ 3 ex, 1 tbl
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subjects 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
title METHOD FOR PRODUCTION OF IMPREGNATING MELAMINE-CARBAMIDE- FORMALDEHYDE RESIN
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