METHOD OF PREPARING CARBAMIDOFORMALDEHYDE RESINS

FIELD: chemical industry. SUBSTANCE: carbamidoformaldehyde resins are prepared by condensation of carbamide with formaldehyde in the presence of modifier in medium having variable acidity, concentration, addition of some amount of carbamide in two portions at certain ratios of components, pH of medi...

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Bibliographic Details
Main Authors DAUT V.A, MAJER V.V, MEKHTIEV AVTANDIL ADGOZAL «GLY, MUSTAFINA O.E
Format Patent
LanguageEnglish
Russian
Published 10.11.1998
Edition6
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
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Summary:FIELD: chemical industry. SUBSTANCE: carbamidoformaldehyde resins are prepared by condensation of carbamide with formaldehyde in the presence of modifier in medium having variable acidity, concentration, addition of some amount of carbamide in two portions at certain ratios of components, pH of medium, temperature and duration. The claimed resins are low toxic and have sufficient reactivity and strength of resin-based adhesive joint. EFFECT: improved properties of the carbamidoformaldehyde resins. 5 cl, 1 tbli
Bibliography:Application Number: RU19960101086